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基于SDH/ATM网络层间升级机制的研究

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计算机工程与应用 2001年第2期37卷 70-72页

作者：刘宴兵李秉智幸云辉重庆邮电学院计算机系重庆400065 北京邮电大学计算机学院北京100080

在一个分层的网络中，单一的恢复机制不可能满足宽带网络生存性的需要。如何协调SDH和ATM层之间恢复策略是一个急需解决的问题。该文提出几种可行的方案进行研究，并比较了它们的优缺点，这对如何设计一个有效的宽带可生存性网络提供了... 详细信息

在一个分层的网络中，单一的恢复机制不可能满足宽带网络生存性的需要。如何协调SDH和ATM层之间恢复策略是一个急需解决的问题。该文提出几种可行的方案进行研究，并比较了它们的优缺点，这对如何设计一个有效的宽带可生存性网络提供了参考依据。

关键词：升级 B-ISDN SDH ATM 网络层消息控制

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高速信元优先级交换调度策略定性研究

计算机工程与应用 2002年第7期38卷 143-144,153页

作者：刘宴兵李秉智幸云辉重庆邮电学院计算机系重庆400065 北京邮电大学北京100876

该文根据流平衡定律和排队理论用近似求解的方法对带优先级的信元调度策略进行了定性分析研究,推导得出了更加符合实际的解析式,并通过仿真和数值计算进行了验证。

关键词：高速信元优先级交换调度策略定性 ATM 交换机

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半固态流变成形通用性能试样模具设计

特种铸造及有色合金 2003年第2期23卷 42-44页

作者：张励忠杜云慧张鹏邢书明何书华刘金香焦众生北方交通大学石家庄车辆厂

针对半固态流变成形中存在液相偏析、显微疏松、充型不完整及夹渣等常见缺陷 ,详细研究并优化了压室尺寸与结构、料饼、浇道及其集渣、排气系统 ,并据此设计了一套材料性能试样半固态流变成形通用模具。该模具可用于各种常用合金的拉伸... 详细信息

针对半固态流变成形中存在液相偏析、显微疏松、充型不完整及夹渣等常见缺陷 ,详细研究并优化了压室尺寸与结构、料饼、浇道及其集渣、排气系统 ,并据此设计了一套材料性能试样半固态流变成形通用模具。该模具可用于各种常用合金的拉伸、冲击、疲劳、断裂韧性、摩擦磨损等多种性能试样的半固态流变成形。试验结果表明 ,经该模具挤铸出的试件 ,成品率达 98%以上 ,加工余量小于 3mm ,尺寸公差等级可达IT9,表面粗糙度Ra≤ 6.3 μm。

关键词：半固态流变成形性能检验模具

Stability and optoelectronic property of lead-free halide double perovskite Cs_(2)B′BiI_(6)(B′=Li,Na and K)

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Chinese Physics B 2021年第10期30卷 630-637页

作者： yunhui Liu Wei Wang Feng Xiao Liangbin Xiong xing Ming College of Science Guilin University of TechnologyGuilin 541004China School of Optoelectronic Engineering Guangdong Polytechnic Normal UniversityGuangzhou 510665China

Although lead-based perovskite solar cells have achieved more than 25%power conversion efficiency,the toxicity of lead and instability are still urgent problems faced in industrial ***-free halide double perovskite(DP)materials are promising candidates to resolve these *** on the density functional theory,we explore the geometric stability,thermodynamic stability,mechanical stability,electronic structures,and optical properties of theCs_(2)B 0BiI_(6)(B 0=Li,Na and K)DP *** analyzing the tolerance factor and octahedral factor,we find the geometric stabilities ofCs_(2)NaBiI_(6) andCs_(2)KBiI_(6) DPs are better thanCs_(2)LiBiI_(6).By calculating the total energy,formation energy and decomposition energy,we propose that the most favorable structure ofCs_(2)B 0BiI_(6) is the orthorhombic phase,andCs_(2)LiBiI_(6) is less stable relative to the other two counterparts from an energetic *** stability evaluations reveal that the orthorhombicCs_(2)LiBiI_(6) material is less stable relative to the isostructuralCs_(2)NaBiI_(6) andCs_(2)KBiI_(6) *** mechanical property calculations indicate that theCs_(2)B 0BiI_(6) DPs possess good ductility,which can be used as flexible *** structures and optical property calculations show that the orthorhombicCs_(2)B 0BiI_(6) DPs have suitable band gap values,weaker exciton binding energies,and excellent optical absorption performance in the visible-light *** on the above comprehensive assessments,we can conclude that the orthorhombic Cs_(2)NaBiI_(6) and Cs_(2)KBiI_(6) DPs with good stability are promising candidates for solar cell applications.

关键词： lead-free halide double perovskite solar cells stability optoelectronic property

Analysis of the mass of behind-armor debris generated by RHA subjected to normal penetration of variable cross-section EFP

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Defence Technology（防务技术） 2019年第3期15卷 390-397页

作者： Boyang xing Dongjiang Zhang Zhenyan Guo yunhui Hou Rui Guo Rongzhong Liu Liang Chen Hao Zhou Yongliang Yang Jianhua Luo School of Mechanical Engineering Nanjing University of Science and Technology Nanjing 210094 Jiangsu China Xi'an Modern Control Technology Research Institute Xi'an 710065 Shanxi China School of Electronic and Optical Engineering Nanjing University of Science and Technology Nanjing 210094 China

Analyzing the mass of behind-armor debris (BAD) generated by Rolled Homogeneous Armor (RHA) subjected to normal penetration of variable cross-section Explosively Formed Projectile (EFP) is the purpose of this paper. So theoretical analysis, numerical simulation and experimental data are combined to analyze the influence of variable cross-section characteristic on the time history of crater radius. Moreover the relationships between time history of crater radius (as well as mass of BAD) and the thickness of RHA (from 30mm to 70 mm) and the impact velocity of EFP (1650 m/s to 1860 m/s) are also investigated. The results indicate that: 1) being compared to the variable cross-section characteristic is ignored, the theoretical time history of crater radius is in better agreement with the simulation results when the variable cross-section characteristic is considered;2) being compared to the other three conditions of plug, the theoretical mass of BAD is in the best agreement with the simulation results when the shape of plug is frustum of a cone and the angle between generatrix and bottom is 45- and the axial length of mushroom is considered.

关键词： Explosively formed projectile Behind-armor debris Variable cross-section characteristic Shape of plug Axial length of mushroom Theoretical model

Uncovering the solid-phase conversion mechanism via a new range of organosulfur polymer composite cathodes for lithium-sulfur batteries

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Journal of Energy Chemistry 2023年第9期84卷 459-466页

作者： Xiang Li Dezhong Liu Ziyi Cao Yaqi Liao Zexiao Cheng Jie Chen Kai Yuan xing Lin Zhen Li yunhui Huang Lixia Yuan State Key Laboratory of Material Processing and Die&Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina

The sulfur cathodes operating via solid phase conversion of sulfur have natural advantages in suppressing polysulfide dissolution and lowering the electrolyte dosage,and thus realizing significant improvements in both cycle life and energy *** realize an ideal solid-phase conversion of sulfur,a deep understanding of the regulation path of reaction mechanism and a corresponding intentional material and/or cathode design are highly ***,via covalently fixing of sulfur onto the triallyl isocyanurate,a series of S-triallyl isocyanurate organosulfur polymer composites(STIs) are *** between the structure and the electrochemical conversion behavior of STIs is systematically *** is found that the structure of STIs varies with the synthetic temperature,and correspondingly the electrochemical redox of sulfur can be controlled from conventional "solid-liquid-solid" conversion to the "solid-solid" *** the STI series,the STI-5 composite realizes an ideal solid-phase conversion and demonstrates great potential for building a Li-S battery with high-energy density and long-cyclelife:it realizes stable cycling over 1000 cycles in carbonate electrolyte,with a degradation rate of0.053% per cycle;the corresponding pouch cell shows almost no capacity decay for 125 cycles under the conditions of high sulfur loading(4.5 mg cm^(-2)) and lean electrolyte(8 μL mg_s^(-1)).In addition,the tailoring strategy of STI can also apply to other precursors with allyl functional groups to develop new organosulfur polymers for "solid-solid" sulfur *** vulcanized triallyl phosphate(STP) and triallylamine(STA) both show great lithium storage *** strategy successfully develops a new family of organosulfur polymers as cathodes for Li-S batteries via solid-phase conversion of sulfur,and brings insights to the mechanism study in Li-S batteries.

关键词： Organosulfur polymer Lithium–sulfur batteries Allyl functional groups Reaction mechanism Solid–solid conversion

Blocking of the PD-1/PD-L1 interaction by a novel cyclic peptide inhibitor for cancer immunotherapy

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Science China(Life Sciences) 2021年第4期64卷 548-562页

作者： Wenjie Zhai Xiuman Zhou Mingxia Zhai Wanqiong Li yunhui Ran Yixuan Sun Jiangfeng Du Wenshan Zhao Lingxiao xing Yuanming Qi Yanfeng Gao School of Life Sciences Zhengzhou UniversingZhengzhou 450001China School of Pharmacenutical Sciences(Shenzhen) Sun Yar-sen UniversiyShenzhen 518107.China Deparment of Pathology Hebei Medical University Shijazhuang 050017China

The interaction of PD-1/PD-L1 allows tumor cells to escape from immune *** success of the antibody drugs has proven that blockade of PD-1/PD-L1 pathway is a promising strategy for cancer ***,we developed a cyclic peptide C8 by using Ph.D.-C7 C phage display technology.C8 showed high binding affinity with h PD-1 and could effectively interfere the interaction of PD-1/***,C8 could stimulate CD8^(+)T cell activation in human peripheral blood mononuclear cells(PBMCs).We also observed that C8 could suppress tumor growth in CT26 and B16-OVA,as well as anti-PD-1 antibody resistant B16 mouse ***8^(+)T cells infiltration significantly increased in tumor microenvironment,and IFN-γsecretion by CD8^(+)T cells in draining lymph nodes also ***,we exploited T cells depletion models and confirmed that C8 exerted anti-tumor effects via activating CD8^(+)T cells dependent *** interaction model of C8 with h PD-1 was simulated and confirmed by alanine *** conclusion,C8 shows anti-tumor capability by blockade of PD-1/PD-L1 interaction,and C8 may provide an alternative candidate for cancer immunotherapy.

关键词： PD-1/PD-L1 cancer immunotherapy immune checkpoint blockade cyclic peptide phage display CD8~+T cell

Rheologic behaviors of A356 aluminum alloy billet produced by semisolid continuous casting process

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China Foundry 2004年第1期1卷 62-66页

作者： Shuming xing Lizhong ZHANG yunhui DU Daben ZENG Jinlin TANG Department of Mechanical Engineering Beijing Jiaotong University Beijing 100044 P.R. China Department of Meclanical Engineering Tsinghua University Beijing 100084 P.R.China

The experiments for rheologic behaviors of semisolid continuous casting billets of A356 alloy in semisolid state had been carried out with a multifunctional rheometer. The results show that the deformation rate increases with loading time, the maximum strain reaches to 120％ (which is one time larger than that of traditional mold casting billet) and the strain can be rapidly eliminated to 10％ after unloading. Moreover, there is a critic stress for billet deformation even in semisolid state, which is named as critic shear stress. This stress increases with the decreasing of heating time. The theologic behaviors can be expressed by five elements mechanical model (H_2- [N_1|H_2]-[N_2|S]) and can be modified with the increasing of heating time.

关键词： semisolid continuous casting billet aluminum alloy rheologic behavior

Identification and characterization of Phytopythium helicoids causing stem rot of ’Shatangju’ mandarin seedlings in China

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Identification and characterization of Phytopythium helicoid...