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浏览/检索结果: 共4条，第1-4条 帮助 限定条件 内容类型：会议论文     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 The scene classification method based on difference vector in DCT domain 会议论文 Lanzhou, China, August 2, 2016 - August 5, 2016 作者:  Li, Ce;  Li, Ming;  Xiao, Limei;  Ren, Beijie 收藏  |  浏览/下载：3/0  |  提交时间：2020/11/15 Classification (of information)  Computation theory  Database systems  Intelligent computing  Matrix algebra  Support vector machines  Compressed domain  Cross validation  DCT coefficients  Difference vectors  Energy concentration  Hot research topics  Multiresolution characteristics  Scene classification   The Scene Classification Method Based on Difference Vector in DCT Domain 会议论文 作者:  Li, Ce;  Li, Ming;  Xiao, Limei;  Ren, Beijie 收藏  |  浏览/下载：0/0  |  提交时间：2019/11/15 Scene classification  DCT  Difference vectors  Multi-resolution  Compressed domain   Numerical simulation about trapping two particles in microfluidic dielectrophoretic chip 会议论文 2012 2nd International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale, 3M-NANO 2012, Xi'an, China, August 29, 2012 - September 1, 2012 作者:  Chen LG;  Li SQ;  Cui HH(崔海航);  Zheng X(郑旭) 收藏  |  浏览/下载：11/0  |  提交时间：2017/06/20 DEP  Dielectrophoretic chip  Different sizes  Flow channels  Microfluidic chip  Particle trapping  Two particles   Rigorous vector analysis of diffractive microlens by using of finitedifference time-domain method (EI CONFERENCE) 会议论文 2009 International Conference on Optical Instruments and Technology, OIT 2009, October 19, 2009 - October 22, 2009, Shanghai, China Liu Y.; Liu H. 收藏  |  浏览/下载：19/0  |  提交时间：2013/03/25 We use finite difference time domain (FDFD) method as rigorous vector analysis model to simulate the focusing process of diffractive microlens (DML). Differing with most analysis model which the near field distributions are calculated by FDTD and then far field are obtained by using of propagation method  we obtain the fields in whole computational space by using of FDTD only. The advantages are that all the results are vector based and the computational time is saved greatly. In this paper  we present two methods to obtain wave amplitude  one is comparison method  and the other is integral method. Depending on wave amplitude in the whole computational space  one can conveniently obtain distributions of electric field intensity and calculate the time-average Poynting vector. We also present the formulation for calculating diffractive efficiency of DML based on time-average Poynting vector which denotes energy flow. As demonstration  a DML is analyzed by using of these algorithms. The time depended graphic results of FDTD show the process of wave propagation. The distribution of electric field intensity illustrates the focusing of the normal incident light. The focus pattern in the focal plane is also show. The diffractive efficiency of the DML is calculated by using of the energy flow method in this paper. The results show the high accuracy and efficiency of the model. 2009 SPIE.