中国科学院机构知识库网格系统: 检索

Inverse Electron-Demanding Diels-Alder Reactions in the Chemical Synthesis of Prenylated Indole Alkaloids Containing a Bicycle[2.2.2]diazaoctane Moiety: A Theoretical Study 期刊论文 OAI收割
CHEMISTRY-AN ASIAN JOURNAL, 2023, 卷号: 18, 期号: 7
作者: Xu,Wenqiang; Sun,Tian-Yu; Di,Yingtong; Hao,Xiaojiang; Wu,Yun-Dong

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收藏 | 浏览/下载：12/0 | 提交时间：2024/07/10

alkaloids chemical synthesis inverse-electron demanding Diels-Alder reaction reaction mechanisms theoretical study BIOMIMETIC TOTAL-SYNTHESIS CORRELATED MOLECULAR CALCULATIONS MARINE-DERIVED FUNGUS GAUSSIAN-BASIS SETS (-)-VERSICOLAMIDE B ORBITAL METHODS BREVIANAMIDE-A STEPHACIDIN-A MODEL CONCISE

An Extension to the Analytical Evaluation of the Oxygen Reduction Reaction Based On the Electrokinetics On a Rotating Ring-Disk Electrode 期刊论文 OAI收割
CHEMELECTROCHEM, 2016, 卷号: 3, 期号: 4, 页码: 622-628
Wu, Kuang-Hsu; Wang, Da-Wei; Su, Dang-Sheng

收藏 | 浏览/下载：26/0 | 提交时间：2016/08/22

analytical methods kinetics oxygen reduction reaction rotating ring-disk electrode theoretical chemistry

Numerical simulations for adaptive optics system (EI CONFERENCE) 会议论文 OAI收割
31st Chinese Control Conference, CCC 2012, July 25, 2012 - July 27, 2012, Hefei, China
作者: Wang X.-J.

收藏 | 浏览/下载：28/0 | 提交时间：2013/03/25

The simulation methods for the adaptive optics (AO) system are studied. Based on the global structure of the AO system the key principles for each module are first discussed systematically including the wave propagation principles wave-front representation coordinates transformation between the coordinates considered wave-front reconstruction algorithm and DM principles. The purpose of these discussions is to establish the theoretical foundations for the numerical simulations of the AO system. Then the simulation steps are described in detail and a series of numerical simulation results are given which validate the effectiveness of our simulation work. 2012 Chinese Assoc of Automati.

Thermal difference analysis and athermalization design of infrared optical system (EI CONFERENCE) 会议论文 OAI收割
Optical Design and Testing IV, October 18, 2010 - October 20, 2010, Beijing, China
作者: Zhang X.; Zhang X.; Zhang X.

收藏 | 浏览/下载：32/0 | 提交时间：2013/03/25

When infrared optical system works in a large temperature range the thermal effect of optical lens and optical tube will produce image plane shift and lead to imaging quality deterioration. In order to eliminate the thermal aberration the athermalization design principles of infrared optical system were introduced and some commonly used methods of thermal difference compensation were described. Proceeding from single lens the thermal difference caused by temperature changing was analyzed and the relationship between temperature and focus shift was obtained. Considering optical tube thermal expansion a set of equations to estimate the thermal difference of lens group was given. Finally an infrared optical imaging system that can work under the temperature range of -40C to 60C was design according to athermal technique in which a new mechanical passive temperature compensation was proposed. Through simulation the athermalization design could make imaging plane shift the smallest. The simulation results coincided with the theoretical formula and the design had reference value in engineering. 2010 Copyright SPIE - The International Society for Optical Engineering.

Dynamic data fixing for IR target radiation characteristics (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
Lihua C.; Juan C.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

The main methods to measure the target IR features are the following two ways: test and then measurement or theoretical and simulation calculation. The former is direct measurement so the results are more accurate but the test is costly and complicated so that it is limited in the application. Theoretical and simulation calculation are widely used in the target IR radiation calibration. Here we give the basic configuration of the calibration platform for measuring the IR radiation of the large area low temperature blackbody source and discuss the calibration flowchart and key technologies for atmospheric transmission correction. The dynamic data are analyzed in real time to determine the IR radiation features in the data fusion subsystem and the experimental results show that the calibration method is feasible and practical. 2010 IEEE.

Three-port beam splitter of a binary fused-silica grating 期刊论文 OAI收割
appl. optics, 2008, 卷号: 47, 期号: 35, 页码: 6638, 6643
Feng Jijun; 周常河; Wang Bo; 郑将军; Jia Wei; Cao Hongchao; Lv Peng

收藏 | 浏览/下载：1387/336 | 提交时间：2009/09/18

Analytical expressions Beam splitters Grating designs Grating profiles Holographic recordings Inductively coupled plasma etchings Modal methods Phase gratings Polarization independents Rigorous coupled-wave analysis Theoretical values

Three-sublattice mean-field approach for magnetoelectric coupling in multiferroics 期刊论文 OAI收割
Physical Review B, 2007, 卷号: 75, 期号: 6
Q. C. Li; J. M. Liu

收藏 | 浏览/下载：12/0 | 提交时间：2012/04/13

theoretical methods

Grating interferometry method for torsion measurement (EI CONFERENCE) 会议论文 OAI收割
ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China
作者: Liu W.

收藏 | 浏览/下载：27/0 | 提交时间：2013/03/25

Method of grating interferometry was presented for torsion angle measurement moire fringe generated by two gratings is used in a new field it breaks through moire fringe's routine application. Measurement principle is described torsion angle can be gotten by the tilt angle or the width of moire fringe. Different from moire fringe's characteristic information extracting methods in traditional measurement fields fringe-tilt method and fringe-width method were put forward to extract moire fringe's characteristic information. Fringe-tilt method is on the basis of moire fringe's tilt to acquire torsion angle uniform formula was built aiming at all positions of two gratings in the coordinates fringe-width method is on the basis of moire fringe's width to acquire torsion angle three key problems are given about fringe-width method. Thick middle and thin moire fringe were collected in experiments and processed by two methods fringe-width method's result shows that magnitude of boat torsion error is satisfied with that of theoretical precision analysis and the change rule of torsion error is also same to that of theoretical analysis the thicker fringe is the higher precision is when fringe width arrives to be 1695m the precision is 1.7" the thinner fringe is the lower precision is when fringe width arrives to be 734.7m the precision is 6.7". In addition to these the results of repeatability experiments sensibility experiments are given. In a word the measurement principle is right and the precision of fringe processing is also reliable.

Magnetoelectric coupling in ferroelectromagnets with antiferroelectric and antiferromagnetic orders 期刊论文 OAI收割
Computational Materials Science, 2004, 卷号: 30, 期号: 3-4, 页码: 389-396
J. M. Liu; K. F. Wang; Y. Wang; Q. C. Li; X. S. Gao

收藏 | 浏览/下载：20/0 | 提交时间：2012/04/14

ferroelectromagnet magnetoelectric coupling Monte-Carlo method theoretical methods crystals

Direct-method-aided phasing of MIR diffraction data from proteins 期刊论文 OAI收割
ACTA CRYSTALLOGRAPHICA SECTION A, 2002, 卷号: 58, 页码: 547
Gu, YX; Chang, WR; Jiang, T; Zheng, CD; Fan, HF

收藏 | 浏览/下载：15/0 | 提交时间：2013/09/17

SINGLE ISOMORPHOUS REPLACEMENT ANOMALOUS SCATTERING DATA COMBINING DIRECT-METHODS THEORETICAL BASIS INFORMATION RESOLUTION AMBIGUITY