电解锰粉的物理测试

用X射线衍射(XRD)法研究了电解锰粉中MnO_2的晶型。对确定为γ—MnO_2的锰粉做了化学成份、差热曲线、比表面积和比重测定,探讨了γ—MnO_2的鉴定问题。     

结构控制二次型目标权函数及Riccati方程解法

本文应用现代控制理论。着重研究了结构控制的二次型目标函数中的权函数求法及Riccati方程降阶法,详细研究了控制力所产生的系统阻尼增益及刚度增益的性质。     

多层钢筋混凝土结构的概率弹塑性抗震设计

确定了多层钢筋混凝土结构层恢复力模型(光滑模型)参数与结构层间主要设计参数的关系;进而在结构弹塑性随机动力分析的基础上,以变形与滞回耗能的线性组合定义结构的破损度,提出了多层钢筋混凝土结构在随机地震动作用下的期望破损度设计和可靠性设计方法。最后给出了一栋八层房屋的分析设计算例。     

Sol-gel synthesis and photoluminescence of LaPO_4:Eu~(3+) nanorods

Monoclinic LaPO4 nanostructures with uniform rod shape have been successfully synthesized by a simple sol-gel method.The procedure involves formation of homogeneous,transparent,metal-citrate-EDTA gel precursors,followed by calcination to promote thermal decomposition of the gel precursors to yield the LaPO4 nanoparticles.Their morphologies and structures were characterized by XRD,TEM,TG-DSC and HRTEM.The results indicate that single monoclinic phase LaPO4 nanorods are readily obtained at 800 ℃ within 3 h.Furthermore,photoluminescence(PL) characterization of the Eu3+-doped LaPO4 nanocrystals was carried out.The effects of calcination temperatures and Eu3+ doping content on the PL properties were elaborated in detail.Room-temperature photoluminescence(PL) characterization reveals that the optical brightness as well as the intensity ratio of 5D0-7F1 to 5D0-7F2 is highly dependent on the calcination temperature,and the Eu0.05La0.95PO4 nanophosphor shows the relatively promising PL performance with the most intense emission.     

CALCULATION MODEL OF SURFACE TENSION FOR ALLOY MELTS

１ＩＮＴＲＯＤＵＣＴＩＯＮＩｔｉｓｏｆｇｒｅａｔｉｍｐｏｒｔａｎｃｅｆｏｒｔｈｅｅｓｔｉｍａｔｉｏｎｏｆｓｕｒｆａｃｅｔｅｎｓｉｏｎｆｏｒａｌｏｙｍｅｌｔ．Ｍａｎｙｍｅｔａｌｕｒｇｙｐｈｅｎｏｍｅｎａ，ｓｕｃｈａｓＣＯｂｕｂｂｌｅｓｇｅｎｅｒａｔｉ...     

一种自焙炭块的导热系数

利用激光脉冲法、铜卡量热计法和浸渍法分别测定了不同石墨化度的自焙炭块的热扩散系数α、恒压比热容ｃｐ和体积密度Ｄｂ，并据λ＝Ｄｂｃｐα求出２００～１１００℃该炭块的导热系数λ。结果表明：原始自焙炭块的λ值随温度升高而增大，这可能是由于测试过程中石墨化度随温度升高而明显增加，且λ值与石墨化度成正比所致；恒温下，λ值随石墨化度增加而增大；在石墨化度较高时，λ值随温度升高而稍有降低。当石墨化度在０．７以上时，国产自焙炭块的λ值接近美国ＵＣＡＲ炭砖的值     

线材轧机连轧系数的确定

通过对连轧机孔型的调整，合理确定连轧参数，解决堆拉问题。     

中间仓库自动化系统开发与应用

介绍了存储各种石油套管及管坯的大型无人自动化仓库控制系统的硬件结构、软件功能及控制思想。该系统运行可靠、具有广泛的通用性和较大的推广价值     

Electrochemical behavior of Cu in the (NaCl-KCl-CuCl) molten salt

The electrochemical reaction mechanism and electrocrystallization process of Cu on copper electrode in the eutectic NaCl-KCl-CuCl molten salt were investigated by means of cyclic voltammetry, chronopotentiometry and chronoamperometry technique at 710 C. The results show that the electrochemical reaction process of Cu is a quasi-reversible process mix-controlled by Cu + diffusion rate and electron transport rate; the electrochemical reduction mechanism is Cu + +e→Cu; the electrocry stallization process of co...     

YA79液压机的改造

分析液压机存在的主要问题，阐述了对其进行技术改造的过程及主要结构特点。