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<title cf:type="text"><![CDATA[Editorial department of the Journal of National University of Defense Technology -->信息与通信工程·物理学·计算机科学与技术]]></title>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Effects of estimation errors of the secondary path on the Fx-Newton algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Estimation of the secondary path model is required in the implementation of the Fx-Newton algorithm. Aiming at the problem that errors exist in the estimation of the secondary path model in the active-passive vibration isolation engineering application, providing that the input signal is a sine signal, the structure model of the Fx-Newton algorithm was established, considering the error of the estimation of the secondary path model. Stability condition of the Fx-Newton algorithm was deduced. Effects of the amplitude and phase errors on the stability and convergence of the Fx-Newton algorithm were elaborated. Finally, simulations for a two-degree-of-freedom active-passive vibration isolation model were conducted and the theoretical analysis results were verified.]]></description>
<pubDate>2020/1/19 0:00:00</pubDate>
<category><![CDATA[信息与通信工程·物理学·计算机科学与技术]]></category>
<author><![CDATA[ZHANG Neng, HE Lin, LI Yan, WANG Yingchun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Neng, HE Lin, LI Yan, WANG Yingchun</atom:name>
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<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001018]]></guid><cfi:id>10</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[Analysis of interference mechanism and suppression requirement for co-site FM and AM systems]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Using amplitude modulation and frequency modulation transceivers as an object of study, a precise modeling of the nonlinearity of front-end low noise amplifier of the co-site receiving station was presented, the interference suppression requirements for the amplitude modulation and frequency modulation radios were analyzed, and the analytical model was verified by numerical simulation. The results show that the proposed analytical model is more accurate than the existing ones. In addition, when the interference power, the useful signal power and the noise power are the same, the requirement of interference suppression of the amplitude modulation communication system is higher than that of the frequency modulation communication system.]]></description>
<pubDate>2020/1/19 0:00:00</pubDate>
<category><![CDATA[信息与通信工程·物理学·计算机科学与技术]]></category>
<author><![CDATA[ZHAO Kui, WANG Qing, MENG Jin, TANG Jian, ZHANG Lei〖JZ]]></author>
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<atom:name>ZHAO Kui, WANG Qing, MENG Jin, TANG Jian, ZHANG Lei〖JZ</atom:name>
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<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001019]]></guid><cfi:id>9</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design of a novel MWC wideband digital receiver based on the polyphase structure]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new compressed sampling digital receiver based on polyphase MWC structure was proposed to intercept wideband IF(intermediate frequency) signal. The new receiver structure includes three modules:serial parallel conversion, parallel multiplication and polyphase filtering. With the same multiplier resources, the working rate of the new receiver structure is much lower than that of the existing MWC structure. Simulation result verifies the correctness of this new structure. The design lays a foundation for the physical realization of the MWC discrete compressed sampling digital receiver on the FPGA(field programmable gate array) and makes the whole receiver structure more practical in engineering application.]]></description>
<pubDate>2020/1/19 0:00:00</pubDate>
<category><![CDATA[信息与通信工程·物理学·计算机科学与技术]]></category>
<author><![CDATA[CHEN Tao, CAI Xingpeng, PAN Dapeng]]></author>
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<atom:name>CHEN Tao, CAI Xingpeng, PAN Dapeng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001020]]></guid><cfi:id>8</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Degradation and failure detection technology on strain balance measuring circuit]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the degradation and failure caused by vibration, temperature cycling and etc in strain balance′s measuring circuit (Wheatstone bridges), a detection method was presented. In the method, the bridge was driven on different nodes at different periods and the responses were measured. The bridge′s parameters were calculated on the basis of the theoretical calculation, and its failure was detected on the basis of the clustering method. A principle prototype was developed and the experiment research was conducted. Experiment results show that the presented method is effective, and it can indeed detect the failure and its test accuracy of bridge resistance can reach 0.2‰. The designed prototype realizes the auto-detection of degradation and failure of strain balance measuring circuit, which costs less time consumption than traditional test method and lifts the available time of the wind tunnel test.]]></description>
<pubDate>2020/1/19 0:00:00</pubDate>
<category><![CDATA[信息与通信工程·物理学·计算机科学与技术]]></category>
<author><![CDATA[WANG Nantian, XU Xiaobin, MA Xiaoyu, WANG Xiong, TONG Shuai]]></author>
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<atom:name>WANG Nantian, XU Xiaobin, MA Xiaoyu, WANG Xiong, TONG Shuai</atom:name>
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<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001021]]></guid><cfi:id>7</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[Ship corrosion electric field based on rotating point charge model]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To research the reason why the shaft-rate electric field cannot be completely eliminated and the wave curve produced by the electrostatic field in the actual measurement, a modeling method based on rotating point charge was proposed to study the corrosion electric field of ships. The Hankel transform was used to approximate the electric field generated by point charges in the three-layer medium, the curves of induced electric field changing with time, propeller radius and water surface distance under certain rotational speed were obtained, and the correctness of the theoretical results was verified by experiments. The results showed that the induced electric field is a part of the corrosion electric field of ship, and the frequency of induced electric field is the same as the speed of propeller at a certain speed, and the amplitude of that frequency decreases with the increase of the radius of propeller and the distance from the water surface.]]></description>
<pubDate>2020/1/19 0:00:00</pubDate>
<category><![CDATA[信息与通信工程·物理学·计算机科学与技术]]></category>
<author><![CDATA[JI Dou, ZHANG Jianchun, WANG Xiangjun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JI Dou, ZHANG Jianchun, WANG Xiangjun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001022]]></guid><cfi:id>6</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[Analysis of dynamic resistance and dynamic hardness test of metal target material]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Experiments on 45 steel with high-velocity impact were carried out in order to study the target resistance. Then the influence of impact velocity and target parameters on the penetration resistance was analyzed by the calculation model. Also, the DOP (depth of penetration) of different projectiles penetrating 45 steel targets were studied based on the hydrodynamic penetration model. It was shown that the experimental results of penetration resistance based on the material dynamic hardness test method agrees well with the theoretical calculation results of hydrodynamic penetration model. Simultaneously, with the increase of impact velocity, the target resistance reduces from 5.13 GPa to 3.7 GPa. Also, the target resistance shows linear trend increase with the increase of the dynamic yield strength of targets. The DOP calculated by the hydrodynamic penetration model agrees well with the corresponding experimental data. All of these proved that the method to obtain dynamic resistance is feasible, thus can provide a reference for hypervelocity penetration dynamics research.]]></description>
<pubDate>2020/1/19 0:00:00</pubDate>
<category><![CDATA[信息与通信工程·物理学·计算机科学与技术]]></category>
<author><![CDATA[LIU Chuang, ZHANG Xianfeng, HUANG Changqiang, DING Li, CHEN Haihua, WANG Jipeng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Chuang, ZHANG Xianfeng, HUANG Changqiang, DING Li, CHEN Haihua, WANG Jipeng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001023]]></guid><cfi:id>5</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Optimum fusion of marine environment monitoring parallel system]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The functional redundancy between multiple marine environmental monitoring systems leads to resource waste and unnecessary capital investment. Therefore, the systems should be integrated optimally into an organic whole to save resources and costs of marine environmental monitoring. In light of this, the Entropy method was introduced on the basis of linear programming and the marine environmental monitoring system was divided into different modules according to functions. Taking cost and efficiency index as the main object and through reasonable allocation, the construction cost can be reduced as far as possible while ensuring that the monitoring capability after optimization and integration is not reduced.]]></description>
<pubDate>2020/1/19 0:00:00</pubDate>
<category><![CDATA[信息与通信工程·物理学·计算机科学与技术]]></category>
<author><![CDATA[SU Zhendong, YANG Ruiping, WANG Feiyue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SU Zhendong, YANG Ruiping, WANG Feiyue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001024]]></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[Consensus of discrete time second-order multi-agent systems with spatial coordinates coupling and processing delay]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The asymptotic behavior was determined in terms of the topological structure of the system, the step length and the rotation angle of the corresponding rotation matrix. Some necessary and sufficient conditions for the multi-agent systems to reach second-order consensus were found. It was shown that the asymptotic consensus appears when 0 is a simple eigenvalue of the Laplacian matrix, the step length and the rotation angle is less than the critical value which was determined by an algebraic equation. Some numerical simulations were presented to demonstrate the theoretical results. Some cases on the influence of characteristic parameters on second-order consensus were designed, which showed that the conclusion of characteristic parameters can provide important criterion and theoretical support for the control theory.]]></description>
<pubDate>2020/1/19 0:00:00</pubDate>
<category><![CDATA[信息与通信工程·物理学·计算机科学与技术]]></category>
<author><![CDATA[NIE Fen, DUAN Xiaojun, LIU Yicheng]]></author>
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<atom:name>NIE Fen, DUAN Xiaojun, LIU Yicheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001025]]></guid><cfi:id>3</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[Image semantic segmentation of weakly supervised model with bounding box annotations data]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For the pixel level marked data of image segmentation is time consuming and expensive, the image segmentation under the weak supervised model with bounding box annotations was studied. The high-resolution pixel features were extracted by a pyramid densely sampled fully convolution network, and then the weakly supervised data by the GrabCut algorithm was transformed. Finally, the image features and the labeled data were jointly trained. A model of weakly supervised image semantic segmentation based on fully convolution network was constructed and verified on public data set. Experiments show that the constructed weak supervised model has a better segmentation effect compared with DET3-Proposed model, expectation-maximization model and Bbox-Seg model.]]></description>
<pubDate>2020/1/19 0:00:00</pubDate>
<category><![CDATA[信息与通信工程·物理学·计算机科学与技术]]></category>
<author><![CDATA[XU Shukui, ZHOU Hao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Shukui, ZHOU Hao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001026]]></guid><cfi:id>2</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[Simulation on self-organization behaviors of fish school based on reinforcement learning]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Self-organizing behaviors are widespread in nature. In order to simulate self-organizing behaviors of the fish school through learning, the fish school simulation environment model, the agent model and the reward mechanism were built, and a multi-agent reinforcement learning approach based on Hebbian trace and actor-critic framework was proposed as well. This approach uses Hebbian trace to enhance the swimming strategy learning with memory ability and realizes the distributed learning of multi-agent based on the homogeneous hypothesis. The simulation results show that the proposed approach can be applied to self-organizing behaviors learning of the fish school in the scenarios of leader-follower, autonomous wandering and navigation. Moreover, the characteristics of the fish school based on learning methods is similar to that based on Boids rules.]]></description>
<pubDate>2020/1/19 0:00:00</pubDate>
<category><![CDATA[信息与通信工程·物理学·计算机科学与技术]]></category>
<author><![CDATA[YANG Huihui, HUANG Wanrong, AO Fujiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Huihui, HUANG Wanrong, AO Fujiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202001027]]></guid><cfi:id>1</cfi:id><cfi:read>true</cfi:read></item>
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