查询词典 drive at

If you drive a car, drive at a steady speed.

如果你开车，那就保持一个平稳的速度。

Here you jump on board a four-wheel drive at sunrise and drive out in the bush for several hours.

踏上一辆四轮驱动越野车，在日出前，要花几个小时才能进入真正的荒野灌丛。

State-of-the-art about harmonic motion drive and active teeth drive at foreign and home is simply reviewed. Merits and faults are analyzed according to their structural compositions and features of drive.

文章简要地回顾了谐波齿轮传动和活齿传动的国内外发展现状，根据它们的结构组成及传动特点。

The thesis contains five chapters. The first chapter summarizes the development and research of switched reluctance drive, discusses the main research direction, and explains the main work in this paper. In chapter 2, hardware system which includes the design of power converter and various control circuit is discussed. TMS320LF2407 DSP is used to design the hardware circuits of SRM control system, and design details including the current detection, position sensing, fault protection, speed detecting, keyboard and display etc. are provided. Because of the full use of the abundant peripheral resources of DSP, it comes to the aim simplifying the circuit structure and heightening the reliability. In chapter 3, the application of neural network on SRM control system is introduced, a new the application of neural network and the method of sampling is proposed and a simulation system based on Matlab/Simulink is established. Chapter 4 discusses the routine designing issue. Because the modularized programming method is adopted, and multi-interrupt processing technique is used, operation efficiency of the control software is highly raised. At last, the foregoing SRM control system is tested. Speed adjustment is realized, and other targets on the research and design of SRM control system are reached, which establishes a good foundation for further research.

本文共分五章，第一章概述了开关磁阻电机调速系统(Switched Reluctance Drive，简称SRD)及其发展和研究现状，论述了其主要研究方向，并说明了本文的主要工作；接下来的一章主要讨论了SRM的硬件系统，主要包括功率变换器的设计和各种控制电路的设计，本文以TMS320LF2407为核心设计了开关磁阻电机控制系统硬件电路，给出了包括电流检测、位置检测、故障保护、测速电路及键盘和显示电路等部分电路的详细设计，充分利用了DSP的丰富外设资源，达到了简化电路结构、提高运行可靠性的目的；第三章介绍了人工神经网络在开关磁阻电机控制系统中的应用，提出了一种新的应用方式(利用GPFN神经网络调节PI参数)以及如何采取样本，搭建了基于Matlab/Simulink的仿真系统；在第四章中，讨论了开关磁阻电机控制软件的设计，采用模块化编程方法，采用基于多中断的控制程序，提高了控制软件的效率；最后，对所设计的开关磁阻电机控制系统进行了实验，实现了电机调速，达到了开关磁阻电机控制系统研究和设计的预期目标，为更近一步研究打下了基础。

Fal.But, as ill luck would have it, three misbegotten knaves,in Kendal green,came at my back,and let drive at me;—for it was so dark, Hal, that thou couldst not see thy hand.

福斯塔夫可是偏偏魔鬼跟我捣蛋，三个穿草绿色衣服的杂种从我的背后跑了过来，向我举刀猛刺；那时候天是这样的黑，哈尔，简直瞧不见你自己的手。

There is also usually a lock for the higher speed, so if you have a young preschooler who is not ready to drive at 5 mph, you can lock the vehicle so that it won't allow your child to go at that speed.

通常也有一个较高的速度锁，所以如果你有一个年轻的学龄前儿童谁没有准备好，以推动在5英里，你可以锁定车辆，以便它不会让你的孩子去那个速度。

At a drive-through, with seconds to spare, it's a washout.

在drive-through如果多花几秒钟，对很多人来说，那都将是种损失。

In June, Garfield was invited to speak at a Boston seminar for marketers on how to use the Web more effectively. A short video of the event, posted on her blog, captures the professionals laughing at her wisecrack 俏皮话 about the benefits of a man who can still drive at night.

今年6月， Garfield 受邀请在波士顿的一个专题为"开发市场人士如何更有效地利用互联网"的讨论会上发言，会议的小段视频放在她的博客网上，有关于"晚上还在驾车的男人有啥好处"的俏皮话，引得专家也哈哈大笑。

The working family with most to gain from the budget may be the one living at 24 Sussex Drive, the prime-ministerial residence.

大部分工薪家庭都从财政预算中受益，他们或许就是和总理一样都居住在24 sussex drive的居民。

Thirdly, by con-utilaziont of many methods such as exploitation and geology, dynamic producing process monitoring, water invasion behavior, core analyis and numerical simulation, 10 kinds of reservoir scale remaining oil distribution pattern in the steam huff and puff super heavy crude oil reservoir was put forward. Also, remainling oil distribution in the sand bed scale and sublayer scale were pointed out.Fourthly, Microcosmic displacement experiment was conducted for hot water driving in 100℃and 120℃. and steam drive at 170℃condition. Microcosmic remaining oil distribution characteristics were summarized. Remaining oil microcosmic distribution by steam drive at 170℃is different from that at 100℃, 120℃hot water driving. After the steam drive, there are three types of remaining oil distribute regular pattern, whic is impacted by many affecting factors like pore configuration, wettability and interfacial tension.

分析了砂层组规模和小层规模的纵向和平面剩余油分布规律。4、通过微观驱替实验，研究了100℃和120℃的热水驱及170℃蒸汽驱条件下剩余油的微观分布形态。170℃条件下剩余油微观分布形态同时受孔隙结构、润湿性及界面张力多种因素的影响，主要有三种形式：在油、汽、水三相共存的孔隙中，剩余油分布于汽、水之间，为薄膜状和弯月状；在只有油、汽两相共存的孔隙中，大孔道中主要是蒸汽，剩余油在细小的孔喉和孔隙角隅处以段塞或不规则状态存在；由于高温水蒸汽对原油具有萃取作用，剩余油以一种细小的珠滴状存在于孔隙表面。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。