查询词典 Betti

This article have two parts: G-fixed ideals and some ideas with stable Betti numbers on shifting operations.

中文摘要：本文分两部分：G-不变理想与移位运算下保持分次Betti数不变的一些理想。

A new integral equation method based on Betti theorem is presenied in this paper for analysing arch dams.

本文利用Betti定理提出一种分析拱坝应力的新方法──积分方程法。

Mike's another good friend,Betti was so excited to tell him that there were two guys out back throwing up and a guy upstairs was shaving.

迈克的另外一个朋友贝蒂非常激动的告诉他，有两个朋友已经在后院开始呕吐了，有一个朋友还在楼上刮胡子呢。

It is reviewed the applications of Betti base and its derivatives as chiral ligands in asymmetric synthesis, chiral auxiliary synthesis and resolution.

本文综述了近年来Betti碱及其衍生物在不对称合成、手性辅助合成以及拆分中的应用，并对未来Betti碱及其衍生物的应用作了展望。

In the Chapter One, we found the reason that led the decomposition of Betti Base 1 in the process of chiral resolution and an efficient resolution procedure was developed using acetone as the solvent.

我们发现了外消旋Betti碱1在拆分中发生分解的原因，并开发出一条以丙酮为拆分溶剂的拆分方法，经过对各种条件的优化，在以50克的拆分规模上，Betti碱1的拆分化学收率达到84％，光学收率达到99％ee。

The thesis here described the chiral resolution of Betti Base and the synthesis of their derivatives, as well as their applications as chiral ligands in asymmetric synthesis.

本文选择了Betti碱及其手性衍生物为研究目标，完成了Betti碱的拆分、手性配体结构的合成，以及它们在催化不对称合成中的初步应用。第一章主要解决了Betti碱1的拆分问题。

Betti and Hirsch also have their individual understanding respectively.

解释学哲学学派林立，有关&理解&的认识观点纷呈、百家争鸣。

Using the independence number and the girth, the upper bound of the Betti deficiency is obtained. A better lower bound on the maximum genus of a graph is obtained and a previous result is improved.

利用图的独立数和围长，得到了一个Betti亏数的上界，进而得到了最大亏格的一个比较好的下界，改进了黄元秋先前的一个结果。

On the foundation of Betti s theorem,the constitutive relation of multi-crack rockmass which considers the effect of crack-closure is developed in this paper.

本文从贝蒂定理出发，考虑裂隙在压剪应力作用下的闭合效应，推导出有序多裂隙岩体的本构方程，同时采用数学弹性力学的方法，精确推导出传压系数的理论公式，并对传剪系数加以分析。

The stress intensity factors defined in terms of the integral are derived from the Betti's reciprocal work theorem and expressed in terms of relative quantities on a path and semi-weight function.

由功能互等定理导出用半权函数和积分围道裂纹尖端的参考场所表示的所研究情况的应力强度因子的表达式。

The changes of the HAF after liver injury may be related to the volume of blood loss, the intraabdominal pressure and the pneumoperitoneum duration.

肝撞击伤伴失血后肝动脉血流量的变化与失血量、气腹压力以及气腹持续时间等有密切联系。

Reneging on our commitments to the world's poor cannot be an austerity measure, she said.

放弃我们给世界上的穷国的承诺不能成为一种紧缩措施。