检索结果-南通市图书馆

清代《红楼梦》刊本的出海之旅——以广州为中心

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

河北学刊 2025年第2期45卷 82-94页

作者：曹立波侯钧才中央民族大学文学院中国红楼梦学会中央民族大学

清中叶广州出版业蓬勃发展,《红楼梦》的刊行具有标志性意义。现知有15种《红楼梦》刊本的梓行地位于广东,其中东观阁——文畬堂系列评本、东观阁——三让堂系统评本的影响较大。受“一口通商”政令影响,清代《红楼梦》刊本大多由广州... 详细信息

清中叶广州出版业蓬勃发展,《红楼梦》的刊行具有标志性意义。现知有15种《红楼梦》刊本的梓行地位于广东,其中东观阁——文畬堂系列评本、东观阁——三让堂系统评本的影响较大。受“一口通商”政令影响,清代《红楼梦》刊本大多由广州港出海。《红楼梦》首次英译是马礼逊在广州进行的,第一部评介《红楼梦》的英语文章也发表于广州。在《红楼梦》海外传播过程中,广府发挥的重要功能,应是当时政策条件、经济水平、地理环境和出版业发展水平等因素共同作用的结果。在分析中国古籍海外流布现象时,以往学术界多站在接受学角度加以考察;若能尝试从输出角度加以研究,聚焦《红楼梦》自广州出海、辐射到世界各地的现象,则可为中华优秀传统文化走出去发掘历史经验、提供当代价值。

关键词：《红楼梦》广州出海清代海上红楼之路

Bonding Character and Formation Energy of Point Defects of He and Vacancy on (001) Surface of bcc Iron by First Principle Calculations

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2013年第1期26卷 25-32页

作者： jun cai Daogang LU School of Nuclear Science and Engineering North China Electric Power University

The structure and energy of He impurities and vacancy on （001） surface of bcc iron are investigated by an ab initio method. Three cases for stabilities of a He atom at the surface are found： some of He atoms at surface atomic layers （SAL） relax into vacuum gap; some of surface He atoms at octahedral interstitial site relax into more stable tetrahedral interstitial site; some of surface He atoms still stay at tetrahedral interstitial site. The un-stability of the He atom at the surface system can be explained by deformation mechanism of charge densities and electronic densities of states. It is found that formation energy of the point defects from the topmost SAL to bulk-like atomic layer increase gradually, for example, the formation energies of a monovacancy at the first five topmost SALs are equal to 0.33, 1.56, 2.04, 2.02 and 2.11 eV, respectively. The magnetic moments of Fe atoms in the surface atomic layers are also calculated.

关键词： ab initio calculations Single point defects bcc Fe (001) surface Electronicstructure

定向电场下W_(6)C_(6)团簇的超卤素调制及非线性光学特性

在线全文

学校读者我要写书评

暂无评论

原子与分子物理学报 2025年第3期42卷 72-76页

作者：蔡璧钧段宇静魏强重庆理工大学理学院重庆400050

本文采用密度泛函(DFT)方法研究了定向外电场(OEEF)对W_(6)C_(6)团簇几何结构、电子性质以及非线性光学响应(NLO)的影响.计算结果表明W_(6)C_(6)的结构在一定OEEF强度下可以保持稳定.OEEF可以增大W_(6)C_(6)团簇的电子亲和能(EA值),且... 详细信息

本文采用密度泛函(DFT)方法研究了定向外电场(OEEF)对W_(6)C_(6)团簇几何结构、电子性质以及非线性光学响应(NLO)的影响.计算结果表明W_(6)C_(6)的结构在一定OEEF强度下可以保持稳定.OEEF可以增大W_(6)C_(6)团簇的电子亲和能(EA值),且在特定强度下,OEEF可以将W_(6)C_(6)团簇转变为超卤素.通过对EA值的非线性拟合可以实现对W_(6)C_(6)团簇的连续调制.进一步对不同外电场下W_(6)C_(6)团簇的最高占据分子轨道(HOMO)和最低未占据分子轨道(LUMO)能级进行分析,发现OEEF降低了W_(6)C_(6)团簇LUMO能级是其EA值增大的主因.此外,OEEF可以显著增大W_(6)C_(6)团簇的平均极化率和第一超极化率,尤其是第一超极化率,改变其非线性光学性质.

关键词：定向外电场超原子密度泛函理论 NLO W_(6)C_(6)团簇

维普期刊数据库博看期刊

Cure of a New Type Composite on Noise Control and Effect of Filler Modification

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2003年第z1期19卷 135-136页

作者： jun cai Fei XU Weimin cai School of Municipal and Environment Englineering Harbin Institute of Technology Harbin150001china School of Environment Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China School of Environment Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China

A new type composite of high efficiency sound attenuation was cured. The superfine tungsten powder, plasticizerand stabilizer are added into the PVC resin and blended in the mixing chamber of a HAAKE rheometer. The effect ofthe filler modification is considered in the composite cure. The properties of modified composite and unmodified oneare studied by SEM morphology viewing, acoustic and mechanical measurement. The test results indicate that thereason of the better soundproof and mechanical properties is the particle uniform dispersion and stronger adhesion.

关键词： Composite, Filler modification, Soundproof property, Mechanical property

Optimization of resource allocation in FDD massive MIMO systems

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Digital Communications and Networks 2024年第1期10卷 117-125页

作者： jun cai Chuan Yin Youwei Ding School of Artificial Intelligence and Information Technology Nanjing University of Chinese MedicineNanjing 210046China School of Electronic and Information Hangzhou Dianzi UniversityHangzhou 310018ZhejiangChina

The performance of massive MIMO systems relies heavily on the availability of Channel State Information at the Transmitter(CSIT).A large amount of work has been devoted to reducing the CSIT acquisition overhead at the pilot training and/or CsI feedback *** fact,the downlink communication generally includes three stages,i.e.,pilot training,CsI feedback,and data *** three stages are mutually related and jointly determine the overall system ***,there exist few studies on the reduction of csIT acquisition overhead from the global point of *** this paper,we integrate the Minimum Mean Square Error(MMSE)channel estimation,Random Vector Quantization(RVQ)based limited feedback and Maximal Ratio Combining(MRC)precoding into a unified framework for investigating the resource allocation *** particular,we first approximate the covariance matrix of the quantization error with a simple expression and derive an analytical expression of the received Signal-to-Noise Ratio(SNR)based on the deterministic equivalence *** the three performance metrics(the spectral efficiency,energy efficiency,and total energy consumption)oriented problems are formulated *** practical system requirements,these three metrics can be collaboratively ***,we propose an optimization solver to derive the optimal partition of channel coherence *** results verify the benefits of the proposed resource allocation schemes under three different scenarios and illustrate the tradeoff of resource allocation between three stages.

关键词： Massive MIMO FDD CSIT Resource allocation

Integrability and Exact Solutions of the(2+1)-dimensional KdV Equation with Bell Polynomials Approach

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2022年第4期38卷 861-881页

作者： jun-cai PU Yong CHEN School of Mathematical Sciences Shanghai Key Laboratory of Pure Mathematics and Mathematical PracticeEast China Normal UniversityShanghai 200062China College of Mathematics and Systems Science Shandong University of Science and TechnologyQingdao 266590China

In this paper,the bilinear formalism,bilinear B?cklund transformations and Lax pair of the(2+1)-dimensional KdV equation are constructed by the Bell polynomials *** N-soliton solution is derived directly from the bilinear ***,based on the two-soliton solution,the lump solution is given out analytically by taking special parameters and using Taylor expansion *** the help of the multidimensional Riemann theta function,multiperiodic(quasiperiodic)wave solutions for the(2+1)-dimensional KdV equation are obtained by employing the Hirota bilinear ***,the asymptotic properties of the one-and two-periodic wave solution,which reveal the relations with the single and two-soliton solution,are presented in detail.

关键词： the bilinear formalism bilinear B?cklund transformations Lax pair lump solution periodic wave solution the asymptotic properties

含参数的 p -Laplacian分数阶微分方程多重正解的存在性

在线全文

学校读者我要写书评

暂无评论

兰州理工大学学报 2025年第1期51卷 166-172页

作者：吴克晴徐紫钰蔡序军江西理工大学理学院江西赣州341000

考虑了一类具有p-Laplacian算子同时非线性项含积分项的Riemann-Liouville型非线性分数阶微分方程,分析其在包含参数及分数阶积分条件的边界条件下的多重正解的存在性.利用格林函数将问题转化为积分方程,并在Banach空间中运用Leggett-Wi... 详细信息

考虑了一类具有p-Laplacian算子同时非线性项含积分项的Riemann-Liouville型非线性分数阶微分方程,分析其在包含参数及分数阶积分条件的边界条件下的多重正解的存在性.利用格林函数将问题转化为积分方程,并在Banach空间中运用Leggett-Williams不动点定理和广义Avery-Henderson不动点定理获得主要结果,通过一个实例说明所得结果的适用性.

关键词： p-Laplacian算子参数多重正解不动点定理

Flow characteristics in a rotor-stator cavity with cooling air inlet at low radius

在线全文

学校读者我要写书评

暂无评论

航空动力学报 2015年第4期30卷 775-783页

作者： cai Xu LUO Xiang ZHAO Xi XUGuo-qiang cai jun National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics School of Energy and Power Engineering Beijing University of Aeronautics and Astronautics Beijing 100191 China Dalian Airforce Department of Information Network Communicaiton Non-Commissioned Office Academy Dalian Liaoning 116600 China Guizhou Aero-Engine Research Institute Aviation Industry Corporation of China Guiyang 550081 China

Experiments were conducted on a typical rotor-stator system where air entered through an annular slot at low radius and flowed out of the cavity axially through a rim seal between the rotor and the *** the seal in this rotor-stator system,the stationary shroud overlapped the rotating *** distributions at the stator surface and flow resistance coefficients of the rotor-stator cavity with a maximum gap of 67mm were measured under different dimensionless mass flow rates from 1.32×104 to 4.87×104 with a large range of rotational Reynolds numbers from 0.418×106 to 2.484×*** results show that pressure on the stator surface decreases with the increase of rotational Reynolds number when the dimensionless mass flow rate is below 1.3×104;when the dimensionless mass flow rate is above 3.034×104,the trend *** is the so-called"pressure inversion effect".However,dimensionless pressure does not show the same changes when rotational dynamic pressure is chosen as the *** resistance coefficient of the rotor-stator cavity is determined by the dimensionless mass flow rate and rotational Reynolds number;for practical application,the resistance coefficient can also be estimated by the turbulent flow parameter in the range of turbulent parameter from 0.1to 1.6.

关键词： cooling system rotor-stator system flow characteristics pressure distribution resistance coefficient

Soliton, breather, and rogue wave solutions for solving the nonlinear Schrodinger equation using a deep learning method with physical constraints

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2021年第6期30卷 77-87页

作者： jun-cai Pu jun Li Yong Chen School of Mathematical Sciences Shanghai Key Laboratory of Pure Mathematics and Mathematical Practiceand Shanghai Key Laboratory of Trustworthy ComputingEast China Normal UniversityShanghai 200241China Shanghai Key Laboratory of Trustworthy Computing East China Normal UniversityShanghai 200062China College of Mathematics and Systems Science Shandong University of Science and TechnologyQingdao 266590China Department of Physics Zhejiang Normal UniversityJinhua 321004China

The nonlinear Schrodinger equation is a classical integrable equation which contains plenty of significant properties and occurs in many physical ***,due to the difficulty of solving this equation,in particular in high dimensions,lots of methods are proposed to effectively obtain different kinds of solutions,such as neural networks among ***,a method where some underlying physical laws are embeded into a conventional neural network is proposed to uncover the equation’s dynamical behaviors from spatiotemporal data *** with traditional neural networks,this method can obtain remarkably accurate solution with extraordinarily less ***,this method also provides a better physical explanation and *** this paper,based on the above method,we present an improved deep learning method to recover the soliton solutions,breather solution,and rogue wave solutions of the nonlinear Schrodinger *** particular,the dynamical behaviors and error analysis about the one-order and two-order rogue waves of nonlinear integrable equations are revealed by the deep neural network with physical constraints for the first ***,the effects of different numbers of initial points sampled,collocation points sampled,network layers,neurons per hidden layer on the one-order rogue wave dynamics of this equation have been considered with the help of the control variable way under the same initial and boundary *** experiments show that the dynamical behaviors of soliton solutions,breather solution,and rogue wave solutions of the integrable nonlinear Schrodinger equation can be well reconstructed by utilizing this physically-constrained deep learning method.

关键词： deep learning method neural network soliton solutions breather solution rogue wave solutions