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<title cf:type="text"><![CDATA[Editorial department of the Journal of National University of Defense Technology -->计算机科学与技术·信息与通信工程·管理科学与工程]]></title>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Multi-object tracking algorithm for mobile single camera]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202006015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the moving objects in the video sequences collected by the mobile single camera, an online multi-object automatic tracker was focused on research, which was based on the relative motion information and data association strategies. The recovery of the object trajectory was achieved by the relative motion model between the objects, and the object trajectory fragmentation was reduced. The assignment between detection of the current frame and the past trajectories was improved based on the event matching algorithm, which reduced the number of identity conversions during tracking. Experimental results show that the improved algorithm is more accurate than the original algorithm in tracking and positioning the object in the sequences, reducing the number of trajectory fragmentation and identity conversion, and our tracker achieve relative the same performance in the state-of-the-art on the TUD-Campus sequence in the international academic circle.]]></description>
<pubDate>2020/12/2 0:00:00</pubDate>
<category><![CDATA[计算机科学与技术·信息与通信工程·管理科学与工程]]></category>
<author><![CDATA[LI Xingwei, CHEN Huimin, LYU Linjue, GUAN Shaojie]]></author>
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<atom:name>LI Xingwei, CHEN Huimin, LYU Linjue, GUAN Shaojie</atom:name>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Triple-frequency kinematic-to-kinematic ambiguity resolution with BDS/INS tightly-coupled integration]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202006016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the problem that when pseudorange observation noise was high, and the ambiguity calculation of TCAR(three carrier ambiguity resolution) method was unreliable in the condition of kinematic-to-kinematic, a triple-frequency kinematic-to-kinematic ambiguity resolution with BDS/INS tightly-coupled integration was proposed. Replacing the double-difference pseudorange observations in GF(geometry-free) and GB(geometry-based) patterns with the double-difference geometry distances estimated by the tightly-coupled integration system, the method obviously decreased the noise level of the pseudorange double-difference observations and improved the success rate of triple-frequency ambiguity calculation. Simulation results show that, the high-precision position output of BDS/INS tightly-coupled integration improved the accuracy of pseudorange observations by more than 60%. In short-baseline condition, when the pseudorange observation noise is 2 m, the success rate of triple-frequency integer ambiguity calculation by GF-TCAR is 0.73% while 31.25% by GB-TCAR. However, the integer ambiguity calculation success rate by the new TCAR method is beyond 99%. And this new solution can achieve centimeter-level kinematic-to-kinematic relative positioning.]]></description>
<pubDate>2020/12/2 10:56:13</pubDate>
<category><![CDATA[计算机科学与技术·信息与通信工程·管理科学与工程]]></category>
<author><![CDATA[ZHAO Xiubin, ZHU Chujiang, PANG Chunlei, ZHANG Liang, GAO Yujie]]></author>
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<atom:name>ZHAO Xiubin, ZHU Chujiang, PANG Chunlei, ZHANG Liang, GAO Yujie</atom:name>
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<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202006016]]></guid><cfi:id>5</cfi:id><cfi:read>true</cfi:read></item>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Experimental and numerical study on propeller induced vibration of underwater hull]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202006017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To consider the real excitation characteristics of propeller, the measurement experiment of stern fluctuating pressure and underwater hull vibration response induced by propeller in stern wake field was conducted in circulating water channel. The experiment results show that:the fluctuating pressure has the maximum amplitude at BPF(blade-passing frequency), increases with the increase of the propeller load and decreases with the increase of the distance to propeller; the four-blade-propeller has larger amplitude at high wake region after rudders while the five-blade-propeller at low wake region between rudders; the vibration response amplitude at most of the monitor points increases with the propeller load, but there are cases that have less amplitude at BPF and no increase with propeller load; the lateral vibration induced by five-blade-propeller increases while the axis vibration decreases compared with four-blade-propeller; the vibration response amplitude at specific peak frequency presents the 1st order bending mode, and its frequency range relatively agrees with the numerical result of finite element method. The computational fluid dynamics, finite element and modal superposition method were combined to establish a numerical method to evaluate propeller induced vibration response of underwater hull. The comparison between numerical and experiment results illustrates that the numerical results provide a good agreement with the experiment results and are closer to reality than the harmonic response analysis method which uses unit harmonic excitation.]]></description>
<pubDate>2020/12/2 10:56:13</pubDate>
<category><![CDATA[计算机科学与技术·信息与通信工程·管理科学与工程]]></category>
<author><![CDATA[XU Ye, XIONG Ying, HUANG Zheng]]></author>
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<atom:name>XU Ye, XIONG Ying, HUANG Zheng</atom:name>
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<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202006017]]></guid><cfi:id>4</cfi:id><cfi:read>true</cfi:read></item>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Thermo-electro-mechanical vibration analysis of piezoelectric nanobeams embedded in viscoelastic medium based on nonlocal elasticity theory]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202006018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the nonlocal elasticity theory and Hamilton′s principle, the model for thermo-electro-mechanical vibration analysis was developed for a piezoelectric nanobeam embedded in viscoelastic medium. Governing equations of motion and boundary conditions for vibration analysis were derived where thermo-electro-mechanical loadings, viscoelastic foundation, nonlocal effect and piezoelectric effect were considered simultaneously. The transfer function method was employed to obtain the natural frequencies in closed form for the nanobeam with various boundary conditions. A detailed parametric study was also carried out for the effects of nonlocal parameter, boundary conditions and viscoelastic foundation on the vibration of nanobeams. The study demonstrates the accuracy and the efficiency of the developed model for vibration analysis of a complicated multi-physics system comprising nonlocal piezoelectric nanobeams, viscoelastic foundation and thermo-electro-mechanical loadings.]]></description>
<pubDate>2020/12/2 10:56:13</pubDate>
<category><![CDATA[计算机科学与技术·信息与通信工程·管理科学与工程]]></category>
<author><![CDATA[ZHANG Dapeng, LEI Yongjun]]></author>
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<atom:name>ZHANG Dapeng, LEI Yongjun</atom:name>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Reliability analysis approach based on Kriging and advanced first-order second moment method]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202006019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For the problem of structural reliability analysis, an analysis method combining Kriging with AFOSM (Advanced first-order second moment) method was proposed. The traditional AFOSM calculation requires the gradient information of the structural limit state function. It is difficult especially when it deals with the implicit limit state function problem involving the finite element model. The proposed method combined Kriging method and AFOSM iteration fully and effectively. The Kriging method provides the gradient information of limit state function so as to overcome the difficulty of the derivation solution and improve the analysis efficiency of limit state function. Finally, numerical and engineering examples are given to verify the efficiency and feasibility of the proposed method.]]></description>
<pubDate>2020/12/2 10:56:13</pubDate>
<category><![CDATA[计算机科学与技术·信息与通信工程·管理科学与工程]]></category>
<author><![CDATA[YUAN Xiukai, KONG Chongchong, GU Jian]]></author>
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<atom:name>YUAN Xiukai, KONG Chongchong, GU Jian</atom:name>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Holonic-C2 organization decision allocation and evolution method]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202006020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to effectively play the decision-making advantage of C2(command and control) organization′s centralized decision-making and collaborative decision-making, the decision-making assignment problem of Holonic-C2 organization with dynamic ability of decision-making authority was studied. In view of the shortcomings of the subjectiveness of expert fixed weights in group decision making, an expert group selection method based on the combination of expert authority and opinion consistency was proposed. This method improves the objective rationality of multi-attribute decision making. In view of the dynamic evolution of decision allocation, a decision-making evolution mechanism based on multi-stage decision making was proposed. The change of attributes in the front and back stages was considered in this method, and the decision mode transition mode in the adjacent stage was given. The simulation results show that the proposed method can give the ranking of the relatively objective decision-making modes and the multi-stage evolutionary route, which proves the feasibility and effectiveness of the method.]]></description>
<pubDate>2020/12/2 10:56:13</pubDate>
<category><![CDATA[计算机科学与技术·信息与通信工程·管理科学与工程]]></category>
<author><![CDATA[WANG Xun, ZHANG Jieyong, WAN Lujun, JIAO Zhiqiang]]></author>
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<atom:name>WANG Xun, ZHANG Jieyong, WAN Lujun, JIAO Zhiqiang</atom:name>
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