查询词典 experimental design

Six-factor and three-level orthogonal experimental design was used to optimize the SFE co nditions as guided by the content of total coumarins in the extract. Constituent s of the coumarins were analyzed by GC-MS, and their relative contents were det ermined by normalization method of areas.

采用正交试验设计方法，以提取液中总香豆素含量为考察指标，对总香豆素提取条件进行优化，并用气相色谱质谱联用技术对超临界样品进行分析鉴定，利用面积归一法测定其相对含量。

Methods:Using the orthogonal experimental design,the optimal process of microwave assisted extraction for Erysimum cheiranthoides L.

方法通过正交设计的方法，采用连续微波辐射方法进行微波萃取工艺的优化。

objective:to study the microwave assisted extraction process for active ingredients in erysimum cheiranthoides l..methods:using the orthogonal experimental design,the optimal process of microwave assisted extraction for erysimum cheiranthoides l.

目的研究微波辅助萃取桂竹糖芥的提取工艺。方法通过正交设计的方法，采用连续微波辐射方法进行微波萃取工艺的优化。

Three rumen fistulated Holstein cows were used in a 3×3 Latin square experimental design to determine the rumen degradabihty of NDF and ADF of corn silage at premilk stage, milk stage and dough stage and the effect of diets on rumen environment of cows.

用3头装有永久性瘘管的中国荷斯坦牛，采用3×3拉丁方设计对蜡熟期、乳熟期和乳熟前期的玉米青贮的NDF和ADF进行了瘤胃降解率及其日粮对瘤胃发酵内环境的影响进行了研究。

Chitosan alginate loaden enzyme have prominent effect for activity of immobilized enzyme by orthogonal experimental design, and getting optimum condition .

经正交实验L_8(2~7)，壳聚糖、海藻酸钠、载酶量对固定化酶活力影响比较显著，确定最佳固定化酶条件。

Second, to conduct a quasi-experimental design using nonequivalent groups to study the effects of adaptive pointer during math-learning.

第二，我们实作了一个不等组前后测的准实验设计来研究适性指标在数学学习的效果。

The samples gathered in this study were 4th-grade students from two elementary schools in Taipei County. The pretest-posttest nonequivalent group experimental design was adopted as the research method.

研究对象为台北县两所国小的四年级学生，实验设计采不等组前后测设计来进行教学研究。

The "nonequivalent group pretest-post" quasi-experimental design was used for the study.

本研究方法采「不等组前测－后测」之准实验设计，以国立彰化高级中学90学年度二年九班44人及二年十五班46人，共90名学生为研究对象，依序分为实验组、控制组，实施为期七周14小时的实验教学。

This research employed the pretest-posttest nonequivalent group experimental design.

实验组学生接受「挫折容忍力方案」后，在「挫折容忍力总量表」之

Chitosan had been modified by polyacrylate sodium, glularaldehyde, and NaBH4, respectively, which afforded three kinds modified chitosan: polyacrylate sodium modified chitosan (CIS- PA4) chitosan bead and pentamethylene diamido crosslinked chitosan bead (CTSB- G- Hy). The adsorption properties of CTS-CTSB and CTSB-G-Hy were studied by L25(56) orthogonal experimental design. They show high adsorption activities for Pb2+ in solution. The highest removal efficiency of Pb2+ for CTS-PA4, CTSB and CTSB-G-Hy is 94%, 96% and 93%, respectively. The results showed the adsorption property of CTSB is the highest. The CTSB- G- Hy has good mechanical property, acid-resistance and alkali-resistance.

第二部分壳聚糖的改性及其对水溶液中铅离子的吸附性能研究以壳聚糖为原料制备了三种改性吸附剂——聚丙烯酸钠改性壳聚糖(CTS——PA_4)、珠状壳聚糖凝胶树脂和戊二氨交联珠状壳聚糖凝胶树脂，着重考察了CTSB—G—Hy的制备条件，并考察了三种吸附剂吸附6.3mg/L铅离子水溶液中铅的最佳使用条件，结果表明对CTS—PA_4而言当pb~(2+)溶液的pH在4～6.5之间，吸附剂用量为5g/L，吸附时间为1h时pb~(2+)去除率高于94％，CTS—PA_4可在酸性条件下使用，在碱性条件下依然有效但处理效果较差；CTSB对pb~(2+)具有很好的吸附能力吸附剂用量为5g/L，吸附时间为1h时处理效果极佳，pb~(2+)去除率高于96％；CTSB—G—Hy对pb~(2+)具有一定的吸附能力，吸附剂用量为3g/L，吸附时间为1.5h时处理效果最佳，Pb~(2+)去除率高于93％，而且CTSB—G—Hy的机械强度高，耐酸碱性强，可在较宽的pH范围内使用。

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。