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2012 International Conference on Computer Science and Service System, CSSS 2012

作者： Chen, Hui Ju, Yongfeng School of Electronic and Control Engineering Chang'An University Shaanxi Xi'an China Shaanxi College of Communication Technology Shaanxi Xi'an China

ISBN: (纸本)9780769547190

In wireless Ad Hoc network, the lower nodes transmitting interference to achieve the control of network conflict is one of the targets of network topology control. Based on the analysis of Ad Hoc network model and network interference model, this paper proposes the node interference model and the link interference model, and proposes a minimize link interference topology control algorithm with t-spanner. Simulation results show that the algorithm can eliminate the bottleneck link, reduce link interference, thus improving network performance. © 2012 IEEE.

关键词： Topology

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Research on MANET routing algorithm based on ant colony algorithm

Research on MANET routing algorithm based on ant colony algo...

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2011 WASE Global Conference on Science engineering, GCSE 2011

作者： Ju, Yongfeng Chen, Hui School of Electronic and Control Engineering Chang'An University Shaanxi Xi'an China Shaanxi College of Communication Technology Shaanxi Xi'an China

ISBN: (纸本)9783037852903

This paper proposed a new Ad Hoc dynamic routing algorithm, which based on ant-colony algorithm in order to reasonably extend the dynamic allocation of network traffic and network lifetime. The Algorithm choose path according transmission latency, path of the energy rate, congestion rate, dynamic rate. The Algorithm update the routing table by dynamic collection of path information after path established. The analyse shows that algorithm increases the network throughput, reduces the average end-to-end packet transmission latency, and extends the network lifetime, achieves an improving performance.

关键词： Ant colony optimization

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Study on urban intersection traffic flow forecasting and traffic signal control

Study on urban intersection traffic flow forecasting and tra...

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2011 WASE Global Conference on Science engineering, GCSE 2011

作者： Ju, Yongfeng Wei, Xiaowei School of Electronic and Control Engineering Chang'an University Shaanxi Xi'an China Shaanxi College of Communication Technology Shaanxi Xi'an China

ISBN: (纸本)9783037852903

Short-traffic flow forecasting is an important part of ITS, and its accuracy and real-time is directly related to the effect of traffic control and traffic induce. Gathering and analyzing the realtime data of urban road network, short-time traffic flow forecasting could estimate the state of traffic flow for a few minutes in future and provide support to intelligent transportation control, so it is one of the important premise for ITS.

关键词： Traffic signals

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Impacts of subsidy policies on vaccination decisions in contact networks

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Physical Review E 2013年第1期88卷 012813-012813页

作者： Hai-Feng Zhang Zhi-Xi Wu Xiao-Ke Xu Michael Small Lin Wang Bing-Hong Wang School of Mathematical Science Anhui University Hefei 230039 China Department of Electronic and Information Engineering Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong China Institute of Computational Physics and Complex Systems Lanzhou University Lanzhou 730000 China College of Information and Communication Engineering Dalian Nationalities University Dalian 116605 China School of Mathematics and Statistics University of Western Australia Crawley Australia Adaptive Networks and Control Laboratory Department of Electronic Engineering Fudan University Shanghai 200433 China Department of Modern Physics University of Science and Technology of China Hefei 230026 China

To motivate more people to participate in vaccination campaigns, various subsidy policies are often supplied by government and the health sectors. However, these external incentives may also alter the vaccination decisions of the broader public, and hence the choice of incentive needs to be carefully considered. Since human behavior and the networking-constrained interactions among individuals significantly impact the evolution of an epidemic, here we consider the voluntary vaccination on human contact networks. To this end, two categories of typical subsidy policies are considered: (1) under the free subsidy policy, the total amount of subsidy is distributed to a certain fraction of individual and who are vaccinated without personal cost, and (2) under the partial-offset subsidy policy, each vaccinated person is offset by a certain amount of subsidy. A vaccination decision model based on evolutionary game theory is established to study the effects of these different subsidy policies on disease control. Simulations suggest that, because the partial-offset subsidy policy encourages more people to take vaccination, its performance is significantly better than that of the free subsidy policy. However, an interesting phenomenon emerges in the partial-offset scenario: with limited amount of total subsidy, a moderate subsidy rate for each vaccinated individual can guarantee the group-optimal vaccination, leading to the maximal social benefits, while such an optimal phenomenon is not evident for the free subsidy scenario.

关键词： Impacts policies decisions Prophylactic vaccination subsidy Contact networks Policies

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Development of a novel system based on the simultaneous measurement of physiological variables for safer driving and general daily healthcare

Transactions of Japanese Society for Medical and Biological ...

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Transactions of Japanese Society for Medical and Biological engineering 2012年第2期50卷 227-236页

作者： Yamakoshi, Takehiro Matsumura, Kenta Hanaki, Shota Ikarashi, Akira Rolfe, Peter Lee, Jihyoung Yamakoshi, Yasuhiro Hirose, Hajime Yamakoshi, Ken-Ichi Graduate School of Natural Science and Technology Kanazawa University Japan School of Mechanical Engineering College of Science and Engineering Kanazawa University Japan Department of Medical Engineering Aino University Japan Department of Automatic Measurement and Control Harbin Institute of Technology Japan Yu.sys Corporation Japan Department of Business Administration Kinjo College Japan

The long term goal of our research is to develop an in-car health screening instrument, based on a novel approach for physiological measurement, in order to contribute to much-needed efforts aimed at achieving safer driving. We describe here a feasibility study in which a system was constructed to derive cardiac indices non-invasively and simultaneously using a finger cuff. Specifically, the instrument measures blood pressure (BP), pulse rate (PR), normalized pulse volume (NPV) reflecting alpha-adrenergic sympathetic activity, and finger-artery elasticity index (FEI). The instrument's measurement process has two phases:firstly, cuff pressure is maintained at 30 mmHg to measure the NPV and PR;secondly, whilst applying a gradual change in counter-pressure, the BP and FEI are measured by application of the volume-oscillometric method. We tested a prototype instrument in 5 healthy male and female volunteers (age 21, 22, 36, 37, 49 years) during two weeks day-to-day living, including a 33-hour period of total sleep deprivation as physiological challenge. The results indicated that with sleep deprivation there appear to be relatively large physiological changes. In conclusion, the prototype system we have developed has allowed the periodic collection of physiological data in a convenient and expeditious way without any failure, demonstrating the possibility to detect an adverse effect on health. Further investigations will be needed in a larger group of subjects with a variety of real environmental conditions.

关键词： Blood pressure

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Multiple watermarking for image authentication based on visual perception information

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International Journal of Advancements in Computing technology 2012年第19期4卷 545-552页

作者： Yan, Yixin Yu, Pengpeng Liang, Yinqiao Zhang, Xiaobing College Measurement Control Technology and Communication Engineering Harbin University of Science and Technology Harbin 150080 China

In this paper, we proposed a novel multiple watermarking scheme, in which a robust watermark and a semi fragile watermark were simultaneously embedded for the image authentication. On one hand, a robust watermark carrying visual perception characteristics was embedded into the low -frequency band of wavelet for image authentication. On the other hand, a semi-fragile watermark containing a significant two value image was embedded into the Intermediate frequency of wavelet for tamper location. If image restoration was needed, we could also repair the image in some extent according to perception information carried by robust watermark. The experimental results show that our robust watermark algorithm was robust to the normal image operation (geometric transformation, wave filtering and compression with loss for example). And our semi-fragile watermark was only sensitive with malicious operation whose value was higher than the threshold value, in the same time it could make the tamper localization within the range of certain precision. In addition, Visual perceptual information was set as image authentication standard in our scheme, the experimental results proved that it was much better than previous ones whose standard was the variation of data bit of the image, and this advantage also assured our algorithm flexible application in practice.

关键词： Image reconstruction

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Sidelobe suppression approach at subarray level for sum and difference beam without analog weighting

Sidelobe suppression approach at subarray level for sum and ...

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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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The Study of Design for Testability on Analog Circuit Based on Boundary-Scan

The Study of Design for Testability on Analog Circuit Based ...

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International Conference on Computer Science and Service System (CSSS)

作者： Haijun Lin Zelong Hou Fu Yao Zhang Xuhui School of Measurement-Control Technology and Communication Engineering Harbin University Of Science And Technology Harbin China

Based on the analysis of the IEEE 1149.4 Std for a Mixed-Signal Test Bus, this paper analyzed the working and use principle of STA400 that supports the IEEE1149.4 Std in detail. Then this paper proposed constructive view on its use in design for testability on analog circuits, which has practical significance to the use of IEEE1149.4 Std.

关键词： Analog circuits Multiplexing Switches Design for testability Monitoring Probes

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Complex curve surfaces 3D measuring device based on gray code value stereo matching

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Journal of Convergence Information technology 2012年第4期7卷 205-214页

作者： Wang, Yang Pengyu, Tao Yu, Shuang Wu, Liwei Wang, Lijuan College of Measurement-Control and Communication Engineering Harbin University of Science and Technology Harbin China The higher educational key laboratory Measuring and Control Technology and Instrumentations of Heilongjiang province Harbin University of Science and Technology Harbin China

Three-Dimensional (3D) surface measuring, as an important procedure of reverse engineering, is being causing concerns interests by more and more researcher. In this paper, a 3D measuring device for complex curve surfaces based on Gray coded Structured Light (SL) and stereo vision was designed. The measuring model was built based on the measuring principle. And the Gray decoding value of each sample point is the stereo matching element. After errors analyzing, the error of image coordinate extracting is determined as the largest error source for measuring result. The results of experiments show that this design is feasible, and the acquirement of the 3D data of complex curve surfaces is achieved. The reconstruct surface is similar in the visual effects, and the reconstruction surface could be display smoothly and detail.

关键词： Stereo vision

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