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Chinese Academy of Sciences Institutional Repositories Grid
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CAS IR Grid
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长春光学精密机械与物... [3]
寒区旱区环境与工程研... [1]
武汉植物园 [1]
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How essential of the balance between large and small scale features to reproduce precipitation during a sudden sharp turn from drought to flood
期刊论文
iSwitch采集
CLIMATE DYNAMICS, 2019, 卷号: 52, 期号: 7-8, 页码: 5013-5029
作者:
Ma, Yuanyuan
;
Yang, Yi
;
Wang, Chenghai
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浏览/下载:60/0
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提交时间:2019/10/08
Sudden turn from drought to flood
Conventional continuous simulation
Grid nudging
Spectral nudging
Re-initialization
Modelling field scale spatial variation in water run-off, soil moisture, N(2)0 emissions and herbage biomass of a grazed pasture using the SPACSYS model
期刊论文
OAI收割
GEODERMA, 2018, 卷号: 315, 页码: 49-58
作者:
Liu, Yi
;
Li, Yuefen
;
Harris, Paul
;
Cardenas, Laura M.
;
Dunn, Robert M.
|
收藏
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浏览/下载:80/0
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提交时间:2018/12/29
North Wyke Farm Platform
Spatial heterogeneity
Grid-to-grid simulation
A strong coupled CFD-CSD method on computational aeroelastity (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
Xi R.
;
Jia H.
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浏览/下载:67/0
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提交时间:2013/03/25
In this paper
a strong coupled CFD-CSD method is developed to simulate the aeroelastic phenomena. The CFD solver is based on the finite-volume algorithm for the Navier-Stokes equations on unstructured grid. The CSD solver solves the aeroelastic governing equations in the modal space. Their coupling is realized by a dual-time method. The spring-based smoothing method is adopted to deform and regenerate the aerodynamic grid. Two test cases are selected to validate the authors' method for static and dynamic aeroelastity .The results of the simulation for the static aeroelastic problems of a missile wing show that the Lift Coefficient and Drag Coefficient are severally 7% and 5% lower than those don't consider the elasticity of the wing. The results for the flutter boundary prediction of the AGARD 445.6 wing have been proved much closer to the experiment than using the DLM. This method can describe the effects of fluid viscosity more exactly for highly nonlinear transonic flight conditions. The calculation has proved reliable in the subsonic regime
but not accurate enough in the supersonic regime. 2011 IEEE.
Research on the effect of clamp on rudder lift-drag characteristics (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
Zhang N.
;
Yang C.
;
Jia H.
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浏览/下载:28/0
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提交时间:2013/03/25
The paper introduce structured grid division
use CFD numerical simulation and FLUNET software to conduct the simulation calculation for flow field of high-speed vehicle
which study the clamps of high-speed vehicle control helms how to affect the lift-drag characteristics of it. To better illustrate the problem
we use the canard configuration vehicle that efficiency of control is higher. This paper calculate lift-drag characteristics of outer surface of canard helm that with or without clamps in the condition of subsonic transonic and supersonic
then compare the lift-drag characteristics of in different conditions and analyze from the perspective of flow field. 2011 IEEE.
Influence of spatial temperature distribution on high accuracy interferometric metrology (EI CONFERENCE)
会议论文
OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China
作者:
Yang H.
;
Zhang J.
;
Zhang J.
;
Zhang J.
;
Yan F.
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浏览/下载:27/0
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提交时间:2013/03/25
We calculate the influence of temperature change on the refractive index of air
establish a model of air temperature distribution and analyze the effect of different temperature distribution on the high accuracy interferometric metrology. First
a revised Edlen formula is employed to acquire the relation between temperature and refractive index of air
followed by introducing the fixed temperature gradient distribution among the spatial grid within the optical cavity between the reference flat and the test flat of the Fizeau interferometer
accompanied by a temperature change random function within each grid. Finally
all the rays through the air layer with different incident angles are traced by Matlab program in order to obtain the final output position
angle and OPD for each ray. The influence of different temperature distribution and the length of the optical cavity in on the testing accuracy can be analyzed through the RMS value that results from repeatable rays tracing. As a result
the horizontal distribution (vertical to optical axis) has a large effect on the testing accuracy. Thus
to realize the high accuracy figure metrology
the horizontal distribution of temperature must be rigorously controlled as well as to shorten the length of the optical cavity to a large extent. The results from our simulation are of great significant for the accuracy analysis of interferometric testing and the research of manufacturing a interferometer. 2010 Copyright SPIE - The International Society for Optical Engineering.
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