查询词典 precision

The measurement system error model analysis is introduced into power system real time network state analysis as an important part for the first time, which can improve on the state estimation quality and provide the capability to monitor the operation of the measurement system; 2. The theory and algorithm of the on-line estimation and update of measurement noise variance based on the relation between the residual variance and noise variance. The statistic properties of the sample variance are discussed and the relation between the estimation precision and sample size under given confidence level is derived; 3. The theory and algorithm of detection and identification of measurement bias are presented, which is based on the relation between residual mean and noise mean. The statistic properties of sample mean are discussed and the relation between estimation precision and sample size is derived; 4. The Givens orthogonal transformation algorithm is selected to be the essential algorithm of state estimation, the fast orthogonal transformation algorithm with damp factor and the algorithm which can handle the zero injection measurements efficiently are presented; 5. The quantity analysis theory of bad data detectivity and identifibility are presented, which describes the relation between the elements in matrix W〓 and bad data amplitude and can provide the theory base for measurement system design and valuation.

一、首次将量测系统误差模型分析做为一个环节引入电力系统实时网络状态分析中，为EMS系统增加了实时监视系统运行、修正量测系统误差模型的新功能，进一步发挥了实时网络状态分析应用软件的潜力；二、首次提出了应用样本方差在线估计与修正量测系统误差方差的基本理论，讨论了样本方差的统计性质和概率分布，推导出了样本容量、估计精度和置信度之间的关系，给出了在线估计与修正量测系统误差方差的算法；三、首次提出了应用样本均值在线检测与辨识量测偏差的基本理论，讨论了样本均值的统计性质，推导了样本容量、估计精度和置信度之间的基本关系，给出了在线检测与辨识量测偏差的算法；四、在状态估计算法设计中，以Givens变换算法做为基本算法，提出了快速正交变换阻尼因子法和可以有效地处理零注入量测的混合法，并对实时应用中的一些问题进行了讨论；五、提出了不良数据可检测性与可辨识性的定量分析理论，揭示了描述量测系统配置、网络结构与参数的残差灵敏度矩阵中的元素与不良数据的幅值在可检测、可辨识能力上的定量关系，为量测系统配置设计与评价提供了理论基础；六、综合国内外最新研究成果，采用自适应自回归预测技术和稀疏矢量技术，构造了较完善的不良数据检测与辨识算法。

Through the interferencing light intensity under a sine-wave modulation signal analysis, the output signal of fiber-optic gyroscope is demodulated. And then the change of the output signal of gyro is gotten. Through the analysis of the change we know that the effect of residuary intensity modulation on the performance of Interferometric Fiber Optic Gyroscope is related with the precision and accuracy requirements of IFOG. The higher precision, the more obvious effect.

本文首先通过正弦波调制下干涉信号光强分析解调出光纤陀螺的输出信号，进而得出残余强度调制存在的情况下陀螺输出信号的变化情况，同时，通过分析陀螺信号的变化说明残余强度调制对光纤陀螺性能的影响与陀螺精度要求有关，精度越高，其影响越明显。

A fast high precision multichannel MSC1210- based system for measurement of the coil resistance of electromotors is introduced in this paper. The fundamental of the system is discussed. The hardware and software designing as well as the major characteristics of MSC1210 is introduced. Better anti interference measures are considered in software and hardware designing to reduce the exterior influence. And the error analysis of the system is carried out. The system has the merits of high precision,low noise,strong anti interference,convenient operation and so on.

文章阐述了以一种新型单片机MSC1210为核心的多通道、高精度、快速测量电动机绕组电阻的测量系统及其基本原理，介绍了MSC1210单片机的主要特性及系统的硬件设计和软件设计，采用了软件和硬件抗干扰技术以减小外部干扰对系统的影响，并对该系统进行了误差分析，具有准确度高、噪声低、抗干扰能力强且操作方便等优点。

Experiments of two areas prove that the mathematical model for SPOT5 HRS stereo mapping is correct, and it can achieve a good precision. The experiments also prove that the formula of satellite stereophotogrammetry is right, and it can be applied to estimate theoretical precision of other satellite stereophotogramm-etry.

通过对两个实验区的实验证明本文的SPOT5 HRS立体测图的数学模型是下确的，并能够达到较好的精度；实验也证明了本文推导的卫星立体摄影测量的理论精度估算公式是正确的，并适用于其他卫星立体摄影测量理论精度的估算。

At present, the processing of products are: mechanical hand supporting parts, electronic equipment Various components, microwave devices cavity, high power radiators, IT and high-grade precision machine parts, aluminum die-casting pieces of copper, aluminum and other communications, IT equipment structure pieces; tooling and seized equipment, welding pieces of metal processing , Spray paint, precision machinery parts scattered the whole set of processing and agents to provide customers with cast aluminum metal surface oxidation, Ranhei, electroplating, heat treatment, such as processing.

目前主要加工的产品有：机械手配套零部件、电子设备各种零部件、微波器件腔体、大功率散热器、IT高档精密机加件、铝铜压铸件、铝型材等通讯、IT设备结构件；工装及检具，金属结构件焊接加工、喷涂烤漆、精密机械零件整散套加工及代理客户提供铸铝与金属表面氧化、染黑、电镀、热处理等加工。

Yi-li to Plastic Hardware Mold Factory About the Company in Hong Kong was founded in 1986, specializing in the production of various types of precision molds, such as audio, OA products, digital camera parts, DV digital video camera shadow box, computer peripherals, computer plug-precision , 3°disk mode, mobile phone parts, ear plugs and battery boxes.

本公司在香港创建於1986年，专业生产各类型精密模具，如音响，OA产品，数码照相机零件，DV数码摄录机影盒，电脑周边设备，精密电脑插头，3寸半磁碟模、手机零件、耳塞及电池盒等。

In practical application of numerical control lathe, the sice precision of numerical control turning can be conteolled and ensured effectively by effective steps considering the influence of geometrical Rarameters to the sice precision of numerical control turning .

在数控车床加工的实际应用中，针对刀具几何参数对数控车削加工尺寸精度的影响，采取有效的措施，使得数控车削加工的尺寸精度，得到有效的控制和保证。

If the IEEE single-precision significand has more precision than the internal representation, it will be rounded to the internal representation using the round to nearest rule.

如果 IEEE 的单精确有效数字比内部表示法有更多的精确度，它将会被用四舍五入到最接近的规则来四舍五入成内部表示法。

If the significand of the internal representation of r has more precision than the IEEE single-precision format, it will be rounded using the round to nearest rule.

如果内部表示法 r 的有效位数比 IEEE 单精确格式有更多的精确度，它将会被以四舍五入到最近值规则来四舍五入。

The relative precision of baseline is 10〓 in average. According to the similarity transformation of combined solutions of two adjacent weeks, the displacement precision is about 2.0mm.

根据基准站相邻两周综合解的相似变换结果的残差求得水平分量的中误差为2mm左右，此指标反映了位移的精度。

Foods high in this vitamin include oily fish such as salmon, tuna and, and fish liver oils.

维生素D含量高的食物包括诸如大麻哈鱼、金枪鱼和鲭鱼之类的油鱼以及鱼肝油。

We need you to cosign our public letter demanding that press intimidation cease immediately, and that all charges be dropped.

我们需要您cosign我们的公共信，要求记者立即停止恐吓，并要求所有收费下降。