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186篇 您的检索式:作者名="Radio"
    题名 作者 年代 出处 被引量
1构建新型农民职业教育培训体系 全面推动农村小康社会建设显示文摘构建新型农民职业教育体系,是全面推动农村小康社会建设的必要条件。分析了我国农民职业教育体系的现状,并从这一现状出发,阐述新型农民职业教育培训体系的概念与内涵,提出构建这一体系的基本原则、体系框架、建设重点及主要模式。Training Center of Peasants’ Scientific and Technological Education of Ministry of Agriculture, Centural Government Radio and TV School of Agriculture, Beijing 100026, China) 2004职业技术教育2004,25,1:8
2Extended Fan's Algebraic Method and Its Application to KdV and Variant Boussinesq Equations显示文摘An extended Fan's algebraic method is used for constructing exact traveling wave solution of nonlinearpartial differential equations.The key idea of this method is to introduce an auxiliary ordinary differential equationwhich is regarded as an extended elliptic equation and whose degree Υ is expanded to the case of r>4.The efficiency ofthe method is demonstrated by the KdV equation and the variant Boussinesq equations.The results indicate that themethod not only offers all solutions obtained by using Fu's and Fan's methods,but also some new solutions.YANG Xian-Lin TANG Jia-Shi College of Mechanics and Aerospace,Hunan University,Changsha 410082,China2 Department of Computer Science,Hunan Radio and Television University,Changsha 410004,China 2007Communications in Theoretical Physics2007,,7:7
3GPS short-delay multipath estimation and mitigation based on least square method显示文摘The GPS multipath signal model is presented,which indicates that the coherent DLL outputs in multipath environment are the convolution between the ideal DLL outputs and the channel responses.So the channel responses can be estimated by a least square method using the observed curve of the DLL discriminator.In terms of the estimated multipath channels,two multipath mitigation methods are discussed,which are equalization filtering and multipath subtracting,respectively.It is shown,by computer simulation,that the least square method has a good performance in channels estimation and the multipath errors can be mitigated almost completely by either of the methods.However,the multipath subtracting method has relative small remnant errors than equalization filtering.Zhang Shengkang~(1,2),Wang Hongbo~(1,2),Yang Jun~(1,2) & He Leiming~(1,2) 1.Beijing Inst.of Radio Metrology and Measurement,Beijing 100854,P.R.China 2.National Key Laboratory of Metrology and Calibration Technology,Beijing 100854,P.R.China 2009Journal of Systems Engineering and Electronics2009,20,5:6
4High Efficiency ELID Grinding of Garnet Ferrite显示文摘Hard and brittle materials such as ferrite, optical glass and ceramics have been widely used in many fields because of their good characteristics and still gain more attentions. However, it is difficult to machine and get good surface quality. Some parts made of these materials have large machining allowances and need to be produced with large batch, but the machining efficiency is very low with usual grinding method. So it is of great importance to research the high efficiency grinding technology of hard and brittle materials. Electrolytic in-process dressing (ELID) grinding is a new grinding technology which has been adopted to the ultra-precision machining of hard and brittle materials. With the function of in-process dressing of metal bond diamond and CBN wheel, ELID grinding has the ability to keep the sharpness of the wheel surface and is widely used in fine abrasive grinding, but it also has the potentialities to high efficiency grinding. In this paper, the mechanism of ELID grinding and its grinding performance are analyzed, then the cast iron bond diamond wheels and ELID grinding device are used on a surface grinder to research the feasibility of ELID grinding to high efficiency grinding. To make comparison, the garnet ferrite (YAG) work piece has been machined in plunge grinding both by ELID grinding and by the resin bond diamond wheel. The grinding force and surface quality are tested and analyzed. It has been found that the grinding force of the cast iron bond diamond wheel with ELID grinding is apparently smaller than that of the resin bond diamond wheel. Under the same conditions, it is about 2/5~3/5 as the force using the resin bond diamond wheel. So with the same grinder and machining conditions, ELID grinding can machine work piece with greater depth of cut. Because of the smaller grinding force, it is also beneficial to avoid the edge collapse of the work piece and keep the integrity of the grinding surface. This experiment shows that the grinding efficiency can be highly improved and the surface quality be ensured by applying ELID grinding technology and adopting large grinding depth. The results indicate that the ELID grinding technology can be effectively used in the high efficiency machining of garnet ferrite and other hard and brittle materials.ZHANG Fei-hu 1, QIU Zhong-jun 1, KANG Gui-wen 1, YUAN Zhe-jun 1, YANG Yong-shan 2, SHI Xing-kuan 2 (1. Department of Mechanical Manufacturing and Automation, Harbin Institute of Technology, Harbin 150001, China 2. Beijing Radio Measuring Institute, Beijing 100854, China) 2002厦门大学学报(自然科学版)2002,41,S1:4
5Classification of Wavelet Bases by Translation Subgroups and Nonharmonic Wavelet BasesQiao Wang Department of Radio Engineering,Southeast University,Nanjing 210096,P.R.China 2000Acta Mathematica Sinica,English Series2000,16,2:3
6A Prediction Model of Peasants’ Income in China Based on BP Neural Network显示文摘According to the related data affecting the peasants’ income in China in the years 1978-2008,a total of 13 indices are selected,such as agricultural population,output value of primary industry,and rural employees.Based on the standardized method and BP neural network method,the peasants’ income and the artificial neural network model are established and analyzed.Results show that the simulation value agrees well with the real value;the neural network model with improved BP algorithm has high prediction accuracy,rapid convergence rate and good generalization ability.Finally,suggestions are put forward to increase the peasants’ income,such as promoting the process of urbanization,developing small and medium-sized enterprises in rural areas,encouraging intensive operation,and strengthening the rural infrastructure and agricultural science and technology input.GUO Qing-chun1,HE Zhen-fang2,LI Li3,KONG Ling-jun1,ZHANG Xiao-yong1,KOU Li-qun1 1.Shaanxi Radio &TV University,Xi’an 710068,China 2.Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lan’zhou 730000,China 3.Institute of Earth Environment,Chinese Academy of Sciences,Xi’an 710075,China 2011Asian Agricultural Research2011,3,4:2
7ADVANCED HIGH GRADIENT TECHNOLOGY FOR CASTING OF SUPERALLOY TURBINE BLADES显示文摘ADVANCEDHIGHGRADIENTTECHNOLOGYFORCASTINGOFSUPERALLOYTURBINEBLADESE.N.Kablov(All-RussianScientificResearchInstituteofAviationM...E.N. Kablov(All-Russian Scientific Research Institute of Aviation Materials (VIAM) 17 Radio St., Moscow, Russia ) 1996Acta Metallurgica Sinica(English Letters)1996,9,6:2
8Parvovirus B19 is a bystander in adult myocarditis显示文摘Scott A. Koepsell Daniel R. Anderson Stanley J. Radio 2012Cardiovascular Pathology2012,,6:2
9DIFFERENTIAL AMPLITUDE PHASE SHIFT KEYING: A NEW MODULATION METHOD FOR TURBO CODE IN DIGITAL RADIO BROADCASTING显示文摘The multilevel modulation techniques of M-Differential Amplitude Phase Shift Keying (DAPSK) have been proposed in combination with Turbo code scheme for digital radio broadcasting bands below 30 MHz radio channel. Comparison of this modulation method with channel coding in an Additive White Gaussian Noise (AWGN) and multi-path fading channels has been presented. The analysis provides an iterative decoding of the Turbo code.Khalid H. Sayhood Wu Lenan (Radio Engineering Department, Southeast University, Nanjing 210096) 2003Journal of Electronics(China)2003,20,2:2
10A survey of methods for calculating transmission line conductor surface gradients显示文摘IEEE Corona and Field Effects Sub Committee Report Radio Noise Working Group 1979IEEE Transactions on Apparatus and System1979,98,6:1
11All-digital synthesizer and discrete-time receiver for in 130 nm CMOS显示文摘Staszewki R B TX frequency Bluetooth radio Circuits 2004 Muhammad K Leipold D 2004IEEE J Solid State2004,39,12:1
12积极探索 大胆实践 构建人才培养新模式显示文摘“中央广播电视大学人才培养模式改革和开放教育试点”项目是“现代远程教育工程”的重要组成部分。杭州广播电视大学作为首批试点单位之一,通过近6年的有益探索和实践,现已形成了“1357”人才培养模式。所谓“1357”是指围绕“一个中心”,强化“三维管理”,完善“七大保障”。文章主要对这一模式进行了具体阐释。Hangzhou Radio & TV University 2005南京广播电视大学学报2005,,4:1
13A syrvey of methods for calculating transmission line conductor surface gradients显示文摘IEEE Corona and Field Effects Subcommittee Report Radio Noise Working Group 1979IEEE Trans on Power Apparatus and Systems1979,98,6:1
14CHAOTIC NEURAL NETWORK FOR ASSOCIATIVE MEMORY显示文摘Based on current research on applications of chaotic neuron network for information processing, the stability and convergence of chaotic neuron network are proved from the viewpoint of energy function. Moreover, a new auto-associative matrix is devised for artificial neural network composed of chaotic neurons, thus, an improved chaotic neuron network for associative memory is built up. Finally, the associative recalling process of the network is analyzed in detail and explanations of improvement are given.Zhang Yifeng Yang Luxi He Zhenya(Department of Radio Engineering, Nanjing, 210018) 1999Journal of Electronics(China)1999,16,2:1
15Comparison of PC12 and eerebellar granule cell cultures for evaluating neurite outgrowth u- sing high content analysis 显示文摘Radio NM Freudenrich TM Robinette BL 2010Neurotoxieol Teratol2010,32,1:1
16A PATTERN RECOGNITION APPROACH FOR TONE CLASSIFICATION OF ISOLATED SYLLABLE IN PUTONGHUA显示文摘In this paper,a new approach of pattern recognition for tone classification of Putonghua Which is im-portant for speech recognition of Putonghua is discribed.In this method,four parameters of the fundamen-tal frequency trajectory are selected based on a large number of statistical experiments.It is assumed thatthe four parameters satisfy multidimensional Gaussion distribution and a non-Euclidean distancefunction for each tone class is derived according to the rule of minimum probability of calssification error.the optimal decision results are obtained in a sense of statistics.It is proved that this method provides verysatisfactory results by the experiments for speaker-independent tone classification of Putonghua.HUANG Zezhen and YANG Xingjun(Department of Radio Electronics . Tsinghua University ) 1989Chinese Journal of Acoustics1989,8,4:1
17A survey of methods for calculating transmission line conductor surface gradients显示文摘IEEE Corona and Field Effects Subcommittee Report- Radio Noise Working Group 1979IEEE Transaction on Power Apparatus and Systems1979,98,6:1
18A survey of methods for calculating transmission line conductor surface gradients显示文摘IEEE Corona and Field Effects Subcommittee Report Radio Noise Working Group 1979IEEE Trans on Power Apparatus and Systems1979,98,6:1
19A survey of methods for calculating transmission line conductor surface voltage gradients显示文摘IEEE Corona and Field Effects Subcommittee Report Radio Noise Working Group 1979IEEE Trans on PAS1979,98,6:1
20Assessment of chemical effects on neufite outgrowth in PC12 cells using high content screening 显示文摘Radio NM Breier JM Shafer TJ 2008Toxicol SCi2008,105,1:1
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