检索结果-南通市图书馆

Changes in muscular strength and electromyogram in rats with muscular disuse atrophy following electrical stimulation

引用

Neural Regeneration Research 2006年第9期1卷 809-812页

作者： Xiaoyu Lü1, Xuanming Hao2 1Department of Rehabilitation and Physiotherapy, guangzhou General Hospital of guangzhou Military Area Command of Chinese PLA, guangzhou 510010, Guangdong Province, china 2college of Sports Science, south china Normal university, guangzhou 510631, Guangdong Province, china Department of Rehabilitation and Physiotherapy Guangzhou General Hospital Guangzhou Military Area Command Guangzhou 510010 Guangdong Province China college of Sports Science South China Normal University Guangzhou 510631 Guangdong Province China

BACKGROUND: Atrophy of skeletal muscle is found under the condition of muscular disuse or in the process of fixation. It is affected by fixation, and electromyogram (EMG) discharge and muscular strength levels will be significantly decreased with accelerating tendency. Electrical stimulation (ES) therapy can release the velocity of muscular disuse atrophy effectively, so it is an effective method for preventing and treating muscular disuse atrophy and accelerating rehabilitation velocity following removal of fixation. OBJECTIVE: To observe the effect of ES therapy at different time points following the fixation of rat models of muscular disuse atrophy on muscular strength and EMG of quadriceps femoris. DESIGN: A randomized and controlled animal experiment. SETTING: Department of Rehabilitation and Physiotherapy, guangzhou General Hospital of guangzhou Military Area Command of Chinese PLA; college of Sports Science, south china Normal university. MATERIALS: Male SD rats, of clean grade, aged 4 months old, weighing (230±10) g, were provided by the Animal Experimental Center of Sun Yat-sen university. EMG measurement and analysis system (NEC Company, Japan) and four-channel recorder (NEC Company, Japan) were used in this experiment. METHODS: This experiment was carried out in the Laboratory of Human Sports Science, south china Normal university between September 2003 and March 2004. Totally 125 successful SD rat models of muscular disuse atrophy were randomly divided into 5 groups with 25 rats in each by a lot: normal control group, in which, the rats were untouched; ES 24 hours, 1, 2 and 3 weeks groups: the knees of rats in these four groups were fixed. Rats in four groups underwent ES therapy at 24 hours, 1, 2 and 3 weeks after fixation. T90-Ⅱ computer ES muscular strength training instrument was used in ES therapy every other day. The instrument was set as square wave, 5 mA current intensity and 10 minutes a day. Muscular strength of quadriceps femoris and data of E

关键词： electrical stimulation disuse atrophy velocity of strength training animal experiment skeletal muscle used in strength of SD rat

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

MICROSTRUCTURES OF A NOVEL HIGH STRENGTH AND WEAR-RESISTING ZINC ALLOY

引用

中国有色金属学会会刊：英文版 1995年第4期5卷 84-88,132页

作者： Li Yuanyuan Xia Wei Ngai Tungwai Leo Luo Junming Zheng Lingyi(Department of Mechanical Engineering,south china university of technology, guangzhou 51064) south china Univ of technology Guangzhou China

ＭＩＣＲＯＳＴＲＵＣＴＵＲＥＳＯＦＡＮＯＶＥＬＨＩＧＨＳＴＲＥＮＧＴＨＡＮＤＷＥＡＲ－ＲＥＳＩＳＴＩＮＧＺＩＮＣＡＬＬＯＹＬｉＹｕａｎｙｕａｎ；ＸｉａＷｅｉ；ＮｇａｉＴｕｎｇｗａｉＬｅｏ；ＬｕｏＪｕｎｍｉｎｇ；Ｚｈｅ... 详细信息

ＭＩＣＲＯＳＴＲＵＣＴＵＲＥＳＯＦＡＮＯＶＥＬＨＩＧＨＳＴＲＥＮＧＴＨＡＮＤＷＥＡＲ－ＲＥＳＩＳＴＩＮＧＺＩＮＣＡＬＬＯＹＬｉＹｕａｎｙｕａｎ；ＸｉａＷｅｉ；ＮｇａｉＴｕｎｇｗａｉＬｅｏ；ＬｕｏＪｕｎｍｉｎｇ；ＺｈｅｎｇＬｉｎｇｙｉ（Ｄｅｐａｒｔｍｅ...

关键词： zinc alloy microstructure strength wear-resistance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Preparation and Performance of Geopolymers

引用

Journal of Wuhan university of technology(Materials Science) 2008年第3期23卷 326-330页

作者：郭文瑛 south china university of technology Key Laboratory of Specially Functional Materials and Advanced Manufacturing technology Ministry of EducationSouth China University of TechnologyGuangzhou 510640China

The influence of each factor on the reaction of geopolymers material was investigated by using the orthogonal experimental design method, which got the optimal condition of reaction. Based on this results the performances of geopolymers were investigated. The results are as follows：（1） The effect of each factor on the compressive strength of geopolymers was different; （2） For paste the optimal condition of reaction is that the modulus and the concentration of sodium silicate solution are 1.2 and 40%, the calcined temperature and calcined time of kaolin are 800 ℃ and 2 h, and the liquid-solid ratio is 1.25; （3） When the pH value of solution is higher than l, the compressive strength of Geopolymers will not decrease as that in the water; （4） As the calcined temperature of samples were lower than 700 ℃ the heat-resistant of geopolymers was good;（5） Geopolymers is unlikely to react with the active aggregate.

关键词： geopolymers cross experimental design method optimal condition performance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Calculation of Inelastic Neutron Scattering on ^(11)B

引用

Chinese journal of nuclear physics 1995年第3期17卷 265-267页

作者： Xie Wen-fang Department of Physics,Guangdong university of technology,guangzhou 510090Ruan Wen-ying Department of Physics,south china university of technology,guangzhou 510641 广东工业大学物理系广东广州 510090 华南理工大学物理系广东广州

The microscopic DWBA was used to calculate the inelastic neutron scattering on 11B to 2.14MeV excited state and some energy dependent parameters were used to improve the *** inte-grated inelastic cross sections and the angular distributions of the 11B（n,n′）11B*（2.14 MeV excitedstate）were given for the incident neutrons whose energy varies from 7.54 MeV to 20.0 *** also given for the experimental blank data.

关键词： Inelastic neutron scattering Microscopic DWBA Integrated cross section Angular distribution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Determining the Optimal Solution Set for Linear Fractional Programming

引用

Journal of Systems Engineering and Electronics 2002年第3期13卷 40-45页

作者： Xue Shengjia Management college, Jinan university,guangzhou 510632, P.R. china Management college Jinan University Guangzhou 510632 P. R. China

The structure of the optimal solution set is derived for linear fractional programming with the representation theorem of polyhedral sets. Based on an adaptation of the convex simplex method credited to Gilmore and Gomory, we give the uniqueness condition of optimal solution and the computational procedures to find all optimal solutions if the uniqueness condition is not satisfied. Finally, an illustrative example is also given.

关键词： Optimal systems Optimization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Chandra observations of the H_2O megamaser galaxy Mrk1210

引用

Science china(Physics,Mechanics & Astronomy) 2009年第6期52卷 960-968页

作者： ZHANG JiangShui & FAN JunHui Center for Astrophysics, guangzhou university, guangzhou 510006, china Center for Astrophysics Guangzhou University Guangzhou China

We present the first Chandra X-ray observations of the H2O megamaser galaxy Mrk1210 (UGC4203), a Seyfert 2 galaxy at an approximate distance of D～57.6 Mpc. The Chandra X-ray image, with by far the highest angular resolution (～1"), displays an unresolved compact core toward the nuclear region of Mrk1210. Comparisons with the previous X-ray observations in the nuclear emission and the spectral shape indicate a fairly stable phase between 2001 (BeppoSAX and XMM-Newton) and 2004 (Chandra) after a dramatic variation since 1995 (ASCA). The best-fit model of Chandra X-ray spectrum consists of two components. The soft scattered component can be best fitted by a moderately absorbed power-law model adding a spectral line at ～0.9 keV (possibly a Ne-Kα fluorescent line), while the hard nuclear component can be well reproduced by a heavily absorbed power-law model (NH～2×1023 cm-2) with an additional line at ～6.19 keV (close to the Fe-Kα fluorescent line). The derived absorption-corrected X-ray luminosity implies that the dramatic variation of spectral properties is caused by significant changes of the absorbing column density along the line-of-sight, while the intrinsic nuclear X-ray lu-minosity remains stable. In this case, the absorbers should be anisotropic and its size can be constrained to be less than 0.0013 pc. In addition, we also estimate the mass of central engine, the disk radius and the accretion rate of the accretion disk to be 107.12±0.31M⊙, ～1 pc and 0.006, respectively.

关键词： active galaxy nuclei Seyfert galaxy X-ray maser

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Imaging theory of nonlinear second harmonic and third harmonic generations in confocal microscopy

引用

Science china(Physics,Mechanics & Astronomy) 2004年第1期47卷 8-16页

作者： TANG Zhilie1, XING Da2 & LIU Songhao2 1. Department of Physics, south china Normal university, guangzhou 510631, china 2. School for Information and Optoelectronic Science and Engineering, south china Normal university, guangzhou 510631, china Correspondence should be addressed to Tang Zhilie (email: tangzhl@***) Received April 23, 2003 Department of Physics South China Normal University Guangzhou China School for Information and Optoelectronic Science and Engineering South China Normal University Guangzhou China

The imaging theory of nonlinear second harmonic generation (SHG) and third harmonic generation (THG) in confocal microscopy is presented in this paper. The nonlinear effect of SHG and THG on the imaging properties of confocal microscopy has been analyzed in detail by the imaging theory. It is proved that the imaging process of SHG and THG in confocal microscopy, which is different from conventional coherent imaging or incoherent imaging, can be divided into two different processes of coherent imaging. The three-dimensional point spread functions (3D-PSF) of SHG and THG confocal microscopy are derived based on the nonlinear principles of SHG and THG. The imaging properties of SHG and THG confocal microscopy are discussed in detail according to its 3D-PSF. It is shown that the resolution of SHG and THG confocal microscopy is higher than that of single- and two-photon confocal microscopy.

关键词： second harmonic generation, third harmonic generation, confocal microscopy, three-dimensional point spread function.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Three-Electron Quantum Dots in Zero Magnetic Field

引用

Communications in Theoretical Physics 2007年第12期48卷 1115-1118页

作者： XIE Wen-Fang Department of Physics,guangzhou university,guangzhou 510006,china Department of Physics Guangzhou University

By using the exact diagonalization method,a system of three electrons confined in a parabolic quantumdot in zero magnetic field is *** ground-state electronic structures and orbital and spin angular momentatransitions as a function of the confined strength are *** find that the confinement may cause accidentaldegeneracies between levels with different low-lying states and the inversion of the energy *** present,resultsare useful to understanding the optical properties and internal electron-electron correlations of quantum dot materials.

关键词： electron-electron interaction quantum dot semiconductor

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Single-phase of Supercritical CO_2/Polystyrene Solution in Foam Extrusion

引用

Journal of Wuhan university of technology(Materials Science) 2008年第6期23卷 804-808页

作者：吴晓丹 college of Mechanical and Electronic Engineering Guangdong Polytechnic Normal University

The high quality single-phase solution of CO2/ Polystyrene was achieved,by analyzing the influential factors for polymer microcellular foaming *** curve of pressure distribution along the barrel was *** axial position of gas-injecting port on the barrel was chosen form the results of stable foaming,and the number of gas-injecting ports in the circumference of the barrel was determined from the CO2 solubility in *** effect of the screw rotation speed on CO2 solubility was studied,and the effects of pressure difference between the gas and the polymer melt on gas-injecting process and on the foaming stability were *** influence of the gas temperature before injection on the single-phase of CO2/Polystyrene solution also was studied.

关键词： polymer extrusion foaming solubility single-phase solution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Reduction of the Modified Korteweg-de Vries Equation in the Bilinear Form

引用

Communications in Nonlinear Science and Numerical Simulation 1998年第1期3卷 3-5页

作者： Yanjuan ZHU (Department of Mathematics & Physics, Guangdong university of technology, guangzhou 510090, china) Department of Mathematics & Physics Guangdong University of Technology Guangzhou 510090 China

Ｔｈｅｔｒａｄｉｔｉｏｎａｌｍｅｔｈｏｄｆｏｒｆｉｎｄｉｎｇｓｉｍｉｌａｒｉｔｙｒｅｄｕｃｔｉｏｎｓｏｆａｇｉｖｅｎｐａｒｔｉａｌｄｉｆｅｒｅｎｔｉａｌｅｑｕａｔｉｏｎ（ＰＤＥ）ｏｒａｇｉｖｅｎＰＤＥｓｙｓｔｅｍｉｓ... 详细信息

Ｔｈｅｔｒａｄｉｔｉｏｎａｌｍｅｔｈｏｄｆｏｒｆｉｎｄｉｎｇｓｉｍｉｌａｒｉｔｙｒｅｄｕｃｔｉｏｎｓｏｆａｇｉｖｅｎｐａｒｔｉａｌｄｉｆｅｒｅｎｔｉａｌｅｑｕａｔｉｏｎ（ＰＤＥ）ｏｒａｇｉｖｅｎＰＤＥｓｙｓｔｅｍｉｓｔｏｕｓｅｔｈｅｃｌａｓｓｉｃａｌ...

关键词： similarity reductions classical Lie approach

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：