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As a typical user activity based model in search engines, click model is currently the mainstream approach to describe and analyze user behaviors when handling a number of search-related applications, such as automated ranking alternations, search quality metrics, and online advertising. However, most of the existing work in this literature only consider click through data but ignore other aspects...
Under the assumption that the degradation data obey the same path model form, a degradation outlier test method based on path model is presented in this paper. Through testing whether the model parameters are equal for two groups of degradation data, the abnormal data can be distinguished. The critical regions are given based on Chow test. Furthermore, a new analysis method of abnormal degradation...
In the teaching of information and computing science specialty which was adjusted by the mathematic and applied software specialty which is widespread teachers focus on teaching theory instead of practice, its teaching content and method is relatively backward, teaching methods and evaluation methods does not adapt to training ability and improving innovation. Build the open practice teaching system...
Considering the decision-making problem for UCAV cooperative attack on multiple aerial targets, this paper analyzed the air combat situation superiority, established the UCAV angel superiority model and speed superiority model. Taking into account the target value and the ability of our UCAV attacks on targets, we established the attacks income model. Considering air superiority and attack income...
For the series of U-channel section, which has similar structure, it is easy to adjust the geometric model of U-channel section by using parametric design method, the efficiency is improved and the time for product design will be shortened greatly. By using the ANSYS Parametric Design Language (APDL), the FEA process including creating FEA model and analysis steps is discussed with the finite element...
Grid division in finite element is very important to carry out simulating analysis, it directly affects the following calculation accuracy for analysis result .In view of this, and this article uses four kinds of different ways of grid division to mesh gear-tooth root spot during the course of finite element analysis of gear meshing. Through drawing up and comparing the von mise tendency chart of...
Due to the decline of the viability and battle effectiveness of the electronic countermeasure armored vehicle caused by intense infrared radiation (IR), the temperature model is built for the IR characterizations of moving target. While taking the effect of radiation, convection and heat transfer into consideration, the mathematic description and simulation of the temperature model are carried out...
An integrative fuzzy set pair model, established by integrating fuzzy assessment and set pair analysis, was introduced to assess the land ecological security states. The approximate degree of land ecological security to the optimal standard set was calculated to describe the security level by combining multiple indices. The indices and weights were determined by Delphi and fuzzy AHP (Analytic Hierarchy...
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