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Changing Trend and Sustainable Development of Farmland Resources in Pingdingshan City,china

Asian Agricultural Research 2010年第11期2卷 34-36,41页

作者： YANG Jin-wei,LI Jian-minDepartment of Mathematics and information,Pingdingshan university,Pingdingshan 467000,{2.

The grey forecast and the sustainable use evaluation are conducted on the data of farmland resources from 2.10 to 2.2. in Pingingshan City by using the area of farmland land from 1999 to 2.10 and by applying the grey forecast and land pressure *** results show that from 2.10 to 2.2. the quantity of farmland resources maintains balance;the minimum per capita farmland in Pingdinshan stays around the lower limit of per capita amount of farmland in china;the pressure of farmland is rather huge and the farmland protection is not so ***,in order to realize the sustainable use of land resources in Pingdinshan City,the government should try to improve the efficiency of farmland use and implement stricter land protection *** well as the requisition-compensation balance of farmland resources,land consolidation and land reclaimation and so on.

关键词： Farmland in Pingdingshan City Grey forecast Minimu

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Multiqubit Nonlocal Operation and Physical Implementation

Multiqubit Nonlocal Operation and Physical Implementation

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第十二届全国量子光学学术会议

作者： Xiu-min Lin, Ming-yong Ye, Zheng-wei Zhou, Yong-sheng Zhang, Guang-can Guo ( School of Physics and Optoelectronics technology, Fujian Normal university, Fuzhou 3.0007, P. R.{2. Key Laboratory of Quantum {3., Department of Physics, university of science and technology of{2., Hefei 2.002., P. R.{2.)

＜正＞Two subsystems A and B prepared in the maximally entangled state simultaneously interact with two spatially distant quantum systems, then multiqubit nonlocal operation on the two quantum systems is directly implemented after measuring the states of subsystems A and B in reasonable bases. In this paper, we have also presented a

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Predictive Voltage Controlled SVPWM Algorithm Inverter for Stand-alone Wind Energy System

Predictive Voltage Controlled SVPWM Algorithm Inverter for S...

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第二届国际测量仪器与测试自动化学术会议

作者： Cao Hui~1 Cao Dong~2.Xu Yingying~1 1.Department of Electrical and Electronics Engineering,East china JiaoTong university,Nanchang,Jiangxi,{2.,3.0013.2.information technology College,Guangzhou university of Chinese Medicine,Guangzhou,Guangdong,{2. 510006

＜正＞For stand-alone wind energy system,the RMS value of output voltage must stability without being interfered with by the load condition,the total harmonic distortion（THD）of output voltage must be *** paper presents a predictive voltage controlled space vector pulse width modulation （SVPWM）algorithm inverter for the *** algorithm are investigated by computer simulations and validated by DSP2.12.*** results show that this algorithm is feasible.

关键词： Predictive Voltage Controlled SVPWM Stand-alone Wind Energy System

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Dispersion and nonlinearity in subwavelength-diameter optical fiber with high-index-contrast dielectric thin films

Dispersion and nonlinearity in subwavelength-diameter optica...

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2.10亚洲光电子会议量子光学和非线性光学分会场

作者： Wei Shu,Chujun Zhao,Shuangchun Wen Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of 1 Education,School of information science and Engineering,Hunan {2.,Changsha 410082.china

We have investigated the dispersion and the nonlinearity properties of the subwavelength-diameter optical fiber （SDOF） with high-index-contrast dielectric thin *** dispersion length and the nonlinearity length have been calculated to discuss the propagation properties of pulse in *** waveguide dispersion and nonlinearity analysis is used to guide the waveguide dimension design for possible *** high nonlinearity of SDOF makes it especially suitable for nonlinearity devices.

关键词： Numerical approximation and analysis thin films dispersion nonlinearity

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两栖机器人结构设计及运动学建模

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计算机工程与应用 2010年第10期46卷 60-63,104页

作者：张万绪张建斌张远西北大学信息科学与技术学院西安710127

两栖仿生机器人的研究是当前新兴的一个热点,它是军用机器人研究的一个重要分支。提出一种两栖仿生机器人的设计思路,确定了一些关键参数,如电机、游动机构等。并对两栖机器人仿鱼游动的运动学进行建模,最终通过实体仿真验证方案的可行性。

关键词：两栖机器人运动学实体仿真

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Fault Diagnosis Algorithm Based on Artificial Immune Mechanism

Fault Diagnosis Algorithm Based on Artificial Immune Mechani...

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2.09中国控制与决策会议

作者： Xu Xinying,Han Xiaoming,Xie Jun,Xie Keming College of information Engineering,Taiyuan university of {2.,Taiyuan,03.02.,china

＜正＞In recent years,there has been a growth of investigation into the use of artificial immune system as a source of inspiration and metaphor for computational *** this paper,we present a fault diagnosis algorithm based on artificial immune mechanism that can execute multi-point parallel search from local to global searching field and increase the diversity of antigen population and the ability of searching *** last,we apply this algorithm to the fault diagnosis *** studies show that the proposed method is feasible and recognize the fault correctly.

关键词： Artificial Intelligence Artificial Immune Mechanism Fault Diagnosis

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Transient Characteristics of Residual Meridional Circulation During Stratospheric Sudden Warming

Transient Characteristics of Residual Meridional Circulation...

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第七届全国优秀青年气象科技工作者学术研讨会

作者： Deng Shumei Anhui Institute of Meteorological sciences, Hefei, Anhui, china Chen Yuejuan Luo Tao and Bi Yun School of Earth and {2. sciences, university of science and technology of china, Hefei, Anhui, china

The residual meridional circulation derived from the thermodynamic equation can be separated into two parts, as Gille et al. （1987） did: the slowly varying diabatic circulation and the transient circulation. We calculated the transient and diabatic circulation. For the transient residual meridional circulation, it was calculated both including and omitting the eddy heat transport term in the transformed Eulerian-mean thermodynamic equation and continuity equation. We used daily European Centre for Medium-Range Weather Forecasts （ECMWF） reanalysis data for 14 stratospheric sudden warming （SSW） events from 1979 to 2.02. The results showed that calculations of transient residual meridional circulation present rapid variations during SSWs, with or without the eddy heat transport term. In the mid-SSW periods, the transient residual meridional circulation showed two cells at high northern latitudes: an upper one, with upward motion at the pole and descending motion in midlatitudes, and a lower one with circulation in the opposite sense. Totally different characteristics were observed in the pre-SSW and post-SSW periods. The daily variations in transient residual meridional circulation in the high-latitude regions from the pre-SSW period to the post-SSW period are also described in this paper. The transient residual meridional circulation results including and omitting the eddy heat transport term were carefully compared. Results indicated that although the patterns of transient residual meridional circulation including the eddy heat transport term were similar to that of the omitted eddy heat transport during SSW, the magnitudes in the upper stratosphere and high-latitude regions differed. Specifically, the transient residual meridional circulation including the eddy heat transport term was stronger than that of the omitted-eddy heat transport, and its variations at SSW onset were more rapid. Therefore, the eddy heat transport term should be included in the upper stratosp

关键词： Stratospheric sudden warming transient residual meridional circulation composite analysis

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Study of Transgenic technology in Breeding of Cotton Varieties

Study of Transgenic Technology in Breeding of Cotton Varieti...

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2.11 3.d IEEE International Conference on information Management and Engineering(ICIME 2.11)

作者： Zhaohui Liu 1 2.Zhang Yong 1 Zhenglong Ren 1 1 School of Life sciences and technology {2. of Electronic science and technology of china 2.Industrial Crop Breeding and Cultivation Institute Sichuan Academy of Agriculture sciences Chengdu china

Transgenic plants can directed improve plant traits and obtain a special innovative materials *** combine transgenic technology with conventional breeding techniques will be the future direction in the development of the cotton *** paper selected a few different transgenic cotton departments stemmed from the same transgenic receptors for the parents,by using the top cross method made up different *** these combinations by random block design to do strain comparative tests,to evaluate the transgenic accumulation effect and discuss the feasibility by adopting the transgenic accumulation technology to cultivate new cotton varieties.

关键词： upland cotton transgenic accumulation yield trait

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An Evaluation Model for Public Opinion Formation Based on Entropy

An Evaluation Model for Public Opinion Formation Based on En...

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2.10年中国通信国际会议

作者： Fan JIA1 Di XIE2.1School of Electronics and information Engineering Beijing Jiaotong university Key Laboratory of Communication&information Systems Beijing Municipal Commission of Education Beijing 100044 china 2.Huabei Computer technology Research Institute NCI Beijing 100083.china

The opinions of individuals change from chaos to order during the formation of public opinion, which is an evolution process of complex *** dynamic models have been proposed to explain successfully the mechanism of opinion ***,the number of opinion clusters is used to describe the final distribution of individual ***,there is a lack of a unified criterion for evaluation of opinion distribution among *** this paper,the notion of opinion entropy is introduced to quantitative describe the diversity of distribution of *** value of entropy at different situations such as consensus, bifurcation and fragment in the public opinion formation was *** the results,we found that opinion evolution is a process of entropy decreasing,and the opinion entropy is a useful tool in the study of opinion dynamics.

关键词： public opinion evolution entropy dynamics opinions distribution

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Discoticnematic Triphenylene Derivertives and their Application to an Optically Anisotropic Film

Discoticnematic Triphenylene Derivertives and their Applicat...

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Fifth International Conference on Surface Engineering

作者： Chunxiu Zhang1 2.Jialing Pu1 Zhiqun He2.1 information Recording Materials Lab Beijing Institute of Graphic Communication Beijing102.00 china 2.Key Laboratory of Luminescence and Optical information Ministry of Education Institute of Optoelectronic technology Beijing Jiaotong university Beijing 100044 china

The triphenylne derivatives are chosen as one of negative birefringent materials to form a compensator for widening the viewing *** liquid crystal molecules have positive birefringence in refractive *** anisotropy causes light leakage and results in narrow range of the viewing angle of the *** our study,a series of novel discotic triphenylene derivertives bearing one triphenylene discogen as core and three cyano-biphenyl moities was synthesized and their thermal behaviors were studied using polarizing optical microscope,differential scanning calorimeter and X-ray *** was found that those molecules containing even numbers of methylene spacers showed nematic *** being mixed with MMA（methyl methacrylate）,they also showed nematic phase at the mesophase temperature *** hybrid mode alignment of the molecules can be fixed by photopolymerization of acryloyl *** the alignment of the discotic molecules can be freely controlled,a new area of optically anisotropic film will be produced.

关键词： discotic liquid crystal triphenylene derivertives discoticnematic optically anisotropic film

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