SU407322A1 - DEVICE FOR DETERMINATION OF DISPERSION - Google Patents

Description

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The invention relates to the field of specialized computing devices and to be used in devices and devices for statistical processing of information.

Devices are known that contain an average counter with a counter-divider, a dispersion counter with a counter-divider counter, a sample counter, a controlled reversible counter with a quad at the output.

However, such devices calculate the variance with inaccurate accuracy in a number of cases.

The proposed device is characterized in that it comprises a second quadrant associated with the output of the sample counter, through which the first counter-divider is connected to the second counter-divider. This link allows the correction of the calculated value of the dispersion EI with the fractional part of the arithmetic mean.

The block diagram of the device shown in the drawing.

Input 1 is connected through the input information processing unit 2 with the first counter delnator 3 and the controlled reversing counter 4. The second output of the input information processing unit is connected to the second input of the counter 4, to the sample counter 5 and the first quadrant 6. One output of the first counter is The delntel 3 is connected to the input of the average counter 7, the outputs of which are connected to the inputs of the reversible counter 4. The other output of the counter delmtel 3 is connected through the second quad 8 to the second counter by means of a divider 9. The output of the controlled reversible counter Model 4 is connected through the first quad 5 to the second counter-divider 9. The output of the sample counter 5 is connected to the control input

the first counter-divider 3 and the reversible counter 4, as well as the input of the second quadrant 8. The output of the second counter-divider 5 is connected to the dispersion counter W. Discharger counter 9 and discharge the dispersion counter W

connected to indicator 11.

The device works in the following way. In the initial position, the signal from sample counter 5 holds the counter input open} and divider 3 and closes the reversing counter 4 input. The operation of the device is divided into two stages. At the first stage, the arithmetic average of X is calculated from an auxiliary sample of volume .Vi, and at the second stage, the dispersion D is calculated from a sample of volume M. Calculation

produced by the formula:

 (Xx,}

Nz

where Xi is the current value of the random variable X. On the first reference of the number L, stop through block 2, which transforms and normalizes the input signals, to the nerve counter-divider 3, which accumulates the sum of 2A (and dividing the result by the sample size The overflow pulses of the divisor counter 3 are counted by the average counter 7. The number of incoming numbers X; count by sampling counter 5. When the sample reaches the set volume, the signal from the output of the sampling counter closes the input to the divider counter 3 and opens The input to the controlled reversible counter 4. At this point, the average 7 in the counter will be number X, and in the counter-divider 3 is the remainder D. The binary code of the number AX is converted by the quad 8 to the binary additional code of the number (& X), which, with a signal from sample counter 5, is rewritten to counter divider 9. Depending on the required accuracy of calculation, quad 8 is connected to two or four senior bits of separator counter 5. At the second stage of operation, when each Xi number arrives, unit 2 issues a number recording signal X to reversible counter 4. Then on the counter 4 enters the number Xi. In counter 4, the difference X-Xi is determined, the binary code of which is transformed by quadrant 6 into a real number code (X-Xi). This code is rewritten into counter-divider 9 by a signal from input processing unit 2 2. In counter-divider 9, the accumulation of the sum I :() 2 takes place and the result is divided by the sample size La. The overflow pulses of the splitter counter 9 are counted by the dispersion counter 10. When the sample reaches the volume, NZ in the dispersion counter 10 and the splitter counter 9 will have the following output: (Xi - j) 2S (X, - - Ho) N, where Ao and DO are true values arithmetic mean and variance. The calculated dispersion value is displayed on the indicator 11, while the contents of the counter divider 9 can also be displayed on the indicator. Upon completion of the sampling -V2 from the sample counter 5, blocking signal of block 2 can be heard (indicated by a dotted line in the drawing). The subject matter was invented and a device for determining dispersion, containing an input information processing unit, the first output of which is directly connected to the first input of the first quadrant and to the first input of the reversible counter l via a sample counter - to the first input of the first counter {a-divider and to the second input of the reversible counter , the second output of the input processing unit is connected to the third input of the reversible counter Ie Midsummer, and through the first counter-divider and the average counter to the fourth input of the reversing counter, the output of which is connected through the first quad to the first input of the second divider counter, the first output of which is connected to the dispersion counter, the second output of the second divider counter and the output of the disiersion counter are connected to an indicator, characterized in that, to improve the accuracy of the device, it contains the second quadrant, the output of which is connected to the second input of the second divider counter, the first input is connected to the output of the first separator counter, and the second input is connected to the sample count input.

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