中国科学院机构知识库网格系统: 检索

Solid residence time distribution in a cross-flow dense fluidized bed with baffles 期刊论文 OAI收割
CHEMICAL ENGINEERING SCIENCE, 2019, 卷号: 200, 页码: 320-335
作者: Hua, Leina; Zhao, Hu; Li, Jun; Zhu, Qingshan; Wang, Junwu

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Cross-flow dense fluidized bed Baffle Non-spherical particle Solid residence time distribution Solid dispersion coefficient Eulerian-Eulerian model

Preparation of Spherical Mordenite Zeolite Assemblies with Excellent Catalytic Performance for Dimethyl Ether Carbonylation 期刊论文 OAI收割
ACS APPLIED MATERIALS & INTERFACES, 2018, 卷号: 10, 期号: 38, 页码: 32239-32246
作者: Tian, Peng; Liu, Zhongmin; Li, Lingyun; Wang, Quanyi; Liu, Hongchao

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mordenite spherical zeolite synthesis acid distribution DME carbonylation

Non-Negative Spherical Deconvolution (NNSD) for estimation of fiber Orientation Distribution Function in single-/multi-shell diffusion MRI 期刊论文 OAI收割
NEUROIMAGE, 2014, 卷号: 101, 页码: 750-764
作者: Cheng, Jian; Deriche, Rachid; Jiang, Tianzi; Shen, Dinggang; Yap, Pew-Thian

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Spherical deconvolution Diffusion MRI Fiber Orientation Distribution Function Non-negativity constraint Spherical harmonics

估计和处理扩散磁共振成像中的总体平均扩散概率密度及其特征 学位论文 OAI收割
工学博士, 中国科学院自动化研究所: 中国科学院研究生院, 2012
作者: 程健

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扩散磁共振成像高角分辨率扩散成像球极傅立叶成像总体平均扩散密度函数方向分布函数黎曼框架标准正交基测地各向异性插值平方根参数化估计 diffusion MRI High Angular Resolution Di ﬀ usion Imaging Spherical Polar Fourier Imaging Ensemble Average Propagator Orientation Distribution Function Riemannian Framework Orthonormal Basis Geodesic Anisotropy Interpolation

Design and tolerance analysis of compensator for high order aspheric surface testing (EI CONFERENCE) 会议论文 OAI收割
2009 International Conference on Optical Instruments and Technology - Optoelectronic Measurement Technology and Systems, October 19, 2009 - October 22, 2009, Shanghai, China
作者: Chen X.; Liu W.; Chen X.; Chen X.

收藏 | 浏览/下载：28/0 | 提交时间：2013/03/25

High accuracy is required in surface testing of 90nm nodal point lithography projecting lens. By comparing various aspheric surface testing methods the structure layout of the compensator is a meniscus positive lens combined with a Plano-convex positive lens. The design results indicate that: primary and high order aberrations are balanced well we adopt Offner null compensator to test the aspheric surface in the point diffraction interferometer at last. In this paper MTF exceeds diffraction limit an Offner compensator is presented on the base of the third order aberration theory to test concave aspheric surface root-mean-square (RMS) of wave front error /167. The F-number of the system can achieve F/1.64. By the analysis of the process of aspheric surface testing with the designed system the optical construction parameters of which is determined by introducing equal-quantities spherical aberration to compensate all orders of aspheric coefficients. The field of view of the system is 0.02 a loosen distribution of the tolerance was presented based on the accuracy of measuring apparatus. 2009 SPIE.

Distribution function of dark matter with constant anisotropy 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF MODERN PHYSICS D, 2008, 卷号: 17, 期号: 8, 页码: 1283-1294
作者: Ma, Ding; He, Ping; Ma, D , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China

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收藏 | 浏览/下载：31/0 | 提交时间：2012/08/02

Spherical Stellar-systems 2-integral Distribution-functions Central Black-hole Dynamical Models Density Profiles Velocity Distributions Analytical Family Hernquist Models Galaxies Stability

Key techniques of laser direct writing of fine lines on the spherical surface (EI CONFERENCE) 会议论文 OAI收割
ICO20: Optical Design and Fabrication, August 21, 2005 - August 26, 2005, Changchun, China
Liang F.; Hu J.

收藏 | 浏览/下载：21/0 | 提交时间：2013/03/25

The main principles of laser direct writing (LDW) system for lines on the spherical surface (SS) are discussed. It is pointed out that line profile is determined by the exposure dose distribution which lies on the light intensity distribution of focus plane and the scanning speed. To improve the quality of line profile on the SS several key techniques as follows are introduced. Firstly the unique system configuration four axes mutually intersecting at the center of the SS is adopted which ensures the shape of the focus be maintained circular during the writing period. Secondly an automatic focus system (AFS) with the function of automatic focus in a certain range is introduced. Thirdly to guarantee the linear velocity to accord with the exposure character of the photoresist all the time an efficient arithmetic that controls motors run at appropriate angular velocity in different latitude is developed. Finally to achieve a stable and well-behaved system so as to compensate the velocity instability resulting from unavoidable errors of mechanical and electronics factor a powerful programmable multi-axis controller (PMAC) is utilized as the kernel element of the servocontrol system and the curves of step response and parabolic response achieved by feedforward and PID loop tuning indicate that the location precision and velocity stability have reached a high level. The experimental results of LDW of lines on the SS work piece with a diameter 30 mm and a radius equal to 100 mm are given. The section analysis of the lines on the photoresist by the atomic force microscope (AFM) after exposure and development is performed. The results show that line width is about 3.0 m and the steep sides of the lines are parallel to each other.

The t statistic of the skew elliptical distributions 期刊论文 OAI收割
JOURNAL OF STATISTICAL PLANNING AND INFERENCE, 2005, 卷号: 134, 期号: 1, 页码: 140-157
作者: Fang, BQ

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normal distribution spherical distribution t distribution dependence skewness

The skew elliptical distributions and their quadratic forms 期刊论文 OAI收割
JOURNAL OF MULTIVARIATE ANALYSIS, 2003, 卷号: 87, 期号: 2, 页码: 298-314
作者: Fang, BQ

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收藏 | 浏览/下载：19/0 | 提交时间：2018/07/30

normal distribution spherical distribution skewness moment generating function Fisher-Cochran Theorem

A multivariate version of Ghosh's T-3-plot to detect non-multinormality 期刊论文 OAI收割
COMPUTATIONAL STATISTICS & DATA ANALYSIS, 1998, 卷号: 28, 期号: 4, 页码: 371-386
作者: Fang, KT; Li, RZ; Liang, JJ

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收藏 | 浏览/下载：15/0 | 提交时间：2018/07/30

graphical technique invariant statistics left-spherical matrix distribution test of multi-normality spherical distribution