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PARAMETER ESTIMATION OF CHIRP SIGNALS USING THE METROPOLIS-ADJUSTED-LANGEVIN’S ALGORITHM

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PARAMETER ESTIMATION OF CHIRP SIGNALS USING THE METROPOLIS-A...

Orthogonal linear polarized lasers (II)——Study on the physical phenomena

第七届国际信号处理会议

作者： LIN Yan WANG Xiutan PENG Yingning (Department of Electronic Engineering tsinghua university beijing 100084 china)

This paper addresses the problem of parameter estimation of chirp signals in additive Gaussian white noise. A new Markov Chain Monte Carlo (MCMC) method called the Metropolis-adjusted-Langevin’s (M

关键词： parameter estimation Markov Chain Monte Carlo (MCMC) Metropolis-adjusted-Langevin’s (MAL) algorithm chirp signals

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Progress in Natural Science:Materials International 2005年第10期 3-14页

作者： ZHANG Shulian and LIU Gang (The State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, tsinghua university, beijing 100084, china)

The physical phenomena and corresponding theoretical analysis of orthogonal polarized laser are reviewed. Four lasers (or systems) with orthogonal polarized beams arc involved. For the birefringence dual frequency laser, its physical phenomena discussed include the alternation between strong mode competition and medium mode competition in cavity tuning; the range of frequency difference of strong mode competition (about 0-40 MHz); four polarization statuses (o-light oscillating but e-light extinguishing, both o-light and elight oscillating, e-light oscillating but o-light extinguishing, both o-light and e-light extinguishing) in cavity tuning; the tuning curves of frequency difference; the influence of optical activity of quartz crystal on polarization direction; and the aberrance of frequency splitting. For the Birefringence-Zeeman dual frequency laser, we focus on its intensity tuning and frequency difference tuning. For the feedback system of orthogonally polarized laser, we discuss the mutual suppression between two orthogonal frequencies, intensity exchange between two orthogonal frequencies and double of intensity fringe frequency. For orthogonally polarized LD-pumped Nd:YAG microchip laser, its property of the dependence of intensity sensitivity on frequency difference is described.

关键词： orthogonally polarized laser frequency splitting cavity tuning mode competition intra-cavity birefringence Zee-man effect frequency difference optical activity optical feedback.

Behavior of point defects upon ion irradiation studied by precipitate coherency

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Behavior of point defects upon ion irradiation studied by pr...

Admission Control with Elastic QoS for Video on Demand Systems

2006全国核材料学术交流会

作者： Li Zhengcao Laboratory of Advanced Materials, Department of Materials Science and Engineering, tsinghua university, beijing 100084, china

A typical precipitation hardened alloy, Cu-Co dilute alloy has been selected to study the precipitation behavior and irradiation effect on precipitates. It is found that the principal effect of ion irradiation on the coherent precipitates is loss of coherency, and TEM cross-section observations show that the fraction of the incoherent precipitates is dependent on dose but not on dose rate during heavy ton irradiation.

关键词： coherency-to-incoherency transition ion irradiation precipitate

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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 23.027, china 2 National Network New Media Engineering Research {3., 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

核动力装置蒸汽发生器水位的分层模糊自适应控制

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控制与决策 2002年第6期17卷 933-936页

作者：滕树杰张乃尧崔震华清华大学自动化系北京100084 清华大学工程物理系北京100084

针对压水堆核动力装置蒸汽发生器的水位控制提出一种分层模糊自适应控制方案。该方案中 2个模糊控制器分层连接 ,每个模糊控制器均采用典型模糊控制单元 ,使得模糊规则个数和可调参数个数大大减少 ,便于在线学习和实时控制。给出了分层... 详细信息

针对压水堆核动力装置蒸汽发生器的水位控制提出一种分层模糊自适应控制方案。该方案中 2个模糊控制器分层连接 ,每个模糊控制器均采用典型模糊控制单元 ,使得模糊规则个数和可调参数个数大大减少 ,便于在线学习和实时控制。给出了分层模糊控制器的解析表达式及可调参数的在线学习方法。在快速加负荷和突然甩负荷的仿真实验中 ,该方案的控制效果明显优于已有的变参数 PID控制 ,验证了该方案的有效性。

关键词：核动力装置蒸汽发生器水位分层模糊自适应控制核电站

Geochemical and isotopic imprints of hydrodynamic environments of fissure waters in crystalline rocks

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Chinese Science Bulletin 1997年第9期42卷 756-761页

作者： WANG Yanxin and Khaustov Alexander P.1. china university of Geosciences, Wuhan 43.074, china 2. Russian university of People’s Friendship, Moscow, Russia china university of Geosciences Wuhan 430074 China

IN recent years,world-wide researches in relation to geologic disposal of nuclear wastes,ore-forming process modelling and ultradeep geologic drilling have been carried out in areas of crys-talline rocks,and,as a resu... 详细信息

关键词： crystalline rocks hydraulic continuity hydrochemistry isotopes.

Impact of industrial wastewater disposal on surface water bodies in Mostord area, North Greater Cairo

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Journal of Environmental Sciences 2001年第4期13卷 485-490页

作者： M.F.Abdel Sabour 1, F.H.Rabie 2, T.Mostafa 3. S.A.Hassan 4 (1 Soil and Water Pollution Unit, Nuclear Research center, Egypt. 2 Soil Department, Faculty of Agricultural, Ain Shams university, Egypt 3.Soils, Water and Environment Research Instit Soil and Water Pollution Unit Nuclear Research Center Egypt. mamdouhaabour@***

The studied area (Shoubra El Khima, Bahteem and Mostorod) lies in the industrial area north of Greater Cairo. The area suffers from several environmental problems such as sewage and disposal of pollutants from the surrounding factories into the surface water pathways in the area. Water samples were collected seasonally from different waterways found in the area, domestic and or industrial liquid wastes from 12 discharge tubes of different factories (as a point source of pollution). Chemical characteristics of different water samples and its heavy metals content were determined using ion coupled plasma technique (ICP). Results indicate that industrial and domestic wastewater samples contain several toxic levels of tested heavy metals (Cd, Co, Pb and Ni) which have a serious impact on surface waterways in the area. Shebin El Qanater collector drain samples exhibited the highest levels of Cd, Co, Pb and Ni compared to other tested water bodies. Mostorod collector drain samples showed the highest levels of Zn and Cu. Industrial effluent samples collected from Cairo Company for Fabric industry had the highest amounts of total Zn Cu, Cd, Co and Pb, while Delta steel company discharges the highest amounts of total Fe and Mn. Al Ahleya Plastic Company discharges the highest amounts of total Ni. Generally, it is necessary to impose the environmental laws and its regulation regarding the industrial wastewater treatments and disposals to minimize the risk of the adverse effects of these pollutants.

关键词： industrial wastewater disposal north Greater Cairo Egypt

Singularity detection of the rabbit electrocardiogram:An evolutionary spectral method

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Progress in Natural Science:Materials International 2009年第10期19卷 1317-1326页

作者： Xinyuan Liua,Dingwu He a,Liuqing Pei b,Suming Zhanga a School of Electronics Engineering and Computer Science,Peking university,beijing 100871,china b College of Information Science and Engineering,beijing Normal university,beijing 100875,china [a]School of Electronics Engineering and Computer Science Peking University Beijing 100871 China [b]College of Information Science and Engineering Beijing Normal University Beijing 100875 China

The time-frequency characteristics of the spectral density of non-stationary signals(NSS) in the neighborhood of an instant time point can be determined using the evolutionary spectral *** experimental rabbit model involving ligation of the left anterior descending coronary artery to simulate the physiology of early phase myocardial ischemia(EPMI) has been previously ***,EPMI derived from left coronary artery stenosis is the main symptom of coronary heart diseases including acute myocardial ***,we propose a new algorithm for estimating the evolutionary spectral density functions,which is an effective approach to determine the instantaneous frequency spectra(IFS) of NSS under the uncertainty principle in the time-frequency *** localization singularity information in the data recorded from a living system could be detected by means of the ***(ECG) data recorded from experimental rabbits were analyzed with the new *** showed that the Q’s value of the evolutionary spectral quality number of the QRS-complex data was the characteristic parameter of ECG,and there was a matched connection between the time-frequency characteristics of QRS-complex data and the myocardial ischemia symptoms of the *** results provide valuable information regarding features of the EPMI for use in clinical diagnoses.

关键词： Non-stationary signals Electrocardiogram(ECG) Evolutionary spectrum Instantaneous frequency spectrum(IFS) Myocardial ischemia

基于多分类支持向量机的智能辅助质量诊断研究

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系统仿真学报 2009年第6期21卷 1689-1692,1696页

作者：吴德会九江学院数字控制技术与应用江西省重点实验室九江332005 清华大学电机工程与应用电子技术系北京100084

在分析比较目前常用的质量辅助诊断方法局限性的基础上,提出了一种基于多分类支持向量机(SVM)的质量控制图智能诊断新方法。该方法以SVM技术为智能核心,较好地解决小样本学习问题,避免了人工神经网络等智能方法在对小批量生产过程质量... 详细信息

在分析比较目前常用的质量辅助诊断方法局限性的基础上,提出了一种基于多分类支持向量机(SVM)的质量控制图智能诊断新方法。该方法以SVM技术为智能核心,较好地解决小样本学习问题,避免了人工神经网络等智能方法在对小批量生产过程质量诊断时所表示出的过学习、泛化能力弱等缺点。另一方面,通过结合投票法和决策树的基本思想,所提方法拓展出对控制图混合型异常模式的识别能力,从而提高了对质量过程诊断的全面性和准确性。与其它几种常见人工智能方法质量诊断的效果进行对比,实验表明,所提方法容易实现、诊断精度高,为实现小批量加工过程的在线质量诊断与控制提供可行的思路。

关键词：小批量质量诊断多分类支持向量机决策树