伞

In this thesis, the problems, related with research of automatic and precise homing of parafoil system, were analyzed thoroughly and systematically in method of theoretical analysis and numerical simulation, including dynamics, trajectory design and trajectory following.

本文以&实现翼伞系统自主、准确归航&为中心，采用理论分析与数值仿真相结合的方法，对翼伞系统动力学、航迹规划和跟踪控制问题进行了比较系统深入的研究，得到了若干有意义的结论。

The improvements in the IAGA contained adding strengthen operator, improving evaluation index of premature, etc. Multi-phase homing project, making use of the flight properties of parafoil system in gliding and turning, was simple in control and facile in practice. Based on Frenet frame, the linear time-variable error equations of parafoil system were built.

基于Frenet坐标系推导和建立了翼伞系统线性时不变的误差方程，并运用&投影点&的思想来获得Frenet坐标系下偏差量的解析近似表达式，从而设计了用于翼伞系统航迹跟踪的传统PD控制器和增益调节型模糊PD控制器。

Resistance of the wing, lines and pilot as solid bodies blocking the airflow.

伞翼，伞绳和飞行员像固体般堵塞气流产生的阻抗。

It analyzes the effects of the pollution severity and the altitude or atmospheric pressure on the flashover voltage or the flashover gradient. It is shown that FOV is determined by the configuration, and the insul...

结果表明：合成绝缘子的污闪电压与伞裙结构有密切关系；在同样的最短干弧距离下，简单伞形结构的合成绝缘子具有更高的污闪电压和污闪梯度，对于伞形结构复杂的合成绝缘子，虽然其爬电距离提高了，但其污闪电压没有明显提高；高海拔下合成绝缘子的气压影响特征指数n大于瓷和玻璃绝缘子，并受伞裙结构形式、污秽程度的影响，且随着污秽程度增加，n逐渐减小，此外，染污方法和方式对n也有一定影响但不明显。

"Of course," said the umbrella man,"that is - well, you know how these mistakes occur - I - if it's your umbrella I hope you'll excuse me - I picked it up this morning in a restaurant - if it is yours, why - I hope you'll -"

当然，伞主说，那是-好吧，一定误会了-我-如果这是你的伞，希望你原谅我-我今早在一个餐馆里捡的-如果是你的，请你原谅。

"Of course," said the umbrella man—"that is—well, you know how these mistakes occur—I—if it's your umbrella I hope you'll excuse me—I picked it up this morning in a restaurant—If you recognise it as yours, why—I hope you'll—"

&当然，&伞主人说，&嗯……是啊，你知道有时候会发生误会……我……要是这伞是你的我希望你别见怪……我是今天早上在一家饭店里捡的……要是你认出来这是你的，那么……我希望你别……&

"Of course," said the umbrella man—" that is—well, you know how these mistakes occur—I—if it's your umbrella I hope you'll excuse me—I picked it up this morning in a restaurant—If you recognise it as yours, why—I hope you'll—"

&当然罗，&绸伞主人说，&那是，噢，你知道有时会出现这类误会……我……要是这伞是你的，我希望你别见怪……我是今天早上在餐厅捡的……要是你认出是你的，那么……我希望你别……&

Umbrella maker Zhang Xiaoqun, who pedals his wares in a small trolley, says the unique design is his selling point.

用手工做伞的张孝群，都用小型推车运送，而精致耐用的伞是他的卖点。

HI MY factory mainly produces umbrella umbrella grass, pull the non-grass skirts.

我厂主要生产夏威夷伞伞草，拉非草裙。

In the general milling bevel gear with the casting process, the general use of bevel gear cutter, a two-blade or 3 blade into the teeth milling.

在普通铣床上用成型法加工伞齿时，一般都采用伞齿轮铣刀，以两刀法或三刀法将齿铣成。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。