检索结果-南通市图书馆

Frontiers of Education in China 2011年第4期6卷 471-494页

作者： zhu hong ma Yunpeng School of Education Northeast Normal UniversityChangchun 130024China

This paper explores new patterns of learning across cultures in higher education through a case study of a cohort of international graduate students at a university in Chinese *** University(NU)has hosted international students in its Chinese language and culture programs for ***,between 2008 and 2010,a new master’s degree program for international students was *** attracted 75 graduate students from different disciplinary backgrounds,from 21 developing countries in Africa,Asia,Latin America,and *** is the common language to both students and faculty,but a foreign language to *** program marks a significant shift for China’s higher education as it reaches out to the *** paper describes this cohort’s lived experiences in China,including academic,linguistic and socio-cultural *** analyzes the challenges such programs pose for the Chinese higher education system,explores how these challenges have become opportunities for growth and how barriers have been *** also discusses the implications of this case for the upgrading of higher education quality in China.

关键词： cross-cultural learning international students full English instruction

Smooth-optimal Adaptive Trajectory Tracking Using an Uncalibrated Fish-eye Camera

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

International Journal of Automation and computing 2020年第2期17卷 267-278页

作者： Zhao-Bing Kang Wei Zou Zheng zhu hong-Xuan ma Institute of Automation Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100190China

This paper presents a two-stage smooth-optimal trajectory tracking *** from existing methods,the optimal trajectory tracked point can be directly determined in an uncalibrated fish-eye *** the first stage,an adaptive trajectory tracking controller is employed to drive the tracking error and the estimated error to an arbitrarily small neighborhood of ***,an online smooth-optimal trajectory tracking planner is proposed,which determines the tracked point that can be used to realize smooth motion control of the mobile *** tracked point in the uncalibrated image can be determined by minimizing a utility function that consists of both the velocity change and the sum of cross-track *** performance of our planner is compared with other tracked point determining methods in experiments by tracking a circular trajectory and an irregular *** results show that our method has a good performance in both tracking accuracy and motion smoothness.

关键词： Smooth motion adaptive control trajectory tracking wheeled mobile robots visual servoing

An institution theory of formal meta-modelling in graphically extended BNF

在线全文

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2012年第1期6卷 40-56页

作者： hong zhu Department of Computing and Communication Technologies Oxford Brookes University Oxford UK

Meta-modelling plays an important role in model driven software development. In this paper, a graphic exten- sion of BNF （GEBNF） is proposed to define the abstract syn- tax of graphic modelling languages. From a GEBNF syntax definition, a formal predicate logic language can be induced so that meta-modelling can be performed formally by spec- ifying a predicate on the domain of syntactically valid mod- els. In this paper, we investigate the theoretical foundation of this meta-modelling approach. We formally define the se- mantics of GEBNF and its induced predicate logic languages, then apply Goguen and Burstall＇s institution theory to prove that they form a sound and valid formal specification lan- guage for meta-modelling.

关键词： meta-modelling modelling languages abstractsyntax semantics graphic extension of BNF (GEBNF) for-mal logic institution

Molecular simulation study of the microstructures and properties of pyridinium ionic liquid[HPy][BF_(4)]mixed with acetonitrile

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

原子与分子物理学报 2025年第4期42卷 27-32页

作者： XU Jian-Qiang ma Zhao-Peng CHENG Si LIU Zhi-Cong zhu Guang-Lai Department of Physics School of Physics and Electronic InformationAnhui Normal UniversityWuhu 241002China

The microstructures and thermodynamic properties of mixed systems comprising pyridinium ionic liquid[HPy][BF_(4)]and acetonitrile at different mole fractions were studied using molecular dynamics simulation in this *** following properties were determined:density,self-diffusion coefficient,excess molar volume,and radial distribution *** results show that with an increase in the mole fraction of[HPy][BF_(4)],the self-diffusion coefficient ***,the excess molar volume initially decreases,reaches a minimum,and then *** rules of radial distribution functions(RDFs)of characteristic atoms are *** increasing the mole fraction of[HPy][BF_(4)],the first peak of the RDFs of HA1-F decreases,while that of CT6-CT6 rises at first and then *** indicates that the solvent molecules affect the polar and non-polar regions of[HPy][BF_(4)]differently.

关键词： Pyridinium ionic liquids Thermodynamic properties Molecular dynamics simulation Radial distribution functions

New Approach to Synthesis of 6,7-Dimethoxyisatin

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2003年第5期14卷 468-470页

作者： hong Min ma Zhan zhu LIU Shi Zhi CHEN Institute of materia Medica Peking Union Medical College&Chinese Academy of Medical SciencesBeijing 100050

A new approach to synthesis of 6,7-dimethoxyisatin is reported. 2-nitro-3, 4- dimethoxy mandelonitrile in glacial acetic acid was treated with the solution of stannous chloride in hydrochloric acid to give 6, 7-dimet... 详细信息

关键词： Isatin stannous chloride mandelonitrile synthesis.

Regioselective Bromination of 3, 4-Dimethoxytoluene with N-Bromosuccinimide

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2003年第4期14卷 371-374页

作者： hong Min ma Zhan zhu LIU Shi Zhi CHEN Institute of materia Medica Peking Union Medical College&Chinese Academy of Medical SciencesBeijing 100050

The selective brominations of 3, 4-dimethoxytoluene with N-bromosuccinimide were reported. The nuclear and side-chain brominated products were obtained under different reaction conditions. The mechanism was also discu... 详细信息

关键词： Bromination 3, 4-dimethoxy toluene N-bromosucinimide regioselective bromination.

Experimental investigation on shape memory alloy metal rubber

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2013年第8期56卷 1949-1955页

作者： ma Yanhong zhu HaiXiong ZHANG DaYi LIU BaoLong hong Jie School of Energy and Power Engineering Beihang University

Shape memory alloy metal rubber(SmaMR)is a novel intelligent elastic damping material which can realize the integration of structure and *** investigations on the anisotropic mechanical characteristics which depended on shaping craft and working temperature were conducted by quasi-static *** experiments indicated that the heat setting temperature affect the elastic modulus non-monotonously but has little effect on the loss factor of SmaMR in both martensite and austenite *** the increase of the heat setting time,the elastic modulus of SmaMR monotonously decreases and the reduction of loss factor is *** the present shaping craft,SmaMR exhibits the anisotropy in moulding and non-moulding directions,which is affected by the heat setting process and working *** was proved that the mechanical properties have approximately linear relationship with temperature during the phase transition *** to its temperature-dependent mechanical properties,SmaMR that experiences the heat setting procedure is expected to be used in active vibration control systems with varying temperature-dependent stiffness and damping coefficients to provide superior vibration control performance.

关键词： heat setting procedure temperature-dependent characteristics anisotropy quasi-static tests

An HSR Data Model for Cyborg Insect Research Experiments

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2018年第4期27卷 680-686页

作者： hong Hui WANG Xiaoyu zhu Zhengfei ma Qian GUAN Nan ZHENG Nenggan Key Laboratory of Radio Frequency Circuit and System Hangzhou Dianzi University Qiushi Academy for Advanced Studies Zhejiang University College of Computer Science and Technology Zhejiang University Department of Computing Hong Kong Polytechnic University

Research on cyborg intelligent insects requires the experiment platform to collect data from the distributed sensing models and process the multi-modal signals in real-time. To overcome these issues, we present a novel data model, naming as the Hybrid-synchronizedrealtime(HSR) data model, which can synchronize the hybrid raw data channels by a meta data integration method and process them with a fixed priority scheduling algorithm. Real animal experiments show that the insect-machine experiment platform based on the HSR data model can fully satisfy the requirements of cyborg intelligent insect research, especially in dealing with the technical challenges of data synchronization, real-time processing and hybrid data integration. It provides an efficient approach to implement the experiment platform and thus aid the frontier research on cyborg insects.

关键词： Cyborg intelligent insects Data model Hybrid-synchronized-realtime(HSR)

新高考背景下深化高中教育教学改革应重视的几个问题

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

教学与管理 2025年第1期 12-14页

作者：司晓宏马永昊陕西师范大学教育学部西安710062 陕西省社会科学院西安710061

自2014年新高考改革启动以来,已在全国29个省市逐步推进。调研发现,新高考在实际推进中给普通高中传统的教育、教学和管理带来了诸多压力与挑战,这突出表现为:“选课走班制”在实际推行中存在许多堵点;“学生综合素质评价”面临着评价... 详细信息

自2014年新高考改革启动以来,已在全国29个省市逐步推进。调研发现,新高考在实际推进中给普通高中传统的教育、教学和管理带来了诸多压力与挑战,这突出表现为:“选课走班制”在实际推行中存在许多堵点;“学生综合素质评价”面临着评价标准不一、结果应用受限等困境;“学生生涯规划教育”存在着专业性不强、效果不佳等问题;学生多样化自由选课凸显教师队伍结构性缺编等。针对上述问题,应加强普通高中选课走班制的资源条件支持,健全学生综合素质评价的体制机制,提高学生生涯规划教育的专业性和精准度,积极破解改革所导致的教师结构性缺编问题,以推动和确保新高考改革各项政策有效落地实施。

关键词：新高考改革选课走班制学生综合素质评价生涯规划教育教育教学改革

Comparative plastomic analysis and insights into the phylogeny of Salvia (Lamiaceae)

在线全文

学校读者我要写书评

暂无评论

Plant Diversity 2021年第1期43卷 15-26页

作者： hong Wu Peng-Fei ma hong-Tao Li Guo-Xiong Hu De-zhu Li Germplasm Bank of Wild Species Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan650201China University of Chinese Academy of Sciences Beijing100049China College of Life Sciences Guizhou UniversityGuiyangGuizhou550025China

Salvia is the largest genus of Lamiaceae,with almost 1000 species,and has been divided into 11 *** ***,native to East Asia,is particularly important because of its potential medicinal ***,the interspecific relationships of this subgenus have not been resolved and the plastomes of Salvia have rarely been *** the current study,we compared plastid genome structure and organization of 19 species of Salvia(14 newly sequenced and 5 previously published).Our comparative analysis showed that all Salvia plastomes examined have a quadripartite structure typical of most angiosperms and contain an identical set of 114 unique genes(80 protein-coding genes,4 rRNA genes,and 30 tRNA genes).The plastome structure of all Salvia species is highly conserved like other Lamiaceae *** content,gene order,and GC content were highly similar in these *** inverted repeats/single copy region(IR/SC)boundaries of Salvia are highly conserved,and IR contraction only occurred in two species(Salvia mekongensis and ***).In Salvia,sequence divergence was higher in non-coding regions than in coding *** found that using large single copy(LSC)and small single copy regions(SSC)with exclusion of the rapidly evolving sites produced the highest resolution in phylogenetic analysis of Salvia,suggesting that using suitable informative sites to build trees is more conducive in phylogenetic *** study assembled a powerful matrix data set for studying the phylogeny of Salvia,resolving the interspecific relationship of Salvia *** newly sequenced plastid genomes will also enrich the plastome database of Salvia,providing the scientific basis for the development and utilization of germplasm resources of this large and important genus.

关键词： Lamiaceae Salvia subg.Glutinaria Plastome Phylogeny