Disentangling Race: Re-Narrating Apartheid Sport?

Abstract

This paper involves a search for interracial entanglements in South African sport and considers how these experiences may be narrated. The paper comprises three sections. The first provides an overview of traditional narratives of apartheid and apartheid sport that focus on race as a perpetual marker of social division. The second section shifts attention to the gaps, blind spots, mistakes, paradoxes, ironies, anomalies, ambiguities and invisibilities in the structures of apartheid that allowed for racial encounters and entanglements. The paper concludes with a discussion about the methodological and political implications of incorporating racial entanglements into narratives of apartheid sport.     

用偏振缠绕的光子对进行量子通讯和密集编码

研究如何利用两粒子形成的EPR-Bell态传输光子的量子态,并提出依赖于两光子缠绕的密集编码实验设想。     

仿古唐三彩碎纹釉的研制

介绍了在ＳｉＯ２－ＰｂＯ－Ｆｅ２Ｏ３红色彩绘料基础上，根据 α坯＜α釉且差值 α＞４．０×１０－６１／ｋ的原则，通过添加热膨胀系数大的熔剂原料来增大坯釉不适应性，使釉面产生均匀分布的网状裂纹制成了一种视觉效果良好的唐三彩碎纹釉，同时对其碎纹机理作了初步探讨。     

Entanglement of two-level atoms''''quantum states in a strong thermal radiation field

The two-level atom is described by Pauli sign and environment is described by infinite harmonic particle thermal reservoir.We have studied the entanglement of two-level atoms which are put in the strongly thermal radiation field.The two-level atoms' reducible density rectangular array is obtained.We discuss the properties of entanglement by virtue of concurrence.It is shown that the two two-level atoms initially situated in different coherent superposition states,entanglement of atoms have obvious dissimilarity.     

An inverse quasi-static steady-state thermal stresses in a thick circular plate

The present paper deals with the determination of unknown temperature and thermal stresses on the upper surface of a thick circular plate. A thick circular plate is subjected to arbitrary known interior temperature under steady state. The fixed circular edge and lower surface of the circular plate are thermally insulated. The governing heat conduction equation has been solved by using Hankel transform methods. The results are obtained in series form in terms of Bessel's functions. The results for displacement and stresses have been computed numerically and illustrated graphically.     

量子态的对称性与多体纠缠分类

通过对量子态对称性的要求,本文提供了对N-量子比特多体纠缠态的一种可能分类。对称基可以被建立起来,通过两个整体特征：周期结构和循环单元,对称基底态可以分为若干类。并与相变现象类比,重新建立了对纠缠态等价性质的理解：不等价的纠缠态对应不同的相,他们之间的转变必然伴随相变现象。除此之外,包含不同相的量子态被归为对称破缺相。     

Study of Thermal Conductivity of Hydrogen-argon Mixture at Different Temperatures for Thermal Insulation Pipes in Petroleum Industry

In this paper, through the study of thermal conductivity of hydrogen- argon mixture at different temperatures for thermal insulation pipes in petroleum industry, a good method for determining the therm...     

塔里木北缘前寒武基底隆升剥露史：来自磷灰石裂变径迹的证据

库鲁克塔格隆起位于塔里木盆地北缘，广泛出露前寒武基底岩石。辛格尔村附近出露的太古宙杂岩，包括灰色片麻岩、角闪岩、片岩、混合岩和大理岩。新元古代地层出露在库鲁克塔格隆起西部的兴地、西山口、辛格尔和杀马山附近，不整合在古元古代和中元古代的片麻岩、角闪岩和片岩之上，并被早古生代的地层不整合。因此，该地区是了解塔里木盆地前寒武基底热演化史的理想地区。本研究的目的是为了探索：①塔里木基底岩石最初于何时剥露于地表？②塔里木基底剥露以后是否经历过再次埋藏和剥露？③塔里木基底岩石构造热演化过程对大陆边缘不同构造事件的响应。为了获取塔里木北缘剥露史和冷却过程信息，我们开展了裂变经迹的研究。含磷灰石的样品采自库鲁克塔格隆起的兴地断裂两侧。样品池年龄介于146．0±13．4和67．6±6．7Ma之间，平均经迹长度介于．11．79±0．14和13．89±0．27μm之间。根据样品年龄和样品所处的构造位置，样品可以分为3组。A组样品包括F2、F3、F4、F5和F8，裂变经迹表观年龄约100～110Ma，通常位于未遭断层变形的地区。B组样品包括F7、D和F10，裂变经迹表观年龄小于80Ma，构造上位于断层上盘并靠近断层。c组样品F11具有最大的裂变经迹表观年龄146．0±13．4Ma。热模拟表明，库鲁克塔格地区的隆升剥露作用可以划分为四期，分别是早侏罗世晚期（180Ma）、晚侏罗世-早白垩世（144～118Ma）、晚白垩世早期（94～82Ma）和新生代晚期（约10Ma）。裂变经迹记录的库鲁克塔格多阶段隆升作用，是对亚洲南缘多期地体碰撞增生的响应。     

东北和华北地区上地幔成分和热状态对比及对中国东部岩石圈减薄的启示

地幔成分与其上覆地壳年龄存在相关关系,年龄越老,地幔越亏损玄武质组分.本文对产于东北和华北地区的尖晶石相橄榄岩包体的成分进行了统计分析,结果显示东北地区橄榄岩包体比华北地区包体更亏损玄武质组分.这说明东北岩石圈地幔比华北上地幔更难熔,但其上覆地壳年龄却远小于华北地区地壳的年龄.这种地壳年龄和地幔组分之间的解耦暗示东北和华北地区的岩石圈地幔形成之后发生了大规模的改造.华北地区的壳幔解耦与中生代岩石圈减薄和增生有关,而东北地区的壳幔解耦则是该区地壳的多期改造和中生代岩石圈减薄和增生等过程综合作用的结果.两地区地幔成分的差异显然与部分熔融程度的不同有关,但影响部分熔融程度的因素很多,目前尚不能确定.包体的平衡温度统计和地温线对比显示东北岩石圈的地温梯度低于华北的地温梯度,可能是东北地区岩石圈减薄的时间要早于华北地区,或者华北岩石圈减薄程度可能大于东北地区的结果,因此中国东部岩石圈减薄存在时空不均一性.     

分子振动纠缠的李代数方法

用代数理论研究对称三原子分子振动纠缠的方法,推导得到了度量纠缠的线性熵和冯诺伊曼熵并举例计算了不同初态下两纠缠熵随时间的变化规律．