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基准测量
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  reference measurement
     Method of self-contained optical horizontal reference measurement based on CCD
     基于CCD技术的自举式光学水平基准测量方法
短句来源
     A new method of optical horizontal reference measurement based on CCD sensor is presented . The designs of circuits for measuring based on 89C51 are analysed in detail.
     提出了一种以CCD器件为传感器的光学水平基准的测量方法 ,具体介绍了以单片机 89C5 1为核心处理器的水平基准测量电路的软硬件设计。
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  “基准测量”译为未确定词的双语例句
     Reference Measuring System of Fire Control Radar Based on GPS Technique
     基于GPS技术的火控雷达基准测量系统
短句来源
     On the principle of measuring kinematic errors of a moving table using two laser beams as a plane datum
     以激光束为基准测量工作台直线运动误差的原理探讨
短句来源
     In order to solve the problem existing in the measurement of the magneticfield about thewarshipsin the degaussing station,the magnetic field data of the warship standard points iscalculated from the ones of the basis points by the method of two-dimensional data interpolation.
     针对目前在消磁站对舰船进行磁场测量时,探头阵列所测磁场值不是舰船标准测量点的磁场值这一情况,讨论依据探头阵列(基准测量点)测量出来的磁场值,采用二次二维插值算法计算舰船标准测量点上的磁场值.
短句来源
     This vitrual instrument can measure the frequency of passive quartz crystal oscillator using the output 1PPS signal of GPS module as the time standard and accomplish the time synchronization and distance measurement using the GPS signals.
     该虚拟仪器以GPS接收模块输出的1PPS(秒脉冲)信号为基准,测量无源石英晶体振荡器频率,同时利用GPS信号实现了仪器的时间同步与测距功能。
短句来源
     The paper presents the hardware composition, the software function of the reference measuring system for the fire control radar, analyzes the accuracy, gives out the model of coordinate conversion and the method of the performance index evaluation for the fire control radar.
     介绍火控雷达基准测量系统的硬件组成、软件功能 ,并进行了精度分析 ,给出坐标转换模型和对火控雷达性能指标进行评估的方法
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  相似匹配句对
     Survey must have its criterion.
     测量必须有基准
短句来源
     Criterion System in the Surveying Instruments
     测量仪器中基准系统
短句来源
     Uncertainty in measurement
     测量不确定度
短句来源
     Measurement of Gravity Acceleration
     重力加速度的测量
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     The Discussion of Voltage Reference and it's Application
     电压基准
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  reference measurement
Development and evaluation of a candidate reference measurement procedure for the determination of testosterone in human serum u
      
A candidate reference measurement procedure for total testosterone in human serum involving isotope dilution (ID) coupled with liquid chromatography/tandem mass spectrometry (LC/MS/MS) has been developed and critically evaluated.
      
Evaluation of resistivity data comprises modified double mass calculations versus data from reference measurement sites, which enables detection of contamination although it influences the resistivity less than the natural seasonal variations.
      
The results exhibit very good agreement with a reference measurement performed with a fast FTIR Spectrometer.
      
These data were compared to a reference measurement (saturable detector sampling scheme); the results show that the interarrival time weighting method compares favorably with the reference measurement under the present conditions.
      
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Two-photon lasers and laser amplifiers are studied by using the rate equations. The steady solution is obtained and its stability is analysed. The time evolution of large deviation from the steady solution is studied by using computer simulation. The population inversion and the trigger input must exceed certain thresholds to operate a two-photon laser. The method for producing giant-pulse is discussed. The possibility of building a pratical two-photon laser is analysed basing on the known data. A Doppler-i'ree...

Two-photon lasers and laser amplifiers are studied by using the rate equations. The steady solution is obtained and its stability is analysed. The time evolution of large deviation from the steady solution is studied by using computer simulation. The population inversion and the trigger input must exceed certain thresholds to operate a two-photon laser. The method for producing giant-pulse is discussed. The possibility of building a pratical two-photon laser is analysed basing on the known data. A Doppler-i'ree two-photon laser needs much lower threshold but much more serious frequency matching among the atom system, cavity and the trigger input. Such a Doppler-free two-photon laser could find applications in laser spectroscopy and in the accurate metrology. Two-photon laser amplifiers distort the input waveform seriously. This distortion depends strongly on the input intensity.

用速率方程的方法研究了双光子激光器和双光子激光放大器,得到了双光子激光器的基本方程,同时研究了稳态解的稳定性问题。用计算机模拟计算了大范围偏离稳态值时的时间演化。双光子激光器必须有高于阈值的集居数反转和起动的触发脉冲。讨论了产生巨脉冲的方法。根据已知的数值指出建立双光子激光器的可能性,无多普勒加宽的双光子激光器要求低得多的阈值和苛刻得多的频率匹配,但可望在激光光谱学和基准测量中得到应用。双光子激光放大器对波形有严重的畸变,并对输入脉冲的强度存在着强烈的非线性依赖关系。

The basic principle and method of measuring the antenna excess noise temperature Tas by using the radio stars as calibration are presented in this paper. In this method, the antenna noise temperature TAN is used as a standard of calibration when the antenna points at sky. It was found that the results of measurement using this method agree with that obtained by using liquid nitrogen at low and normal ambient temperature as standard of calibration. The method has advantage of more simplicity of the measurement...

The basic principle and method of measuring the antenna excess noise temperature Tas by using the radio stars as calibration are presented in this paper. In this method, the antenna noise temperature TAN is used as a standard of calibration when the antenna points at sky. It was found that the results of measurement using this method agree with that obtained by using liquid nitrogen at low and normal ambient temperature as standard of calibration. The method has advantage of more simplicity of the measurement and equipment. The total error of antenna excess noise temperature obtained by this method could be estimated to be ±3%. The error of antenna gain measured is about±0.3 dB.

本文介绍用天线指向冷空时的天线噪声温度T_(AN)作为定标基准,并以射电源为信标,测量天线剩余噪声温度T_(as)的基本原理和方法。与用冷、热负载为定标基准测量T_(as)相比,两者测量结果基本吻合;但该方法具有测量方法简便和测量设备简单等优点。T_(as)的测量误差约为±3%。天线增益测量精度可保持在±0.3dB左右。

A measuring method of five-freedom kinematic errors of a moving table along one axis is introduced which employs two laser beams as a plane datum. A mathematical model based on the basic principles of rigid body kinematics is also given. All error computation formulas obtained are simple in form and easy to handle. This method is suitable for real-time, in-situ kinematic accuracy analysis and compensation.

提出一种以两束激光为基准测量工作台直线运动误差(五个自由度)的方法,并根据刚体运动学的基本原理导出了相应的数学模型。所获得的误差计算公式形式简单,计算方便,适用于实时、现场运动精度测量及补偿。

 
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