搜索结果: 1-15 共查到“知识库 理学 gap”相关记录96条 . 查询时间(0.187 秒)
Bounding duality gap for problems with separable objective
Convex function linear inequalities functions random algorithm terms
2015/8/7
We consider the problem of minimizing a sum of non-convex functions over a compact domain, subject to linear inequality and equality constraints. We consider approximate solutions obtained by solving ...
‘BRIDGING THE GAP’ BETWEEN THE INFORMATION USER AND THE INFORMATION PROVIDER
heritage recording documentation information management
2015/3/6
CIPA’s Working Group 1 main goal is to provide a forum for PHOTOGRAMMETRISTS (i.e. Information Providers)
and CONSERVATION SPECIALISTS at large (i.e. Information Users from ICOMOS, ICCROM, UNESCO and...
以聚叠氮缩水甘油醚（GAP)和六亚甲基二异氰酸酯（HDI）为原料，二月桂酸二丁基锡（T-12）为催化剂，通过溶胶凝胶法及溶液结晶法制备了RDX/GAP纳米复合含能材料。用BET法、X-射线粉末衍射、扫描电镜对其结构进行了表征，用TG/DSC分析了其热性能。结果表明，RDX/GAP纳米复合含能材料具有纳米网孔结构，与GAP干凝胶相比，其比表面积下降，平均粒径为20～50nm。RDX/GAP纳米复合含...
Unconventional Rotational Responses of Hadronic Superfluids in a Neutron Star Caused by Strong Entrainment and a Σ- Hyperon Gap
Neutron star spinning reaction model whirlpool proton vortex a charged condenser coil
2014/12/19
I show that the usual model of the rotational response of a neutron star, which predicts rotation-induced neutronic vortices and no rotation-induced protonic vortices, does not hold (i) beyond a certa...
Application of a computationally efficient method to approximate gap model results with a probabilistic approach
computationally efficient method approximate gap model results probabilistic approach
2014/12/19
To be able to simulate climate change effects on forest dynamics over the whole of Switzerland, we adapted the second-generation DGVM (dynamic global vegetation model) LPJ-GUESS (Lund–Potsdam–Jena Gen...
GAPPARD: a computationally efficient method of approximating gap-scale disturbance in vegetation models
GAPPARD computationally efficient method approximating gap-scale disturbance vegetation models
2014/12/12
Models of vegetation dynamics that are designed for application at spatial scales larger than individual forest gaps suffer from several limitations. Typically, either a population average approximati...
Filling the gap in the extragalactic census: A study at 21 cm and in the near -infrared
Galaxy The universe Optical detection The surface brightness system The Milky Way
2014/12/9
Fundamental to a complete understanding of galaxy properties, formation, and evolution is a thorough knowledge of the local galaxy population. Until we understand the nearest, most easily detectable g...
ON A CONFORMAL GAP AND FINITENESS THEOREM FOR A CLASS OF FOUR MANIFOLDS
ON A CONFORMAL GAP FINITENESS THEOREM CLASS OF FOUR MANIFOLDS
2014/4/3
In this paper we develop a bubble tree structure for a degenerating class of Riemannian metrics satisfying some global conformal bounds on compact manifolds of dimension 4. Applying the bubble tree st...
Modeling increases in snowmelt yield and desynchronization resulting from forest gap-thinning treatments in a northern mountain headwater basin
snowmelt yield desynchronization resulting mountain headwater basin
2014/4/3
A physically based model built upon extensive field observations of radiation dynamics
and snow processes in cold regions forest environments was used to investigate the impacts
of prescribed ...
Equivalencies between beta-shifts and S-gap shifts
S-gap shift fi-shift shift of finite type sofic right-resolving synchronized finite equivalence
2012/7/11
Let $ X_{\beta}$ be a sofic $ \beta $-shift for $ \beta \in (1,\,2] $?#128;Ž. ?#128;ŽWe show that there is an $ S $-gap shift $ X(S) $ such that $ X_{\beta} $ and $ X(S) $ are right-resolvin...
GAP型交联改性双基推进剂黏合剂的力学性能
应用化学 聚叠氮缩水甘油醚（GAP） 交联改性双基推进剂 力学性能 黏合剂
2014/2/28
将GAP与异氰酸酯预聚后引入双基推进剂黏合剂中，研究了固化剂种类、R值、固化催化剂二月桂酸二丁基锡(T12)的含量和增塑比对黏合剂的交联网络结构参数RNB值和力学性能的影响。结果表明，随着R值以及（T12）含量的增大，黏合剂的RNB值增大。在与NC中活性-OH交联反应时，TDI的反应活性比IPDI的高。GAP-TDI/NC/NG胶片的最大抗拉强度和断裂延伸率分别可达1.09MPa和202.12%，...
Bridging the gap between services and information (The Japan Trust Fund)
HIV and AIDS Bridging the gap
2014/3/28
Africa labours under the strain of the largest HIV epidemic in the world, with infection rates in several countries reaching above 30 per cent of the general population, disproportionately concentrate...
South Asia has one of the fastest growing infection rates for HIV/AIDS of any region in the world. Once confined to pockets of people particularly vulnerable to infection such as sex workers and...
Global Calculations of Density Waves and Gap Formation in Protoplanetary Disks using a Moving Mesh
Global Calculations Density Waves Gap Formation Protoplanetary Disks Moving Mesh
2012/2/29
We calculate the global quasi-steady state of a thin disk perturbed by a low-mass protoplanet orbiting at a fixed radius using extremely high-resolution numerical integrations of Euler's equations in ...
Charged States and Band-Gap Narrowing in Codoped ZnO Nanowires for Enhanced Photoelectrochemical Responses
Charged States Band-Gap Narrowing Codoped ZnO Nanowires Enhanced Photoelectrochemical Responses
2012/2/27
By means of first-principles calculations within the density functional theory, we study the structural and optical properties of codoped ZnO nanowires and compare them with those of the bulk and film...