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This commentary derives a new exact closed-form expression for the outage probability of an infrastructure-based multi-antenna decode-and-forward relaying system in the absence of direct link, as considered by Katiyar and Bhattacharjee . Our analysis aims to provide a more realistic modeling for the cooperative system under consideration.
The domain knowledge has a direct impact on the result of question - answering (Q & A) in the restricted domain question answering system (QA). In this paper, a method of answer extraction for domain Chinese question-and-answer (Q&A) is proposed, which based on the analysis of interrogative sentence and the answer type, carrying on the text retrieval with the help of the domain knowledge and...
Computational verb rules are efficient tools to represent dynamical experiences of a system in the form of natural languages. In this paper, a face-to-face collision resolving model based on an ultrasonic blind navigation system is built. The computational verb rule bases are constructed for the collision resolution and their validation is showed.
The probability of a conventional event that consists of a static verb such as be, stay, remain and its contexts can be easily found. However, to derive the probability of a verb event stated by a non-static verb is not as simple as conventional events. In the paper, we introduce a type of evolving function called observation function and address a measure to attain the probability of the verb event...
The phase of scattering fields by targets is studied using the computation accuracy results of finite element-boundary integral-multilevel fast multipole algorithm (FE-BI-MLFMA) simulation, the high frequency method, and the analytical solution method. Series of numerical experiments proved that hybrid FE-BI-MLFMA technique is not only accurately computes the amplitude of scattering fields but also...
The semantic structure of scene is important information used for interpretation of object behavior or event detection in video surveillance system. In this paper, we propose an automatic method for learning models of semantic region by analyzing the trajectories of moving objects in the scene. First, the trajectory is encoded to represent both the position of the object and its instantaneous velocity...
In document retrieval, query words expansion is normally based on semantic relation of query words. While using natural language questions to retrieve documents, because of more abundant semantic relation of question than that of query words, the precision can be improved by expanding query according to question characteristics. This paper puts forward a query expansion method for answering document...
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