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数学与系统科学研究院 [5]
长春光学精密机械与物... [2]
海洋研究所 [1]
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期刊论文 [6]
会议论文 [2]
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Global Controllability of the Navier-Stokes Equations in the Presence of Curved Boundary with No-Slip Conditions
期刊论文
OAI收割
JOURNAL OF MATHEMATICAL FLUID MECHANICS, 2022, 卷号: 24, 期号: 3, 页码: 32
作者:
Liao, Jiajiang
;
Sueur, Franck
;
Zhang, Ping
  |  
收藏
  |  
浏览/下载:21/0
  |  
提交时间:2023/02/07
Axi-symmetric Navier-Stokes equations
Controllability
No-slip Dirichlet boundary condition
Boundary layers
Return method
Multi-scales asymptotic expansion
Well-prepared dissipation method
Long-time nonlinear Cauchy-Kovalevskaya estimates
Observers and Disturbance Rejection Control for a Heat Equation
期刊论文
OAI收割
IEEE TRANSACTIONS ON AUTOMATIC CONTROL, 2020, 卷号: 65, 期号: 11, 页码: 4957-4964
作者:
Feng, Hongyinping
;
Xu, Cheng-Zhong
;
Yao, Peng-Fei
  |  
收藏
  |  
浏览/下载:34/0
  |  
提交时间:2021/01/14
Mathematical model
Observers
Heating systems
Uncertainty
Feedback control
Closed loop systems
Disturbance rejection control
heat equation
nonlinear boundary condition
observer
stabilization
A Multiscale Algorithm for Heat Conduction-Radiation Problems in Porous Materials with Quasi-Periodic Structures
期刊论文
OAI收割
COMMUNICATIONS IN COMPUTATIONAL PHYSICS, 2018, 卷号: 24, 期号: 1, 页码: 204-233
作者:
Yang, Zhiqiang
;
Sun, Yi
;
Cui, Junzhi
;
Li, Xiao
  |  
收藏
  |  
浏览/下载:35/0
  |  
提交时间:2019/03/05
Multiscale asymptotic analysis
radiation boundary condition
quasi-periodic structures
nonlinear heat transfer problems
Projective Dirichlet Boundary Condition with Applications to a Geometric Problem
期刊论文
OAI收割
ACTA MATHEMATICA SINICA-ENGLISH SERIES, 2016, 卷号: 32, 期号: 1, 页码: 11-24
作者:
Ji, Min
  |  
收藏
  |  
浏览/下载:21/0
  |  
提交时间:2018/07/30
Elliptic resonance equation
nonlinear boundary condition
convex indicatrix
mean torsion
A new application of conditional nonlinear optimal perturbation approach to boundary condition uncertainty
期刊论文
OAI收割
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 2015, 卷号: 120, 期号: 12, 页码: 7979-7996
作者:
Wang, Qiang
;
Mu, Mu
收藏
  |  
浏览/下载:16/0
  |  
提交时间:2016/05/03
conditional nonlinear optimal perturbation
uncertainties
boundary condition
deep chlorophyll maximum
Space optics remote sensor focusing components mechanics characteristic analysis based on FEM (EI CONFERENCE)
会议论文
OAI收割
International Symposium on Photoelectronic Detection and Imaging 2009: Material and Device Technology for Sensors, June 17, 2009 - June 19, 2009, Beijing, China
作者:
Wang B.
;
Ren J.-Y.
;
Wang B.
收藏
  |  
浏览/下载:147/0
  |  
提交时间:2013/03/25
Space optical remote sensor is very important in many fields of science and military significance. It is widely applied. Space optical remote sensor design and manufacturing require precision and stability. Focusing mechanics is an important component of remote sensors. Focusing mechanics can guarantee the stability of the entire mechanics focusing accuracy
therefore the stability of research focusing mechanics is very important. In order to guarantee the space optics remote sensor focusing mechanics the stability
takes steps the space optics remote sensor focusing organization mechanics characteristic analysis from the classics contact theory. This article uses international general non-linear finite element analysis software ABAQUS to carry on mechanics characteristic analysis to the space optics remote sensor focusing mechanics. First acts according to the focusing mechanics unique feature
carries on the finite element to the structural model the grid division
the material attribute disposition and the boundary condition indeed grades. Then establishment contact non-linear finite element model
and to focusing organization finite element model infliction unit action. Like this contacts the result and the equivalent static analysis result which the nonlinear analysis obtains carries on the contrast and the analysis. This article last count result modality is 90HZ
satisfies the space optics remote sensor structure overall modality to request to be bigger than 50HZ.This article when carries on the dynamic analysis
extracts the structure kinetic energy and the acceleration curve. In the dynamic analysis obtained transient response analysis modality 70.5Hz
this also is bigger than 50HZ. The dynamic analysis indicated the structure dynamic stability has the distinct enhancement
has provided certain foundation for the space optics remote sensor following development work
reduced the overall system development cycle. 2009 SPIE.
Intelligent MRTD testing for thermal imaging system using ANN (EI CONFERENCE)
会议论文
OAI收割
ICO20: Remote Sensing and Infrared Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China
Sun J.
;
Ma D.
收藏
  |  
浏览/下载:25/0
  |  
提交时间:2013/03/25
The Minimum Resolvable Temperature Difference (MRTD) is the most widely accepted figure for describing the performance of a thermal imaging system. Many models have been proposed to predict it. The MRTD testing is a psychophysical task
for which biases are unavoidable. It requires laboratory conditions such as normal air condition and a constant temperature. It also needs expensive measuring equipments and takes a considerable period of time. Especially when measuring imagers of the same type
the test is time consuming. So an automated and intelligent measurement method should be discussed. This paper adopts the concept of automated MRTD testing using boundary contour system and fuzzy ARTMAP
but uses different methods. It describes an Automated MRTD Testing procedure basing on Back-Propagation Network. Firstly
we use frame grabber to capture the 4-bar target image data. Then according to image gray scale
we segment the image to get 4-bar place and extract feature vector representing the image characteristic and human detection ability. These feature sets
along with known target visibility
are used to train the ANN (Artificial Neural Networks). Actually it is a nonlinear classification (of input dimensions) of the image series using ANN. Our task is to justify if image is resolvable or uncertainty. Then the trained ANN will emulate observer performance in determining MRTD. This method can reduce the uncertainties between observers and long time dependent factors by standardization. This paper will introduce the feature extraction algorithm
demonstrate the feasibility of the whole process and give the accuracy of MRTD measurement.
New linking theorem and elliptic systems with nonlinear boundary condition
期刊论文
OAI收割
NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS, 2003, 卷号: 52, 期号: 7, 页码: 1797-1820
作者:
Zou, WM
;
Li, SJ
  |  
收藏
  |  
浏览/下载:17/0
  |  
提交时间:2018/07/30
linking
nonlinear boundary condition
elliptic systems