Computer ApplicationsIn the last ten years, police have installed speed trap units on many busy roads. These contain a radar set, a microprocessor and a camera equipped with a flash. The radar sends out a beam of radio waves at a frequency of 24 gigahertz. This is equivalent to a wavelength of 1.25 cms. If a car is moving towards the radar, the reflected signal will bounce back with a slightly smaller wavelength. If away from the radar, the waves will reflect with a slightly longer wavelength. The microprocessor within the unit measures the difference in wavelength between outgoing and returning signals and calculates the speed of each vehicle. If it is above the speed pre-set by the police, the camera takes a picture of the vehicle. The information is stored on a smart card for transfer to the police computer. The owner of the vehicle can then be traced using the Driver and Vehicle Licensing Centre database. Some drivers have now got used to these traps. They slow down when they approach one to ensure that the camera is not triggered. They speed up again as soon as they have passed. This is known as “surfing”. One way of outwitting such motorists is a new computerized system. This consists of two units equipped with digital cameras positioned at a measured distance apart. The first unit records the time each vehicle passes it and identifies each vehicle by its number plates using optical character recognition software. This information is relayed to the second unit which repeats the exercise. The microprocessor within the second unit then calculates the time taken by each vehicle to travel between the units. The registration numbers of those vehicles exceeding the speed limit are relayed to police headquarters where a computer matches each vehicle with the DVLC database. Using mailmerge a standard letter is then printed off addressed to the vehicle owner.
Контрольная работа № 4
Вариант 1 1. Перепишите предложения, найдите в них инфинитив и подчеркните его, определите его форму. Письменно переведите предложения на русский язык.
1. The system must tell us if someone tries to get into the system. 2. This sequence causes digitized images to be stored in core memory. 3. The program is not considered to have been used in that time. 4. The importance of mathematics for all sciences is known to be growing rapidly. 5. Your task is to learn the most important steps you can take to secure your Windows-based computer from intrusions. 2. Перепишите предложения, подчеркните инфинитив и определите его функцию. Письменно переведите предложения на русский язык.
1. To put your computer into sleep mode is not a sufficient protection. 2. Your task is to keep your computer up-to-date with the latest Windows security patches and service packs. 3. This software helps to keep your computer secure in several ways. 4. Check the site frequently to download the most recent patches. 5. The signals to represent data exist in your computer as digital signals.
3. Перепишите предложения. Подчеркните в каждом инфинитивный оборот и определите его форму (объектный, субъектный и предложный инфинитивный оборот). Письменно переведите предложения на русский язык. 1. The problem is far too involved for one to be able to solve it. 2. Many free ISPs require you to sign up for the service online. 3. A dial-up connection enables POTS to transport data between your computer and your ISP. 4. Each new communications technology or application seems to require its own standards. 5. The telephone system is expected to connect your telephone to a local switch.
4. Преобразуйте предложения, воспользовавшись инфинитивом или инфинитивным оборотом и словами в скобках, если они даны. Письменно переведите полученные предложения на русский язык.
1. He said: “Never give your home address or phone number”. 2. He did not have much money. He could not afford a licensed software package. (enough) 3. It is important that you should check support line charges. (for) 4. He was the first man who performed this task. 5. I am saving up. I want to buy a new computer.
5. Перепишите предложения, употребив нужную форму прилагательного (much – many, (a)little – (a) few). Письменно переведите предложения на русский язык.
1. … ISPs provide local call access numbers. 2. Very …cars had reversing lights. 3. …of the work of an operating system is hidden from the user. 4. M. Faraday had …chance to get an education. 5… software tools are available today that make it easy to create Web site.
6. Прочтите и письменно переведите текст.
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