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Photoproduction of J/ ψ in pp and PbPb Collisions at Leading Order

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Chinese Physics Letters 2012年第8期29卷 65-68页

作者： ZHU Jia-Qing li yun-de department of physics Yunnan UniversityKunming 650091

The production of J/ψ originating from photoproduction processes in pp and PbPb collisions at leading order is *** use the color singlet and color octet mechanisms for heavy quarkonium production to deal with the direct photon processes,and consider fragmentation *** shadowing and iso-spin of the nucleus are also considered in our *** numerical results show that the modification of photoproduction processes for J/ψ production becomes obvious in the large pT region at LHC energy.

关键词： calculation processes energy

Real Photons Produced from Photoproduction in pp Collisions

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Chinese Physics Letters 2012年第10期29卷 31-34页

作者： FU Yong-Ping li yun-de department of Physics and Mathematics Lincang Teachers CollegeLincang 677000 department of Physics Yunnan UniversityKunming 650091

We calculate the production of real photons originating from the photoproduction in relativistic pp *** Weizsacker–Williams approximation in the photoproduction is *** results agree with the experimental data from the Relativistic Heavy Ion Collider and the Large Hadron *** find that the modification of the photoproduction is more prominent in large transverse momentum regions.

关键词： momentum Collisions transverse

Photoproduction of Large Transverse Momentum Dimuonium (μ^(+)μ^(−)) in Relativistic Heavy Ion Collisions

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Chinese Physics Letters 2013年第1期30卷 48-51页

作者： YU Gong-Ming li yun-de department of Physics Yunnan UniversityKunming 650091

The photoproduction processes of large transverse momentum(pT)dimuonium(μ^(+)μ^(-))in AA collisions is *** argue that the modification of electromagnetic radiation processes at large transverse momentum(p_(T)>2 GeV).Through perturbative quantum chromodynamics(pQCD)calculation,we determine the electromagnetic production cross section of large transverse momentum dimuonium(μ^(+)μ^(-))in quark-gluon plasma(QGP)at RHIC and *** numerical results indicate that the contribution of photoproduction processes of dimuonium is evident in relativistic heavy ion collisions at RHIC energies and LHC energies.

关键词： momentum transverse quark

A new benzofuranolignan and a new flavonol derivative from the stem of Morus australis

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Chinese Chemical Letters 2008年第2期19卷 196-198页

作者： Qing Jian Zhang Di Zao li Ruo yun Chen de Quan Yu The Key laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine Ministry of Education Institute of Materia Medica Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100050 China

A new benzofuranolignan austrafuran A （1） and a new flavonol derivative 5,7,2′,4′-tetrahydroxy-3-methoxyflavone （2） were isolated from the stem of Morus australis. Their structures were determined on the basis o... 详细信息

关键词： Morus australis Austrafuran A Flavonol Stilbenoid

J/ψ and γ Photoproduction in Pb-Pb Collisions at Large Hadron Collider

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Chinese Physics Letters 1996年第7期13卷 512-515页

作者： liU lian-shou li yun-de Institute of Particle Physics Huazhong Normal UniversityWuhan 430070

Hard photoproduction of J/ψandγat large hadron collider Pb-Pb collisions with center of mass energy 6300AGeV is discussed in the process Pb+Pb→Pb+J/ψ(Γ)+X with three types of equivalent photon spectrum *** turns out that in hard photoproduction the J/ψcross section is dominated by the gluon and heavy quark fragmentation,especially the gluon fragmentation is very important at large pt,while theγcross section is dominated by the leading order *** may be conclude from the result that the hard photoproduction processes can be used to test several important problems such as the gluon distribution in the nucleus,gluon and heavy quark fragmentation of J/ψ,and so *** addition the process also provide a new way of testing the EMC effects.

关键词： function process fragmentation

Effect of low-dose fenvalerate on semen quality capacitation in adult mice

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Chinese Medical Journal 2011年第10期124卷 1529-1533页

作者： SHI Xiao-dan BI Huan-jing FU He-ling li liang-yun liU de-kang li Jian-min Laboratory of Reproductive Medicine Department of Cell Biology and Medical Genetics Nanjing Medical University Nanjing Jiangsu 210029 China

Background Fenvalerate （FEN） has been demonstrated to be a reproductive toxicant in humans and rodents. However,little is known about whether short-term exposure to low-dose FEN produces reproductive *** We administered FEN （0.009 375, 0.1875, 3.750, or 45.00 mg·kg-1d-1 by gavage for 30 days） to male ICR mice and compared reproductive toxicity parameters between groups receiving different concentrations of *** toxicity was evaluated by computer-assisted semen quality analysis （CASA）, chlortetracycline （CTC） assay,and *** The sperm morphology and testis histology of FEN-exposed mice （all doses） were similar to that in controlling mice. Exposure to FEN at a concentration of 0.1875 mg·kg-1d-1 decreased sperm path straightness （STR） and linearity （liN）（both P〈 0.05）, but had no significant impact on average path velocity （VAP）, straight line velocity （VSL）, curvilinear velocity （VCL）, lateral amplitude （ALH）, beat cross frequency （BCF）, or progressive motility （MOT）. FEN reduced the rate of mouse sperm capacitation in a dose-dependent *** The present results demonstrate that exposure to low-dose FEN for 30 days reduces semen quality and sperm capacitation in adult mice.

关键词： fenvalerate capacitation computer-assisted sperm analysis, sperm

A Rigidity Measurement of Pseudo-Rapidity Spectrum of Produced Particles in High Energy Nucleus-Nucleus Collisions

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Chinese Physics Letters 1998年第8期15卷 566-567页

作者： ZHOU Dai-cui CAI XU li yun-de liU lian-shou QIAN Wan-yan WANG Xiao-rong YANG Chun-bin YAN Wen-biao Institute of Particle Physics Huazhong Normal UniversityWuhan 430079

A new concept,rigidity of pseudo-rapidity spectrum,is extended into the study of the multiplicity fluctuations in high energy nucleus-nucleus *** using the novel method to analyze the data of l6O-Em at 14.6,60,and 200A GeV,and ^(32)S-Em at 200A GeV,it is found that the rigidity of pseudo-rapidity spectrum in the central domain of pseudo-rapidity might be a mixture of Poisson type and Wigner one.

关键词： rigidity spectrum Collisions

基于时间延时估计和自适应模糊滑模控制器的双机械臂协同阻抗控制

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控制与决策 2021年第6期36卷 1311-1323页

作者：李德昀徐德刚桂卫华中南大学自动化学院长沙410083

多机械臂的精准协同控制已成为当前机器人领域的研究难点,为实现双机械臂精准控制,通过建立双机械臂动力学模型,采用时间延时估计简化机械臂动力学模型,在保证控制系统稳定性的前提下,引入自适应模糊滑模控制器实现对估计误差的修正和补... 详细信息

多机械臂的精准协同控制已成为当前机器人领域的研究难点,为实现双机械臂精准控制,通过建立双机械臂动力学模型,采用时间延时估计简化机械臂动力学模型,在保证控制系统稳定性的前提下,引入自适应模糊滑模控制器实现对估计误差的修正和补偿,设计基于时间延时估计和自适应模糊滑模控制的双机械臂协同阻抗控制器,实现双机械臂协同操作的末端轨迹控制以及接触力精准控制.最后,将该控制器应用于两台六自由度机械臂仿真平台,实现双臂夹取和搬运同一目标物体的操作,通过与其他控制器进行对比实验,表明所设计的控制器具有响应快、无抖震、精度高的特点.

关键词：双机械臂协同操作阻抗控制时间延时估计滑模控制模糊控制自适应控制

全混合日粮对肥育期的瘤胃发酵特性及其饲料消化率的影响

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黑龙江畜牧兽医 2006年第10期 16-20页

作者：李德允延边大学农学院吉林龙井133400

对肥育期的去势中国荷斯坦奶牛饲喂TMR和精、粗分离饲料后,试验组瘤胃内的乳酸浓度显著低于对照组(P<0.05)。试验组采食后6小时时的pH值及采食后3小时时的NH3N浓度显著高于对照组(P<0.05)。乙酸和丙酸在两处理组间无显著差异,而在0小时... 详细信息

对肥育期的去势中国荷斯坦奶牛饲喂TMR和精、粗分离饲料后,试验组瘤胃内的乳酸浓度显著低于对照组(P<0.05)。试验组采食后6小时时的pH值及采食后3小时时的NH3N浓度显著高于对照组(P<0.05)。乙酸和丙酸在两处理组间无显著差异,而在0小时和6小时时试验组丁酸极显著高于对照组(P<0.01),同时采食后9 h内试验组平均丁酸浓度极显著高于对照组(P<0.01)。另外,从采食后9 h内试验组平均乙酸/丙酸极显著高于对照组(P<0.01)。CMCase的活力在两处理组间无显著差异,而采食后9 h内试验组平均xylanase活力显著高于对照组(P<0.05)。总细菌数和总真菌数在试验组中表现出比对照组增加的倾向,特别是总细菌数在6小时时,总真菌数在6小时和9小时时,试验组显著高于对照组(P<0.05)。试验组粗蛋白质的消化率极显著高于对照组(P<0.01)。

关键词： TMR 瘤胃发酵酶的活性瘤胃微生物消化率