查询词典 measuring error

According to the problem that grating scale hardly achieves high resolution when in high speed and the characteristic of high speed high precision system,this paper presents across dimension displacement measuring method based on dual grating scales dual measuring,the counting values of dual grating scales switch and merge.

在分析光栅线性位移测量原理、光栅尺的测量误差尤其是细分误差的基础上，本文重点研究双光栅尺切换与合成的原理，建立了基于双光栅尺高速高精度位移测量的设计准则，根据设计准则设计了切换基准拾取方法以及快速切换与合成方法，分析了双光栅计数值切换合成的误差。

In order to study the intake air flow characteristics in four-valve diesel engines, in this dissertation hot-wire anemometer and PIV twodimension instantaneous measuring technique are used. Extensive experimental study on two intake valve exit flow fields and longitudinal section flow field in cylinder are performed for different type of diesel engines. Great researching progress have been made on the interaction between two intake ports, and the formation process of in-cylinder swirl and flow field structure of cross and longitudinal section for four valve diesel engines. These results are presented in China for the first time and without such kind of research work reported abroad as detailed and deepgoing as this dissertation. The author designs and makes a set of hot wire measuring velocity device to measure the velocity distribution around the intake valve annulus and the cross section flow field in cylinder.

为了研究四气门柴油机进气过程中气体流动的变化规律，本文利用热线测速和PIV二维瞬态测速技术，对四气门柴油机两进气门出口全圆周流速场和缸内横、纵剖面的气体流动流场进行了大量的试验研究，在四气门柴油机两进气道之间相互影响的变化规律，缸内涡流的形成过程及缸内横、纵剖面流场结构等方面取得了重大的研究进展，这一研究工作在国内尚属首次，在国外也未见有如此全面、深入的研究报道。

Experiment results indicate that the laser speckle method is effective, its measuring value is about 14% less than the measuring value of dial gauge.

结果表明，激光散斑法用于测定闭合断续节理岩体的位移场效果良好，其测值比对应点千分表测值偏小14％左右。

Distribution of the Company's products are known to domestic and foreign manufacturers of products, such as Chengdu Blades Measuring Tool Works, shanghai measuring and cutting tools works, days vary, Henan abrasive abrasive plant, pigeons Shabu, Hohhot global licensing Chuck, Zhuzhou Carbide plant licensing diamond cutter head, and other alloys.

本公司经销的产品都以享誉国内外的厂家生产的产品为主，如成都量具刃具厂，上海量具刃具厂，天异，河南磨料磨具厂，白鸽砂布，呼和浩特的环球牌卡盘，株州硬质合金厂的钻石牌合金刀头等。

Besides of measuring common pressure,stainless steel diaphragm seal pressure gauge can measure the low pressure of 1.6～40KPa and vacuum.Stainless steel diaphragm seal pressure gauge with flange connector can be used for measuring the media,in which granule and deposit exist.

不锈钢膜片压力表除测常规压力外，可测量 1.6～40KPa范围的微压和负压，对于含有颗粒状介质以及必须防止被测介质中沉淀物积累的场合，可采用法兰型不锈钢膜片表。

Aimed at the problem of impulse interference of voltage and leakage current influence the dielectric loss measuring accuracy,an algorithm for dielectric loss measuring was proposed.

针对介损测量用的电压和泄漏电流信号存在脉冲干扰影响介损测量准确性的问题，提出了使用中值滤波算法对信号进行滤波，然后对滤波后信号使用数字化算法计算介损的算法。

The efficiency of measuring cam in the past is so low that four hours are needed tomeasuring a cam using optical dividing head. So the methods of measuring cam in thepast are not adaptable for the high efficiency of modernized industry.

传统的凸轮检测方法智能化程度和效率都很低，用光学分度头检测一个凸轮需要约四个小时，不适应现代化生产高效率要求。

Is a production, sales agent service companies, Main Products and Services: constant temperature and humidity box; walk-in constant temperature and humidity room; salt spray test chamber; temperature shock test chamber; simulation of motor transport Test Units; Vibration Test Units; Units drop test; tensile testing machine; sclerometer; combustion test machine; electrical appliances and machine attachment test equipment; wire and cable and cable test equipment; microscopy; digital projector; image measuring instrument; coordinate measuring machine; voltage tester; Oscilloscopes; program-controlled variable frequency power supply; EMC instruments

惠尔仪器公司是一家集生产、代理销售为一体的服务性公司，主营产品和服务：恒温恒湿箱；步入式恒温恒湿室；盐雾试验箱；温度冲击试验箱；模拟汽车运输试验台；振动试验台；跌落试验台；拉力试验机；硬度计；燃烧试验机；电器产品附件及整机试验设备；电线电缆及连接线试验设备；显微镜；数字式投影仪；影像测量仪；三座标测量机；耐压测试仪；示波器；程控变频电源；EMC仪器等

The problem of measuring flow rate and mass dryness fraction in the same time during thermal recovery of heavy oil is solved by combining orifice plate with uniform velocity tube and on line measuring double parameters of two phase flow of steam and water.

利用孔板与均速管组合在线测量汽—水两相流双参数，解决了稠油热采中同时测量蒸汽流量与干度的难题。

Of precision electric measuring system,analyzing at length the effects of earth wire,electric field noise and magnetic field noise on the measuring results.

详细分析了接地线、电场噪声、磁场噪声对测量结果的影响，并提出解决问题的办法和保护措施。

I can not negligent, he should do what?

我不能不在意了，他要做什么呢？

It is very dangerous to swim in the river alone.

一个人到河里游泳是很危险的。