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A Novel Text Retrieval Algorithm for Public Crisis Cases

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Chinese Journal of Electronics 2019年第4期28卷 712-717页

作者： PENG Yan wang Jie jiao Lulin School of Management Capital Normal University

Public crisis has the characteristics of suddenness and uncertainty, and it is necessary to combine the knowledge with the experience of other similar situations to make decisions effectively and *** work combines artificial intelligent theory with information technology and brings case-based reasoning to build models consisting of the features of public crisis. We explore the case-representation approach and build a case-based retrieval algorithm. Combining the specificness of Case-based reasoning(CBR) technology in the monitoring of public crisis events, a new case retrieval algorithm for public crisis cases, named as Combined multi-similarity with set of simi-larity matching algorithm based on sememe(CMSBS), is proposed to analyze the cases with high similarity to current *** CMSBS algorithm considers the structural and semantic similarities between two public crisis cases comprehensively. Simulation experiments are performed to validate the representation method of the knowledge,and the simulation results demonstrate that the CMSBS algorithm has superior performance in the average number of matching cases and matching accuracy rate and can work well in providing reference cases for subsequent events.

关键词： Knowledge representation Case retrieval Public crisis Case-based reasoning

Study on Working Pairs of Sorption Type Air Conditioner for Electric Vehicles under Different Temperature Zones

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Journal of Thermal Science 2019年第5期28卷 1004-1014页

作者： AN Guoliang wang Liwei wang Zixuan GAO jiao Institute of Refrigeration and Cryogenics Shanghai Jiao Tong University

The air conditioning(AC) system of electric vehicles(EVs) consumes a large part of electricity of on-board batteries and influences the continue voyage course seriously. The feasibility of sorption type AC for EVs has been verified theoretically to decrease this part of energy consumption. However, the choice of optimal working pairs based on local working conditions is not considered before, which can realize not only high efficiency but also the steady and reliable operation. Thus in this paper, different solid sorption working pairs used in sorption type AC under different temperature zones are studied. We utilized Rubotherm balance test unit to study the sorption properties of various working pairs(halide-ammonia) and selected candidate working pairs by Clapeyron equation and energy analysis. Results show that MnCl2 is the only choice for cold temperate zone(CTZ) and CaCl2 is optimal for warm temperate zone(WTZ), while the mixed double halide(MnCl2 and CaCl2) is recommended in other zones. In middle temperate zone(MTZ), the probability for performance dropping down is relatively large, thus the ratio(CaCl2:Mn Cl2) is recommended as 0.33–1 to take advantage of the stability property of MnCl2. While in Qinghai-Tibet plateau cold area(QTPCA, the special temperature zone in China), the ratio is chosen as 2–3 because only under the limiting condition reaction [Ca(NH3)8]Cl2 (←→) [Ca(NH3)4]Cl2 +4NH3 is invalid. Because the continued high environmental temperature will increase the probability of limiting condition, ratio of subtropical zone(STZ) is still selected as 2–3 while that of tropical Zone(TZ) is 1–2. Taking WTZ under summer condition as example, by using sorption type AC with CaCl2 as sorbent, the increment voyage course(IVC) over the practical voyage course with conventional compression AC system(PVC) ranges from 9.4% to 37.7% for different type of EVs, i.e. the continue voyage course is increased effectively. This work provides the guidance for choosing opti

关键词： electric vehicle automobile air conditioning solid sorption energy density continue voyage course

Selective extraction of titanium from Ti-bearing slag via the enhanced depolarization effect of liquid copper cathode

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Journal of Energy Chemistry 2020年第3期29卷 43-48页

作者： Zhenghao Pu Handong jiao Zhishan Mi Mingyong wang Shuqiang jiao State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Beijing Advanced Innovation Center for Materials Genome Engineering Corrosion and Protection CenterUniversity of Science and Technology BeijingBeijing 100083China

Ti-bearing slag(TiO2>20 wt%)is a valuable titanium secondary *** extraction of titanium from the slag is difficult due to the complex composition and *** molten oxide electrolysis is considered as a promising method,silicon will be preferentially electroreduced compared to titanium due to low theoretical decomposition *** this work,a liquid copper cathode is used to selectively extract titanium from molten Al2O3-MgO-CaO-TiO2-SiO2 *** is found that comparing to silicon,titanium can be preferentially reduced by one-step electron transfer due to the enhanced depolarization effect on a liquid copper ***,Ti-Cu alloys are firstly obtained from molten Ti-bearing slag,and then Ti-Si alloys are co-electrodeposited in the molten oxide electrolyte with low TiO2 *** may be ascribed to the larger binding force between titanium and copper than that between silicon and *** provides an effective strategy for the separation of titanium from of Ti-bearing slag.

关键词： Titanium alloys Molten oxides electrolysis Liquid cathode Selective depolarization

Recent progress and prospective on layered anode materials for potassium-ion batteries

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International Journal of Minerals,Metallurgy and Materials 2022年第5期29卷 1037-1052页

作者： Ke Guo Wei wang Shuqiang jiao Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

Potassium-ion batteries(PIBs),also known as“novel post-lithium-ion batteries,”have promising energy storage and utilization prospects due to their abundant and inexpensive raw *** anode materials are critical for realizing high-performance PIBs because they are an important component determining the energy and power ***-dimensional(2D)layered anode materials with increased interlayer distances,specific surface areas,and more active sites are promising candidates for PIBs,which have a high reversible capacity in the energetic *** this review,we briefly summarize K+storage behaviors in 2D layered carbon,transition metal chalcogenides,and MXene materials and provide some suggestions on how to select and optimize appropriate 2D anode materials to achieve ideal electrochemical performance.

关键词： potassium-ion battery layered materials carbon transition metal chalcogenides MXene materials

The Establishment of an In Vivo HIV-1 Infection Model in Humanized B-NSG Mice

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Virologica Sinica 2020年第4期35卷 417-425页

作者： tian-jiao Fan Li Sun Xian-Guang Yang Xia Jin Wei-Wei Sun Jian-Hua wang CAS Key Laboratory of Molecular Virology and Immunology Institut Pasteur of ShanghaiChinese Academy of SciencesShanghai 200031China University of Chinese Academy of Sciences Beijing 100039China College of Life Science Henan Normal UniversityXinxiang 453007China

Suitable animal models for human immunodeficiency virus type 1(HIV-1)infection are important for elucidating viral pathogenesis and evaluating antiviral strategies in *** B-NSG(NOD-PrkdcscidIl2rgtm1/Bcge)mice that have severe immune defect phenotype are examined for the suitability of such a model in this *** peripheral blood mononuclear cells(PBMCs)were engrafted into B-NSG mice via mouse tail vein injection,and the repopulated human T-lymphocytes were observed at as early as 3-weeks post-transplantation in mouse peripheral blood and several *** humanized mice could be infected by HIV-1,and the infection recapitulated features of T-lymphocyte dynamic observed in HIV-1 infected humans,meanwhile the administration of combination antiretroviral therapy(cART)suppressed viral replication and restored T lymphocyte *** establishment of HIV-1 infected humanized B-NSG mice not only provides a model to study virus and T cell interplays,but also can be a useful tool to evaluate antiviral strategies.

关键词： Human immunodeficiency virus type 1(HIV-1) Animal model Acute infection B-NSG mice

Performance of TiC coating prepared by in situ conversion of organic carbon film on 316L bipolar plate

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Journal of Iron and Steel Research International 2023年第8期30卷 1562-1573页

作者： Wen-jiao Zhangl Yan-li wang School of Chemistry and Chemical Engineering Guangxi UniversityNanning 530004GuangxiChina

TiC coating on 316L stainless steel surface is prepared by molten salt disproportionation reaction by using carbon layer converted from organic carbon solution as carbon *** Raman and morphology characterizations show that the carbon layer and TiC coating are successfully prepared on the surface of 316L stainless steel,the prepared carbon layer and 316L matrix have good adhesion,and the prepared TiC coating is smooth and *** the simulated cathodic environment of the proton exchange membrane fuel cell,the potentiostatic and potentiodynamic polarization measurements show that the TiC coating has smaller and more stable current density fluctuation than the 316L stainless steel substrate,and the electrochemical impedance test lasting for 275 h still shows better stable corrosion resistance than that of the 316L stainless steel ***,in the water contact angle and interface contact resistance tests,the TiC coating consistently maintained better hydrophobicity and lower interface contact resistance values than 316L stainless steel.

关键词： Bipolar plate Proton exchange membrane fuel cell TiC coating Disproportionation reaction Corrosion resistance

Evaluation Model of Design for Operation and Architecture of Hierarchical Virtual Simulation for Flight Vehicle Design

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Chinese Journal of Aeronautics 2012年第2期25卷 216-226页

作者： LIU Hua tian Yongliang ZHANG Chaoying YIN jiao SUN Yijie School of Aeronautic Science and Engineering Beihang University Beijing 100191 China Institute for Aviation Safety China Academy of Civil Aviation Science and Technology Beijing 100028 China

In order to take requirements for commercial operations or military missions into better consideration in new flight vehicle design, a tri-hierarchical task classification model of ＂design for operation＂ is proposed, which takes basic man-object interaction task, complex collaborative operation and large-scale joint operation into account. The corresponding general architecture of evaluation criteria is also depicted. Then a virtual simulation-based approach to implement the evaluations at three hierarchy levels is mainly analyzed with a detailed example, which validates the feasibility and effectiveness of evaluation architecture. Finally, extending the virtual simulation architecture from design to operation training is discussed.

关键词： flight vehicle design operation virtual simulation training evaluation model

Design study of APS-U-type hybrid-MBA lattice for mid-energy DLSR

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Nuclear Science and Techniques 2021年第7期32卷 46-54页

作者： Yu Zhao Yi jiao Sheng wang Institute of High Energy Physics(IHEP) Chinese Academy of Sciences(CAS)Beijing 100049China University of Chinese Academy of Sciences(UCAS) Beijing 100049China Spallation Neutron Source Science Center(SNSSC) Dongguan 523803China

In recent years,a new generation of storage ring-based light sources,known as diffraction-limited storage rings(DLSRs),whose emittance approaches the diffraction limit for the range of X-ray wavelengths of interest to the scientific community,has garnered significant attention *** have begun to design and build *** various DLSR proposals,the hybrid multibend achromat(H-MBA)lattice enables sextupole strengths to be maintained at a reasonable level when minimizing the emittance;hence,it has been adopted in many DLSR *** on the H-7BA lattice,the design of the Advanced Photon Source Upgrade Project(APS-U)can effectively reduce emittance by replacing six quadrupoles with ***,we discuss the feasibility of designing an APS-U-type H-MBA lattice for the Southern Advanced Photon Source,a mid-energy DLSR light source with ultralow emittance that has been proposed to be built adjacent to the China Spallation Neutron *** linear and nonlinear dynamics are optimized to obtain a detailed design of this type of *** emittance is minimized,while a sufficiently large dynamic aperture(DA)and momentum acceptance(MA)are maintained.A design comprising 36 APS-U type H-7BAs,with an energy of 3 GeV and a circumference of 972 m,is *** horizontal natural emittance is 20 pm·rad,with a horizontal DA of 5.8 mm,a vertical DA of 4.5 mm,and an MA of 4%,as well as a long longitudinal damping time of 120 ***,a few modifications are performed based on the APS-U-type lattice to reduce the maximum value of damping time from 120 to 44 ms while maintaining other performance parameters at the same level.

关键词： Southern advanced photon source(SAPS) Diffraction-limited storage ring(DLSR) Hybrid multibend achromat(H-MBA) Advanced photon source upgrade project(APS-U) Lattice design

Tailoring edge and interface states in topological metastructures exhibiting the acoustic valley Hall effect

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Science China(Physics,Mechanics & Astronomy) 2020年第2期63卷 82-92页

作者： jiao wang Yang Huang WeiQiu Chen Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province Department of Engineering MechanicsZhejiang UniversityHangzhou 310027China State Key Lab of CAD&CG Zhejiang UniversityHangzhou 310058China Soft Matter Research Center Zhejiang UniversityHangzhou 310027China

In this study, we investigate the acoustic topological insulator or topological metastructure, where an acoustic wave can exist only in an edge or interface state instead of propagating in bulk. Breaking the structural symmetry enables the opening of the Dirac cone in the band structure and the generation of a new band gap, wherein a topological edge or interface state ***, we systematically analyze two types of topological states that stem from the acoustic valley Hall effect mechanism;one type is confined to the boundary, whereas the other type can be observed at the interface between two topologically different structures. Results denote that the selection of different boundaries along with appropriately designed interfaces provides the acoustic waves in the band gap range with abilities of one-way propagation, dual-channel propagation, immunity from backscattering at sharp corners, and/or transition between propagation at interfaces and boundaries. Furthermore, we show that the acoustic wave propagation paths can be tailored in diverse and arbitrary ways by combing the two aforementioned types of topological states.

关键词： acoustic crystals valley Hall effect edge states interface states Dirac cone