检索结果-南通市图书馆

Lie Super-bialgebra Structures on the Super-BMS3 Algebra

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Algebra Colloquium 2019年第3期26卷 437-458页

作者： Xiao Cheng Jiancai Sun hengyun yang Division of Mathematics and Physics Shanghai Environmental Science School Shanghai 200135China Department of Mathematics Shanghai UniversityShanghai 200444China Department of Mathematics Shanghai Maritime UniversityShanghai 201306China

In t his paper,Lie super-bialgebra st rue tures on the super-BMS3 algebra are *** is proved that all such Lie super-bialgebras are triangular coboundary Lie *** method we use is mainly based on the computation of deri... 详细信息

关键词： Lie super-bialgebra yang-Baxter equation super-BMS3 algebra

Derivation algebra and automorphism group of generalized topological N = 2 superconformal algebra

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Mathematics in China 2013年第4期8卷 973-986页

作者： hengyun yang Yafeng YU Tingfu YAO Department of Mathematics Shanghai Maritime University Shanghai 201306 China College of Mathematics and Computer Science Guizhou Normal University Guiyang 550001 China

We determine the derivation algebra and the automorphism group of the generalized topological N = 2 superconformal algebra.

关键词： generalized topological N = 2 superconformal algebra derivation algebra automorphism group

Lie bialgebra structures on generalized loop Schr?dinger-Virasoro algebras

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Mathematics in China 2019年第2期14卷 239-260页

作者： Haibo CHEN Xiansheng DAI hengyun yang School of Statistics and Mathematics Shanghai Lixin University of Accounting and FinanceShanghai 201209China School of Mathematics Sciences Guizhou Normal UniversityGuiyang 550001China Department of Mathematics Shanghai Maritime UniversityShanghai 201306China

We give a classification of Lie bialgebra structures on generalized loop Schr?dinger-Virasoro algebras st). Then we find out that not all Lie bialgebra structures on generalized loop Schr?dinger-Virasoro algebras st) ... 详细信息

关键词： Lie bialgebra yang-Baxter equation generalized loop Schrodinger-Virasoro algebra

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Lie color代数的全形(英文)

上海海事大学学报 2007年第2期28卷 92-94页

作者：杨恒云上海海事大学基础教学部上海200135

给出Lie color代数全形的一些性质,证明Lie color代数L的全形有分解H(L)=L ZH(L)(L)的充分必要条件是它是完备Lie color代数.

关键词： Lie color代数全形 color导子代数完备Lie color代数

在线全文

学校读者我要写书评

暂无评论

两类6维幂零李代数的上同调群

上海海事大学学报 2012年第1期33卷 91-94页

作者：杨恒云叶鑫上海海事大学文理学院上海201306

由于低维幂零李代数的分类问题尚未解决,在de GRAAF研究的基础上,对复数域上两类6维幂零李代数的低阶上同调群进行研究,确定其导子代数、自同构群及二上循环,其结果对进一步研究一般幂零李代数的结构和表示具有参考价值。

关键词：李代数导子代数自同构群二上循环

Experimental determination of heat generation rates of lithium-ion batteries by thermal protection method

在线全文

学校读者我要写书评

暂无评论

Science China Technological Sciences 2024年

作者： SHI JingHe ZHANG hengyun YU Hong WANG XiaoLin School of Mechanical and Automotive Engineering Shanghai University of Engineering Science School of Engineering University of Tasmania

Experimental determination of heat generation rates is crucial in the thermal safety design of automotive batteries. A thermal protection method(TPM) is proposed to determine the heat generation rates of 18650 cylindrical lithium-ion batteries under different discharge rates. The physical model based on the thermal protection method is established, and its feasibility is demonstrated through theoretical analysis. In the experimental setup, by introducing lateral thermal protection batteries(TPB) to minimize the heat loss of the center test battery(CTB), heat generation rates of the battery can be obtained based on the temperature change of the CTB. The average heat generation rates of the battery at 1, 2, and 3 C discharge rates are found to be0.255, 0.844, and 1.811 W, respectively, which can be quadratically correlated with the discharge rate. In addition, a benchmark test of the present measurement against the commonly used accelerating rate calorimeter(ARC) was conducted. Relatively small deviations of 3.77%, 4.20%, and 1.09% were identified in the heat generation rates for the discharge rates at 1, 2, and 3 C. In comparison with the ARC equipment, the present TPM can be more representative of the transient battery heat generation characteristics with a much shorter time for thermal equalization. Finally, to further verify the accuracy of the present method,standard samples of the same size as the actual battery were made, which were capable of controlling heat generation through a direct current power supply. A comparison of the heat inputs of the standard sample with the heat generation rates measured by the thermal protection method shows a relative deviation of 1.01% maximum. With high measurement accuracy and an easy-tobuild experimental setup, the proposed method has promising prospects in automotive applications.

关键词：

Crystal engineering regulation achieving inverse temperature symmetry breaking ferroelasticity in a cationic displacement type hybrid perovskite system

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第5期35卷 477-481页

作者： Na Wang Wang Luo Huaiyi Shen Huakai Li Zejiang Xu Zhiyuan Yue Chao Shi hengyun Ye Leping Miao Chaotic Matter Science Research Center Department of MaterialsMetallurgy and ChemistryJiangxi University of Science and TechnologyGanzhou 341000China

Ferroelastic hybrid perovskite materials have been revealed the significance in the applications of switches,sensors,actuators,***,it remains a challenge to design high-temperature ferroelastic to meet the requirements for the practical ***,we reported an one-dimensional organicinorganic hybrid perovskites(OIHP)(3-methylpyrazolium)CdCl_(3)(3-MBCC),which possesses a mmmF2/m ferroelastic phase transition at 263 ***,utilizing crystal engineering,we replace-CH_(3) with-NH_(2) and-H,which increases the intermolecular force between organic cations and inorganic *** phase transition temperature of(3-aminopyrazolium)CdCl_(3)(3-ABCC),and(pyrazolium)CdCl_(3)(BCC)increased by 73 K and 10 K,***,BCC undergoes an unconventional inverse temperature symmetry breaking(ISTB)ferroelastic phase transition around 273 ***,it transforms from a high symmetry low-temperature paraelastic phase(point group 2/m)to a low symmetry high-temperature ferroelastic phase(point group ī)originating from the rare mechanism of displacement of organic cations phase *** means that crystal BCC retains in ferroelastic phase above 273 K until melting point(446 K).Furthermore,characteristic ferroelastic domain patterns on crystal BCC are confirmed with polarized optical *** study enriches the molecular mechanism of ferroelastics in the family of organic-inorganic hybrids and opens up a new avenue for exploring high-temperature ferroic materials.

关键词： Organic-inorganic hybrid perovskite Crystal engineering Inverse temperature symmetry breaking Displacement type phase transition Ferroelasticity

Magnetic, dielectric and luminescence synergetic switchable effects in molecular material [Et_(3)NCH_(2)Cl]_(2)[MnBr_(4)]

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第4期35卷 502-505页

作者： Yan Cheng Hua-Peng Ruan Yan Peng Longhe Li Zhenqiang Xie Lang Liu Shiyong Zhang hengyun Ye Zhao-Bo Hu Chaotic Matter Science Research Center Faculty of Materials Metallurgy and ChemistryJiangxi University of Science and TechnologyGanzhou 341000China College of Materials and Chemical Engineering Pingxiang UniversityPingxiang 337055China Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry Jiangxi University of Science and TechnologyGanzhou 341000China Key Laboratory of Jiangxi University for Functional Materials Chemistry School of Chemistry and Chemical EngineeringGannan Normal UniversityGanzhou 341000China

The application of multifunctional materials in various fields such as electronics and signal processors has attracted massive attention. Herein, a new organic-inorganic hybrid material [Et_(3)NCH_(2)Cl]_(2)[MnBr_(4)](1) is reported, which contains two organic amines cations and one [MnBr_(4)] tetrahedral ion. Compound 1 has a dielectric anomaly signal at 338 K, which proves its thermodynamic phase transition. The single crystal measurements at 200 K and 380 K show that the phase transition of compound 1 is caused by the thermal vibration of organic amine cations in the lattice. Moreover, compound 1 shows yellow-green luminescence under UV light irradiation. The magnetism measurements indicate that compound 1 shows switchable magnetic properties. This organic–inorganic material is a multifunctional material with dielectric, optical, and magnetic synergetic switchable effects, which expands a new direction for designing multifunctional materials.

关键词： Synergetic switchable effects Molecular materials Magnetism Dielectric Luminescence

Vibration properties of Paulownia wood for Ruan sound quality using machine learning methods

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2024年第5期35卷 216-222页

作者： yang yang College of Art and Design Harbin UniversityHarbin 150076People’s Republic of China College of Mechanical and Electrical Engineering Northeast Forestry UniversityHarbin 150040People’s Republic of China

As an important material for manufacturing resonant components of musical instruments,Paulownia has an important influence on the sound quality of *** this paper,a model for evaluating the sound quality of Ruan based on the vibration characteristics of wood is developed using machine learning ***,the selection of materials for Ruan manufacturing relies primarily on manually weighing,observing,striking,and listening by the instrument *** in scientific theory have hindered the quality of the finished *** this study,nine Ruans were manufactured,and a prediction model of Ruan sound quality was proposed based on the raw material information of *** of a total of 180 data sets,145 and 45 sets were chosen for training and validation,*** this paper,typical correlation analysis was used to determine the correlation between two single indicators in two adjacent pairwise combinations of the measured objects in each stage of the production process in *** vibra-tion characteristics of the wood were tested,and a model for predicting the evaluation of Ruan’s acoustic qualities was developed by measuring the vibration characteristics of the resonating plate *** acoustic quality of the Ruan sound board wood was evaluated and predicted using machine learning model generalized regression neural *** results show that the prediction of Ruan sound quality can be achieved using Matlab simulation based on the vibration characteristics of the soundboard *** the model-predicted values were compared with the tradi-tional predicted results,it was found that the generalized regression neural network had good performance,achieving an accuracy of 93.8%which was highly consistent with the experimental *** was concluded that the model can accurately predict the acoustic quality of the Ruan based on the vibration performance of the soundboards.

关键词： Sound quality Wood vibration performance Paulownia wood Machine learning methods