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detecting system     
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  检测系统
     Study on α_2 and Φ_(sp) Testing of the EEC Detecting System
     EEC检测系统α_2及Φ_(sp)测试研究
短句来源
     Fatigue Detecting System Based on TMS320DM642
     基于TMS320DM642的疲劳检测系统硬件设计
短句来源
     Enhanced fatigue detecting system based on TMS320DM642
     改进的基于TMS320DM642的疲劳检测系统
短句来源
     The DSP/BIOS Application on Radar Object Detecting System
     DSP/BIOS在雷达目标检测系统上的应用
短句来源
     Design of Liquid Level Detecting system Based on Visual C++
     基于Visual C++的液位检测系统设计与实现
短句来源
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  探测系统
     At room temperature, the energy resolution of the detecting system with 3 mm×7 mm×3 mm CdZnTe detector and charge-sensitive micro-preamplifier is 4. 38% for 59. 5 keV 241 Amγsource.
     常温下3mm×7mm×3mm的CdZnTe探测器与小尺寸电荷灵敏前置放大器探测系统对于59.5 keV的241 Amγ源,其能量分辨率可达4.38%。
短句来源
     INTENSITY CALIBRATION OF VUV SPECTROSCOPIC DETECTING SYSTEM IN THE 140~200nm REGION
     140~200nm VUV光谱辐射探测系统的强度定标
短句来源
     Aiming at the application requirement of infrared imaging detecting system,a new method for infrared image real-time transmission has been proposed based on CPCI and wishbone bus(WB),which is realized on the Virtex Ⅱ FPGA.
     针对红外成像探测系统的应用要求,基于CPCI和WB(wishbone)片上总线技术,提出了一种新的红外图像实时传输方法,并在VirtexⅡFPGA上得到了实现。
短句来源
     An analysis of range of the infrared detecting system in SBIRS-low satellites
     SBIRS-low卫星红外探测系统探测距离分析
短句来源
     TDCR counting efficiency calculation technique has been realized by using tri tube liquid scintillation detecting system,and the absolute measurement of the activity of 204 T1 has been finished.
     利用三管液闪探测系统实现TDCR计数效率计算技术,并完成204T1活度的绝对测量
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  监测系统
     Temperature and Humidity Automatically Detecting System Based on AT89C51/55
     由AT89C51/55构成的温湿度自动监测系统
短句来源
     The temperature and humidity automatically detecting system based on AT89C51/55 was designed in this paper.
     介绍以AT89C51 /55单片机为核心的主从机温湿度自动巡回监测系统;
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     Analysis of problems in flame detecting system for 660 MW unit
     660MW机组火焰监测系统存在问题分析
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     A Virtual Instrument Electromagnetic Environment Detecting System Based on the GPIB
     基于GPIB的虚拟仪器电磁环境监测系统
短句来源
     Research on the Architecture Reference Model of Multimedia Safety Monitoring and Detecting System in Coal Mine
     煤矿多媒体安全监视监测系统体系结构参考模型的研究
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  测试系统
     Pulsed Raman Spectrum Detecting System Study Via Using YAG/DYE Lasers as the Source
     以YAG/DYE激光器为光源的脉冲喇曼光谱测试系统研究
短句来源
     The detecting system of electromagnetic environment in automobile basing on VEE
     基于VEE的汽车电磁环境测试系统
短句来源
     Design and accomlish of testing system for ICT detecting system
     一种用于ICT探测系统的测试系统的设计与实现
短句来源
     A Study on Intelligent Dynamic Balance and Vibration Detecting System
     新型智能动平衡及振动测试系统的研究
短句来源
     Design of Accelerometer Measurement & Detecting System for Space Flight Based on Virtual Instrument Concept
     基于虚拟仪器概念的航天用加速度表测试系统的设计
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      detecting system
    We therefore developed the fetal QRS complex detecting system for computer use.
          
    Finally, we assess the applying feasibility of direct-patternable PZT film to micro-detecting system.
          
    Stress development of direct-patternable PZT film for applying to micro-detecting system
          
    A null detecting system for absolute measurement of infrared radiation
          
    The OGO-6 detector had very low (>amp;lt; 4%) counting rate contributions from locally produced neutrons in the detecting system and the spacecraft and from charged-particle interactions in the neutron sensor.
          
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    This article attempts to propose theoretical computing formulas for input offset voltage and common mode rejection ratio of common emitter differential amplifier, common emitter-common base differential cascode amplifier and common emitter-common grid differential cascode amplifier. It proves that Early effect plays an important role so far as input offset and common mode rejection characteristics are concerned.In the past analysis on differential amplifiers offset characteristic and common mode rejection characteristic...

    This article attempts to propose theoretical computing formulas for input offset voltage and common mode rejection ratio of common emitter differential amplifier, common emitter-common base differential cascode amplifier and common emitter-common grid differential cascode amplifier. It proves that Early effect plays an important role so far as input offset and common mode rejection characteristics are concerned.In the past analysis on differential amplifiers offset characteristic and common mode rejection characteristic have been separately dealt with as two different questions. And, in discussing offset characteristic the existance of Early effect, the essence of the matter has been neglected. However, if Early effect if analyzed as the leading factor, input offset characteristic and common mode characteristic of differential amplifier will fundamentally be unified in conception. Such an analysis will clearly show how differential amplifier circuits have been developed.The results thus obtained have led to the design of low drift operational module. The article analyzes the drift contribution to the input offset voltage from the nonideal characteristic of the following stage and gives the method to match low drift.In this operational module, open loop gain and common mode rejection ratio are no less than 120dB and offset voltage drift is no more than ?±0.5μV/℃. Hence, it can be used as high quality general purpose operational devices for automatic control and automatic detecting system.

    本文以Early效应为主导线索,分析推导了共射(CE)差分级及共射-共基(CE-CB)、共射-共栅(CE-CG)串接差分级的输入失调电压Vos与共模抑制比(CMRR)的理论计算公式。证明Early效应对输入失调特性与共模抑制特性起着重要作用。文中还分析了后随级的非理想特性对输入失调电压温漂的影响,指出了实现低漂移功能块的匹配方法。据此分析而制作的低漂移运算功能块,其开环增益与共模抑制比均不低于120dB,失调电压温漂不大于±0.5μV/℃。 这种可用分立元件组装或可与单片集成前置级混合组装的功能块,可以作为自动控制与自动检测系统的高性能通用运算元件。

    The application of the photoelectric sorting method to mineral processing has made some progress at some tungsten mines in our country.In recent years,the method has been tested for quartz veined tungsten ore in leuco granite rock body and proved successful. Different kinds of minerals have different optical properties.The photoelectric sorting way is a separating process which changes the difference of certain optical property of minerals into the difference of electronic information.This diffuse refection...

    The application of the photoelectric sorting method to mineral processing has made some progress at some tungsten mines in our country.In recent years,the method has been tested for quartz veined tungsten ore in leuco granite rock body and proved successful. Different kinds of minerals have different optical properties.The photoelectric sorting way is a separating process which changes the difference of certain optical property of minerals into the difference of electronic information.This diffuse refection method is the most widely used technique in sorting minerals.It can be subdivided into three types:monochromatic,bichromatic and polychromatic sorting methods. Generally,the selection of the processes is dependent upon the extent of the differences in minerals diffuse reflectivities. The key to use of the photoelectric sorting method lies in the conversion of the differencel in mineral optical properties into sufficient difference of electron informa- tion.The detecting system composed of light source,background,lens and light sensor can do the job,which is called the“eye”of the sorting machine.Consequently,the design of the detecting system depends on sorted minerals and should be meticulous. It is important to select the background because its signal is the basis for sorting minerals.It's especially important to select precisely the photoelectric signal of the background for minerals which are similar in colour. The adjoining rock of quartz veined tungsten ore is granite.The run-of-mine ore consists of granite,quartz and wolfram blocks.The size of the diffusely reflective photoelectric signal of granite(barren rock)is between those of wolfram block and quartz block.The colour which has nearly the same diffuse reflectivity as that of granite is selected as the background and by applying the diffuse reflection sorting method,it's possible to separate granite from quartz and wolfram block.This paper describes the basic principle and merits of the sorting process and presents some test results.The treated size fraction was-35+23mm.The run-of-mine ore was composed of ore bearing quartz vein,barren metamorphic rock and granite.The results achieved were as follows:The rejecting rate of barren rock was over 92%;the separating rate of ore bearing quartz vein in excess of 86%;the content of quartz vein in tailings below 3%.

    我国的一些钨矿采用光电分选法选矿取得了一定的成效,近年来,对产于浅色花岗岩体内的石英脉型钨矿采用光电分选法进行了尝试,获得了成功。矿石的光学性质因物料不同而异。光电分选法是将物料的某种光学性质差异转变成为电子信息差异来进行拣选的一种选别方法。选矿中,最广泛采用的是漫反射分选法。漫反射分选法又分为单色分选法、双色分选法和复色分选法三种。通常是根据物料的漫反射差异的程度,选择其中的一种。采用光电分选法的关键在于能否将物料的光学性质的差异转变成足够的电子信息差异。由光源、背景、透镜装置、光敏元件等组成的检测系统,则是完成这一功能的,它被称为光电分选设备的“眼睛”。因此,对检测系统的设计考虑,是视拣选对象而定并且是十分讲究的。背景的选择是很重要的,它的光电信号是作为选别的基准,特别是对颜色相近的物料分选,精确选定背景光电信号的强弱尤为重要。围岩属花岗岩的石英脉型钨矿,因原矿是由花岗岩、石英、块钨等组成,花岗岩(废石)的漫反射光电信号的大小,介于石英与块钨之间。选择与花岗岩漫反射率相近的颜色作背景,运用漫反射分选法,是能够将花岗岩与石英、块钨分开的。本文介绍了运用漫反射分选法选弃花岗岩的意义、基本原理及方法,并提供了一...

    我国的一些钨矿采用光电分选法选矿取得了一定的成效,近年来,对产于浅色花岗岩体内的石英脉型钨矿采用光电分选法进行了尝试,获得了成功。矿石的光学性质因物料不同而异。光电分选法是将物料的某种光学性质差异转变成为电子信息差异来进行拣选的一种选别方法。选矿中,最广泛采用的是漫反射分选法。漫反射分选法又分为单色分选法、双色分选法和复色分选法三种。通常是根据物料的漫反射差异的程度,选择其中的一种。采用光电分选法的关键在于能否将物料的光学性质的差异转变成足够的电子信息差异。由光源、背景、透镜装置、光敏元件等组成的检测系统,则是完成这一功能的,它被称为光电分选设备的“眼睛”。因此,对检测系统的设计考虑,是视拣选对象而定并且是十分讲究的。背景的选择是很重要的,它的光电信号是作为选别的基准,特别是对颜色相近的物料分选,精确选定背景光电信号的强弱尤为重要。围岩属花岗岩的石英脉型钨矿,因原矿是由花岗岩、石英、块钨等组成,花岗岩(废石)的漫反射光电信号的大小,介于石英与块钨之间。选择与花岗岩漫反射率相近的颜色作背景,运用漫反射分选法,是能够将花岗岩与石英、块钨分开的。本文介绍了运用漫反射分选法选弃花岗岩的意义、基本原理及方法,并提供了一些试验结果,入选粒级为-35+23mm,原矿由含矿的石英脉和不含矿的变质岩与花岗岩组成,选别结果是废石丢弃率92%以上,含矿石英脉选出率86%以上,尾矿中石英脉含量低于3%。

    In this paper, the resolution requirements of the image-detecting devices attached to a telescope, especially those of the electrographic cameras, and their developments in some countries as well as the question on the preferred types of devices to be developed, are discussed.For image-detecting devices designed to achieve limiting resolution in ground-based astronomical observations the seeing disk is the fundamental limiting factor, and for electro-graphic cameras using superconducting magnet even the optical...

    In this paper, the resolution requirements of the image-detecting devices attached to a telescope, especially those of the electrographic cameras, and their developments in some countries as well as the question on the preferred types of devices to be developed, are discussed.For image-detecting devices designed to achieve limiting resolution in ground-based astronomical observations the seeing disk is the fundamental limiting factor, and for electro-graphic cameras using superconducting magnet even the optical telescope itself becomes the limiting agent as well. The modulation tansfer function (MTF) of an astronomical image-detecting system, T(K), is given by the following expression T(K)=T(K)1 . T(K)2 . T(K)3 . T(K)4[1] Where T(K)1 = The MTF of astronomical seeing;T(K)2=The MTF of the telescopic optical system; T(K)3=TheMTF of electron-optical system for image-detecting devices; T(K)4=The MTF of the plate for image detecting-devices. Here it is clear that the limiting spatial frequency that can be imaged reliably by the system occurs at the lowest spatial frequency for which one of the component MTF's reaches zero. Obviously, proper matching between the limiting resolutions of various components in the image-detecting system for astronomical observations is of basic importance. Therefore, the attempt to achieve resolutions as high as possible for image detecting devices, especially the attempt to use superconducting electro-magnet focusing camera, is hardly advisable.From table 2, a comparison between electrographic cameras using roomtemperature magnet and those using superconducting, magnet shows that the former is better than the latter. We think the roomtemperature electro-magnet focusing camera may be the best one in all photo-electronic image devices for ground based astronomical observations.

    本文着重分析了光学天文观测对于望远镜终端图象接收器件,特别是电子照相器件的分辨率要求,讨论了合理选择器件研制课题的问题和国外的研制情况。

     
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