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Rule-based Chinese structured financial event default complementation extraction method
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A structured and default technology, applied in the field of information extraction, can solve the problem of less research considering the default completion of event components, and achieve good precision and recall.
Pending Publication Date: 2021-05-04
万齐智 +3
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[0005] Due to the limitations of the above methods, and few studies have considered the problem of event component default completion, a simple event default component completion method with as little manual labeling data as possible is needed to improve the extracted structure. The use value of the event
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Embodiment 1
[0088] The process of the present invention is as figure 1 As shown, the specific process is as follows.
[0089] 1. Four common default structures
[0090] For the default in Chinese language, there are not many research results, and there is no uniform standard for the definition and scope. With the introduction of the "three planes" theory (grammar, semantics, and pragmatics) in Chinese grammar, grammar scholars have the following three basic understandings of default from the perspective of cognition.
[0092] B. Semantic structural definition: Refers to the semantic omission where the meaning that should be said is not said.
[0093] C. Pragmatic communication definition: refers to the pragmatic omission required by the language environment. Among them, the language environment involves a wide range, which can be the ...
example 1
[0100] Example 1. "The Prime Minister of a certain country makes concessions and considers the guarantee agreement of other countries." This example includes event ET1 (a country's prime minister, concession,) and event ET2 (, consideration, another country's guarantee agreement). Among them, the simple subject component "Prime Minister of a certain country" in event ET1 is the subject of event ET2, so this example is a simple default.
[0101] AB. Combination Default: A combination as a whole as a component of other events.
example 2
[0102] Example 2. "Oil prices have been hit hard again, dragging down the futures market." This example is the combined default. Among them, the event ET3 (oil price, suffered, hit) as a whole is the subject of the missing "drag" in the event ET4 (, dragged, futures market).
[0103] B. Preposition-induced default: Some components induced by prepositions are missing, that is, there may be no default in syntactic structure, but some components induced by prepositions are missing semantically.
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Abstract
The invention discloses a rule-based Chinese structured financial event default complementation extraction method, belongs to the technical field of information extraction, and provides four common default structures in combination with the theoretical definition of'three planes' of default; for various default structures, ten event component default complementing rules are designed by analyzing syntax and semantic characteristics in the financial field and syntax and semantic dependency analysis event graph, complementing of event default components is achieved, and the problem that a large number of extracted event components are missing is solved. According to the understanding, the method is the first rule-based Chinese structured financial event default complementation extraction method, manual data annotation is not needed, and the complementation extraction accuracy and recall rate are relatively high.
Description
technical field [0001] The invention relates to the technical field of information extraction, in particular to a rule-based default complement extraction method for Chinese structured financial events. Background technique [0002] Facing the huge data generated every day, how to dig out valuable knowledge from these data is of great significance. As an event extraction subfield of information extraction, the extracted content can help event users make more reasonable judgments and decisions. In the field of finance and economics, government departments can use the extracted events to predict stock trends and provide more powerful support for regulating the market. The field of finance and economics focuses on what kind of behavior and action the event will bring, and what kind of impact it will bring. Subject-verb-object structured financial events. However, due to the characteristics of many short sentences, multiple verbs, and multiple omissions in the Chinese languag...
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