准永久的

词组短语

quasi-permanent

与准永久的相关的网络例句 [注：此内容来源于网络，仅供参考]

In this thesis, we focus on the theory for the interaction of molecular dipole moment with external electric field and use the numerical simulation to investigate the rotational state-selection of polar molecules in a hexapole electric field and the laser-field role of alignment or orientation for molecules based on semi-classical treatment, the detail is the numerical calculation for a quantum mechanical treatment of molecules and their interaction with the external field and a classical electrodynamical treatment for static electric field.

本文研究是在描述分子偶极矩（永久偶极矩或诱导偶极矩）和外电场相互作用的基础上，我们建立了对分子态选择和角动量取向、准直研究的半经典理论框架（即分子体系状态、能量及与外场相互作用使用量子理论描述，分子的运动轨迹使用经典电动力学描述），并利用数值计算方法对静电场和随时间变化电场作用下分子的转动态选择、取向和准直过程进行了研究。

Finally,the calibration of the reliability-based factors of the frequent value and the quasi-permanent value of live loads is conducted by the Joint Committee method through an actual design,and the indices are proved to be reasonable and the new method is proved to be feasible.

最后，依据可靠度计算的校准法，结合具体工程进行了基于目标可靠度的可变荷载频遇值系数和准永久值系数的标定，通过设计实践证明所建议的目标可靠度指标值是合理的，采用的标定新方法是可行的。

Aimed at the characteristics that design conditions of the foundation structures of offshore long-span-bridges are different from that of common bridges, the partial factors, the target reliability indices and the factors of wind load in different design fields were all analyzed. Then, three levels of target reliability indices which are 1.5, 2.0 and 2.3 respectively, and the corresponding factors of frequent value and quasi-permanent value of live loads based on JCSS model code with JC method were suggested.

针对大型跨海桥梁基础结构正常使用极限状态的设计条件不同于一般桥梁的特点，对各类不同设计领域的设计分项系数、目标可靠度指标及风荷载系数进行了分析和比较；然后以JCSS模式规范为基础，通过可靠度计算的验算点法，经过多次试算，建议了目标可靠度指标分别为1.5、2.0和2.3的三级可靠度水平及相应的可变荷载频遇值系数和准永久值系数。

The last one is to change a YBCO bulk into a superconducting quasi-permanent magnet, levitation force of a YBCO bulk with 40 mm in diameter is up to 218.3N at 5mm gap over a NdFeB guideway at 77K by this method.

第三方法是将YBCO块材变成准永久磁体，此种情况下，直径为40mm的圆柱状YBCO块材在77K温度下5mm悬浮间距时的悬浮力高达218.3N。