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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第4期10卷 497-503页

作者： Xin liu Guo WEI Jin-wei SUN dan liu Department of Automatic Measurement and Control Harbin Institute of Technology Harbin 150001 China

Least squares support vector machines (LS-SVMs) are modified support vector machines (SVMs) that involve equality constraints and work with a least squares cost function, which simplifies the optimization procedure. In this paper, a novel training algorithm based on total least squares (TLS) for an LS-SVM is presented and applied to multifunctional sensor signal reconstruction. For three different nonlinearities of a multifunctional sensor model, the reconstruction accuracies of input signals are 0.001 36%, 0.031 84% and 0.504 80%, respectively. The experimental results demonstrate the higher reliability and accuracy of the proposed method for multifunctional sensor signal reconstruction than the original LS-SVM training algorithm, and verify the feasibility and stability of the proposed method.

关键词： Least squares support vector machine Total least squares multifunctional sensor Signal reconstruction

Shape-changed propagations and interactions for the(3+1)-dimensional generalized Kadomtsev–Petviashvili equation in fluids

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Communications in Theoretical Physics 2021年第9期73卷 1-16页

作者： dan-dan Zhang Lei Wang Lei liu Tai-Xing liu Wen-Rong Sun School of Mathematics and Physics North China Electric Power UniversityBeijing 102206China Beijing Computational Science Research Center Beijing 100193China School of Mathematics and Physics University of Science and Technology BeijingBeijing 100083China

In this article,we consider the(3+1)-dimensional generalized Kadomtsev–Petviashvili(GKP)equation in *** show that a variety of nonlinear localized waves can be produced by the breath wave of the GKP model,such as the(oscillating-)W-and M-shaped waves,rational W-shaped waves,multi-peak solitary waves,(quasi-)Bell-shaped and W-shaped waves and(quasi-)periodic *** on the characteristic line analysis and nonlinear superposition principle,we give the transition conditions *** find the interesting dynamic behavior of the converted nonlinear waves,which is known as the time-varying *** further offer explanations for such *** then discuss the classification of the converted *** finally investigate the interactions of the converted waves including the semi-elastic collision,perfectly elastic collision,inelastic collision and one-off *** the mechanisms of the collisions are analyzed in *** results could enrich the dynamic features of the high-dimensional nonlinear waves in fluids.

关键词： state transition time-varying feature nonlinear superposition principle interaction classification

Synthesis of Benzoxazine Functionalized Amine-Bridged Bis(phenolato) Rare Earth Complexes and Their Application in Ring-Opening Polymerization of rac-Lactide

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Chinese Journal of Chemistry 2022年第21期40卷 2516-2524页

作者： Chunping Feng Debao mu Xuehua Zhu Yaorong Wang dan Yuan Yingming Yao Key Laboratory of Organic Synthesis of Jiangsu Province State and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsCollege of ChemistryChemical Engineering&Materials ScienceDushu Lake CampusSoochow UniversitySuzhouJiangsu215123China School of Chemistry and Life Science Suzhou University of Science and TechnologySuzhouJiangsu 215009China

The reactivities of benzoxazine functionalized amine bridged bis(phenol)s LnH_(2)(n=1—3)with rare earth metal complexes were explored,founding that both the aryl substituents of the ligand and the rare earth metals h... 详细信息

关键词： Rare earth metal complex Bridging ligands rac-LA Ring opening polymerization Heteroselectivity

New Abundant Exact Solutions For Kundu Equation

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Acta Mathematicae Applicatae Sinica 2015年第3期31卷 729-734页

作者： Jun liu Zheng-de DAI Gui mu Xi liu College of Mathematics and Information Science Qujing Normal University School of Mathematics and Statistics Yunnan University School of Information Science and Engineering Yunnan University

In this paper, the higher order NLS equation with cubic-quintic nonlinear terms is studied, new abundant solitary solutions with traveling-wave envelope of this equation are obtained with the aid of a generalized auxi... 详细信息

关键词： Kundu equation generalized auxiliary equation method solitary wave

Jordan Higher Derivable Maps on Triangular Algebras by Commutative Zero Products

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Acta Mathematica Sinica,English Series 2016年第2期32卷 258-264页

作者： dan liu Jian Hua ZHANG College of Mathematics and Information Science Shaanxi Normal University

In this paper, the structure of Jordan higher derivable maps on triangular algebras by commutative zero products is given. As an application, the form of Jordan higher derivable maps of nest algebras by commutative ze... 详细信息

关键词： Triangular algebra Jordan higher derivable map commutative zero product

Total ionizing dose effect modeling method for CMOS digital-integrated circuit

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Nuclear Science and Techniques 2024年第2期35卷 32-46页

作者： Bo Liang Jin-Hui liu Xiao-Peng Zhang Gang liu Wen-dan Tan Xin-dan Zhang School of Computer Science and Technology Xidian UniversityXi’an 710071China

Simulating the total ionizing dose(TID)of an electrical system using transistor-level models can be difficult and expensive,particularly for digital-integrated circuits(ICs).In this study,a method for modeling TID effects in complementary metaloxide semiconductor(CMOS)digital ICs based on the input/output buffer information specification(IBIS)was *** digital IC was first divided into three parts based on its internal structure:the input buffer,output buffer,and functional *** of these three parts was separately *** the IBIS model,the transistor V-I characteristic curves of the buffers were processed,and the physical parameters were extracted and modeled using *** the functional area,logic functions were modeled in VHDL according to the data sheet.A golden digital IC model was developed by combining the input buffer,output buffer,and functional area ***,the golden ratio was reconstructed based on TID experimental data,enabling the assessment of TID effects on the threshold voltage,carrier mobility,and time series of the digital *** experiments were conducted using a CMOS non-inverting multiplexer,NC7SZ157,and the results were compared with the simulation results,which showed that the relative errors were less than 2%at each dose *** confirms the practicality and accuracy of the proposed modeling *** TID effect model for digital ICs developed using this modeling technique includes both the logical function of the IC and changes in electrical properties and functional degradation impacted by TID,which has potential applications in the design of radiation-hardening tolerance in digital ICs.

关键词： CMOS digital-integrated circuit Total ionizing dose IBIS model Behavior-physical hybrid model Physical parameters

Research on mine dustfall agents based on the mechanism of wetting and coagulation

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International Journal of Minerals,Metallurgy and Materials 2014年第3期21卷 205-209页

作者： Jing Yang dan-dan liu Bing-jie liu Min-min He Ying-feng Wang College of Chemical and Environmental Engineering Shandong University of Science and Technology Key Laboratories of Coal Mine Disaster Prevention and Control Shandong University of Science and Technology

Mine dust is classified as one of five natural coal mining disasters because it can harm the health of miners and poses a serious threat to the safety of the coal mine. Therefore, preparation of an effective dust suppression agent is highly desired. To improve the capture efficiency of fine dust, this study examines the dust suppression effects of various combinations of wetting agents, additives, and coagulation agents by using the optimum seeking method to reduce mine dust, particularly respirable particles. The optimal formula is shown to contain 10wt% fatty alcohol polyoxyethylene ether（JFC）, 4.96wt% cationic polyacrylamide, and 4wt% calcium chloride. The dust suppression effect can be achieved at 96.1% in 5 min by using the optimal formula.

关键词： mine dust dust abatement wetting coagulation surface tension contact angle

Tracing the impact of stack configuration on interface resistances in reverse electrodialysis by in situ electrochemical impedance spectroscopy

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Frontiers of Environmental Science & Engineering 2022年第4期16卷 69-80页

作者： Wenjuan Zhang Bo Han Ramato Ashu Tufa Chuyang Tang Xunuo liu Ge Zhang Jing Chang Rui Zhang Rong mu Caihong liu dan Song Junjing Li Jun Ma Yufeng Zhang Tianjin Key Laboratory of Aquatic Science and Technology School of Environmental and Municipal EngineeringTianjin Chengjian UniversityTianjin 300384China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090China Department of Inorganic Technology University of Chemistry and Technology PragueTechnicka 516628Prague 6Czech Republic Department of Civil Engineering the University of Hong KongHong KongChina Key Laboratory of Eco-environments in Three Gorges Reservoir Region(Ministry of Education) School of Urban Construction and Environmental EngineeringChongqing UniversityChongqing 400044China School of Environmental Science and Engineering Tianjin Polytechnic UniversityTianjin 300387China

Reverse electrodialysis(RED)is an emerging membrane-based technology for the production of renewable energy from mixing waters with different ***,the impact of the stack configuration on the Ohmic and non-Ohmic resistances as well as the performance of RED were systematically studied by using in situ electrochemical impedance spectroscopy(EIS).Three different parameters(membrane type,number of cell pairs and spacer design)were *** Ohmic and non-Ohmic resistances were evaluated for RED stacks equipped with two types of commercial membranes(Type I and Type II)supplied by Fujifilm Manufacturing Europe B.V:Type I Fuji membranes displayed higher Ohmic and non-Ohmic resistances than Type II membranes,which was mainly attributed to the difference in fixed charge *** output power of the stack was observed to decrease with the increasing number of cell pairs mainly due to the increase in ionic shortcut *** the reduction in spacer thickness from 750 to 200μm,the permselectivity of membranes in the stack decreased from 0.86 to 0.79 whereas the energy efificiency losses increased from 31%to 49%.Overall,the output of the present study provides a basis for understanding the impact of stack design on internal losses during the scaling-up of RED.

关键词： Reverse electrodialysis Electrochemical impedance spectroscopy Concentration polarization Spacer shadow effect

Rural vehicle emission as an important driver for the variations of summertime tropospheric ozone in the Beijing-Tianjin-Hebei region during 2014-2019

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Journal of Environmental Sciences 2022年第4期34卷 126-135页

作者： Yifei Song Yuanyuan Zhang Junfeng liu Chenglong Zhang Chengtang liu Pengfei liu Yujing mu Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China Center for Excellence in Urban Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China

Tropospheric ozone(O_(3))pollution is increasing in the Beijing-Tianjin-Hebei(BTH)region despite a significant decline in atmospheric fine aerosol particles(PM_(2.5))in recent ***,the intrinsic reason for the elevation of the regional O_(3)is still *** this study,we analyzed the spatio-temporal variations of tropospheric O_(3)and relevant pollutants(PM_(2.5),NO_(2),and CO)in the BTH region based on monitoring data from the China Ministry of Ecology and Environment during the period of *** results showed that summertime O_(3)concentrations were constant in Beijing(BJ,0.06μg/(m^(3)·year))but increased significantly in Tianjin(TJ,9.09μg/(m^(3)·year))and Hebei(HB,6.06μg/(m3·year)).Distinct O_(3)trends between Beijing and other cities in BTH could not be attributed to the significant decrease in PM_(2.5)(from-5.08 to-6.32μg/(m3·year))and CO(from-0.053 to-0.090 mg/(m^(3)·year))because their decreasing rates were approximately the same in all the *** relatively stable O_(3)concentrations during the investigating period in BJ may be attributed to a faster decreasing rate of NO_(2)(BJ:-2.55μg/(m^(3)·year);TJ:-1.16μg/(m^(3)·year);HB:-1.34μg/(m3·year)),indicating that the continued reduction of NOx will be an effective mitigation strategy for reducing regional O_(3)*** positive correlations were found between daily maximum8 hr average(MDA8)O_(3)concentrations and vehicle population and highway freight transportation in ***,we speculate that the increase in rural NO_(x)emissions due to the increase in vehicle emissions in the vast rural areas around HB greatly accelerates regional O_(3)formation,accounting for the significant increasing trends of O_(3)in HB.

关键词： Tropospheric ozone The Beijing-Tianjin-Hebei region Spatio-temporal trends Rural vehicle emission

Advances in brain tumor therapy: from molecular diagnostics to novel treatments

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Science China Life Sciences 2024年第12期67卷 2771-2773页

作者： Junwen Zhang Ran mu Fusheng liu Brain Tumor Research Center Beijing Neurosurgical Institute Capital Medical University Department of Neurosurgery Beijing Tiantan Hospital Capital Medical University

With the rapid increase in incidence and mortality, brain tumors have become a major social, economic, and public health problem worldwide. According to the latest report from the International Agency for Research on Cancer(IARC),there are approximately 320,000 new cases and 250,000 deaths from brain and central nervous system(CNS) tumors each year. The incidence and mortality rates rank 19th and 12th among all cancers(Bray et al., 2024), respectively,and are particularly prevalent in East Asia, Western Europe, and South Asia.

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