direct estimate
1.Firstly, the experimental phase current and inputpower data obtained from load test are employed to estimate the parameters inrated condition. Then, the phase current and input power data in locked rotor condition are used to track the variation of the parameters of the secondary coil with slip frequency. The classical method and the direct modification method are also used to estimate the parameters of the induction machine in comparison with this technique.
6.The three objects are as follows: (1) with the first object of gaining maximum direct economic benefit, founded on six small commodity production bases and constructing an economic system that gives consideration to the benefits in short & mid dle & long terms; (2) with the second object of gaining the best ecological benefit and concentrated on forest-grass plantation, constructing a benign eco-system using relative value to estimate the ecological benefit;
7.By using Separate Source Method and Mine Statistic Method, the paper makes a comprehensive estimate about the gas emission, when light support top-coal caving technology is adopted in mining face during the initial phase in the third mining level, which is useful to direct the gas control and the safe production in the future.
8.This study was conducted to examine the interrelationship of 10 seed vigor traits in 12 wheat genotypes through variance,co-variance and path coefficient analysis,to determine broad-sense heritability,and to estimate genetic advance under selection.The genotypes showed significant difference for all traits,except for percentage of normal seedling.Genetic correlation between conversion efficiency of seed reserve,electrical conductivity with other traits were not significant,showed that selection for any of them might be possible without hampering any other traits.However path coefficient analysis indicated that conversion efficiency of seed reserve,seed reserve utilization ratio have strong direct effect in affecting seedling weight,and that mean germination time has significantly negatively correlated in affecting GI.Moderate to high estimates of broad-sense heritability,genetic coefficient of variation and expected genetic advance were obtained for electrical conductivity,germination index,mean germination time,seed dry weigh,seedling dry weigh,seed reserve depletion ratio indicating the possibility for improving these traits.
