查询词典 measurement

The Periscope Drawtube will be bent because of the water resistance in sailing and this bend will cause the error of star measurement. Due to its especial structure, contactless measurement is the only way to measure its bend degree. First this paper introduces the method by linear array CCD based on structure and light path; Second it expatiates linear array CCD work principle and driving scheduling with example of TCD1501C and the driving circuit by CPLD. The output signal of linear array CCD includes common disturbance so the differential amplifier is needed. In order to make the signal adapt to computer processing, a threshold circuit with Schmitt characteristic and the data process following threshold are given. At last, some key problems in application are given.

潜艇潜望镜的镜筒在航行时受到水的阻力会产生弯曲变形，这种变形会造成潜艇对星体测量的误差；由于镜筒结构的特殊性，对其弯曲程度的测量只能采用非接触方法；首先从结构和光路方面介绍采用线阵CCD作为检测元件实现对镜筒弯曲程度的测量；其次以东芝公司的线阵CCD（TCD1501C）为例阐述了其工作原理及驱动时序的控制要点，并介绍了基于可编程逻辑器件的线阵CCD的驱动电路；线阵CCD输出的信号中含有共模干扰，必须采用差分放大器将其抑制；为将信号转化为适合计算机处理的数字信号，文中给出了有一定实用价值具有施密特特性的二值化处理电路及二值化后的数据处理过程；最后阐述了在实际使用中的一些关键问题。

In order to realize the dynamic measurement of shutdown resistance of initiating explosive device,the measurement circuit was designed.

在火工品性能测试中，开路电阻是研究火工品发火作用后特性的重要指标之一，是衡量产品桥丝是否熔断、作用是否完全的重要参数。

So, it is very important and necessary for Chinese commercial bank management how to deal with interest rate fluctuating acutely, study actively advanced interest rate risk measurement from overseas, while, take into account situation of Chinese commercial bank to choose appropriate interest rate risk measurement model, and establish effective interest rate risk management mechanism.

因此，如何应对利率日益波动剧烈的形势，积极学习国外先进的利率风险测度技术，并充分考虑我国商业银行的实际情况，选择适合自身的利率风险衡量模型，建立行之有效的利率风险管理机制是我国商业银行利率风险管理的当务之急。

Electroencephalography is the form of measurement most widely used among physiological measurement techniques in this area of research.

过去脑波心生学在运动心学的研究包含竞技运动与健身运动二大课题。

The main research work of this paper are focused on following areas:(1) Based on review of the theory and methods on measurements of particle fields, a new idea for obtaining particle size and velocity distribution within a spray through imaging the particle field with a laser light sheet was put forward;(2) A DPIV (Digital Particle Image Velocimetry) system, is fit for velocity measurements of low speed flows, was developed and expended to particle size distribution measurement;(3) An arithmetic for particle velocity field reconstruction was developed, and the velocity distribution of water mist was also obtained;(4) A software system for particle analysis, which based on image geometry emend, de-noise and image partition was developed, the parameters such as particle size distribution, mean diameter, number of particles, minimum and maximum diameter can be got with this system;(5) A water mist system was developed and its characteristics, such as droplet velocity, size distribution, number of droplets and spray cone angle under different conditions were obtained from experiments with PIVS;(6) The measurement results of water mist characteristics with PIVS were compared and analyzed with the simply simulated results, and in addition, in order to verify the accuracy of PIVS, some experiments were conducted with the standard particles, such as glass-ball with known mean diameter of 50μm and 115μm, metallic coated tracing particle with mean diameter of 12μm;(7) Some experimental studies on interaction of water mist with liquid pool fires were conducted.

本论文的主要工作包括以下几个方面：（1）在对粒子场测量的相关理论和具体方法进行综述分析的基础上，提出了通过采用激光片光对粒子场进行成像以获取其粒径和速度等参数分布的新思路；（2）研制了适宜于低速流动速度场测量的DPIV(Digital Particle Image Velocimetry)系统，并使其实现了对粒子场粒径分布的测量功能；（3）研制了基于粒子运动轨迹的速度场重建算法，获取了细水雾雾场的速度分布；（4）研制了基于几何校正、去噪、图象分割等图象处理方法的"粒度分析软件系统"，该系统既可分析给出粒子场的粒径分布直方图和平均粒径，还可给出粒子的数目以及最大、最小粒径等信息；（5）建立了一细水雾发生系统，并应用上述方法对不同压力条件下细水雾系统的雾场特性（如速度分布、雾滴粒径分布、雾滴的数目、喷雾张角以及雾化长度等）进行了实验测量研究；（6）对细水雾特性参数的PIVS测量结果与计算机简单模拟计算结果进行了定性比较分析，并利用平均粒径为50μm和115μm的玻璃球以及12μm的标准示踪粒子对PIVS系统的粒径和速度测量结果进行了实验验证，同时对其局限性进行了分析讨论；（7）对不同工况条件下细水雾与油池火相互作用的过程进行了模拟实验研究。

Measurement of noise emitted by machines; Airborne noise measurement, enveloping surface method; Woodworking machines; Special specifications for final trimming machines and edge lipping and banding machines

机器噪声测量。空气载声测量。包面法。木工机床。精切边机胶合加工机床的特殊规定

A state estimation algorithm based on Y-matrix is proposed. The method of equivalent current measurement transformation is adopted in power system state estimation for different types of measurement in transmission and distribution systems.

提出一种基于导纳矩阵方程的状态估计方法，针对输电系统和配电系统不同的量测类型，采用等效电流量测变换技术进行电力系统状态估计。

This method is derived from the equivalent current measurement transformation of practical measurements from the measuring system and changing corresponding weight coefficient of measurement according to the theory of error propagation.

中文摘要：针对输电系统和配电系统量测类型多样性及传统状态估计算法的不足，讨论并发展了一种基于等效电流量测变换的状态估计及坏数据检测与辨识方法。

The mean of measurement error of wide band sound level trends to 3 dB for single hydrophone and to 0 dB for vertical array measurement.

海上实验测量单频信号声源级的结果与数值计算的起伏一致，海试中垂直阵获得较高的空间增益。

Measurement process is a special process, to monitor and control the variation of measurement process, we have to use a special method to decompose the measuring error and its distribution law from the measured data.

测量过程是一种特殊的过程，欲像一般过程一样对其进行统计监控，必须首先研究如何从测量数据中分离测量波动规律问题。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。