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Acta Mathematicae Applicatae Sinica 2009年第2期25卷 195-204页

作者： Tao Hu Heng-jian Cui xing-wei Tong School of Mathematical Sciences Beijing Normal University Laboratory of Mathematics and Complex Systems Ministry of Education Beijing 100875 China

This article considers a semiparametric varying-coefficient partially linear regression model with current status data. The semiparametric varying-coefficient partially linear regression model which is a generalization of the partially linear regression model and varying-coefficient regression model that allows one to explore the possibly nonlinear effect of a certain covariate on the response variable. A Sieve maximum likelihood estimation method is proposed and the asymptotic properties of the proposed estimators are discussed. Under some mild conditions, the estimators are shown to be strongly consistent. The convergence rate of the estimator for the unknown smooth function is obtained and the estimator for the unknown parameter is shown to be asymptotically efficient and normally distributed. Simulation studies are conducted to examine the small-sample properties of the proposed estimates and a real dataset is used to illustrate our approach.

关键词： Partly linear model varying-coefficient current status data asymptotically efficient estimator sieve MLE

Microbial community structures in an integrated two-phase anaerobic bioreactor fed by fruit vegetable wastes and wheat straw

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Journal of Environmental Sciences 2014年第12期26卷 2484-2492页

作者： Chong Wang Jiane Zuo Xiaojie Chen wei xing Linan xing Peng Li Xiangyang Lu Chao Li College of Bioscience and Biotechnology Hunan Agricultural University State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC) School of Environment Tsinghua University Bioprocess control (Sweden) Co. Ltd. Beijing Representative Office

The microbial community structures in an integrated two-phase anaerobic reactor（ITPAR）were investigated by 16 S r DNA clone library technology. The 75 L reactor was designed with a 25 L rotating acidogenic unit at the top and a 50 L conventional upflow methanogenic unit at the bottom, with a recirculation connected to the two units. The reactor had been operated for 21 stages to co-digest fruit/vegetable wastes and wheat straw, which showed a very good biogas production and decomposition of cellulosic materials. The results showed that many kinds of cellulose and glycan decomposition bacteria related with Bacteroidales,Clostridiales and Syntrophobacterales were dominated in the reactor, with more bacteria community diversities in the acidogenic unit. The methanogens were mostly related with Methanosaeta, Methanosarcina, Methanoculleus, Methanospirillum and Methanobacterium; the predominating genus Methanosaeta, accounting for 40.5%, 54.2%, 73.6% and 78.7% in four samples from top to bottom, indicated a major methanogenesis pathway by acetoclastic methanogenesis in the methanogenic unit. The beta diversity indexes illustrated a more similar distribution of bacterial communities than that of methanogens between acidogenic unit and methanogenic unit. The differentiation of methanogenic community composition in two phases, as well as pH values and volatile fatty acid（VFA） concentrations confirmed the phase separation of the ITPAR. Overall, the results of this study demonstrated that the special designing of ITPAR maintained a sufficient number of methanogens, more diverse communities and stronger syntrophic associations among microorganisms, which made two phase anaerobic digestion of cellulosic materials more efficient.

关键词： Integrated two-phase anaerobic digestion 16S r DNA clone library Fruit/vegetable waste Wheat straw Co-digestion

Recovery of valuable metals from waste diamond cutters through ammonia–ammonium sulfate leaching

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International Journal of Minerals,Metallurgy and Materials 2017年第12期24卷 1352-1360页

作者： Ping Xue Guang-qiang Li Yong-xiang Yang Qin-wei Qin Ming-xing wei Key Laboratory for Ferrous Metallurgy and Resource Utilization of Ministry of Education Wuhan University of Science and Technology School of Electromechanical and Architectural Engineering Jianghan University Department of Materials Science and Engineering Delft University of Technology

Copper and zinc were recovered from waste diamond cutters through leaching with an ammonia–ammonium sulfate system and air as an oxidant. The effects of experimental parameters on the leaching process were investigated, and the potential–pH(E–pH) diagrams of Cu–NH_3–SO_4^(2-)–H_2O and Zn–NH_3–SO_4^(-2)–H_2O at 25°C were drawn. Results showed that the optimal parameters for the leaching reaction are as follows: reaction temperature, 45°C; leaching duration, 3 h; liquid-to-solid ratio, 50:1(mL/g); stirring speed, 200 r/min; ammonia concentration, 4.0 mol/L; ammonium sulfate concentration, 1.0 mol/L; and air flow rate, 0.2 L/min. The results of the kinetics study indicated that the leaching is controlled by the surface chemical reaction at temperatures below 35°C, and the leaching is controlled by diffusion through the product layer at temperatures above 35°C.

关键词： recovery waste diamond cutters renewable resources ammonia–ammonium sulfate leaching kinetics

Bi-variable damage model for fatigue life prediction of metal components

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Acta Mechanica Sinica 2011年第3期27卷 416-425页

作者： Miao Zhang Qing-Chun Meng xing Zhang wei-Ping Hu Division 508 School of Aeronautic Science and Engineering Beihang University 100191 Beijing China

Based on the theory of continuum damage mechanics,a bi-variable damage mechanics model is developed,which,according to thermodynamics,is accessible to derivation of damage driving force,damage evolution equation and damage evolution criteria. Furthermore,damage evolution equations of time rate are established by the generalized Drucker＇s postulate. The damage evolution equation of cycle rate is obtained by integrating the time damage evolution equations,and the fatigue life prediction method for smooth specimens under repeated loading with constant strain amplitude is constructed. Likewise,for notched specimens under the repeated loading with constant strain amplitude,the fatigue life prediction method is obtained on the ground of the theory of conservative integral in damage mechanics. Thus,the material parameters in the damage evolution equation can be obtained by reference to the fatigue test results of standard specimens with stress concentration factor equal to 1,2 and 3.

关键词： Bi-variable damage model - Damage evolution equation . Life prediction - Fatigue . Damage mechanics

Controlled Teleportation of an Unknown N-qubit Entangled GHZ State

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Communications in Theoretical Physics 2007年第6期47卷 1045-1048页

作者： JIANG wei-xing FANG Jian-xing ZHU Shi-Qun SHA Jin-Qiao School of Physical Science and Technology Suzhou University Suzhou 215006 China

A scheme for controlled teleportation of an unknown N-qubit entangled GHZ state from the sender Alice to the distant receiver Bob is proposed. And m-qubit GHZ state is sufficient for the task of control by m spatially- separated supervisors. Conditioned on the local operations executed by all participants, Bob can faithfully restore the original state by performing relevant unitary transformations with the aid of some classical message about measurement results. Anyone＇s absence will absolutely lead to the failure of teleportation.

关键词： quantum information quantum teleportation entangled GHZ state Bell state measurement

Crystallization behavior of blast-furnace slag by single hot thermocouple technique

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Journal of Iron and Steel Research International 2020年第3期27卷 259-265页

作者： Tie-lei Tian Shuang Cai Yu-zhu Zhang Hong-wei xing College of Metallurgy and Energy North China University of Science and TechnologyTangshan 063009HebeiChina College of Mechanical Engineering Yanshan UniversityQinhuangdao 066004HebeiChina

The crystallization behavior of blast-furnace slag under isothermal and continuous-cooling conditions was studied using the single hot thermocouple *** crystallization phases were obtained using FactSage software and X-ray *** crystallization kinetic parameters were calculated by combining these results with the Johnson-Mehl—Avrami *** isothermal conditions,the shortest crystallization incubation time was 24 and 18 s when the temperatures were 1300 and 1150℃,and the corresponding critical cooling rates were 4.5 and 14.3℃/s,*** 1270℃,the slag was difficult to crystallize and the fiber-forming rate *** the continuous-cooling rate was 6.5℃/s,the slag solidified into a glassy *** main crystallization phases,gehlenite,akermanite,anorthite,and melangite,were most easily *** growth factors of melangite and anorthite were approximately 1.63 and 1.68,respectively,which indicated that the crystals nucleated on the surface and grew in two dimensions.

关键词： Blast-furnace slag Cooling rate Crystallization Single hot thermocouple technique

Brain dynamic mechanisms on the visual attention scale with Chinese characters cues

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Chinese Science Bulletin 2002年第19期47卷 1644-1649页

作者： GAO Wenbin wei Jinghan PENG Xiaohu wei xing LUO Yuejia Laboratory of Mental Health Institute of PsychologyChinese Academy of SciencesBeijing 100101China Lab Visual Information Processing Chinese Academy of SciencesBeijing 100101China

The temporal dynamics in brain evoked by the scale of visual attention with the cues of Chinese characters were studied by recording event-related potentials (ERPs). With the fixed orientation of visual attention, 14 healthy young participants performed a search task in which the search array was preceded by Chinese characters cues, '大, 中, 小' (large, medium, small). 128 channels scalp ERPs were recorded to study the role of visual attention scale played in the visual spatial attention. The results showed that there was no significant difference in the ERP components evoked by the three Chinese characters cues except the in-feroposterior N2 latency. The targets evoked P2, N2 amplitudes and latency have significant differences with the different cues of large, middle and small, while P1 and N1 components had no significant difference. The results suggested that the processing of scale of visual attention was mainly concerned with P2, N2 components, while the P1, N1 components were mainly related with

关键词： event-related potential visual spatial attention scale cues of Chinese characters.

High Energy ^-pp and pp Elastic Scatterings in QCD Inspired Model

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Communications in Theoretical Physics 2007年第4期47卷 715-718页

作者： LU Juan MA wei-xing HE Xiao-Rong Collaboration Group of Hadron Physics and Non-perturbative QCD Study Guangxi University of Technology Liuzhou 545006 China Institute of Physics Science and Engineering Technology Guangxi University Nanning 530004 China Institute of High Energy Physics the Chinese Academy of Sciences Beijing 100049 China

We propose QCD inspired model to calculate ^-pp and pp elastic scatterings at high energies in this paper. A calculation for total cross section of ^-pp and pp is performed in which the contributions from gluon-gluon, quark-quark, and gluon-quark interactions are included. Our results show that the QCD inspired model gives a perfect fit to experimental data of total cross section both for ^-pp and pp elastic scatterings at the whole energy region where experimental data existed at FNAL and CERN.

关键词： QCD inspired model eikonal profile function high-energy elastic scattering

Linear Programming-Based Consensus of Positive Continuous-Time Multi-Agent Systems

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IEEE/CAA Journal of Automatica Sinica 2024年第12期11卷 2519-2521页

作者： Junfeng Zhang Fengyu Lin Shihong Ding wei xing the School of Information and Communication Engineering Hainan University Artificial Intelligence and Automation Huazhong University of Science and Technology the School of Electrical and Information Engineering Jiangsu University

Dear Editor,This letter deals with the consensus of positive multi-agent systems(PMASs). A consensus protocol is proposed by introducing a finite consensus point. An error is defined as the differences in the linear combination of the agent states, the agent states, and the finite consensus point. Under the consensus protocol, an error system is constructed, and it refers to the error term and the finite consensus point. A linear programming(LP)-based equation is given to remove the dependence of the finite consensus point. By virtue of the property of a directed graph, an error-independent system is obtained.

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Dependence of Quark Effective Mass on Gluon Propagators

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Communications in Theoretical Physics 2005年第4X期44卷 670-674页

作者： HE Xiao-Rong ZHOU Li-Juan wei-xing Institute of Physical Science and Engineering Technology Guangxi University Nanning 530004 China Collaboration Group of Hadron Physics and Non-perturbative QCD Study Guangxi University of Technology Liuzhou 545006 China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of Lanzhou Lanzhou 730000 China Institute of High Energy Physics the Chinese Academy of Sciences P.O. Box 918 Beijing 100049 China

Based on Dyson Schwinger Equations （DSEs） in the “rainbow” approximation, the dependence of quark effective mass on gluon propagator is investigated by use of three different phenomenological gluon propagators with two parameters, the strength parameter x and range parameter △. Our theoretical calculations for the quark effective mass Mf（p^2）, defined by the self-energy functions Af（p^2） and Bi（p%2） of the DSEs, show that the dynamically running quark effective mass is strongly dependent on gluon propagator. Therefore, because gluon propagator is completely unknown, the quark effective mass cannot be exactly determined theoretically.

关键词： quark mass gluon propagator DSEs QCD