中国科学院机构知识库网格系统: 检索

Gaussian limit for determinantal point processes with J-Hermitian kernels 期刊论文 OAI收割
SCIENCE CHINA-MATHEMATICS, 2022, 页码: 16
作者: Lin, Zhaofeng; Qiu, Yanqi; Wang, Kai

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收藏 | 浏览/下载：23/0 | 提交时间：2023/02/07

determinantal point process J-Hermitian kernel linear statistics central limit theorem translation-invariant kernel

On interpolating anomalous dimension of twist-two operators with general spins 期刊论文 OAI收割
JOURNAL OF HIGH ENERGY PHYSICS, 2019, 期号: 7, 页码: 86
作者: Banerjee, Aritra; Chowdhury, Abhishek; Thakur, Somyadip; Yang, Gang

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收藏 | 浏览/下载：21/0 | 提交时间：2020/06/16

LARGE-N LIMIT N=4 SYM WILSON OPERATORS NON-RENORMALIZATION PRODUCT EXPANSION 4-POINT FUNCTIONS ASYMPTOTICS QCD OPE

Stability Analysis of Prescribed Slip Surfaces Based on a Combination of the Equilibrium Equation and the Critical Unstable Condition 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF GEOMECHANICS, 2017, 卷号: 17, 期号: 12, 页码: -
作者: Shi, Lu; Bai, Bing; Li, Xiaochun

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收藏 | 浏览/下载：28/0 | 提交时间：2018/06/05

Slope stability Factor of safety Limit equilibrium method Critical unstable point Critical unstable condition Strength-reduction method

Data normalization of single camera visual measurement network system (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Information Technology and Management Innovation, ICITMI 2012, November 10, 2012 - November 11, 2012, Guangzhou, China
作者: Zhang Y.-C.; Zhou J.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

With the development of visual measurement system Normalize the measured coordinates into the same world coordinate system Apply in the three coordinate measuring machine(CMM) to have the simulation experiment So the data normalization has the advantage of more high precision. (2013) Trans Tech Publications the visual measurement system of single camera which applied in the imaging theory of optical feature points then get the global data the result indicates that the maximum absolute tolerance between the normalization coordinates via the center of point set and the ones measured by CMM directly is 0.058mm Switzerland. it has been widespread used in the modern production. Due to the limit of the environment in scene and achieve the overall measurement the visual measurement system of single camera could not measure the shield between the measured objects each other. Focus on this problem But the one between the coordinate repeatedly measured at the position of one network control point is 0.066mm present a kind of the the knowledge of measurement network based on the visual measurement of single camera set up the measurement network system via the multi-control points. Measure the optical feature points in every network control point via the visual measurement system of single camera

Design of heliostats field for the scale of 1MW solar power tower plant (EI CONFERENCE) 会议论文 OAI收割
2012 Asia-Pacific Power and Energy Engineering Conference, APPEEC 2012, March 27, 2012 - March 29, 2012, Shanghai, China
作者: Zhang H.; Wang Z.; Wang Z.; Zhang H.

收藏 | 浏览/下载：37/0 | 提交时间：2013/03/25

The development in basic technology and market strategy of solar thermal power techniques is booming rapidly due to the limited fossil resources and severe environmental problems all over the world. In this paper the design method of heliostats field for the scale of 1MW solar power tower plant with latitude of 40.4N at the design point of the noon of spring equinox is introduced which uses the multiplication of three efficiencies of cosine atmospheric transmittance and intercept as the preliminary boundary limit to locate heliostats while the spacing between heliostats is set not only for less shading and blocking but also for the availability of installation and maintenance of heliostats. Furthermore its optical performance tested by the software HFLD is quite good which has annual average efficiency of 71.36% and design point efficiency of 80%. 2012 IEEE.

Numerical Limit Equilibrium Method of Three-Dimensional Stability for 期刊论文 OAI收割
Advanced Materials Research, 2011, 卷号: 250-253, 页码: 3927-3933
作者: Wei Zhong; Xiaoqing Chen; Tao Yang

收藏 | 浏览/下载：19/0 | 提交时间：2016/12/21

Landslide Numerical Limit Equilibrium Method Point Safety Factor Sliding Mechanism

Mechanism of STED microscopy and analysis of the factors affecting resolution (EI CONFERENCE) 会议论文 OAI收割
6th International Symposium on Precision Engineering Measurements and Instrumentation, August 8, 2010 - August 11, 2010, Hangzhou, China
Yang P.; Ai H.

收藏 | 浏览/下载：31/0 | 提交时间：2013/03/25

Stimulated emission depletion (STED) microscopy exploits nonlinear saturable optical transition of fluorescent molecules allowed to overcome Abbe's diffraction-limit and provides diffraction-unlimited resolution in far-field optical microscopy. We elaborate the mechanism of STED and the conditions of depletion. The formula of STED microcopy resolution is deduced through effective point spread function (E-PSF). The STED system resolution is mainly dominated by the quality of the fluorescence depletion patterns in the focal plane. The depletion pattern is mainly affected by STED beam intensity polarization phase plate primary aberrations STED pulse shape pulse duration and delay time. In this paper we found related models and simulate the relationship between the depletion patterns and the parameters and put forward effective approach to enhance the system resolution. 2010 SPIE.

The analysis for the reason of limit cycle generated by friction in servo system (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
作者: Li M.

收藏 | 浏览/下载：23/0 | 提交时间：2013/03/25

In this paper limit cycle which results from friction during low-velocity servo system has been discussed. First the piecewise linearization method has been applied to change nonlinear stribeck model to linear model. Second with analysis of equilibrium property it is proved the existence of limit cycle and its certain region. The analysis reveals that it is because of stability of equilibrium repeatedly changing results in the limit cycle during low-velocity state. In addition it also points that the key point to avoid this phenomenon is to keep robust stability of the close-loop system. 2010 IEEE.

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：31/0 | 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.

Melting of metals: role of concentration and migration of vacancies at surfaces 期刊论文 OAI收割
Philosophical Magazine Letters, 2008, 卷号: 88, 期号: 3, 页码: 203-211
Q. S. Mei; K. Lu

收藏 | 浏览/下载：17/0 | 提交时间：2012/04/13

kinetic stability limit crystals au(110) al(110) point al