文化冲撞与艺术创新—谈黄宾虹艺术变革的启示

文章以黄宾虹先生对传统山水画的成功变革作为事例,阐述了传统文化与外域文化之间不可避免的冲撞和联系;旨在说明在当今的时代背景下,艺术创新的根基来自对传统文化的深入研究,艺术创新的动力和契机在于对外来文化的合理吸收和借鉴。     

高能重离子碰撞中的色玻璃凝聚态产生

在高能重离子碰撞中,当碰撞能量很高或者 Bjorken 变量的值很小时,强子波函数中单位转移区域的胶子密度将会变得很大而导致胶子分布出现饱和,即色玻璃凝聚态(colour glass condensate,CGC)。据此,简要综述了高能重离子碰撞中色玻璃凝聚态(colour glass condensate,CGC)的产生及其性质。     

转换惯性参考系研究碰撞中的动能损失

文章阐述动量动能及其变化量与参考系的关系,在此基础上分析为什么完全非弹性碰撞是系统动能损失最大的碰撞,提出利用参考系化简问题的实用方法。     

高能碰撞间歇现象的研究

综述了用α模型研究高能碰撞间歇现象的近况．     

Newton’s Cradle in Physics Education

Newton’s Cradle is a series of bifilar pendulums used in physics classrooms to demonstrate the rôle of the principles of conservation of momentum and kinetic energy in elastic collisions. The paper reviews the way in which textbooks use Newton’s Cradle and points out the unsatisfactory nature of these treatments in almost all cases. The literature which attempts to explain how the apparatus works is discussed and alternative strategies which make it possible to teach about the nature of models in science as well as to teach physics through use of the apparatus are suggested.     

高能核反应中核几何与参与者数的研究

文章对高能核-核碰撞中的核几何与参与者数进行了模拟研究,球形核变形时,将对参与者数和旁观者数与碰撞参数和扁率的关系产生影响。     

MAYA软件中使用MEL脚本设计粒子碰撞

目前,随着三维技术的普及与进步,MAYA软件在三维动画、影视特效中的应用越来越广泛。但是,作为MAYA软件核心技术之一的MEL脚本在国内成功运用的案例还非常有限。本论文从艺术设计人员的角度和思维方式出发,将三维动画中频繁使用的粒子碰撞效果运用MEL脚本进行设计,从而带来制作时间的缩短和成本的降低。     

离子-原子混合阱中冷Rb原子对Rb+离子的协同冷却

研究在离子-原子混合阱中冷Rb原子对Rb⁺离子的协同冷却效应。通过对与原子相互作用之后离子温度和数目的测量研究离子阱参数q_1,2对协同冷却的影响。发现在0.3≤q_1,2≤0.8时冷原子对离子具有明显的协同冷却效果。选取｜q_1,2｜=0.32,测量到离子可以从初始温度（2 010±380）K冷却至（325±35）K,寿命从7s延长至15s。这对于冷却原子离子或者分子离子,尤其是没有合适光学通道的离子将是非常有意义的。     

The relationship between physical abilities,ball-carrying and tackling among elite youth rugby league players

Abstract

This study investigated the relationship between the physical abilities of adolescent rugby league players and tackling and ball-carrying skills performed during matches, across three seasons (under-15 to under-17). The players were measured each season for acceleration (10–30 m), peak and mean speed (10–30 m), sprinting force (10–30 m), aerobic power, counter-movement jump (CMJ) height and jumping power. The matches were filmed and analysed for ball-carrying and tackling frequency per minute (successful and unsuccessful outcomes). There were strong relationships between successful carries?min^–1 and 10 m force in the under-15 (R = 0.61, P < 0.001), under-16 (R = 0.69, P < 0.001) and under-17 groups (R = 0.64, P < 0.001). There were also strong and moderate relationships between predicted vertical power and successful carries?min^–1 in the under-15 (R = 0.63, P = 0.011) and under-17 group (R = 0.40, P = 0.030), respectively. There were no relationships between carries or tackles and any other performance indicators. These findings suggest that acceleration, in accordance with gains in body mass, support ball-carrying but not tackling performance. Performance measurements, such as CMJ or aerobic power, do not support ball-carrying ability among youth rugby league players.