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Current Reversal Due to Coupling Between Asymmetrical Driving Force and Ratchet Potential

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Communications in Theoretical Physics 2006年第4期45卷 637-640页

作者： ai bao-quan XIE Hui-Zhang LIU Liang-Gang School of Physics and Telecommunication Engineering South China Normal University Guangzhou 510631 China Department of Physics South China University of Technology Guangzhou 510641 China Department of Physics Zhongshan University Guangzhou 510275 China

Transport of a Brownian particle moving in a periodic potential is investigated in the presence of an asymmetric unbiased external force. The asymmetry of the external force and the asymmetry of the potentlal are the two ways of inducing a net current. It is found that the competition of the spatial asymmetry of potential with the temporal asymmetry of the external force leads to the phenomena like current reversal The competition between the two opposite driving factors is a necessary but not a sufficient condition for current reversals.

关键词： current reversal correlation ratchet competition

The Influence of the Renormalization Condition to the Equation of State of the Nuclear Matter

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Communications in Theoretical Physics 2001年第7期36卷 65-70页

作者： CHEN Wei ai bao-quan ZHENG Xiao-Ping LIU Liang-Gang Department of Physics Zhongshan University Guangzhou 510275 China Department of Physics Zhongshan University Guangzhou 510275 China Department of Physics Zhongshan University Guangzhou 510275 China Department of Physics Zhongshan University Guangzhou 510275 China

In the relativistic σ-ω model, the influences of the parameters b, c, d in the potential U(σ) = (1/2!)bo2 -+-(1/3!)cσ3+(1/4!)dσ4 to the incompressibility, effective mass and binding energy of the nuclear matter are studied in *** calculation of equation of state of nuclear matter shows that the values of b, c, d depend on the renormalization condition, we also find that a soft equation of state of nuclear matter can be obtained in a suitable renormalization condition, and the experimental incompressibility coefficient can be reproduced. These results are also used to study the thermal properties of hot A-resonant nuclear ***-interaction of σ meson, renormalization, hot and dense hadronic matter

关键词： equation of state,

Noise Effects on Oscillator Network of Transcription Regulators

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Communications in Theoretical Physics 2002年第10期38卷 497-502页

作者： WANG Xian-Ju ai bao-quan LIU Guo-Tao LIU Liang-Gang Department of Physics Zhongshan University Guangzhou 510275 China Department of Physics Zhongshan University Guangzhou 510275 China Department of Physics Zhongshan University Guangzhou 510275 China Department of Physics Zhongshan University Guangzhou 510275 China

Based on the model describing the regulation of the PRM operator region of λ phage proposed by Jeff Hastyet al., we study the noise effects on the oscillator network. We find that the additive noise cannot change the period andthe amplitude of the relaxation oscillator, but in the multiplicative case, the period of the relaxation oscillator increasesto a constant value with the increase of the strength of noise, and the amplitude of the relaxation oscillator also showsincreases with the increase of the strength of noise. This novel results suggest that an external multiplicative noise sourcecould be used to control gene expression.

关键词： gene control, noise strength, oscillator

Noise-Induced Transition in a Voltage-Controlled Oscillator Neuron Model

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Communications in Theoretical Physics 2008年第7期50卷 257-260页

作者： XIE Hui-Zhang LIU Xue-Mei ai bao-quan LIU Liang-Gang LI Zhi-Bing Department of Physics Sun Yat-Sen University Guangzhou 510275 China School of Physics South China University of Technology Guangzhou 510640 China School of Physics and Telecommunication Engineering South China Normal University Guangzhou 510631 China Faculty of Information Technology Macao University of Science and Technology Macao China

In the presence of Gaussian white noise,we study the properties of voltage-controlled oscillator neuronmodel and discuss the effects of the additive and multiplicative *** is found that the additive noise can accelerate andcounterwork the firing of neuron,which depends on the value of central frequency of neuron itself,while multiplicativenoise can induce the continuous change or mutation of membrane potential.

关键词： Gaussian white noise transition voltage-controlled oscillator neuron model

Relativistic Spin-Isospin Dependent Response Function of Nucleus

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Chinese Physics Letters 2000年第9期17卷 652-654页

作者： LIU Liang-Gang CHEN Wei ai bao-quan ZHENG Xiao-Ping Masahiro Nakano Department of Physics Zhongshan UniversityGuangzhou 510275 Masahiro Nakano University of Occupational and Environmental Health Kitakyusyu 807 Japan

A full relativistic formalism is employed to derive the relativistic particle-hole and delta-hole excitation polariza tion insertion of pion propagator in nuclear *** spin-isospin-dependent response function of nucleus at high energy-momentum transfer is calculated with the nuclear matter *** short range correlation effect,two-nucleon absorption and nucleus form factor effects are included in the *** position and width of the resonance peak of the spin-isospin mode are reproduced and found to be coincident with experiment *** position of the peak and its width is sensitive to Landau-Migdal parameter g'which is about 0.6.

关键词： calculation relativistic momentum

可形变自驱动粒子在不对称周期管中的定向输运

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物理学报 2023年第20期72卷 122-128页

作者：郭瑞雪艾保全华南师范大学物理学院广州510006

粒子的随机运动被整流为定向运动是非平衡统计物理的重要研究内容.尽管如此,在活性粒子整流的研究中,粒子通常被视为刚性的.然而,在软物质中,粒子通常具有可变形的性质.本文重点探讨了可形变自驱动粒子在非对称周期通道中的定向运输行为... 详细信息

粒子的随机运动被整流为定向运动是非平衡统计物理的重要研究内容.尽管如此,在活性粒子整流的研究中,粒子通常被视为刚性的.然而,在软物质中,粒子通常具有可变形的性质.本文重点探讨了可形变自驱动粒子在非对称周期通道中的定向运输行为.由于这些粒子具有可变形的特性,它们可以通过比自身小的通道.本文通过数值计算发现,可形变自驱动粒子能够打破热力学平衡,在空间不对称的条件下产生定向运动.粒子的集体运动方向完全由通道的不对称性决定.本文还发现,增加自驱动速度和粒子软化都能促进粒子的整流,而增大密度和旋转扩散则会阻碍粒子的定向运动.本文的研究成果有助于理解可形变粒子在受限结构中的定向运动行为,并为相关软物质马达的实验研究提供理论支持.

关键词：布朗马达可形变自驱动粒子不对称周期管

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机器学习回归不确定性揭示自驱动活性粒子的群集相变

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物理学报 2023年第20期72卷 114-121页

作者：郭唯琛艾保全贺亮华南师范大学物理学院理论物理研究所广州510006

本文发展了一种利用逆统计问题中的回归不确定性来自动探索物质相的新方法.以自驱动活性粒子的群集相变为例,展示了对于这一类涉及非平衡、非晶格、一阶相变等复杂要素的多体系统,在训练人工神经网络处理其中的逆统计问题回归任务,成功... 详细信息

本文发展了一种利用逆统计问题中的回归不确定性来自动探索物质相的新方法.以自驱动活性粒子的群集相变为例,展示了对于这一类涉及非平衡、非晶格、一阶相变等复杂要素的多体系统,在训练人工神经网络处理其中的逆统计问题回归任务,成功重构出系统的噪声强度这一参数之后,回归结果的不确定性关于实际噪声强度的分布具有非平庸的规律性,可用于揭示该系统中的群集相变,并自动提取相变的临界噪声强度.本文还与两种基于神经网络分类能力的常见方法进行直接对比,讨论了它们的异同和各自特点.结果表明,本文发展的新方法不仅具有使用效率较高和所需预设的物理知识较少等实用优势,而且更有在理论层面较为自然地与传统物理概念建立联系的可能性,对于跨领域的不同物理系统都有良好的通用性和有效性.

关键词：机器学习相变非平衡多体系统逆统计问题

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吸湿排汗涤纶短纤维的生产与性能

合成纤维 2005年第6期34卷 27-28,31页

作者：艾宝泉洛阳石油化工总厂中空纤维车间洛阳471012

概述了扁十字吸湿排汗涤纶短纤维的制备方法,讨论了喷丝板、纺丝、拉伸、热定型等工艺条件对产品质量的影响,对吸湿排汗纤维织物的性能进行了比较。

关键词：吸湿排汗涤纶短纤维制备方法产品质量喷丝板结构拉伸比吸湿快干性能

Genetic variation of the 8-kDa glycoprotein family from Echinococcus granulosus, Taenia multiceps and Taenia hydatigena

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Chinese Medical Journal 2011年第18期124卷 2849-2856页

作者： JIA Wan-zhong YAN Hong-bin LOU Zhong-zi NI Xing-wei LIU Hong-xia LI Hong-min GUO ai-jiang FU bao-quan State Key Laboratory of Veterinary Etiological Biology KeyLaboratory of Veterinary Parasitology of Gansu Province KeyLaboratory of Veterinary Public Health of Ministry of AgricultureLanzhou Veterinary Research Institute Chinese Academy ofAgricultural Sciences Lanzhou Gansu 730046 China

Background Echinococcosis, coenurosis and cysticercosis are debilitating diseases which prevail in China. Immunological diagnosis of metacestodosis is important in disease control. The 8-kDa glycoproteins from taeniid cestodes have successfully been used for diagnosis of human cysticercosis in immunological assays. The aim of the present study was to investigate genetic variations and phylogenetic relationships of the 8-kDa proteins for evaluating the possibility of utilizing these proteins as diagnostic antigens for other metacestode infections. Methods The genes and complementary DNAs （cDNAs） encoding the 8-kDa proteins from Echinococcus （E.） granulosus, Taenia （T.） multiceps and T. hydatigena were amplified using PCR method. Their amplicons were cloned into the vector pMD18 and the positive clones were sequenced. Sequence data were analyzed with the SeqMan program, and sequence homology searches were performed using the BLAST program. Alignments were conducted using the ClustalX program, and the phylogenetic analyses were performed with the Protein Sequences Program and the Puzzle Program using the Neighbor-joining method. Results Fifteen, 18 and 22 different genomic DNA sequences were identified as members of the 8-kDa protein gene family from E. granulosus, T. multiceps and T. hydatigena, respectively. Eight, four and six different cDNA clones respectively from E. granulosus, T. multiceps and T. hydatigena were characterized. Analysis of these sequences revealed 54 unique 8-kDa protein sequences. Phylogenetic trees demonstrated that the taeniid 8-kDa proteins are clustered into eight clades at least： Ts18, Ts14, TsRS1, TsRS2, T8kDa-1, T8kDa-2, T8kDa-3 and T8kDa-4. Conclusion We found that the gene family encoding for the taeniid 8-kDa antigens is comprised of many members with high diversity, which will provide molecular evidence for cross-reaction or specific reaction among metacestode infections and may contribute to the development of promising immunological

关键词： Echinococcus granulosus Taenia multiceps Taenia hydatigena 8-kDa glycoprotein genetic variation