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浏览/检索结果: 共13条，第1-10条 帮助 已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择发表日期升序发表日期降序作者升序作者降序提交时间升序提交时间降序题名升序题名降序 钙钛矿结构光磁功能材料RFeO_3晶体制备和奇异物性（英文） 会议论文 第八届中国功能材料及其应用学术会议 作者:  曹世勋[1] 收藏  |  浏览/下载：4/0  |  提交时间：2019/04/30 钙钛矿结构  RFeO_3  功能材料  catalysis  condensed  suffer  floating  rotating  terahertz  Czochralski   钙钛矿结构光磁功能材料RFeO_3晶体制备和奇异物性（英文） 会议论文 第八届中国功能材料及其应用学术会议 作者:  曹世勋[1] 收藏  |  浏览/下载：2/0  |  提交时间：2019/04/30 钙钛矿结构  RFeO_3  功能材料  catalysis  condensed  suffer  floating  rotating  terahertz  Czochralski   钙钛矿结构光磁功能材料RFeO_3晶体制备和奇异物性（英文） 会议论文 第八届中国功能材料及其应用学术会议 作者:  曹世勋[1] 收藏  |  浏览/下载：2/0  |  提交时间：2019/04/30 钙钛矿结构  RFeO_3  功能材料  catalysis  condensed  suffer  floating  rotating  terahertz  Czochralski   钙钛矿结构光磁功能材料RFeO_3晶体制备和奇异物性（英文） 会议论文 第八届中国功能材料及其应用学术会议 作者:  曹世勋[1] 收藏  |  浏览/下载：3/0  |  提交时间：2019/04/30 钙钛矿结构  RFeO_3  功能材料  catalysis  condensed  suffer  floating  rotating  terahertz  Czochralski   Stray light analysis of solar photoelectric detection system on space target (EI CONFERENCE) 会议论文 2012 International Conference on Intelligent System and Applied Material, GSAM 2012, January 13, 2012 - January 15, 2012, Taiyuan, Shanxi, China Li L.-Y.; Wang Y.-F.; San X.-G. 收藏  |  浏览/下载：136/0  |  提交时间：2013/03/25 Most conventional spacious solar photoelectric detection systems suffer from unexpected stray light. This paper demonstrates the effects on photoelectric detection system bring out by stray light. On this foundation  build up evaluation index of stray light system  to search the reasonable programme to eliminating stray light. A detailed telescope system geometry model was created  and scatter models were create for telescope and enclosure components. By the means of designing the structure of main baffle  baffle vane and the coating technology. In order to verify the prosperity of structure that designed  we utilizes software to analysis opto-mechanical model. we utilizes software to analysis opto-mechanical model. The simulations show that point source transmittance of the system is thus reduced by up to two orders of magnitude between 10-8 and 10-10. Meanwhile  the experiment obtains clean detection data which satisfies the system requirements. Stray light has been suppressed effectually  and so measurement precision was improved from detection graphics. (2012) Trans Tech Publications.   An improved hyperspectral classification algorithm based on back-propagation neural networks (EI CONFERENCE) 会议论文 2012 2nd International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2012, June 1, 2012 - June 3, 2012, Nanjing, China Mao W.; Yu P.; Guo B.; Xu Y.; Chen H. 收藏  |  浏览/下载：20/0  |  提交时间：2013/03/25 In this paper  a new method is proposed to improve the classification performance of hyperspectral images by combining the principal component analysis (PCA)  genetic algorithm (GA)  and artificial neural networks (ANNs). First  some characteristics of the hyperspectral remotely sensed data  such as high correlation  high redundancy  etc.  are investigated. Based on the above analysis  we propose to use the principal component analysis to capture the main information existing in the hyperspectral images and reduce its dimensionality consequently. Next  we use neural networks to classify the reduced hyperspectral data. Since the back-propagation neural network we used is easy to suffer from the local minimum problem  we adopt a genetic algorithm to optimize the BP network's weights and the threshold. Experimental results show that the classification accuracy is improved and the time of calculation is reduced as well. 2012 IEEE.   A multi-layer description of subgrid-scale effects 会议论文 Ning Hu; Huan Liu; Zhensu She 收藏  |  浏览/下载：1/0  |  提交时间：2017/12/03 turbulence  coherent  anisotropy  suffer  fluctuation  Reynolds  universal  coarse  inhomogeneous  sizes  turbulence  coherent  anisotropy  suffer  fluctuation  Reynolds  universal  coarse  inhomogeneous  sizes   Cerebral metabolism in major depressive disorder:a voxel-based meta-analysis of Positron Emission Tomography studies 会议论文 作者:  Su L(苏亮);  Cai YY(蔡亦蕴);  Shi SX(施慎逊);  Anirban Dutt;  Elvira Bramon-Bosch 收藏  |  浏览/下载：6/0  |  提交时间：2019/12/19 metabolism  bilateral  ganglia  insula  gyrus  supra  corrected  compensated  suffer  prevalence   留17低渗透复杂断块油藏储量动用程度评价 期刊论文 2010, 卷号: 6, 页码: 18-23 作者:  谢爽;  董伟;  李国艳;  张兴旺;  甘霖 收藏  |  浏览/下载：1/0  |  提交时间：2019/12/04 储量动用程度  低渗透油藏  断块油藏  suffer  剩余油   Blind channel estimation of MIMO-OFDM based on FDPM (EI CONFERENCE) 会议论文 5th International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2009, September 24, 2009 - September 26, 2009, Beijing, China Gang W.; Ming Z.; Hua C. 收藏  |  浏览/下载：14/0  |  提交时间：2013/03/25 Subspace based methods have been widely discussed in multichannel estimation including MIMO-OFDM system. However  direct subspace methods suffer from heavy computation complexity y of O(N3). In this paper  a new subspace tracking technique called Fast Data Projection Method (FDPM) is proposed for adaptively tracking the noise subspace. The new algorithm has low complexity of O(NL) and is the only numerically stable  low complexity algorithm for tracking subspaces corresponding to the smallest singular values. Simulation results show that the proposed scheme has similar performance to the original. 2009 IEEE.