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Random Number Generation

Random numbers are used in many places. The appearance of the sounds of nature, the bus run time from the same stops, travel time between home and the office every day, the variable load of each month, predicting the flip of a coin when he threw up, predict the sum of two sides of a given when lifting. All these phenomena have a certain degree of randomness.
The random numbers are generated in the sequence numbers that can not be predicted. For example, if the equation of a variable Y = X + 5 * 4 X can be completely predicted from random numbers Y. occur between 0 and 1 and are perfectly normal distribution.


For example, when produced in a large number of random numbers occur equally between 0 and 1 on the Gaussian curve. That is to say between 0 and 0.1 would have the same amount of numbers between 0.8 and 0.9. Random numbers are required in the simulation studies such as the simulation of driving time between two locations, simulating a pair of dice, simulating. There are many different types of random number generators the most important is the linear congruence generator.
These numbers are generated when they have to respond to numerous tests defined for the frequency statistics, etc. normally, but the numbers generated by many generators are pseudo-random. It is very important to use random numbers perfect to analyze systems using discrete event simulation models so we can get replicas of the simulation models are statistically independent. These are also generated using the sounds of nature and other natural phenomena.
random random variables can also be generated using these numbers. These random value may be uniform, Fish, etc. normal, in this case, would be required to generate the distribution function, for example, a number such as "time to wake up in the morning" may vary from 5:30 to 9: am 12. In the case where there is a likelihood equal to wake up at any time 05: 30-09h00, then wake up time can be given that the wake-up time 5:30 = 210 + r * r is a number between 0 and 1.
Now if you realize in the above equation if r is generated uniformly between 0 and 1, the time of awakening vary uniformly 5: 30-9 and thirties. But the r distribution is not normal, then you might find several r values ​​generated between 0.4 and 0.5, for example, 0.9 to 1. Thus, when the act of awakening is a simulation find several data values ​​between 6:54 ET 7:15 produce a false inference or false conclusion that the simulation model. It is therefore very important to use a generator that produces normally distributed data.
The author is a master double scientific research in the ISE and IT. He worked for many years in leading companies of IT services.


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