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At first, the kind of high-speed craft and its current situation are introduced in this paper. Through analyze and compare the characteristics of their performance, three kinds of high-speed craft are selected to be optimized. They are hydrofoil-gliding craft, wave-piercing catamaran and frigate, which power equipment of propulsion system are the common screw, pitch-adjustable screw and water-jet propeller.

本文首先介绍了高速船种类及其推进器的发展现状，通过分析比较各种船型的性能特点，选取了三种典型的高速船(翼滑艇、穿浪艇和护卫舰)并分别以普通螺旋桨、可调距螺旋桨和喷水推进器作为三种船型等动力装置。

The optimization of ship operational speed is essentially a problem of optimizing the speed of a ship in a seaway.

确定船舶最佳营运航速主要是航速的优化问题。

Secondly, according to the related standards of city planning, different standards roads are divided into five grades with different driving speed, which are expressway, trunk road, secondary truck road, branch road and subway. Considering the general situation of Beijing traffic, in this model the minimum value of designed speed is evaluated to each road that in different grade.

然后根据城市规划的相关标准，将不同标准道路分为快速路、主干道、次干道、支路和地铁等5个等级，不同等级的道路赋予不同的行驶速度，考虑北京道路交通的一般状况，模型中各等级道路均取设计速度的最小值，对没有道路覆盖的区域，按照实际情况赋予15km/h的通行速度（表1）。

In practical experiment on a ceramic cylinder gyroscope, it shows that the resonant frequency is quite approximate to the simulated one. A good linear relation of the sense voltage to rotation speed is obtained, which indicates the piezoelectric ceramic cylinder gyroscope is good at the measurement for low and medium rotation speed.

在圆柱型陀螺仪之实验过程中，显示驱动与感测之共振频率几乎为一致；而在旋转实验中得到转速与感测电压拥有良好的线性关系，亦指出该陀螺仪在中低转速下拥有较佳之线性关系。

80C51-based series of motor speed control, can realize the control of motor speed.

详细说明：基于80C51系列的电机速度控制，能实现对电机转速的控制。

The company has the most advanced vacuum cleaner and high-speed series motor production equipment, mainly produce various kinds of smoke and high-speed series motor.

公司拥有最先进的吸尘器及高速串激电机生产设备，主要生产各类吸器和高速串激电机。

In association with the improvement design practices on winding equipment for main cable of large span cable bridges liking Shantou Gulf Bridge, Xiling Yangtse River Bridge and Xiamen Haicang Bridge, some contents are systematically described on the basis of electric control system of ZLC series winding machine for main cable, including mechanism composition of the winding machine for main cable, mathematical relationship between rotation speed of winding system and travel speed of the winding machine, work principle of accurately matching control on the two speeds with PLC and frequency converter, wireless measurement and monitor of winding system tension, automatic override control on cable clamp as well as practical effect of a real bridge application.

结合对汕头海湾大桥、西陵长江大桥和厦门海沧大桥等大跨度悬索桥的主缆缠丝施工设备－主缆缠丝机的改进设计实践，以ZLC系列主缆缠丝机的电气控制系统为基础，系统介绍了主缆缠丝机的机构组成、缠丝系统旋转速度与缠丝机行走速度之间的数学关系、采用PLC及变频器对两速度进行精确匹配控制的工作原理、缠丝系统张力的无线测量、监控、索夹的自动跨越控制以及实桥的应用效果。

The air-speed switch is typically set to close at a speed of about 80 mph (130 km/hr).

空气高速开关通常是一套，收于速度约八〇英里每小时（ 130公里/小时）。

5S-160GP/9T-160 consists of a main case driven by 3-shaft fixed spindle and a rear mounted auxiliary case driven by planet gears. The main case has 5 forward speeds and 1 reverse speed. The auxiliary case has 2 speeds which double the speed of the main case, so that the transmission has 9 forward speeds, the 4 forward speeds of main case shift by ZF-BK short travel synchronizer, auxiliary case shift by lock ring synchronizer, crawler and reverse shift by join sleeve powered by the engine of 280-380 hp.

5S-160GP/9T-160型变速器由三轴传动的主变速器和后置的行星齿轮传动副变速器组成，主变速器有五个前进档和一个倒档，副变速器有两个档位，可将变速器的档位增加一倍，故变速器具有九前一倒档，主变速器4个前进档采用ZF-BK型短行程同步器换档，副变速器采用锁环式同步器换档，爬档和倒档采用接合套换档，用户可根据需要选装部分功率取力器N71 /1或N71/2， N70。

In recent years the power of diesel engine was increased very much because of using the sequence supercharging technology and the ratio of diesel power and gas turbine power was increased largely, from 20% to 61%, so that the top speed gain of the war ship will be 17% higher than the top speed by using only the gas turbine engine.

近年来的相继增压技术的应用使得柴油机低工况的性能大幅度改善，结果是用于联合动力装置的柴油机功率大大提高，与燃气轮机功率的比值已从原来的1：5提高到1：1.64左右，在全速航行时可获得的航速收益达到了17％。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐