检索结果-南通市图书馆

Communications in Theoretical Physics 2020年第9期72卷 1-7页

作者： hongcai Ma Qiaoxin Cheng Aiping Deng Department of Applied Mathematics Donghua UniversityShanghai201620China Institute for Nonlinear Sciences Donghua UniversityShanghai201620China

Soliton molecules have become one of the hot topics in recent years. In this article, we investigate soliton molecules and some novel hybrid solutions for the(2+1)-dimensional generalized Konopelchenko–Dubrovsky–Kaup–Kupershmidt(gKDKK) equation by using the velocity resonance, module resonance, and long wave limits methods. By selecting some specific parameters, we can obtain soliton molecules and asymmetric soliton molecules of the gKDKK equation. And the interactions among N-soliton molecules are elastic. Furthermore, some novel hybrid solutions of the gKDKK equation can be obtained, which are composed of lumps,breathers, soliton molecules and asymmetric soliton molecules. Finally, the images of soliton molecules and some novel hybrid solutions are given, and their dynamic behavior is analyzed.

关键词： the(2+1)-dimensional generalized Konopelchenko–Dubrovsky–Kaup–Kupershmidt equation soliton molecules hybrid solutions velocity resonance long-wave limit

Interaction solutions for the(2+1)-dimensional extended Boiti-Leon-Manna-Pempinelli equation in incompressible fluid

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2023年第8期75卷 1-13页

作者： hongcai Ma Xue Mao Aiping Deng Department of Applied Mathematics Donghua UniversityShanghai 201620People's Republic of China

This paper aims to search for the solutions of the(2+1)-dimensional extended Boiti–Leon–Manna–Pempinelli *** solutions,breather solutions,mixed solutions with solitons,and lump-breather solutions can be obtained from the N-soliton solution formula by using the long-wave limit approach and the conjugate complex *** use both specific circumstances and general higher-order forms of the hybrid solutions as *** the help of maple software,we create density and 3D graphs to summarize the dynamic properties of these ***,it is possible to observe how the solutions'trajectory,velocity,and shape vary over time.

关键词： (2+1)-dimensional extended Boiti-Leon-Manna-Pempinelli equation long-wave limit method conjugate complex method interaction solutions dynamic characteristics

Microstructure tailoring in nanostructured thermoelectric materials

在线全文

学校读者我要写书评

暂无评论

Journal of Advanced Dielectrics 2016年第1期6卷 18-33页

作者： Qinghui Jiang Junyou yang Yong Liu hongcai He State Key Laboratory of Materials Processing and Die&Mould Technology and School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430074P.R.China Beijing Institute of Aeronautical Materials AVICBeijing 100095P.R.China State Key Laboratory of Electronic Thin Films and Integrated Devices and School of Microelectronics and Solid-State Electronics University of Electronic Science and Technology of ChinaChengdu 610054P.R.China

Progresses in thermoelectric(TE)materials will contribute to solving the world's demands for energy and global climate *** also calls for higher ZT to achieve ideal commercial conversion *** an effective way,nanostructuring can reduce the thermal conductivity by the selective scattering of phonons or enhance Seebeck coefficient via modification of the density of the states,resulting in good ZT ***,TE properties of nanostructured materials should depend on the size and morphology of the microstructure *** review emphasizes the developments in the TE bulk materials at the nanoscale in the past several years and summarizes the understanding in this active field.

关键词： Review thermoelectric nanostructure spark plasma sintering microstructure tailoring

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

加快建设优势学科的多维思考

高校教育管理 2025年第1期19卷 1-22页

作者：王战军王洪才陈亮王智超吴南中北京理工大学教育学院厦门大学高等教育发展研究中心陕西师范大学教育学东北师范大学教育学部西南大学教师教育学院

学科是人才培养、科技创新和服务经济社会发展的重要载体。进入新发展阶段,面向世界科技前沿、面向经济主战场、面向国家重大需求、面向人民生命健康,以改革创新为驱动,加快建设一批中国特色、世界一流的优势学科,是扎实迈进高等教育强... 详细信息

学科是人才培养、科技创新和服务经济社会发展的重要载体。进入新发展阶段,面向世界科技前沿、面向经济主战场、面向国家重大需求、面向人民生命健康,以改革创新为驱动,加快建设一批中国特色、世界一流的优势学科,是扎实迈进高等教育强国的重要举措。优势学科概念内涵、文化背景、精神追求、建设路径等方面均体现着高质量发展阶段加快建设高等教育强国的战略布局。为此,在厘清优势学科的内涵、特征及生成机制的前提下,我们应从价值逻辑、经济逻辑、实践逻辑、政策逻辑等维度进一步探明优势学科建设的逻辑向度,在此基础上,以完善顶层设计为引领力,以善用数字技术为牵引力,可持续推进优势学科高质量建设。

关键词：优势学科改革创新生成机制逻辑向度数字技术高等教育强国

A stable biocompatible porous coordination cage promotes in vivo liver tumor inhibition

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2021年第10期14卷 3407-3415页

作者： Yu Liang Yu Fang Yong Cui hongcai Zhou State Key Laboratory for Chemo/Bio-Sensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240China Department of Chemistry Texas A&M UniversityCollege StationTX 77843USA

Many emerging strategies in chemo-,gene-,and immunotherapy require the accumulation of reagents in the cell ***,their delivery into the nucleus is often *** delivery could be enhanced with a rationally designed cargo-delivery scaffold,but this approach has rarely been successfully ***,a stable,biocompatible molecular capsule that encapsulates and delivers camptothecin,a DNA topoisomerase I inhibitor,into the nucleus of living cells was *** delivery is facilitated by the ultra-small diameter,zero net charge,and hydrophobicity of the *** encapsulated drug complex displays superior toxicity towards multiple cancer cells over the free drug,the Food and Drug Administration(FDA)approved drugs,as well as conventionally reported drug ***,it inhibits liver cancer tumor growth in a xenograft mouse *** of the properties of such molecular capsules may make it possible to design therapeutic strategies that target specific cell organelles.

关键词： metal-organic polyhedron biocompatible cage compound cavity drug delivery

Synthesis of Poly (3-acetylpyrrolyl methine) with Azobenzene Side Groups and Study on Its Third-order Nonlinear Optical Property

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2005年第5期21卷 715-718页

作者： Zhigang ZHANG hongcai WU Lingjie MENG Wenhui YI Institute of Photoelectric Technology and Solar Energy School of Electronic and Information Engineering Xi'an JiaotongUniversity Xi'an 710049 China Department of PDP IRICO Group Electronics Company Limited Beijing 100085 China

A novel soluble π-conjugated polymer, poly [（3-acetylpyrrole-2, 5-diyl） p-（N, N-dimethylamino） azobenzylidene] （PAPDMAABE）, was synthesized by condensation of 3-acetylpyrrole with 4-aldehyde-4＇-dimethylaminoazobenzene （ADMAA）. The chemical structure of PAPDMAABE was characterized by Fourier transform infrared spectroscopy （FTIR）, ^1H-NMR, and UV-Vis-NIR spectra. Transmission electron microscope （TEM） analysis for PAPDMAABE indicates that part of PAPDMAABE is in crystal state, due to the short-range order of the polymer. Thermogravimetric analysis （TGA） curve shows that the polymer has good thermal stability and its decomposition temperature is 248℃. The optical band gap of PAPDMAABE obtained from the optical absorption spectrum is about 1.73 eV. The resonant third-order nonlinear optical property of PAPDMAABE at 532 nm was studied using degenerate four-wave mixing （DFWM） technique. The resonant third-order nonlinear optical susceptibility of the polymer is about 7.48×10^-8 esu.

关键词： Poly [(3-acetylpyrrole-2, 5-diyl) p-(N, N-dimethylamino) azobenzylidene] Small optical band gap Degenerate four-wave mixing Third-order nonlinear property

Analysis Method and Principle of Dual-mode Electro-mechanical Variable Transmission Program

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2012年第3期25卷 524-529页

作者： LI hongcai YAN Qingdong XIANG Changle WANG Weida National Key Lab of Vehicular Transmission Beijing Institute of TechnologyBeijing 100081China

Automotive industry,as an important pillar of the national economy,has been rapidly developing in recent *** proplems such as energy comsumption and environmental pollution are posed at the same ***-mechanical variable transmission system is considered one of avilable *** is brought forward a kind of design methods of dual-mode electro-mechanical variable transmission system rotational speed characteristics and dual-mode drive *** the motor operating behavior of running in four quadrants and the speed characteristics of the simple internal and external meshing single planetary gear train,four kinds of dual-mode electro-mechanical transmission system scheme are *** the velocity,torque and power characteristics of one of the programs are *** magnitude of the electric split-flow power is an important factor which influences the system performance,so in the parameters matching design,it needs to reduce the power needs under the first mode of the *** motor,output rotational speed range and the position of the mode switching point have relationships with the characteristics design of the planetary gear *** analysis method is to provide a reference for hybrid vehicles＇ *** the involved rotational speed and torque relationships are the natural contact of every part of transmission system,a theory basis of system program and performance analysis is provided.

关键词： electro-mechanical variable transmission dual-mode rotational speed characteristics

A perspective on the Li-ion battery

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2019年第12期62卷 1555-1556页

作者： John B.Goodenough hongcai Gao Texas Materials Institute and Materials Science Program The University of Texas at Austin Cockrell School of Engineering

In the 1960s,Rouxel in France and Robert Schroeder in Germany explored the chemistry of reversible intercalation of Li^+between MS2(M=transition metal)layers held together by weak Van der Waals bonding[1].In 1967,Kummer and Webber of the Ford Motor *** discovered fast 2D Na+diffusion at 300℃in incompletely occupied Na^+and O layers between spinel blocks of an aluminum oxide and had invented a sodium-sulfur battery operating above 300℃.

关键词： battery incomplete occupied

Blockchain-assisted virtual power plant framework for providing operating reserve with various distributed energy resources

在线全文

学校读者我要写书评

暂无评论

iEnergy

iEnergy 2023年第2期2卷 133-142页

作者： Hongyi Li Hongxun Hui hongcai Zhang State Key Laboratory of Internet of Things for Smart City University of MacaoTaipaMacao SARChina

The paradigm shift from a coal-based power system to a renewable-energy-based power system brings more challenges to the supply-demand balance of the *** energy resources(DERs),which can provide operating reserve to the grid,are regarded as a promising solution to compensate for the power fluctuation of the renewable energy ***-scale DERs can be aggregated as a virtual power plant(VPP),which is eligible to bid in the operating reserve *** the DERs usually belong to different entities,it is important to investigate the VPP operation framework that coordinates the DERs in a trusted *** this paper,we propose a blockchain-assisted operating reserve framework for VPPs that aggregates various *** the heterogeneity of various DERs,we propose a unified reserve capacity evaluation method to facilitate the aggregation of *** considering the mismatch between actual available reserve capacity and the estimated value,the performance of VPP in the operating reserve market is improved.A hardware-based experimental system is developed,and numerical results are presented to demonstrate the effectiveness of the proposed framework.

关键词： Blockchain technology distributed energy resources operating reserve reserve capacity evaluation virtual power plant

Education:a discipline or a field?

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 Education in China 2007年第1期2卷 63-73页

作者： WANG hongcai Institute of Education Xiamen UniversityXiamen 361005China

Historically,scholars have made unfailing efforts to position education as a standard science,but no solid success has been achieved regardless of the positivistic paradigm,quantitative approaches,or value-free neutral stances they *** China,scholars have set up a socalled“three independency”standard for the scientific study of education,but it has been finally proved invalid in *** interdisciplines permeate the field of education,education experiences a crisis of being *** serious rethinking,interdisciplines were widely believed to do more good than harm to ***,education is beginning to transform from a“colony”to an“empire”.In this transformation,education finds it necessary to break the traditional disciplinary boundaries and make it a field in which interdisciplinary communication is contributory to the enrichment of scholarship.

关键词： educational theory nature of education discipline field