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	1. A Superconducting Wide-Band Filter Subsystem with Improved Out-of-Band Performance
	Chen Wei,Chen Yidong,Guo Xubo,Cao Bisong,Zhang Xiaoping,Wei Bin,Jiang Linan
	Electrics, Communication and Autocontrol Technology 02 February 2012
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	Abstract:A High-temperature superconducting (HTS) wide-band filter subsystem, consisting of an HTS filter and a cryogenic low noise amplifier (CLNA), is presented. The HTS filter at 480 MHz with an 86 MHz bandwidth is designed using stepped impedance resonators to achieve a high out-of-band performance and a compact size. The deterioration of the out-of-band rejection after cascading the HTS filter with the CLNA is addressed and solved. The measurements of the filter subsystem, without any tuning, exhibit an excellent performance. The gain is 16.3 ± 0.2 dB, the noise figure is less than 0.35 dB, and the return loss is better than 15.6 dB. The out-of-band rejection is over 78 dB up to 1230 MHz, which is 2.6 times of the filter's center frequency.
	TO cite this article:Chen Wei,Chen Yidong,Guo Xubo, et al. A Superconducting Wide-Band Filter Subsystem with Improved Out-of-Band Performance[OL].[ 2 February 2012] http://en.paper.edu.cn/en_releasepaper/content/4464866


	2. Spectrum Allocation in Cognitive Radio with Particle Swarm Optimization Algorithm
	Zhang Jie,Lv Tiejun
	Electrics, Communication and Autocontrol Technology 10 January 2012
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	Abstract:Cognitive radio (CR) is of special significance to improve spectrum utilization, and spectrum allocation is one of the key technologies in the realization of cognitive radio. The spectrum allocation problem considered in this paper aims to maximize the throughput of the second users (SUs) within the transmit power limit of SUs and the PU interference constraint. Based on the throughput maximization model in CR network, the spectrum allocation algorithm based on particle swarm optimization (PSO) is proposed in this paper. According to the feature of CR, the interference caused by SUs transmission to the primary users must be taken into consideration, which makes the spectrum allocation problem different from other networks. Simulated annealing (SA) and roulette strategy are introduced to avoid algorithm prematurity of PSO and further improve the algorithm performace. Finally, simulation results show that the proposed PSO based spectrum allocation algorithm outperform the commonly used color-sensitive graph coloring (CSGC) and greedy algorithms.
	TO cite this article:Zhang Jie,Lv Tiejun. Spectrum Allocation in Cognitive Radio with Particle Swarm Optimization Algorithm[OL].[10 January 2012] http://en.paper.edu.cn/en_releasepaper/content/4461051

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	3. Opportunistic two-way relaying using time control over fading channels
	LIU Jianquan,TAO Meixia,XU Youyun
	Electrics, Communication and Autocontrol Technology 15 December 2011
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	Abstract:This paper studies two-way communications over a three-node Gaussian and Fading relay channel. Six-step opportunistic protocol and superimposed XOR-based decode-and-forward (DF) relay scheme are present. The achievable rate regions of the proposed opportunistic strategy have been analyzed by optimal time control and considering unequal packet length. For comparison, two-step protocol with optimal or equal time control and bitwise XOR-based DF and superposition-based DF are considered, respectively. This paper also studies the performance of weighted maximum sum-rate for the proposed 6-step opportunistic strategies at different relay locations in Rayleigh channel from three point of view: 1) maximum sum-rate without any constraint. 2) rate pairs under maximum weighted sum-rate with fairness. 3) service delay versus packet arrival rate with queue.
	TO cite this article:LIU Jianquan,TAO Meixia,XU Youyun. Opportunistic two-way relaying using time control over fading channels[OL].[15 December 2011] http://en.paper.edu.cn/en_releasepaper/content/4455956


	4. Temperature-Insensitive Pressure Sensor Based on All-Fused-Silica Extrinsic Fabry-Pérot Optical Fiber Interferometer
	Wenhua WANG,Qingxu YU,Fang LI,Xinlei ZHOU,Xinsheng JIANG
	Electrics, Communication and Autocontrol Technology 13 December 2011
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	Abstract:A novel high sensitivity pressure sensor based on all-fused-silica Extrinsic Fabry-Pérot optical fiber interferometer, which exhibits extreme low temperature dependence, has been developed. The sensor can excellently operate with a sensitivity of 5.18nm/KPa (0.75nm/psi), a resolution of 38Pa (0.005psi). Due to epoxy-free bonding and reserving a vent hole between the fiber and the ferrule in the process of laser heating fusion bonding, the temperature dependence is significantly reduced to the 0.011nm/℃, and pressure measurement error is 0.021KPa/℃ (0.003psi/℃). The operating point doesn't shift with backpressure change due to the vent hole. The sensor may be suitable for liquid measurement, environmental monitoring and other industrial applications in harsh environment.
	TO cite this article:Wenhua WANG,Qingxu YU,Fang LI, et al. Temperature-Insensitive Pressure Sensor Based on All-Fused-Silica Extrinsic Fabry-Pérot Optical Fiber Interferometer[OL].[13 December 2011] http://en.paper.edu.cn/en_releasepaper/content/4455359


	5. Response properties of photovoltaic detectors irradiated under femtosecond pulses
	Dong Zhiwei,Su Shuheng,Lv Kun,Xia Yuanqin,Chen Deying
	Electrics, Communication and Autocontrol Technology 15 November 2011
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	Abstract:Output properties of Si based photovoltaic detectors were researched applying femtosecond pulses with different repetition rates. The output properties of these detectors with different load conditions were also researched. The linear response domain of PIN detector with external reverse bias voltage was found quite large for different femtosecond pulses repetition rates. The sensitivity of PN detector was found much higher when applying external reverse bias voltage with femtosecond repetition rate 76 MHz. The saturation effect of PN detector was attributed to the slow response speed of the photovoltaic detector.
	TO cite this article:Dong Zhiwei,Su Shuheng,Lv Kun, et al. Response properties of photovoltaic detectors irradiated under femtosecond pulses[OL].[15 November 2011] http://en.paper.edu.cn/en_releasepaper/content/4450059


	6. PD plus Error-dependent Controllers for Robot Manipulators with Uncertain Kinematics
	HUANG Chunqing,XIE Lifen
	Electrics, Communication and Autocontrol Technology 13 June 2011
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	Abstract:In framework of PID controllers, there is only three parameters available to tune, as a result, performance of the resulting system is always limited. As for Cartesian regulation of robot manipulators with uncertain kinematics, a new scheme of PID controllers with error-dependent integral action is proposed. Compare with the traditional PID controllers, the error-dependent integration is employed in this proposed controller to improve performance. It makes better transient performance possible since more tuning parameters are involved to be tuning in this PID structure. Finally, numerical example demonstrates the efficiency of the proposed PID controller by Cartesian space set-point manipulation of two-link robotic manipulator.
	TO cite this article:HUANG Chunqing,XIE Lifen. PD plus Error-dependent Controllers for Robot Manipulators with Uncertain Kinematics[OL].[13 June 2011] http://en.paper.edu.cn/en_releasepaper/content/4432345


	7. Co-design of event generator and controller for event-triggered control system
	LI Shanbin,XU Bugong
	Electrics, Communication and Autocontrol Technology 27 April 2011
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	Abstract:This paper proposes the preliminary results on the co-design of event generator and controller for event-triggered control system. By applying a quadratic input-to-state stable Lyapunov function, a sufficient condition for the existence of the event-triggered controller and event generator is established using the linear matrix inequalities. We further present a sufficient condition for non-trivial inter-execution time. Using an inverted pendulum mechanism, the effectiveness of the proposed method is illustrated in contrast to a standard linear-quadratic regulator implemented in an event-triggered style.
	TO cite this article:LI Shanbin,XU Bugong. Co-design of event generator and controller for event-triggered control system[J].


	8. Modified model for four-wave mixing-based wavelength conversion in silicon micro-ring resonators
	LI Zhiqiang,GAO Shiming
	Electrics, Communication and Autocontrol Technology 22 January 2011
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	Abstract:In this paper, A modified model for wavelength conversion based on four-wave mixing (FWM) in a silicon micro-ring resonator is presented. The nonlinear phase shifts caused by self-phase modulation and cross-phase modulation are also taken into account in the present theoretical analysis besides the linear propagation loss, the nonlinear losses caused by two-photon absorption and free-carrier absorption. Analysis shows that the nonlinear phase shifts will cause different red shifts for the pump and signal (or converted) resonant wavelengths, and consequently an additional wavelength difference between the signal transmission dip and the efficiency peak, which will increase/decrease the conversion efficiency of the signal channel far from/near the pump. The conversion efficiency and the conversion peak width of each signal channel are both affected by the micro-ring radius and coupling coefficient. A broader conversion peak width can be obtained by using a micro-ring resonator with a smaller Q factor.
	TO cite this article:LI Zhiqiang,GAO Shiming. Modified model for four-wave mixing-based wavelength conversion in silicon micro-ring resonators[OL].[22 January 2011] http://en.paper.edu.cn/en_releasepaper/content/4407155


	9. Research of Error Processing Technical on Fiber Optic Gyros in Inertial Navigation System
	Pin Lv,Jian-ye Liu,Ling Zhang,Ji-zhou Lai
	Electrics, Communication and Autocontrol Technology 21 January 2011
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	Abstract:As a newly angular rate sensor, Fiber Optic Gyro (FOG) is widely applied in inertial navigation system (INS), and technical of error cancelling is of great importance. According to its application and characteristics in INS, error signals of FOG are classified, and such methods as wavelet threshold filtering and rotating modulation are studied to reduce errors like constant error, long-time drift, noise and so on. The basic principles of these two methods are analysed and practical engineering problems are discussed. Experiment is done, and the results indicate that combination of wavelet filtering and rotation modulation can inhibit the specific error effectively, and the technologies are of wide application.
	TO cite this article:Pin Lv,Jian-ye Liu,Ling Zhang, et al. Research of Error Processing Technical on Fiber Optic Gyros in Inertial Navigation System[OL].[21 January 2011] http://en.paper.edu.cn/en_releasepaper/content/4408157


	10. Signal Matching Wavelet for Ultrasonic Flaw Detection in High Background Noise
	Shi Guangming,Chen Xuyang,Song Xiaoxia,Qi Fei,Ding Ailing
	Electrics, Communication and Autocontrol Technology 25 May 2010
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	Abstract:It is very important to detect the flaw echoes for ultrasonic nondestructive evaluation in high background noise. The existing methods based on wavelet transform (WT) mainly use a wavelet basis to match a signal. As is well known, there are dozens of wavelet modes in all, whereas the signal may appear in various forms in practical application. Then the optimal match between the wavelet basis and the signal is difficult to be generated due to the constraints of wavelet. In this paper we propose a method of signal matching wavelet (SMW) for ultrasonic flaw detection in high background noise. In SMW the transmitted signal is designed to be a wavelet mode for matching a wavelet basis. Since our method gets rid of the constraints of wavelet, the optimal match between the echo signal and a wavelet basis is easy to be achieved. And we analyze the energy distribution of ultrasonic signal and propose the energy matching criteria to design the transmitted signal, which guarantees the optimal match. Furthermore, we put forward a scheme for choosing system parameters and the parameter of transmitted signal to enhance the matching capacity. In addition, a low-rate equivalent discrete WT (DWT) structure based on polyphase decomposition is designed to reduce the hardware cost and farther facilitate practical application. Finally the simulative results show that SMW can efficiently detect the flaw under high background noise even for the SNR low to -20 dB, which cannot be obtained by using other methods to our best knowledge.
	TO cite this article:Shi Guangming,Chen Xuyang,Song Xiaoxia, et al. Signal Matching Wavelet for Ultrasonic Flaw Detection in High Background Noise[OL].[25 May 2010] http://en.paper.edu.cn/en_releasepaper/content/4373752

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