发掘论坛人际关系圈模型

探讨论坛人际关系圈的发掘。从帖子关联关系出发,运用数据挖掘中的灰色关联分析法对论坛人际关系圈做综合评价。建立旨在用灰色关联的数据挖掘方法建立满足最小支持度阈值和最小信任度阈值的关联规则的模型。为论坛的发展、经营提供数据支持。     

基于GM(1,1)模型的东辛采油厂产量预测研究

本文介绍了GM(1,1)模型的建模过程,考虑油田产量数据较少的现状,将其视为灰色系统,并利用灰色系统GM(1,1)模型对油田石油产量进行了预测。经实证,模型的精度符合要求,预测结果可以为采油厂提供决策依据。     

数据挖掘在医疗器械人因事件分析中的应用

将数据挖掘技术应用于医疗器械人因事件的灰色关联分析中,通过分析现有医疗器械不良事件汇报系统中的数据,获取不同类型人误对人因事件的关联影响.提出了应用数据挖掘的具体分析和操作流程,同时以医用泵的人因事件分析为实例,定量分析了医用泵人因事件的原因因素和人误,以及人因事件后果和人误之间的关联程度,以便对医疗器械人因事件的整个发展过程进行定量化的分析.     

统计信息的数据挖掘与可视化分析系统

将数据挖掘、Web报表可视化技术、联机分析处理技术、内容管理技术集成,构造一个应用于统计部门的统计信息的数据挖掘与可视化分析系统(SDVS)。并技术实现了各模块的主要功能,验证了SDVS的可行性。     

基于组合权重的灰色关联理想解法及其应用

引入灰色系统理论,对传统理想解法(TOPSIS)进行了拓展,提出了一种基于组合权重的灰色关联理想解法(GC-TOPSIS).利用AHP和熵值法对决策指标进行组合赋权,依据灰色关联分析理论,以灰色关联度为决策单元构造GC-TOPSIS模型,最后通过一个供应商选择的实例验证了方法的有效性和可行性.     

基于数据挖掘技术的入侵检测系统

详细论述了在入侵检测系统中数据挖掘技术的应用，对现有的应用于入侵检测的数据挖掘技术如关联规则、聚类分析、特征分类等进行了分析和综合。结合元挖掘等新概念，本文给出了一个应用数据挖掘技术的入侵检测系统IDSDM框架。该框架具有良好的智能性和自适应性。     

数据挖掘技术在校园卡消费系统中的研究

本文基于OLAP技术和数据挖掘技术,构建了校园卡消费系统数据挖掘模型,提出了一种WEB下基于OLAP和数据挖掘技术的校园卡消费系统挖掘算法,并分析了数据挖掘在校园卡消费系统中实现的过程。     

测量仪器校准间隔的动态灰色线性回归预测

根据测量仪器的实际状态进行校准间隔的预测,可有效地避免不足校准和过剩校准。该文分析了历史校准数据的特征,对于既含有线性因素又含有指数因素的历史校准数据序列,建立动态灰色线性回归预测模型,预测测量仪器的校准间隔。动态灰色线性回归模型有机地将灰色GM(1,1)模型和线性模型组合起来,通过新老数据的新陈代谢,更加真实地反映系统的特征。通过实验对预测模型进行验证,结果表明:动态灰色线性回归模型的拟合与预测精度高于单纯的灰色GM(1,1)模型及新陈代谢GM(1,1)模型。     

基于云计算平台的风电场SCADA系统的设计与应用

针对目前风电场积累的海量多源异构的大数据,借助云计算平台架构灵活多变、数据并行处理的优势,设计了基于云计算平台的风电场数据采集与监控(SCADA)系统。在该系统的云计算平台上采用智能化数据挖掘算法,完成了风机数据的远程采集、智能分析、故障预判。最后选取反映风电场性能的功率和转子转速数据,以自适应权重(AFW)的K-means算法和最小二乘支持向量机两种典型的数据挖掘算法为例,对数据进行了聚类分析和回归分析,验证了系统的可行性。     

基于灰色关键链的项目进度管理方法及应用

针对项目或者任务完成时间具有外延确定而内涵不确定的特点,应用灰色系统思想提出了基于灰色关键链的项目进度管理方法.设计的灰色关键链方法通过改进关键链中缓冲时间的取法,以设置合理的输送缓冲时间(Feeding Buffer)及项目缓冲时间(Project Buffer).最后,通过实例给出了该方法的应用步骤,并将计划评审技术、关键链与灰色关键链进行了比较.     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

Refrigerators Enter a New Era of Health Preservation Frestech initiates the establishment of China's first standard for household sterilization refrigerators

On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

A study of centrifugal cast high boron high speed steel

In the present study a high‐boron high speed steel (HSS) roll material was designed. Many expensive alloy elements have been substituted by cheap boron alloy, and high‐boron high speed steel roll has been manufactured by centrifugal casting method. The microstructures, mechanical properties and wear resistance of centrifugal casting high‐boron high speed steel roll have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD) analysis, hardness test, impact test and wear test. The results indicated that the solidification microstructures of high‐boron high speed steel roll consisted of M₂(B,C), (W,Mo)₂(B,C), M₃(B,C), M₂₃(B,C)₆ type borocarbides and martensite, a small amount of retained austenite. Borocarbides were continuously distributed over the grain boundary. After quenching from 1050 °C, local broken network appeared in partial borocarbides, and fine secondary borocarbide precipitated from the matrix. After tempering from 525 °C, the amount of precipitated borocarbide increased significantly. After heat treatment, the hardness of high‐boron high speed steel roll excelled 60 HRC, and its impact toughness excelled 8.0 J/cm². The single groove steel rolling amount of high‐boron high speed steel rolls increases by 500% than that of bainite cast iron roll, when the rolls are used in K₁ mill housing of bar mill.     

Thixotropy of Systems with Shear Thinning and Plastic Flow Behavior

The definition of the thixotropy is a decrease in viscosity with time in shear and a subsequent recovery of viscosity after the shear deformation is removed.We ...     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.