查询词典 four-wheel drive

Over the years various kinds of both bench and stand-mounted countershafts were available: one model of bench countershaft featured a four-step final-drive pulley with a "fast-and-loose" drive from the motor (which gave the effect of a clutch) whist the other dispensed with this arrangement and was driven directly from the motor by what the makers described as a " special joined V-belt ".

多年来各种都替补和备用安装countershafts有：一种模式的板凳副轴功能的四步最后驱动滑轮的"快速和宽松"的电机驱动器惠其他免除这一安排，并直接驱动电机的制造商所形容为"特别加入V带"。

ABSTRACT: A Rockwell PowerFlex7000 Variable Frequency Drive is used in JiuZHou Electric medium voltage drive test bay as the converter. Because of it belong to the current source drive, it has the function of the four quadrant, it can achieve the energy feedbackmake the motor brake,also has the advanced vector control technology, so it can achieve all kinds of load test, there are no other drives can replace it in simulate motor load. PowerFlex7000 drive has ability to achieve the full load test before the drive leave factory.

摘 要：罗克韦尔PowerFlex7000变频器在九洲中压变频实验站测试系统中作为变流逆变器使用，由于本身属于电流源型变频器，具有四象限运行功能，能够实现能量的回馈和对电机的制动，先进的矢量控制技术，可以实现各种复杂多变的负载特性，在模拟电机负载方面起到了其他变频器无可替代的作用，实现了变频器出厂之前的满负荷测试。

Dursley, of number four, Privet Drive, were proud to say that they were perfectly normal, thank you very much.

但是他们最不希望见到的就是任何奇怪或神秘故事中的人物，因为他们对此总是嗤之以鼻。

Four hours' drive away in the larger community of Incahuasi, a health clinic is full of women and children waiting to see a visiting nurse.

在离英加瓦锡较大的居住区四小时车程的地方有一家诊所。里面挤满了候诊的妇女和儿童。

SMD-MC34119 Pinout: C Three External Clock Inputs, Two Multi-purpose I/O Pins per Channel C Double PWM Generation, Capture/Waveform Mode, Up/Down Capability One Four-channel 16-bit PWM Controller One Two-wire Interface C Master Mode Support Only, All Two-wire Atmel EEPROMs Supported One 8-channel 10-bit Analog-to-Digital Converter, Four Channels Multiplexed with Digital I/Os IEEE 1149.1 JTAG Boundary Scan on All Digital Pins 5V-tolerant I/Os, including Four High-current Drive I/O lines, Up to 16 mA Each Power Supplies C Embedded 1.8V Regulator, Drawing up to 100 mA for the Core and External Components C 3.3V VDDIO I/O Lines Power Supply, Independent 3.3V VDDFLASH Flash Power Supply C 1.8V VDDCORE Core Power Supply with Brownout Detector Fully Static Operation: Up to 55 MHz at 1.65V and 85C Worst Case Conditions Available in a 64-lead LQFP Package

SMD-MC34119引脚说明： C款三输入外部时钟，两个多用途I / O引脚每通道双PWM生成，捕获/波形模式，上/下能力的一个四通道16位PWM控制器一两线接口C中间模式支持，只有在所有两线Atmel公司的EEPROM支持的一个8通道10位模拟数字转换器，四通道复用数字I / O的IEEE 1149.1 JTAG边界扫描所有数字引脚5V容限I / O口，其中包括4大电流驱动I / O线，最多一六毫安C镶嵌每个电源1.8V的稳压器，绘图高达100的核心和外部元件 3.3 VDDIO毫安I / O的电源线，独立电源3.3V的VDDFLASH闪光 1.8 VDDCORE核心电源掉电检测与全静态工作：高达55兆赫和85℃时为1.65V最恶劣条件下以64引脚LQFP封装

The method of kinematics analysis for four bar mechanism is used to the kinematics analysis of the roller chain drive,and the simulation of the driving process of the chain drive is carried out by an Windows program Curve of the instantaneous ratio is performed The computer simulation of the kinetic property of the roller chain drive is implemente

铰四杆机构的运动分析方法可用于链传动运动特性的精确分析，采用WINDOWS编程对链传动的运动过程进行了模拟，并对链传动瞬时传动比作出了曲线，实现了链传动运动特性的计算机模拟分析。

Xinji sits about four hours' drive south of Beijing, in the dusty plain of Hebei province. It is typical of China's many fast-emerging cities, driven by the big ambitions of local governments. It is now just as typical of the many Chinese boomtowns that are hitting the buffers. Xinji has suffered badly from falling demand for its clothing exports. By November, most of its factories had closed two months earlier than normal for the spring festival break. Tens of thousands of workers went back to their nearby villages, expecting to return after the holiday. Many won't do so.

辛集坐落在北京南面，离北京四个小时车程，在河北省灰蒙蒙的平原上，它是众多快速发展起来的新兴城市中的一个，被雄心勃勃的地方政府推动，现在也跟其他新兴城市一样，受经济发展放缓的冲击，服装出口需求的降低使辛集遭受重创，在十一月，大多数工厂在春节正常放假前两个月就关门了，千百万工人回到了他们工厂附近的村庄，期待着春节过后能够回到工厂，很多人可能将回不去。

The system of drive are all driven by stepping motors.the machine system design includes every free degrees,computation of drive and transmission system .the third and four degree of freedom are performed by the feed screw having the spline of ball bearing which is design specially for robot .with the textual study,it can be believe the user will have an overall understanding to the way of thinking and steps of the machine system.

在机械系统设计上，对每个自由度驱动、传动系统进行了计算与校核，其中第三四自由度有专为机器人设计的带滚珠花键的丝杠来实现。通过本文的学习，相信使用者会对它的机械系统设计的步骤和方法有一定的了解。

We came away impressed, within the limits that we were able to discover during a four-hour drive.

我们临走留下深刻印象的限度内，我们能够发现在四个小时的车程。

Work is a four-minute drive from my home.

从公司到我家开车只要4分钟。

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。