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We hope that the results in this thesis will be helpful to the designing of high-speed switches and routers.

本文内容对实际设计一个高速交换机或路由器具有一定的指导意义。

Guy switches between six and twelve string guitars and lays down rootsy acoustic rhythms for Wells' tasteful harmonica lines.

盖开关六至十弦吉他，并规定了威尔斯的品位口琴声线rootsy节奏。

To Medium decorative standards as an example : bathrooms with tile paving Daily; Bathrooms ceiling PVC Kouban do drop; Kitchen ceiling brush Fangci paint; Interior walls spray coat paint, ceilings white Naicaxi paint brush; 1 metre wooden Qiangqun living room so that the ground floor corridor at arms; Shop wooden floor bedroom, installing wood or wood decoration hanging mirrors line line-Longwood Chuanglianhe, Double sets of doors kits; of the window and aluminum alloy Tuilachuang, balcony sealed aluminum alloy windows; lamps used Xiding circular art lights to pull switches.

以中等装饰标准为例：卫生间用瓷砖铺地贴墙；卫生间顶棚PVC扣板做吊顶；厨房天花板刷仿瓷涂料；室内墙面喷多彩涂料，天花板刷白色耐擦洗涂料；客厅做1米左右木墙裙，地面走廊铺通体砖；卧室铺木地板，安装木挂镜线或木装饰线，通长木窗帘盒，双包木门套；内窗加铝合金推拉窗，阳台封铝合金窗；灯具用吸顶环形艺术灯，改拉线开关等。

Panel mounted devices that may be handled in normal operation, such as switches and rheostats, are staked or otherwise prevented from rotating.

装在板面上的设备可以在正常运作中进行操作，如交换机和变阻器铆合的情况下。否则，设备将不能运转。

Panel mounted devices that may be handled in normal operation, such as switches and rheostats, are staked or otherwise prevented from rotating.

仪表盘安装装置可以在正常操作下处理，比如开关和可变电阻器，用桩支撑或者用别的方法阻止旋转。

They also come with many unique features such as reverse switches for jams, automatic restarts and reusable blades.

他们也有许多独特的功能，如扭转开关堵塞，自动重新启动和可重复使用的刀片。

In our life, especially in mechanics and engineering sciences, there are many nonsmooth phenomena. For example, the noise of a squeaking spoon in a bowl, or the chattering of machines, the grating of brakes, the percussion of drilling machines, the switches of auto-controller, the oscillation of crystal, etc.

在我们生活中，特别是在力学和工程技术领域，经常会遇到非光滑现象：比如勺子在碗里刮擦时发出刺耳的噪声，或者机器的振动、刹车的摩擦、打孔机的冲击、自动控制器的转换以及晶体的振荡等等。

Based on the analysis of traditional converters, a novel circuit is proposed, what it defers from traditional two switches/phase converter is that it has not dump resistance, and that the rise time and falling time of the phase currents can be effectively reduced, and the torque and output power performance of the system is improved .

该文的研究目的在于设计开关磁阻电机并通过对控制理论在SRD系统中的应用进行深入的分析、发展和创新，在保证SR电机的固有优点前提下，改善或消除其存在的缺点，提高系统的性能，逐步开始出相应的产品，进而推广SR电机的应用。

Based on the analysis of traditional converters, a novel circuit is proposed, what it defers from traditional two switches/phase converter is that it has not dump resistance, and that the rise time and falling time of the phase currents can be effectively reduced, and the torque and output power performance of the system is improved.

在分析了常用的功率变换电路基础上，提出了一种基于双开关功率变换电路的改进电路，该电路与常规双开关功率变换电路的区别在于不需要能耗制动电路，能够利用关断相绕组中储存的能量有效缩短相电流的建立和关断时间，改善SR电机高速运行时输出转矩下降和转矩脉动严重的问题，并且电机的输出功率也得到提高。

The thesis mainly researches on the single phase AC/AC converter in the topologies including AC_Buck and AC_Cuk. Firstly, the operating principles of the two converters are analyzed in detail and the rules of their parameters design are educed; The commutation of their power switches which is the key of these topologies to realize is analyzed in detail and a feasible solution which can be named RCD-Commutation mode is presented and proved effectual by theory analyses and simulation results.

本文首先分析了AC_Buck变换器的变换原理，得出了电路参数设计准则；继而对电路实现的难点即功率管换流问题进行了深入分析，并得出了一种可行的解决方案即RCD换流方案；作为对简单拓扑单相直接AC/AC变换器控制策略的探索，本文以AC_Buck为平台，对电压单闭环瞬时值控制方案进行了研究，在理论分析和仿真研究的基础上设计并制作了一台采用RCD换流、电压单闭环瞬时值控制的AC_Buck变换器原理样机。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。