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LIGO-Virgo finds mystery object in gap between neutron stars and black holes（图）
LIGO-Virgo mystery object gap between neutro holes
2020/7/3
When the most massive stars die, they collapse under their own gravity and leave behind black holes. When stars that are a bit less massive die, they explode in supernovas and leave behind dense, dead...
If they’re quick about it, “hot” electrons excited in a plasmonic metal can tunnel their way across a nanoscale gap to a neighboring metal. Rice University scientists said the cool part is what happen...
Male students in undergraduate introductory biology courses are outperforming females at test time, but it may be due to how exams are designed rather than academic ability. In addition, high-socioeco...
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 ...
A revolutionary biochemistry textbook designed for the needs of students in allied health professions has been produced following collaboration between The University of Queensland (UQ) and The Univer...
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%，...