Переведите предложения, содержащие всевозможныеформы причастий: Participle I, Participle II, PerfectParticiple Active и Perfect Participle Passive.

1. Electromechanical memories depend upon moving mechanical parts for their operation. 2. The time required for the computer to locate and transfer data to and from a storage medium is called the access time. 3. Being not visible software makes possible the effective operation of computer system. 4. Having invented magnetic tapes the Germans used them as the secondary storage medium. 5. When properly programmed computers don't make computational errors. 6. Having been introduced in the early 1960s magnetic disc storage has replaced magnetic tape storage. 7. The control unit interpreting instructions is one of the important parts of any computer system. 8. Data recorded in the form of magnetized dots can be arranged to represent coded patterns of bits. 9. As contrasted with magnetic tapes magnetic discs can perform both sequential and random processing. 10. While having no moving mechanical parts electronic memories can transfer data at very high speed.

13. Выполните письменный перевод текста по вариантам.

 

DIGITAL COMPUTER OPERATION

1. A digital computer is a machine capable of performing operations on data represented in digital or number form. The individual operations performed by a digital computer are very simple arithmetic or logical processes involving the manipulation of the bits in words or characters of information. The great power of any digital computer rests in the ability to store large volumes of data and to perform these operations at extremely high speed.

In most electronic digital computers the method of number representation is based on the system of binary notation. The binary notation system is most widely used because of the convenience in constructing logical circuits and storage devices capable of handling data in this form. For example, a magnetic memory unit consists of many thousand individual magnetic cells, each of which can be energized in either of two ways to represent the binary digits 0 or 1. If these cells are grouped to form words or binary coded characters, information can be stored for processing in units of specified size. In the same way, digital data can be recorded as a series of magnetized spots on a magnetic tape or a magnetic disk.

2. The computer has pervaded most fields of human activity and is the most important innovation of our age. Bornout of the technology of communication, it is capable of handling enormous amounts of information at tremendous speeds. What makes it so potent is the fact that a single mechanism can perform any information-processing task. The same mechanism can control industrial processes, guide space vehicles or help to teach children. This diversity of tasks is made possible by the simple idea of the stored program.

A program is the enumeration of determining commands. It specifies the method used for the solution of a problem in detail. When the machine is in operation, both the commands and the numbers to be processed are constantly being taken out of and put into a depository of information known as a memory.

It can be seen that the processes performed by a digital computer are essentially simple. These operations can be performed at extremely high speeds and with a high degree of coordination between the different functional units of the hardware system, and this ability means that digital computers can undertake highly complex tasks.

14. Прочтите внимательно текст. Составьте на английском языке план текста, выделив основные его темы. План можно составить в вопросной, назывной или тезисной форме. Познакомьтесь с образцами планов, представ­ленными после текста; сравните со своим планом.

 

MEMORY

It is interesting to note that memory, one of the basic components of the computer, is often called storage. It stores calculation program, the calculation formulae, initial data, intermediate and final results. Therefore, the functions of the computer memory may be classified in the following way. Firstly, the computer memory must store the information transmitted from the input and other devices. Secondly, memory should produce the information needed for the computation process to all other devices of the computer.

Generally, memory consists of two main parts called the main, primary or internal, memory and the secondary, or external memory. The advantage of the primary memory is an extremely high speed. The secondary memory has a comparatively low speed, but it is capable of storing far greater amount of information than the main memory. The primary storage takes a direct part in the computational process. The secondary storage provides the information necessary for a single step in the sequence of computation steps.

The most important performance characteristics of a storage unit are speed, capacity and reliability. Its speed is measured in cycle time. Its capacity is measured by the number of machine words or binary digits. Its reliability is measured by the number of failures (отказ) per unit of time.

План в вопросной форме.

1. What is memory?

2. What is the function of memory?

3. What are the main parts of memory?

4. What are advantages and disadvantages of a storage unit?

5. What are their functions?

6. What are performance characteristics of the main and secondary memory?

7. What units are performance characteristics measured by?

План в назывной форме

1. The definition of memory.

2. The main functions of memory.

3. Classification of memory.

4. Advantages and disadvantages of memory components.

5. The functions of memory components.

6. Performance characteristics of memory.

7. The units for measuring the performance characteristics of memory.

План в тезисной форме.

1. Memory is one of the basic components of the computer.

2. Memory stores initial data, intermediate and final results.

3. It produces the information needed to other devices of the computer.

4. Memory consists of the main (internal) and the secondary (external) storage.

5. The main memory has high speed, but small capacity; the secondary memory possesses lower speed but greater capacity.

6. The main memory performs computation; the secondary memory provides information sequentially, step by step.

7. The performance characteristics — speed, capacity and reliability — are measured by cycles, binary digits and the number of failures per unit of time.

TESTS

1. Вставьте вместо пропусков необходимые слова.

1. The time required for the computer to locate and transfer data in the storage device is called the data time.

a) sequence; b) access; c) value

2. memories have no moving parts.

a) electronic; b) mechanical; c) electromechanical

3. Magnetic were the main elements used for pri-
mary memory in digital computers for many years.

a) cores; b) tapes; c) disks

4. ____is more commonly used for memory at present.

a) bipolar semiconductor; b) MOS; c) field-effect transistor

5. Magnetic disks constitute the_________storage media.

a) internal; b) primary; c)secondary

6. Data are stored in codes in primary as well as in secondary storage.

a) digital; b) binary; c) numerical

7. Data access time is in electronic memories than

that in electromechanical memories.

a) longer; b) much longer; c) shorter

8. Electronic memories have capacities for data stor-
age.

a) more; b) larger; c) less

 

2. Согласуйте слова левой колонки с их интерпретацией, предложенной справа.

1. Primary a) one of the performance characteristics of storage measured in binary digits;

2. Secondary b) memory that has random access to the information;

Magnetic disc c) combination of units of information;

Binary codes d) the main method of secondary storage performing both sequential and random storage;

5. RAM e) area of memory where protected programs can be read from but not written on;

6. Bit f) a fixed number of consecutive bits representing a character;

7. Byte g) the principal flexible second storage circuit element;

8. ROM h) part of memory having lower speed but greater capacity;

9. Floppy i) a unit of information or binary digit;

10. Capacity j) the most expensive part of memory having the least capacity and the fastest access time.

 

UNIT 6

CENTRAL PROCESSING UNIT

 

1. Ознакомьтесь с терминами текста 1.

central processing unit (CPU) — центральный процессор (ЦП)

interchangeably — взаимозаменяемым

образом precisely — точно

internal memory — внутренняя память; внутреннее ЗУ

activity — деятельность; работа; действия операции

to issue — посылать (сигнал); выводить, выдавать (сообщение)

response — ответ; отклик; реакция; отвечать; реагировать

to interprete — интерпретировать; истолковывать;

according to — согласно; в соответствии с

level — уровень; степень; мера; выравнивать

input-output port — порт ввода-вывода

control unit (CU) — устройство управления

arithmetic-logical unit (ALU) — арифметико-логическое устройство

switch — переключатель; коммутатор; переключать; переходить

direct— направлять; адресовать; указывать; прямой; непосредственный

step-by-step operations — пошаговые операции

to select — выбирать; выделять (на экране)

on the other hand — с другой стороны

exponentiation — возведение в степень

call for — требовать; предусматривать

to load — загружать; выполнять загрузку

 

2. Прочтите текст и скажите, какой компонент составляет сердце компьютерной системы и в чем заключается его функция.

 

Text 1. CENTRAL PROCESSING UNIT

It is well known in computer science that the words 'computer' and 'processor' are used interchangeably. Speaking more precisely, 'computer' refers to the central processing unit (CPU) together with an internal memory. The internal memory, control and processing components make up the heart of the computer system. Manufactures design the CPU to control and carry out basic instructions for their particular computer.

The CPU coordinates all the activities of the various components of the computer. It determines which operations should be carried out and in what order. The CPU controls the opera­tion of the entire system by issueing commands to other parts of the system and by acting on responses. When required it reads information from the memory, interprets instructions, performs operations on the data according to the instructions, writes the results back into the memory and moves information between memory levels or through the input-output ports.

In digital computers the CPU can be divided into two functional units called the control unit (CU) and the arithmetic-logical unit (ALU). These two units are made up of electronic circuits with millions of switches that can be in one of two states, either on or off.

The function of the CU within the central processor is to transmit coordinating control signals and commands. The control unit is that part of the computer that directs the sequence of step-by-step operations of the system, selects instructions and data from memory, interprets the program instructions, and controls the flow between main storage and the arithmetic-logical unit.

The ALU, on the other hand, is that part of the computer in which the aetual arithmetic operations, namely, addition, subtraction, multiplication, division and exponentiation, called for in the instructions are performed.

Programs and the data on which the CU and the ALU operate, must be in internal memory in order to be processed. Thus, if located in secondary memory devices, such as disks or tapes, programs and data are first loaded into internal memory.

 

3. Просмотрите текст еще раз. Ответьте на вопросы, используя информацию текста.

1. What words in computer science are used interchangeably and why? 2. What components make up the heart of the computer system. 3. What is the function of the CPU? 4. In what way does the CPU control the operation of the whole system? 5. Name the sequence of operations the CPU performs (use five verbs). 6. What are the CPU functional units made of? 7. What is the function of the CU? 8. What operations are performed in the ALU? 9. Where are data processed? 10. Where are data to be processed loaded into?

 

4. Найдите в тексте английские эквиваленты следующих словосочетаний:

Хорошо известно; к компьютеру относятся; внутренняя память; составлять суть; выполнять; координировать деятельность; определяя в каком порядке; управлять работой всей системы; при необходимости; в соответствии с командами; уровни памяти; порт ввода-вывода; переключатели; режим включения или выключения; передавать сигналы; указывать последовательность пошаговых операций; основная память; управлять ходом выполнения программы; с другой стороны; выполнять вычитание, сложение, возведение в степень, деление, умножение; для того чтобы.

5. Вспомните значение новых слов и попытайтесь перевести словосочетания, употребляемые с этими словами.

Direction: backward direction; clockwise direction; counterclockwise direction; data direction; forward direction; inverse / reverse direction; negative direction; positive direction; printing direction; transmission direction.

Level: access level; application level; data level; device level; difficulty level; error level; function level; hardware level; high level; input level; output level; performance level; presentation level; program level; protection level; resource level; security level; software level; structural level; system level; transmisson level.

Processor: arithmetic processor; central processor; command processor; control processor; data processor; error processor; general-purpose processor; special-purpose processor; image processor; language processor; mail processor; message processor; numeric processor; parallel processor; peripheral processor; text processor.

Switch: to switch between programs; to switch between windows; to switch disks; to switch on; to switch off; to switch over; binary switch; command switch.

Step: conversion step; final step; procedure step; program step; programming step; step by step; one step at a time; to step down; to step out; to step up; to take steps.

6. Переведите предложения, содержащие независимый причастный оборот.

1. Data being accessed randomly, semiconductor memories are called random access memory (RAM). 2. The information capacity of a single bit being limited to two alternatives, codes are based on combination of bits. 3. Primary storage having similarity to a function of the human brain, the storage is also called memory. 4. An electron leaving the surface, the metal becomes positively charged. 5. Computer system architecture being organized around the primary storage unit, all instructions must pass through it. 6. Computer system architecture is organized around the primary storage unit, all instructions passing through it.

7. Electromechanical memories depend upon moving mechan ical parts, their data access time being longer than is that of electronic memories,. 8. For this reason most computer systems use electronic memory for primary storage;electromechanical memory being used for secondary storage. 9. Large capacity tape devices are used with large data processing systems, cassettes aftd cartridges being applied with small systems. 10. The CPU controls the operation of the entire system, commands being issued to other parts of the system.

 

7. Ознакомьтесь с терминами текста 2.

to manage — управлять; организовывать; справляться

to obtain — получать; достигать; добиваться

to cause — заставлять; вынуждать; вызывать; быть причиной; причина, основание

flow — поток; ход (выполнения программы); последовательность

counter — счетчик

register — регистр; устройство регистрации; счетчик; датчик

instruction register — регистр команд

storage register — регистр памяти; запоминающий регистр

address register — адресный регистр

temporarily — временно

decoder — дешифратор

operand address — адрес (хранения) операнда

mark — отметка; маркер; знак; помечать; обозначать; выделять

timing mark — отметка времени

accumulate — накапливать(ся); суммировать; собирать(ся)

accumulator — сумматор; накапливающий регистр; устройство суммирования compare [кэт'реэ] — сравнивать; соотноситься

comparer — компаратор; устройство сравнения

content — содержимое; смысл; объем; количество

involve — включать; содержать; заключать (в себе)

core — суть; основная часть; ядро; оперативная память

add — складывать; суммировать; прибавлять; присоединять

added — добавочный; дополнительный

adder — сумматор; блок суммирования

at least — по крайней мере

 

8. Прочтите текст и скажите, о каких компонентах цент­рального процессора и их назначении вы узнали. Переведите текст.

Text 2. THE CPU MAIN COMPONENTS

As it is known the two functional units of the CPU are the control unit (CU) and the arithmetic-logical unit (ALU). The control unit manages and coordinates the entire computer system. It obtains instructions from the program stored in main memory, interprets the instructions, and issues signals that cause other units of the system to execute them.

The control unit operates by reading one instruction at a time from memory and taking the action called for by each instruction. In this.way it controls the flow between the main storage and the arithmetic-logical unit.

The control unit has the following components: a counter that selects the instructions, one at a time, from memory; a register that temporarily holds the instructions read from memory while it is being executed; a decoder that takes the coded instruc­tion and breaks it down into individual commands necessary to carry it out; a clock, which produces marks at regular intervals. These timing marks are electronic and very rapid.

The sequence of control unit operations is as follows. The next instruction to be executed is read out from primary storage into the storage register. The instruction is passed from the storage register to the instruction register. Then the operation part of the instruction is decoded so that theproper arithmetic or logical operation can be performed. The address of the operand is sent from the instruction register to the address register. At last the instruction counter register provides the address register with the address of the next instruction to be executed.

The arithmetic-logical unit (AL U) executes the processing operations called for by the instructions brought from main memory by the control unit. Binary arithmetic, the logical operations and some special functions are performed by the arithmetical-logical unit.

Data enter the ALU and return to main storage through the storage register. The accumulator serving as a register holds the results of processing operations. The results of arithmetic operations are returned to the accumulator for transfer to main storage through the storage register. The comparer performs logical comparisons of the contents of the storage register and the accumulator. Typically, the comparer tests for conditions such ts "less than", "equal to", or "greater than".

So as you see the primary components of the arithmetic-logical unit are banks of bistable devices; which are called registers. Their purpose is to hold the numbers involved in the calculation and hold the results temporarily until they can be tranferred to memory. At the core of the ALU is a very high-

Primary storage speed binary adder, which is used to carry out at least the four basic arithmetic functions (addition, subtraction, multiplication and division). The logical unit consists of electronic circuitry which compares information and makes decisions based upon the results of the comparison.

 

9. Ответьте на вопросы, используя информацию текста.

1. What are the functional units of CPU? 2. What is the function of CU? 3. How does CU operate? 4. What is the function of a counter? 5. What role does a decoder play? 6. What is the sequence of CU operations? 7. What is the function of the arithmetic-logical unit? 8. What operations are performed by ALU? 9. What primary components does ALU consist of? 10. What is the function of an accumulator / comparer?

10. Найдите в тексте английские эквиваленты следующих словосочетаний:

Функциональные блоки; устройство управления; арифметико-логическое устройство; управлять работой всей системы; получать команды; основная память; посылать сигналы; считывать команды поэтапно; таким образом; временно сохранять информацию; производить пометки через равные промежутки времени; последовательность операций; регистр памяти; регистр команд; адресный регистр; счетчик; датчик; дешифратор; адрес операнда; адресный регистр, высокоскоростной двоичный сумматор; по крайней мере; вычитание; сложение; умножение; деление; принимать решения; результаты сравнения.

 

 

11. Вспомните значение новых слов и попытайтесь перевести словосочетания, употребляемые с этими словами.

Counter: binary counter; character counter; data counter; instruction counter; pulse counter; sequence counter; storage counter; software counter; time-out counter.

Selection: color selection; directory selection; drive selection; file selection; function selection; keyboard selection; menu selection; security selection.

Register: address register; base register; clock register; command / instruction register; counter register; CPU register; hardware register; input / output register; memory register; operand register; general-purpose register; special-purpose register.

Management, data management; database management; disk management; error management; information management; memory management; network management; resource management; task management; window management.

 

 

12. Найдите в текстах 1 и 2 слова, близкие по значению следующим:

Verbs: to work; to control; to receive; to keep; to send; to perform; to demand; to choose; to supply; to pass; to name; to include; to apply; to come back; to found; to explain; to form; to define; to arrange.

Nouns: computer; answer; commands; memory; element; device; information; state; aim; heart; solution; computation.

Adjectives: main; whole; separate; quick; correct; large; main (storage); following; every; following; specific; different; real.

 

13. Сравните и проанализируйте предложения, содержащие зависимый и независимый причастные обороты.
Переведите их.

1. Having returned to the accumulator the results of arithmetic operations are transferred to main storage. The results of arithmetic operations are returned to the accumulator, the storage register transfering them to main mamory. The results of arithmetic operations being returned to the accumulator, the storage register transfer them to main memory. Being returned to the accumulator the results of arithmetic operations are transferred to main memory.

2. When passing through a conductor free electrons form an electric current. Free electrons passing through a conductor, an electric current is generated. Free electrons pass through a conductor, an electric current being generated. Free electrons passing through a conductor form an electric current.

3. Instructions being obtained, the control unit causes other units to perform the necessary operations. Instructions are obtained, the control unit causes other units to perform the operations. Having obtained the instructions the control unit causes other units to perform the operations. Obtaining the instructions the control unit causes other units to perform the operations.

4. The elements having unknown properties cannot be used for experiments. The elements have unknown properties, experiments with these elements being impossible. Having unknown properties the elements cannot be used for experiments. The elements having unknown properties, experiments with them are impossible.

5. When moving in a material charged particles (заряженные частицы) produce magnetic properties (свойства) of this material. Charged particles moving in a material produce magnetic properties. Charged particles moving in a material, magnetic properties of this material are produced. Charged particles move in a material, magnetic properties of the material being produced.

 

14. Прочтите внимательно текст и составьте к нему план в назывной форме. Прочтите текст еще раз, разверните пункты плана и составьте реферат на английском языке, озаглавьте текст.

 

It is known that one of the fundamental parts of the computer is a control unit. This unit controls the computation process automatically, without man's participation. It sends signals to all other parts of the computer to specify what they must do. First of all, the control unit tells the main memory what data must be transferred to the arithmetic-logical unit and other devices. Then it enables the arithmetic-logical unit to perform the required operation. Finally, it places the obtained results in the main memory.

It is important to note that the control unit operation is determined by an algorithm of a problem solution. The algorithm is a sequence of arithmetic and logical operations. These operations must be performed on the initial data for solving the problem.

Description of an algorithm in a form acceptable by a computer is called a program. A program is a list of sequential computer instructions enabling a computer to solve a problem. In order to be acceptable by the computer instructions must be encoded into a digital form.

In conclusion it should be pointed out that the main feature of a computer is automatic control of the problem solution process. It is based on the programmed-control principle.

 

15. Выполните письменный перевод текстов по вариантам. Озаглавьте тексты.

 

1. In 1960's advances in microelectronic componenfs led to the development of the minicomputer, followed more recently by an even smaller microcomputer. Both have filled a need for small but relatively flexible processing systems able to execute comparatively simple computing functions at lower costs.

In 1971 Intel Corporation delivered the first microproces­sor, the 4004. All the logic to implement the central processing unit of a tiny computer was put onto a single silicon chip less than 1/4 inch square. That design was soon followed by many others. The progress toward smaller computers is continuing, designers are working at nano-computers and pico-computers.

When the central processing unit of a computer is implemented in a single, or very small number of integrated circuits, we call it a microprocessor. When a computer includes a microprocessor as its major component, such device is called a microcomputer.

Today the hardware in data-processing machines is built out of microelectronic devices. Advances in microelectronic devices give rise to advances in data-processing machinery.

2. The computer has made it possible to mechanize much of the information interchange and processing that constitute the nervous system of our society.

The versatility and convenience of the microprocessor has changed the entire architecture of modern computer systems. No longer is the processing of information carried out only in the computer's central processing unit. Today there is a trend toward distributing more processing capability throughout a computer system, with various areas having small local processors for handling operations in those areas.

There are a number of advantages of distributed processing. First, since many elements of the computer can be working on different portions of the same task, the work may be done faster. Second, if one element in the network malfunctions, its workload can be shifted to another element or shared among several elements, so that the entire work is relatively immune to failure. Third, the network can be small enough to be contained within a single laboratory or building, or it can be spread out over a wide area.

 

TESTS