查询词典 accuracy of measurement

In the algorithm, the conditional linear state equation is first inserted into the measurement equation, which fuses the linear state process noise and the original measurement noise, whereafter the GHF is used to estimate the nonlinear states. Then the estimated means of the nonlinear states are inserted into the linear state equation and the original measurement equation to estimate the linear states by the KF. Moreover, in order to improve the accuracy of the estimates, the estimated variances of the nonlinear states are fed back to modify the estimations of the linear states using the KF.

算法将模型中的条件线性状态方程代入观测方程，并融合线性状态的过程噪声和观测噪声，由GHF获得非线性状态的估计；再将非线性状态的估计均值代入线性状态方程与观测方程，由KF获得线性状态的估计；获得的非线性状态估计方差还用于修正由KF估计的线性状态，以提高精度。

At last, the factors affecting pitch measurement accuracy of Marh891E Gear measurement center was analyzed; the hardware and the software of the ultra-precision gear total cumulative pitch error measurement device were improved, which perfected measurement system and increased the measurement efficiency and accuracy.

本文最后分析了Marh891E齿轮测量中心上、下顶尖不同轴对被测件齿距精度的影响，并通过具体分析对其进行调整；对超精密齿轮齿距累积总偏差测量装置的硬件控制部分及软件部分做了改进，完善测量系统，提高检测效率和精度。

In the device, a four-post frame was adopted, two synchronously rotating grip holders were used to realize rigidity rotation of the specimen, and the axial movement of the upper grip holder implemented the tension/compression loading. Positioning accuracy in the axis, radial and circumferential directions were achieved by adopting many advanced and delicate technologies. Measurement on the device indicated that the actual positioning accuracy of the device was better than the kinematic positioning accuracy. Evaluation test on the system indicated that the spatial resolution is better than the pixel size without considering the noise.

该装置采用了四柱式框架结构，采用上下夹头同步转动实现试件相对于框架的刚性转动；上夹头作相对于框架的轴向运动实现对试件的加载；在加载和转动装置中采用了诸多高精技术，实现了试件高精度的轴向定位、径向定位和刚性角度定位；对装置的精度检测表明其实际的定位精度优于运动学定位精度要求；对系统的计量考评初步表明，系统不计噪声的空间分辨率优于X射线CCD的像素10.9μm。

The effect on temperature measurement accuracy was analyzed by mechanical modulating disk in the real-time temperature measurement system using lasers InGaAs/I and pyroelectric detector LiYaO3 based on Kirchhoff law. A method of altering the influence of measurement accuracy was presented by mechanical modulating disk.

分析了一种基于基尔霍夫定律的钽酸锂(LiTaO3)热释电探测器作为接收元件的实时测温系统中，机械式调制盘对测量精度影响，提出了改变机械式调制盘对测量精度的影响的方法；介绍了液晶调制器的结构、对辐射调制的原理以及在使用过程中的优点。

Compared with the results of infrared polarimetry measurement,common polarimetry measurement and Ion exchange chromatography measurement,we can preliminary found that the accuracy of Near Infrared polarimetry measurement is better than common polarimetry measurement.

就糖厂中间制品的蔗糖分用近红外旋光法和普通旋光法进行了测定，并且引入离子色谱法测定作为评判，对比分析，初步得到近红外旋光法较之普通旋光法的测定准确度要高的结论。

Astrometry with new technologies created and is dedicated to the Space Telescope astrometric space orbit around the Earth observation and research on the scientific .1989 8 8, the European Space Agency launch astrometric Satellite Iba Valley satellite, which contains a 29 cm diameter reflecting telescope, four ground stations for data reception and analysis with the aim of space-based observations compiled by 120,000 to contain space for satellite measurement of star form, the location accuracy of ± 0002, parallax measurement accuracy ± 0002, on their own a year 0002, CDCDCD preliminary estimate of the above three data are now actual for the 0004,0003 and 0005; CDCDCD190 year in April the U.S. launch of the Hubble Space Telescope, containing 24 m diameter Wang C far mirror can work 15-20 years, 17-18 so you can measure the parallax of stars, are hundreds of thousands of stars of the measurement results.

伴随天体测量新技术而产生，是专门用于天体测量的空间望远镜在围绕地球的空间轨道上进行观测研究的科学。1989年8月8日，欧洲空间局发射天体测量卫星伊巴谷号卫星，它载有口径29厘米反射望远镜，4个地面观测站进行资料接收与分析，目的是要通过空间观测编出含星12万颗的空间测量星表，位置精度为±0002，测量视差的精度为±0002，自行为每年0002，CDCDCD现在初步估计上述三个数据实际为0004、0003和0005；CDCDCD190年4月美国发射哈勃空间望远镜，载有口径24米的望C远镜，可工作15—20年，可以测量出17—18等星的视差，得到几十万颗星的测量结果。

The tidal river discharge observing system of this thesis gives a new method and experience of the hydrology observing to the river reach and cross section with complicated landform and flow, or busy shipping. This system has achieved 3 innovations: instruments for measurements which use the unmechanized rotor and continue measuring ADCP as the velocity mainframe; methods of velocity measurement which change the vertical velocity measurement to horizontal velocity measurement; the tidal discharge measurement which solve the problem that current method of discharge measurement can not achieve the accuracy of the criterion according to the continuous real time observing over the velocity of flow.

本论文研究的感潮河流流量监测系统，具有测验设备的创新，用可连续测验的非机械转子式的声学多普勒流速剖面仪为测速主机；流速测验方式的创新，改变以往测取垂向流速为水平流速的方式；潮流量测验方式的创新，对流速进行连续实时的监测，解决了用现行测流方法达不到规范要求精度的问题；为地形、水流复杂或是航运频繁的测验河段和断面，提供水文监测的新方法、方式和经验。

In order to raise the accuracy of the measurement of tangent of dielectric loss angle in XLPE cables,efforts were made to explore the effect of sample preparation and use of protective ring,i.e.the effect of different protective rings and different distance between the protective ring and the insulation shield on the accuracy of the tgδ measurement under a given measuring voltage.

为了提高交联聚乙烯绝缘电力电缆介质损耗角正切测量的准确性，对电缆试样制作保护环等问题进行了深入地探讨，即在一定的测量电压下，采用不同的保护环以及保护环与绝缘屏蔽之间不同的距离，对tgδ测量值的影响进行了探讨，并对测量工作提出了应注意的若干问题。

Through indoor and outdoor experiments, it was proved that the designed 3-D intelligent measurement system for field landscape and Laser leveling aided decision-making support system can work stably. The 3-D intelligent measurement system can achieve an accuracy of 2cm in attitude measurement. The measurement efficiency is two times higher than that of using measure pole of imported equipments. The measurement system developed can provide basic decision-making support for laser controlled field leveling.

通过室内和室外试验表明：自主设计研发的智能三维地形测量系统和激光平地辅助决策支持系统可以正常稳定工作；智能三维地形测量系统高程测量的误差小于2cm，工作效率同比同类设备高2倍多；激光平地辅助决策支持系统能为激光平地作业提供必要的决策支持。

Laser-based metrology and grating-based metrology are two main ultra-precision tools of dimension measurement. However, very few research work has been done on grating-based nanometrology compared with laser-based nanometrology till now because many people, including some grating researchers and specialists, hold the idea that the accuracy of grating-based measurement is lower than the laser's and can only reach micrometre or sub-micrometre level. They consider that it is unfeasible to get nanometer-scale accuracy using grating-based sensors.

激光技术和光栅技术是毫米级以上量程的精密几何量测量的两种最主要手段，目前，用激光进行纳米测量的研究已经很多，但光栅纳米测量技术的研究却很少；很多人，包括很多光栅研究者和测量专家，都认为，光栅测量的精度不如激光，其精度还只是停留在微米量级上，用光栅来进行更高精度的测量以至纳米测量是难以实现的。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。