查询词典 arc length

The parameter equation, tangent, normal plane, the length of the arc, curvature, the basic equation of the spatial curve, torsion and the equation of the curve in flat surface etc.

为解决实际中各种空间共轭曲面问题，分析和评价各种传动装置的几何特性和传动性能，为探索新型的传动装置奠定基础。

The sixth part: Studies on the dynamic changes of soil retention function value of ecosystem in YUYANG District. Utilized ERDAS8. 5 to interpret the remote sensing image and get LUCC data and vegetation information of YUYANG District. Utilized R2V5. 5 to digitize administrative map, topographic map, vegetation picture, soil distribution map and meteorological website map. Utilized ARCINFOR8. 3 to change every digitization layer to the same projection, to generate Tyson polygon, to structure DEM and do vector polygon overlay. Utilized ARC VIE W3. 3 to obtain the grid data topographic slope and slope length from DEM data of YUYANG District, and then, turned every coverage layer into grid layer and do grid polygon overlay to gain data about dynamic changes of value of soil retention of ecosystem in YUYANG District, at last, the author analyzed the features of the spatial-temporal changes and its reason.The seventh part: Studies on the dynamic changes of fixing drifting sand against wind function value of ecosystem in YUYANG District.

第六部分：榆阳区生态系统土壤保持功能价值动态变化研究；利用ERDAS8.5对遥感数据进行解译获得榆阳区土地利用数据和植被信息，利用R2V5.5数字化榆阳区政区图、地形图、植被图、土壤分布图及气象站点分布图，利用ARCINFOR8.3对各数字化图层进行投影转换、泰森多边形生成、DEM构建和叠加分析，利用ARCVIEW3.3从DEM数据中获取榆阳区的坡度、坡长面域数据，并将上述各图层格网化，然后通过栅格图层叠加分析和代数运算获取榆阳区生态系统土壤保持功能物质量和价值量时空动态变化数据，最后分析了其变化的时空特点及形成原因。

along the hairline, one arc-shaped incision about 5 cm in length with a center at the surface projecting point of the sphenoid ridge root, extending from the temples to the point 39 mm anterior to the otobasion superius, is an ideal skin incision via the pterional keyhole approach with intact frontal facial nerve.

以蝶骨嵴根部的体表投影为中心，作起于鬓角，沿发际前缘弧形向下，止于耳上基点前39 mm，位于发际内的长约5 cm的翼点锁孔入路切口，是不损伤面神经的理想切口。

The analysed group consisted of 54 eyes excluding pre-ARC tractional retinal detatchment or neovascular glaucoma, follow-up time less than 3 months. The mean duration of vitreous hemorrhage was 7 months and 3 weeks. The length of follow-up averaged 8.3 months.

除冷冻治疗前即有牵引性视网膜剥离或血管新生性青光眼及追踪时间少於三个月片，共有54只眼睛列入统计分析中；玻璃体出血平均时间为七个月零三周，这踪平均长达8.3个月。

The data, which was obtained by calculation, was imitated and the experiential formula for the relation of the max external pressure resisted under the condition of different ratio between straight section length and the end arc radius on the flatted tube.

并对计算分析取得的数据进行拟和得到了扁管在直边段和圆弧半径的不同比值条件下能承受最大外压力的关系及经验公式。

Analysis and research were made for relation about max external pressure resisting capacity under condition of different ratio between straight section length and end arc radius on the flatted tubes with same circumference and tube wall thickness by using analytical technology of finite element.

应用有限元分析方法，对相同周长、相同壁厚的扁管在直边段和圆弧半径的不同比值条件下与所能承受最大外压力的关系进行了分析。并对计算分析取得的数据进行拟和得到了扁管在直边段和圆弧半径的不同比值条件下能承受最大外压力的关系及经验公式

Nalysis and research were made for relation about max external pressure resisting capacity under condition of different ratio between straight section length and end arc radius on the flatted tubes with same circumference and tube wall thickness by using analytical technology of finite element.

bstract 应用有限元分析方法，对相同周长、相同璧厚的扁管在直边段和圆弧半径的不同比值条件下与所能承受最大外压力的关系进行了分析。

The pulsed power supply used to perform the experiments consisted of three modules storing 800kJ as a driver for an ablation-controlled arc plasma generator. A sequence of tests in which the capillary radius, length and ablated material are varied and in which the capillary power dissipation levels are varied in a certain range are discussed in order to determine the impedance matching between the discharge and the power source.

利用一个总贮能800kJ的模块化电容基脉冲功率源系统为消融控制电弧等离子体发生器强流放电提供电能输入，在一定的参数变化范围内，实验研究了脉冲功率源初始放电参数、等离子体发生器几何参数以及消融材料对消融控制电弧放电特性的影响规律。

One type of blade airfoil with high efficiency of a general axial flow fan is adopted as original airfoil, and it is shortened according to different length scale, and then joined to the exportation circular arc of the original airfoil in the opposite direction. Assuring the streamline on the surface of the blade profile after smooth operation, a new kind of double-head anti-unsymmetrical S model airfoils has been structured to be researched in this paper.

采用一种效率比较高的普通风机叶片翼型作为原始翼型，按不同长度比例缩小原始翼型，反向搭接在原始翼型的出口圆弧处，经过光滑处理，保证叶型表面的流线形后，构成本文所研究的新型双头双机翼反向S型不对称翼型。

Once our foot prints marked a trail on the sand in this beach here, welcoming the gentleness of the seascape; an arc was dragged by the flow of that shoulder-length hair of yours which swept pass my gaze gently and swiftly, at once it turned into innumerable amount of circles.

曾经我们比肩地印下足迹，在这一弯的沙滩上，迎向海景的柔和，那披肩的长发，拖成一道弧，从我凝视的眼帘掠过，顿时圈成无数的圆。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。