变异系数

Potassium, natrium determines it is good that use ion chooses electrode indirect method it is better also with indirect method to determine at calcium of direct way;, it is next occasionally phosphor of; of law of azotic arsenic Ⅲ determines use phosphor molybdic acid is ultraviolet law outcome is better it is better with result of law of personal candy kinase that; blood sugar determines; urea determines use Niao enzymatic ultraviolet anhydride of better; flesh uses rate law result enzymatic law outcome is better; albumin determines, it is vanadium acid next alkalescent phosphoric acid of oxidation law; is enzymatic determine outcome of fluid of use AMP amortize is better; amylase determines law of thing of enzymatic standard background and iodic colorimetric law coefficient of variation all bigger, former a bit small, latter of percent of pass is tallish, each lab can try to choose according to his condition.

结论钾、钠测定使用离子选择电极间接法好于直接法；钙测定用间接法也较好，其次是偶氮砷Ⅲ法；磷测定使用磷钼酸紫外法结果较好；血糖测定用己糖激酶法结果较好；尿素测定用脲酶紫外速率法结果较好；肌酐用酶法结果较好；白蛋白测定用溴甲酚绿法较好；胆红素测定用酶法结果好，其次是钒酸氧化法；碱性磷酸酶测定使用AMP缓冲液结果较好；淀粉酶测定酶法底物法和碘比色法变异系数均较大，前者稍小，合格率后者稍高，各实验室可根据自己的条件加以选用。

Result］ The study showed that the content difference of the heavy metals in soils from Blumea balsamifera planting base in Guizhou Province was more large, and the variance coefficient ranged from 13.70% to 65.79%. Results of synthetical pollution index and nemerow pollution index showed that the soils were not polluted.

结果］ 贵州省艾纳香种植基地土壤重金属含量水平差异较大，变异系数为13.70%～65.79%，均达国家土壤环境质量标准；综合污染指数与尼梅罗综合指数结果表明，调查区域内土壤未被污染。

Ple2trait BLUP ,and economic weight of BF was set as 215 times of that of ADG.

变慢，第五世代累积选择反应的变异系数下降。

According to the analysis of the main nutrition contents in 70 Cucurbita moschata,the average coefficient of variation was 31.70%.

通过对70份中国南瓜种质材料的主要营养品质的分析得出，各品质性状在不同材料之间表现出了不同程度的多样性，平均变异系数为31.70％。

The WBChE and EChE are correlated with the severity of AOPP,and can be used as a clinical indicator The variation coefficient of PChE is big,and can not reflect the severity and clinical changes of AOPP.

全血、红细胞ChE变化与AOPP临床中毒程度及其病情变化呈正相关，可作为临床观察有效指标。血浆ChE变异系数大，不能准确反映AOPP临床中毒程度及其病情变化。

Transplant-enrichment degree is reflected by interbedded variabl coefficient of base content in soils profile.

以土壤剖面中盐基含量的的层间变异系数反映其迁移聚积程度。

And the scientific research showed that they are medicable to insomnia, anxiety and other diseases that found in modern people. 4 The regression models of biomass were used to calculate the total cumulative biomass. Average biomass of six samples was 62.88 t·hm-2 after cutting 3 years, which was higher than that of tropical secondary forests with 5 years succession. It can be concluded that traditional fuel woods had played an important role in conservation of tropical forest in the area. Caloric values were not different in major fuel species (Coefficient of variation was only 1.1%). The similar result was found in stems of C. siamea after growing different years. The main reason of C. siamea cultivation was that it had the character of hardwood, easy collecting, little ash, and so on.

铁刀木的各个部位都作药用，资源量大的树叶和心材使用最多，并且现有的研究成果表明它们具有多种活性成分，针对现代人常患的失眠、焦虑等疾病具有较好疗效。4）通过收获法拟合的生物量回归模型对推测西双版纳地区铁刀木林薪柴蓄积量有较高的参考价值，砍伐3年后的六个样方中铁刀木的平均生物量为62.878 t.hm-2，高于5年林龄的热带次生林（16.35t·hm-2），对西双版纳热带雨林的保护有着重要意义。5）几个村寨最主要的薪材树种热值研究结果变异系数仅为1.1％，各薪材树种之间热值相差不大，铁刀木被选择为传统薪炭林更多是因为材质坚硬、收获运输方便、燃烧完全等特点。

First, this paper gives an introduction of some methods of unequal probability sampling, their estimators and variance estimators, including sampling with pps with replacement, methods of sampling without replacement suggested by Brewer, Durbin, Sampford , Des Raj , Murthy , Rao-Hartley-Cochran. Then, at the basis of Rao and Bayless's study , we consider that population can be splited two random subpopulations, which are respectively drawn from different infinite super-populations, and compare the stabilities of estimators of the methods that given above.

本文首先从理论上介绍了若干种不等概率抽样方法，它们的估计量、估计量的方差及其估计，其中包括有放回PPZ及PPS抽样，不放回不等概率抽样中的Brewer、Durbin、Sampford、Des Raj，Murthy、Rao-Hartley-Cochran等人的方法；其次，在Rao和Bayless两人就样本单元数n=2的情形对上述抽样方法进行比较的基础上，将总体随机地分成两个子总体，视每个子总体取自不同的线性超总体，在文中，我们利用计算机实现随机分组，并通过画图比较各方法估计量的稳定性，结果表明，对变异系数C.V。

First, this paper gives an introduction of some methods of unequal probability sampling, their estimators and variance estimators, including sampling with pps with replacement, methods of sampling without replacement suggested by Brewer, Durbin, Sampford , Des Raj , Murthy , Rao-Hartley-Cochran.Then, at the basis of Rao and Baylesss study , we consider that population can be splited two random subpopulations, which are respectively drawn from different infinite super-populations, and compare the stabilities of estimators of the methods that given above.

本文首先从理论上介绍了若干种不等概率抽样方法，它们的估计量、估计量的方差及其估计，其中包括有放回PPZ及PPS抽样，不放回不等概率抽样中的Brewer、Durbin、Sampford、Des Raj，Murthy、Rao-Hartley-Cochran等人的方法；其次，在Rao和Bayless两人就样本单元数n=2的情形对上述抽样方法进行比较的基础上，将总体随机地分成两个子总体，视每个子总体取自不同的线性超总体，在文中，我们利用计算机实现随机分组，并通过画图比较各方法估计量的稳定性，结果表明，对变异系数C.V。

Results showed that urokinase at 20U/ml was the optimal concentration used. Fibrinolysis kinetics and plasma plasminogen concentration of 27 normal persons and 27 patients with acute myeloblastic leukemia were detected, a significant difference was observed between the two groups. Repetition test showed that the coefficience of variation was 5.24±1.51%. This method could also be used to detect the concentration of plasma fibrinogen.

结果 初步建立了正常人纤溶动力学分析参数，确定了20U/ml尿激酶为最适试验浓度，检测22例正常人，27例急性髓细胞白血病患者纤溶动力学及纤溶酶原含量，显示患病组较正常组差异有显著意义(P.05， P.01)，重复性试验显示该方法的变异系数为(5.42±1.51)%，并可同步测定血浆纤维蛋白原浓度。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。