包钢1000万t铁前原料预测

文章对国内外铁料和燃料的资源状况,作了详尽地调研分析.通过对1 000万t产铁规模铁前原料的平衡计算,得出主要原料--铁料和燃料的需求量和缺口量.     

面向业务分析与预测的企业决策支持系统设计

为了提高企业决策自动化管理水平，运用先进的数据仓库和数据挖掘技术，采用请求响应方式以及规范化的接口结构，提出一个企业信息分析及决策系统的设计和解决方案。根据完善的智能化分析手段，有效的保证决策者的经验与决策支持系统的分析和预测能力相结合，并对企业管理者提供科学准确的分析预测和决策支持。系统可实时地为用户提供有效详细的分析数据，从而大大加快决策进程并有效提高准确性。     

基于T-S模糊逻辑推理的非线性预测模型

建立了基于Takagi-Sugeno模糊逻辑推理的局部多元回归模糊模型(LMRF模型)，将其用于具有小样本数据和非线性特点的宏观非线性系统预测。在多维空间下用C-聚类方法划分模糊子空间，采用带3参数的广义高斯隶属函数．提高了预测的精度，后件参数的辨识采用最小二乘法将减少计算复杂度，交通流量预测实例表明，基于T-S模糊推理的局部多元回归模型用于交通系统能准确地表达交通流量与社会经济的复杂关系，相对于多元线性回归预测模型精度要高得多。     

基于DCS—MINICOM网络通信系统的在线实时优化控制

对进口集散控制系统(DCS)进行深开发，提高原有装置的控制水平，实现在线优化闭环实时控制是工业界普遍关注的研究课题。在美国ABB公司制造的MOD-300型DCS基础上，选用DEC公司制造的Alapha-3800小型机为控制与通信平台，通过PHENIX接口软件、Apclopt软件包及Setcim数据库构建了与DCS的网络信息交换系统，实现了装置的在线优化控制。以中石化某厂、阜海发电厂为例叙述了主要实施过程：优化目标函数的确定，变量的选取，数学模型的建立，优化算法与生产预报模型的形成过程。     

"十五"后三年电力供需形势将十分严峻

根据详实的材料分析中国当前电力供需形势。虽然于2003年全国发电量将提前两年达到“十五”计划目标，但现在电力建设规模严重不足。预计“十五”后三年电力供需形势将十分严峻。当务之急是迅速开工建设一批大中型发电项目。     

赣州市五大产业生产方程与组合预测

依据数学和经济学的理论方法，利用赣州市的历史统计数据，对赣州市的农业、工业、建筑业、运输业、商业分别建立生产方程，进而开展组合预测。     

Scaling of energy dissipation in crushing and fragmentation: a fractal and statistical analysis based on particle size distribution

An extensive experimental investigation on concrete specimens under crushing and fragmentation over a large scale range (1:10) – exploring even very small specimen dimensions (1 cm) – was carried out to evaluate the influence of fragment size distribution on energy density dissipation and related size effect. To obtain a statistically significant fragment production as well as the total energy dissipated in a given specimen, the experimental procedure was unusually carried out up to a strain of approximately –95%, practically corresponding to the initial fragment compaction between the loading platens. The experimental fragment analysis suggests a fractal law for the distribution in particle size; this simply means that fragments derived from a given specimen appear geometrically self-similar at each observation scale. In addition, clear size effects on dissipated energy density are experimentally observed. Fractal concepts permit to quantify the correlation between fragment size distribution and size effect on dissipated energy density, the latter being governed by the total surface area of produced fragments. The experimental results agree with the proposed multi-scale interpretation satisfactorily.     

飞机地面试验时模拟环境温度的控制

飞机在进行地面试验时，模拟环境用于模拟飞机在空中飞行时的环境温度。由于存在干扰以及其他未知因素，难以精确建立模拟环境温度的数学模型，从而限制了经典估值理论的应用。本文利用逼近原理，给出了模拟环境温度的广义线性模型和与之相应的广义卡尔曼滤波，实现了模拟环境温度的滤波和温度变化趋势的多点预报和模拟环境的温度控制；文章还给出了模拟环境温度控制的决策原则和控制流程；最后通过2个算例，证明了模拟环境温度广义线性模型对于连续系统应用的广泛适用性和鲁棒性。     

沱茶中茶多酚的分析与鉴定

用索氏提取器以三氯甲烷为萃取剂,在95 ℃下从沱茶中提取茶多酚。用旋转蒸发器将滤液浓缩,有机相中加入三氯甲烷(V(三氯甲烷):V(浓缩液)=3:1)将咖啡因萃取分离、去除。水相中加入乙酸乙脂(V(乙酸乙酯):V(水)=3:1)将沱茶提取物萃取分离。以硅胶G作填充剂,以乙酸乙酯(V(乙酸乙酯):V(乙醚)=4:1)为洗脱剂进行柱层析。用傅里立变换-红外光谱法(FT/IR)测定沱茶提取物待测组分的红外光谱图,提供官能团的有关信息。确定待测组分的可能结构;应用气相色谱-质谱法(GC/MS)对其进行分析与鉴定,由电子电离源质谱(EI/MS)获得待测组分的质谱图和相关数据,进而对子离子裂解途径和特征离子进行辅助解析,确证待测组分为茶多酚。为开发利用沱茶提供了科学依据。     

Tandem mass spectrometry in the study of fatty acids,bile acids,and steroids

Over the last 50 years, the mass spectrometry of lipids has evolved to become one of the most mature techniques in biomolecule analysis. Many volatile and non-polar lipids are directly amenable to analysis by gas-chromatography-mass spectrometry (GC-MS), a technique that combines the unsurpassed separation properties of gas-chromatography with the sensitivity and selectivity of electron ionization mass spectrometry. Less volatile and/or thermally labile lipids can be analyzed by GC-MS, following appropriate sample derivatization. However, many complex lipids are not readily analyzed by GC-MS, and it is these molecules that are the subject of the current review. Since the early 1970s, there have been three outstanding developments in mass spectrometry that are particularly appropriate in lipid analysis; i.e., the introduction of (i) fast atom bombardment (FAB); (ii) electrospray (ES); and (iii) tandem mass spectrometry (MS/MS). The FAB and ES ionization techniques will be discussed in relation to MS/MS, and examples of their application in biochemical studies will be presented. The review will concentrate on the analysis of fatty acids, bile acids, steroid conjugates, and neutral steroids.