搜索结果: 1-15 共查到“理学 ball”相关记录34条 . 查询时间(0.05 秒)
As anyone who has ever unwound a string of holiday lights or detangled a lock of snarled hair knows, undoing a knot of fibers takes a lot longer than tangling it up in the first place.
Professors' super waterproof surfaces cause water to bounce like a ball
Professors' super waterproof surfaces water to bounce like a ball
2014/6/19
In a basement lab on BYU’s campus, mechanical engineering professor Julie Crockett analyzes water as it bounces like a ball and rolls down a ramp.
This phenomenon occurs because Crockett and her coll...
英国皇家学会会士John Ball爵士做客数学系名师讲坛（图）
英国皇家学会 会士John Ball爵士 数学系 名师讲坛
2012/11/26
应数学系副系主任李亚纯教授的邀请，2012年10月29日下午,英国牛津大学数学研究所John Ball教授以“What can mathematics say about liquid crystals？”为题，在闵行校区数学楼大会议室为数百名交大学子带来了一场精彩的学术报告，全场座无虚席。数学系党总支书记王亚光教授、副系主任李红泽教授、黄建国教授出席了本次论坛。
Axino dark matter and baryon number asymmetry from Q-ball decay in gauge mediation
Axino dark matter baryon number asymmetry Q-ball decay gauge mediation
2012/2/21
We investigate the Q-ball decay into the axino dark matter in the gauge-mediated supersymmetry breaking. In our scenario, the Q ball decays mainly into nucleons and partially into axinos to account fo...
基于包络理论与拓扑映射的方法对四次带参Ball曲线进行了形状分析,得出了曲线上含有奇点,拐点和曲线为局部凸或全局凸的充分必要条件,这些条件完全由控制多边形和形状参数所决定;并进一步讨论了形状参数对形状分布图的影响及其对曲线形状的调节能力.研究表明.四次带参B all曲线的形状调神能力要优于四次带参Bézier曲线.
Some remarks on the action of Luzin area operator on Bergman spaces of the unit ball
Lusin area operator Bergmanmetric ball Bergman spaces sampling sequences
2011/9/19
Abstract: We study the action of Luzin area operator on BErgman classes on the unit ball,providing some direct generalizations of recent results of Z.Wu.
Integration of Constraint Equations in Problems of a Disc and a Ball Rolling on a Horizontal Plane
Integration of Constraint Equations Disc Ball Rolling Horizontal Plane Dynamical Systems
2011/10/9
Abstract: The problem of a disc and a ball rolling on a horizontal plane without slipping is considered. Differential constrained equations are shown to be integrated when the trajectory of the point ...
Gravitino dark matter and baryon asymmetry from Q-ball decay in gauge mediation
Gravitino dark matter baryon asymmetry Q-ball decay gauge mediation
2011/10/18
We investigate the Q-ball decay in the gauge-mediated SUSY breaking. Q balls decay mainly into nucleons, and partially into gravitinos, while they are kinematically forbidden to decay into sparticles ...
Capillary floating and the billiard ball problem
floating in neutral equilibrium surface tension
2011/1/20
We establish a connection between capillary floating in neutral equilibrium and the billiard ball problem. This allows us to reduce the question of floating in neutral equilibrium at any orientation w...
Analysis of the new Crystal Ball data on $K^-p\to\pi^0\Lambda$ reaction with beam momenta of $514\sim 750$ MeV/$c$
Analysis new Crystal Ball data reaction beam momenta
2010/12/29
The Crystal Ball Collaboration has recently reported the differential cross sections for the reaction $K^-p\rightarrow \pi^0\Lambda$ using an incident $K^-$ beam with momenta between 514 and 750 MeV/$...
Simple model of bouncing ball dynamics: displacement of the table assumed as quadratic function of time
Chaotic Dynamics (nlin.CD)
2010/11/10
Nonlinear dynamics of a bouncing ball moving in gravitational field and colliding with a moving limiter is considered. Displacement of the limiter is a quadratic function of time. Several dynamical mo...
Polynomial Approximation in Sobolev Spaces on the Unit Sphere and the Unit Ball
Polynomial Sobolev Spaces Unit Sphere Unit Ball
2010/11/18
This work is a continuation of the recent study by the authors on approximation theory over the sphere and the ball. The main results define new Sobolev spaces on these domains and study polynomial ap...
Analysis of the new Crystal Ball data on $K^-p\to\pi^0\Lambda$ reaction with beam momenta of $514\sim 750$ MeV/$c$
new Crystal Ball data on $K^-p\to\pi^0\Lambda$ reaction beam momenta $514\sim 750$ MeV/$c$
2011/1/6
The Crystal Ball Collaboration has recently reported the differential cross sections for the reaction K−p ! 0 using an incident K− beam with momenta between 514 and 750 MeV/c. We make a ...
It is shown in this short note that the conjecture on the description of the group of automorphism of the spectral ball posed by Ransford and White is false.
On the Casimir entropy for a ball in front of a plane
On the Casimir entropy ball front plane
2010/10/29
The violation of the third law of thermodynamics for metals described by the Drude model and for dielectrics with finite \DC conductivity is one of the most interesting problems in the field of the Ca...