最佳值

The effects of acidity, reaction temperature, feeding mode, and rotational speed of the stirrer on the particle size of AC blowing agent were studied. The optimal conditions were obtained as follows: the catalyst composed with m:m(V2O5)=1:1 equal to 1%-2% ratio of the reagent''s mass,reagent reacts at 50℃ under pH=3-4 for 25min with 350～360r/min of the stirrer speed, and the NaClO3 solution must be added from burette.

研究了酸度、反应温度、加料方式、搅拌器的转速对AC发泡剂粒径的影响，最佳工艺条件为：催化剂m：m(V2O5)=1：1的质量约为反应物质量的1%~2%，反应体系的pH值3～4，反应温度控制在50℃左右，氯酸钠溶液(质量分数20%)采用通管滴加的方法加入，整个反应时间约为25min，搅拌器的转速一般控制在350～360r/min。

Preparation of water-borne polyurethane dispersion modified by epoxy resin;2. Preparation and Application of water-borne curing agent from cashew nut shell liquid;3. Synthesis and performance study of water-borne photosensitive PU acrylate PUA

以甲苯二异氰酸酯、聚丙二醇醚(PPG 2 2 0 )和二羟甲基丙酸为原料制备了阴离子型水性PU 乳液，研究了DMPA用量、n /n值、交联剂TMP用量对水性PU 乳液与涂膜性能的影响，得出了制备阴离子型水性PU 的最佳配

The opti mumreaction condition of cellulase was pHvalue of 4.8 and temperature of 60℃.

纤维素酶的最佳反应条件是：pH值为4.8、温度为60℃。

High performance diesel engines operate best with cetane values of 50 or higher.

高性能柴油发动机的运作十六烷值50或更高价值的最佳。

So, an appropriate cetane number should be considered for NOx emissions and smoke opacity reductions.

综合考虑消光烟度和NOx排放，存在一个最佳十六烷值。

It was also found that the decrease of immersion resistance and impedance of the commercial anti-corrosion of poly (vinyl chloride co-isobutyl vinyl ether) coating with increase of directly adding of nano-TiO2, which was elucidated with the theory of critical pigment volume concentration. At last, the optimal coating prescription was gotten as follows: 0.5-1.0g nano-TiO2 B, 25.6g resin, 33.4g xylene, 1.4g chlorinated paraffin, 1.5g 15% slurry of organic bentonite, 0.8g green chrome, 7.7g grey mica ferric oxide and 0.6g non-float aluminum.

直接添加纳米二氧化钛的商品化防腐涂层耐浸泡性能和交流阻抗值随添加量增加而降低，利用临界体积浓度理论等解释了该现象；通过实验获得了如下最佳涂料配方为：0.5-1.0g纳米TiO2，25.6g氯醚树脂，33.4g二甲苯，1.4g氯化石蜡52＃，1.5g 15%有机膨润土浆，0.8g氧化铬绿，7.7g云母氧化铁灰，0.6g非浮型铝粉。

An optimum threshold level is found that minimizes distortion of the power spectrum for speckle data of the circular and ring apertures.

针对具体的圆形和环形散射屏引入的散斑图样，采取使处理前后的功率谱偏差最小的方法，找出了最佳的阈值。

Two sea surface temperature data set were used, i.e., climatologically data and optimal interpolated real time data. The results of air quality simulation obtained by using two dataset are similar.

此一研究还用两种海水面温度资料，一个是气候性的分布，另一个为最佳差值的即时资料，然而两者模拟结果相差不大。

Several cluster validity measures have been proposed for confirming the optimal k value. However, the existing methods may not work well for the following two kinds of data sets: the data set containing cluster groups with different densities and the data set in which the cluster groups are extremely close to each other.

目前，已经提出了许多确定最佳k值的聚类有效性方法，但这些方法都不能很好地处理两种数据集：类密度不同的数据集和类间距比较小的数据集。

When the sodium lauryl sulfate and p-octyl polyethylene glycol phenyl ether is used and its level in 3% and 6: 4 ratio, the polymerization process has the lowest coagulum and the highest monomer conversion. Higher reaction temperature and more level hydroxyl value lead to more coagulum, the latter also lead to larger particle size. The acid value has larger influence on viscosity and coagulum, there exist a best range. The emulsion particle size is larger for its hydrophilicity, most of its particles are connected together.

在含较高亲水单体的乳液聚合体系中，难以制得稳定的预乳化液，不能采用工业生产中常用的预乳化工艺，而只能采用混合单体直接滴加的方法；由于单体混合物的亲水亲油值较高，用阴离子型乳化剂十二烷基硫酸钠和非离子型乳化剂聚乙二醇辛基苯基醚混合，用量为单体总量的3％，且比例在6：4时，乳液聚合时具有最低的凝聚物含量和最高的单体转化率；乳液聚合反应温度升高，可以提高单体转化率，增加反应速度，但凝聚率相应提高；随着羟基单体含量的增加，聚合过程中凝聚率增加，聚合物乳胶粒平均直径增加；羧基单体有一个最佳的用量（2.6％），过高或过低凝聚率均提高；羧基含量对乳液的粘度有较大的影响，当羧基含量较低时，羧基含量增加，乳液粘度增加明显；含羟基乳液粒子由于含亲水基团较多，使得乳胶粒径增大，乳胶粒子大多数互相凝聚在一起，处于凝聚态。

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％。