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Dynamics of Matter-Wave Solitons for Three-Dimensional Bose-Einstein Condensates with Time-Space Modulation

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Chinese Physics Letters 2012年第9期29卷 12-16页

作者： XIONG na LI Biao Nonlinear Science Center Ningbo UniversityNingbo 315211

By two direct assumption methods and symbolic computation,we present two families of one-soliton solutions and a family of two-soliton solutions with some arbitrary functions for the three-dimensional Gross–Pitaevskii equation with time-space *** we investigate the dynamics of these matter-wave solitons in three-dimensional Bose–Einstein *** can see that the intensities of both one-solitons and two-solitons first increase rapidly to the condensation peak value,then decay very slowly to the background *** these matter-wave solitons in three-dimensional Bose–Einstein condensates can remain for a sufficiently long time to be fully observed and modulated for real applications in today's experiments.

关键词： value. Einstein solitons

Interaction between the gut microbiome and mucosal immune system

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Military Medical Research 2017年第3期4卷 170-177页

作者： na Shi na Li Xinwang Duan Haitao Niu Institute of Laboratory Animal Sciences Chinese Academy of Medical Sciences (CAMS) and Comparative Medicine Center Peking Union Medical Collage (PUMC) Key Laboratory of Human Disease Comparative Medicine Ministry of Health Department of Rheumatology the Second Affiliated Hospital of Nanchang University

The gut microbiota, the largest symbiotic ecosystem with the host, has been shown to play important roles in maintaining intestinal homeostasis. Dysbiosis of the gut microbiome is caused by the imbalance between the commensal and pathogenic microbiomes. The commensal microbiome regulates the maturation of the mucosal immune system, while the pathogenic microbiome causes immunity dysfunction, resulting in disease *** gut mucosal immune system, which consists of lymph nodes, lamina propria and epithelial cells, constitutes a protective barrier for the integrity of the intestinal tract. The composition of the gut microbiota is under the surveillance of the normal mucosal immune system. Inflammation, which is caused by abnormal immune responses,influences the balance of the gut microbiome, resulting in intestinal diseases. In this review, we briefly outlined the interaction between the gut microbiota and the immune system and provided a reference for future studies.

关键词： Microbiome Immunity Inflammation

Neural Network-based Adaptive State-feedback Control for High-order Stochastic Nonlinear Systems

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自动化学报 2014年第12期40卷 2968-2972页

作者： MIN Hui-Fang DUAN na School of Electrical Engineering & Automation Jiangsu Normal University

This paper focuses on investigating the issue of adaptive state-feedback control based on neural networks(NNs)for a class of high-order stochastic uncertain systems with unknown nonlinearities. By introducing the radial basis function neural network(RBFNN) approximation method, utilizing the backstepping method and choosing an approximate Lyapunov function, we construct an adaptive state-feedback controller which assures the closed-loop system to be mean square semi-global-uniformly ultimately bounded(M-SGUUB). A simulation example is shown to illustrate the effectiveness of the design scheme.

关键词：径向基函数神经网络状态反馈控制器随机非线性系统自适应高阶 Lyapunov函数非线性问题不确定系统

Distributed consensus for multiple Euler-Lagrange systems: An event-triggered approach

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Science China(Technological Sciences) 2016年第1期59卷 33-44页

作者： HUANG na DUAN ZhiSheng ZHAO Yu State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Engineering Science College of EngineeringPeking University

Distributed consensus problems for multiple Euler-Lagrange systems are addressed on the basis of event-triggered information in this study. Distributed consensus protocols are first designed in terms of two event-triggered scenarios: a decentralized strategy and a distributed strategy. Sufficient conditions that guarantee the event-triggered consensus for multiple Euler-Lagrange systems are then presented, with the associated advantages of reducing controller update times. It is shown that the Zeno behavior of triggering time sequences is excluded for both strategies. Finally, multiple Euler-Lagrange systems that consist of six two-link manipulators are considered to illustrate the effectiveness of the proposed theoretical algorithms.

关键词： consensus event-triggered strategy Euler-Lagrange system distributed control

Numerical simulation and experimental study on dissolving characteristics of layered salt rocks

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Chinese Journal of Chemical Engineering 2019年第5期27卷 1030-1036页

作者： Qiqi Wanyan Yiming Xiao na Tang China University of Petroleum-Beijing Beijing J02249China College of Chemical Engineering and Material Science Tianjin University of Science and TechnologyTianjin 300457China Tianjin Key Laboratory of Marine Resources and Chemistry Tianjin 300457China

Underground salt cavern reservoirs are ideal spaces for energy storage. China is rich in salt rock resources with layered lacustrine sedimentary structures. However, the dissolution mechanism of layered salt rocks remains poorly understood, resulting in significant differences between the actual measurements and the designed indices for the layered salt rock water-soluble cavity-making cycle and the cavity shape. In this work, the dissolution rates of 600 groups of layered salt rocks in China under different conditions were determined ***, the established artificial neural network prediction model was used to assess the effects of the contents of naCl, na2 SO4, and CaSO4 in the salt rocks, concentrations, dissolution angles, and flow rates on their dissolution rates by performing ANOVA and F-test. The results provide a theoretical basis for evaluating the dissolution rate of layered salt rocks under different conditions and for the numerical simulation of the layered salt rock water-soluble cavity-making process.

关键词： Salt cavern reservoirs Layered salt rock Dissolution rate ANOVA

Properties of Z=114 super-heavy nuclei

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Nuclear Science and Techniques 2021年第6期32卷 1-10页

作者： Yu-Qi Xin na-na Ma Jun-Gang Deng Tian-Liang Zhao Hong-Fei Zhang School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000China Joint Department for Nuclear Physics Institute of Modern PhysicsCAS and Lanzhou UniversityLanzhou 730000China Engineering Research Center for Neutron Application Ministry of EducationLanzhou UniversityLanzhou 730000China

The center of the stability island of super-heavy nuclei(SHN)is the subject of intense experimental and theoretical investigations and has potential technological applications.^(298)^(114) Fl lies in the Z=114 isotopic chain as a persuasive candidate of the spherical double-magic nucleus in SHN,and in this study,the calculations of nuclear binding energies,one-nucleon and two-nucleon separation energies,a-decay energies,and the corresponding halflives provide strong evidence for this *** calculations within an improved Weizsacker-Skyrme nuclear mass model(WS*)were performed and compared with the calculations of the finite-range droplet model(FRDM2012)and experimental data for Z=114 isotopes and N=184 ***,the corresponding single-particle levels in a Woods-Saxon potential well with a spin-orbit term are calculated,which can be used as a powerful indicator to identify the shell effects existing *** the study of the properties of the isotopic chain and microphysical quantities provide a vital signal that ^(298)^(114) Fl is a spherical double-magic nucleus and also the center of the SHN.

关键词： Super-heavy nuclei Separation energy Single-particle level αdecay

The role of magnetic damping in the r-mode evolution of accreting neutron stars

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Science China(Physics,Mechanics & Astronomy) 2015年第3期58卷 90-95页

作者： CAO GuoJie ZHOU Xia WANG na Xinjiang Astronomical Observatory Chinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory of Radio Astronomy Chinese Academy of Sciences

The magnetic damping rate was introduced in the evolution equations of r-modes,which shows that r-modes can generate strong toroidal magnetic fields in the core of accreting millisecond pulsars inducing by differential *** consideration of the coupling evolution of r-modes,spin and thermal evolution,we investigated the influence of the magnetic damping on the differential rotation of nonlinear r-modes of accreting neutron *** derived the coupling evolution equations of the star involving the magnetic damping rate in the framework of second-order r-mode *** numerical results show that the magnetic damping suppressed the nonlinear evolution of r-modes since the saturation amplitude is reduced to a great *** particular,because of the presence of the generated toroidal magnetic field,the spin-down of the stars is terminated and the viscous heating effects are also ***,we could obtain a stronger generated toroidal magnetic field in the second-order r-mode *** gravitational radiation may be detected by the advanced laser interferometer detector LIGO if the amount of differential rotation is small when the r-mode instability becomes active and the accretion rate is not very high.

关键词： neutron stars r-mode instability differential rotation gravitational waves

Pressure Drop in Cyclone Separator at High Pressure

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Journal of Thermal Science 2008年第3期17卷 275-280页

作者： Zhu Zhiping na Yongjie Lu Qinggang Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 Graduate University of Chinese Academy of Sciences Beijing 100190

For the design of pressurized circulating fluidized beds, experiments were conducted in a small cyclone with 120 mm in diameter and 300 mm in height at high pressures and at atmospheric temperatures. Influence of air leakage from the stand pipe into the cyclone was specially focused. A semi-empirical model was developed for the prediction of the pressure drop of the cyclone separator at different operate pressures with the effect of air leakage and inlet solid loading. The operate pressure, air leakage and inlet solid loading act as significant roles in cyclone pressure drop. The pressure drop increases with the increasing of pressure and decreases with the increasing of the flow rate of air leakage from the standpipe and with the increasing of the inlet solid loading.

关键词： cyclone separator pressure drop air leakage

Enhancing the efectiveness of film cooling

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航空动力学报 2007年第4期22卷 531-539页

作者： Tom I-P Shih Sangkwon na Department of Aerospace Engineering Iowa State University Ames Iowa 50011 U. S. A

Advanced gas turbine stages are designed to operate at increasingly higher inlet temperatures to increase thermal efficiency and specific power *** maintain durability and reasonable life,film cooling is needed in addition to internal cooling,especially for the first *** cooling lowers material temperature by forced convection inside film-cooling holes and by forming a layer of coolant about component surfaces to insulate them from the hot ***,each cooling jet forms a pair of counter-rotating vortices that entrains hot gas and causes the film-cooling jet to lift off from the surface that it is intended to *** paper gives an overview of efforts to enhance the effectiveness of *** paper also describes two new design *** design concept seeks to minimize the entrainment of hot gases underneath of film-cooling jets by using flow-aligned *** other design concept shifts the interaction between the approaching hot gas and the cooling jet to occur further above the surface by using an upstream *** both design concepts,computational fluid dynamics results are presented to examine their usefulness in enhancing film-cooling effectivenes

关键词：航空动力推进系统薄雾冷却冷却效率燃气轮机流体动力学