检索结果-南通市图书馆

Controllability of shock waves in one-dimensional polariton condensates

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2023年第6期75卷 3-10页

作者： Qi-wen Wang jin-ling Wang wen wen ji Lin Hui-jun Li Institute of Nonlinear Physics and Department of Physics Zhejiang Normal UniversityJinhua321004 ZhejiangChina College of Science Hohai UniversityNanjingJiangsu 210098China

In one-dimensional incoherent pumped exciton-polariton condensates,we realize the generation and control of supersonic shock *** choosing a suitable initial input wave,we obtain the region of existence of various shock waves as a function of the phase of the initial wave,the coefficient of polariton interaction,the coefficient of the interaction between polariton and reservoir and the condensation rate and intensity of *** these results,we discuss the effect of different parameters on shock waves composed of two shock waves,and find that the gain and loss will result in a sloping platform between two *** addition,we also consider the effect of the non-adiabatic approximation and the diffusion coefficient of the reservoir on the profiles of the shock *** find that the non-adiabatic approximation will result in some small oscillations on the uniform background,and the platform between two waves becomes flat;however,the diffusion effect of the reservoir will clear these small oscillations and tilt the *** results may pave the way to control shock waves in an incoherent pumped exciton-polariton system.

关键词： shock wave exciton-polariton condensate saturated nonlinearity

Estimation of plasma density perturbation from dusty plasma injection by laser irradiation on tungsten target in DiPS

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2020年第4期22卷 90-96页

作者： In Je KANG min-Keun BAE In Sun PARK min ji LEE Kyu-Sun CHUNG Department of Electrical Engineering Hanyang UniversitySeoul 133791Republic of Korea Plasma Technology Research Center National Fusion Research InstituteGunsan 54004Republic of Korea

To investigate the interaction of dusty plasma with magnetized plasmas at divertor plasma simulator,radial profiles of plasma density(ne)and electron temperature were measured in terms of plasma discharge currents and magnetic flux intensity by using a fast scanning probes system with triple *** plasma with dusts(a generation rate of 3μg s-1 and a size of 1–10μm)was produced via interactions between a high-power laser beam and a full tungsten *** ne increases,the scale of the effects of dusty plasma injection on magnetized plasmas was ***,the duration of transient fluctuation was *** numerical estimation of plasma density perturbation due to dusty plasma injection,the result was 10%at a core region of the magnetized plasma with ne of(2–5)×10^11 cm^-3 at steady state condition.

关键词： plasma density perturbation dusty plasma tungsten dust DiPS

Theoretical predict structure and property of the novel CL-20/2,4-DNI cocrystal by systematic search approach

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2022年第6期18卷 907-917页

作者： Hao-jie Li jian-chao Liu Li Yang Zhen-zhan Yan Yue-wen Lu ji-min Han Xiao-ting Ren Wei Li State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081China Science and Technology on Aerospace Chemical Power Laboratory Hubei Institute of Aerospace ChemotechnologyXiangyang441003HubeiChina

Cocrystallization integrates the merits of high energy and insensitivity between energetic molecules to obtain energetics with satisfying ***,how to obtain supramolecular synthons accurately and rapidly for predicting the structure and property of cocrystal remains a challenging *** this research,an efficient systematic search approach to predict CL-20/2,4-DNI cocrystal has been proposed that 2,4-DNI revolves around CL-20 with a stoichiometric ratio of 1:1 in accordance with the specified rules(hydrogen bond length:2.2-3.0 Å;search radius:6.5 Å;the number of hydrogen bond:1-3).Eight possible supramolecular synthons were obtained by combining quantum chemistry with molecular *** structure prediction indicated that there are four structures in cocrystal,namely P21/c,P212121,Pbca and Pna21,and CL-20/2,4-DNI cocrystal is likely to be P21/c and the corresponding cell parameters are Z=4,a=8.28 Å,b=12.17 Å,c=20.42 Å,α=90°,β=96.94°,γ=90°,and ρ=1.9353 g/cm^(3).To further study the intermolecular interaction of CL-20/2,4-DNI cocrystal,a series of theoretical analyses were employed including intermolecular interaction energy,electrostatic potential(ESP),Density of State(DOS),Hirshfeld surface *** C-H…O hydrogen bonds are demonstrated as the predominant driving forces in the cocrystal *** mechanical properties and detonation properties of CL-20/2,4-DNI cocrystal implies that the cocrystal shows better ductility and excellent detonation performances(9257 m/s,39.27 GPa)and can serve as a promising energetic *** structure predicted was compared with the experimental one to verify the accuracy of systematic search *** is a less than 8.8%error between experiment and predict results,indicating the systematic search approach has extremely high reliability and *** systematic search approach can be a new strategy to search supramolecular synthons and identify structures effectively and does have t

关键词： CL-20 2,4-DNI Cocrystal Intermolecular interaction Systematic search

Integration of naval distributed tactical training simulation system based on advanced message queuing protocol

在线全文

学校读者我要写书评

暂无评论

High Technology Letters 2016年第4期22卷 385-394页

作者：柳玉 wen jiayan ji Daqin The Scientific Research Department Naval Marine Academy

Aiming at the problems of unreliable data transmission,poor steadiness,nonsupport of complex data types,direct couple between data transmission and exchange,a high-level method based on advanced message queuing protocol( AMQP) is proposed to integrate naval distributed tactical training simulation system after serious consideration with current information exchange features of military combat system. Transferring layer in traditional user datagram protocol is implemented by publishing and subscribing scheme of message middleware. By creating message model to standardize message structure,integration architecture is formulated to resolve potential information security risks from inconsistent data type and express data transmission. Meanwhile,a communication model is put forward based on AMQP,which is in the center position of the whole transmission framework and responsible for reliably transferring battlefield data among subsystems. Experiments show that the method can accurately post amounts of data to the subscriber without error and loss,and can get excellent real-time performance of data exchange.

关键词： tactical simulation message middleware advanced message queuing protocol(AMQP) software architecture distributed interactive simulation

Liquid metal welding enabling high loading binder/carbon-free layered oxide cathode toward high-performance liquid and solid-state battery

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2023年第5期42卷 1583-1593页

作者： Xiang Han Lan-Hui Gu min Xu min-Feng Chen ji-Zhang Chen College of Materials Science and Engineering Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesNanjing Forestry UniversityNanjing210037China

High loading cathode with high active material proportion is a practical demand but far below the desirable value to achieve high energy density lithium-ion batteries(LIBs).Normally,the Li^(+)/electron transport between active materials and electrolyte/c arbon,however,it is poor and areal resistance is extremely high for a high loading/thick *** this manuscript,taking high-voltage lithium cobalt oxide LiCoO_(2)(LCO)as an example,we design a facile liquid metal welding method enabled by a low melting-point indium-tin oxide In_(2)O_(3)/SnO_(2)(ITO)during a thermal treatment process,the strongly adhesion active particles show robust mechanical property for the free-standing LCO cathode with a pellet *** also demonstrate that the O_(2)atmosphere plays a critical role on the interfacial property,that is preventing the layered structure to rock-salt Co_(3)O_(4)as well as further enhancing the interfacial mechanical *** expected,the LCO-ITO free-standing cathode not only shows robust mechanical property with densely packed configuration but also provides a fast Li^(+)/electron pathway at the ***,the LCO-ITO composite cathode exhibits excellent electrochemical cycling performance in both liquid and solid-state *** example,even at a high active material mass of 56 mg·cm^(-2),the LCO cathode still delivers a specific capacity of 151 mAh·g^(-1)and maintains132.5 mAh·g^(-1)(corresponding to 7.4 mAh·cm^(-2))after *** LCO-ITO-O_(2)cathode is also applicable to a solidstate cell,which exhibits a high capacity of 100.4 mAh·g^(-1)after 200 cycles of long-term *** excellent electrochemical of the LCO-ITO-O_(2)reveals the successful engineering mechanical architecture and interfacial carriers transport,which may be expected as an alternative approach to achieve high energy density LIBs.

关键词： Lithium-ion battery(LIB) High loading cathode Liquid metal welding Mechanical property Interfacial carriers transport

Index-free triangle-based graph local clustering

在线全文

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2024年第3期18卷 143-153页

作者： Zhe YUAN Zhewei WEI Fangrui LV ji-Rong wen The Country and Area Studies Academy Beijing Foreign Studies UniversityBeijing 100089China Gaoling School of Artificial Intelligence Renmin University of ChinaBeijing 100872China

Motif-based graph local clustering(MGLC)is a popular method for graph mining tasks due to its various ***,the traditional two-phase approach of precomputing motif weights before performing local clustering loses locality and is impractical for large *** some attempts have been made to address the efficiency bottleneck,there is still no applicable algorithm for large scale graphs with billions of *** this paper,we propose a purely local and index-free method called Index-free Triangle-based Graph Local Clustering(TGLC^(*))to solve the MGLC problem w.r.t.a ***^(*)directly estimates the Personalized PageRank(PPR)vector using random walks with the desired triangleweighted distribution and proposes the clustering result using a standard sweep *** demonstrate TGLC^(*)’s scalability through theoretical analysis and its practical benefits through a novel visualization ***^(*)is the first algorithm to solve the MGLC problem without precomputing the motif *** experiments on seven real-world large-scale datasets show that TGLC^(*)is applicable and scalable for large graphs.

关键词： graph local clustering triangle motif index-free sampling method visualization

Powder metallurgy of high-entropy alloys and related composites: A short review

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of minerals,Metallurgy and Materials 2021年第6期28卷 931-943页

作者： Bo-ren Ke Yu-chen Sun Yong Zhang wen-rui Wang Wei-min Wang Pei-yan Ma Wei ji Zheng-yi Fu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Beijing Advanced Innovation Center of Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China School of Mechanical Engineering University of Science and Technology BeijingBeijing 100083China School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China School of Chemistry Chemical Engineering and Life ScienceWuhan University of TechnologyWuhan 430070China

High-entropy alloys(HEAs)have attracted increasing attention because of their unique properties,including high strength,hardness,chemical stability,and good wear *** metallurgy is one of the most important methods used to fabricate HEA *** paper introduces the methods used to synthesize HEA powders and consolidate HEA *** phase transformation,microstructural evolution,and mechanical properties of HEAs obtained by powder metallurgy are *** also address HEA-related materials such as ceramic–HEA cermets and HEA-based composites fabricated by powder metallurgy.

关键词： high-entropy alloys powder metallurgy mechanical alloying consolidation

Periodic codings of algebraic graph-directed IFS

在线全文

学校读者我要写书评

暂无评论

Science China Mathematics 2015年第1期58卷 131-142页

作者： wen Zhi Ying YANG Ya min Department of Mathematical Sciences Tsinghua University College of Science Huazhong Agricultural University

We study the points with periodic codings of a class of graph-directed iterated function systems on with algebraic parameters （which we call algebraic GIFS）. It is shown that the set of points with periodic codings is closely related to the Rauzy box. Especially for the feasible Pisot GIFS, this set is completely characterized by the Rauzy box; this result unifies and extends the previous results on the study of periodic points of classical and generalized β-transformations.

关键词： algebraic GIFS periodic coding Rauzy box

Standing Waves for Periodic Discrete Nonlinear Schrdinger Equations with Asymptotically Linear Terms

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2012年第2期28卷 351-360页

作者： wen-xiong Chen min-bo Yang School of Mathematical Science Huaqiao UniversityQuanzhou 362021FujianChina Department of Mathematics Zhejiang Normal University321004 JinhuaChina

In this paper we study the existence of nontrivial solutions for the periodic discrete nonlinear equation Lun-un=ωfn（un）,where Lun=an＋1un＋an-1un-1＋bnunis the discrete Laplacian in one spatial dimension. The given real-valued sequences an, bn are assumed to be N-periodic in n, i.e., an＋N =an, bn＋N = bn. The nonlinearity fn（t） is N-periodic in n and asymptotically linear at infinity. We show that, if ω is in the spectrum gap of L, there is a nontrivial solution. The proof is based on the strongly indefinite functional critical points theorem developed recently.

关键词： discrete Schrodinger equation critical point linking