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122篇 您的检索式:作者名="Mobile"
    题名 作者 年代 出处 被引量
1Mobile Ubiquitous Service Environment显示文摘The Mobile Ubiquitous Service Environment (MUSE),established through the coordination and integration of mobile telecommunications and ubiquitous network,in the pursuit of Always Best Experience (ABE),represents the major development trend for the next generation mobile wireless network. Research on MUSE will involve the integration of the computing model system,service platform system,operating system and terminal structure system,all of which involve exploration and innovation of a new networking structure,its control and management as well as way of measuring. The change in network resources triggers the change in network computing models. To let readers have a basic understanding of MUSE,this lecture introduces it in four sections. This section focuses on the development and demand analysis of the service platform.Zhang Ping,Ji Yang,Feng Zhiyong (Research Center for Wireless New Technology,Beijing University of Posts and Telecommunications,Beijing 100876,China) The Mobile Ubiquitous Service Environment (MUSE),established through the coordination and integration of mobile telecommunications and ubiquitous network,in the pursuit of Always Best Experience (ABE),represents the major development trend for the next generation mobile wireless network. Research on MUSE will involve the integration of the computing model system,service platform system,operating system and terminal structure system,all of which involve exploration and innovation of a new networking structure,its control and management as well as way of measuring. The change in network resources triggers the change in network computing models. To let readers have a basic understanding of MUSE,this lecture introduces it in four sections. This section focuses on the development and demand analysis of the service platform. 2007ZTE Communications2007,5,2:10
2A Modified max-log-MAP Decoding Algorithm for Turbo Decoding显示文摘Turbo decoding is iterative decoding, and the MAP algorithm is optimal in terms of performance in Turbo decoding. The log MAP algorithm is the MAP executed in the logarithmic domain, so it is also optimal. Both the MAP and the log MAP algorithm are complicated for implementation. The max log MAP algorithm is derived from the log MAP with approximation, which is simply compared with the log MAP algorithm but is suboptimal in terms of performance. A modified max log MAP algorithm is presented in this paper, based on the Taylor series of logarithm and exponent. Analysis and simulation results show that the modified max log MAP algorithm outperforms the max log MAP algorithm with almost the same complexity.ZOU Xue lan, FENG Guang zeng (Mobile Communication Lab, Nanjing University of Posts and Telecommunications,Nanjing 210003, P. R. China) 2002The Journal of China Universities of Posts and Telecommunications2002,9,1:7
3A survey of next generation mobile communications researchin China显示文摘With the rapid development of wireless communication networks, the fourth generation (4G) has emerged to move beyond the limitations of the third generation (3G), with increased bandwidth, enhanced quality of services, and reduced costs of resources. In this paper, we discuss the key technologies of 4G and focus on surveying the ongoing research in 4G communications in China. The 4G technologies under investigation include multicarrier transmission, multiple antenna techniques, carrier aggregation, relays, cognitive radio, distributed antenna systems, network convergence, and network self-optimization. These technologies are the building blocks of 4G and contribute largely to the requirements of International Mobile Telecommunications Advanced (IMT-Advanced). For each technology, its benefits, research topics, and some existing approaches are examined. Finally, we briefly discuss the challenges and future research issues in 4G systems.TIAN JinFeng 1,2 , ZHENG XiaoYing 2,3 , HU HongLin 1,2 YOU XiaoHu 1,3 1 Shanghai Research Center for Wireless Communications (WiCO), Shanghai 200335, China 2 Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences (CAS), Shanghai 200050, China 3 National Mobile Communications Research Laboratory, Southeast University (SEU), Nanjing 210096, China 2011Chinese Science Bulletin2011,56,27:6
4Negacyclic codes over Galois rings of characteristic 2a显示文摘We investigate negacyclic codes over the Galois ring GR(2 a ,m) of length N = 2 k n,where n is odd and k 0.We first determine the structure of u-constacyclic codes of length n over the finite chain ring GR(2 a ,m)[u]/ u 2 k + 1 .Then using a ring isomorphism we obtain the structure of negacyclic codes over GR(2 a ,m) of length N = 2 k n (n odd) and explore the existence of self-dual negacyclic codes over GR(2 a ,m).A bound for the homogeneous distance of such negacyclic codes is also given.ZHU ShiXin 1,2,& KAI XiaoShan 1,2 1 School of Mathematics,Hefei University of Technology,Hefei 230009,China 2 National Mobile Communications Research Laboratory,Southeast University,Nanjing 210096,China 2012Science China Mathematics2012,55,4:5
5Low-complexity distributed differential spacetime coding scheme for amplify-and-forward cooperative networks显示文摘By introducing a space-time coding scheme based on amicable orthogonality, we develop a distributed differential space-time coding scheme with the amplify-and-forward (AF) method for wireless cooperative networks. The scheme requires no knowledge of the channel state information at both transmitters and receivers, and effectively decreases the realization complexity due to no channel estimation. Moreover, it has lower decoding complexity and higher coding advantage than the existing scheme, thus avoiding the shortcoming of exponential decoding complexity of some existing schemes. According to the pairwise error probability (PEP) analysis of the system, the power allocations of source and relay terminals are jointly optimized, and as a result, the PEP is minimized, which will provide a helpful guideline for system design. Numerical calculation and simulation results show that the developed scheme is superior to the existing scheme. Moreover, the scheme with optimal power allocation yields obvious performance improvement over that with equal power allocation.YU XiangBin1,2, BI GuangGuo3 & XU WeiYe4 1 College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China 2 Department of Electronic Engineering, City University of Hong Kong, Hong Kong, China 3 National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China 4 Department of Communication Engineering, Nanjing Institute of Technology, Nanjing 211167, China 2009Science in China(Series F)2009,52,8:2
6A Two-Level Spreading-despreading CDMA System and Its Performance Evaluation显示文摘A new two level spreading despreading scheme is presented in this paper. By adopting the two level scheme, the Generalized Orthogonal (GO) zone of GO codes can be utilized. In this paper, the forward link of a multi cell CDMA system employing the two level scheme is presented and analyzed. The BER performance obtained by Gaussian Approximation is compared with that of the conventional single level spreading despreading system. The results reveal that the two? level CDMA system introduced in this paper exhibits larger performance gain when time delay can be restricted within a given zone.HAO Li, FAN Ping zhi (Institute of Mobile Communications, Southwest Jiaotong University, Chengdu, 610031, P.R. China) 2003The Journal of China Universities of Posts and Telecommunications2003,10,2:2
7Primary central nervous system lympho- ma显示文摘Mobile N A Abrey L E 2007Neurol Clin2007,25,4:1
8Decoding algorithms for shortened-extended turbo product codes in WiMAX systems显示文摘The component codes of turbo product codes in WiMAX systems are extended Hamming codes and single parity check codes as well as their shortened forms. In this paper, three novel iterative decoding algorithms based on Chase, MAP algorithms and their combination are proposed for shortened-extended turbo product codes. The iterative decoding algorithm based on Chase algorithm is proposed to reduce the decoding complexity without any performance loss. An efficient MAP algorithm is then proposed to decode the component codes of shortened single parity check codes and shortened-extended Hamming codes. A comprehensive performance comparison of the proposed decoding schemes is conducted for three typical classes of turbo product codes in WiMAX OFDMA systems. The suitable decoding algorithms are recommended for different classes based on the simulation results.XU ChangLong1,3,4, YANG Wei1,2 & YE WeiChen4 1 State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100044, China 2 State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing 100044, China 3 National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China 4 Intel Corporation, Beijing Kerry Center, Guanghua Road 1, Beijing 100020, China 2009Science in China(Series F)2009,52,12:1
9Nonuniform and directional grain growth of caused by grain boundary variations显示文摘Holm E A mobility Badmos A variable Zacharopoulos N Srolovitz D J 1998Acta materlialia1998,46,3:1
10Statins attenuate high induced vascular endothelial activation: a key role for TLR4/NF-kappaB signaling path- way显示文摘Yang J Huang C Yang J mobility group box-1 protein 2010Mol Cell Biochem2010,345,:1
11ROBUSTNESS OF THE SUBSPACE METHOD FOR BLIND SIGNATURE WAVEFORM ESTIMATION WITH RESPECT TO CHANNEL ORDER IN ASYNCHRONOUS DS-CDMA SYSTEMS显示文摘The robustness of the subspace method for blind signature waveform estimation with respect to channel order is analyzed in asynchronous DS-CDMA systems theoretically. Theoretical analysis and simulation results show that the overestimating of the channel order will lead to the degradation of the quality of the estimated signature waveform. So we should adopt the channel order as small as possible.Cheng Yunpeng Cai Yueming(P. O. Box 106, Mobile Commu. Research Section, Nanjing Inst. of Commun. Eng., Nanjing, 210016) 2001Journal of Electronics(China)2001,18,3:1
12The main parameters assessment of clod and stone separation from potato crop (inclined belt type) in potato harvester 显示文摘Mosalanejad H Mobil H Poursoltan A 2011International Journal of Advanced Design and Manufacturing Technology2011,3,2:1
13Randomized controlled trial comparing traditional with two 'mobile' epidural techniques 显示文摘Comparative Obsteric Mobile Epidual Trial (COMET) Study Group 2002Anesthesiology2002,97,6:1
14Sulphate-mediated phosphorus sediments at increasing sulphate NE Germany 显示文摘Zak D Kleeberg A Hupfer M mobilization in riverine concentration River Spree (2) : 109-119 2006 2006Biogeoehemistry2006,80,:1
15Protective action of Lactobacillus kefir carrying S-Iayer protein against Salmonella enterica serovar Enteritidis显示文摘Golowczyc MA Mobil IP Garrote GL 2007International Journal of Food Microbiology2007,118,3:1
16Multimedia Radio Network显示文摘Mobile G M 1995Wireless Networks1995,1,3:1
17Phenolic Cranberry Pomace by Solidstate Bioprocessing using Food Grade Fungus Lentinus Edodes and Effect on Antimicrobial Activity against Select Food Borne Pathogens显示文摘Vattem D A Lin Y T Antioxidant Mobilization in Labbe R G 2004Innovative Food Science and Emerging Technologies2004,5,:1
18A Case Study of 3D Protein Structure Prediction with Genetic Algorithm and Tabu Search显示文摘This paper describes a case study of 3D protein structure prediction of six sequences from protein data bank (PDB) by genetic algorithm and tabu search (GATS), where off-lattice AB model is considered as a simplified model of protein structure. The lowest-energy values required for forming the native conformation of proteins are searched by GATS, and then the coarse structures (i.e., simplified structure) of the proteins are obtained according to the multiple angle parameters corresponding to the lowest energies. All the coarse structures form single hydrophobic cores surrounded by hydrophilic residues, which stay on the right side of the actual characteristic of protein structure. It demonstrates that this approach can predict the 3D protein structure effectively.WANG Ting1,2, ZHANG Xiaolong1, 3 1. School of Computer Science and Technology, Wuhan University of Science and Technology, Wuhan 430065, Hubei, China 2. College of Mobile Telecommunications, Chongqing University of Posts and Telecommunications, Chongqing 400065, China 3. State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, China 2011Wuhan University Journal of Natural Sciences2011,16,2:1
19New olgone aromatic treatment technology succeeds in Japan 显示文摘Exxon Mobils 2007Focus on Catalysts2007,,5:1
20Evaluation of the Faces pain Scale for use with the elderly显示文摘HER R K A MOBIL Y PR KOHOUTFJ 1998Clin J Pain1998,14,1:1
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