无偏试验

Because of this, regular Least-square analysis method can not be used in this type of test.

本文根据客观特点，依据新的模型和最优线性无偏估计原理，对于这种试验提出了一种新的分析方法——一般最小二乘分析。

The results from an example showed that the unbiased estimate of error variance could be obtained so that polygenic variance and polygenic heritability could not be underestimated. Moreover, the AIC values by using the average of two replications were less than that by using the observations of a replication.

在试验设计为重复内分组随机区组设计时，通过甘蓝型油菜初花期的遗传分析表明：这种方案的试验误差方差估计值无偏性好，可避免多基因方差和多基因遗传率被低估；重复观测值平均数的分离分析的AIC值低于利用单一重复资料的AIC值。

Results indicate that in general the MDWF is comparable to L-M in both unbiasedness and efficiency for the studied cases.

统计试验结果表明，两种方法的无偏性、有效性均相当。

A comparison of the present method with the Probability Weighted Moments indicates that the two methods are comparable to each other both in unbiasedness and in efficiency for the studied cases.

统计试验结果表明，修改后的双权函数法无偏性方面优于矩法，有效性与矩法相当；与PWM法的部分结果对比表明，两者统计性能接近。

Through the statistically comparative analysis of these methods,it comes to a conclusion that the unbias and robustness of liner moments are better than the others .

通过对各种方法的统计试验的比较分析，得出线性矩法的无偏性和稳健性较其他方法为优。

Results After six passages in BHK-21 cells, cytopathic effect was observed by microscopy. The rescued virus was rejuvenated once in unweaned mice, and then came back to cell passage. We found that the poly tract of rescued virus was shortened when the virus was passaged twice in BHK-21 cells. Although the data of LD50 in mice and TCID50 in BHK-21 cells showed that the virulence and infectivity of genetic engineering viruses were lower than its parental virus, no significant difference was observed between the genetic engineering viruses with the different length poly tract.

我们发现，基因工程毒在BHK-21上连续传代至第6代时，可见明显的致细胞病变效应(cytopathic effect，CPE)；在经过一代乳鼠接种之后再重新适应到BHK-21细胞的过程中，poly区段出现了缩短现象；乳鼠致病性试验和BHK-21细胞TCID50测定结果表明，尽管基因工程毒与母本毒相比毒力偏低，但含有不同长度poly的基因工程毒之间并无显著差异。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。