多糖—用于硫化矿物优先浮选的天然无毒调整剂

进行的吸附试验用来为阐明糊精和硫化矿之间的相互作用。硫化矿如方铅矿和六方硫镍矿，在与Ｐｂ（ＯＨ）２，Ｎｉ（ＯＨ）２等电点一致的ｐＨ值范围内显示了强吸附力，并且认为是化学作用。就硫化铜矿吸附而言属于弱吸附类型，并且遵循不同的模式。有关石墨的吸附研究证实了金属杂质充当吸附中心的化学作用机理，依照已提出的机理，方铅矿与黄铜矿，六方硫镍矿与辉铜矿均取得了选择性分离。     

多项式系数的黎卡提方程组具有某类流动极点的充分条件(续完)

本文继续对部分系数恒为零的多项式系数的一类黎卡提方程组,论证了它的解具有某类流动极点的充分条件。     

1—10月份固定资产投资增长24．1％

10月份，国有及其他经济类型单位完成固定资产投资3081亿元，同比增长23．0％，比9月回落1．7个百分点，主要是由于基本建设投资增幅回落所致。当月基本建设投资增长21．2％，比9月回落6．9个百分点。     

一种新型针刺延期药的研制及其应用

本文介绍了一种新型的针刺延期药的配方设计和制备工艺，这种低猛度高热量的针刺延期药具有较高的发火感度，可满足一定的延期时间和相容性要求。文中还介绍了它在几种小型针刺延期雷管中的应用。     

Effect of Thickness on the Structure and Tribological Properties of MoSx Coating

MoSx coatings were prepared by bipolar-pulse DC unbalanced magnetron-sputtering system with the variation of coating thickness at different Ar pressures.The composition and surface morphology were determined by using energy dispersive X-ray and scanning electron microscopy;the structural characterization was analyzed by X-ray diffraction.The friction and wear properties were investigated by fretting tests in air with less than 10% and 50% relative humidity.At 0.40 Pa pressure,(002) basal plane orientation was formed throughout the coatings.At 0.88 Pa and 1.60 Pa pressures,(002) basal plane orientation was only noticed in the first stage of coating growth(around 0.20 μm in thickness), and then edge orientations with their basal planes perpendicular to the surface would be evolved in the coatings.Humidity has a minor influence on the coatings that have(002) basal plane orientation,whereas the tribological properties of MoSx coatings with edge orientations are greatly affected by humidity.The mechanisms of coating growth and friction and wear processes are discussed.     

GB/T 228-2002金属材料室温拉伸试验方法

1 范围 本标准规定了金属材料拉伸试验方法的原理、定义、符合和说明、试样及其尺寸测量、试验设备、试验要求、性能测定、测定结果数值修约和试验报告.