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Dempster-Shafer theory of evidence is widely applied to uncertainty modelling and knowledge reasoning because of its advantages in dealing with uncertain information. But some conditions or requirements, such as exclusiveness hypothesis and completeness constraint, limit the development and application of that theory to a large extend. To overcome the shortcomings and enhance its capability of representing...
An expert system (ES) is a computer system that emulates the decision-making ability of a human expert. And it is designed to solve complex problems by reasoning about knowledge, represented primarily as IF-THEN rules. However, the control accuracy is determined by the complexity of the IF-THEN rules, which are designed according to the practical operating experiences. The higher the control accuracy,...
Approximate reasoning is based on generalized modus ponens (GMP). Its principle is that from an observation different but approximately equal to the rule premise, we can deduce a fact approximately equal to the rule conclusion. However, the deduced fact is not obtained with an arbitrary way. In this paper, we propose a new rule of GMP in linguistic many-valued logic framework with using hedge moving...
This paper studies the linguistic truth value domain based on finite monotonous hedge algebra in an attempt to propose a derivatives system based on hedge moving rules and ∧, ∨, ⊗, ′, → rules based on Lukasiewicz algebra.
Mining area's environmental system safety assessment is the comprehensive measure for the state and development trends of mining area's environmental system, and it is the important basis to take specific measures to control the mining area's environmental system safety. In this paper, under the guidance of the pressure - state - response (Pressure-State-Response, PSR), the mining area's environmental...
Environmental indices (EI) are used as a communication tool to describe overall status of the environmental systems. Due to the uncertainty in the process of determination of EI, a fuzzy evidential method is proposed in this paper. First, the data collected from different sources are modeled as fuzzy numbers. Second, a method to transform fuzzy variables into basic probability assignments is developed...
Temporal reasoning is a very valuable tool to diagnose and control slow processes. Identified trends are also used in data compression and fault diagnosis. Although humans are very good at visually detecting such patterns, for control system software it is a difficult problem including trend extraction and similarity analysis. In this paper, an intelligent trend index is developed from scaled measurements...
This paper investigates the inverse problem of approximate reasoning [to conclude from and ] from different angles. We develop a method to find a solution to the inverse problem by the use of the law of contrapositive symmetry. In the process, generalized modus ponens, generalized modus tollens, and their generating functions are studied extensively. An attempt...
Visual verb is a special type of verb. Between the semantic characteristics of modern Chinese visual verbs exists relation of compatibility or repulsion. Through calculation and analysis of the compatibility degree, we find that, in semantic characteristics, the relation can be "compatibility" or "repulsion", which is determined by the features of visual behavior itself. In addition,...
A specific emergency management contingency plan needs to be created for meeting the emergencies in express industry. In order to achieve the ideal effects at the crucial moment, it becomes vital important to have an accurate evaluation to the current plan. On the basis of the theoretical and empirical investigation, this paper establishes the evaluation criteria of the emergency management contingency...
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