粉末化

The Company QG chromium carbide hardfacing composite plate, using welding or brazing with metals produced by automatic arc welding alloy powder to add new process methods, the formation of hypereutectic high chromium multi-element alloys superhard wear-resistant layer, can significantly improve easy to wear pieces of equipment and steel production life.

本公司QG碳化铬耐磨堆焊复合钢板，采用焊丝或焊带产生的金属电弧添加粉末合金自动堆焊新工艺方法，形成过共晶高铬多元素合金系超硬耐磨层，可大幅提高易磨损设备及钢板制作件的使用寿命。

The influence rule to powder quality and quantity from some technical parameters such as materials vapor tension, gas pressure, the ratio between hydrogen and argon, current intensity and gas circulate intensity were discussed by single-factor experiment, on the base of which the perpendicularity experiment scheme was arranged.

本文采用压力模型计算出稳定弧光制粉时的气相空间温度在373K以下；从电流密度和电导率角度计算出等离子体电弧场中心温度高达5000-6500K；由此得出弱电离等离子体自由弧的自身温度场即使没有外界强制冷却，在等离子体焰区特征半径(约1.26cm)范围内的温度梯度就可达4787℃/cm，这是电弧等离子体温度场分布高度集中的具体表现，也是纳米金属粉末无须液氮冷却就能生成的本质原因，阐释了等离子体温度场自身的极大温度梯度是金属粉体纳米化的控制机制。

The result showed that the biodegradation rate of calcium phosphates powders decrease in the order: ACP＞α-TCP≈α-TCP/HA＞HA, ACP＞α/β-TCP＞α-TCP＞β-TCP, This indicates that the biodgradation rates of calcium phosphates prepared in this thesis can be tailorable.

实验结果表明：这些粉末的生物体外降解速率由大到小的顺序为：ACP＞α-TCP≈α-TCP／HA（1：1）＞HA，ACP＞α／β-TCP（1：1）＞α-TCP＞β-TCP；纳米结构化复相磷酸钙现示出降解速率可调性和独特性，如α／β-TCP（1：1）的生物体外降解速率大于α-TCP单相。

At first, the broth was acidified, then centrifuged to get mycelia, which was heated and powdered; finally we use acetic ether to soak the powder. After that, the phase of acetic ether was washed using the solution of ammonium sulfate and the solution of ethanedioic acid, then concentrated to gain pulps. It was crystallized at 4℃.The coarse crystals was decolorized by activated carbons, the pure needle crystal of lovastatin was obtained.

发酵液经酸化处理后，离心得到菌体，烘干后过筛得到菌粉；用乙酸乙酯浸泡，乙酸乙酯相需用(NH_4)_2SO_4溶液和草酸溶液洗涤两次；乙酸乙酯相经薄膜浓缩得到浆状物，于4℃结晶，得到粗晶体；再经粉末活性炭脱色和重结晶后得白色针状结晶，为lovastatin的纯品。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。