查询词典 backward difference

The absurd and backward-looking notion of locating a research centre in an effete , rundown, has-been country.

把研究中心设在一个苍老、衰退、过了时的国家，纯属愚蠢，开倒车的想法。

By extrapolating backward from the ejecta, it is found that the initial time of the outburst was on 9 September (9.5±0.2 UT).

根据喷出物的运动外推出爆发的初始时刻是1996年9月9日(9.5±0.2 UT)。

Because the coupling condition of NNGFM arises from the net current continuity imposed at the volume element interfaces, the relatively complex conversion formulation for partial current continuity condition of NGFM is unnecessary when applying G. E. T., and computation time is saved. The coefficient matrix of the coupled equations is tridiagonal, so it can be solved by forward elimination and backward substitution method.

NNGFM的基准校验及在大庆200MW核供热堆(NHR-200)上的应用表明，NNGFM计算精度和速度与第三类边界条件格林函数节块法NGFM〓相当，在相同精度下速度比CITATION能快1000倍；NNGFM给出的本征值、功率分布较NNGFM误差能减少一半以上，为更精确计算工作期、卡棒当量提供了条件。

An elliptic rotating field is produced when an induction motor operates in asymmetry, this paper proposes a model of jointed motion to describe the motion of an elliptic rotating vector and states that the elliptic rotating vector is jointed with two components, the main one rotates forward at a uniform speed while the adjunctive one jointed at the topend of the main one rotates backward around the joint point at a double speed, both make the elliptic rotating vector rotate at swinging amplitude, speed and direction.

感应电机不对称运转时产生椭圆旋转磁场，本文建立了描述椭圆旋转矢量的接合运动模式，说明椭圆旋转矢量是由一个主矢量带动一个付矢量一起旋转构成的接合矢量，主矢量以匀速旋转，付矢量链接在主矢量顶端同时绕着链接点相对主矢量以二倍速反向旋转，两者共同构成的一个单向椭圆旋转矢量。

Methods By using SCL-90 and EMBU,200 excellent students and 200 backward students were questionnaire surveyed.

采用症状自评量表（SCL-90）和父母养育方式评价量表，对某高校200名优秀生和200名落后生进行问卷调查。

It is obvious that the backward condition is a big barrier of energy efficiency and heating modernization.

显然，这种落后状态是提高能源利用效率和供暖现代化的一个严重障碍。

In this paper,results of Markov chain are used under the circumstances of the automaton model which belongs to logical level of Discrete Event System to analyze the steady states and transient states of the Markov model of DES,respectively based on four conditions of discrete-time parameter and continuous-time parameter.A simpler decision rule of system ergodic property which applies both to the conditions of discrete-time parameter and continuous-time parameter is presented through an example.The transient states of DES which under the condition of continuous-time parameter are analyzed and computed based on Kolmogorov backward equation or forward equation.

利用马尔科夫链的结果，在离散事件系统逻辑层次的自动机模型基础上，对DES的Markov模型的稳态和暂态特性，分别从时间参数连续和离散的情况下，分四个情况进行了分析，通过实例对系统遍历性提出了一条更简单的且在连续和离散时间参数情况下都通用的判定规则，并利用Kolmogorov向后或向前方程，对连续时间参数DES的暂态特性进行了分析和计算。

In Chapter 3, we discuss the structured backward error and condition numbers of saddle point problem.

第三章讨论鞍点问题的结构化向后误差和条件数，给出了鞍点问题结构化向后误差的一般表达式，并用结构化条件数分析了解的敏感性。

This is done by working the Euclidean algorithm backward.

反演Euclidean算法即可，相除得到的商非常重要。

In The Return of the Native, the restless Eustacia tries to find a way out of the wild, dull, and backward rural life by marrying a man who is just back from the modern outside world.

在回归本土，多变苔试图找到一条出路野外平淡落后的农村生活的男子结婚，只是从近代对外开放。

We were cousins—his grandfather was King of Scots,and his great-grandfather was Henry VII of England.

我们是堂姐弟——他的祖父曾是苏格兰国王，他的曾祖父是英格兰的亨利二世。

I do want to help you, but I am in a quandary now!

我是想帮你，但是我现在左右为难啊！