An Event Ontology Model Research for Environmental Pollution Emergencies

Introduction

Environmental emergency is a frequent occurrence of a series of emergencies, it includes a variety of pollution incidents (such as haze, drinking water pollution, nuclear material leakage, factory sewage and other pollutants), and a series of social events were caused by pollution events (Such as group events caused by chemical projects, snapped up drinking water and masks, etc.), a great impact was made on social stability. These events are published through news reports or through Internet users in Internet applications such as forums, microblogs, and WeChat, these often lead to intense discussion by network users, they in turn will influence the real world in the discussion and evolution of the Internet. The Environmental Emergency Response System is used to collect and process information on various events, these are associated with pollution events from the Internet, and environmental managers and emergency response departments are assisted to monitor and analyze emergencies and take effective measures in a timely manner, it is very necessary (Oltramari A. & Cranor L.F., 2014; Donohue B. &Jensen M.D., 2018; Ray P.P. & Mukherjee M.,2017). The framework method (Liao Z. L. & Liu Y. H., 2009) or the network model (Shao Q. & Weng W. G., 2009) are generally used in the traditional environmental emergency alarm system to describe the emergency event information. The framework method is used to describe the incident, this has a good integrity, but it cannot express the dynamic process of emergencies, and it cannot formalize the knowledge, it cannot support strict reasoning. The network models are used to describe emergencies, although it can describe the state of event occurrence process migration, but the internal structure of the incident cannot be described, but also for the semantic relations between events (especially non-classification relationship) is also a lack of corresponding representation. The ontology representation of emergent event information is used and the reasoning warning is realized by the ontology method, they are new methods in recent years (Jihan S H &Segev A.,2014; Wang T.& Wang Y. Z.,2012). The concept of environmental emergencies can be classified. Based on the ontology formal basis of descriptive logic, the emergencies are achieved in the semantic level of uniform expression, so as to achieve knowledge sharing and interoperability. Therefore, it is becoming increasingly important to establish the relevant ontology in the field of environmental emergencies, it is an indispensable part of the pollution alarm system. However, the conceptual centered traditional ontology has many drawbacks in constructing the ontology knowledge of the emergency area:

• 1.

  Concept Discrete Issues: The concept of emergencies and the participants, places and times of emergencies do not exist as an organic whole, so there is a lot of conceptual classification in the process of constructing ontology;

• 2.

  The Traditional Ontology: Often easy to ignore the dynamics of emergencies, such as it is difficult to describe the sudden changes in events with the time and it is presented by the different states;

• 3.

  The Relationship: Single between the traditional ontology concept, it cannot fully describe the semantic relations between events, it results in insufficient reasoning ability.