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Finite dimensional irreducible representations of Lie superalgebra D(2,1;α)

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Communications in Theoretical Physics 2024年第2期76卷 14-28页

作者：陈曦杨文力丁祥茂张耀中 College of Intelligent Systems Science and Engineering Hubei Minzu University 445000China Institute of Modern Physics Northwest UniversityXian 710069China Institute of Applied Mathematics Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100080China School of Mathematics and Physics The University of QueenslandBrisbaneQLD 4072Australia

This paper focuses on the finite dimensional irreducible representations of Lie superalgebra D(2,1;α).We explicitly construct the finite dimensional representations of the superalgebra D(2,1;α)by using the shift operator and differential operator *** ordinary Lie algebra representation,there are typical and atypical representations for most ***,its typical and atypical representation conditions are also *** results are expected to be useful for the construction of primary fields of the corresponding current superalgebra of D(2,1;α).

关键词： superalgebra representations shift operator conformal field theory

A coordinated planning strategy of energy storage allocation and line upgrading to increase photovoltaic consumption with lowest planning cost

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Science China Technological Sciences 2025年

作者： Bo ZHANG Yuqi JI Lu ZHANG Wei TANG Xiaohui ZHANG Liang WANG Haoran ding Hanchen mao College of Information and Electrical Engineering China Agricultural University State Grid Heilongjiang Electric Power Research Institute State Grid Heilongjiang Electric Power Company Limited School of Electrical and Information Engineering Zhengzhou University of Light Industry

Random integration of massive distributed photovoltaic (PV) generation poses serious challenges to distribution networks. Voltage violations, line overloads, increased peak–valley differences, and power-flow reversals can occur at different locations, times, and severities. Traditional planning methods such as energy storage (ES) allocation and upgrading of lines may result in poor economics and low equipment utilization. This study proposes a distribution-network planning strategy that coordinates three planning mechanisms:ES allocation to substations and to feeders, and line upgrading. The proposed strategy achieved the lowest annual cost, considering the distribution network problems at different locations, times, and severities. A net load curve description method was first proposed considering economic planning and the uncertain distribution of loads and PVs. Second, a multistage optimization model for ES allocation and line upgrading was established based on the net load curves. Finally, an improved IEEE33 node system was used in the case study. The planning results show that the proposed coordinated planning strategy can address the problems caused by the random integration of massive distributed PVs, improve equipment utilization, and obtain the lowest total annual planning cost.

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Quantum Currents in the coset Space SU(2)/U(1)

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Communications in Theoretical Physics 2002年第1期37卷 59-62页

作者： ding xiang-mao Hou Bo-Yu Zhao Liu Institute of Modern Physics Northwest University Xi'an 710069 China

We propose a rational quantum deformed nonlocal currents in the homogeneous space SU(2)k/U(1), and in terms of it and a free boson field a representation for the Drinfeld currents of Yangian double at a general level k = c is obtained. In the classical limit h → 0, the quantum nonlocal currents become SU(2)k parafermion, and the realization of Yangian double becomes the parafermion realization of SU(2)k current algebra.

关键词：量子理论仿射李代数量子流 SU(2)/U(1)空间

新城疫病毒通过巨胞饮作用入侵HeLa细胞的研究

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中国兽医科学 2016年第11期46卷 1370-1375页

作者：张玉嫱谭磊詹媛仇旭升孙英杰孟春春宋翠萍廖瑛茅翔丁铲中国农业科学院上海兽医研究所上海200241

新城疫病毒(NDV)在体外可以感染多种细胞,但是感染机制尚未完全明确。本试验针对NDV通过巨胞饮途径感染He La细胞的过程进行研究,选择特异性针对巨胞饮作用的药物抑制剂5-(N-乙基-N-异丙基)-阿米洛利(EIPA)、肌动蛋白(actin)聚合作用抑... 详细信息

新城疫病毒(NDV)在体外可以感染多种细胞,但是感染机制尚未完全明确。本试验针对NDV通过巨胞饮途径感染He La细胞的过程进行研究,选择特异性针对巨胞饮作用的药物抑制剂5-(N-乙基-N-异丙基)-阿米洛利(EIPA)、肌动蛋白(actin)聚合作用抑制剂细胞松弛素D(Cyto D)、PK C激酶抑制剂卡马拉素(Rottlerin)等,分别作用于He La细胞,通过W estern-blot和间接免疫荧光试验(IFA)分别检测NDV感染He La细胞的情况。结果显示,在病毒感染后第3、6小时,EIPA能显著抑制NDV的进入,并且存在药物剂量的依赖性,同时,Cyto D和Rottlerin在第3、6和12小时也能显著抑制NDV的进入。结果表明,巨胞饮作用可能是NDV侵入细胞的一种重要途径,该结果将有助于进一步解析NDV的感染方式。

关键词：新城疫病毒巨胞饮病毒入胞

多层螺旋CT冠状动脉成像与冠状动脉造影对照研究

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医学影像学杂志 2004年第5期14卷 369-372页

作者：项敏毛定飚邱广平魏建功浙江省宁波市第二医院放射科浙江宁波315010 上海市华东医院放射科上海200040

目的 :评价 16层螺旋CT诊断冠状动脉疾病的准确性及局限性。方法 :2 5例患者进行 16层螺旋CT冠状动脉成像 (回顾性心电门控、0 .4 2s螺旋扫描 ) ,并与常规冠状动脉造影对照。结果 :在 2 5例患者的 186节段 (血管直径≥ 2mm)中 ,CT图像... 详细信息

目的 :评价 16层螺旋CT诊断冠状动脉疾病的准确性及局限性。方法 :2 5例患者进行 16层螺旋CT冠状动脉成像 (回顾性心电门控、0 .4 2s螺旋扫描 ) ,并与常规冠状动脉造影对照。结果 :在 2 5例患者的 186节段 (血管直径≥ 2mm)中 ,CT图像能满足诊断要求的有 16 1节段 (86 .5 % )。对于CT图像能满足诊断要求的冠状动脉节段 ,MSCT显示中度和中度以上狭窄的敏感度和特异度分别 83.8% (2 6 /31)和 95 .3% (12 4 /130 )。若将不能满足诊断要求的 2 5节段包括内 ,则MSCT显示中度和中度以上狭窄的敏感度为 76 .4 % (2 6 /34)。结论 :16层螺旋CT冠状动脉成像可用于无创性诊断冠状动脉中高度狭窄 ,局限性伪影的影响不可避免。

关键词：冠状动脉疾病心血管造影术体层摄影术,x线计算机

On gl（2｜2）（2）k Current Superalgebra and Twisted Conformal Field Theory

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Communications in Theoretical Physics 2007年第1期47卷 69-77页

作者： ding xiang-mao WANG Gui-Dong WANG Shi-Kun Institute of Applied Mathematics Academy of Mathematics and Systems Science~ the Chinese Academy of Sciences P.O. Box 2734 Beijing 100080 China Graduate School of the Chinese Academy of Scisences Beijing 100049 China KLMM AMSS CAS Beijing 100080 China

Motivated by the recently discovered hidden symmetry of the type IIB Green-Schwarz superstring on certain background, the non-semisimple Kac-Moody twisted superalgebra gl（2｜2）（2）k is investigated by means of the vector coherent state method and boson-fermion realization. The free field realization of the twisted current superalgebra at general level k is constructed. The corresponding Conformai Field Theory （CFT） has zero central charge. According to the classification theory, this CFT is a nonunitary field theory. After projecting out a U（1） factor and an outer automorphism operator, we get the free field representation of psl（2｜2）（2）k, which is the a/gebra of gl（2｜2）（2）k modulo the Z4-outer automorphism, the CFT has central charge -2.

关键词： superalgebra differential operator realization free field realization conformal field theory

Deciphering fungal metabolon coupling tandem inverse-electrondemand Diels-Alder reaction and semipinacol rearrangement for the biosynthesis of spiro polycyclic alkaloids

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Science China Chemistry 2025年第01期 288-296页

作者： Shuai Liu Wen-Qiang Xu Ying-Tong Di Man-Cheng Tang ding-Kang Chen Ming-Ming Cao Yao-Wen Chang Hong-Yu Tang Chun-mao Yuan Jun-Bo Yang Zhi-Li Zuo Han Guo Zi-Fei Xu Ying Zeng Yun-Dong Wu Xiao-Jiang Hao Key Laboratory of Phytochemistry and Natural Medicines (Chinese Academy of Sciences) Kunming Institute of Botany Chinese Academy of Sciences University of Chinese Academy of Sciences Lab of Computational Chemistry and Drug Design State Key Laboratory of Chemical Oncogenomics Peking University Shenzhen Graduate School Shenzhen Bay Laboratory State Key Laboratory of Microbial Metabolism School of Life Sciences & Biotechnology Shanghai Jiao Tong University State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical University Molecular Biology Experimental Center Germplasm Bank of Wild Species in Southwest China Kunming Institute of Botany Chinese Academy of Sciences Yunnan Key Laboratory for Wild Plant Resources Kunming Institute of Botany Chinese Academy of Sciences Research Unit of Chemical Biology of Natural Anti-Virus Products Chinese Academy of Medical Sciences

In the intricate process of natural product biosynthesis, a metabolon can enhance metabolic flux by associating sequential enzymes. A fungal metabolon, comprising of flavin-dependent monooxygenase Spe F and P450 monooxygenase Spe G, is identified in the biosynthesis of spiro polycyclic alkaloids(+)-notoamide B and its diastereomer(+)-versicolamide B. Using notoamide E as a substance, Spe F/Spe G metabolon can control the stereoselectivity of its 2,3-epoxidation, followed by hydrogen atom ion at C-17 to generate reactive epoxide tau-m A with dienyl iminium unit. Subsequently,(+)-notoamide B and(+)-versicolamide B are produced via tandem nonenzymatic inverse-electron-demand Diels-Alder reaction and semipinacol rearrangement. This provides the first example of metabolon in the biosynthesis of spiro-prenylated indole alkaloids.

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Bending vibration control of pipes conveying fluids by nonlinear torsional absorbers at the boundary

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Science China(Technological Sciences) 2021年第8期64卷 1690-1704页

作者： mao XiaoYe ding Hu CHEN LiQun Shanghai Institute of Applied Mathematics and Mechanics Shanghai UniversityShanghai200072China Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai UniversityShanghai200072China School of Mechanics and Engineering Science Shanghai UniversityShanghai200444China

A nonlinear torsional absorber,which can overcome the influence of the fluid velocity on the natural frequency,is employed at the boundary to restrain the bending vibration of a pipe for the first *** using the rotating angle at the end of the pipe,the bending vibration energy is pumped to the boundary *** nonlinearly coupled pipe-absorber governing equations are obtained by the generalized Hamilton’s ***-state responses subjected to a basement excitation are discussed by the *** to this method,the boundaries of the pipe are treated as the generalized governing *** this way,those nonlinearities and time-dependent terms in the boundary are involved in the response completely.A direct simulation method,called the differential quadrature element method(DQEM),is used to verify these analytical *** investigation indicates that the nonlinear boundary absorber owns two outstanding *** first one is that the natural characters remain the same and the absorber can capture the resonance of the pipe *** second one is that the absorber works at all natural ***,by using the nonlinear damping,the absorber will not worsen the weak vibration in the non-resonance *** parameters of the absorber are investigated to optimize the efficiency in *** result finds that good efficiency can be achieved with a tiny ***,the efficiency becomes better as the damping *** the help of these investigations,the work provides a new strategy to protect pipes conveying fluids from being destroyed by the vibration.

关键词： pipes conveying fluid boundary control nonlinear torsional absorber boundary nonlinear energy sink nonlinear damping

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Fuzzy Set-Membership Filtering for Discrete-Time Nonlinear Systems

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IEEE/CAA Journal of Automatica Sinica 2022年第6期9卷 1026-1036页

作者： Jingyang mao xiangyu Meng Derui ding Department of Control Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China Division of Electrical and Computer Engineering Louisiana State UniversityBaton RougeLA70803 USA IEEE School of Science Computing and Engineering TechnologiesSwinburne University of TechnologyMelbourneVIC 3122Australia

In this article,the problem of state estimation is addressed for discrete-time nonlinear systems subject to additive unknown-but-bounded noises by using fuzzy set-membership ***,an improved T-S fuzzy model is introduced to achieve highly accurate approximation via an affine model under each fuzzy ***,compared to traditional prediction-based ones,two types of fuzzy set-membership filters are proposed to effectively improve filtering performance,where the structure of both filters consists of two parts:prediction and *** the locally Lipschitz continuous condition of membership functions,unknown membership values in the estimation error system can be treated as multiplicative noises with respect to the estimation ***-time recursive algorithms are given to find the minimal ellipsoid containing the true ***,the proposed optimization approaches are validated via numerical simulations of a one-dimensional and a three-dimensional discrete-time nonlinear systems.

关键词： Affine model membership functions set-membership filtering stability Takagi-Sugeno fuzzy modeling