行驶

As a car races forwards it punches a hole in the air as it goes along, and after the car has gone past the displaced air rushes in to fill the gap.

当一辆车向前行驶时，在空气中冲出一个空洞。在这辆车的身后，被挤开了的空气快速地填补这个空隙。

And that full tank of air will allow the car to travel for 200 kilometers before it needs to be refueled.

而且加满空气后，汽车能在再次加气前行驶 200 公里。

But in fact, the system of half-tracked air-cushion vehicle is over complicated. When the vehicle drives in an unknown soil, the parameters and structures of controlled member will change with load or disturbances. This system is nonlinear and time-variant, and it is very difficult to analyze its transfer function and state function quantitatively.

然而在实际工作中，由于本课题中的系统过于复杂，当行驶在未知土壤条件下时，被控对象往往随着载荷或干扰因素影响，其特性参数或结构发生改变，属于非线性和时变性的不确定系统，它的传递函数或状态方程难于用传统的定量分析方法加以实现。

In this paper the dynamics characteristics are analyzed theoretically at first. According to the unique configuration and mechanics characteristics, the mechanics model and kinetic differential equation of the half-tracked air-cushion vehicle are established. Algorithm of mechanics and lifting-state parameters are put forward and analyzed. And variation ranges of the driving state parameters are obtained and the corresponding influence factors are analyzed. The further qualitative studies on control model are carried out.

因此，本文首先从理论上分析了半履带式气垫车的动力学特性，根据半履带式气垫车的独特结构和力学特性，建立了半履带式气垫车的力学模型和相应的运动微分方程，提出并分析了在纵摇与升沉运动时，半履带式气垫车的力学参数和垫升状态参数的计算方法，得到了在行驶过程中各运行状态参数的变化规律，并分析了相应的影响因素，进而对控制对象模型进行了定性研究。

Up to 48 per cent of students have their own vehicle, an Alamo Rent A Car survey revealed. And 79 per cent travel over 100 miles a week, compared with 64 per cent last year.

多达48%的学生拥有自己的私人机动车，其中79%的学生每周行驶距离超过100英里，与去年的64%相比有明显增加。

The artide introduces the toe-in,propulsion angle,steering axle inclination and caster of four-wheel aligner and theirs influence to vehicle stability.

综述四轮定位的前束值、推进角、主销内倾角、主销后倾角等参数对汽车行驶性能的影响。

"Look out!" squawked Mrs. Mallard, all of a dither.

"看着点！"麦乐夫人惊叫道，"你超速行驶！"

In Yarmouth I was put on the long-distance coach to London, and travelled all through the night.

在雅茅斯我被送上一辆去伦敦的长途四轮马车，行驶了一整夜。

This model is designed for the all-weather fisherman, for day trips and overnight cruising.

这种模式是专为全天候渔民，为一日游和通宵行驶。

Parts of Interstate 70 and the Pennsylvania Turnpike between New Stanton and Allegheny Valley -- especially the truck lane ...

部分州际70和宾夕法尼亚州之间的正常行驶，新斯坦顿和阿勒格尼谷-尤其是卡车里。

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。