Then , from the expressions of structural random response of the frequency domain , the computational expressions of the mean value , variance and variation coefficient of the mean square value of the structural displacement and stress response under the stationary random excitation or non - stationary random excitation are developed by means of the random variable �� s
12.
By way of builds the horizontal data models of development of secondary industry and tertiary industry and adopts variation coefficient and side are wrongs and complete in the coefficient , and analyses the industrial structure change standard , and reach : the industrial structure of our country every province and city area is changed the standard and is all had the raise of different level 22 certain periods at reform and open , and three horizontal district gaps of industrial structure change in our country were consta
13.
Using the regional trial data of guangdong hybrid rice in 1994 and 1995 , and regional trial data of national late hybrid indica rice in 1995 and 1996 , by t test , variation coefficient and regress coefficient , analysis and compare with the fertility character , steady character and adaptive character of teyou 524 and ck ( shanyou 63 , shanyougui 33 ) , the result showed : it was obviously that the fertility character and adaptive character of teyou 524 was better than ck , but steady character was between shanyou 63 and shanyougui 33 , it was a quite good lat - mature and high - yield new hybrid rice combination
14.
In views of hebei province ' s existing situation of rural economy , and with reference to the civil and abroad achievements in scientific research on the field , this thesis choose two sample groups - 11 cities and 138 counties of hebei province in light of division into districts and analyses the rural economy difference of hebei by using total and mean index , the social product gross of rural , rural labor productivity , the mean net income of rural , and methods of variation coefficient , comprehensive index and so on .
15.
In the paper , the main results are brought forth in five aspects as follows : ( 1 ) . the analysis of statistics the characteristic indicated that the variation coefficient of the soil nitrogen density of 0 ~ 30cm depth is lower , the variation coefficient is only 3 . 6 % , the variation coefficient of the nitrogen density of 0 ~ 100cm depth is much bigger than that the 0 ~ 30cm depth , it is 100 % . based on the second national soil general survey material , the average soil profile depth is 101cm , this is in corresponding with skew normal distribution , its standard deviation is 0 . 0192
16.
The linear relation assumes between the mean characteristic parameter , sorting coefficient , variation coefficient of pore structure by rectangular method and the fractal dimension by integrated linear regression , indicating that the fractal dimensions can be used to quantitatively describe the heterogeneity of reservoirs
17.
3 ) the sandbody distribution , physical properties , pore structure and heterogeneities are affected by the microfacies . at the center part of underwater distributive river course , the petrophysics and physical properties are both better than that at the edge of the microface . 4 ) the chang 61 2 - 3 substrata and the substrata of chang 62 " member which show the better porosity , permeability , and better pore structure ; display lower permeability variation coefficient , dart - coefficient and contrast - coefficient and good connecting sandbody so the horizontal heterogeneities is weaker ; whereas manifest stronger inner - heterogeneities due to the numerous intermediates ; present stronger inter - heterogeneities caused by the greater frequency of sandbody
18.
Using the concept of heredity knowledge and its heredity coefficient of s - rough sets , it gives the concept of variation coefficient of knowledge , presents the theorem of attribute dependence of variation coefficient and the relation theorem of heredity - variation , and puts forward the heredity mining of knowledge and its algorithm in conclusion
19.
About the confirmation of the position evaluation factors scale , the thesis has put forward using the fuzzy analytic hierarchy process ( fahp ) to evade subjective factor influence and make the position evaluation system more scientific . the thesis makes use of mathematics tools , such as the standard deviation of the sample , variation coefficient , etc . to analyze the deviation that the judge panel give a mark , and carry on effective correct ing
