中国科学院机构知识库网格系统: 检索

Revisiting the Seasonal Evolution of the Indian Ocean Dipole from the Perspective of Process-Based Decomposition 期刊论文 OAI收割
JOURNAL OF OCEAN UNIVERSITY OF CHINA, 2023, 卷号: 22, 期号: 6, 页码: 1453-1463
作者: Zhang, Guangli; Fan, Hanjie; Huang, Ke; Long, Tong; Song, Wei

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收藏 | 浏览/下载：39/0 | 提交时间：2024/02/26

Indian Ocean Dipole climate feedback-response analysis method growth rate of the sea surface temperature anomaly seasonally dependent sea surface temperature anomaly water vapor feedback

Optimized design of mirror support structure to reduce surface sensitivity 期刊论文 OAI收割
OPTICAL ENGINEERING, 2020, 卷号: 59, 期号: 11, 页码: 114103-1-10
作者: Jiang, Chuan; Miao, Li; Bao, Qihong; Xie, Zongliang; Tan, Yufeng

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收藏 | 浏览/下载：33/0 | 提交时间：2021/05/11

deviation of axis surface sensitivity external response topology optimization

The aircraft autopilot design of parameters changing in a wide range (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electric Information and Control Engineering, ICEICE 2011, April 15, 2011 - April 17, 2011, Wuhan, China
Zhen D.; Yue Z.

收藏 | 浏览/下载：28/0 | 提交时间：2013/03/25

Autopilot is an important part of aircraft Under the action of the disturbance torque for the flight parameters of aircraft Changing in a wide range the range was about 16km on the basic of analyzing the typical trajectory the max height was about 5100m the trajectory of feature points were selected the deviation of lateral was about 12m taking pitch control loop for example the maximum angle of attack was about 3.6 a sub- PID autopilot was designed using classical control theory the maximum elevator deflection was less than 5 using single-mode Transient suppression method the maximum aileron deflection was less than 2 the overload due to control surface transition deflection was avoided when control parameters changing the maximum roll was less than 5 the verification was done by non-linear simulation. The result showed that: the phase margin of autopilot was greater than 30 the response of overload can accurately track the given overload instruction. An autopilot design method of aircraft of parameter changes in a wide range was provided. 2011 IEEE. the bandwidth was more than 14rad / s the settling time was less than 0.7s the maximum overshoot was 23.3%

Study of experimental design and Response Surface method for surrogate model of computational simulation (EI CONFERENCE) 会议论文 OAI收割
2nd Annual Conference on Electrical and Control Engineering, ICECE 2011, September 16, 2011 - September 18, 2011, Yichang, China
Xi R.; Jia H.; Xiao Q.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

While the high-precision simulation is widely used in science and technology Design of Experiment (DOE) based on Response Surface (RS) method can be employed in surrogate model to reduce the cost and error. In order to illustrate the relationship between parameters and response features several DOE methods and Response Surface (RS) method are studied. The author used polynomial regression and RBF neural network based on orthogonal array to build a rocket aerodynamic discipline surrogate model respectively which proved their feasibility. From the results of the test case conclusion is drawn that characteristic as well as acclimatization of DOE methods and different approximation should be considered for different issues so the factors of cost and accuracy could reach a balance synthetically. 2011 IEEE.

Research of active supporting technology based on 400mm thin mirror (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, April 26, 2010 - April 29, 2010, Dalian, China
作者:

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

Using a spherical mirror of 400mm diameter and 12mm thickness active supporting technology of thin mirror is researched. The axial support of the mirror is composed of 12 active supports and 3 fixed supports. The force actuator which is composed of displacement actuator and force sensor is installed in the active support. The mirror surface is tested by Zygo interferometer. For calibration each actuator exerts unit force alone and the surface variation is tested and taken as the response function of the actuator. The response functions of all actuators compose the stiffness matrix. Then the stiffness matrix is used by damped least square method to determine the correction force of each active support. In order to analyze the correction capability of the active supports 14 Zernike modes of the mirror surface are generated and tested respectively and 7 modes are selected for correction. Initially the RMS error of mirror surface is 1.16 I( =0.6328nm)when all actuators exert the same force. After 5 iterations the RMS error of mirror surface is reduced to 0.13 close to the original surface quality. 2010 Copyright SPIE - The International Society for Optical Engineering.

Algorithm research of target acquisition for TV tracking system based on Sliding Mode Control (EI CONFERENCE) 会议论文 OAI收割
2010 3rd International Conference on Advanced Computer Theory and Engineering, ICACTE 2010, August 20, 2010 - August 22, 2010, Chengdu, China
Wu P.; Gao H.-B.

收藏 | 浏览/下载：27/0 | 提交时间：2013/03/25

Target acquisition algorithm based on Sliding Mode Control (SMC) is proposed for TV tracking system. Target acquisition capability and performance are both improved attributing to overcoming the deficiencies of traditional linear control. In this paper sliding surface with variable coefficient and continuous control law without switching is introduced in the SMC controller design. The improved SMC shows better performance compared to basic SMC and full-field acquisition with rapid response and non-overshoot is achieved. The simulation of acquisition shows that the system can acquire a target passing through the view field of 1.53 in the width with an uniform speed of 15 /s while the whole process is in a short settling time and chattering-free and the reaching segment has no overshoot. 2010 IEEE.

Effect of the free surface on the earthquake energy: a case study of reverse faulting 期刊论文 iSwitch采集
Chinese science bulletin, 2009, 卷号: 54, 期号: 13, 页码: 2271-2278
作者: Li YanHeng; Shi BaoPing; Zhang Jian

收藏 | 浏览/下载：19/0 | 提交时间：2019/05/10

Energy partitioning Representation theorem Thrust fault Apparent stress Response of surface

Kinetic model study on enzymatic hydrolysis of cellulose using artificial neural networks 期刊论文 iSwitch采集
Chinese journal of catalysis, 2009, 卷号: 30, 期号: 4, 页码: 355-358
作者: Zhang Yu; Xu Jingliang; Yuan Zhenhong; Zhuang Xinshu; Lue Pengmei

收藏 | 浏览/下载：22/0 | 提交时间：2019/05/10

Enzymatic kinetics Enzymatic hydrolysis of cellulose Artificial neural network Response surface model Heterogeneous catalysis

Kinetic Model Study on Enzymatic Hydrolysis of Cellulose Using Artificial Neural Networks 期刊论文 OAI收割
chinese journal of catalysis, 2009, 卷号: 30, 期号: 4, 页码: 355-358
作者: Zhang Yu; Xu Jingliang; Yuan Zhenhong; Zhuang Xinshu; Lue Pengmei

收藏 | 浏览/下载：316/41 | 提交时间：2010/09/16

enzymatic kinetics enzymatic hydrolysis of cellulose artificial neural network response surface model heterogeneous catalysis

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.