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Integrating Computer-Mediated Communication into an EAP course

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Frontiers of Education in China 2006年第4期1卷 589-600页

作者： Li Xiao cao Ru-hua International Office Shandong Jianzhu UniversityJinan 250101China School of Foreign Languages Shandong Jianzhu UniversityJinan 250101China

The development of the computer along with the widespread use of the Internet has rapidly promoted Computer-Mediated Communication(CMC)as a very important communication media,which can be used widely and effectively in foreign language teaching and *** essay tries to explore the advantages of CMC as well as its proposed application,beginning with the introduction of some concepts related to *** the research history,the rationale of using CMC in foreign language learning is *** context of an EAP course is introduced and some suggestions on using CMC in this course are proposed.

关键词： Computer-Mediated Communication(CMC) synchronous CMC asynchronous CMC English for academic purposes(EAP)

Protective Roles of Brassinolide on Rice Seedlings under High Temperature Stress

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Rice science 2008年第1期15卷 63-68页

作者： cao Yun-ying ZHAO Hua College of Life Science Nantong University Nantong 226007 China Key Laboratory of Crop Genetics ＆ Physiology YangzhouUniversity Yangzhou 225009 China

Two indica rice （Oryza sativa L.） materials, Xieqingzao B （sensitive to heat stress） and 082 （tolerant to heat stress） were used to study the role of brassinolide （BR） in protection of rice seedlings from heat stress. Young seedlings were subjected to high temperature （38℃/30℃） and sprayed with 0.005 mg/L of BR. Analysis was conducted on the contents of chlorophyll, protein and malondialdehyde （MDA）, the leakage of electrolyte, the activities of peroxidase （POD） and superoxide dismutase （SOD） and their isozymes expression levels in leaves. Under the high temperature treatment, application of BR significantly increased the contents of chlorophyll and protein, and the activities of POD and SOD, and reduced the content of MDA and the leakage of electrolyte in the leaves of the heat-sensitive material Xieqingzao B, whereas BR had less effect on those of the heat-tolerant material 082 relatively. The BR treatment enhanced the expression of POD isozymes in the leaves of both materials. Under the high temperature stress and BR treatment, the expression of four SOD isozymes reduced in 082, but the expression of two SOD isozymes increased in Xieqingzao B. This suggests that BR plays an important role in protection of rice seedlings from heat stress by enhancing the activities or expression level of protective enzymes in the leaves. The materials with various heat-tolerance might differ in the mechanism of response to heat stress with BR application.

关键词： brassinolide rice seedlings heat stress antioxidase membrane lipid peroxidation

Operators on Sobolev Type Spaces

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Communications in Mathematical Research 2023年第2期39卷 254-286页

作者： Guangfu cao Li He School of Mathematics and Information Science Guangzhou UniversityGuangzhouGuangdong 510006P.R.China

In this paper,we introduce the work done on Hardy-Sobolev spaces and Fock-Sobolev spaces and their operators and operator algebras,including the study of boundedness,compactness,Fredholm property,index theory,spectrum... 详细信息

关键词： Hardy-Sobolev space Fock-Sobolev space multiplier composition operator Toeplitz operator Hankel operator

Single crystalline CeO_(2) nanotubes

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Nano Research 2021年第3期14卷 715-719页

作者： Fangxian cao Mingkai Zhang Kaili Yang Zhimin Tian Jing Li Yongquan Qu Frontier Institute of Science and Technology Xi’an Jiaotong UniversityXi’an710049China College of Chemistry and Chemical Engineering Liaocheng UniversityLiaocheng252059China Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an710072China

Here,we report a facile synthetic methodology to prepare uniform single crystalline CeO_(2) nanotubes through a hydrothermal transformation of CeO_(2) nanorods in aqueous Ce(NO3)3 solution.A chemically driven etching-dissolution-deposition mechanism is proposed,involving the surface Ce^(3+)hydrolysis and dissolution at tips of nanorods and subsequent redeposition and crystallization on the outer sides of *** to CeO_(2) nanorods,CeO_(2) nanotubes exhibited the richer structural defects,higher reducibility and larger surface area,leading to a higher haloperoxidase-like activity.

关键词： CeO_(2)nanorod hydrothemal transformation CeO_(2)nanotube etching-dissolution-deposition mechanism haloperoxidase-like activity

Dzyaloshinskii-Moriya Interaction in Spin 1/2 Antiferromagnetic Rings with Nearest Next Neighbor Coupling

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Chinese Physics Letters 2013年第4期30卷 189-191页

作者： LI Peng-Fei cao Hai-Jing ZHENG Li Department of Mathematics and Physics Shanghai University of Electric PowerShanghai 200090

We numerically investigate the magnetoelastic(ME)instability in spin 1/2 antiferromagnetic rings with nearest-next neighbor(NNN)coupling J_(2)and Dzyaloshinskii–Moriya(DM)interaction D_(z).It is found that,for a given Dz,there exists a critical J_(2)^(c).As J_(2)=J_(2)^(c),the ME instability is irrelative to the DM interaction and NNN *** results may come from the competition between the DM interaction and NNN *** DM interaction does not affect the critical behavior at the point of J_(2)=0.5,at which the systems always locate in the dimerized state.

关键词： state. interaction critical

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江苏城市化的科学发展观思维

中国人口·资源与环境 2005年第4期15卷 100-104页

作者：戴军张京祥曹荣林南京大学城市与资源学系江苏南京210093

在当前经济全球化日益加速的时代背景下,江苏城市化发展正面临新的发展机遇和挑战,处于快速发展的转型时期。通过对科学发展观在城市化发展中的定位思考,提出城市化发展过程中应注意的五个科学发展原则。在此战略原则的指导下,回顾总结... 详细信息

在当前经济全球化日益加速的时代背景下,江苏城市化发展正面临新的发展机遇和挑战,处于快速发展的转型时期。通过对科学发展观在城市化发展中的定位思考,提出城市化发展过程中应注意的五个科学发展原则。在此战略原则的指导下,回顾总结了江苏省城市化进程中存在的粗放式速度增长与内涵式演变的错位、地域不平衡性与城乡差异性的加剧、城市体系的功能发挥失衡、缺乏区域协调与合作、人与生态环境的不和谐五个方面的问题,并以贯彻落实科学发展观思维为视角,从科学制定和实施城乡规划、构筑城市经营效率机制、把握沿江开发契机等措施层面,就全面推进江苏城市化科学发展作出了对策思考。

关键词：科学发展观江苏省城市化对策

Impact of meteorological factors on the prevalence of porcine pasteurellosis in the southcentral of China's mainland

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Impact of meteorological factors on the prevalence of porcin...

采用Gauss伪谱法的小推力日-火Halo轨道转移优化设计

中国畜牧兽医学会信息技术分会第十二届学术研讨会

作者： Gao xiang Xiao Jianhua Qin Hongyu cao Zheng Wang Hongbin Department of Veterinary Surgery Northeast Agricultural University

Using data collected from 2006 to 2014,we applied geographic information system(GIS) mapping and spatial clustering analysis to evaluate prevalence of porcine pasteurellosis in all 31 provinces of China’s *** provinces have been affected,but our results show that there is a very high incidence in provinces of the southcentral of China’s *** provinces comprise the area and account for 14082 outbreaks or 74.66%of the total 18862 number:Guangxi(4574),Sichuan(3493),Chongqing(2443),Guangdong(1584),Guizou(1041) and Yunnan(947).This study aims to evaluate the relation between meteorological factors and number of cases of porcine pasteurellosis in the southcentral of China’s *** meteorological variables and case data of porcine pasteurellosis were provided by *** rank correlation analysis and cross-correlation analysis were used to control for collinearity and lag effects.A zero-inflated Poisson model was used to estimate the probability of an impact of meteorological factors on the epidemiology of porcine *** results of this model indicated that ENSO have a positive effect on the occurrence of the *** there are a positive correlation between mean monthly temperature,relative humidity of the current and previous month and the number of cases of the *** contrast,average wind speed of the current month negatively correlated with the number of newly reported *** findings indicate that there may exist meteorological conditions in the southcentral of China’s mainland that increase the risk for the appearance of porcine ***,these meteorological variables may be used to estimate the number of disease’ cases in this region.

关键词： Porcine pasteurellosis meteorological factor southcentral of China’s mainland spatial analysis Local Moran’s index zero-inflated Poisson Spearman rank correlation analysis Interclass Correlation Coefficient

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宇航学报 2013年第8期34卷 1047-1054页

作者：曹喜滨张相宇王峰哈尔滨工业大学卫星技术研究所哈尔滨150080

针对日-地Halo轨道到日-火Halo轨道的小推力轨道转移问题,给出一种基于不变流形理论和Gauss伪谱法的优化设计方法。首先,在日心惯性坐标系中建立小推力轨道优化模型,并基于不变流形理论给出轨道转移中流形出口和入口的选择原则,应用该... 详细信息

针对日-地Halo轨道到日-火Halo轨道的小推力轨道转移问题,给出一种基于不变流形理论和Gauss伪谱法的优化设计方法。首先,在日心惯性坐标系中建立小推力轨道优化模型,并基于不变流形理论给出轨道转移中流形出口和入口的选择原则,应用该原则在日-地系统中选择流形出口,在日-火系统中选择流形入口,并将其作为轨道转移的初末状态;然后基于Gauss伪谱法将最优控制问题离散化为非线性规划(NLP)问题,并采用基于逆多项式的形状算法给出了NLP初值的计算方法;最后对该轨道转移问题进行了数学仿真。仿真结果表明:Gauss伪谱法可有效用于小推力日-火Halo轨道转移的优化,且采用逆多项式形状算法得到的初值具有初始误差小,使得NLP收敛速度快的特点。

关键词： Gauss伪谱法不变流形 Halo轨道小推力

Escrow-Free Certificate-Based Authenticated Key Agreement Protocol from Pairings

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Wuhan University Journal of Natural Sciences 2007年第1期12卷 63-66页

作者： WANG Shengbao cao Zhenfu School of Electronic Information and ElectricalEngineering Shanghai Jiao Tong University Shanghai200240 China

Key agreement protocols are essential for secure communications. In this paper, to solve the inherent key escrow problem of identity-based cryptography, an escrow-free certificate-based authenticated key agreement （CB-AK） protocol with perfect forward secrecy is proposed. Our protocol makes use of pairings on elliptic curves. The protocol is described and its properties are discussed though comparison with Smart＇s protocol.

关键词： authenticated key agreement (AK) certificatebased encryption (CBE) pairings session key escrow perfect forward security