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In the sub-system, the differential single-frequency GPS receivers are used to measure the landslide displacement automatically (the measurement precision reaches 1cm in horizontality and 2cm in verticality), micro control unit is utilized to realize data collecting, data compression and data encapsulation of GPS information including carrier phase data.

该子系统用差分GPS单频接收机实现滑坡位移自动测量(水平精度1cm,垂直精度2cm),用单片机实现了对GPS接收机输出的载波相位观测等卫星信息数据的实时采集、压缩、存贮和IP数据包封装等。

On principle of those that suiting for field application, high performance and low costs, a real-time landslide monitoring system which adopted difference GPS network, wireless data transfers, background data processing by PC, uninterrupted operating in 24 hours, etc, is built during the research process. Its precision of displacement-detecting reaches 1cm in horizontality and 2cm in verticality.

研究过程中着重针对上述情况,以适合野外现场应用、性能优越、造价低廉为原则,研究构建了一套采用差分GPS组网、无线数据传输、微机后台数据处理等技术,可进行24小时连续自动监测,位移检测达到水平精度1cm,垂直精度2cm的实时滑坡监测系统。

Because the weights are determined by the correlation of code sequence and estimation error of channels, which can be nearly determined by system load factor, we determine the sub-optimum weights by system load factor through simulations, and substitute the hard-decision symbol function by soft-decision hyperbolic tangent function to decrease the risk of error decision.

由于加权因子取决于前级符号估计的可靠性。也就是取决于扩频码互相关系数与信道估计精度,在随机扩频系统中,估计精度可近似由系统负荷决定,因此可根据系统负荷决定加权因子,以很小的性能降低代价换取计算量的极大降低。同时,为进一步降低误判风险,使用带有斜率控制因子的双曲正切函数代替常规的符号函数。

In this paper the key points discussed were that, under the condition of a sharp hypsography of desert areas of Ordos basin, we used some new geophysical methods in the investigation of surface structure to obtain high accurate surface structure data and provide reliable scientific foundation for data acquisition and process; we dealt with the optimum coupling of surface geophones and the digital realization technique in desert areas, dug into a method of high frequency compensation according to attenuations by absorption near surface, adopted data processing and correction technique, solved high frequency attenuation and geophone coupling, eliminated the influences of sharply transverse fluctuation of hypsography in desert area on the seismic data, enhanced the fidelity and SNR of seismic section, and finally picked up more geologic information on the seismic profile and improved the precision of the lateral prediction for the reservoir beds.

本文旨在研究鄂尔多斯盆地沙漠区地表变化比较大的情况下,在表层结构调查中通过应用一些地球物理新方法,以获取高精度的表层结构数据,为资料采集和数据处理提供更科学的依据;研究在沙漠区地表检波器最佳耦合的方式与数字实现技术,研究通过近地表的吸收衰减规律进行高频补偿的方法,采用数据处理校正技术,解决高频吸收及检波器耦合,消除沙漠区表层横向剧烈变化对地震资料的影响,提高地震剖面的保真度和信噪比,从而使更多的地质信息能够从地震剖面中反映出来,提高储层横向预测的精度

High measure precision: High precision and low operation error can meet needs of various levels of operator, identical measurement results can be gained in spite of different practical experiment of operator.

测量精度高:不但测量精度高,且个人操作误差小,不同的测量人员,不管有无经验均可获得相同的测量值。●使用范围广泛:可测大型、重型工件某个部位的尺寸,也可适用于高温、放射性等恶劣环境条件下的测量。

Furthermore, it expose accuracy control of image map by accuracy analysis.

此外,在精度分析的基础上,还对影像地图的精度控制作了阐述。

To fulfill the requirements of the motion compensation, the related errors of the IMU equipments are quantitatively analyzed meanwhile.

初始对准是捷联惯性导航的关键技术之一,初始对准的精度直接影响导航系统的工作精度

Based on the simulation of the error separation techniques about three-point method, the included angle and the angle deviation among sensors are determined and made recommendations to improve the algorithm.

在对回转误差分离技术—三点法误差分离精度的仿真基础上,确定了传感器安装角度与安装精度的整体方案,并对算法提出了改进建议。

So it cannot be used in the industrial assembly robot on a large scale.

精度的装配操作需要装配机器人在具有足够的位置控制精度的同时,还需具有力控制能力。

The precision of instruments that measure center of mass and inertial moments is below 1%. It is an advanced level of national and international.

本研究中还研制出了精度较高的人体惯性参数测量系统,其中,质心仪和转动惯量的测量精度均可达到1%以内,属国内和国际先进水平。

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