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high-accuracy gravity survey
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  “high-accuracy gravity survey”译为未确定词的双语例句
     · High-accuracy gravity survey which mainly focuses its attention on buried hill;
     4.开展以勘探古潜山为主要对象的高精度重力测量;
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  相似匹配句对
     high salience.
     (3)“高显著度”。
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     Its accuracy is high.
     使用模型参数进行孔隙度、含水饱和度计算 ,计算结果精度高。
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     It is of high toxicity.
     该菌具有较强的毒力。
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     high-technology;
     产业高技术化;
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     High accuracy.
     高精度。
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Oil gravity survey in China began in 1945, then rather flourished in 1950s.By the end of 1950s,the petroleum industry had 36 gravity survey crews; however, at the beginning of 1960s,the gravity survey crews began to decrease with years. By the mid 1970s, the crew number stopped dropping and staned increasing because gravity survey scored quite good geological effect in exploring buried hills and because gravity survey must be done urgently in many medium-sized...

Oil gravity survey in China began in 1945, then rather flourished in 1950s.By the end of 1950s,the petroleum industry had 36 gravity survey crews; however, at the beginning of 1960s,the gravity survey crews began to decrease with years. By the mid 1970s, the crew number stopped dropping and staned increasing because gravity survey scored quite good geological effect in exploring buried hills and because gravity survey must be done urgently in many medium-sized and smallsized basins. The practice shows that gravity survey is a quite good exploration method for researching into areal geological structure be- cause of its merits: low cost, fast operation and nice effect. Furthermore, gravity survey also brings good result in researching into the local geological structure, particularly the buried hills. Looking forward to the future,we have the following works to do: · Areal exploration of new basins; · New comprehensive study of old basins using not only new and old gravimetric data but also other geophysical and drilling data; · Mountainous-district gravity survey in combination with seismic exploration, and the improvement of both its accuracy and its effect; · High-accuracy gravity survey which mainly focuses its attention on buried hill; · Scientific researches on borehole gravity survey.aerogravity survey and the new data processing technique.

我国于1945年开始进行石油重力勘探,五十年代有过较大的发展,五十年代末石油系统已有36个重力队,从六十年代初开始,重力队数逐渐减少,直至七十年代中期以后,由于重力勘探古潜山取得了较好的地质效果,并且有许多中小盆地急需进行重力勘探,重力队数才得到稳定和发展。事实证明:重力勘探是研究区域地质结构较好的物探方法,具有投资少、速度快、效果好的特点,在研究局部地质结构,尤其是勘探古潜山方面也有良好的效果。展望将来,有以下几方面的工作要做: 1.开展新盆地的区域勘探; 2.利用新、老重力资料,结合其它物探及钻井资料重新综合研究老盆地; 3.配合地震勘探开展山区重力勘探,并提高其精度和效果; 4.开展以勘探古潜山为主要对象的高精度重力测量; 5.探索井下重力测量、航空重力测量以及新的资料处理技术。

In this papcr, we make use of the orthogonal transformation method to transform the coefficient matrix of trcnd surface analysis to a diagonal matrix so as to avoid solving ill-conditioned system of cquations and improve the precision of solution . Meanwhile , the normal equations are transformed to a first-ordcr system of cquations which is very casy to solve,thcrefore, the solving process is sped up. Furthcr, the order-fixed trend surface analysis which is responsible for false anomaly is replaeed by sliding...

In this papcr, we make use of the orthogonal transformation method to transform the coefficient matrix of trcnd surface analysis to a diagonal matrix so as to avoid solving ill-conditioned system of cquations and improve the precision of solution . Meanwhile , the normal equations are transformed to a first-ordcr system of cquations which is very casy to solve,thcrefore, the solving process is sped up. Furthcr, the order-fixed trend surface analysis which is responsible for false anomaly is replaeed by sliding window and order-variant trend surface analysis. As a result, the application of the method in recognizing weak anomalies of high accuracy gravity survey and determining the accurate position of buried hill in oil-bearing sedimcntary basin has brought forth sat isfactory results.

本文引用正交变换法将趋势面分析中的系数矩阵化为对角阵,避免了求解病态方程组,提高了解的精度。同时正规方程组可变为十分容易求解的一次方程组,因而加快了求解速度。采用自动改变滑动窗口,改变趋势面阶数的办法,解决了因一次性选取固定趋势面而出现虚假异常的难题。将该方法应用于某含油气沉积盆地上高精度重力细测微弱异常的识别及古塔山精确位置的求取,取得了满意的效果。

An example is taken to show the shape characteristic of terrain corrections for near, mid and far areas in high accuracy gravity survey in hilly area. Some problems are discussed which include mid layer correction formula, datum choice, mid layer density determination, the possible terrain correction for near and far areas, and so on. Authors recommend a new method for terrain correction in subareas and a new digital model for terrain correction.

本文以一个具体实例来说明山区高精度重力测量中近、中、远区地改值的形态特征。对中间层改正公式、基准面的选择、中间层密度的确定及是否需要做近区、远 2区地改等问题进行了讨论。最后 ,提出了一个新的地改分区方案及地改数字模型。

 
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