查询词典 ab-ampere

In chapter 1,the basic theory of several computational methods including various ab initio,semiempirical and DFT methods were introduced.

第1章中我们简要介绍了用于研究分子体系的主要计算方法的理论基础，包括各种从头计算方法，半经验方法和密度泛函方法。

While conventional ab initio methods is too time-consuming to afford, because the accura...

因而有必要发展一种准确的、计算上易于实现的方法来探讨体系的结构和性质间的内在关系。

It is a package which can perform semi-experience and molecular orbital ab initio calculations.

Gaussian程序是由Pople主持的从60年代开始发展起来的能够进行半经验计算和分子轨道从头算的软件包。

I am thinking of the technical rule as to trespass ab initio, as it is called, which I attempted to explain in a recent Massachusetts case.

我所想的是所谓的&初始非法侵入&，我曾试图在一个最近的麻塞诸赛州案例中解释这项技术规则。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。