企业MIS的投资估算与综合效益分析

有关ＭＩＳ建设资金的投入与综合效益的产出是企业决策者最为关心的主要问题之一，而系统的投资估算与效益分析蝇一个比较复杂的问题。本文采用定性及定量分析的方法，从社会效益及经济效益两方面对系统的综合效益做了初步的分析，并给出了一个较为实用的系统投资估算的方法。     

基于高阶累积量矩阵组正交联合对角化的高分辨方位估计方法

该文提出了一种基于高阶累积量矩阵组正交联合对角化的高分辨方位估计方法。该方法构造了一组高阶累积量矩阵共同来辨识阵列流型矩阵的列空间,进而进行DOA估计。并通过对高阶累积量矩阵组进行联合对角化,得到联合对角化矩阵和对角化后的矩阵组,并重新定义了空间谱。新方法可以处理相干声源,适用于有色噪声环境,且较仅使用单个高阶累积量矩阵的算法具有更高的分辨力,更低的均方根误差和更高的鲁棒性。     

一类非线性微分差分方程解的振动性线性化

首先用特征方程方法研究线性差分方程解的振动性，然后以此为基础，在一定条件下把一类非线性微分差分方程解的振动性归结到一类简单线性微分差分方程的振动性。     

磁传动高压静密封阀门的研制

介绍了磁力传动高压静密封阀门的工作机理，磁路结构及材料对磁力耦合器传动力矩的影响，磁耦合力矩的温度特性．研制了根除泄漏的磁传动阀门，并在高温、高压、易燃、易爆、剧毒的生产装置中应用成功。     

当前我国金融业改革面临的难点及其对策

我国金融体制改革由于商业银行体系尚未确立，中央银行的货币政策等宏观金融政策机制不全，金融市场不完善，从业人员的素质低等原因，其进展受到影响。为把金融体制改革按目标进行下去，必须从存在的问题入手，找出解决的途径。本文从当前我国金融业改革面临的难点的分析入手，提出解决问题的建议措施。     

Voltammetric study of fullerene C60 and fullerene C60 nanotubes with sandwich method

Two sandwich-type electrodes (RTIL/C₆₀/SWNT/GCE and RTIL/C₆₀ nanotube/SWNT/GCE) with fullerene C₆₀ or fullerene C₆₀ nanotubes interlayer covered by room temperature ionic liquid (RTIL) membrane on single-walled carbon nanotubes (SWNTs) modified glassy carbon electrode (GCE) surface were fabricated. Cyclic voltammetry and differential pulse voltammetry were used to characterize their electrochemical behaviors and the difference between fullerene C₆₀ and fullerene C₆₀ nanotubes was investigated and the reason was presumed for the first time. It has been observed that 4 pairs of quasi-reversible redox peaks occurred at the RTIL/C₆₀/SWNT/GCE, while only two peaks at the RTIL/C₆₀ nanotube/SWNT/GCE. The cathodic and anodic peak potentials did not shift with the change of pH, indicating that no protons were involved in the electrode reaction processes. So the redox reaction of the fullerene C₆₀ or fullerene C₆₀ nanotubes could be considered as a multi-step one-electron transfer process and fullerene C₆₀ behaved like an electron accumulator to accept and release electrons. While, the reductive products of fullerene C₆₀ nanotubes could not be oxidized again in the reverse scan and the electrode process was irreversible. The fullerene C₆₀ monomer released the accumulated electrons more easily than the fullerene C₆₀ nanotubes. The electrochemical behaviors showed that the electrochemical processes at both electrodes were adsorption-controlled processes.     

柴河电厂设备运行状态显示仪的研制和使用

柴河电厂研制和使用了设备运行状态显示仪,将各种设备的运行状态集中显示在中央控制室,运用设备运行状态显示仪,提高了故障(或事故)的处理速度,为实现微机自动化管理作了前期工作。     

Dynamic expression of matrix metalloproteinases (MMP-2, -9 and -14) and the tissue inhibitors of MMPs (TIMP-1, -2 and -3) at the implantation site during tubal pregnancy

Matrix metalloproteinases (MMPs) are responsible for extracellular matrix (ECM) degradation, and their functions are regulated by tissue inhibitors of MMPs (TIMPs). The evidence for the roles of MMPs and TIMPs in implantation and placentation has remained insufficient in humans, especially during the early stages. Tubal pregnancy has some similarities to normal intrauterine pregnancy and therefore may provide a unique model for implantation studies. In the present study, the expression of MMP-2, -9 and -14, and TIMP-1, -2 and -3 at the feto-maternal interface during tubal pregnancy was examined by immunohistochemistry and in situ hybridization. We found that MMP-9 and TIMP-1, -2 and -3 are produced by all types of extravillous cytotrophoblast (EVCT) cells, while MMP-2 and -14 mainly exist in distal column cytotrophoblast (CCT) cells and invasive EVCT cells. Meanwhile, the intensity of MMP-14 and TIMP-1 and -2 increased along the invasive pathway toward maternal interstitium. In addition, MMP-2, -9 and -14 and TIMP-1, -2 and -3 were all detected in the villous CT (VCT) cells. Furthermore, both the mRNA level and immunoreactivity of MMP-9, TIMP-1 and -3 increased, while those of TIMP-2 decreased concurrent with the progression of pregnancy during weeks 3-9. The unique expression pattern of various MMPs and TIMPs at the feto-maternal interface suggests that they may have roles in regulating the controlled invasion of trophoblasts during implantation and placentation. Meanwhile, the study provides a better understanding of the mechanisms involved in cellular events during human pregnancy, especially at the initiation stage of implantation.     

《钢铝复合用钢带》标准综述

简要介绍了钢铝复合用钢带的发展和技术要求,并研究了新标准的制定情况。     

活性炭选择性催化还原NOx

采用活性炭作催化剂,NH3为还原剂,进行活性炭脱硝机理的实验研究.分别考察了烟气组分、温度、活性炭的比表面积及不同材质对NOx去除率的影响.结果表明:活性炭作为单纯的吸附剂,其NO吸附容量较小,O2的加入使吸附容量增大,NH3与O2同时存在则可达到最佳去除效果,H2O的存在不利于活性炭的催化作用;温度在200℃时,活性炭催化活性达到低谷;煤质活性炭催化效果优于木质;在一定范围内,比表面积的增大有利于催化活性的提高.利用SEM对所用不同样品进行扫描,进一步分析活性炭表面结构对吸附催化效果的影响.