基于数据仓库技术的电力营销分析系统

随着我国电力市场的逐步发展,电力部门营销工作依靠传统的信息管理方式已不能满足电力市场的要求。电网经营企业如何加强经营管理,如何积极有效地开展市场营销分析工作,是一个需要认真研究和探讨的问题。本文在介绍相关研究背景及关键技术的基础上,主要从应用角度引入数据仓库技术,并对电力营销分析系统进行各方面的分析,建立多维数据集。然后使用OLAP前端工具进行分析和展现,对数据进行钻取分析,最终得到决策结果,使得数据仓库真正运用到电力营销中去,帮助决策者做出正确的决策。     

基于数据仓库及OLAP的鞋类销售系统设计与实现

传统鞋类销售系统数据收集不全面,准确性不高,因而导致决策不科学,并产生资源浪费等问题.本文通过对鞋类销售系统数据仓库的设计,利用联机分析处理（OLAP）技术,探讨了基于数据仓库和联机分析处理技术的鞋类销售分析设计、数据迁移、销售数据分析等问题.实现了鞋类销售系统中的数据多维分析,具有一定的应用价值.     

数据挖掘技术及应用

随着信息技术和数据库技术的快速发展和普及应用,信息化建设取得了长足的发展。信息收集能力得到提高,数据信息量快速增长,然而人们对这种大规模数据的分析、利用、决策能力却比较弱;仅仅依靠传统的数据查询和统计已经不能适应现代社会市场竞争的需要。而数据挖掘技术的出现满足了人们的需求,通过将海量的数据信息转化为有用的数据仓库,为各行各业的发展提供决策性的支持。     

新闻月览

移动通信数据仓库联合实验室在京成立日前,中国移动通信联手北京大学和亚信公司,成立了“移动通信数据仓库联合实验室”,以进一步推动数据仓库技术的研究和应用。移动通信数据仓库是一个基于海量的移动通信业务数据,为移动通信运营商决策提供支持和分析预测的数据仓库系统。该系统可以根据移动通信相关数据和专家知识,分析移动通信业务的现状,预测市场发展趋势。移动通信数据仓库的建设对移动通信运营企业精细化管理有着重要意义,使量化管理成为可能,同时使企业实现从普遍营销到精细化营销的转变,为客户提高更高水平的服务和业务。中国移动…     

利用数据库和WEB技术实现电信企业信息共享

利用数据库技术实现电信企业内部信息共享目前，电信企业的各个部门都收集有大量的客户信息，如何充分挖掘它们的价值，就需要各个部门紧密合作与内部系统间实现信息共享。原有的数据库系统存储了大量的用户数据，但主要是作为各个部门报表查询工具使用，对这些数据的利用率不高，不能充分挖掘这些数据的潜在价值，造成大量信息资源的浪费。随着竞争加剧，企业决策者需要获得更有价值的用户分析数据来指导决策，为此需要引进数据仓库技术，建立数据仓库系统, 实现各个部门的信息共享，充分开发大量的数据资源。数据库系统的海量数据存储功能…     

经营分析系统的数据预处理技术

由于电信企业数据规模的激增和业务种类的复杂,传统的数据库技术已不能满足对海量数据的处理需求,而数据仓库技术及其数据分析技术的出现,为企业提供了高效的数据处理能力和良好的数据理解工具,并对科学的决策分析提供了更好的支持,因而在经营分析系统中应用数据仓库技术成为了必然的趋势。     

浅析数据挖掘在电力调度自动化系统中的应用

电力调度自动化系统是在线为调度机构生产运行工作者提供与电力系统相关的运行信息、分析决策以及控制的综合性系统。使之与数据挖掘技术完美的相结合,可以起到对历史数据或者实时数据有效的挖掘作用,并通过对其利用,进一步促进电力调度自动化系统向着智能化的方向发展。本文就数据挖掘技术在电力调度自动化系统中的实际应用,构建了一个较为符合电网调度自动化系统的数据仓库,以期为相关调度机构提供可借鉴参考。     

电网企业数据中心业务模型的研究

近年来,电力行业相继建立了人力资源、电力营销、财务（资金）管理等诸多应用系统,为提高企业经营管理信息化水平提供了有力的技术支撑,但由于受诸多主观和客观条件限制,各应用系统的信息资源不能充分共享,形成信息孤岛和烟囱。与此同时,大量数据沉积在操作层,不能将其进行综合分析并转换为管理层面所需的企业级决策分析支持信息。在现有的应用系统基础之上,开辟各应用系统间的数据通道,建立一个跨部门、跨平台、踌应用的信息集中、共享平台,将各应用系统的业务数据按主题建成规范统一、高度共享的数据仓库,对现在的、历史的、分散的业务数据进行集中和整合,并采取先进的信息分析和统计方法,对这些数据进行多层次、多维度、多种方式的分析和挖掘,从而促进管理决策水平迈上新台阶。     

基于数据仓库技术的应用研究

作为近年来发展迅速的一种新兴技术,数据仓库能把收集来的数据转变成有意义的可用在分析和报表等应用程序的信息。目前数据仓库技术已经在社会各个行业中成功应用,为决策支持提供服务。本文以一个建立在医药销售领域的数据仓库实际应用为例,阐述了数据仓库技术的原理、数据仓库工具及其关键技术以及未来的发展方向。     

建立电力营销技术支持系统的必要性

电力营销技术支持系统是以计算机、自动控制和现代通信技术为基础的,能够为电力营销作业、管理、决策提供高效准确的数据采集、传输、加工处理和决策支持的计算机网络和自动化系统。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.