莲心中可溶性成分的有效提取

采用不同的原料处理,改变提取的流程和提取时间，测定不同条件下所得提取液的可见吸收光谱，以此反映各提取液的组分和浓度是否发生变化，并比较在最大吸收波长下各提取液的吸光度大小，从而确定将莲心捣碎后，加热回流时间为60min的提取方法效果最佳。     

长距离管线监测系统的一种智能化过流防护方法

介绍了长距离管线监测系统的一种智能化过流防护方法，详细说明其电路设计原理及相关元件的选择，并与串联自复过流保护元件方式相比较，分析其整体性能，说明其具有响应速度快，安全可靠等特点。     

Synthesis, Characterization, and Formation Process of Na-X Zeolite from Coal Fly Ash

Using the SiO₂ and Al₂O₃ components of the amorphous phase in coal fly ash (Fa), Fa was converted to Na-X zeolites in NaOH-NaAlO₂ solutions by stirring at 35°C for 72 hr and then aging at 85°C for a given period. The molar ratio SiO₂/Al₂O₃ of the starting materials was controlled from 2.0 to 13.2. The resulting materials were characterized by various means. Increasing the SiO₂/Al₂O₃ ratio of the starting material increased the degree of crystallinity of faujasite, exhibiting a maximum at SiO₂/Al₂O₃ = 8.0. The faujasite formed was identified as Na-X zeolite with Si/Al = 1.20. The amorphous phase in Fa was dissolved during the stirring to form a precursor of zeolite, such as amorphous aluminosilicate. The Na-X zeolite was formed by aging for 24 hr, and the degree of crystallinity of this material was increased with the increasing aging period. The cation exchange capacity and specific surface area were increased with the increasing degree of crystallinity of the Na-X zeolites.     

Introduction of a nonlinearity measure for principal component models

Although principal component analysis (PCA) is an important tool in standard multivariate data analysis, little interest has been devoted to assessing whether the underlying relationship within a given variable set can be described by a linear PCA model or whether nonlinear PCA must be utilized. This paper addresses this deficiency by introducing a nonlinearity measure for principal component models. The measure is based on the following two principles: (i) the range of recorded process operation is divided into smaller regions; and (ii) accuracy bounds are determined for the sum of the discarded eigenvalues. If this sum is within the accuracy bounds for each region, the process is assumed to be linear and vice versa. This procedure is automated through the use of cross-validation. Finally, the paper shows the utility of the new nonlinearity measure using two simulation studies and with data from an industrial melter process.     

软件构件技术在管理信息系统中的应用

软件构件技术是一种前沿的软件设计思想，其方法与传统的软件制作方法有很大区别．通过介绍软件构件技术在开发管理信息系统的应用，与其它软件制作方法进行比较，得出这样的结论：在软件编制中应用这种思想，不仅能大幅度地加快软件的开发速度，而且对整个软件行业的发展有着至关重要的推动作用。     

加氢处理润滑油基础油各组分对光安定性的影响

将经紫外光照前后的加氢处理润滑油基础油分离为饱和烃、轻质芳烃、中质芳烃、重质芳烃和极性组分，分别采用薄层色谱、质谱和紫外吸收光谱分析了各组分的烃组成、硫和氮含量的变化，并通过将从原料油中分离出的各组分反加到光安定性好的饱和烃中，试验验证了加氢处理润滑油基础油中的重质芳烃和极性组分是光不安定组分，其中含有硫、氮的芳香杂环化合物光安定性差。     

一种新的变步长ICA自适应算法

结合互信息极小的优化判据，基于估计函数期望平方准则、外点法和最速下降法的思想，本文导出了一种新的变步长独立分量分析(ICA)自适应算法。该算法克服了固定步长在分离矩阵推导过程中出现的稳态失调问题，比基于模拟退火步长的ICA算法有更快的仞始收敛速度和较高的分离精度。同时，该算法还具有较好的时变系统跟踪能力。理论分析和仿真计算结果证实了其可以有效地提高ICA的自适虚性，更准确地完成盲信号分离。     

基于复数主成分分析的磁共振波谱信号衰减系数的自动校正

衰减系数的校正是磁共振波谱信号处理和分析过程中的一个关键难题。本文基于复数主成分分析，提出了一种自动的磁共振波谱衰减系数的校正方法，较成功地解决了这个难点问题。文中的模拟数据及其实现结果充分验证了该方法的有效性。     

高可靠性烧结金属丝网防爆元件的应用研究

烧结金属多孔元件作为隔爆元件的应用，很好地满足了火焰过滤元件的性能要求，进一步拓宽了烧结金属多孔元件的应用领域，章在论述其性能特点、结构类型的同时，对其在微孔结构设计上的差异也进行了描述。     

汽车钢淬透性数学模型建立

在测定 2 0CrMnTi、4 0MnBH、2 0MnVBH钢淬透性及试样的化学成分基础之上 ,利用计算机采用逐步回归分析方法进行了回归运算 ,得到淬透性与化学成分的关系———回归方程 ,根据回归方程求出了不同窄淬透带规格所对应控制的化学成分范围