查询词典 statistical accuracy

A gear H62 which made in yellow brass with the same mode number m=0.34, 2mm thick and had a center hole, when the gap get C=0.5%t , and punched with compound punching die, and the dimension accuracy reached IT7, the part have a flat surface ,the verticality of tangent plane reached 89.5°, its roughness Ra magnitude are 12.5μm, height of burr are 0.10mm; and the punching part are punched with progressive die, the gap C=7%t , initial accuracy are IT11, and have an more rough surface, even can see the gap with eyes.

例如料厚t=1.5mm的H62黄铜冲裁件，选用C≤40%t单边Ⅰ类小间隙冲裁比选用C≤8%tⅢ类大间隙冲裁，冲件固定误差将加大40%～60%，精度至少降一级。

In this paper the accuracy of the precision engineering control networks (Trilateration and Triangulation), established by using modern electronic distance measuring instruments and theodolites is discussed, and the method of optimization design is proposed that is based on the theory of probability and error propagation and applying the error ellipses to analyze the position accuracy of the points.

本文论述用近代光电测距仪及经纬仪建立的精密工程控制网的精度，并提出基于概率论与误差传播理论的、用误差椭圆来分析点位精度的优化设计方法。建议的平差计算与精度评定方法以专用的计算机程序来完成。

The commercial introduction of high accuracy, phase angle calibrators several years ago focused our attention on high accuracy, easy to implement, and where possible reasonably equipment insensitive, methods of phase measurement.

高精确度的商业化推出，相位角校准。几年前，我们的注意力集中在高准确，易于实施，并在可能的情况合理的设备相区分，方法测量。

Results of both theoretical analysis and calculation examples show that these algorithms are effective, and the accuracy of algorithms relies on the expectation of nodal voltage and computation accuracy of covariances.

理论分析和算例结果表明了这些算法的有效性，算法的精确性依赖于节点电压的均值和协方差的计算精度。

This method can achieve higher accuracy with simple scheme, and can be used in the passive measurement of airplane attitude. In the simulation experiments, the accuracy of the attitude angle can be limited at 1° with the reasonable position of theodolites.

仿真试验结果显示：采取4台经纬仪的合理布站，当图像上直线斜率的提取误差最大为0.6°时，可以将姿态角的最大测量误差控制在1°左右。

Where the accuracy of construction location and distance of total station,hight measurement of total station, traverse accuracy controlled by error of closure of angle polygonometry and coordinate relative error of closure or not satisfy the requirement of construction were analysised and discussed.

主要对全站仪放样距离要求和精度、全站仪高程测量以及导线测量中方位角闭合差和坐标相对闭合差来控制导线精度能否满足施工的要求等问题进行分析和探讨，以使测量精度满足要求。

In order to design a BCT with high accuracy, a primary with larger Ampere-turn is selected to achieve the demand. However, since the primary on the BCT is fixed only one turn, the higher accuracy of current ratio cannot be achieved easily for very small current occurred on the power transformer.

然因套管型比流器其一次安匝是固定的，当遇有一次次电流甚小时，因无法增加一次匝数以提高一次安匝，故难以实现较高的准确级。

The author systematically studies the construction principle of high order accuracy difference scheme and uses third-order accuracy Godunov scheme with TVD property to solve three-dimensional viscous flow field in cascade.

为了减少网格畸变对数值解的影响，发展了一种微分方程法与代数法相结合的网格生成方法。

Data mining, known as Knowledge Discovery in Databases, is defined as the nontrivial extraction of implicit, previously unknown, and potentially useful information from a great volume of data accumulations. It uses machine learning, statistical and visualization techniques to discover and present knowledge in a form being easily comprehensible to humans. Data mining is an advanced data processing technique.

数据挖掘是在数据和数据库急剧膨胀的背景下，为解决"人们被数据淹没，但却饥饿于知识"这种困境而产生的，也是数据库技术、人工智能技术、统计技术、可视化技术等发展的结果，其目的就是从大量的、不完全的、有噪音的、模糊的数据中提取出隐含在其中的潜在有用的可信、新颖并能被人理解的信息和知识，它是一种高级的数据处理过程。

In the real life, there are a mass of statistical data.

在现实生活中，有着大量的统计数据。

The system can be widely used in belt weighing and batching process control,etc.

介绍了基于智能模糊控制的嵌入式配料系统的设计方法，对模糊PID控制过程和系统调零作了重点的讨论，同时给出了PID控制的程序流程图和系统定长调零子程序。

"I dunno," she answered,"but if you show me aroun', I'll recognize it from the lighthouse just outside the porthole."

"我不知道，"她回答说，"如果你能带我转转，我能认出来的，因为灯塔就在舷窗外。"