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2012 5th Global Symposium on Millimeter-Waves, GSMM 2012

作者： Hu, Hang Gao, Conghui Yu, Xiaoyang School of Electronics and Information Technology Harbin Institute of Technology Harbin 150001 China College of Measure and Control Technology and Communication Engineering Habrin University of Sience and Technology Harbin 150001 China

ISBN: (纸本)9781467313032

In phased array at subarray level with monopulse technology, generally, analog weighting at element level are adopted for sidelobe suppression of patterns, while digital weighting at subarray level for adaptive processing. This paper studies the sidelobe suppression method for sum and difference beam by using only subarray level weighting instead of analog weighting, which is most of interest for the reduction of hardware cost and complexity. A new approach is presented, which adopts genetic algorithm (GA) to optimize weights vector at subarray level for sum and difference beam, and the encoding scheme, constitution of fitness function, and realization of genetic optimization are also given. Simulation results demonstrate that the proposed method can suppress sidelobe of patterns effectively, especially for sum beam. © 2012 IEEE.

关键词： Genetic algorithms

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Study for generalized sidelobe canceller at subarray level based on householder transformation

Study for generalized sidelobe canceller at subarray level b...

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2012 5th Global Symposium on Millimeter-Waves, GSMM 2012

ISBN: (纸本)9781467313032

Adaptive digital beamforming(ADBF) at subarray level is one of crucial techniques for phased array radar. Generalized sidelobe canceller(GSLC) at subarray level is an effective solution in the presence of array imperfections such as amplitude and phase errors, while the key lies in appropriate blocking matrix(BM) to block desired signal and adaptive weights for suppressing jammers. While at subarray level, using conventional BM will degrade the performance of beam such as that notch deviates for phase errors and signal-to-interference- plus-noise ratio(SINR) loses. This paper presents an implementation for GSLC configuration at subarray level by utilizing Householder transformation to determine BM. Simulation results demonstrate that the proposed method can raise SINR obviously and is insensitive to channel errors even if to phase ones. © 2012 IEEE.

关键词： Signal to noise ratio

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Simulation and spectral analysis of sea wave

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2012 2nd International Conference on Materials Science and Information technology, MSIT 2012

作者： Xu, Jing-Bo Bian, Xin-Qian Fu, Ming-Yu Postdoctoral Research Station of Control Science and Engineering Harbin Engineering University Harbin Heilongjiang 150001 China College of Measure-control Technology and Communication Engineering Harbin University of Science and Technology Harbin Heilongjiang 150080 China Automation College Harbin Engineering University Harbin Heilongjiang 150001 China

ISBN: (纸本)9783037854389

This paper deals with the method of simulating sea wave for decreasing its disturbance in the watercraft navigating. Firstly the ITTC two-parameter spectrum is selected as the power spectrum of sea wave to be simulated. Secondly the selected power spectrum is parted on a prescription composed of drugs of equal amount energy, and the harmonic frequency is determined by calculating the mass center of each section. Each order harmonic is synthesized on the basis of the Longuet-Higgins model in time domain. Finally, the simulation algorithm based on energy in part is presented and the simulated sea wave with time and space are determined. The simulation accuracy arrives at 1.6% compared with the ideal sea wave spectrum by the spectrum analysis of the simulated sea wave in Welch. That testifies the validity of this method and provides the watercraft movement parameters filtering with reliable exciting signals. © (2012) Trans Tech Publications, Switzerland.

关键词： Spectrum analysis

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Microstrip antenna design based on left-handed materials

Microstrip antenna design based on left-handed materials

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2011 International Conference on Business, Economics, and Financial Sciences, Management, BEFM 2011

作者： Chengtian, Song Zhiliang, Song Xi, Pan State Key Labortory of Mechatronical Engineering and Control Beijing Institute of Technology Beijing China Dalian Airforce Communication NCO Academy Dalian China

ISBN: (纸本)9783642279652

An review on the development and extrodinary properties of left-handed materials is first *** on the current research, left-handed materials is applied to the microstrip antenna *** miniaturized antenna are designed by using the left-handed materials, which makes futhur miniaturization of microstrip antenna possible. © 2012 Springer-Verlag GmbH.

关键词： Microstrip antennas

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Ant colony algorithm and genetic algorithm optimization for test vector reordering

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Information technology Journal 2012年第12期11卷 1786-1789页

作者： Shang, Jin Zhang, Liyong College of Measure-Control Technology and Communication Engineering Harbin University of Science and Technology Harbin 150080 China School of Electrical and Information Engineering Heilongjiang Institute of Technology Harbin 150050 China

Power dissipation during testing has been found to be much more than during normal mode due to increased switching activity. Test vector reordering technique helps mitigate this problem as it enables the reduction of switching activity during testing. This study presents a new test vector reordering approach. This approach maps the reordering problem to Traveling Salesman Problem (TSP). A hybrid ant colony algorithm and genetic algorithm is presented to solve this problem. The proposed approach is effective and verified with ISCAS'85 benchmark circuits which shows that yield on an average of about 30.05% reduction in switching activity. © 2012 Asian Network for Scientific Information.

关键词： Genetic algorithms

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Admission control with Elastic QoS for Video on Demand Systems

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International Journal of Automation and computing 2012年第5期9卷 467-473页

作者： Fu-Shou Lin 1 Bao-Qun Yin 1,2 Jing Huang 1 Xu-Min Wu 1 1 Key Lab of Anhui Network communication System and control, University of Science and technology of China, Hefei 230027, China 2 National Network New Media engineering Research Center, Institute of Acoustics, Chinese academy of Science, Beijing 100190, China 1. Key Lab of Anhui Network Communication System and Control University of Science and Technology of China Hefei 230027 China 2. National Network New Media Engineering Research Center Institute of Acoustics Chinese Academy of Science Beijing 100190 China

In network service systems, satisfying quality of service (QoS) is one of the main objectives. Admission control and resource allocation strategy can be used to guarantee the QoS requirement. Based on partially observable Markov decision processes (POMDPs), this paper proposes a novel admission control model for video on demand (VOD) service systems with elastic QoS. Elastic QoS is also considered in resource allocation strategy. Policy gradient algorithm is often available to find the solution of POMDP problems, with a satisfactory convergence rate. Through numerical examples, it can be shown that the proposed admission control strategy has better performance than complete admission control strategy.

关键词： Partially observable Markov decision processes (POMDPs) admission control resource allocation elastic quality of service (QoS) policy gradient

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Research on rapid detection method of protein content in milk dilute solution

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International Journal of Advancements in Computing technology 2012年第15期4卷 179-187页

作者： Ding, Guochao Liu, Yanlong Zhou, Zhen Xi, Yang Gao, Yunli College of Measure-control Technology and Communication Engineering Harbin University of Science and Technology Harbin 150080 China College of Information Technology Heilongjiang Bayi Agricultural University Daqing 163319 China

This paper puts forward a method to detect milk protein contents quickly. In this paper, the transmitted and scattered light are detected first, and we choose the position for detection of the scattered light, and dissolve the protein into small molecules through the fast-dissolving liquid, so we can get the content of fat by establishing a model of the ratio of scattered intensity to transmitted intensity. After detecting the milk dilute solution including both protein and fat, the protein content is obtained by establishing the correlation model. Simulation and experimental results show that the method of associated scattering put forward in this paper is entirely feasible, and the maximum error compared with the calibration values is 2.6%, which is fully compliance with the precision milk protein detection. The method is intuitive and rapid, which is suitable for measurement of milk protein online.

关键词： Proteins

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A cloud-based collaborative manufacturing resource sharing services

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Information technology Journal 2012年第9期11卷 1258-1264页

作者： Ding, Bo Yu, Xiao-Yang Sun, Li-Juan School of Computer Applied Techniques Harbin University of Science and Technology Harbin 150080 China School of Measure-Control Technology and Communication Engineering Harbin University of Science and Technology Harbin 150080 China

The spring up of cloud computing gives product manufacturing a new solution and chance to realize resource sharing and cooperative work between enterprises for global manufacturing. A collaborative manufacturing resource sharing platform is built based on cloud services, which implements to effectively describe information, resources and knowledge during manufacturing process by abundant semantics. The cloud services are the combination of cloud computing and ontology technique. Cloud computing utilizes virtualization technology to encapsulate collaborative manufacturing resources as services to shield the distribution of collaborative manufacturing. The cloud service integration model is built based on ontology technique. The cloud service integration model implements the uniform representation of heterogeneous information and helps to shield the heterogeneity of manufacturing resources systematically. Finally, a case study of the whole design of a decelerator is presented to validate the feasibility and effectiveness of the approach. © 2012 Asian Network for Scientific Information.

关键词： Cloud computing

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Time frequency analysis for action conversion characteristics of surface electromyography signals

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ICIC Express Letters, Part B: Applications 2012年第5期3卷 1041-1046页

作者： You, Bo Zhao, Hanqing Huang, Ling Zhou, Lina Institute of Automation Harbin University of Science and Technology No. 52 Xuefu Road Nangang Dist. Harbin 150080 China Academy of Measure-Control Technology and Communication Engineering Harbin University of Science and Technology No. 52 Xuefu Road Nangang Dist. Harbin 150080 China

The electromyography (EMG) pattern recognition and classification of intentional movements for control of multifunctional prostheses have adopted steady state data. Actually, most of human body's movements are continuous, so the action conversion points are determined for continuous movements of human hand in this study. Ten healthy adults (5 men and 5 women;25±3 year) participated in the EMG signals measurement experiments. Surface EMG signals were obtained from flexors carpi of forearm. Four singles and two continuous actions are designed in this experiment. The short-time energy time frequency analysis is employed to determine action conversion points. In the experiment, subjects do not need to train. The result suggests that the short-time energy time frequency analysis is suitable for determination of continuous action conversion points. This method is promising and simple, and it is expected to be employed in identification of continuous hand actions. © 2012 ICIC International.

关键词： Electromyography

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Distribution-aware mutation analysis

Distribution-aware mutation analysis

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36th Annual IEEE International Computer Software and Applications Conference Workshops, COMPSACW 2012

作者： Sun, Chang-Ai Wang, Guan Cai, Kai-Yuan Chen, Tsong Yueh School of Computer and Communication Engineering University of Science and Technology Beijing Beijing China Department of Automatic Control Beijing University of Aeronautics and Astronautics Beijing China State Key Laboratory of Computer Science Institute of Software Chinese Academy of Science Beijing China Facuity of Information and Communication Technologies Swinburne University of Technology Melbourne VIC Australia

ISBN: (纸本)9780769547589

Mutation analysis is widely employed to evaluate the effectiveness of various software testing techniques. In most situations, mutation operators are uniformly applied to the original programs, while the faults tend to be clustered in practice. This may result in the inappropriate simulation of faults, and thus cannot deliver the reliable evaluation results. To overcome this, we propose a distribution-aware mutation analysis technique and conducted empirical studies to investigate the impact of the mutation distribution on the effectiveness evaluation of testing techniques. As an illustration, we select the commonly practiced random testing technique and two versions of dynamic random testing techniques and apply them to testing Web services. Results of empirical studies suggest that the mutation distribution significantly affects the evaluation results. This observation further indicates that the effectiveness of testing techniques previously evaluated with the uniform mutation analysis needs further realignments. © 2012 IEEE.

关键词： Software testing

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