OLAP在联通经营分析系统中的应用

OLAP是一种多维展示数据的技术,经常被用在数据仓库的前端报表展现。论文针对联通经营分析OLAP部分报表的需求,提出了一种由数据仓库到OLAP服务器的一套完整地解决方案,并对其中的关键技术的实现进行了阐述。详细讨论OLAP搭建的体系结构,以及与OLAP对应的数据仓库的分层结构,并就多维数据模型设计进行了一些探讨。     

数据仓库应用管理系统的设计与实现

在论述数据仓库 ,数据挖掘思想的基础上 ,以医疗保险领导办公管理系统为例 ,简要介绍了系统的功能分析和系统的工作原理 ,详细论述了系统数据仓库逻辑结构的设计和系统平台的实现方法 ,给出了基于数据仓库技术的信息管理系统的设计与实现方法 ,为读者提供了一种有效的 DSS(决策支持系统 )应用解决方案。     

Pressure and temperature analyses using GOTHIC for Mark I containment of the Chinshan Nuclear Power Plant

Chinshan Nuclear Power Plant in Taiwan is a GE-designed twin-unit BWR/4 plant with original licensed thermal power (OLTP) of 1775 MWt for each unit. Recently, the Stretch Power Uprate (SPU) program for the Chinshan plant is being conducted to uprate the core thermal power to 1858 MWt (104.66% OLTP). In this study, the Chinshan Mark I containment pressure/temperature responses during LOCA at 105% OLTP (104.66% OLTP + 0.34% OLTP power uncertainty = 105% OLTP) are analyzed using the containment thermal-hydraulic program GOTHIC. Three kinds of LOCA (Loss of Coolant Accident) scenarios are investigated: Recirculation Line Break (RCLB), Main Steam Line Break (MSLB), and Feedwater Line Break (FWLB). In the short-term analyses, blowdown data generated by RELAP5 transient analyses are provided as boundary conditions to the GOTHIC containment model. The calculated peak drywell pressure and temperature in the RCLB event are 217.2 kPaG and 137.1 °C, respectively, which are close to the original FSAR results (219.2 kPaG and 138.4 °C). Additionally, the peak drywell temperature of 155.3 °C calculated by MSLB is presented in this study. To obtain the peak suppression pool temperature, a long-term RCLB analysis is performed using a simplified RPV (Reactor Pressure Vessel) volume to calculate blowdown flow rate. One RHR (Residual Heat Removal) heat exchanger is assumed to be inoperable for suppression pool cooling mode. The calculated peak suppression pool temperature is 93.2 °C, which is below the pool temperature used for evaluating the net positive suction head of pumps of the RHR system and the Emergency Core Cooling Systems (96.7 °C). The peak containment pressure and temperature are well below the design value (386.1 kPaG and 171.1 °C). Containment integrity of Chinshan Plant can be maintained under the SPU condition.     

基于Agent的智能决策支持系统

针对传统DSS的不足，把专家系统和范例推理技术以及数据仓库、数据挖掘技术运用于DSS中，把传统的DSS改进为IDSS，鉴于agent技术构件重用等特点，把agent技术运用到IDSS中，提出了一个实现基于agent技术的IDSS框架，最后探讨了系统实现的主要技术。     

基于GIS-AHP的建筑废弃物消纳场选址优化研究——以广州市番禺区为例

随着我国城市化进程的加快,新建建筑和拆迁改造项目产生了巨量废弃物。如果建筑废弃物消纳场场址选择不当,就会对环境、社会和经济造成重大的影响。为此,结合AHP-Entropy方法,利用GIS技术,使用整数规划建立建筑废弃物物流回收网络,以广州市番禺区为例,构建选址优化模型,确定了番禺区内最适宜建设消纳场的位置。综合考虑了与消纳场建设和运营有关的各项成本,确定了消纳场的理想数量和建议容量。建筑废弃物消纳场属于邻避型设施,因此建设时要考虑当地居民对建设消纳场影响,研究结果可以为政府管理部门规划建筑废弃物物流管理链,以及为消纳场选址等方面提供参考。     

Characterization,pretreatment and saccharification of spent seaweed biomass for bioethanol production using baker's yeast

Seaweeds are marine macroalgae found abundantly and viewed as potential source of phycocolloids to produce biofuel. In this study, seaweed spent biomass obtained from alginate production industry and biomass obtained after pigment extraction were found to contain a considerable amount of phycocolloids. These two spent biomasses were investigated for the production of ethanol. In this study, the red seaweed spent biomass of Gracilaria corticata var corticata showed higher content of polysaccharide (190.71 ± 30.67 mg g⁻¹ dry weight) than brown seaweed spent biomass (industrial) (136.28 ± 30.09 mg g⁻¹ dry weight). Hydrolysis of spent biomasses with different concentrations of sulfuric acid (0.1%, 0.5% and 1%) was also investigated. Brown seaweed spent biomass and red seaweed spent biomass exhibited high amount of sugar in 0.5% and 1% sulfuric acid treatment, respectively. Proximate and ultimate composition of seaweed spent biomasses were analysed for energy value. The FT-Raman spectra exhibited similar stretches for both acid hydrolysed spent biomasses with their respective standards. Ethanol produced through a fermentation process using spent hydrolysates with baker's yeast at pH 5.3 was found to be significant. The ethanol yield from brown seaweed spent biomass and red seaweed spent biomass was observed to be 0.011 g g⁻¹ and 0.02 ± 0.003 g g⁻¹ respectively, when compared with YPD (0.42 ± 0.03 g g⁻¹) and d-galactose (0.37 ± 0.04 g g⁻¹) as standard on day 4. The present study revealed the possibility of effective utilization of spent biomass from seaweed industry for ethanol production.     

基于CAE技术的单体液压支柱油缸部件分析

在介绍了DW型单体液压支柱的结构和工作原理的基础上,通过Pro/E软件平台实现了DW16-300/100单体液压支柱的参数化设计,并对其油缸部件进行了局部的受力分析。针对单体液压支柱在不同的工况情况下,利用ANSYS11.0对油缸进行强度有限元分析,得出油缸的结构位移和应力分布变形情况。结果表明,有限元分析结果和力学计算结果基本保持一致,通过对比分析,可为单体液压支柱油缸的优化设计和研究提供理论依据。     

二进制传感器网络加权目标跟踪算法研究

该文主要研究二进制传感器网络中加权目标跟踪算法的设计。针对已有算法中权值不能实时反映目标与感测节点之间距离关系的缺点,提出了距离加权和基于预测的距离加权目标跟踪算法。距离权值能够实时反映目标与各个感测节点间的距离关系,因此具有更高的跟踪精度。在距离加权算法中感测节点需要将感测信息和距离信息都传输到融合中心,这会增大感测节点的能量消耗。为了解决这个问题,文中提出一种基于预测的距离加权目标跟踪算法。该算法中感测节点不需要传输距离信息而只传输感测信息到融合中心从而减少了能耗。仿真结果表明,基于预测的距离加权算法比已有算法能够够精确地跟踪目标,在保证跟踪精度的同时减少了通信能耗。     

Determination of falcarinol in carrot (Daucus carota L.) genotypes using liquid chromatography/mass spectrometry

A new analytical method for the determination of falcarinol [(Z)-heptadeca-1,9-diene-4,6-diyn-3-ol] in carrot root samples has been developed and validated. The method consists of accelerated solvent extraction (ASE) of lyophilised carrot root samples with ethyl acetate and LC–MS analysis of the extracts. Falcarinol was determined by extracting the main ion species generated in the ESI positive mode, m/z 268 [M+H–H₂O+MeCN]⁺, from the full MS chromatogram. Quantitation was performed using a falcarinol calibration curve (correlation coefficient 0.9975) as an external standard and pelargonic acid vanillylamide as an internal standard. The method showed good precision with interday and intraday variation of less than 4% and high recovery (average recovery rate 97.9%). LOD (S/N = 3) and LOQ (S/N = 10) were 2.5 and 7 ng, respectively. Using this method, 27 different carrot genotypes grown and harvested under the same conditions were analyzed, and falcarinol contents ranging from 0.70 to 4.06 mg/100 g fresh weight were determined.     

GW4-40.5DW型隔离刀闸改造

为了消除GW4-40.5DW型隔离刀闸频繁发热问题,同时本着安全可靠,降低费用的原则,根据隔离刀闸的工作条件、设计原理制作加工件来固定接地刀闸的静触头,从而保证了GW4-40.5DW型隔离刀闸安全、稳定运行。