Qingliang Chen

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This paper presents a logic of knowledge, belief and certainty, which allows us to explicitly express the knowledge, belief and certainty of an agent. A computationally grounded model, called interpreted <i>KBC</i> systems, is given for interpreting this logic. The relationships between knowledge, belief and certainty are explored. In particular, certainty(More)
We present an approach to the verification of temporal epistemic properties in synchronous multi-agent systems (MAS) via bounded model checking (BMC). Based on the semantics of synchronous interpreted system, we extend the temporal logic <i>CTL</i>* by incorporating epistemic modalities and obtain the so-called temporal epistemic logic <i>CTL*K.</i> Though(More)
Traditional knowledge reasonings rely on the general theorem provers and may suffer the state explosion problem and can only deal with toy examples. A more concrete model of knowledge called knowledge structure has been introduced by us (Su et al., 2004), which presents a BDD-based approach for computing knowledge and shows great improvement. But this(More)
We developed a highly sensitive reverse transcription and multiplex real-time PCR (rtPCR) assay that can identify five viruses, including six genogroups, in a single reaction: norovirus genogroups I and II; sapovirus genogroups I, II, IV, and V; human rotavirus A; adenovirus serotypes 40 and 41; and human astrovirus. In comparison to monoplex rtPCR assays,(More)
This paper introduces a new methodology that uses knowledge structures, a specific form of Kripke semantics for epistemic logic, to analyze communication protocols over hostile networks. The paper particularly focuses on automatic verification of authentication protocols. Our approach is based on the actual definitions of a protocol, not on some(More)
Web service protocols are designed in XML formats so the message structures within are quite different from the conventional protocols. Therefore, the traditional formal verification techniques which have gain substantial achievements in practice, cannot be applied directly to them because their underlying models are written in Alice\Bob-style descriptions(More)
The standard Kripke semantics of epistemic logics has been applied successfully to reasoning communication protocols under the assumption that the network is not hostile. This paper introduces a natural semantics of Kripke semantics calledknowledge structure and, by this kind of Kripke semantics, analyzes communication protocols over hostile networks,(More)