中国科学院机构知识库网格系统: 检索

A natural extension of Markov processes and applications to singular SDEs 期刊论文 OAI收割
ANNALES DE L INSTITUT HENRI POINCARE-PROBABILITES ET STATISTIQUES, 2020, 卷号: 56, 期号: 4, 页码: 2480-2506
作者: Beznea, Lucian; Cimpean, Iulian; Rockner, Michael

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收藏 | 浏览/下载：39/0 | 提交时间：2021/01/14

Stochastic differential equation on Hilbert spaces Stochastic PDE Martingale problem Not allowed starting point Girsanov transform Nonregular drift Dirichlet form Right process Fine topology

Point cloud surface segmentation based on volumetric eigenfunctions of the Laplace-Beltrami operator 期刊论文 OAI收割
COMPUTER AIDED GEOMETRIC DESIGN, 2019, 卷号: 71, 页码: 157-175
作者: Li, Xinge; Zhang, Yongjie Jessica; Yang, Xuyang; Xu, Haibo; Xu, Guoliang

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收藏 | 浏览/下载：66/0 | 提交时间：2020/01/10

Point cloud surface Segmentation Level set form of Laplace-Beltrami operator Volumetric eigenfunction Split Bregman iteration

Deriving backscatter reflective factors from 32-channel full-waveform LiDAR data for the estimation of leaf biochemical contents 期刊论文 OAI收割
Optics Express, 2016, 卷号: 24, 期号: 5, 页码: 4771-4785
作者: Li, Wang; Niu, Zheng; Sun, Gang; Gao, Shuai; Wu, Mingquan

收藏 | 浏览/下载：27/0 | 提交时间：2017/04/24

LEAF-AREA INDEX CROP SURFACE MODELS FORM LIDAR DATA VEGETATION INDEXES POINT CLOUDS FOREST INVENTORY AIRBORNE LIDAR USE EFFICIENCY UAV CORN

Miniaturize photoelectric stable platform (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Computer Application and System Modeling, ICCASM 2010, October 22, 2010 - October 24, 2010, Shanxi, Taiyuan, China
Xue W.-Q.; Wang Y.-Y.; Dai M.

收藏 | 浏览/下载：79/0 | 提交时间：2013/03/25

In order to reduce the size and weight of the gimbal in a traditional stable platform and correct the disadvantage in size of the payload the paper first improves the gimbal which is an important component of a stable photoelectric platform that also is an important factor in affecting the size and weight of a stability platform. In this paper a closed-form solution of 3-DOF manipulator is designed according mechanical arm design principles. This manipulator is formed by a three joint axes whose extended line is intersected at one point. A standard orthogonal coordinate system is set up for each rod in the manipulator. And then rotation transformation matrix expression is obtained. At last in this paper the manipulator arm-shaped method for solving solutions is description and also each parameter of the gimbal is calculated when the photoelectric detection devices at bottom reach the expected position. Test results show that the photoelectric stability platform with gimbal we designed is smaller lighter and simpler than that traditional. Also the packaging and size of the photoelectric will not be affected with this open structure. 2010 IEEE.

Symmetry Groups and Exact Solutions of New (4+1)-Dimensional Fokas Equation 期刊论文 OAI收割
COMMUNICATIONS IN THEORETICAL PHYSICS, 2009, 卷号: 51, 期号: 5, 页码: 876-880
作者: Yang Zheng-Zheng; Yan Zhen-Ya

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收藏 | 浏览/下载：13/0 | 提交时间：2018/07/30

Fokas equation point symmetry potential symmetry solitary wave solution reduced form

Real-time restoration for motion-blurred color images by multichannel combination processing (EI CONFERENCE) 会议论文 OAI收割
1st International Workshop on Education Technology and Computer Science, ETCS 2009, March 7, 2009 - March 8, 2009, Wuhan, Hubei, China
作者: Sun H.; Sun H.; Li S.

收藏 | 浏览/下载：46/0 | 提交时间：2013/03/25

A fast algorithm is proposed to restore the color images degraded in a deterministic way by motion- blurred by multichannel combination processing. Based on the color space conversion model the point spread functions of the image motion on each plane of YUV422 image can be achieved. The U V plane of YUV422 images are combined to form a new UV plane which has the same size as Y plane. Then the Y UV plane are packed into a two dimensional complex array which can be transformed directly by FFT and result a composite frequency spectrum. Wiener filter is applied to filter Y UV spectrums separated from the composite spectra. On Graphics Processing Unit (GPU) platform the proposed algorithm can restore a 1024x1024 24-bit motion-blurred color image in 7.95ms and the PSNR of the restored image is 27.12 which reveals a good restoration performance. 2009 IEEE.

Fast iterative schemes for nonsymmetric algebraic Riccati equations arising from transport theory 期刊论文 OAI收割
SIAM JOURNAL ON SCIENTIFIC COMPUTING, 2008, 卷号: 30, 期号: 2, 页码: 804-818
作者: Bai, Zhong-Zhi; Gao, Yong-Hua; Lu, Lin-Zhang

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收藏 | 浏览/下载：24/0 | 提交时间：2018/07/30

nonsymmetric algebraic Riccati equation fixed-point equations in vector form splitting iteration method monotone convergence

Lossless wavelet compression on medical image (EI CONFERENCE) 会议论文 OAI收割
4th International Conference on Photonics and Imaging in Biology and Medicine, September 3, 2005 - September 6, 2005, Tianjin, China
作者: Liu H.; Liu H.; Liu H.

收藏 | 浏览/下载：42/0 | 提交时间：2013/03/25

An increasing number of medical imagery is created directly in digital form. Such as Clinical image Archiving and Communication Systems (PACS). as well as telemedicine networks require the storage and transmission of this huge amount of medical image data. Efficient compression of these data is crucial. Several lossless and lossy techniques for the compression of the data have been proposed. Lossless techniques allow exact reconstruction of the original imagery while lossy techniques aim to achieve high compression ratios by allowing some acceptable degradation in the image. Lossless compression does not degrade the image thus facilitating accurate diagnosis of course at the expense of higher bit rates i.e. lower compression ratios. Various methods both for lossy (irreversible) and lossless (reversible) image compression are proposed in the literature. The recent advances in the lossy compression techniques include different methods such as vector quantization wavelet coding neural networks and fractal coding. Although these methods can achieve high compression ratios (of the order 50:1 or even more) they do not allow reconstructing exactly the original version of the input data. Lossless compression techniques permit the perfect reconstruction of the original image but the achievable compression ratios are only of the order 2:1 up to 4:1. In our paper we use a kind of lifting scheme to generate truly loss-less non-linear integer-to-integer wavelet transforms. At the same time we exploit the coding algorithm producing an embedded code has the property that the bits in the bit stream are generated in order of importance so that all the low rate codes are included at the beginning of the bit stream. Typically the encoding process stops when the target bit rate is met. Similarly the decoder can interrupt the decoding process at any point in the bil stream and still reconstruct the image. Therefore a compression scheme generating an embedded code can start sending over the network the coarser version of the image first and continues with the progressive transmission of the refinement details. Experimental results show that our method can get a perfect performance in compression ratio and reconstructive image.

The E1+/M1+ and S1+/M1+ratios of gamma N ->Delta(1232) with a point-form relativistic quantum mechanics 期刊论文 OAI收割
PHYSICS LETTERS B, 2006, 卷号: 638, 期号: 4, 页码: 333-339
作者: Dong YB(董宇兵); Dong, YB

收藏 | 浏览/下载：9/0 | 提交时间：2016/06/27

relativistic quantum mechanism point-form nucleon resonances relativistic effect

Electromagnetic transitions of low-lying nucleon resonances in point form relativistic quantum mechanics 期刊论文 OAI收割
NUCLEAR PHYSICS A, 2004, 卷号: 740, 期号: 3-4, 页码: 323-332
作者: Dong YB(董宇兵); Liu J(刘杰); Dong, YB; Liu, J

收藏 | 浏览/下载：19/0 | 提交时间：2016/06/27

relativistic quantum mechanism point form Baryon resonances