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A LQP BASED INTERIOR PREDICTION-CORRECTION METHOD FOR NONLINEAR COMPLEMENTARITY PROBLEMS

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Journal of Computational Mathematics 2006年第1期24卷 33-44页

作者： Bing-sheng He Li-zhi Liao Xiao-ming Yuan Department of Mathematics Nanjing University Nanjing 210093 China Department of Mathematics Hong Kong Baptist University Hong Kong China Department of Mathematics City University of Hong Kong Hong Kong China

To solve nonlinear complementarity problems （NCP）, at each iteration, the classical proximal point algorithm solves a well-conditioned sub-NCP while the Logarithmic-Quadratic Proximal （LQP） method solves a system of nonlinear equations （LQP system）. This paper presents a practical LQP method-based prediction-correction method for NCP. The predictor is obtained via solving the LQP system approximately under significantly relaxed restriction, and the new iterate （the corrector） is computed directly by an explicit formula derived from the original LQP method. The implementations are very easy to be carried out. Global convergence of the method is proved under the same mild assumptions as the original LQP method. Finally, numerical results for traffic equilibrium problems are provided to verify that the method is effective for some practical problems.

关键词： Logarithmic-Quadratic proximal method Nonlinear complementarity problems Prediction-correction Inexact criterion

Remediation of Cu and As contaminated water and soil utilizing biochar supported layered double hydroxide:Mechanisms and soil environment altering

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Journal of Environmental Sciences 2023年第4期126卷 275-286页

作者： Pengling Shao Hua Yin Yingchao Li Yuhao Cai Caiya Yan Yibo Yuan zhi dang School of Environment and Energy South China University of TechnologyGuangzhou 510006China Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters Guangzhou 510006China Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling Guangzhou 510006China

Preparing materials for simultaneous remediation of anionic and cationic heavy metals contamination has always been the focus of research. Herein a biochar supported FeMnMg layered double hydroxide(LDH) composites(LB) for simultaneous remediation of copper and arsenic contamination in water and soil has been assembled by a facile co-precipitation approach. Both adsorption isotherm and kinetics studies of heavy metals removal by LB were applied to look into the adsorption performance of adsorbents in water. Moreover, the adsorption mechanisms of Cu and As by LB were investigated, showing that Cu in aqueous solution was removed by the isomorphic substitution, precipitation and electrostatic adsorption while As was removed by complexation. In addition, the availability of Cu and As in the soil incubation experiments was reduced by 35.54%–63.00% and 8.39%–29.04%, respectively by using LB. Meanwhile, the addition of LB increased the activities of urease and sucrase by 93.78%–374.35% and 84.35%–520.04%, respectively, of which 1% of the dosage was the best. A phenomenon was found that the richness and structure of microbial community became vigorous within 1% dosage of LB, which indirectly enhanced the passivation and stabilization of heavy metals. These results indicated that the soil environment was significantly improved by LB. This research demonstrates that LB would be an imaginably forceful material for the remediation of anionic and cationic heavy metals in contaminated water and soil.

关键词： Heavy metal Biochar supported layered double hydroxide composite Adsorption mechanism Soil remediation Microbial community

Large SU（3） Symmetry Breaking in J／ψ→BB Decays

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Communications in Theoretical Physics 2002年第3期37卷 319-322页

作者： MENGYan－zhi ZHUYong－sheng 等 DepartmentofPhysics PekingUniversityBeijing100871China InstituteofHighEnergyPhysics theChineseAcademyofScencesBeijing100039China

Large SU(3) symmetry breaking effects in J/ψ -B decay processes are discressed using the Mark I,Mark H, DM2 and the recent data from BES Collaboration.

关键词：基本粒子 SU(3)对称破缺 J/ψ→BB衰变

The “Bi-drifting” Subpulses of PSR J0815+0939 Observed with the Fivehundred-meter Aperture Spherical Radio Telescope

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Research in Astronomy and Astrophysics 2022年第2期22卷 195-203页

作者： Lun-Hua Shang Jun-Tao Bai Shi-Jun dang Qi-Jun zhi School of Physics and Electronic Science Guizhou Normal UniversityGuiyang 550001China School of Electronic and Optical Engineering Nanjing University of Science and TechnologyNanjing 210094China Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal UniversityGuiyang 550001China

We report the "Bi-drifting" subpulses observed in PSR J0815+0939 using the Five-hundred-meter Aperture Spherical radio Telescope(FAST). The observation at band from 1050 to 1450 MHz is evenly divided into two bands, i.e., the bands at center frequencies of 1150 and 1350 MHz. The mean pulse profiles and the "Bi-drifting"subpulses at these two bands are investigated. It is found that the pulse profiles at these two frequencies show four emission components, and the peak separations between four emission components decrease with the increase of frequency. In addition, the ratio of peak intensity of each component to the intensity of component Ⅳ at 1150 MHz is larger than that at 1350 MHz. We carry out an analysis of the longitude-resolved fluctuation spectrum and twodimensional fluctuation spectrum for each emission component, and find that the P3 of components Ⅰ,Ⅱ and Ⅲ is about 10.56, 10.57 and 10.59 s at 1150 and 1350 MHz. However, the reliable measurements of P3 of component IV and P2 for these four components were not obtained due to the low signal-to-noise ratio of observation *** pulse energy distributions at frequencies 1150 and 1350 MHz are presented, and it is found that no nulling phenomenon has been found in this pulsar. With our observation from the FAST, the "Bi-drifting" subpulse phenomenon of PSR J0815+0939 is expanded from 400 to 1350 MHz, which is helpful for the relevant researchers to test and constrain the pulsar emission model, especially the model of "Bi-drifting" subpulse.

关键词： (stars:)pulsars:general (stars:)pulsars:individual(PSR J0815+0939) radiation mechanisms:nonthermal

Enhanced thermal conductivity and dielectric properties in electrostatic self-assembly 3D pBN@nCNTs fillers loaded in epoxy resin composites

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Journal of Materiomics 2020年第4期6卷 751-759页

作者： Dong-Li Zhang sheng-Nan Liu Hui-Wu Cai Qi-Kun Feng Shao-Long Zhong Jun-Wei Zha zhi-Min dang State key Laboratory of Power System Department of Electrical EngineeringTsinghua UniversityBeijing100084China School of Chemistry and Chemical Engineering Xi’an University of Science and TechnologyXi’an710054China School of Chemistry and Biological Engineering University of Science and Technology BeijingBeijing100083China Center on Frontier Technologies for Advanced Power Transmission and Distribution Equipment School of Electrical EngineeringZhengzhou UniversityHenan450001China

High-performance epoxy(EP)composites with excellent thermal conductivity and dielectric properties have attracted increasing attention for effective thermal *** this work,three-dimensional(3D)structural functional fillers were prepared by an electrostatic self-assembly *** negatively charged carbon nanotubes(nCNTs)prepared by carboxylation on the surface of CNTs were attached to the positively charged boron nitride(pBN)to form the 3D pBN@nCNTs functional *** morphological characterizations of the formed 3D pBN@nCNTs fillers and epoxy composites were established,illustrating that nCNTs were linearly overlapped between the BN sheets,thus forming a 3D heat conduction network in the epoxy *** synergistic effect of pBN with nCNTs on the enhancement of thermal conductivity and dielectric properties of composites was systematically *** experimental results demonstrated that the thermal conductivity of pBN@nCNTs/EP composites could reach 1.986 W m1K1 with the loading of 50 wt%fillers at 10:1 mass ratio of pBN:nCNTs,which is 464%and 124%higher than that of pure EP and BN/EP,***,the dielectric permittivity was successfully increased to ***,the thermal stability of the composites was synchronously *** study provides a facile path to fabricate thermosetting polymer composites with high thermal conductivity and dielectric properties.

关键词： Thermal conductivity Dielectric permittivity Composites Electrostatic self-assembly

Development of RF windows for 650 MHz multibeam klystron

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Nuclear Science and Techniques 2023年第9期34卷 58-68页

作者： sheng-Chang Wang Zu-sheng Zhou zhi-Jun Lu zhi-Qing Liu Shigeki Fukuda Yu Liu Jing-Yi Li Wei-Ming Li National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230026China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Kunshan Guo Li Electronic Technology Co. Ltd.Kunshan 215300China High Energy Accelerator Research Organization KEK 1-1 OhoTsukubaIbaraki 305-0801Japan

Radio frequency windows are developed and evaluated for a 650 MHz continuous-wave multibeam ***-pillbox windows with alumina and beryllia disks are designed with an average RF power of CW 400 *** of a cold test and tuning procedures are *** final measured S11 curves under the required bandwidth are less than-32.0 and-26.9 dB for alumina and beryllia windows,*** windows are tested up to CW 143 kW for traveling waves and CW 110 kW for standing waves using a solid-state amplifier as an RF power *** simulations for windows and benchmark studies for the thermal analysis of ceramic disks are introduced.

关键词： RF window High-power test MBK

Effects of RRA Treatments on Microstructures and Properties of a New High-strength Aluminum-Lithium Alloy-2A97

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Chinese Journal of Aeronautics 2007年第2期20卷 187-192页

作者： YUAN zhi-shan LU Zheng XIE You-hua DAI sheng-long LIU Chang-sheng School of Materials ＆ Metallurgy Northeastern University Shenyang 110004 China Beijing Institute of Aeronautical Materials Beijing 100095 China

A new high strength 2A97 Al-Cu-Li-X alloy was subjected to triple-aging of retrogression and re-aging treatments （RRA）. Transmission electron microscopy （TEM）, differential scanning calorimetry （DSC）, and tensile tests were used to investigate the effects of RRA treatment on the microstructures and properties. DSC test reveals the reversion temperature range of the strengthening δ＇（Al3Li） phase. The results show that the microstructure consists of δ＇（Al3Li） phase, T1 （Al2CuLi） phase and θ″/θ′（Al2Cu） phase for 2A97 alloy treated by a triple-aging of a retrogression and re-aging treatment in the following order：（1） at 165℃×30 min, （2） at 220 ℃ or 240℃ × 15 min, （3） at 165℃×24 h. The plastic deformation, incorporated into the treatment after secondary high temperature aging, promotes the T1 precipitation during final re-aging. The tensile properties of the alloy treated by the retrogression and re-aging treatment reach the peak level of alloy single-aged at 165℃ in T6 temper.

关键词： 2A97 Al-Cu-Li-X alloy RRA treatments triple aging microstructure reversion

Investigation on Semi-conductive Properties of Hot Growth Film on 316L Austenitic Stainless Steel

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Chemical Research in Chinese Universities 2011年第4期27卷 697-702页

作者： LI dang-guo CHEN Da-rong WANG Jia-dao CHEN Hao-sheng State Key Laboratory ofTribology Tsinghua University Beijing 100084 t~ R. China

The semi-conductive performances of hot growth film on 316L stainless steel were studied by means of electrochemical impedance spectroscopy（EIS） and Mott-Schottky *** chemical compositions of the hot growth films were detected by X-ray photoelectron spectroscopy（XPS）.The results show that the transfer resistance and film resistance increase with increasing temperature to 400℃,then they decrease sharply with further continuously increasing *** time plays an important role in determining the electron properties of the hot growth film,when formation time reaches to 1 d,the transfer resistance and film resistance reach to the maximum *** growth film has better anticorrosion behaviour in bicarbonate/carbonate solution containing chloride ions or sulfide ***-Schottky analysis reveals that hot growth film has n-p type semi-conductive *** results show that the hot growth film is mainly composed of the inner chromium oxide and the outer iron oxide.

关键词： Stainless steel Electrochemical impedance spectroscopy(EIS) Mott-Schottky X-Ray photoelectron spec-troscopy(XPS) Passive film

Validity of premature ejaculation diagnostic tool and its association with International Index of Erectile Function-15 in Chinese men with evidence-based-defined premature ejaculation

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Asian Journal of Andrology 2018年第1期20卷 19-23页

作者： Dong-Dong Tang Chao Li dang-Wei Peng Xian-sheng Zhang Department of Urology The First Affiliated Hospital of Anhui Medical University Hefei China Reproductive Medicine Center The First Affiliated Hospital of Anhui Medical University Hefei China

The premature ejaculation diagnostic tool （PEDT） is a brief diagnostic measure to assess premature ejaculation （PE）. However, there is insufficient evidence regarding its validity in the new evidence-based-defined PE. This study was performed to evaluate the validity of PEDT and its association with IIEF-15 in different types of evidence-based-defined PE. From June 2015 to January 2016, a total of 260 men complaining of PE and defined as lifelong PE （LPE）/acquired PE （APE） according to the evidence-based definition from Andrology Clinic of the First Affiliated Hospital of Anhui Medical University, along with 104 male healthy controls without PE from a medical examination center, were enrolled in this study. All individuals completed questionnaires including demographics, medical and sexual history, as well as PEDT and IIEF-15. After statistical analysis, it was found that men with PE reported higher PEDT scores （14.28 ± 3.05） and lower IIEF-15 （41.26 ± 8.20） than men without PE （PEDT： 5.32 ± 3.42, IIEF-15：52.66 ± 6.86, P 〈 0.001 for both）. It was suggested that a score of 〉9 indicated PE in both LPE and APE by sensitivity and specificity analyses （sensitivity： 0.875, 0.913; specificity： 0.865, 0.865, respectively）. In addition, IIEF-15 were higher in men with LPE （42.64 ± 8.11） than APE （39.43 ± 7.84, P 〈 0.001）. After adjusting for age, IIEF-15 was negatively related to PEDT in men with LPE （adjust r = -0.225, P 〈 0.001） and APE （adjust r = -0.378, P 〈 0.001）. In this study, we concluded that PEDT was valid in the diagnosis of evidenced-based-defined PE. Furthermore, IIEF-15 was negatively related to PEDT in men with different types of PE.

关键词： erectile dysfunction International Index of Erectile Function-15 male sexual dysfunction premature ejaculation premature ejaculation diagnostic tool