|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Multi-Strategy Dynamic Spectrum Access in Cognitive Radio Networks: Modeling, Analysis and Optimization显示文摘Dynamic spectrum access(DSA) based on cognitive radios(CR) technique is an effective approach to address the 'spectrum scarcity' issue. However, traditional CR-enabled DSA system employs only single DSA strategy, which might not be suited to the dynamic network environment. In this paper, we propose a multi-strategy DSA(MS-DSA) system, where the primary and the secondary system share spectrum resources with multiple DSA strategies simultaneously. To analyze the performance of the proposed MS-DSA system, we model it as a continuous-time Markov chain(CTMC) and derive the expressions to compute the corresponding performance metrics. Based on this, we define a utility function involving the concerns of effective throughput, interference quantity on primary users, and spectrum leasing cost. Two optimization schemes, named as spectrum allocation and false alarm probability selection, are proposed to maximize the utility function. Finally, numerical simulations are provided to validate our analysis and demonstrate that the performance can be significantly improved caused by virtues of the proposed MS-DSA system. | Yi Yang Qinyu Zhang Ye Wang Takahiro Emoto Masatake Akutagawa Shinsuke Konaka | 2019 | China Communications2019，16，3： | 9 |
| 2 | Adaptive Resources Allocation Algorithm Based on Modified PSO for Cognitive Radio System显示文摘Radio spectrum has become a rare resource due to the rapid development of wireless communication technique. Cognitive radio is one of important techniques to deal with this radio spectrum problem. But the resource allocation in cognitive radio also has its own issues, such as the flexibility of the allocation algorithm, the performance of resource allocation, and so on. In order to increase the flexibility of the allocation algorithm for cognitive radio, more and more researches are focusing on the evolutionary algorithms, such as genetic algorithm(GA), particle swarm optimization(PSO). Evolutionary algorithm can greatly improve the flexibility of the allocation algorithm for cognitive radio system in different communication scenarios, but the performances are relatively lower than the original mathematical methods. So in this paper, we proposed an adaptive resource allocation algorithm based on modified PSO for cognitive radio system to solve these problems. Modified particle swarm optimization(Modified PSO) has both genetic algorithm(GA) and particle swarm optimization(PSO)’s updating processes which makes this modified PSO overcame PSO’s own disadvantages and keep advantages. Simulation results showed our proposed algorithm has enough flexibility to meet cognitive radio systems’ requirements, and also has a better performance than original PSO. | Yi Yang Qinyu Zhang Ye Wang Takahiro Emoto Masatake Akutagawa Shinsuke Konaka | 2019 | China Communications2019，16，5： | 9 |
| 3 | Pathological factors related to lymph node metastasis of submucosally invasive gastric cancer: criteria for additional gastrectomy after endoscopic resection显示文摘 | Mototsugu Fujii Yutaro Egashira Hiroshi Akutagawa Tsukasa Nishida Toshikatsu Nitta Go Edagawa Yoshitaka Kurisu Yuro Shibayama | 2013 | Gastric Cancer2013，，4： | 3 |
| 4 | 具有自旋涨落性质的单一手性三核镍(Ⅱ)配合物(英文)显示文摘[Ni3O(TBPLA)(H2O)](ClO4)4(H2O)6 [TBPLA=(S)-1,1',1''-2,4,6-trimethylbenzene-1,3,5-triyl)-tris(methylene)-tris-(pyrrolidine-2-carboxylate)] was found to possibly display multiferroic property (the coexistence of ferroelectricity and ferromagnetism). The magnetic property of this compound was studied and no magnetic hysteresis loop was found probably due to an intrinsic fluctuation for the magnetic exchange energy. | 王国喜 李波 熊仁根 Tomoyuki Akutagawa | 2007 | 无机化学学报2007，23，11： | 2 |
| 5 | Back analysis for tunnel engineering as a modern observational method 显示文摘 | SAKURAI S AKUTAGAWA S TAKEUCHI K | 2003 | Tunnelling and Underground Space Technology2003，18，23： | 1 |
| 6 | Supramolecular Cation Assemblies of Hydrogenbonded(NH4^+/NH2NH3^+)(crown Ether)in-based Molecular Conductors and Magnets显示文摘 | AKUTAGAWA T HASEGAWA T NAKAMURA T INABE T | 2002 | J Am Chem Soc2002，124，： | 1 |
| 7 | Expression of vascular endothelial growth factor and E-cadherin in human ovarian cancer:association with ascites fluid accumulation and peritoneal dissemination in mouse ascites model显示文摘 | AKUTAGAWA N NISH1KAWA A IWASAKI M | 2002 | Jpn J Cancer Res2002，93，： | 1 |
| 8 | On spaeelike hypersurfaces with constant mean curvature in the de Sitter space显示文摘 | AKUTAGAWA K | 1996 | Math Z1996，，1： | 1 |
| 9 | Osteoopontin induces angiogenesis of murine neuroblastoma cells in mice 显示文摘 | Takahashi F Akutagawa S Fukumoto H | 2002 | Int J Cancer2002，98，5： | 1 |
| 10 | Os- teopontin induces angiogenesis of murine neuroblastoma cells in mice显示文摘 | TAKAHASHI F AKUTAGAWA S FUKUMOTO H et at | 2002 | Int J Cancer2002，98，5： | 1 |
| 11 | Expression of various matrix proteases and ets family transcriptional factors in ovarian cancer cell lines :correlation to invasive potential显示文摘 | Nshikawa A Iwasaki M Akutagawa N | 2000 | Gynecol Oncol2000，79，2： | 1 |
| 12 | Osteopontin induces angiogenesis of murine neuroblastoma cells in mice显示文摘 | Takahashi F Akutagawa S Fukumoto H | 2002 | Int J Cancer2002，98，5： | 1 |
| 13 | Coordination polymers constructed from transition metal ions and organic N-containing heterocyclic ligands:Crystal structures and microporous properties显示文摘 | Noro S Kitagawa S Akutagawa T | 2009 | Prog Poly Sci2009，34，： | 1 |
| 14 | Electron transport in a gold nanoparticle assembly structure stabilized by a physisorbed porphyrin derivative显示文摘 | Noda Y Noro S Akutagawa T | 2010 | Phys Rev B2010，82，： | 1 |
| 15 | On spacelike hypersurfaces with constant mean curvature in the de Sitter space显示文摘 | Kazuo Akutagawa | 1987 | Mathematische Zeitschrift1987，，1： | 1 |
| 16 | On space-like hypcrsurfacc with constant mean curvature in the de Sitter space显示文摘 | Akutagawa K | 1987 | Math Z1987，96，： | 1 |
| 17 | Conformational Polymorph of o-Aminoanilinium-dibenzo crown-6)Supramoleculesin -Salts显示文摘 | Akutagawa T Koshinaka H Ye Q | 2010 | Chem As J2010，5，： | 1 |
| 18 | Optimization of MLP/BP for character recognition using a modified alopex algorithm显示文摘 | Hirohito Shintani Masatake Akutagawa | 2007 | Knowledge-based and Intelligent Engineering Systems2007，，11： | 1 |
| 19 | Expression of vascular endothelial growth factor and E-cadherin in human ovarian cancer: association with ascites fluid accumulation and peritoneal dissemination in mouse ascites model 显示文摘 | Nishikawa A Iwasaki M | 2002 | JpnJ Cancer Res2002，93，6： | 1 |
| 20 | Early growth response-1 medi-ates up-regulation of telomerase in placenta显示文摘 | Akutagawa O Nishi H Kyo S | 2007 | Placenta2007，28，89： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员