查询词典 datum point

Instead of using the middle-plane as the datum plane, the surfaces of the cavity are used as datum planes in this paper.

通过实验验证了这种表面模型能够处理由流行 CAD系统生成的复杂型腔模型

It is important and difficult for isochronous correlation datum of fluvial facies stratum in exploration and development of petroleum, while high resolving power of sequence stratigraphy based on the datum plane cycle is an additional feasible technical method for it.

河流相地层的等时对比一直是油气勘探开发的重点和难点，而基于基准面旋回的高分辨率层序地层学则为此增添了行之有效的技术手段。

Establishing datum plane is the base assessing surface parameter. It is important to set up perfect datum plane in engineering measurement as well as geometry parameters' shape and positional error inspection.

基准平面的确立，是进行表面参数评定的基础；建立理想的基准平面，在几何量形位公差检测及相关工程测量方面具有重要作用。

It briefly introduces the historical change of Wusong Datum in the Changjiang Estuary region, and analyzes the spatial variations of regional mean sea level and theoretical bathymetrical datum plane in this region.

简要介绍长江河口地区吴淞零点的历史沿革，分析了长江河口地区水域平均海水面、理论深度基准面的空间变化，进而讨论长江河口地区的高程系统。

The task selects the up to the minute mesoscale numerical model as our forecasting model and use thrice fixed nesting and terrain datum of down to dale (highest precision data of 30s) as our terrain datum in the endothecium.

本文选择了当今最为先进的中尺度数值模式MM5V3作为数值预报模式，采用三层固定网格嵌套，选用其最新提供的30S高精度资料作为内层重点考察小区的地形资料。

Using the annual ring datum of elm nearby Lubei Town of Jarutqi, Tongliao City, established the length for 97 years elm standard timeline, according to the standard timeline and the hydrometeorology datum of Lubei area, analyzed the relationship between the elm growth and the hydrometeorology factor.

利用科尔沁沙地通辽市扎鲁特旗鲁北镇附近榆树树木年轮资料，建立了长度为97 a的榆树标准年表，通过标准年表和鲁北地区水文气象资料相关，分析了榆树生长与水文气象因子的关系。

The medium term and the long term cycles of datum plane are made of symmetry structures by the two half cycles of rising and falling, and the short term cycle of datum plane are divided into two basic types of symmetry and non symmetry.

中、长期基准面旋回由上升、下降2个半旋回构成对称型结构，短期基准面旋回分为对称型和非对称型结构。

Numerical simulations were done for a bistable latch valve of the system by FLUENT, and three groups of datum for different fluids were obtained with the same effective exit sectional area. Besides, a static mathematic model for the electromagnetic valve was established based on the obtained datum. Secondly, the motion of the valve spool was realized by UDF file in FLUENT. Three kinds of motions, uniform, acceleration and motion driven by the coupling effect of the liquid resistance and the electromagnetic force, were calculated and compared. The dynamic characteristic of the electromagnetic valve was obtained by analyzing the relationship of the mass flow rate of the inside flow field of the electromagnetic valve, the change of the drop pressure of the passageway of the valve, and motion time.

并针对系统中的某双稳态电磁阀，使用商用CFD软件FLUENT对其进行内部流场的数值模拟，通过使用不同流体介质，不改变阀门有效出口截面积的情况下，分析得到的三组数据，建立了该电磁阀的静态数学模型；通过编写UDF文件，实现对阀芯运动方程的控制，在阀门做由闭合到开启、开启到闭合运动时，控制阀芯分别做匀速运动、匀加速运动以及阀芯受到液体阻力与电磁力作用力的耦合力的运动，分析了三种工况下电磁阀内部流场质量流率和阀门出口入口压降的变化以及运动时间，从而得到该电磁阀的动态特性。

The surface subsidence in the Yellow River delta foreland area brings changes to the land surface height there, and the depth datum in the bathymetric survey is determined on the basis of the level of land bench mark, so the changes in the level of land bench mark will affect the determination of depth datum and the accuracy of bathymetric survey.

国家海洋局，第一海洋研究所，山东青岛 266061文章摘要：黄河三角洲前沿的陆地由于受地面沉降的影响，使地面高程不断发生变化。在水深测量中，深度基准面是根据陆地水准点高程确定的，陆地水准点高程的变化影响深度基准面的确定，从而影响水深测量的准确性。

The surface subsidence in the Yellow River delta foreland area brings changes to the land surface height there,and the depth datum in the bathymetric survey is determined on the basis of the level of land bench mark,so the changes in the level of land bench mark will affect the determination of depth datum and the accuracy of bathymetric survey.

又由于黄河海港附近有一无潮点，其附近的潮汐性质变化大，在黄河三角洲前沿大范围水深测量中，根据测区潮位变化设立足够的验潮站及统一各个验潮站的水尺零点到同一个深度基准面上，是保证水深测量结果可靠的关键。

This is the inheritance of the tribe of the children of Issachar according to their families, the cities and their villages.

19：23 这些城并属城的村庄就是以萨迦支派按着宗族所得的地业。

I've have enough of your garbage.

我听了你的废话。