:1971 The First American Computer Association (ACM) Grace Murray Hopper AwardAcademician of the American Academy of Science and Arts, 19731974 Turing Award from the American Computer Association1975 member of the National Academy of Sciences, Ford Award (Lester R. Ford Award), American Mathematical Association (MAA)1979 American Science Award by President Carter1981 elected as academician of the American Ac
of recursion is more, the cost is quite considerable, so if the program can be more easily changed to another way, you should consider other ways.In addition, the stack of space is not infinite, generally normal call is no problem, but like the example described in the previous section, the stack space is too deep, the system will throw an error, java.lang.StackOverflowError, that is, stack overflow.SummaryThis section describes the basic principle o
card memory it is to communicate with the CPU bridge. All programs in your computer run in memory, so the performance of the memory affects the computer very much.
5, hard disk is one of the main storage media, consisting of one or more aluminum or glass-made discs. Now solid-state drives are replacing ordinary hard drives.
6, sound card is also called audio c
Basic configuration and tuning policies for high-availability and high-performance computer systemsQingdao railway station Computing Center Yu Dong Liu Mei
Computer users need such a computing environment: ReliabilityThe performance must be sufficient to handle various loads in complex environments. Users place various applications in
This is my recent "Computer graphics" course practical programming class introduction of the relevant knowledge, mainly want to use MFC C + + drawing, let students realize the graphics related to the programming and simple graphic drawing, at the same time very admire the students imagination, they do really good. I hope this basic article will be of some help to you. In particular, students with this cours
Basic components of a computer
One motherboard:The main board is a platform for various components in the computer to work. It closely connects all components of the computer and transmits data through the main board.
Ii. central processor (cpu)Cpu is the computing core and control center of a
1. node.
It refers to a computer or computer network device, that is, the basic unit of the entire computer network.
2. Computer Network
General Definition: a collection of computers that use certain communication protocols to communicate with each other through transmi
In the second half of the semester, I started to teach my freshman basic courses on computer culture. I always wanted to do something for my students. For students in Hebei province who want to take the computer Level Examination in Hebei province, they plan to prepare a computer-based examination and practice system f
The first chapter--Overview
Computer network Performance Index
1. Rate, transmission data rate, also known as data rate, bit rate, units are: b/S, kb/s, MB/s, tb/s
2. Bandwidth, the highest transfer rate, which is the highest rate, with the same unit rate
3. ThroughputThe amount of data per unit of time through a network channel or interface, in units B, KB, Mb, Gb, Tb
4. Delay, transmission delay (time required for the host or router to send data),
new technologies are constantly emerging. These capabilities did not appear out of thin air, but were learned purposefully and targeted based on the accumulation of basic knowledge.
Chapter 1 Basic knowledge of computer circuits
(1) Summary
1. Basic Physical Quantity of the circuit: ① current ② voltage ③ powe
source code and the library, and the source code can be compiled in any system that supports this APIPOSIX:API Standard, POSIX-compatible programs can be compiled in other POSIX systems to executeDynamic Library: DLL so independent, put on the operation aboveStatic Library: Lib a library and software put together, directly run canOther:Go to IOE:IBM minicomputer (PC server) orcal (MySQL) EMC's back-end storageDomain Name application: net.cnSecond, Li
WEEK 1
I. In terms of knowledge, it is to learn basic computer knowledge.
1. Understand the development, application, composition, and network of computers;
2. Learning about computer operating systems: common operating systems, operating system functions and classifications;
3. Learning office software: Word \ Excel \ PPT, such as the numbering format in word, a
The motherboard is a platform, the CPU, memory, graphics, hard disk, optical drive through the data cable or directly installed to form a working whole. CPU equivalent to the human brain, issued a variety of instructions to coordinate the work of various parts, memory is a transit warehouse, the transfer of various instructions, data and so on. After shutdown data is not retained, the hard drive is the final carrier, all data, programs, songs, movies
Network:A computer network consists of a group of machines that are interconnected by communication channels. We refer to these machines as hosts (hosts) and routers (routers). Routing:The purpose of the router is to transmit or forward information from one communication channel (forward) to another communication channel. Channel:Communication channel (CommunicationChannel) for interpretation: it is a means of transmitting a sequence of bytes from one
functions of the underlying hardware, output to each application, and resource allocation, resource cutting and redistribution. Therefore, the monitoring program can be regarded as a virtual computer, which is commonly referred to as the operating system.
Spatio-Temporal partitioning: The CPU divides time to provide productivity, and memory divides space to provide productivity.
Ring: Four loops of the comput
and modification. Each layer of service is implemented through the services provided at lower levels and the functionality of this layer.Internet Architecture:Application Layer Application: Provides support file Services (FTP) for some specialized applications, mail (SMTP), Web pages (HTTP)Transport Layer Transport: data transfer between processes (end-to-end) TCP, UDPNetwork layer networks: Routing datagrams from the source host to the destination host (host to host) IP, routing protocolsData
This warehouse is mainly used to summarize the basic theoretical knowledge of computer science and the relevant content of mainstream programming language, each of which corresponds to a large direction.Main contentThe main computer base has the following major directions:
DataBase
Datastructure
Linux_os
Network
Algorithm
Math
The programmi
, and step () points to the code in this class.This table is generated when the class is loaded, and when the method is dynamically bound through the object, it is only necessary to find the table, instead of looking for each parent class.Next, we look at the access to the variable.Variable AccessAccess to a variable is statically bound , whether it is a class variable or an instance variable. The code demonstrates class variables: B.S and C.S, which access class variables through objects, and
One. Basic data type Knowledge points
The basic data type in 1.c/c++ is.
: integral type, floating point type, character type, no value type
2. How the basic data types are subdivided.
: Integral type includes: Signed Long Integer (signed long int), unsigned long integer (unsigned long int), signed short integer, unsigned short integer type.
3. Type modifier S
First, make maintenance judgments from the simplest things to do simple things, on the one hand refers to observation, on the other hand refers to the simple environment. The simple thing about is observation, which includes: 1, the environment around the computer-location, power, connectivity, other equipment, temperature and humidity, and so on; 2, what the computer shows, what it displays, and ho
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