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On convergence of covariance matrix of empirical Bayes hyper-parameter estimator

Control Theory and Technology 2024年第2期22卷 149-162页

作者： yue ju Biqiang Mu Tianshi Chen School of Data Science and Shenzhen Research Institute of Big Data The Chinese University of Hong KongShenzhenShenzhen518172GuangdongChina Division of Decision and Control Systems School of Electrical Engineering and Computer ScienceKTH Royal Institute of Technology10044StockholmSweden Key Laboratory of Systems and Control Institute of Systems ScienceAcademy of Mathematics and System ScienceChinese Academy of SciencesBeijing100190China

Regularized system identification has become the research frontier of system identification in the past *** related core subject is to study the convergence properties of various hyper-parameter estimators as the sample size goes to *** this paper,we consider one commonly used hyper-parameter estimator,the empirical Bayes(EB).Its convergence in distribution has been studied,and the explicit expression of the covariance matrix of its limiting distribution has been ***,what we are truly interested in are factors contained in the covariance matrix of the EB hyper-parameter estimator,and then,the convergence of its covariance matrix to that of its limiting distribution is *** general,the convergence in distribution of a sequence of random variables does not necessarily guarantee the convergence of its covariance ***,the derivation of such convergence is a necessary complement to our theoretical analysis about factors that influence the convergence properties of the EB hyper-parameter *** this paper,we consider the regularized finite impulse response(FIR)model estimation with deterministic inputs,and show that the covariance matrix of the EB hyper-parameter estimator converges to that of its limiting ***,we run numerical simulations to demonstrate the efficacy of ourtheoretical results.

关键词： Regularized system identification Hyper-parameter estimator Empirical Bayes Convergence of covariance matrix

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Experimental and theoretical insight into carbamazepine degradation by chlorine-based advanced oxidation processes:Efficiency,energy consumption,mechanism and DBPs formation

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Journal of Environmental Sciences 2024年第5期139卷 72-83页

作者： Chunwei Liu Zuo Tong How yue ju Li Feng Xuefeng Ren Mohamed Gamal El-Din Key Laboratory ofCoal Processing and Efficient Utilization of Ministry of Education School of Chemical Engineering and TechnologyChina University of Mining and TechnologyJiangsu 221116China Department of Civil and Environmental Engineering University of AlbertaEdmonton T6G 1H9AlbertaCanada School of Environment and Spatial Informatics China University of Mining and TechnologyJiangsu 221116China Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation ofHainan Province School of Ecology and EnvironmentHainan UniversityHainan 570228China

Chlorine has been widely used in different advanced oxidation processes(AOPs)for micropollutants *** this study,different chlorine-based AOPs,namely medium pressure(MP)UV/chlorine,low pressure(LP)UV/chlorine,and in-situ chlorination,were compared for carbamazepine(CBZ)removal efficiency,energy consumption,and disinfection by-products(DBPs)*** three processes could achieve nearly 100%CBZ removal,while the reaction time needed by in-situ chlorination was double the time required by UV/chlorine *** energy consumed per magnitude of CBZ removed(EE/O)of MP UV/chlorine was 13 times higher than that of LP UV/chlorine,and relative to that of in-situ chlorination ***,MP and LP UV/chlorine processes generated one to two orders of magnitude more hydroxyl radicals(^(·)OH)and reactive chlorine species(RCS)than in-situ ***,RCS were the dominant reactive species,contributing to 78.3%,75.6%,and 71.6% of CBZ removal in MP,LP UV/chlorine,and in-situ chlorination,*** to the Gibbs free energy barriers between CBZ and RCS/^(·)OH calculated based on density functional theory(DFT),RCS had more reaction routes with CBZ and showed lower energy barrier in the main CBZ degradation pathways like epoxidation and formation of *** applied to secondary wastewater effluent,UV/chlorine and in-situ chlorination produced overall DBPs ranging from 104.77 to 135.41μg/***,the production of chlorate during UV/chlorine processes was 15 times higher than that during in-situ chlorination.

关键词： UV/chlorine In-situ chlorination Energy efficiency Role of reactive species DFT calculation Disinfection by-products

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Improving Land Resource Evaluation Using Fuzzy Neural Network Ensembles

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Pedosphere 2007年第4期17卷 429-435页

作者： XUE yue-ju HU yue-Ming LIU Shu-Guang YANG Jing-Feng CHEN Qi-Chang BAO Shi-Tai College of Engineering South China Agricultural University Guangzhou 510642 （China）. College of Information South China Agricultural University Guangzhou 510642 （China） U.S. Geological Survey （USGS） Center for Earth Resources Observation and Science （EROS） Sioux Falls South Dakota 57198 （USA）

Land evaluation factors often contain continuous-, discrete- and nominal-valued attributes. In traditional land evaluation, these different attributes are usually graded into categorical indexes by land resource experts, and the evaluation results rely heavily on experts＇ experiences. In order to overcome the shortcoming, we presented a fuzzy neural network ensemble method that did not require grading the evaluation factors into categorical indexes and could evaluate land resources by using the three kinds of attribute values directly. A fuzzy back propagation neural network （BPNN）, a fuzzy radial basis function neural network （RBFNN）, a fuzzy BPNN ensemble, and a fuzzy RBFNN ensemble were used to evaluate the land resources in Guangdong Province. The evaluation results by using the fuzzy BPNN ensemble and the fuzzy RBFNN ensemble were much better than those by using the single fuzzy BPNN and the single fuzzy RBFNN, and the error rate of the single fuzzy RBFNN or fuzzy RBFNN ensemble was lower than that of the single fuzzy BPNN or fuzzy BPNN ensemble, respectively. By using the fuzzy neural network ensembles, the validity of land resource evaluation was improved and reliance on land evaluators＇ experiences was considerably reduced.

关键词： back propagation neural network (BPNN) data types fuzzy neural network ensembles land resource evaluation radial basis function neural network (RBFNN)

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Mycotoxin detection——Recent trends at global level

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Journal of Integrative Agriculture 2015年第11期14卷 2265-2281页

作者： Jonathan Nimal Selvaraj ZHOU Lu WANG Yan ZHAO yue-ju XING Fu-guo DAI Xiao-feng LIU Yang Institute of Agro-Products Processing Science and Technology Chinese Academy of Agricultural SciencesKey Laboratory of Agro-Products ProcessingMinistry of Agriculture

Mycotoxin contamination in agro-food systems has been a serious concern globally during the last few decades. Mycotoxins are toxic secondary metabolites produced by fungi when they grow in agro-food products and feedstuff. Several detection techniques have been developed in recent years to detect mycotoxins in the food and feed effectively. HPLC based tech- niques are very common in usage in the laboratories for the testing of mycotoxins. In recent years, immuno-based assays is widely used and have been reported at large due to its sensitivity and limited detection time. Immuno assay-based kits were developed effectively to be used in the fields and in storage systems to detect the mycotoxin levels. Microarray-based immunoassays developed in the recent years could simultaneously detect afiatoxin, ochratoxin, and zearalenone with the higher sensitivity. Aptamer-based assays could target the detection of ochratoxin and aflatoxins and fumonisins at high specificity in food products. In recent years, several assays reported for the simultaneous multiple detection of different mycotoxin was based on HPLC and LC-MS/MS. There is a need for the use of these advanced technologies in the com- mercial scale.

关键词： mycotoxins aflatoxins ochratoxin zearalenone assays detection

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Soil Quality Assessment Using Weighted Fuzzy Association Rules

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Pedosphere 2010年第3期20卷 334-341页

作者： XUE yue-ju LIU Shu-Guang HU yue-Ming YANG Jing-Feng South China Agricultural University Guangzhou 510642 (China) U.S. Geological Survey Center for Earth Resources Observation and Science Sioux Falls SD 57198 (USA) Geographic Information Science Center of Excellence South Dakota State University Brookings SD 57007 (USA)

Fuzzy association rules (FARs) can be powerful in assessing regional soil quality, a critical step prior to land planning and utilization; however, traditional FARs mined from soil quality database, ignoring the importance variability of the rules, can be redundant and far from optimal. In this study, we developed a method applying different weights to traditional FARs to improve accuracy of soil quality assessment. After the FARs for soil quality assessment were mined, redundant rules were eliminated according to whether the rules were significant or not in reducing the complexity of the soil quality assessment models and in improving the comprehensibility of FARs. The global weights, each representing the importance of a FAR in soil quality assessment, were then introduced and refined using a gradient descent optimization method. This method was applied to the assessment of soil resources conditions in Guangdong Province, China. The new approach had an accuracy of 87%, when 15 rules were mined, as compared with 76% from the traditional approach. The accuracy increased to 96% when 32 rules were mined, in contrast to 88% from the traditional approach. These results demonstrated an improved comprehensibility of FARs and a high accuracy of the proposed method.

关键词： accuracy comprehensibility global weights

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Applying the Kalman filter particle method to strange and open charm hadron reconstruction in the STAR experiment

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Nuclear Science and Techniques 2023年第10期34卷 148-157页

作者： Xin-yue ju yue-Hang Leung Sooraj Radhakrishnann Petr Chaloupka Xin Dong Yury Fisyak Pavol Federic Ivan Kisel Hong-Wei Ke Michal Kocan Spyridon Margetis Ai-Hong Tang Iouri Vassiliev Yi-Fei Zhang Xiang-Lei Zhu Maksym Zyzak University of Science and Technology of China Hefei 230026China Lawrence Berkeley National Laboratory BerkeleyCA 94720USA University of Heidelberg 69120 HeidelbergGermany Kent State University KentOH 44242USA Czech Technical University in Prague PragueCzech Republic Brookhaven National Laboratory UptonNY 11973USA Nuclear Physics Institute of the Czech Academy of Sciences PragueCzech Republic Goethe-Universitat Frankfurt Frankfurt am MainGermany Frankfurt Institute for Advanced Studies Frankfurt am MainGermany GSI Helmholtzzentrum für Schwerionenforschung GmbH DarmstadtGermany Tsinghua University Beijing 100084China

We applied KF Particle, a Kalman Filter package for secondary vertex finding and fitting, to strange and open charm hadron reconstruction in heavy-ion collisions in the STAR experiment. Compared to the conventional helix swimming method used in STAR, the KF Particle method considerably improved the reconstructed Λ, Ω, and D~0 significance. In addition, the Monte Carlo simulation with STAR detector responses could adequately reproduce the topological variable distributions reconstructed in real data using the KF Particle method, thereby retaining substantial control of the reconstruction efficiency uncertainties for strange and open charm hadron measurements in heavy-ion collisions.

关键词： Heavy-ion collisions Secondary vertex finding Kalman filter

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The Transfer of Land Contractual Management Rights in Ethnic Village--A Case Study of Ya'ergou Village in the Ningxia Hui Autonomous Region

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Asian Agricultural Research 2012年第4期4卷 44-49页

作者： WANG Hai-hong YANG yue-ju School of Management Lanzhou UniversityLanzhou 730000China

Based on field survey in Ya'ergou Village,Yuanzhou District,Guyuan City,the Ningxia Hui Autonomous Region,we analyze the status quo of the transfer of land contractual management rights in this village,and study the basic information,form,characteristics,and problems concerning the transfer of land contractual management rights in this nationality *** corresponding countermeasures are put forward for promoting the transfer of land contractual management rights in ethnic village as follows:strengthening the publicity of the policy in order to improve farmers' ideological understanding;raising the rent in order to promote the transfer of the land contractual management rights;diverting the governmental investment to the talented people within village;consolidating management and resolving disputes in the transfer timely and effectively.

关键词： The land contractual management rights Nationality village Transfer

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RCEP对亚太地区生产网络的影响--一个全球价值链视角的分析

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东北师大学报（哲学社会科学版） 2021年第3期 52-62,114页

作者：倪月菊中国社会科学院大学国际关系学院北京102488 中国社会科学院世界经济与政治研究所北京100732

区域全面伙伴关系协议(RCEP)在全球价值链重塑的大背景下成功签署。RCEP 15个国家是全球和区域价值链的深度参与者,一旦该协议正式实施,必将对全球价值链重塑产生深刻影响。笔者从全球价值链重塑的视角出发,深入探讨了RCEP对亚太地区生... 详细信息

区域全面伙伴关系协议(RCEP)在全球价值链重塑的大背景下成功签署。RCEP 15个国家是全球和区域价值链的深度参与者,一旦该协议正式实施,必将对全球价值链重塑产生深刻影响。笔者从全球价值链重塑的视角出发,深入探讨了RCEP对亚太地区生产网络的影响,认为RCEP将加速全球价值链的“区域化”步伐,使亚太地区生产网络由二战后日本学者构想的以日本为首的雁型发展模式加速向以中国和日本两国为头雁的“双头雁阵”模式转变。中国将依托RCEP这一巨大平台,深入参与亚太地区生产网络中并发挥更为重要的引领作用。这将对中国构建以国内循环为主、国际国内双循环的新发展格局产生深刻影响。

关键词： RCEP 全球价值链双头雁阵双循环

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TPP与国际服务贸易新规则及中国的应对策略

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深圳大学学报（人文社会科学版） 2016年第1期33卷 86-92页

作者：倪月菊中国社会科学院世界经济与政治研究所北京100732

全球化及国际服务贸易的快速发展呼唤与之相适应的国际服务贸易规则。多哈回合的停滞不前催生了区域及诸边服务贸易规则的涌现,美国更是欲将其主导的TPP作为建立新一代"高标准"的服务贸易自由化机制的途径之一。而TPP协议条款中所涉及... 详细信息

全球化及国际服务贸易的快速发展呼唤与之相适应的国际服务贸易规则。多哈回合的停滞不前催生了区域及诸边服务贸易规则的涌现,美国更是欲将其主导的TPP作为建立新一代"高标准"的服务贸易自由化机制的途径之一。而TPP协议条款中所涉及的服务贸易规则,在承诺方式、整体架构、重点服务部门的自由化推进、借助"监管一致性"议题促进服务市场开放等方面均呈现出高标准的特征,这些高标准的服务贸易新规则代表了未来国际服务贸易规则的发展方向。中国"入世"后,虽然在服务贸易自由化方面进行了有益的尝试,取得了一定的进展,但总体看,与TPP为代表的世界服务贸易新规则还有很大差距。中国必须未雨绸缪,做到知己知彼,方能应对国际服务贸易新规则带来的挑战。

关键词： GATS TPP协议服务贸易新规则

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连续时间耦合系统中时空混沌的自适应模糊控制

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物理学报 2001年第3期50卷 440-444页

作者：薛月菊冯汝鹏哈尔滨工业大学惯导中心哈尔滨150001

对模型未知的子系统是多维的连续时间耦合系统的时空混沌提出了自适应模糊控制方法 .该方法综合了自适应模糊系统的逼近能力和滑模控制鲁棒性强的优点 .并用Laypunov方法证明了该方法的稳定性 .对模型未知的连续时间耦合Duffing振子时... 详细信息

对模型未知的子系统是多维的连续时间耦合系统的时空混沌提出了自适应模糊控制方法 .该方法综合了自适应模糊系统的逼近能力和滑模控制鲁棒性强的优点 .并用Laypunov方法证明了该方法的稳定性 .对模型未知的连续时间耦合Duffing振子时空混沌控制进行了仿真研究。

关键词：时空混沌自适应模糊控制滑模控制连续时间耦合系统

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