查询词典 datum level

The center and orientation of the ellipsoid is what we call the datum.

这个椭球面的中心和方位就构成了我们所说的大地基准面。

The WGS 84 Datum is generally accepted as the best simple mathematical model for the overall shape of the earth, and is an ellipsoid with an equatorial radius of 6378.1370 km and a polar radius of 6356.7523 km, and is centred on the earth's centre and orientated to the spin axis.

WGS 84基准﹙ WGS 84 Datum ﹚被普遍接受为地球整体形状之最简单数学模型，是一个赤道半径﹙ equatorial radius ﹚ 6378.1370公里和北极半径﹙ polar radius ﹚ 6356.7523公里之椭球﹙ ellipsoid ﹚，以地球的中心为中心点，并定位於﹙ orientated to ﹚自转轴﹙ spin axis ﹚。

measurement of settlement ; mean square error of observation ; datum point ; observation point

本文针对沉降变形测量的几个核心问题，予以探讨和研究。1 沉降变形测量等级的

With experimental datum, the models parameters are optimized with Levenberg-Marquardt algorithm, and for the best fitting curve of Fabry-Perot etalon transmittance.

根据实验测量数据，利用Levenberg-Marquardt算法对理论模型进行参数优化估值，获得测量数据的最佳拟合曲线。

With the investigation of the domestic and foreign literature systematically, the bases on the domestic and foreign present research and the comprehensive utilizations of the various knowledge of fluid mechanics in porous medium, reservoir engineering, mathematical physics, perforation completion, numerical simulation and so on, this article takes numerical simulation of gas reservoir of water solubility as the research aim which has completed following research works and obtained the corresponding research results: it analyzes the nature of the Water-soluble gas and formation water as well as the influent factors of the solubility through the study of massive materials; It establishes mathematical models three-dimension, the dual medium, the gas-water phase through the way of finite difference in the migration of water-soluble gas, which describes the entire process of release, migration and production in formation, where it considered the problems of variable bubble point; According to the numerical models of gas reservoir of water solubility it provides solution procedure that based on black oil model; It discovers that there will obtain the good effects in the lowly speed of development through simulation; the reinjection of formation water may largely enhance the produce degree of water-soluble gas when we consider reinjection in simulator; It considered the influence of perforated completion on development so as to increase the simulator"s versatility, It discovers that the simulator may reflect the conditions of development when we exanimate he simulator"s reliability with the empirical datum.

本文以水溶性气藏数值模拟研究为研究目标，在系统调研国内外文献、深入分析国内外研究现状的基础上，综合利用渗流力学、油气藏工程、数学物理方法、射孔完井以及数值模拟理论等多方面的知识，完成了以下研究工作并取得相应的研究成果；①通过对大量的资料调研，分析了水溶气、地层水性质、储层地质性质以及影响气体在水中溶解度的因素。②考虑到由于高压产生的大量水力裂缝，采用有限差分方法建立水溶气运移的三维、双重介质、气-水两相全隐式数学模型，该模型描述了水溶气在地层中的释放、运移和采出的整个过程。③在原有黑油模型的基础上，根据水溶性气藏数值模型编制了该数值模型的求解程序，该程序可以求解单重、双重介质两种情况。④通过模拟不同开采速度对水溶气开发效果的影响，发现开采速度较慢的时候可以取得较好的开采效果。⑤在模拟器中考虑了注水对水溶性气藏开发的影响，地层水回注可以大幅度提高水溶气的采出程度。⑥为增加模拟器的通用性，在模拟器中考虑了射孔完井方式对开采的影响。⑦检验模拟器计算的可靠性，发现在使用实验数据对水溶性气藏进行模拟时，模拟器可以很好的反映气藏开发的状态。

Obviously the two terms are experientially equivalent on the Humean or sense-datum view of experience.

吗？显然，在经验的感觉材料或Hume式看法中，这两个词项在经验上是等同的。

In this paper these parameters were studied based on the datum observed in Yongledian irrigation experiment station in Beijing.

这些参数影响SPAC系统中能量的分配和水分传输规律。同时，在采用该模型模拟农田作物的水热运移时，过去的许多算法中考虑叶面积指数主要是用它来计算消光系数k和腾发量等。

As well as the experiment fitted curve and carries on the comparison demonstration simulation result basically with other correlation reference in empirical datum with the theoretical analysis experiment result consistent.

以及实验拟合曲线并与其他相关参考文献中的实验数据进行比较显示仿真结果与理论分析实验结果基本一致。

Use the datum to design and calculate the FRP flue conduit of lectricity generating station of SANHE.

将研究所得的材料数据用于三河电厂玻璃钢烟道的设计、制备。

The paper reports on a study of datum line s errors, in addition to comparing geodesic line with short range line while expanding various kinds of shell plates and analysis error incurring reasons and error s distribution law.

本文把不同外板展开方法的测地线和短程线进行比较，分析其误差产生的原因和分布规律，从而来研究外板展开准线的几何精度。

Smoking cigarettes adds to the Computer Desk Computer manufacturer computer mouse Computer Computerized collar knitter machine Conduit Bodies construction board Container Bag Control Arm Cooking Thermometer general levels of air pollution as well as damaging our health.

吸烟不仅对健康有害，而且增加空气污染程度。香烟雾含有多种有害物质：不仅有致癌化学物质、有某种能阻止氧气进入血液的气体，还有引起血压增高、心速加快的被称为尼古丁的物质。

He is one of my favorite actors.

他是我最喜欢的男演员之一。