查询词典 be at a distance from

This article first introduced the development distance learning system goal and the significance, and have analyzed the basic function which the distance learning system should have.

本文首先介绍了开发远程教育系统的目的和意义，并分析了远程教育系统所应具备的基本功能。

The fold distance of the heuristic function was used instead of its direct distance.

将启发函数中的直线距离替换为折距，对其进行了改进。

And in order to get the model data, it used the distance matrix to denote the distance of each district.

为了求解此规划模型中的数据，将各个小区之间的距离表示为距离矩阵，然后以Matlab为平台利用Floyd算法求出小区之间的最短临接矩阵。

The distance matrix S and the topological index of distance matrix W~* were redefined in this paper.

重新定义了距离矩阵及距离矩阵拓扑指数W~*，该定义考虑分子中每一原子的性质和成键情况以及分子中每一原子与所有其它原子的结合情况。

For example, while length is an abstract measure of distance, the meter is a concrete base unit of distance.

例如，长度是距离的一个抽象的度量，而米是距离的一个具体的基础单位。

Subtract the distance at the first time from the distance at the second time (d2 - d1). Divide by the amount of time it took you to blow up the balloon.

令第二次测的距离减去第一次测的距离，即d2 - d1，用吹气球的时间去除。

The results show that non-sequential double ionization rate and the double ionization events that sum of two-electron momentum equals zero increase with the molecular internuclear distance increasing when the molecular internuclear distance is within 1.0a.u.

结果表明，分子核间距在1.0a.u。-6.0a.u。范围内时，非时序双电离率和两电子动量和为零的双电离事件数随着分子核间距的增大而增大。

The spring constants of the cantilever were calibrated according to the Cleveland method,and the conversion from the original data to the force-distance or force/radius-distance curves was obtained with satisfactory results referring to the Ducker\'s classical paper.

采用Cleveland方法对悬臂的弹性常数进行了标(来源：Aecb4BCb4论文网www.abclunwen.com)定，将原始的力-位移曲线数据转化为力-距离曲线或力/半径-距离曲线，并将实验结果与Ducker经典论文进行了对照。

First scanning the known handwriting materials then number them ,In pretreatment, we convert the valid part of the image into a standard size, as images carries out duotone and go throw off chirp handling in order to achieve better effect.draw features from the known handwriting materials with the Co-occurence,especially,we divided a copy of handwriting into 25 little pieces with the size of 128*128 ,drawing features from every little piecese with four directions(0 degree, 45 degrees, 90 degrees as well as 135 degrees) and calculate the four major feature values( veins and the statistical quantity of veins contrast and the statistical quantity of veins consistency Shang the statistical quantity of statistical quantity as well as the veins correlation of gray scale ), preservation all the feature value that drawn from all known ma terials to the handwriting characteristic database,then input the unknown handwriting materials, also using the method of the Co-occurence to draw those features, recycling the minimum European Distance law match the unknown writing material feature value with the handwriting characteristic feature database, export the label of the known hand writing materials which is most similar to the unknown material with minimum European Distance, and then we can confirm who is the author of the unknown material.

首先将笔迹材料作为图象扫描输入，并对其进行编号。预处理部分可将笔迹图象的有效部分规范化到一个统一尺寸，接着对其进行二值化和去除噪声的处理，以便于更好的提取图像的特征。在此我们采用了灰度共生矩阵法提取手写笔迹材料的纹理特征，与以往有所不同的是，我们将一份手写材料分割成64块大小为80*80象素的子图象，每个小块都从四个方向（0度、45度、90度以及135度）来更全面的提取特征，并计算出四个最主要的特征值（纹理一致性的统计量、纹理反差的统计量、纹理熵的统计量以及纹理灰度相关性的统计量），将从所有已知材料提取的特征值保存到纹理特征库中，对于待检手写材料，同样采用灰度共生矩阵的方法提取其纹理特征，再利用最小欧氏距离分类法将从待检手写材料中提取的特征值与纹理特征库中的特征值进行比对，与欧氏距离比对值最小的相匹配，输出匹配成功的原材料的标号，进而识别出待检材料书写者的身份。

The basic principle is based on spherical astronomy and elementary geometry of the trajectory mapping method based on the observation of a celestial body zenith distance, then the ship is located in order to sing the next point as the center of this satellite zenith distance of the ship's position as the radius of the circle, observing the same two objects, or objects at different times of the two observations, we can get two ship's position round, then the ship must have been a point of intersection of two ship's position on the circle.

其基本原理是建立在球面天文学和初等几何中的轨迹作图法基础上的，观测一个天体的天顶距，则航船就位于以星下点为圆心，此星天顶距为半径的船位圆上，观测两个天体或者不同时间同一天体的两个观测值，就可以得到两个船位圆，则航船一定在两个船位圆的一个交点上。

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。