中国科学院机构知识库网格系统: 检索

Supercritical and subcritical aeroelastic behaviors of a three-dimensional wing coupled with a nonlinear energy sink 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS, 2024, 卷号: 161, 页码: 17
作者: Huang CD(黄程德); Zheng GN(郑冠男); Nie XY(聂雪媛); Yang GW(杨国伟)

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收藏 | 浏览/下载：9/0 | 提交时间：2024/05/27

Flutter Nonlinear energy sink Equivalent linearization method Reduced order model

HiDeNN-TD: Reduced-order hierarchical deep learning neural networks 期刊论文 OAI收割
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, 2022, 卷号: 389, 页码: 33
作者: Zhang L(张磊); Lu, Ye; Tang, Shaoqiang; Liu, Wing Kam

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收藏 | 浏览/下载：40/0 | 提交时间：2022/02/17

Hierarchical deep-learning neural networks Proper generalized decomposition Canonical tensor decomposition Reduced order finite element method Convergence study and error bound

ORDER REDUCED METHODS FOR QUAD-CURL EQUATIONS WITH NAVIER TYPE BOUNDARY CONDITIONS 期刊论文 OAI收割
JOURNAL OF COMPUTATIONAL MATHEMATICS, 2020, 卷号: 38, 期号: 4, 页码: 565-579
作者: Zhang, Weifeng; Zhang, Shuo

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收藏 | 浏览/下载：27/0 | 提交时间：2020/05/24

Quad-curl equation Order reduced scheme Regularity analysis Finite element method

Uncertain reduced-order modeling for unsteady aerodynamics with interval parameters and its application on robust flutter boundary prediction 期刊论文 OAI收割
AEROSPACE SCIENCE AND TECHNOLOGY, 2017, 卷号: 71, 页码: 214-230
作者: Chen XJ; Qiu ZP; Wang XJ; Li YL; Wang RX(王睿星)

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收藏 | 浏览/下载：30/0 | 提交时间：2018/02/08

Uncertain Reduced-order Modeling Robust Flutter Analysis Interval Perturbation Method Uncertain Aeroelastic System

Study on a new aerodynamic model of HAWT based on panel method and Reduced Order Model using Proper Orthogonal Decomposition 期刊论文 OAI收割
RENEWABLE ENERGY, 2012, 卷号: 48, 页码: 436-447
作者: Wang, Q.; Wang, Z. X.; Song, J. J.; Xu, Y.; Xu, J. Z.

收藏 | 浏览/下载：44/0 | 提交时间：2015/11/03

Wind turbine 3D panel method Reduced Order Model (ROM) Proper Orthogonal Decomposition (POD)

Analysis on the influence of random vibration on MEMS gyro precision and error compensation (EI CONFERENCE) 会议论文 OAI收割
2011 3rd International Conference on Mechanical and Electronics Engineering, ICMEE 2011, September 23, 2011 - September 25, 2011, Hefei, China
作者: Li M.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

In order to improve its precision in dynamic environment a Kalman filter was designed. Firstly two sets of random drift data of MEMS gyro were respectively analysed and it was found that the variance of random drift under random vibration significantly increased and its mean also changed. Then calculation results show that attitude angle error under random vibration is 2.6 while in the static test it is 0.25. Analysis on the characteristics of random drift was carried out and it is found that it can be treated as stable normally distributed random signal. Finally a corresponding Kalman filter was designed. The results indicated that after filtering the variance of random drift is reduced to 0.0282 26.4% of pre-filtering and the attitude angle error is reduced to 1.5 57.7% of pre-filtering. The above method can effectively compensate for the attitude angle error of MEMS gyro caused by random vibration. This study can be a reference to the application of low-cost MEMS gyro in aircraft navigation. (2012) Trans Tech Publications Switzerland.

PID control of glucose concentration in subjects with type 1 diabetes based on a simplified model: An in silico trial (EI CONFERENCE) 会议论文 OAI收割
10th World Congress on Intelligent Control and Automation, WCICA 2012, July 6, 2012 - July 8, 2012, Beijing, China
作者: Yu L.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

An artificial pancreas system (APS) mimics the function of a real pancreas through monitoring a diabetic's blood glucose and administering the right dose of insulin via an automatic control loop. It is hailed as a promising cure of diabetes though this technology is still years away from commercial use due to a few technological bottlenecks. The simulation model of insulin-glucose metabolism of type 1 diabetes mellitus (T1DM) is an essential part of APS. In order to simplify the parameter identification task so that the model can be implemented electronically with ease this paper presents a simplified model based on Routh approximation model reduction method. The results show that the approximation error between the simplified model and the original model is so small that can be neglected. Based on the simplified model a PID controller is designed to maintain normoglycemia (90mg/dl) in subjects with T1DM. The in silico simulation results show that the glucose concentration is controlled well the risk of hyperglycemia and hypoglycemia is reduced a lot. This suggests that the simplified model describes the insulin-glucose metabolism process accurately and the PID control algorithm is well-suitable to guide the further development of an APS. 2012 IEEE.

Comparative study on order-reduced methods for linear third-order ordinary differential equations 期刊论文 OAI收割
FRONTIERS OF MATHEMATICS IN CHINA, 2012, 卷号: 7, 期号: 6, 页码: 1151-1168
作者: Ren Zhiru

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收藏 | 浏览/下载：20/0 | 提交时间：2021/01/14

PRECONDITIONED ITERATIVE METHODS SYSTEMS FLOWS third-order ordinary differential equation order-reduced method sinc discretization preconditioner Krylov subspace method

Structure optimization of strap-down inertial navigation system support (EI CONFERENCE) 会议论文 OAI收割
2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011, July 15, 2011 - July 17, 2011, Inner Mongolia, China
作者: Wang J.; Sun H.; Sun H.

收藏 | 浏览/下载：31/0 | 提交时间：2013/03/25

In order to meet the requirement of inertial navigation components and minimizing the system's weight and topological optimization was conducted. Then topological optimization and size optimization were conducted under conditions of random vibration and impact. Firstly according to the dynamic characteristics of missile and requirement of inertial navigation system the structure of inertial navigation support was designed according to types of missile connection and space arrangement of electronic components the method of transforming multi-loading cases to multi-loading constraints was used to optimizing the size of the support under conditions of random vibration and impact. Comparing to the original support structures RMS accelerations in installed points reduced by 25.2% under random vibration the weight of optimal structures reduced by 28.1% the structures also met the requirement of inertial navigation system under condition of impact. The support structure shows improvements in both dynamic characteristic and light weight comparing with the original one. 2011 IEEE.

Adaptive Wiener filtering with Gaussian fitted point spread function in image restoration (EI CONFERENCE) 会议论文 OAI收割
2011 IEEE 2nd International Conference on Software Engineering and Service Science, ICSESS 2011, July 15, 2011 - July 17, 2011, Beijing, China
作者: Yang L.; Zhang X.; Zhang X.; Zhang X.; Yang L.

收藏 | 浏览/下载：44/0 | 提交时间：2013/03/25

In the imaging process of the space remote sensing camera there was degradation phenomenon in the acquired images. In order to reduce the image blur caused by the degradation the remote sensing images were restored to give prominence to the characteristic objects in the images. First the frequency-domain notch filter was adopted to remove strip noises in the images. Then using the ground characters with the knife-edge shape in the images the point spread function of the imaging system was estimated. In order to improve the accuracy the estimated point spread function was corrected with Gaussian fitting method. Finally the images were restored using the adaptive Wiener filtering with the fitted point spread function. Experimental results of the real remote sensing images showed that almost all strip noises in the images were eliminated. After the denoised images were restored its variance and its gray mean gradient increased also its laplacian gradient increased. Restoration with Gaussian fitted point spread function is beneficial to interpreting and analyzing the remote sensing images. After restoration the blur phenomenon of the images is reduced. The characters are highlighted and the visual effect of the images is clearer. 2011 IEEE.