JP5132630B2 - Corresponding behavior prediction system and corresponding behavior prediction method - Google Patents

Description

  The present invention relates to a response behavior prediction system device and a response behavior prediction method for predicting response behavior from a contact report in an emergency such as a disaster.

  In the event of an emergency such as a disaster, or during training for that purpose, we perform a correlation analysis between the sent message and the response action for this report. The results of this correlation analysis are stored in a database and received via e-mail or other means. When this is done, a corresponding behavior prediction system that predicts the corresponding behavior by referring to the correlation database from the character string included in the report has already been published (see, for example, Patent Document 1).

JP 2008-234306 A

  In the case of the above-described conventional technology, in order to analyze the correlation between the report text and the corresponding action, the report text is classified into classes, and unique attributes are defined to make an ontology.

  By the way, since the report is generally written in a natural language, it includes ambiguity, and the disaster situation is expected to change in a complicated manner at the time of a disaster.

  Therefore, in predicting the response action with such a system, it is necessary to consider the ambiguity of the report text, the diversity of situations, and the like.

  However, in the past, although a series of flow and concept of predicting the response action from the report sentence has been disclosed, specific actions to be taken when an urgent event occurs It is not disclosed.

  The present invention has been made to solve such problems, and confirms what action should be taken for disaster prevention during an emergency such as a disaster or training assuming an emergency. An object of the present invention is to provide a response behavior prediction system and a response behavior prediction method.

  In order to solve the above-mentioned problem, the response behavior prediction system of the present invention divides a phase in which a typical communication message transmitted from a related person is generated in an emergency or a training assuming them into several parts, A database that stores the expected behavior of the communication notification for each phase and the keywords included in the communication notification, and a receiver that receives the communication notification message transmitted from the parties via the network; A natural language analysis unit that categorizes a character string obtained by performing natural language analysis of a message received by the reception unit, and a character string of the message divided by the natural language analysis unit. A keyword extraction unit that extracts a keyword having a high frequency or a keyword having a large connection between morphemes, and a keyword extracted by the keyword extraction unit In the key, by referring to the database to identify the phase in which the contact notification belongs to and a behavior prediction portion for notifying the action to make the corresponding user in the specified phase.

  ADVANTAGE OF THE INVENTION According to this invention, what kind of action should be actually taken for disaster prevention can be confirmed at the time of the emergency which assumed emergency or emergency like a disaster.

It is a figure which shows the structure of the corresponding | compatible action prediction system of one embodiment of this invention. It is a figure which shows the correlation with an event, a report, and action. It is a figure which shows the content of the database which defined the disaster prevention phase shown in FIG. It is a flowchart which shows the operation | movement which specifies a disaster prevention phase from a keyword (attribute). It is a flowchart which shows the operation | movement which specifies a report from a keyword (attribute). It is a flowchart which shows operation | movement of this corresponding | compatible action prediction system. It is a figure which shows the table | surface which analyzed the report in the disaster prevention phase. It is a figure which shows a mode that it infers between keywords, when the report name and the format are the same, and when several reports from which the content differs are received. It is a figure for demonstrating the correlation (co-occurrence degree) between vocabularies. It is a figure which shows an example of the corresponding | compatible action prediction operation | movement of this corresponding | compatible action prediction system. It is a figure which shows the operation | movement which discriminate | determines an action condition (whether corresponding action is implemented) in time series according to the flow of notification. It is a figure which shows a mode that the time-sequential context between actions is set as an attribute.

  Hereinafter, a corresponding behavior prediction system according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing a configuration of a corresponding action prediction system.

  As shown in FIG. 1, the response prediction system according to this embodiment includes an emergency call transmission terminal 2 (hereinafter referred to as “report terminal 2”) and an emergency call reception terminal in an emergency call communication network 1. It is comprised by connecting with the corresponding | compatible action prediction apparatus 3 as.

  The terminal 2 for sending an emergency call is installed with an e-mail transmission software 51 or a message transmission software, and the contact notification 4 is transmitted to the corresponding action prediction device 3 by an electronic message such as an e-mail or a message in an emergency. In this example, it is assumed that the communication means is digital data such as e-mail. However, in the case of voice such as a telephone, a voice recognition function is incorporated in the reporting terminal 2 and the contents of the communication report are digitally displayed. Data can be converted.

  That is, in this system, in the event of an emergency, a digitized contact notification 4 is transmitted from the notification terminal 2 and is received by the corresponding behavior prediction device 3 through the communication network 1.

  The corresponding behavior prediction device 3 includes a database 31, a reception unit 32, a natural language analysis unit 33, a keyword extraction unit 34, a behavior prediction unit 35, a CPU 36, a memory 37, and the like.

  The database 31 includes a basic dictionary 41, a special dictionary 42, a keyword-corresponding behavior correlation table 43, and the like. As the database 31, an ontology database having the disaster prevention phase as the highest class is used.

  In this ontology database, the disaster prevention phase class holds, as attribute information, at least a keyword group included in a report sentence characteristic of the phase. The ontology database also contains reports as a subclass of the disaster prevention phase class. This subclass holds, as attribute information, at least a sender, a receiver, a corresponding action, a target person for the corresponding action, and a keyword group representing the correlation between the report sentence and the corresponding action.

  The basic dictionary 41 and the special dictionary 42 store character strings for each morpheme when the contact notification 4 is subjected to natural language analysis. The basic dictionary 41 stores character strings of proper nouns (words, idioms, phrases, etc.) having a general meaning. The special dictionary 42 stores character strings of proper nouns (words, idioms, phrases, etc.) having special meanings such as plant names and accident event names when specializing in disasters such as nuclear power plants. ing.

  The keyword-corresponding behavior correlation table 43 divides a phase (event) in which a typical communication message transmitted from a related person is generated in an emergency or a training that assumes them into several, and reports a notification for each phase. Are stored in association with the expected behavior and the keyword included in the notification.

  The receiving unit 32 receives the communication report 4 (e-mail) transmitted from the contact report sender (report terminal 2) in an emergency and training assuming them through the communication network 1.

  The natural language analysis unit 33 performs, for each morpheme, characters or character strings obtained by performing natural language analysis on the content of the contact notification 4 (e-mail) received by the reception unit 32 (hereinafter referred to as “report message”). Break down. Natural language analysis refers to dividing a sentence into morphemes, which are the smallest units having meanings such as nouns and verbs.

  The divided morphemes are proper nouns registered in advance in the basic dictionary 41 and the special dictionary 42, for example, words (phrases) having special meanings such as plant names and accident event names, and words having general meanings ( Words).

  The keyword extraction unit 34 sequentially extracts keywords having a high appearance frequency and / or keywords having a large connection between morphemes from the character strings (morphemes) classified by the natural language analysis unit 33, and sends them to the behavior prediction unit 35. hand over.

  The behavior prediction unit 35 refers to the keyword-corresponding behavior correlation table 43 of the database 31 using the keyword extracted by the keyword extraction unit 34 as a key, identifies the phase to which the report sentence belongs, and the responder in the identified phase The action to be taken is read from the database 31 and notified.

  The behavior prediction unit 35 refers to the database 31 created based on a typical emergency report in advance by using the keyword passed from the keyword extraction unit 34 as a key by the inference function, and determines the behavior expected for the report. Predict.

  As an inference function, when predicting actions from the contents of a report using different keyword attributes, first use one of the keyword attributes to narrow down, and then use multi-level inference to specify the remaining keyword attributes in more detail. Is preferred. As a method for selecting a keyword to be referred to by the inference function, selection based on the frequency of vocabulary included in the report sentence and selection based on correlation based on the co-occurrence degree are used. In selecting a keyword group that represents the correlation between the message text and the corresponding action, it is preferable to estimate from a high frequency characteristic of each message.

  In other words, the behavior predicting unit 35 defines communication as a typical phase associated with the progress of an event, that is, a disaster prevention phase, by communicating notifications between the parties involved in an emergency and training that assumes them, and the communication. By estimating the disaster prevention phase to which the report belongs, the response action to the report sentence is predicted. The disaster prevention phase includes the progress of events from the occurrence of the target disaster to the end, and can be distinguished from other phases based on typical reports and responses to each phase.

  As a method of notifying the predicted action, a document or message instructing the corresponding action may be output to a screen such as the display device 38, or a voice message or warning sound is emitted from a speaker or the like to guide the responder. May be.

  In predicting behavior, the keyword extraction process is repeated for each report subclass, disaster prevention phase class that includes all of those subclasses, and a set of them for different sets of plants and disaster events. Learn and set in database 31.

  The CPU 36 controls the above-described units and controls the entire apparatus. The memory 37 holds data as a work area for the CPU 36. In addition, the memory 37 temporarily stores received e-mail data.

  In this response behavior prediction system, a database 31 indicating a correlation between a notification and an action is constructed based on a correlation analysis between the notification sentence and the corresponding behavior, and a keyword that characterizes the correlation between the notification and the action is used. By performing the behavior inference, it becomes possible to predict the behavior of a new message other than that used for learning, and contribute to emergency response support.

  Here, the characteristic flow of the emergency event will be described with reference to FIG. In general, emergency events such as disasters do not depend much on the type of disaster, and as shown in FIG. 2, time series progress (flow) such as occurrence 9a, expansion 9b,... Release (termination) 9c, etc. ), And there are notification flows (first notification 10a, second notification 10b, third notification 10c, etc.) corresponding to this time-series progress (flow).

  Each notification includes pure information and instructions for actions to be taken as the event progresses. Therefore, there is a flow of actions (first action 11a, second action 11b, third action 11c, and the like) that should be dealt with for a report with such an instruction.

  Accordingly, a phase 12 including typical combinations of such event progress, notification flow, and behavior flow can be defined. As mentioned above, this is a chronological separation of notifications to encourage or support actions that should be taken to prevent the progression and expansion of disaster events and their response actions, that is, disaster prevention or mitigation actions. In this case, it is called the disaster prevention phase.

The disaster prevention phase can be defined for each target disaster, but here, as an example, the disaster prevention phase is defined on the basis of disaster prevention training conducted at a facility such as a nuclear power plant. In the case of a nuclear power plant or the like, assuming that a disaster occurs, a person in charge of the disaster is always appointed, and the actions taken by the person in charge of the disaster are classified based on the training scenario.
Phase 1 Training for initial response
・ Training on issuing the Declaration of Emergency in the 2nd phase, from the first report of trouble reports to various measures related to reports based on Article 10 of the Nuclear Disaster Act
・ Training related to evacuation, etc. in the third phase from notifications based on Article 10 of the Nuclear Disaster Law to various measures related to the issuance of nuclear emergency declarations, etc.
・ Various measures from measures related to evacuation / evacuation decisions to the stop of radioactive material release 4th phase Training related to post-treatment ・ Various measures related to post-treatment after stoppage of radioactive material release

  When this training is rewritten into action in an actual disaster, "First response", 2. 2. “Emergency declaration issued”; 3. “Evacuation instructions”, 4. It can be divided into a large action phase called “post-action”.

  Furthermore, when a phase from the point of view of reporting is added to this action, it is divided into the following nine phases.

1. “Initial response”: [1] Accident (abnormal disaster) occurred, [2] Article 10 event,
2. 2. “Emergency declaration issued”: [3] Article 15 event, [4] Injured. “Evacuation instructions”: [5] Risk of radiation emission, [6] Radioactive substance release "Post-action": [7] Accident collection measures, [8] Accident recovery, [9] Emergency system cancellation

  The above is an example of how to divide the disaster prevention phase, but by defining a phase in which the flow of emergency notifications for event progress and the flow of response actions according to notification instructions are separated in time series, notifications are made. The basic principle of the present invention is that the action can be narrowed down by identifying this phase from the content. A specific example of the disaster prevention phase will be described later.

  In this way, by setting a disaster prevention phase that characteristically includes the progress of the report text and its response action, the correlation between the content of the report text and the response action can be clarified, and the accuracy of action prediction can be improved. Can contribute to support for emergency response.

  Next, the definition of the disaster prevention phase will be described with reference to FIGS. In defining the disaster prevention phase described in FIG. 2 on the database 31, a knowledge database expression method on a computer called an ontology is used. An ontology generally consists of a “classification system” and an “inference rule collection”, and OWL has been developed by the W3C working group as a standard language that enables cross-reference and interoperability on computers. .

  The ontology created in this system is defined in the form of linking the communication notification 4 and the corresponding action resulting from it in each disaster prevention phase, and the keywords necessary for it to be classified and extracted by inference .

  For example, as shown in FIG. 3, the highest disaster prevention phase class 13 is defined. The disaster prevention phase class is characteristic of the disaster prevention phase and has a keyword 14 having a high probability included in the report as an attribute. In addition, the notification-response action is defined as a subclass 15 of the highest disaster prevention phase class 13, and each subclass includes a notification 16 for instructing a specific action or transmitting information as a subclass thereof. Is defined. They include attribute information 17 in which keyword groups for classification are defined.

  Here, in defining the notification subclass, classification is performed by capturing the notification in the form of “notification is what prompts the target person to take action regardless of the notification”.

  In other words, the correspondence between the notification and the action can be described by incorporating in the ontology the characteristic of the notification that the notification prompts the user to take what kind of action. Further, since the response action is prompted by the notification, it can be defined as an attribute of the notification class.

  For example, if an “abnormal disaster notification” in the first report of an accident is sent from an operator to an organization such as a local government or country, each recipient must take the action of “confirm the occurrence of an accident”. I must.

  In this way, since all disaster prevention organization actions are triggered by notification and propagated in a chain, all notifications are defined as classes that encourage some action, and the attributes of each notification class include the following four actions including response actions: By defining the attribute as a minimum, it is possible to associate “report” with “response action”. In other words, from the following four attributes, a subject who promotes an action, a receiver who is prompted to act, a content of the action, and a target that receives the action can be defined.

Attributes of the notification class that prompts the action [1] Originator of the report: Sender [2] Organization that receives the report: Receiver [3] Corresponding action: Action [4] Target of action: Target of action

  A keyword group is defined for each of the attribute 14 and the attribute 17 in FIG. 3. The keyword group of the attribute 14 is a keyword for specifying the disaster prevention phase, and specific examples will be described in the following examples. It is a relatively generalized keyword that represents the progress of an event, such as “occurrence”, “enlargement”, “release”.

  On the other hand, since the keyword group of the attribute 17 is a keyword for specifying a report, it is a more specified keyword including proper nouns.

  That is, as shown in FIG. 4, when the report sentence is subjected to natural language analysis (step S101) and keywords are extracted (step S102), the keyword group of the attribute 14 is “in which disaster prevention phase the report containing this keyword is in. The purpose is to infer the attribute of the keyword by a logical operation in response to the question “Do you belong?” (Step S103), and to separate and extract the corresponding disaster prevention phase (step S104).

  On the other hand, as shown in FIG. 5, when the report sentence is subjected to natural language analysis (step S201) and keywords are extracted (step S202), the keyword group of the attribute 17 is “report including this keyword in the disaster prevention phase”. The purpose is to infer the attribute of the keyword by a logical operation in response to the question “What is?” (Step S203), and to separate and extract the corresponding report sentence into a report-action subclass (step S204). is there. In this example, the title and sender / receiver included in the report text are used for inference as the attribute of the report.

  The above process is demonstrated as operation | movement of the corresponding | compatible action prediction apparatus 3 with reference to FIG. That is, the corresponding action predicting device 3 reads the received report sentence into the memory 37 in step S1 of FIG. Here, it is assumed that already digitized data such as e-mail is read into the memory 37 as it is, and voice data is digitized after voice recognition.

  When the report sentences are sequentially read, the natural language analysis unit 33 performs natural language processing in step S2, and performs analysis processing in step S3 to extract keywords such as important vocabulary. When this keyword extraction process is performed on the entire report sentence, an important vocabulary database for the report sentence is created.

  When the important vocabulary database is completed, in step S4, the behavior prediction unit 35 performs a matching process using an inference function on the keyword of the disaster prevention phase in the report sentence ontology database, and identifies the disaster prevention phase here.

  When the disaster prevention phase is identified, the behavior prediction unit 35 refers to the subclass data of the disaster prevention phase from the report sentence ontology database, that is, the report sentence data, and in step S5, the important vocabulary database of the target report sentence and its Matching processing using subclass attribute data, that is, sender / receiver data and keywords and an inference function is performed. This process is executed until the report text is specified.

  When the report text is specified, the behavior prediction unit 35 extracts the corresponding behavior attribute of the report text from the ontology database in step S6, and performs behavior prediction in step S7. When the behavior prediction is completed, the behavior prediction unit 35 performs necessary processes such as behavior monitoring and response behavior guidance in step S8.

  That is, in this example, two-step inference is performed in step S4, that is, inference to the disaster prevention phase, and inference for specifying a report sentence in the disaster prevention phase specified in step S5. These processes will be specifically described below.

  In this way, the efficiency and accuracy of behavior prediction are improved by narrowing down the phase to which the report belongs in the relatively large framework such as the disaster prevention phase, and identifying more specific reports in the narrowed down phase. can do.

  A specific example of the database 31 will be described with reference to FIGS. In the contents of the database 31 (report sentence ontology database) shown in FIG. 3, as can be seen from the configuration, the disaster prevention phase class is at the top of the database 31 and has keywords that characterize each disaster prevention phase as attributes. Each report subclass also has a keyword that characterizes the report as an attribute. In principle, the disaster prevention phase is set based on the progress of disaster events, which are generally highly correlated with the necessary response actions.

  That is, for example, for the occurrence of an event, the initial response such as contact and convocation to the person in charge or the related department, and for the release of a hazardous substance, the release control and the evacuation instruction to the surroundings.

  In addition, it is desirable to have a disaster prevention phase setting method that can be characterized by the reporting side in addition to actions. Therefore, the disaster prevention phase setting and keyword selection are mutually dependent.

  For this reason, although it is difficult to set both from a general procedure, it can implement roughly as follows. Taking the nuclear disaster prevention mentioned above as an example, the flow of the roughest response action based on the progress of the event is as follows. "First response", 2. 2. “Emergency declaration issued”; 3. “Evacuation instructions”, 4. “Post-action”.

  1. In the case of nuclear power, in the case of nuclear power, there is an accident report from a business operator first, and after that report, it is a target event (specific event) for notification based on the Nuclear Disaster Special Measures Law (National Disaster Law). However, the response is very different. Generally, it is called Article 10 report specific event, and the report is defined as follows.

  [1] Notification in accordance with Article 10 of the Nuclear Disaster Law → The nuclear disaster prevention manager shall immediately report to the competent minister and the prefectural governor and municipal mayor who has jurisdiction over the place where the event occurred.

  [2] Establishment of the Nuclear Emergency Warning Headquarters (Ministry of Economy, Trade and Industry) of the Ministry of Economy, Trade and Industry → After receiving the notification, NISA will contact the staff and convene, and determine whether it is a nuclear emergency. If there is not, set up a warning headquarters. The Security Headquarters requests local dispatch support from the Defense Agency and the National Police Agency as necessary.

  [3] Establishment of the Ministry of Economy, Trade and Industry Nuclear Disaster Local Warning Headquarters (Local Headquarters Headquarters) → The local dispatch team organized by the headquarters headquarters will set up the local headquarters headquarters, check the damage status of the transport containers, radioactive materials On-site confirmation of the release status of sewage and the status of access restriction measures. As a general rule, the Local Warning Headquarters will be established in the area around the accident that is not affected by radiation or radioactive materials.

  [4] First Aid Measures → Nuclear operators, etc. should immediately set up restricted access areas, carry out measures to prevent the spread of pollution / leakage, take measures against shielding, monitor, prevent fire extinguishing / fire spread, injured Measures such as rescue and evacuation will be carried out accurately and promptly.

  That is, since the notification flow and the corresponding action as described above are defined after the occurrence of the Article 10 specific event, the notification can be specified by dividing the phase before and after the occurrence.

Therefore: It can be determined that it is appropriate to divide the “initial response” into two phases: [first phase] accident (abnormal disaster) occurrence and [second phase] Article 10 event.
When the reports in each individual disaster prevention phase are analyzed, the reports can be classified as shown in Table 18 as shown in FIG.

  This is because of the above-mentioned “attribute of the notification class that prompts the action” ([1] sender of the report: sender, [2] organization that receives the report: receiver, [3] corresponding action: action, [4 ] Target of action: Target of action) and the content of the report. The content of this report is generally reflected in the title of the report, but the detailed contents should be specified by keywords.

  From the attributes [1] to [4] above, reports can be identified with considerable probability. However, periodic reports and event progress reports may have the same attributes but different contents. Is expensive.

  That is, as illustrated in FIG. 8, in order to identify a plurality of reports having the same report name and format but different contents, inference between the keywords specifying the contents and the keywords of the report subclass information in each disaster prevention phase Is required.

  That is, the keywords for the disaster prevention phase report subclass information must be selected so that they can be identified from the content of such reports, and the disaster prevention phase class keywords should indicate concepts and states that collectively represent these individual keywords. Select appropriate keywords.

  As a keyword selection method, you can first select proper nouns that can identify the disaster prevention phase and notifications, such as Article 10 (specific) events or Article 10 notifications, but others are included in the notification text. Select from the frequency of occurrence of vocabulary and the correlation between vocabularies. The vocabulary here refers to the morphemes described in the first embodiment and proper nouns combining them.

  A high frequency of occurrence is likely to be an important keyword in the report or event, but it is generally a vocabulary that has a high frequency of occurrence within the disaster prevention phase or even in the target disaster event. Should be careful. Various indexes for screening such vocabulary have been proposed, but there is an index called tf-idf (TF / IDF) as an index that is most often used. In the present system, this tf-idf (TF · IDF) is used as an index for estimating from a high frequency characteristic for each notification.

  “Tf” is an abbreviation of “Term Frequency”, which is the frequency of appearance of a vocabulary (word) in a document. When this is high, it indicates that the word is used many times. I can say that. However, this value increases with the length of the document.

  “Idf” is an abbreviation of “Inverted Document Frequency” and is defined by the logarithm of the reciprocal of the relative document frequency in which a word appears. The smaller the number of documents that appear, the more the word is characterized.

  By taking these products, it is convenient to characterize the report on the contrary, because many (TF) that appear frequently in the document appear only in a small number of documents (IDF). It can be said that it is a good indicator.

  That is, for selecting an attribute keyword for each notification, such a vocabulary having a high appearance frequency and a vocabulary having a high appearance frequency characteristic to the notification may be selected.

  On the other hand, as a keyword group that characterizes the disaster prevention phase, a vocabulary of roles that can generalize or link the keywords of individual reports is desirable. Generalization means that individual unique keywords can be handled comprehensively.

  For example, if the vocabulary that appears in common among unique keywords is “pump stop”, “water supply stop”, or “water injection stop”, “stop” is selected. Moreover, attention can be paid to the co-occurrence degree as a keyword having a correlation with unique keywords.

  The degree of co-occurrence represents the frequency probability of the common vocabulary that appears in common, and is an index that indicates whether or not the probability of the appearance of the second vocabulary is high when the first vocabulary 1 appears in a document. A typical example is the Jaccard coefficient.

  Referring to FIG. 9, a set composed of a plurality of vocabularies having high co-occurrence degrees constitutes clusters 19 and 20 that are connected to each other by some correlation. For example, a cluster group such as “fire, smoke, high temperature”, “water, pump, fire fighting”, and the like.

  A vocabulary that connects these clusters with a low appearance frequency, which is generally called a hub, is a vocabulary 10 corresponding to the hub (reference numeral 21 in FIG. 9), for example, “fire extinguishing” or “notification”. Such a thing comes out.

  If "fire extinguishing", the response action of fire extinguishing is urged, and if "reporting", the response action of reporting to the fire fighting is encouraged. In other words, if it is simply a fire, it can not be distinguished whether it is a notification of the occurrence of a fire or a fire extinguishing, but by including such highly correlated vocabulary in the keyword, which action is encouraged Can be distinguished.

  That is, although it cannot be distinguished even if it is inferred from the individual keywords of the cluster 19 and the cluster 20 in FIG. 9, it can be narrowed down to the final report or action by inferring from the keyword of the vocabulary 10 (reference numeral 21 in FIG. 9). it can. Therefore, keywords are selected from vocabularies having high correlation between vocabularies or vocabulary clusters using the degree of co-occurrence.

  This can be used not only for keywords in the disaster prevention phase, but also for selecting individual notification keywords, but the difference between the two is whether the scope of the cluster is at the disaster prevention phase level or at the individual notification level. Naturally, there may be a common keyword for both.

  Generally, what appears in common among the attribute keywords of a plurality of notification subclasses included in the disaster prevention phase class is highly likely to be a keyword characterizing the disaster prevention phase.

  Therefore, there is also a method of adding a certain number as a keyword of the disaster prevention phase class from those having a high probability of appearing in common among attribute keywords of a plurality of notification subclasses. Alternatively, there is a way to artificially select keywords that are conceptually common to each other from the keywords of individual report subclasses.

  Here, the common concept is that the level of abstraction is higher. For example, in the case of the contents of the report in FIG. 8, “scrum (failure)” and “control rod insertion” are “plant stop”. “Pump activation” and “ECCS activation” are means for “plant cooling”, and the purpose thereof is higher in abstraction.

  “Plant shutdown” and “plant cooling” are operations for any event, but from the viewpoint of reporting, it is a condition of Article 10 specific events. If these keywords appear in common, they are related to the Article 10 event phase. Can be estimated.

  In this way, the keyword setting method that characterizes the correlation between the message text and the corresponding action is clarified, and by selecting the keyword as a standard, it is possible to automatically extract the keyword using a computer. It is possible to develop an ontology database with high performance.

Next, an operation example when setting a keyword will be described with reference to FIG. In this example, the above-described contents are made more specific and keywords are set in the database 31.
In this case, the behavior predicting unit 35 is provided with a learning function for learning the keyword extracted by the keyword extracting unit 34.
In this corresponding behavior prediction system, as shown in FIG. 10, the process of setting a keyword is roughly divided into four steps. For example, there are a reporting step S300, a disaster prevention phase step S400, a learning step S500, and a setting step S600.

  The basic processing operation is notification step S300, which is performed for the lowest notification subclass. That is, it is assumed that a disaster prevention phase is set for a disaster or a disaster prevention drill of a plant, and a disaster prevention subclass belonging to each disaster prevention phase is set.

  First, the reporting step S300 will be described. For a report sentence belonging to a report subclass of a certain disaster prevention class, the report sentence is read (digitized) in step S301, a natural language processing analysis is performed in step S302, and an appearance frequency of a certain vocabulary as a keyword candidate is obtained in step S303. . As a result of obtaining the vocabulary appearance frequency, if the vocabulary appearance frequency is high and the vocabulary is a proper noun, this vocabulary is set as a report keyword candidate (step S305).

  On the other hand, if the vocabulary is not a proper noun, tf-idf is obtained in step S304, and if this value is high, it is similarly set as a report keyword candidate in step S305. If the co-occurrence degree is obtained in step S306 and this is high, it is determined as a report keyword candidate in step S305 as well.

  In step S307, a cluster is set based on the co-occurrence degree, and a hub is set in step S308 based on the connected vocabulary between clusters. The vocabulary set in the hub becomes a disaster prevention phase keyword candidate in step S309. Repeat the above steps for all notification subclasses. This is the report class step.

  Next, disaster prevention phase step S400 is demonstrated. In this case, the process from step S301 to step S309 is repeated in step S401. Similarly, for each disaster prevention phase, a notification keyword candidate and a disaster prevention keyword candidate are extracted in step S402.

  In addition, keywords that appear in common in a plurality of notification subclasses among the notification keywords are added to the disaster prevention phase keyword candidates in step S403. Repeat the above process for all disaster prevention phase classes.

  The above is the disaster prevention phase class, and when this is finished, one set of learning about one disaster event or one plant disaster prevention training is finished.

  The next learning step S500 is a generalized learning step for general-purpose response to differences between events and plants. For different events and plants, notification step S300 and disaster prevention phase step S400 are performed. Repeat the process.

  This is step S501, and in this process as well, the notification keyword candidate and the disaster prevention phase keyword candidate are set in step S502. In the same manner as in the process of step S403, the common notification keyword is set in step S503. Add to.

  When the learning step S500 is completed in this manner, the report keyword candidates and the disaster prevention phase candidates are gathered, so in the setting step S600, the formal report keywords are narrowed down from the report keyword candidates in the step S601. The official disaster prevention phase keywords are narrowed down from the phase keyword candidates.

  When there are too many keywords, the generalization ability decreases due to over-learning, and the number of keywords is narrowed down to the optimum number from the viewpoint of accuracy and efficiency in order to avoid the deterioration of estimation accuracy and the complexity of inference processing. In narrowing down the keywords, it is assumed to refer to indicators such as tf-idf and cluster degree and expert judgment from the viewpoint of abstraction.

  In this example, an automatic extraction method and automatic learning using a keyword computer that characterizes the correlation between the message sentence and the corresponding action can be performed, and a highly reliable ontology database can be developed.

Next, the flow and behavior of notification will be described with reference to FIGS.
As shown in FIG. 11, it is assumed that there is a flow from the first notification to the fourth notification. For each notification, the disaster prevention phase to which the notification belongs and the notification itself are specified according to the processing steps shown in FIG. As shown in FIG. 5, the identified notification has information on the corresponding action as an attribute, and therefore the relation between the notification and the corresponding action is uniquely determined here.

  Therefore, according to the flow of notification, it is possible to determine, in a time series, the corresponding action and whether or not it has been implemented as in the action situation 25 shown in FIG. In determining the action situation, it is possible to assume a standard action pattern 26 such as a first action, a second action, a third action, a fourth action, a fifth action, etc. in a specific disaster prevention phase.

  Based on such a standard action pattern 26, a time-series anteroposterior relationship between actions is set as an attribute 30, as shown in FIG. These are the behavior before and after the reference, the report elapsed time for the behavior, and the reference elapsed time that is the basis for generating an alarm.

  For example, the pre-standard action of the corresponding action of identifying an injured person is the discovery of the injured person, and the injured person finding report is a corresponding report. After the identification of the injured person, such as the number of injured persons and the degree of injured, the post-standard action is generally the transportation of the injured person and the request for an ambulance necessary for that purpose.

  By setting the correspondence as described above, it can be seen that, for example, the pre-reference action of the third action in FIG. 12 is the second action and the post-reference action is the fourth action.

  If the standard post-reference action is set as attribute information, for example, if a report for the third action is specified, then whether or not a report for the next fourth action is specified within the standard elapsed time is determined. By monitoring, it is possible to monitor whether the third action is correctly performed and whether the next fourth action is correctly requested.

  That is, the response behavior that is an attribute in the ontology database and the response behavior to be implemented in each disaster prevention phase are compared in time series to monitor whether the response behavior is correctly performed. And if the necessary response action is not done by monitoring, the target person of the response action that is the attribute in the ontology database is warned to urge the action, and the response action is not performed to the sender / receiver Report that.

  At the time of behavior monitoring, a standard response action execution time is set in advance, and a preliminary warning for prompting an action is issued before the execution time, and a warning for prompting an action is issued to the corresponding action target person after the execution time.

  In this case, when it is determined that the third action is not performed within the standard time as in the example of FIG. 11, the sender / receiver refers to the corresponding action attribute 28 of the report corresponding to the third action. It is possible to specify 29 and to issue a report or warning that prompts the sender / receiver to take a corresponding action.

  In addition, the table that checks whether the corresponding action is performed or not performed in accordance with the progress of the action is updated in FIG. 11, and the standard action pattern 26 and the comparison 27 are periodically performed. By browsing, it is possible to share information between the persons in charge as to whether the reporting and response actions are progressing correctly.

  In this example, it is possible to support automatic monitoring of a report sentence and corresponding action and information sharing among disaster prevention personnel based on the monitoring.

  In addition, this invention is not limited only to the said embodiment, You may deform | transform a component in the range which does not deviate from the summary in an implementation stage.

  For example, each component may be realized by a program installed in a storage such as a hard disk device of a computer, and the above program is stored in a computer-readable electronic medium: electronic media, and the program is transferred from the electronic medium to the computer. The computer may realize the functions of the present invention by causing the computer to read them. Examples of the electronic medium include a recording medium such as a CD-ROM, flash memory, and removable media. Further, the configuration may be realized by distributing and storing components in different computers connected via a network, and communicating between computers in which the components are functioning.

  DESCRIPTION OF SYMBOLS 1 ... Communication network, 2 ... Notification terminal, 3 ... Corresponding action prediction apparatus, 31 ... Database, 32 ... Reception part, 33 ... Natural language analysis part, 34 ... Keyword extraction part, 35 ... Action prediction part, 37 ... Memory, 38 ... display device, 41 ... basic dictionary, 42 ... special dictionary, 43 ... corresponding behavior correlation table, 51 ... e-mail transmission software.

Claims (2)

Phases in which typical contact reports sent from related parties occur during emergency or training that assumes them are divided into several phases, and each phase is included in the expected actions and notification reports A database that stores keywords in association with each other;
A receiving unit for receiving a communication message transmitted from the related person via a network;
A natural language analysis unit that categorizes character strings obtained by performing natural language analysis of messages received by the reception unit, for each morpheme;
A keyword extraction unit for extracting a keyword having a high appearance frequency or a keyword having a large connection between morphemes from the character string of the message divided by the natural language analysis unit;
Using the keyword extracted by the keyword extraction unit as a key, referring to the database, identifying the phase to which the contact notification belongs, and an action prediction unit for notifying the action to be taken by the responder in the identified phase The corresponding action prediction system characterized by comprising. The behavior prediction unit
The corresponding behavior prediction system according to claim 1, further comprising a learning function for learning a keyword extracted by the keyword extraction unit.

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