大地测量

The relations of inducing skin current of shielding layer, core voltage and core current with the environment field were obtained. The change of shield layer current wave with grounding state of external shield and core voltage with loading resistance was analyzed. According to the dependence of shield layer current oscillating frequency on electromagnetic wave propagation velocity, conception of transporting line of shield layer-ground with equivalent relative dielectric constant was presented. fited equation of equivalent relative dielectric constant with change of cable height was given.

试验得到九芯电缆屏蔽层感应电流、芯线感应电压、芯线感应电流以及环境场之间的关系；分析了皮电流波形随外皮接地状态的变化，芯电压随负载电阻的变化；基于皮电流振荡频率与电磁波传播速度的关系，提出了屏蔽层-大地"传输线"等效相对介电常数概念，给出了等效相对介电常数随电缆高度变化的拟合式；皮电流计算与测量结果在波形、振荡周期、衰减规律等方面有较好的一致性。

Geodetic leveling should be done with staves in which the divisions are marked on a strip of invar.

大地水准测量必须使用刻度标于不胀钢片上的水准标尺。

Geodetic levelling should be done with staves in which the divisions are marked on a strip of invar.

大地水准测量必须使用分划刻在因瓦带上的水准标尺。

In general the accuracy of geoidal heights, as given by spirit levelling, much exceeds that of any other system.

一般说来，水准测量测出的大地水准面高程的精度，远远超过任何其它方法的精度。

We found that the mean square error of difference value between GPS monitoring deformation and the second-order leveling surveying deformation is less than 1 mm, and there is a smaller systematic error between the ellipsoidal height deformation and the second-order leveling deformation ,whose value is about 0.5~1 mm; however, this system error does not affect the outcome of vertical deformation monitoring.

结果 得到的GPS监测变形量与水准测量变形量差值中误差＜1 mm，且GPS所测大地高变形量与二等水准测得的变形量间存在一个较小的系统偏差，其值在0.5~1 mm之间，该系统偏差不影响垂向变形监测的结果。

The system consists of a multi-reflection spherical cavity and is suitable for different kinds of specimen,such as concave mirrors,convex mirrors and plane mirrors.

通过积分球和补偿电路，大大地降低了对机械部件的加工要求和激光强度不稳给测量带来的影响。

This paper deals with the basic geothermal Characteristics and deep thermal settings in Yunnan Area by means of systematic borehole geotemperature logging, terrestrial heat flow measurements, radiogenic heat production determination and calculation of frictional heating in faults.

本文通过云南地区系统的钻孔地温测量、大地热流测试、放射性热源分布研究以及断层摩擦剪切生热的定量计算，阐明了云南地区地热基本特征与深部热背景。

Seafloor magnetolluric detection is greatly influenced by environmental factor, which is different from onshore similar survey technology.

海底大地电磁探测与陆上同类探测的技术差别之一是其测量过程受环境因素的影响较大。

The selection and orientation of the reference spheroid; the astronomical observation system; length standard; the computation of deflection of vertical and height anomaly; the problem of adjustment carried out on the spheroid;the treatment of Laplace arimuth in adjustment...

第二，参考椭球的选择和定位；天文测量系统；长度基准；垂线偏差和高程异常的计算；在椭球面上进行平差的问题；平差中拉普拉斯方位角的处理；各级大地网整体统一平差的问题。

Deflection of the vertical ; astro gravimetric leveling ; geoid ; CCD automatic astrometer ; method with single pole

垂线偏差；天文重力水准；大地水准面； CCD自动天体测量仪；单极坐标法

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。