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Properties of Gauss-Newton filter in linear cases

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Journal of Systems Engineering and Electronics 2018年第5期29卷 899-907页

作者： bao Zhichao jiang Qiuxi Institute of Electronic Countermeasure National University of Defense Technology

This paper presents the derivation of Gauss-Newton filter in linear cases and an analysis of its properties. Based on the minimum variance theorem, the Gauss-Newton filter is constructed and derived, including its state transition equation, observation equation and filtering process. Then, the delicate relationship between the Gauss-Aitken filter and the Kalman filter is discussed and it is verified that without process noise the two filters are equivalent. Finally, some simulations are conducted. The result shows that the Gauss-Aitken filter is superior to the Kalman filter in some aspects.

关键词： Gauss-Newton filter linear case target tracking

Intensive construction technology for urban underground parking shaft

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Frontiers of Structural and Civil Engineering 2024年第11期18卷 1649-1662页

作者： Hong jiang Xian liu Heli bao Jinfeng BI Tao LIN Tengfei HE Shanghai Urban Construction Design&Research Institute Shanghai 200125China College of Civil Engineering Tongji UniversityShanghai 200092China

As urban construction continues to develop and automobile ownership rises,parking shortages in cities have become increasingly *** the limited availability of land resources,conventional underground garages and parking buildings no longer suffice to meet the growing demand for parking *** address this dilemma,underground parking shaft(UPS)has emerged as a highly regarded *** study provides an overview of the layout scheme,structural design approaches,and construction techniques for UPS,focusing on the characteristics of intensive construction demonstrated in the project located in the Jianye District of *** to conventional vertical shaft garage construction methods,this assembly parking shaft offers advantages such as a smaller footprint,higher prefabrication rate,shorter construction period,and reduced environmental *** presents an efficient approach for the intensive construction of urban underground spaces,particularly in areas with limited land and complex environments,showing promising prospects for widespread application.

关键词： intensive construction parking shaft assembly underground garage

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三峡水库微塑料与悬沙的聚集特性及作用机制

湖泊科学 2025年第1期37卷 149-158页

作者：刘洁张智超李霞朱丽帆蒋晖重庆交通大学国家内河航道工程技术研究中心重庆400074 重庆交通大学河海学院重庆400074

本文依据三峡库区悬沙矿物组成和泥沙级配为依据配置沙样,选择长江上游典型微塑料PMMA和PS,在自制大型水箱中开展水流剪切作用下微塑料和泥沙异质聚集实验,分析微泥絮团的形态特征和聚集机制。结果表明在水流紊动剪切作用下,相比泥沙同... 详细信息

本文依据三峡库区悬沙矿物组成和泥沙级配为依据配置沙样,选择长江上游典型微塑料PMMA和PS,在自制大型水箱中开展水流剪切作用下微塑料和泥沙异质聚集实验,分析微泥絮团的形态特征和聚集机制。结果表明在水流紊动剪切作用下,相比泥沙同质聚集的絮团粒径,微泥异质聚集的絮团粒径更大,且每毫升样品中微泥絮团上的微塑料吸附数量随水流剪切率增大而迅速增加。扫描电镜和能谱分析结果表明,在水动力条件下泥沙与PMMA、PS微球发生异质聚集,聚集过程中存在电子转移和化学态的转变,并产生不饱和键(C C)。由于PMMA官能团的结合能变化比PS大,此过程失电子更多、表面电荷更大,更容易与泥沙发生聚集。

关键词：微塑料悬沙微泥絮团形貌聚集机制三峡水库

Voice conversion towards modeling dynamic characteristics using switching state space model

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Science China(Information Sciences) 2013年第12期56卷 237-251页

作者： XU Ning bao JingYi liu XiaoFeng jiang AiMing TANG YiBing College of Computer and Information Engineering Hohai University Ministry of Education Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications School of Electronic Information and Electric Engineering of Changzhou Institute of Technology

In the literature of voice conversion(VC),the method based on statistical Gaussian mixture model(GMM)serves as a ***,one of the inherent drawbacks of GMM is well-known as discontinuity problem,which is caused by transforming features on a frame-by-frame basis,thus ignoring the dynamics between adjacent frames and fnally resulting in degraded quality of the converted speech.A variety of algorithms have been proposed to overcome this defciency,among which the state space model(SSM)based method provides some promising *** this paper,we proceed by presenting an enhanced version of the traditional SSM,namely,the switching SSM(SSSM).This new structure is more flexible than the conventional one in that it allows using mixture of components to account for the rapid transitions between neighboring ***,physical meaning of the model parameters of SSSM has been examined in depth,leading to efcient application-specifc training and transforming procedures of *** including both objective and subjective measurements were conducted to compare the performances of the conventional and the proposed SSM-based methods,which have convinced that obvious improvements in both aspects of similarity and quality can be obtained by SSSM.

关键词： discontinuity problem dynamic characteristics Gaussian mixture model switching state space model voice conversion

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电动拖拉机驱动电机系统故障诊断模型研究

农机化研究 2025年第2期47卷 234-238页

作者：蒋延莲刘艳南京交通技师学院南京210049 南京理工大学泰州科技学院江苏泰州225300

驱动电机系统的故障可能导致电动拖拉机失控或发生意外情况,从而危及驾驶员和周围环境的安全,准确诊断故障可以帮助驾驶员及时采取措施,避免潜在的危险。为了进一步提高电动拖拉机驱动电机系统的故障诊断准确率,基于驱动电机系统的数据... 详细信息

驱动电机系统的故障可能导致电动拖拉机失控或发生意外情况,从而危及驾驶员和周围环境的安全,准确诊断故障可以帮助驾驶员及时采取措施,避免潜在的危险。为了进一步提高电动拖拉机驱动电机系统的故障诊断准确率,基于驱动电机系统的数据特征及故障类型,以BP人工神经网络模型为基础,通过PSO-BP优化后的人工神经网络模型构建电动拖拉机电机驱动电机系统故障诊断模型,并对传统BP神经网络模型的阈值和权重进行优化,以更快地收敛到全局最优解。通过采集驱动电机系统的数据,对基于PSO-BP故障诊断模型进行试验验证,结果表明:模型对5种故障状态诊断准确率较高,特别是退磁故障和IGBT故障这两种复杂的故障类型。研究内容能够为电动拖拉机驱动电机系统的故障诊断提供一种有效的方法和技术支持,可提高诊断准确率、保障驾驶员和周围环境的安全,提高了工作效率,降低了维修成本。

关键词：电动拖拉机驱动电机系统故障诊断准确率 PSO-BP优化算法

Upregulation of Slc26a4 in the Early Development of Silicosis via GEO Database Analysis in vivo and in vitro

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Biomedical and Environmental Sciences 2019年第12期32卷 938-943页

作者： jiang Qing Tao HAN Lei liu Xin ZHU bao Li Department of Medicine Jiangsu Health Vocational CollegeNanjing 211800JiangsuChina Institute of Occupational Disease Prevention Jiangsu Provincial Center for Disease Prevention and ControlNanjing 210028JiangsuChina

Silicosis is characterized by the development of progressive pulmonary fibrosis as a result of inhaling free *** is limited as to date only a limited number of effective therapies are *** fibrotic process usually takes between 15 and 20 years to develop and is dependent on the amount of SiO2 *** main symptoms are coughing,breathlessness,and general weakness,and diagnosisis primarily facilitated by chest *** tendto be diagnosed only in the late stages,when thelungs present considerable fibrotic nodules,andconsequently,an important loss of respiratoryfunction[1].Based on increasing evidenee fromepidemiological and experimental animal studies,the In ter national Agency for Research on Can cer(IARC)has classified crystalline silica as a Group 1carcinogen(1997),which could lead to lung cancer(LC)[2].

关键词： diagnosis lung primarily

Simultaneous biodegradation of nitrogen-containing aromatic compounds in a sequencing batch bioreactor

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Journal of Environmental Sciences 2007年第5期19卷 530-535页

作者： liu Xing-yu WANG bao-jun jiang Cheng-ying ZHAO Ke-xin Harold L. Drake liu Shuang-jiang State Key Lab of Microbial Resources at Institute of Microbiology Chinese Academy of Sciences Beijing 100080 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Department of Ecological Microbiology University of Bayreuth 95445 Bayreuth Germany

Many nitrogen-containing aromatic compounds （NACs）, such as nitrobenzene （NB）, 4-nitrophenol （4-NP）, aniline （AN）, and 2,4-dinitrophenol （2,4-DNP）, are environmentally hazardous, and their removal from contaminated water is one of the main challenges facing wastewater treatment plants. In this study, synthetic wastewater containing NB, 4-NP, 2,4-DNP, and AN at concentrations ranging from 50 to 180 mg/L was fed into a sequencing batch reactor （SBR）. Analyses of the SBR system indicated that it simultaneously removed more than 99% of the NACs at loading rates of 0.36 kg NB/（m^3·d）, 0.3 kg 4-NP/（m^3·d）, 0.25 kg AN/（m^3·d）, and 0.1 kg 2,4-DNP/（m^3·d）. Bacterial groups of Bacteriodetes, Candidate division TM7, α-Proteobacteria, and β-Proteobacteria were dominant in the clone libraries of 16S rRNA genes retrieved from the microbial communities in the SBR system. ＂Cycle tests＂ designed to alter feeding and aeration parameters of the SBR system demonstrated that the resident microbial biome of the SBR system responded rapidly to changing conditions. Consumption of O2 was concomitant with the apparent mineralization of NACs. Aromatic ring-cleaving dioxygenase activities suggested that （1） AN and NB were degraded via catechol 2,3-dioxygenase; （2） 4-NP was degraded via 1,2,4-benzentriol 1,2-dioxygenase; and （3） 2,4-DNP was degraded via an unresolved pathway.

关键词： nitrogen-containing aromatic compounds biodegradation sequencing batch reactor Candidate division TM7

Synthesis and Molecular Structure of 1,5-Diphenyl-3-phenacylthio-1H-1,2,4-triazole

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Chinese Journal of Structural Chemistry 2006年第8期25卷 1019-1023页

作者： liu Tian-bao jiang Wen-Qing ZOU Jian-Ping ZHANG Yong Key Laboratory of Organic Synthesis of jiangsu Province College ofChemistry and Chemical Engineering Suzhou University Jiangsu 215006 China Department of Chemistry Chizhou Teachers College Chizhou 247100 China

The title compound 1,5-diphenyl-3-phenacylthio-1H-1,2,4-triazole 2 （C22H17- N3OS, Mr = 371.45） was prepared by the reaction of 1-benzoyl-3-phenyl-aminothiourea 1 with 2-bromoacetophenone. The crystal is of triclinic, space group P^1-, a = 8.906（3）, b = 9.853（3）, c = 11.226（4）A, α= 100.562（5）, β= 101.285（5）, γ. = 105.096（6）^c, Z = 2, V = 903.7（5） ]A^3, Dc= 1.365 g/cm^3,μ（MoKa） = 0.196 mm^-1, F（000） = 388, the final R = 0.0506 and wR = 0.0985 for 2532 observed reflections （I〉 2σ（I））. Its formation mechanism was proposed.

关键词： triazole 1-benzoyl-3-phenylaminothiourea crystal structure

MIMO Scheduling Effectiveness Analysis for Bursty Data Service from View of QoE

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Chinese Journal of Electronics 2017年第5期26卷 1079-1085页

作者： CHEN Lei jiang Dingde bao Rong XIONG Jiping liu Fuqiang BEI Lulu jiangsu Province Key Laboratory of Intelligent Industry Control Technology Xuzhou University of Technology School of Computer Science and Engineering Northeastern University College of Mathematics Physics and Information EngineeringZhejiang Normal University College of Electronics and Information Engineering Tongji University

In the user selection phrase of the conventional Multiple-input-multiple-output(MIMO) scheduling schemes,the frequent user exchange deteriorates the Quality of user experience(Qo E) of the bursty data *** the channel vector orthogonalization computation results in a high time *** address these problems,we propose an inertial scheduling policy to reduce the number of noneffective user exchange,and substitute self-organization policy for channel vector orthogonalization computation to reduce computational *** relationship between the scheduling effectiveness and the inertia of objective function is observed in the *** simulation results show that the inertial scheduling policy effectively reduce the number of potential noneffective scheduling which is inversely proportional to the Mean opinion score(MOS)that quantifies the Qo *** proposed scheduling scheme provides significant improvement in Qo E performance in the *** the proposed scheduling scheme does not consider the channel vector orthogonalization in the user selection phrase,its throughput approaches the level of the throughput-oriented scheme because of its selforganization scheduling policy.

关键词： Bursty data service Multiple-inputmultiple-output(MIMO) Quality of user experience(QoE) Time perception