优选

Ammonium paratungstate has a great effect on the properties of the blue tungsten oxide , and blue tungsten oxide has a great effect on tungsten and tungsten carbide powder also; The tungsten carbide powder of good quality can be made from APT or blue tungsten oxide treated by a special process.

仲钨酸铵对蓝钨性能影响较大，而蓝钨物理性能对钨粉和碳化钨粉的性能影响也较大，通过对APT煅烧前或煅烧后进行特殊处理优选蓝钨原料，可以制取优质碳化钨粉。

The invention relates to a toothbrush head comprising a plurality of substantially peduncular, elastic cleaning elements that are fastened on a cleaning element support, preferably combined to tufts, and project from the support.

本发明涉及一种牙刷头，其包括多个基本杆状的弹性清洁元件(3)，这些清洁元件固定在清洁元件支架(2)上，优选合并成簇(5，6，7)并且从支架突出。

In another preferred form, the top wall (22) is formed from a first portion (22d) having an access opening closed by a closure portion (22e) interconnected by a seal (40) including the peelable closure seal portion (40a) to the first portion (22d).

在另一个优选的实施例中，顶壁（22）有第一部分（22d）形成，所述第一部分（22d）具有由封闭部分（22e）封闭的出口，所述封闭部分（22）与密封区域（40）相互连接，所述密封区域（40）包括设置在第一部分（22d）上的可剥离的封闭密封部分（40a）。

The Pn of Phragmites communis is higher than that of Phalaris arundinacea L, meanwhile Phragmites communis has the higher diurnal photosynthetic capacity, which shows that the Phragmites communis could grow more rapidly, and have higher biomass, so the Phragmites communis could be one of the priority implemental plant.

芦苇的Pn比虉草的Pn高，同时芦苇较虉草有更大的日光合量，说明芦苇相比较长势更快，生物量更高，当年栽植当年见效，在湿地生态系统人工修复中可作为优选工具植物之一。

OBJECTIVE: To optimize the extraction technology of thrombolytic components predominantly as corilagin from Phyllanthus urinaria.

目的：优选叶下珠中以柯里拉京为主的溶栓成分的提取工艺。

Then, concerning the difficulty of ascertaining hysteresis time of piezometric tube, Genetic Algorithm-Radial Basis Function Neural Network model is developed according as the method that reservior level is rectilinear correlation with piezometric tube level, which not only could be calculated by computer but also is showed logical and feasible.

针对以往监测模型预测精度难以保证的的问题，本文在分析比较了几种土石坝安全监测预报模型的基础上，提出了一种新的安全监测预报模型——遗传回归模型，该模型通过遗传染色体对建模因子进行优选，并在适应度函数中综合考虑模型拟合精度与预测精度平衡。

Orthogonal test was adopted to optimize extraction process of alkaloids from plumula nelumbinis.

以紫外分光光度法测定生物碱的含量，采用正交实验法对莲子心的提取工艺进行优选。

The optimum technology of extracting flavonoids in polygonatum was studied by orthogonal test.

用正交试验法对玉竹中的黄酮类化合物的提取工艺进行了优选研究，采用正交表L16(4^5)，以提取时间、提取温度、提取次数、提取剂中乙醇含量以及料液比为因素，以总黄酮显色液的吸光度为指标进行试验。

Methods The α-factor prepro peptide from Saccharomyces cerevisiae was used as a signal peptide to secret HBsAg in Hansenula polymorpha. Both MFα and HBsAg genes were designed based on Hansenula polymorpha-preferred condons and synthesized by overlap PCR respectively, then fused together by PCR using a pair of primers.

在HBsAg基因前加酿酒酵母α前导肽基因序列作为信号肽，将整个序列优化为汉逊酵母优选密码子，采用搭桥PCR方法分别合成后，通过1对引物PCR法融合在一起。

The experiment studies production craft of millet milk, and how to solve stability , preservability and other key craft parameter of products, then setting up mathematics model between the stablizers;.Studed on the fermented millet milk craft on this basis , we confirm the best matching of the fermentation adjunct through sense organ , physics and chemistry evaluate.

本实验主要研究米奶的生产工艺，并对如何解决产品的稳定性、保藏性等关键工艺参数进行系统的研究，从而对所用稳定剂之间的相互作用建立了数学模型；在此基础上进行发酵米奶工艺的研究，重点进行了发酵剂的优选，通过感官、理化等综合评定，确定了发酵剂的最佳配比。1。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。