查询词典 paraboloidal coordinates

In the first part, first, the operational principle of Varivec Propeller is explained. Secondly, the mathematical model for predicting longitudinal and transverse movement hydrodynamic characteristics of Varivec Propeller under steady or unsteady condition are present, based on the general propeller lifting-surface theory, potential flow theory and Green theorem. Thirdly, theoretical calculation methods for predicting hydrodynamic characteristics when the influence of paraboloidal boss on the performance of Varivec Propeller is or isn't considered are present, based on The finite basic solution method, the unsteady vortex lattice method and Hess-Smith method Different rake angle is adopted according to different desire in practical application.

在理论计算部分，本文首先给出了全方向推进器的工作原理，然后基于常规螺旋桨升力面理论、势流理论和格林定理建立了定常和非定常状态下全方向推进器纵向、横向运动的水动力性能计算的数学模型，并利用有限基本解法、非定常涡格法和Hess-smith方法分别对考虑和不考虑桨毂影响时的全方向推进器纵向、横向运动水动力性能进行了数值预报。

The primary reflector and the secondary reflector of the double-reflecting optical converging primary system are paraboloidal and hyperbolical mirrors, respectively.

所述双反射光学会聚主系统的主反射镜为抛物面镜，次反射镜的反射面为双曲面。

This is the paraboloidal mirror at the bottom of the tube.

主镜。是位于镜筒底部的一块抛物面镜。

As to manufacturing a Φ1800mm, F/1.5 large paraboloidal mirror, three structure models with different thickness of base plate were calculated and analyzed respectively.

以加工Φ1.8m、F/1.5的大口径抛物面主镜为参照，分别对三种结构模型在不同基盘厚度时进行了变形仿真计算。

The distribution of concentrated solar radiation in paraboloidal collectors.

旋转抛物面聚光器焦面能流分布的有限元分析。

An X-band broad bandwidth dual- polarization low side-lobe offset fed paraboloidal reflector antenna is described.

摘 要：介绍了一种宽频带双极化低副瓣天线的设计、加工方法和测试结果。

The experiment of testing a paraboloidal mirror(Φ140、f/2) with designed CGH is depicted and its test result is 0.406λ PV (peak-to-valley), 0.062λ RMS (root-mean-square).

介绍了所设计加工的双计算全息图检测Φ140、f/2凹抛物面反射镜的实验，其检测结果为：PV =0.406λ，RMS =0.062λ。

This paper describes a thermal cycling test in vacuum of antenna paraboloidal reflector, small model and specimen, made of two carbon fibre sheets and one aluminum honeycomb core and gives the approach for predi- cting the permanent distortions.

本文介绍了碳布铝蜂窝制成的天线反射器、小模型及其材料的真空冷热循环试验和永久变形的预示方法。

The half paraboloidal IRA is easy to match UWB pulse generator. The principle and radiation field of IRA is discussed with field on the spherical surface aperture.

抛物面冲击脉冲辐射天线是一种新概念的超宽带电磁脉冲辐射天线，它包括抛物面反射器、TEM馈臂和匹配电路等，半抛物面冲击脉冲辐射天线解决了与源的匹配和连接问题。

In the first part, a novel paraboloidal lensed multimode fiber has been analyzed amply in the coupling between the high power single emitter broad area diode laser and multimode fiber, which has been verified in the experiment. In the second part, the coupling between the high power single emitter broad area diode laser and cylindrical lensed multimode fiber has been discussed detailedly.

主要通过计算机仿真抛物面型光纤微透镜和柱状楔形光纤微透镜与大功率宽发射域半导体激光器的多模光纤耦合效率，并在实验中进行验证，提出了提高大功率宽发射域半导体激光器与多模光纤耦合效率的新方法。

Connectors are lines that can be anchored to particular places, called glue points , on the graphic object.

连接符，可固定在图形对象的特定的地方的线条。

Another way of putting it, too many agents have a say in each other's work, and bureaucratic rigor mortis sets in.

另一种表达是，太多的作用物在彼此的工作里都有话语权，官僚的僵尸开始抬头。