This paper describes the development status and tendency of the overseas celestial navigation technologies,including double star localization based on the altitude difference method,multiple star vector localization based on the star pattern recognition,autonomous optical horizontal reference technology,radio celestial localization technology,etc.
叙述了国外天文导航技术的发展现状及其趋势,包括基于“高度差法”的两星定位技术、基于星图识别的多星矢量定位技术、自主光学水平基准技术、天文射电定位技术等,并概述了天文导航技术未来的研究方向。
A new method of optical horizontal reference measurement based on CCD sensor is presented .
提出了一种以CCD器件为传感器的光学水平基准的测量方法 ,具体介绍了以单片机 89C5 1为核心处理器的水平基准测量电路的软硬件设计。
The method for determining protective actions based on plant conditions is introduced, including methods for developing emergency action levels(EAL), assessing reactor core damage and estimating the source terms and offsite consequences based on plant conditions.
介绍了美国核管会 (NRC)和国际原子能机构 (IAEA)有关在严重事故期间根据核电厂工况进行防护决策的方法 ,特别是制定核电厂应急行动水平、根据核电厂工况进行堆芯损坏评价、估计源项和确定防护行动的方法。
metre above Principal Datum [mPd]
主水平基准以上……米
This fixture should be provided with a reference leveling surface, so that it can be kept level as the balance deflects.
这种装置应该有一个水平基准面，以便在天平变形时能够使之保持水平。
Use to add up to 4 horizontal baseline dimensions. Attach one endpoint to baseline and one to first feature.
用于添加多达4个水平基准线尺寸。将一个端点连接到基准线，一个端点连接到第一个部件。
at right angles to the plane of the horizon or a base line.
与水平面或者基准面成直角。
Hydropower Project Three-dimensional Standard Parts Database Based on CATIA
基于CATIA平台的水电三维标准件模板库
Adjustment Programming of Level Net on the Basis of MATLAB
基于MATLAB的水准网平差程序设计
Basic English level (equilvent to or above high school).
基本的英文水准（相当与或高于高中水平）。
These are known as ″basic impulse insulation levels″ (BIL). Basic Impulse Insulation Level is expressed in impulse crest (peak) voltage with a standard wave not longer than a 1.2\50s wave.
基本冲击绝缘水平是以不长于1.2;50gs的标准波形冲击峰值电压表示的基准水平。
To measure the different elevations of(a tract of land)with a level.
测量水平用水准仪对（土地）做水准测量
Analysis of China′s Information Technology Level Based on the Networked Readiness Index;
基于网络准备能力指数来分析我国信息化水平
The enactment of the inspiring regulation and of the datum level on the civil aviation charge;
激励性规制与民航票价基准水平的设定
Spatial Autocorrelation Patterns of Datum Land Prices of Cities in a Region
区域城镇基准地价水平的空间自相关格局分析
Development of general leveling adjustment program based on VB6.0
基于VB6.0的加权自由水准网平差程序的开发
(c) where such market access opportunities for a product are greater than 30 per cent, the base trigger level shall equal 105 per cent.
（c）如一产品的市场准入机会高于30％，则基准触发水平应等于105％。
Study on Water Quality Standards for Storm Water Infiltration Based on Risk Assessment in Pinggu Basin of Beijing
基于风险评价的北京平谷盆地雨洪水回灌水质标准研究
optical eye level finder
光学直视水平瞄准器
A flow pattern identification method is proposed based on the least standard criterion.
基于最小方差预测准则，提出水平管油气两相流流型辨识方法。
Research on the S95 Standard Based Evaluating Method for Flexibility of Production Capability;
基于S95标准的企业产能柔性水平评价方法的研究