最佳性

In chapter 5,we persue the ctiticality and complexity of thecritical sets.We describe carefully the Whitney's example in 1935.Meantime,we introduce some rsults about the critical sets and thecritical value sets,in particular,on W-sets and C-sets.And usingthe Lebesgue density theorem and the Vitali covering lemma weprove a rank zero theorem with Hausdorff measures.Finally wegive some examples to prove our results are sharp in the sense thatthe numbers k,m,n,s,〓,etc.,in the hypothesescan not be improved.

第五章研究临界点集的临界性和复杂性，并详细地描绘了Whit-ney在1935年的例子，同时也介绍了关于临界点集和临界值集的一些结果，尤其是W-集和C-集的一些结果，并利用Lebesgue密度定理和Vitali覆盖引理证明了一个与Hausdorff测度相关的秩零定理，最后举例证明我们的结果在定理的假设中的那些数字如k，m，n，s，a，r+/等不能被改进的情况下是最佳的。

In order to increase directivity and efficiency ,the optimum culture medium components were made certain according to breeding methods.

为了提高筛选的定向性和效率，根据育种思路确定了最佳培养基的配方。

It can obtain optimum running and dissolubility of material.

它可以取得的最佳运行和溶解性物质。

The influence of each condition on the reaction speed and yield was studied, and the optimal conditions were: the ratio of the amount of substance of aromatic amine and heptafluoro-isopropyl iodine was 1:1.1~1.5, the amount of substance of sodium dithionite, sodium bicarbonate, aniline compounds were respectively 1.1~1.3, the amount of substance of phase transfer catalyst TBAB and aniline compounds was 0.05~0.1, the concentration of aniline compound was 0.5~1.0 mol/L, reaction temperature was 10~20 ℃, and the solvent was aether.

最佳结果为：芳胺与七氟异丙基碘的物质的量比1：1.1~1.5，连二亚硫酸钠、碳酸氢钠与苯胺的物质的量分别为1.1~1.3，相转移催化剂四丁基溴化铵与苯胺的物质的量比在0.05~0.1，溶剂总用量使苯胺浓度在0.5~1.0 mol/L；反应温度10~20℃；溶剂采用乙醚。取代基供电子性越强，反应时间越短，产率越高；氨基的对位优先反应，氨基的邻位较难发生反应；且七氟异丙基总是优先取代在芳环电子云密度较高的位置上。

From theoretical aspect, our method can make the entropy value of sort results decrease, and the divisibility of optimal set of discriminant vectors strengthen.

理论上的分析和实验结果表明，这种方法可以使熵值减小，即分类结果的可分性增加，并且最佳鉴别向量集的分离能力得到增强，提高了分类效果。

"The idea was to see if you can change the gameplay to keep people at an optimal level of arousal," says Dr Dix.

Dix博士说，"这样做的思想是看你能否转变游戏性，以保持玩家在最佳的状态"。

Results: The best conditions were temperature: 45 ℃, time: 1.5 hour, pressure: 25 MPa, and concentration of the first entrainer: 900 ml/L.

结果 超临界CO2流体萃取白花丹参中脂溶性成分的最佳条件为萃取温度45℃，萃取时间1.5h，萃取压力25 MPa，乙醇浓度900 ml/L。

This indicates that the freezing resistance in Euonymus japonicus leaves can be improved through spraied pretreatment with three cold resistant agents.

这表明3种抗寒保护剂均能不同程度增强大叶黄杨叶片抗冻性，其中Ca(上标 2+)作用效果最佳。

Results Symptoms such as cough, sputum expectoration and exertional dyspnea alleviated significantly during the first 2 weeks.

大环内酯类抗生素对DPB有十分明显的治疗作用，长期服用耐受性好，其作用机制及最佳药物、剂量、疗程等尚待进一步阐明。

The variable of cooperation is highly explainable to the job characteristics, the next is the variables of autonomy and diversity.

其中合作性的工作特性有最佳的解释力，其次分别为自主性及多样性的工作特性。。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。