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Absorption Cross Section of Static Einstein-Maxwell Dilation Axion Black Hole for Scalar Particles

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Communications in Theoretical Physics 2007年第4期47卷 665-668页

作者： LIU Chang-qing jing Ji-Liang Institute of Physics and Department of Physics Hunan Normal University Changsha 410081 China

The absorption cross section of the static Einstein-Maxwell dilaton axion （EMDA） black hole for scalar particles is investigated. It is shown that the ratio of the absorption cross section of the EMDA black hole to that of the Schwarzschild black hole decreases as the absolute value of the dilaton increases, and it becomes zero as the dilaton tends to its extremal value. It is also shown that the absorption cross section decreases as both the v and the absolute value of the dilaton increase, and it decreases as the mass of the particle decreases.

关键词： absorption cross section black hole dilaton

Cross-layer optimized Chord protocol for separated ring convergence in MANET

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The Journal of China Universities of Posts and Telecommunications 2009年第4期16卷 84-90页

作者： MEI jing-qing JI Hong LI Ting Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China

An optimized Chord protocol is proposed to solve the convergence problem for separated Chord rings over mobile Ad-hoc networks （MANETs）. This protocol exploits the information of topological neighbors in routing layer by utilizing a cross-layer design, and periodically detects whether there is any neighbor node that belongs to an alien Chord ring by sending detecting packets. The detection will be confirmed and then the corresponding predecessor node will be found out to initialize convergence of the Chord rings. Theoretical analysis and experiment results show that the proposed algorithm can detect separated Chord rings and implement the convergence process efficiently, and that a significant improvement in the successful lookup ratio is also achieved at an acceptable overhead for the system maintenance. Moreover, the proposed protocol can ensure the stability and scalability of the system.

关键词： convergence Chord mobile Ad-hoc network (MANET) cross-layer

Query routing mismatch alleviation architecture for P2P file lookup in MANETs

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The Journal of China Universities of Posts and Telecommunications 2011年第4期18卷 111-117页

作者： MEI jing-qing JI Hong LI Yi Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China

A cross-layer optimized query routing mismatch alleviation （QRMA） architecture is proposed to mitigate the problem of query routing mismatch （QRM） phenomenon between the structured peer to peer （P2P） overlay and the routing layer in mobile Ad-hoc networks （MANETs）, which is an important issue that results in the inefficiency of lookup process in the system. Explicated with the representative Chord protocol, the proposal exploits the information of topologic neighbors in the routing layer of MANETs to find if there is any optimized alternative next hop in P2P overlay during conventional lookup progress. Once an alternative next hop is detected, it will take the shortcut to accelerate the query procedure and therefore alleviate the QRM problem in scalable MANETs without any assistance of affiliation equipments such as GPS device. The probability of finding out such an alternative node is formulated and the factors that could increase the chance are discussed. The simulation results show that the proposed architecture can effectively alleviate the QRM problem and significantly improve the system performance compared with the conventional mechanism.

关键词： query routing mismatch P2P overlay Chord MANETs

DETACHED EDDY SIMULATION OF HYDRAULIC CHARACTERISTICS ALONG THE SIDE-WALL AFTER A NEW ARRANGEMENT-SCHEME OF THE SUDDEN LATERAL ENLARGEMENT AND THE VERTICAL DROP

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Journal of Hydrodynamics 2011年第5期23卷 669-675页

作者： LI Guo-jing DAI Guang-qing YANG qing MA Xu-dong State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University Chengdu 610065 China

In order to study the cavitation damage in a side-wall when a sudden lateral enlargement and a vertical drop are imposed at the radial gate, a new arrangement-scheme is proposed, where the sudden lateral enlargement and the vertical drop can be imposed at the outlet of the gate chamber. The hydraulic characteristics along the side-wall are simulated by the detached eddy simulation and the Volume Of Fluid （VOF） method. The numerical results agree well with those of experiment. The experimental and numerical results show that the flow condition is smooth with only a weak water-wing appearing behind the lateral cavity, and the length of the lateral cavity becomes longer and is mainly affected by the size of the lateral enlargement and the zone of negative pressure after the water impacts the side-wall would disappear. The hydraulic characteristics of the new arrangement-scheme are beneficial to the prevention of the cavitation damage in the side-wall and the Detached Eddy Simulation （DES） with the VOF method can well predict the hydraulic characteristics after the new arrangement-scheme of the sudden lateral enlargement and the vertical drop.

关键词： model test aeration to prevent cavitation damage realizable k - ε turbulent model Detached Eddy Simulation (DES) Volume Of Fluid (VOF) method

In-line Plasma-induced Graft-copolymerization of Pentaerythritol Triacrylate onto Polypropylene

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Chinese Journal of Polymer Science 2018年第8期36卷 979-983页

作者： Gui-Qiu Ma Guan-Kai Sun Zhe Ma jing-qing Li jing Sheng Department of Polymer Material Science and Engineering Institute of Advanced Polymer MaterialsSchool of Material Science and EngineeringTianjin Key Laboratory of Composite and Functional MaterialsTianjin University

Pentaerythritol triacrylate （PETA） was successfully grafted onto the plasma-treated isotactic polypropylene （iPP） via the in situ melt processing. The X-ray photoelectron spectroscopy （XPS） results showed that the hydroxyl and carbonyl groups, and peroxides could be generated via plasma treatment. The content of free radical in plasma-treated iPP （PiPP） was measured by 2,2-diphenyl-1- picrylhydrazyl （DPPH）. It was found that the resulting peroxides induced the grafting copolymerization of PETA onto iPP, and the grafted PETA promoted the formation of β-crystal in PiPP, which was evidenced by Fourier transform infrared spectroscopy （FTIR）, differential scanning calorimetry （DSC） and wide-angle X-ray diffraction （WAXD） measurements, respectively.

关键词： Plasma treatment Melt processing Graft copolymerization Pentaerythritol triacrylate

Single-cell transcriptomics of murine mural cells reveals cellular heterogeneity

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Science China(Life Sciences) 2021年第7期64卷 1077-1086页

作者： Ya-Na Guan Yue Li Moom Roosan qing jing Shanghai Jiao Tong University School of Medicine(SJTUSM)&CAS Key Laboratory of Tissue Microenvironment and Tumor Shanghai Institute of Nutrition and HealthChinese Academy of Sciences(CAS)Shanghai 200031China Chapman University IrvineCA 92618USA

Mural cells(MCs)wrap around the endothelium,and participate in the development and homeostasis of *** have been reported as heterogeneous population morphologically and ***,the transcriptional heterogeneity of MCs was rarely *** this study,we illustrated the transcriptional heterogeneity of MCs with different perspectives by using publicly available single-cell dataset ***,MCs are transcriptionally different from other cell types,and ligand-receptor interactions of different cells with MCs ***-clustering of MCs identified five distinct *** heterogeneity of MCs in tissues was reflected by MC coverage,various distribution of MC subclusters,and ligand-receptor interactions of MCs and parenchymal *** transcriptomic diversity of MCs revealed in this article will help facilitate further research into MCs.

关键词： mural cells single-cell analysis heterogeneity

Study on Ductility Dip Cracking susceptibility in Filler Metal 82 during welding

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Frontiers of Materials Science 2011年第2期5卷 203-208页

作者： jing-qing CHEN Hao LU Wei CUI School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China

In this paper, Ductility Dip Cracking （DDC） susceptibility in Inconel600 companion Filler Metal 82 （FM82） under different stress states is investigated. Inconel600 is a Ni-Cr-Fe alloy with excellent resistance to general corrosion, localized corrosion, and stress corrosion, which has been widely used in nuclear power plants. However, the companion FM82 has been shown to be susceptible to DDC in welding process. To resolve the problem, this work is mainly focused on evaluating DDC susceptibility in FM82 in welding process. First of all, Strain to Fracture （STF） test is used to achieve the DDC criterion under simple stress state, and the formation mechanism of DDC was explained. Real welding is a process with complex stress state. Later, to get the DDC susceptibility under complex stress state, models about multi-pass welding were built up by means of finite element method. According to numerical simulation results, relationship of deformation and temperature history is achieved. Moreover, susceptible locations and moments could be determined associated with STF results. The simulation results fairly agree with welding experiment from another research.

关键词： Ductility Dip Cracking (ODC) welding inconel600 numerical simulation

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基于山海文化发掘的IP形象设计研究

绿色包装 2024年第9期 178-181页

作者：柴源张青荣周睿徐静青闫朝群江苏海洋大学江苏连云港222005

连云港特定的多元民族文化结构为其山海文化赋予了丰富内涵。本文立足于各地山海文化研究现状,思考地域文化融入高校IP形象设计创新问题,制定解决方案与实施策略。借助设计实践,开展高校形象宣传和文化推广研究,探索体现地域文化特色的... 详细信息

连云港特定的多元民族文化结构为其山海文化赋予了丰富内涵。本文立足于各地山海文化研究现状,思考地域文化融入高校IP形象设计创新问题,制定解决方案与实施策略。借助设计实践,开展高校形象宣传和文化推广研究,探索体现地域文化特色的高校IP角色形象设计思路,以及相关包装设计及衍生产品推广路径。意在深入挖掘地域性山海文化内核,借助现代艺术设计创新思路和方法,开展IP形象设计应用研究,以期为学界关于地域化IP形象设计的研究提供多项理论研究参考。

关键词：山海文化地域特色 IP设计高校形象

社会福利的测度与比较——基于不平等厌恶系数的研究方法

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统计学报 2024年第1期5卷 48-60页

作者：吴晴静章贵军王开科福建师范大学数学与统计学院福建福州350177 山东财经大学统计学院山东济南250011

基于不平等厌恶系数构建测度社会福利水平的新方法,利用2010—2020年五期CGSS数据测度优势不平等厌恶系数和劣势不平等厌恶系数,冗余分析结果显示测度方法有较好的效度。使用机器学习算法对区域和城乡福利水平特征进行探究,结果发现:虽... 详细信息

基于不平等厌恶系数构建测度社会福利水平的新方法,利用2010—2020年五期CGSS数据测度优势不平等厌恶系数和劣势不平等厌恶系数,冗余分析结果显示测度方法有较好的效度。使用机器学习算法对区域和城乡福利水平特征进行探究,结果发现:虽然社会福利水平总体在提高,但是存在发展不平衡的情况;城镇居民福利水平相对于农村而言,存在更为严重的阶层固化效应,并且马太指数、马太系数呈现均值回归特征;东部地区与中西部地区存在“福利鸿沟”,两者的福利水平差异随时间推移逐步扩大。

关键词：社会福利水平不平等厌恶系数马太效应 “福利鸿沟”