To improve the computational performance of the FCM algorithm used in the dataset clustering with large numbers,the concepts of the equivalent samples and the weighting samples based on the samples' eigenvalue distribution in the feature space were introduced and a novel fast cluster algorithm named WFCM(weighted fuzzy C-means) algorithm was put forward,which was inherited from the traditional FCM algorithm.

This method uses the center of gravity method to obtain the clustering centers of load classifications and their equivalent samples, and by identifying each clustering center equivalent sample, the synthetic load model of each classification is gained.

The preliminary results of imaging of biological equivalent samples, such as large volume solution phantoms, suggested that the present ESRI system was capable of imaging biological samples in combination with spin labeling techniques.

Based on the hypothesis of Bernoulli model and concept of equivalent samples,the prior information of accident rate may regarded as the sample information obtained from engineering practice. Its distribution is accord with that of Beta conjugate function. By this method the computation of the posterior distribution of accident rate can be simplified.

Concern was expressed that randomization fails to produce equivalent samples, without apparent appreciation this is inevitable when variables are distributed by chance; lack of equivalence is controlled by use of tests of significance.

To reevaluate these assertions which had been generally accepted without independent evaluations, the transcripts of Brown were reanalyzed employing equivalent samples of the interactions of Adam and Eve with their mothers.

This was corroborated by a paired t-test analysis, which supported the hypothesis that the S/C biopsies measured equivalent samples.

When the remaining undried, unhusked samples arrived in Peoria, they were husked and randomly separated into 5 equivalent samples.

In the crop year 1979, freshly harvested dent corn was coUected at maturity in 57 sets of 2 equivalent samples/set.

The variance formula of the sample mean of the stratified sampling has been derived from some common hypotheses and by putting forward a new concept, i.e.the equivalent sample size, the stratified sampling has been introduced into the system of the theory of grading based on the random sampling. Moreover, taking the cost of inspection as the objective function, the optimal method for fixing the sample size in the stratified sampling has been obtained and the index for appraising the sampling...

The variance formula of the sample mean of the stratified sampling has been derived from some common hypotheses and by putting forward a new concept, i.e.the equivalent sample size, the stratified sampling has been introduced into the system of the theory of grading based on the random sampling. Moreover, taking the cost of inspection as the objective function, the optimal method for fixing the sample size in the stratified sampling has been obtained and the index for appraising the sampling method on the basis of the mathematical statistics has been proposed. Those theoretical results have been tested and verified through computer simulation.

In this paper, the variance of the stratified sample variance and the standard deviation have been derived from the hypotheses that the size mean of a skein and the interskein size are random variables of a normal distribution, and the equivalent sample size has been given, thus solving the problem of grading in the stratified sampling inspection of the variance based on the theory of grading through random sampling, such basic problems as the impact of interskein variance on the inspection results...

In this paper, the variance of the stratified sample variance and the standard deviation have been derived from the hypotheses that the size mean of a skein and the interskein size are random variables of a normal distribution, and the equivalent sample size has been given, thus solving the problem of grading in the stratified sampling inspection of the variance based on the theory of grading through random sampling, such basic problems as the impact of interskein variance on the inspection results and the appraisal of the sampling inspection method are also elucidated. The theoretical results have been tested and verified through computer simulation.

A new method of realizing sampled A/D transformation by phase-locked loop was presented. Applying pll frequency transformation to,the input signals, an equivalent sample delayed signal hi was obtained.According to the input signal frequecy property, the equivalent sampling numbers and actual sampling interval of the input signals were controlled by a microcomputer program. Based on this principle, a data sampling system of high frequency and periodic signals was designed.