Number of production and development!! Urgent! Find the origin and development of the average! Urgen

As early as 3,000 years ago, China's "Zhou Yi" had produced the idea of averages. "Zhou Yi" "Qian" hexagram says: "Humility, a gentleman is more than he can, and he is called a flat giving."

Wang Bi's note says: "Those who are more humble are better, and those who are less are humble for their benefit; With the object, Shi does not lose peace. Kong Yingda's righteousness said:

Weigh the amount of this thing, and apply it equally. He who has more things before him gets what he gives; The first of the things is the widow, and they also get their giving. Zhu Xi's note in the Song Dynasty said:

The more the better, so the right thing is said to be even, the loss is high and the humble, to be interesting in the flat, but also humble meaning. ”

The average is the sum of all the data in a set of data, divided by the number of data. An average is the amount that represents the trend in a set of datasets, and it is a metric that reflects the trend in a set of datasets. The key to solving the average problem is to determine the "total quantity" and the total number of copies corresponding to the total quantity.

In statistical work, the mean (mean) and standard deviation are the two most important measures to describe the tendency and dispersion of a data set.

When it comes to mathematics and life, you may wonder if mathematics has nothing to do with life. In fact, mathematics is closely related to our lives, as long as you have a pair of eyes that are good at discovering, you will find that mathematics flashes everywhere in life, and we are inseparable from mathematics. Let's take a look at a few examples that are not difficult for us to find.

When we eat with a bowl in our hands every day, do we think about why the toys we use are like this? In fact, the bowl used for eating has gone through a long period of development before it has become what it is now, the round outline, can win more things, the center is symmetrical, both beautiful and easy to use, oh math is around me.

Our beautiful capital Beijing, the Forbidden City complex, the architectural style is the use of mathematics, axial symmetry, foreign tourists, the Forbidden City is huge, neat and surprised, in fact, this is the charm of mathematics, this is the figure of mathematics because of mathematics, our scientists, only to calculate, the orbit of the satellite in the universe, the satellite we can launch the satellite, there is a satellite we can, play **, watch the weather forecast, can watch TV, so our life is inseparable from mathematics.

The beautiful metropolis is full of high-rise buildings, the house we live in, the corners of the walls are hidden in straight lines, the walls are hermit planes, the stairs contain cuboids, the edge of the garden has a circle, the TV screen we watch is made into a rectangle, the stable small table in my house hides the triangular bracket, the water pipe I teach is made into a circle, and when you turn on the faucet, it can be rattled and flow out quickly, and the bus we make has a round wheel, which is so stable.

Take a closer look and we'll find out. Our lives are full of mathematics, and without mathematics, our lives would be so bad, and I have to learn mathematics well.

Data processing. data processing

Acquisition, storage, retrieval, processing, transformation and transmission of data. Data is a form of expression of facts, concepts, or instructions that can be processed by humans or automated devices. Data can be in the form of numbers, words, graphics, or sounds, among others.

Once the data has been interpreted and given a certain meaning, it becomes information. The basic purpose of data processing is to extract and derive data that is valuable and meaningful to some specific people from large amounts of data that may be disorganized and difficult to understand. Data processing is a fundamental part of system engineering and automatic control.

Data processing runs through all fields of social production and social life. The development of data processing technology and the breadth and depth of its application have greatly affected the development process of human society. Data processing is inseparable from the support of software, data processing software includes:

Various programming languages and compilers for writing processing programs, file systems and database systems for managing data, and application packages for various data processing methods. In order to ensure the safety and reliability of data, there is also a set of data security and confidentiality technology.

There are different ways of data processing, depending on the structure and working mode of the data processing equipment, as well as the time and space distribution of data. Different processing methods require different hardware and software support. Each type of treatment of missing land limb has its own characteristics, and the appropriate treatment method should be selected according to the actual environment of the application problem.

There are four main classification methods of data processing According to the structure of the processing equipment, there are online processing methods and offline processing methods. According to the allocation method of data processing time, there are batch processing methods, time-sharing processing methods, and real-time processing methods. According to the distribution mode of data processing space, there are centralized processing methods and distributed processing methods.

According to the working mode of the computer processor, there are single-channel job processing mode, multi-channel job processing mode and interactive processing mode.

In the past 15 years, the total number of stadiums in China has grown from more than 610,000 in 1995 to more than 1 million in 2009.

From 1996 to 2009, more than 150,000 national fitness paths were built in urban and rural areas across the country, benefiting the majority of urban and rural residents and becoming a sports and fitness landscape with Chinese characteristics.

In 2006, the Ministry of Education and the General Administration of Sport of the People's Republic of China jointly launched a pilot project to open campus sports venues to the public, and more than 20,000 schools have been opened to the public so far. As of 2009, youth school football activities have been held in more than 2,000 schools in 44 cities across the country, and football is loved by more and more children.

By the beginning of 2010, more than 5 billion yuan had been invested in the construction of more than 200,000 sports facilities in rural areas.

The state's "Charcoal in the Snow" project has helped build public sports facilities in the "old, young, marginal and poor" areas, benefiting 406 counties (districts) in 28 provinces (autonomous regions and municipalities) across the country, bringing warmth and health to the people in the poorer areas.

Over the past 15 years, sports social organizations at all levels have basically covered the vast areas of urban and rural areas across the country, and there are 210,000 sports guidance stations and activity sites in urban and rural communities.

In the 16 years since the implementation of the "Technical Grading System for Social Sports Instructors" in 1994, China has trained 400,000 social sports instructors. Social sports instructors are active in the front line of national fitness, and play the role of "leading eagles" in the process of promoting the development of national fitness.

According to survey data released by the General Administration of Sport of China, in 2007 there were 3.4 billion urban and rural residents in the country who "regularly participated in physical exercise", accounting for 28.2 percent of the total population. Sheng Zhiguo, director of the Mass Department of the General Administration of Sports of China, said that although the population proportion of 28 2 is not high compared with developed countries, for China, a developing country with a population of 1.3 billion, it is enough to show the extent of China's current participation in national fitness.

Enterprise scale, operation mode, execution.