查询词典 average distance

Applying whitening process and Gram-Schimdt orthogonalization and orthogonal subspace projection, an optimal transformation matrix is designed to minimize the ratio of intra-class distance to inter-class distance while imposing the constraint that different class centers after transformation are along specifically directions that are orthogonal each other.

以线性变换后样本的类内距离与类间距离之比最小作为准则函数，同时加上约束条件使变换后的样本中心沿着特定的正交方向，通过白化变换、Gram-Schimdt正交化和正交子空间投影求解约束准则函数得到最优变换矩阵。

Discussing and studying the piping feeding distance that is from outgate of decompression orifice plate of IG541 mixture gas piping extinguishing system to the farthest nozzles, gave the range of piping feeding distance that is common in use IG541 mixture gas fire extinguishing system s in engineering design.

依据《气体灭火系统设计规范》，对IG541混合气体有管网灭火系统减压孔板出口到最远喷头的管道输送距离进行探讨，提出工程设计中IG541混合气体灭火系统常用的管道输送距离范围。

Simulation results show that the proposed adaptive distance protection can effectively prevent overreach and no-response of distance protection.

仿真结果证明这种自适应距离保护方法能有效防止保护的超越和拒动。

On the principle of the parallel four link rods machanism, using two group parallel and equal distance spring slices, by a series of mechanism links, the position changes of rods and measure head on two grooves were showed by measuring meter in order to measure the change amount of two groove distance on central spindle of spinning bearing .

本文运用了机械原理中平行四杆机构原理，采用两组平行等距弹簧片组，通过一系列结构连接，使杆、管臂测头在两沟道中的位置变化，由测量仪表显示出来，从而达到测量纺杯轴承心轴上两沟间距离的变化

One parsec is defined as the distance at which a star would show a parallax displacement of 1 second of arc, a distance which proves to be approximately 3.258 light years.

一秒差距被定义为一颗恒星位移一度的距离，此距离经证实大约为3.258光年。

The distance between settled releaser and inlet of raw water is 180 cm, and the range of distance between pensile releaser and inlet of raw water is 60-90 cm. The flow of pensile releaser is 2-3 times as much as settled releaser.

较为合理的布置为：固定式释放器S与原水进水口距离为180 cm，悬挂式释放器P与原水进水口的距离在60～90 cm之间。P与S的流量比控制在2～3之间。

Euclidean distance and Hamming distance are used in verification. With full searching, experimental results show a 1 percent rate of error.

利用Euclidean distance、Hamming distance等方式来进行比对，对抽取的特徵full search的结果辨识错误率可达1 %。

The central studied content is: the studying for the C and R in the distance measurement, the study for standard deviation of distance measurement of the total station instrument, the study and calculation of illustration for the formula of periodic error of the total station instrument, the checking of horizontal angle.

主要的研究内容有：全站仪测距加乘常数的分析，全站仪测距标准偏差的研究，全站仪周期误差公式的分析及其实例计算，全站仪水平角的检定(多齿分度台法和多目标平行光管法)，一测回水平方向标准偏差计算公式的分析，一测回竖直角标准偏差的合理性分析及其实例计算。

A new way of distance measurement is introduced in this paper, it is similar to traditional measurement way, and has its origination. In the new measurement way, the rough measurement of the distance is realized by countering high frequency pulses filled in discriminable phase pulses. Discriminable phase pulses go through integral circuits, and then are sampled by Analogue Digital Converter, so the accurate measurement of the system is obtained by the sampling value.

本文提出了一种新的测距方法，该方法与常规相位测距仪比较，既有相似之处也有其创新之处，常规相位测距仪一般使用多波长测尺频率组合、差频数字测相的方法，本系统虽然也采用多波长测尺频率组合，但并不采用差频数字测相，该方法摒弃了传统的内外光路的切换方式及电路的混频，粗测采用对鉴相脉冲填充高频脉冲的办法实现，精测则利用鉴相脉冲对积分电路进行积分，然后由ADC 对积分电平进行转换，通过对ADC 的输出值的计算处理实现精测。

When described as a distance of an arc on the engagement pitch circle, it is called "Circumference Direction Backlash", when described as the shortest distance between two opposing tooth surfaces is called "Normal Line Backlash".

当描述为齿间弧度距离时，也叫做"圆周向回程间隙"。当描述为两啮合面的最短距离时，也称作"常规线性回程间隙"。

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。