actual mean
2.The results showed:when the θ angle increased,the uncorrected veloci-ty on Doppler flow spectrum(VD)decreased,but not accorded to cosθ law,so there were great differences between he actual mean flow velocity and the corrected velocity on Doppler flow spectrum(VDc)measured on dif-ferent angles; both the VD and the VDc were much higher than VR.
5.Provide automatic test function of fiber diameter, directly observe fiber configuration on screen,and display the actual diameter of all fiber on-time. fast test speed, simple operation, and reduced personal error.Automatically compute mean diameter, coefficient of variation and standard deviation of the tested fiber, the tested date can be printed out by EXCEL.
8.It is expected to obtain the minimal value of mean-square error between the actual output and the expected output of the network by means of the model. It is proved by simulation calculation that this mathematical model has the better precision.
9.Actual investigation on fixed regions for closing hillsides to facilitate affor-estation in 15 counties and mesutement of 349 sampling wood increment showed that the ave-rage growth percent compared with normal forests of 1984 was 0.64% higher in pine, 1.93%in Chinese fir, 0. 74% in broadlef tree, mean number of tree per mu increased into 23.2 from16.
10.and the integrated forecast model is suggested. Six meteorological factors, such as wind velocity, wind direction, relative humidity, cloud, average temperature, highest temperature, are selected as input variants. After two months forecast test, the results show mean relative error of O3 concentration between forecast value and actual value is 21.49%, correlate coefficient is 0.837. Artificial neural network is a effective method to forecast the O3 concentration.
