In some subtle way , which physicists still do not completely understand , quantum mechanics conceals its strange effects when many particles interact in a disordered manner or when temperature rises much above absolute zero ? that is , whenever things get a little bit complicated , as they usually do in the macroscopic world 当事情变得复杂时（巨观的世界里常是如此） ，例如许多粒子不规则地交互作用，或是温度比绝对零度高出很多的时候，量子力学的奇特效应，会经由物理学家至今仍未彻底了解的某种奇妙方式，变得隐而不显。
The elastic constants of bcc li , na and fcc al crystals have been evaluated as functions of pressure and temperature by using a new model together with ab initio electronic structure and total - energy calculations . in the model it is considered that the elastic constants of crystals at a given temperature and pressure can be calculated using a conventional density functional method but modified by a new set lattice constants due to the isobaric volumetric thermal expansion when temperature rise from absolute zero to the given one 本文对高压及有限温度立方金属弹性常数的计算方法进行了研究，建立了一种考虑温度效应的物理模型，基于这个模型和从头算方法，对典型的立方晶系金属li 、 na 、 al在高压及有限温度(熔点以下温度)弹性常数进行了计算，取得了与已有实验结果较好相符的计算结果。
The verify experiment proves that its ratio and phase characteristics are much better than ordinary ones and the precision is enough for measure use . zero - flux current transformer can ’ t obtain absolute zero flux because residuary flux , so when the secondary turns is too small it will not satisfying . to improve the precision further , proposes a method to compensate zero - flux current transformer using capacitance parallel connected coil and deduces it 为了进一步抵消剩余磁通,提高互感器的精度,提出了一种并联电容线圈补偿零磁通的方法,并进行了理论推导,设计了基于该方法的100匝电流互感器,通过校验证明它可以改善零磁通电流互感器的比差和角差特性,提高互感器的精度,将电流互感器的二次匝数由普通互感器的几千匝降到了100匝,提高了测量微小电流的能力。
