人因在企业管理信息系统开发中的应用研究

本文围绕企业开发建设管理信息系统（MIS）问题,分析并论证了企业与该项工作相关的各类人员在MIS系统建设中的地位和作用,以及对开发建设企业MIS系统的产生的影响。指出企业建设MIS系统不仅仅是一个技术问题,还有许多人文因素在起作用,是一个人员、技术、组织管理三者协调发展的过程。     

高炉专家系统的开发与应用

总结了国内外高炉操作过程控制及专家系统开发历程,介绍了有关高炉相关专家系统基本状况及应用情况.     

基于TPMS的多孔结构力学性能研究

为探究不同TPMS孔隙结构对多孔支架力学性能的影响,采用隐函数表达的TPMS作为构建微观多孔结构的基础孔隙单元,通过定义距离函数构建不同结构特征的TPMS多孔支架,并应用SLM制备了 AlSi10Mg多孔支架;采用有限元法分析和力学试验方法,研究不同孔隙结构特征对多孔TPMS支架力学性能的影响,分析不同距离函数k值对P...     

TIZS区域选择性连锁模块

介绍了一种在框架断路器和热磁式塑壳断路器之间实现全选择性的装置.当电网出现短路故障时,可在低压电网各级断路器之间实现选择性跳闸,提高了断路器选择性保护的可靠性,使供电系统具有较高的安全性和可靠性,确保无故障支路连续供电.     

Structure and Electric Conductivity of Ce-doped Bi_2O_3 Electrolyte Synthesized by Reverse Titration Chemical Coprecipitation

Ce-doped Bi_2O_3 nanopowders were prepared by reverse titration chemical coprecipitation from Bi~(3+)and Ce~(4+)containing aqueous solution.Techniques of X-ray diffraction(XRD),transmission electron microscopic(TEM)and Fourier transform infrared spectroscopy(FTIR)were employed to characterize the as-synthesized materials.The XRD patterns indicated that the peaks can be easily indexed toβ-Bi_2O_3 and no diffraction peaks of Ce or other impurity phases were detected in the prepared samples.The calculated average crystalline size decreased from 31.72 to 11.96 nm when the Ce content increased from 1 wt%to 10 wt%.The morphology changed from flake-like into the spherical-like with increase in Ce content.The electric conductivity of Ce-doped Bi_2O_3 electrolyte was also investigated by two probe DC method.Conductivity analysis exhibited that the rate of conductivity increased with increasing Ce~(2+)ratio,when the Ce concentration was up to 5 wt%,the as-synthesized Ce-doped Bi_2O_3 electrolyte showed the maximum value of conductivity(0.295 S?cm~(–1)).     

Structure and Electric Conductivity of Ce-doped Bi<Subscript>2</Subscript>O<Subscript>3</Subscript> Electrolyte Synthesized by Reverse Titration Chemical Coprecipitation

Ce-doped Bi₂O₃ nanopowders were prepared by reverse titration chemical coprecipitation from Bi³⁺ and Ce⁴⁺ containing aqueous solution. Techniques of X-ray diffraction (XRD), transmission electron microscopic (TEM) and Fourier transform infrared spectroscopy (FTIR) were employed to characterize the as-synthesized materials. The XRD patterns indicated that the peaks can be easily indexed to β-Bi₂O₃ and no diffraction peaks of Ce or other impurity phases were detected in the prepared samples. The calculated average crystalline size decreased from 31.72 to 11.96 nm when the Ce content increased from 1 wt% to 10 wt%. The morphology changed from flake-like into the spherical-like with increase in Ce content. The electric conductivity of Ce-doped Bi₂O₃ electrolyte was also investigated by two probe DC method. Conductivity analysis exhibited that the rate of conductivity increased with increasing Ce²⁺ ratio, when the Ce concentration was up to 5 wt%, the as-synthesized Ce-doped Bi₂O₃ electrolyte showed the maximum value of conductivity(0.295 S·cm^–1).     

凹凸棒石/稻壳活性炭复合材料的制备及对阳离子黄X-GL的吸附性能

以凹凸棒石和稻壳为原料,氯化锌为活化剂制备了凹凸棒石/稻壳活性炭(ATP/RHAC)复合材料,研究了凹凸棒石与稻壳质量比、浸渍比、活化温度、活化时间等制备条件对复合材料吸附性能的影响.结果表明:当凹凸棒石与稻壳质量比为1:1、浸渍比为2:1、活化温度为500℃、活化时间为1h时制备的复合材料吸附性能较好,对阳离子黄X-...     

变时基采样锤击法高精度传递函数的估计

传统锤击法试验模态分析时面临着高采样率带来噪声干扰、频率分辨率不足的问题，应怀樵等人发明了对力锤信号使用高采样频率、对响应信号采用较低采样频率的变时基采样技术（VTB），一定程度上改善了测试结果，但仍然存在变时基采样设置不灵活，传递函数在固有频率半功率带宽里分辨率不足、精度不高的问题。基于连续傅里叶谱变换、Chirp-z变换方法，提出一种新的锤击法变时基传递函数高精度估计方法，可很好地解决传统变时基技术存在的问题。并采用数值模型、悬臂梁现场测试进行验证，结果表明所提出的算法优于传统等时间间隔采样技术，比传统变时基技术更为灵活，得到的传递函数质量较好，使得变时基采样技术具有较高的识别精度，可解决高采样率与频率分辨率不足的问题。