查询词典 accuracy of measurement

By using the Cholesky factorization and inverse method for unit lower triangular matrix, the multi-sensor measurements with correlated measurement noises are transformed to equivalent pseudo ones with uncorrelated measurement noises; then based on the Kalman filtering, a new multi-sensor fusion target tracking algorithm with correlated measurement noises is proposed.

对于量测噪声相关的多传感器量测，利用Cholesky分解和单位下三角阵的求逆方法，将其转化为量测噪声互不相关的等价的多传感器伪量测，然后基于Kalman滤波，提出了一种解决量测噪声相关情况下多传感器融合目标跟踪问题的新算法。

By measuring missile movement inertia with torsion pendulum, the influences of periodic measurement error, systemic damp, period of swing object and corporative period of t he measured object and swinging object were analyzed. The relation among measurement error of movement inertia, measureme nt period, the period of swing object,corporaˉ tive period of tested object and swing object was proved. The maxi mal ratio between movement inertia for swinging obˉ ject and the measured object under conditions of different errors w as given under typical measurement precision.

通过扭摆测量导弹转动惯量的方法，分析了周期测量误差、系统阻尼、摆动体周期以及被测件和摆动体共摆周期对转动惯量测量精度的影响，得出转动惯量测量误差和周期测量误差、摆动体摆动周期、被测件和摆动体共摆周期之间的关系，给出了在典型的测量精度要求，不同的周期测量误差情况下，摆动体转动惯量和被测件转动惯量之间的最大比值。

The thesis starts with literature survey, analyzes the requirement put forward in special dynamic condition, demonstrates research advancement in modern flash ranging mechanics, selects digital speckle correlation measurement, which has low requirement for measuring condition and object's surface photology condition, with fine resolution power, has prospect of non-contact measurement, develops the ZM-DF-1 dynamic displacement and frequency measurement system.

较充分地论证了现代光测力学领域中主要方向的研究进展，选择对测量环境和对象表面光学条件要求不高，分辨力强、有实现非接触测量前景的数字散斑相关测量方法，开发ZM-DF-1型动态位移与频率测量系统。

Based on the technique of radiate temperature measurement, the author designs a circuit of prismatic decomposition colorimetric radiate temperature measuring. A high resolution A/D converter and measurement range switch technology are adopted to resolve the problem that it has lower radiation power and lower signal sensitivity in the low-temperature stage, while higher signal amplitude and higher need of dynamic range in the high-temperature stage. The technique of the Black Body Furnace demarcates, digital calibration and the quartic curve fitting are applied to correct the sensor and improve its measurement precision.

3研究了辐射温度测量技术，设计了棱镜分光比色辐射温度测量电路，使用高分辨率A／D转换器和量程切换技术解决低温段辐射能量小、信号灵敏度低，而高温段信号幅值大，动态范围要求高的矛盾，应用黑体炉标定技术和数字校准方法以及4次拟合校正技术提高温度测量精度。

The elements of optical waveguide strain-stress measurement and fiber bragg grating strain-stress measurement system based on wavelength division multiplexing and spatial division multiplexing are emphatically discussed; the displacement regularity of stress field induced by roadway group excavating and short wall mining process is analyzed in detail; the concept of roadway "equivalent radius","correcting coefficient of coal and rock mass mechanical parameters",and "mining affecting coefficient" is put forward; the calculation method of "equivalent radius", the method of inversion of "correcting coefficient of coal and rock mass mechanical parameters", and the "mining affecting coefficient" determination method with the field measurement results and so on are provided.

重点研究了光波导应力应变测量原理，以及基于波分复用和空分复用技术基础上的布拉格光纤光栅应力应变测量体系；详细分析了近距离巷道群开掘工作和短壁体系回采工作诱发的应力场的重新分布规律；提出了巷道"当量半径"、"煤岩体力学参数修正系数"、"采动影响系数"等概念；给出了"当量半径"的计算方法、"煤岩体力学参数修正系数"的反分析求算方法、以及通过现

This article will mainly be from the following part of: the first part: About the cost of the concept of change; Part II: Trade Unions about salaries of individual projects deal with change; Part III: Workshop about the deal with repairs Change in fixed assets; fourth Part I: Recognition and Measurement regarding intangible assets on the cost, the cost of the impact of change; Part V: Borrowing Costs about recognition and measurement of cost, the cost impact of change; Part VI: On the recognition and measurement of enterprise income tax on the income tax costs of the Change .

本文将主要从以下几部分进行阐述：第一部分：关于费用概念的变化；第二部分：关于职工薪酬个别项目的处理变化；第三部分：关于生产车间固定资产修理费的处理变化；第四部分：关于无形资产确认与计量对成本、费用的影响变化；第五部分：关于借款费用确认与计量对成本、费用的影响变化；第六部分：关于企业所得税确认与计量对所得税费用的影响变化。

Cosmic space-energy and cosmic gravitation pair is such coincidence, the spatial measurement of stable relative time-space cosmic energy is the 1/3 spatial measurement of cosmic time-space, the spatial curvature of stable relative time-space cosmic energy is the 2/3 spatial measurement of cosmic time-space.

宇宙空间能与宇宙引力的匹配是那样的吻合，宇宙能量的稳定相对时空的宇称为宇宙时空宇称的1/3，空间的曲率为宇宙时空宇称的2/3。

Moreover, online measurement system can be obtained after a fitting formula about water vapour saturated pressure in the gas pipeline at different temperatures is established by using the function chain neural network, which can greatly simplify the software of measurement of gas flux in the pipeline and quickly and truly realize measurement of gas flux in the pipeline in real time and on line in the design range of flowmeter.

在管道煤气计量系统测量中引入管道煤气相对湿度修正，并采用湿度传感器转换相对湿度信号，利用函数链神经网络对管道煤气工况温度下所对应的水蒸汽饱和压力进行拟合，得到基于函数链神经网络的管道煤气流量计量模型和在线计量系统，从而大大简化管道煤气流量计量软件，在流量计设计范围内实现管道煤气流量实时在线计量。

Compared with the developed sound pressure measurement technology, sound intensity measurement technology is still a young acoustic measurement method.

相对于成熟的声压测量技术，声强测量技术还是一门年轻的声学测量手段。

To solve the directionality of spatial magnetic field measurement,two schemes including three-dimensional measurement and simultaneous measurement of transverse,longitudinal components are proposed.

为了解决空间电磁场测量中的方向性问题，提出了三维测量和同时测量横、纵向磁场的两种方案。

But in the latter case, an intracluster rearrangement is needed. Thus, there is a high energy barrier to be overcomed during the transfer process, which makes the reaction unfavorable.

但是甲基上的H原子发生转移的过程中，需要经过一个簇内的结构重排过程，因而需要克服一个较大的能垒，故此反应通道是次要的。

The copy machine is one of the most widely used office machines.

复印机是一种最广泛使用的办公机器之一。