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Research on Efficiency Optimization of Interior Permanent Magnet Synchronous Motor Based on Intelligent Integrated Control

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Research on Efficiency Optimization of Interior Permanent Ma...

2010 Chinese Control and Decision Conference

作者： Sheng Yifa~(1,2),Yu Shou-yi~2,Zhou Wen-zhen~1 1.College of Electrical Engineering,university of south china,Hengyang,421001,china 2.Institute of Information Science and Engineering,,central china university,changsha,410083,china

＜正＞To improve the steady state efficiency of interior permanent magnet synchronous motor system（IPMSM）,the intelligent integrated online optimal control strategy of IPMSM efficiency optimization was *** intelligent integrated control technology and torque compensation method were combined to the *** method of adaptive fuzzy logic to adjust direct-axis current was adopted in the first half search,using the adaptive step size to reduce the torque *** golden section search method was adopted in the next half search to speed up the search process and improve its *** in the whole process,the torque correction program was introduced to compensate the torque current in real-time and resolve the torque pulsation problem in the regulation process of the excitation *** dynamic and static performances of the system are improved.A 100kW IPMSM efficiency optimization intelligent integrated control system was implemented using a TMS320LF2407A *** results prove the validity of the proposed strategy.

关键词： railway vehicles interior permanent magnet synchronous motor efficiency optimization intelligent integrated control

Delay-dependent Stabilization of Singular Linear Time Delay Systems Based on Memory state Feedback Control

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Delay-dependent Stabilization of Singular Linear Time Delay ...

第二十七届中国控制会议

作者： Jiang Zhaohui,Gui Weihua,Xie Yongfang,Yang Chunhua School of Information Science and Engineering,central south university,changsha 410083,P.R.china

In this paper,the delay-dependent stabilization problem for singular linear time-delay systems is studied by designing a delay-dependent memory state feedback controller which makes the singular linear time-delay systems regular,impulse free and asymptotically ***,the lemma of descriptor integral-inequality is ***,delay dependent stabilization conditions are established by using the Lyapunov-Krasovskii functional approach combined with a descriptor ***,an LMI based algorithm to design a memory state feedback control that stabilizes the system is ***,a numerical example is presented to illustrate the effectiveness and the availability for the design.

关键词： Descriptor integral-inequality Singular time-delay systems Memory state feedback control Delay-dependent stability Linear matrix inequality

短炭纤维/沥青炭复合材料导热系数与石墨化度的关系

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炭素技术 2003年第6期22卷 23-26页

作者：黄启忠张福勤中南大学粉末冶金国家重点实验室湖南长沙410083

采用脉冲激光闪光法和XRD技术,分析了一种短炭纤维增强沥青炭复合材料的导热系数与石墨化度之间的关系,建立了两者之间的定量数学模型,并运用声子导热机制对其机理进行了分析。结果表明,随着石墨化度的升高,石墨微晶尺寸增大、结构渐趋... 详细信息

采用脉冲激光闪光法和XRD技术,分析了一种短炭纤维增强沥青炭复合材料的导热系数与石墨化度之间的关系,建立了两者之间的定量数学模型,并运用声子导热机制对其机理进行了分析。结果表明,随着石墨化度的升高,石墨微晶尺寸增大、结构渐趋完整,复合材料在平行于层面方向的室温导热系数逐渐升高,导热系数与石墨化度之间关系符合公式:λ=59.18+0.53exp(g/14.80)。

关键词：沥青炭 C/C复合材料石墨化度导热系数

EFFECT OF CRACK-STOPPING HOLE ON SHEAR FRACTURE OF ROCK

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EFFECT OF CRACK-STOPPING HOLE ON SHEAR FRACTURE OF ROCK

The 7th International Symposium on Rockburst and Seismicity in Mines(RaSiM7)

作者： QIUHUA RAO,HAIFENG XIE,QIANG XIE,ZHI WANG College of Civil Engineering and Architecture,central south university changsha,Hunan,410083,P.R.china

Effect of crack-stopping hole on shear(ModeⅡ) fracture of rock is studied numerically and *** element method through the displacement approach is used to calculate the shear stress intensity factors of the specimens with and without symmetrical double holes,Kand K Shear-box test and new electrometric method with conductive glue are adopted to measure the maximum shear stress intensity factor(K),stable shear crack propagation rate(V) and time(T) of these specimens in order to find out optimal double holes for shear crack-stopping. Results show that the effect of crack-stopping hole on shear fracture of rock specimen depends on its location and size,which can be denoted by a regression equation about the ratio of K/K and the three parameters, radius(R),distance away from the notch tip(L) and distance between the two holes(S).The more the R and L,the larger the K/K and the easier to fracture the rock ***,the more the 5,the smaller the K/K and the more difficult to propagate the shear *** R and L are the smallest and S is the largest,the specimen with double holes has the largest values of K and T and the smallest value of V,which is most favourable to shear crack-preventing. Adding optimal double holes symmetrical with respect to the original crack plane is an effective method for shear crack arresting of brittle rock.

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A regression analysis of the effect of natural disaster on agriculture

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A regression analysis of the effect of natural disaster on a...

2011 International Conference on Business Management and Electronic Information(BMEI 2011)

作者： Zhongcheng Wang 1,Chunhua Li 1,2,Wei Liu 1 1 College of science,central south university of Forestry and Technology,changsha china,2.state key laboratory of Earth Surface Processes and Resource Ecology,Beijing Normal university,Academy of Disaster Reduction and Emergency Management,Ministry of Civil Affairs & Ministry of Education,key laboratory of Environmental Change and Natural Disaster,Ministry of Education of china,Beijing china

Based on the grain production data and agriculture statistical data from 1995 to 2005,factors of grain production in china is discussed by the model of gray correlative *** results show that Consumption of chemical fertilizers,Effective irrigated area,grain sown area and stricken area,Total power of agriculture machinery are the most important factors that affect grain *** investigate the impacts of natural disaster on productivity of Jiangsu Province’s grain production,Agricultural productivity was specified as a function of its natural disaster and gross additions of fixed assets during the *** square （LS） was employed to estimate equation *** reports the results of a regression analysis of the relationship between rate of suffered grain production and agricultural *** study is based on the analysis of the yearbook data for the period 1978-2004.

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Caveolae/caveolin-1-mediated Inflammation and Cholesterol Efflux in Lipid-loaded Cells

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Caveolae/caveolin-1-mediated Inflammation and Cholesterol Ef...

第八届海峡两岸心血管科学研讨会

作者： Duan-fang Liao~(1*),Di-xian Luo~2,Li Qin~(1,2),Shao-wei Sun~2,Chao-ke Tang~2 (1.Division of Stem Cell Regulation and Application,state key laboratory of Chinese Medicine powder and Medicine Innovation in Hunan(incubation),Hunan university of Chinese Medicine,changsha,420108,china 2.Institute of Pharmacy & Pharmacology, university of south china,Hengyang 421001)

＜正＞Cholesterol reverse transport and inflammation response play important roles in development of atherosclerosis. The former belongs to classical theory of lipid metabolism,and the latter to modern theory of inflammation *** role of the two theories in the development of atherosclerosis is the important question in dispute in academic *** on our research and references,we recognize that there is interaction and inter-relation between cholesterol transmembrane transport and inflammation *** prevention of cholesterol reverse transport leads to inflammation response,and inflammation response destroys the capability of cholesterol transmembrane transport.（1 ） Interaction between inflammation response and cellular cholesterol reverse *** is an inflammation factor by *** cholesterol is too much,it stimulates p38 MAPK by toll - like receptor to induce inflammation ***,immune inflammation response destroys the capability of cholesterol reverse *** inflammation factors such as tumor necrosis factor - 1（TNF - 1）,interleukin - 1 beta（IL - 1 β ）,interleukin - 6（IL - 6 ）,significantly inhibit cellular cholesterol *** inflammation induced by LPS - made Gram - negative bacteria injected into animals leads to the reduction of cholesterol reverse transport.（2） Caveolae/caveolin - 1 as the center of cholesterol reverse *** for being the cholesterol transport center,caveolin - 1 itself is involved in cholesterol *** - 1 regulates lipid transmembrane movement by forming cholesterol transportation complex consisting of caveolin - 1,cyclophilin A,cyclophilin 40,HSP90,and HSP56,and cholesterol ester transportation complex consisting of caveolin - 1,cyclophilin A,cyclophilin 40,HSP90,and Annexin - *** - 1 regulates the expression of several lipoprotein receptors such as SR - BI、LOX-1,and cholesterol transport proteins such as ABC A1（ABC G1 ）.（3 ） Caveolae/caveolin -

关键词： caveolae caveolin-1 inflammation cholesterol reverse transport atherosclerosis

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纳米控释抗癌药物研究进展

山东生物医学工程 2003年第1期22卷 48-51,43页

作者：李和平阮建明丁志伟中南大学粉末冶金国家重点实验室长沙410083 长沙电力学院化学系长沙410077

与普通抗癌药物相比 ,纳米控释抗癌药物具有可靶向输送、缓释药物、延长给药时间和减少毒副作用等优点 ,因而具有广阔的应用前景。本文针对目前国内外正在研究并取得一定进展的纳米控释抗癌药物。

关键词：纳米控释抗癌药物纳米载体材料纳米控释系统药物释放机制制备

Embryonic stem cells generated by nuclear transfer of human somatic nuclei into rabbit oocytes

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Cell Research 2003年第4期13卷 251-263页

作者： YING CHEN, ZHI Xu HE, AILIAN LIU, KAI WANG, WEN WEI MAO, JIAN XIN CHU, YONG LU, ZHENG Fu FANG, YING TANG SHI, QING ZHANG YANG, DA YUAN CHEN, MIN RANG WANG, JIN SONG LI, SHAO LIANG HUANG, XIANG YIN KONG, YAO ZHOU SHI, Zm QIANG WANG, JIA HuI XIA, ZHI GAO LONG, ZHI GANG XUE, WEN XIANG DING, HuI ZHEN SHENG Center for Developmental Biology, Shanghai Second Medical university, Shanghai 200092, china laboratory of Stem Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 1665 Kong Jiang Road, Shanghai 200092, china Center for Stem Cell Research, the Second Affiliated Hospital, Sun Yat-Sen university, Guangzhou 510120,china state key laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, 19 Zhong-guan Cun Road, Haidian District, Beijing 100080, china Health Science Center, Shanghai Institutes of Biological Sciences, Chinese Academy of Sciences and Shanghai Second Medical university, Shanghai 200025, china National laboratory of Medical Genetics, central south university, 88 Xiangya Road, changsha 410078, china Xinhua Hospital, Shanghai Second Medical university, 1665 Kong Jiang Road, Shanghai 200092, china 2laboratory of Stem Cell Biology Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences 1665 Kong Jiang Road Shanghai 200092 China. 3Center for Stem Cell Research the Second Affiliated Hospital Sun Yat-Sen University Guangzhou 510120 China. 2laboratory of Stem Cell Biology Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences 1665 Kong Jiang Road Shanghai 200092 China. 2laboratory of Stem Cell Biology Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences 1665 Kong Jiang Road Shanghai 200092 China. 2laboratory of Stem Cell Biology Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences 1665 Kong Jiang Road Shanghai 200092 China. 2laboratory of Stem Cell Biology Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences 1665 Kong Jiang Road Shanghai 200092 China. 2laboratory of Stem Cell Biology Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences 1665 Kong Jiang Road Shanghai 200092 China. 2laboratory of Stem Cell Biology Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences 1665 Kong Jiang Road Shanghai 200092 China. 2laboratory of Stem Cell Biology Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences 1665 Kong Jiang Road Shanghai 200092 China. 2laboratory of Stem Cell Biology Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences 1665 Kong Jiang Road Shanghai 200092 China. 4state key laboratory of Reproductive Biology Institute of Zoology Chinese Academy of Sciences 19 Zhong-guan Cun Road Haidian District Beijing 10008

To solve the problem of immune incompatibility, nuclear transplantation has been envisaged as a means to produce cells or tissues for human autologous transplantation. Here we have derived embryonic stem cells by the transfer of human somatic nuclei into rabbit oocytes. The number of blastocysts that developed from the fused nuclear transfer was comparable among nuclear donors at ages of 5, 42, 52 and 60 years, and nuclear transfer (NT) embryonic stem cells (ntES cells) were subsequently derived from each of the four age groups. These results suggest that human somatic nuclei can form ntES cells independent of the age of the donor. The derived ntES cells are human based on karyotype, isogenicity, in situ hybridization, PCR and immunocytochemistry with probes that distinguish between the various species. The ntES cells maintain the capability of sustained growth in an undifferentiated state, and form embryoid bodies, which, on further induction, give rise to cell types such as neuron and muscle, as well

关键词： nuclear transfer (NT) somatic cell nuclear transfer (SCNT) embryonic stem cells (ES cell) therapeutic cloning rabbit oocyte.

成分对高温永磁体Sm(CoFeCuZr)_z显微组织和磁性能的影响

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金属功能材料 2003年第2期10卷 25-30页

作者：杜娟彭元东易健宏李丽娅中南大学粉末冶金国家重点实验室长沙410083

成分是影响Sm(CoFeCuZr) z 性能的关键因素之一。本文概述了成分对高温永磁体Sm(CoFeCuZr) z 显微组织和磁性能影响的研究状况。并指出了掌握成分与显微组织和磁性能的关系 ,对制造高性能高温永磁体Sm(CoFeCuZr) z 的现实意义。

关键词：高温永磁体成分显微组织磁性能