水准面

At first the article describes basic theory and principles of precise determination of local geoid. Then discuss and make a research about geometrical method and gravity method at length, respectively.

本文首先系统地研究了精化大地水准面各种方法的原理，然后分别对其中的几何法和重力法进行了详细的讨论和研究。

Equipment and methods have evolved from mule-drawn disc-harrows and tractor grouser bars to 1000 hp units with special equipment capable of pulverizing bituminous concrete in place to a precise depth, mixing that material with a liquid binder and repaving to an accurate grade and profile.

再生设备和方法已由骡拉圆盘耙和拖拉机履带销发展成为带有特殊装置的能够碾压含沥青混凝土至精确深度，混合该物质和液体粘合剂并重新铺至准确水准面和形状的1000马力组件。

The conception of crustal isostasy produces a great effect to the geo-scientific research; especially take an important role in the studies of Geodesy and Geodynamics.

地壳均衡的概念对地学的研究有着极大的影响，特别是在大地测量学和地球动力学中发挥了重要作用。均衡重力大地水准面异常作为研究海底地形、地壳结构、构造及地震活动的重要手段，已被科学家广泛应用。

In the course of the transform from spherical surface coordinates of radar s station to right-angle coordinates of the command center fulfilled by the earth-centered coordinate , when the rotation of the earth and the factor of topography and the function of the gravity are considered.

在利用地心坐标完成从雷达站球面坐标到指挥中心直角坐标的转换中，当考虑到地球自转、地形因素及重力作用时，所采用的地球模型与地球实际水准面并不重合，坐标系的坐标轴与实际之间存在着垂线偏差。

GPS ; quasi-geoid ; normal height ; precise model ; isoline of height anomaly ; deflection of the vertical

GPS ；似大地水准面；正常高；精化模型；高程异常等值线；垂线偏差

The analysis based on the theoretical model of the geoidal height shows that the accuracy of this formula is quite high.

大地水准面高理论模型下的分析表明，该公式有较高的精度。

A great geoidal low in the Euro-Asian continent is just an indication of the large-scale tectonic process in satellite global gravity field.

欧亚巨型的大地水准面低正是这一大规模构造过程在全球卫星重力场中的表现。

A practical calculation is done based on the geoidal height data with a resolution of 2'×2', and the results indicate that the contribution of the innermost area to the gravity anomaly recover should not be ignored.

以分辨率为2'2'的大地水准面高数据为背景场进行了实际计算，结果说明中央区对反演重力异常有不容忽视的贡献。

The performance of retracking is assessed by comparing SSH with geoidal heights from a high resolution geoid model around Taiwan.

重定之成果是藉由大地起伏比较海水面高来评估，该大地起伏是由台湾周围高解析度大地水准面模型而得。

In order to improve the precision of the altimetry gravity computed by the inverse Stokes formula, the geoidal height of the innermost area is expressed as double cubic polynomial, and a formula to calculate gravity anomaly of this area is derived after the non-singular transformation is introduced.

为提高利用逆Stokes公式反演测高重力的精度，将中央区大地水准面高表示成双三次多项式插值形式，引入了非奇异变换，推导出了重力异常的计算公式。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。