一种新的数据持久层设计方法与实现

针对目前数据库模型改动将导致业务层和数据库层的大量数据修改的不足这一问题,提出建立新的框架即双重数据持久层框架的设计方法,该方法联合运用iBATIS数据持久层框架和数据字典技术来实现.当数据库模型需要变更时,可较方便地通过操作数据字典,来实现对数据持久层和数据库模型的同步维护,较大程度提高了工作效率,可移植性增强.     

面向电信客服数字化改造的多源数据采集和大数据可视化技术研究与运用

提出了一种多源数据采集的工程实践方法，通过机器人流程自动化（RPA）等技术打破企业数据烟囱隔离，使得离散在企业各个数字孤岛的数据能够实时同步到统一的数据库中，并通过大数据可视化技术实现各类生产经营过程的实时看板，提升企业运营生产管理效率。     

物料编码在信息系统中统一技术的研究与实现

物料数据是企业最基础、最重要的数据,贯穿于企业生产经营活动的各个方面。物料编码作为物料数据在企业中的唯一标识,需要在各应用系统之间进行同步和统一,是企业信息化的基本要求。针对这一要求,提出使用异构数据库同步技术和WebService技术来实现物料编码在不同应用系统间的同步和统一方案,并结合现有信息系统得到实现,为企业实现物料编码统一提供了有益的借鉴和指导。     

ERP与MES数据交互中间件的设计

为了解决企业ERP与MES之间的数据交互,减少作业时间和人为误差,提高录入的效率和数据准确性,最大限度的保持数据的同步,提出了一种基于Web Service技术来实现静态数据的时时更新和动态数据的同步更新的中间件设计方案,并完成中间件的设计。该中间件采用VisualStudio2010进行编程,能够实现ERP与MES之间的数据交互。实际应用表明,该系统具有操作简便、调用灵活的特点,达到了设计要求。     

数据同步技术在移动互联网中的应用

１ 引言 数据同步技术是指当一个软件系统的数据分布地保存在不同的数据源中,这些数据源位于有线或者无线的网络之中不同的节点上,为了维持这些数据源的数据保持彼此同步所采用的数据交换技术。 数据同步技术主要有两方面的应用例子。 （１）不同设备之间的应用数据的同步：因为一个软件系统可能要跨越多个设备,因此,在不同设备之间同步同一个应用系统的数据,成为一种对数据同步技术需求。 （２）巨型数据库群组之间的数据同步：在因特网上面的巨型数据库群组,由于单点的处理能力有限,需要采用群组的方式来处理数据。但是群组之间的…     

基于用户数据字典的通用动态查询组件的研究与实现

为了提高管理信息系统中查询的通用性，解决系统应用程序对具体数据库结构及开发语言依赖性过大的问题．本文介绍了一种基于用户数据字典的通用动态查询的设计与实现方法，利用组件技术封装了数据库接口、查询功能和用户数据字典维护功能，使查询更加灵活、易操作，并可以在不同数据库和开发语言环境下应用，提高了软件的复用性及系统开发的效率，文末给出了具体的应用。     

移动中间号系统异地双活架构设计与实现

随着中间号系统业务扩张，数据量的增长对系统的数据库存储和可靠性提出了更高的要求。为了解决这一问题，中间号提出了一种基于Canal实现的数据同步架构方案，以实现快速访问数据和高可靠性的存储。该存储架构方案通过Canal实现有条件同步存储数据，即只同步业务需要的关键数据，避免了数据冗余和无效存储，提高了存储效率和数据的安全性，最后对存储架构进行了系统测试和评估。     

安徽省综合观测资料基础数据库系统设计与实现

为了实现安徽省国家级、区域级自动气象站,自动土壤水分观测站等各类综合观测资料的数据采集存储、加工处理、报文生成等功能,利用最新数据库镜像、数据同步技术,设计、建成了一套高效、稳定、安全、易用的省级综合观测资料基础数据库系统。该数据库系统提供API接口和Web Service接口两种数据接口访问模式,可满足现有气象业务、科研对实时综合观测数据的服务需求。     

灾备端数据库读写分离技术研究

Golden Gate和Active DataGuard都是Oracle公司的产品,Golden Gate能够实现与生产数据库亚秒级的数据同步,同时可实现两端数据的同时写入;Active DataGuard技术不仅仅能够实现数据的实时同步,还能够提供实时的数据查询和报表业务等。因此,将Golden Gate和Active DataGuard技术结合不仅能够实现生产数据的容灾,还能够实现灾备端数据库读写分离,提高系统整体的业务处理能力,同时充分利用备份端的计算能力,减少投入成本。     

Sybase数据库自动备份与自动异地存放的实现方法

1问题的提出Sybase数据库系统已被广泛应用于各通信企业的信息系统中,其先进的复制服务器技术是实现数据库实时异地备份的好途径。但是,该数据库实时异地备份技术实现起来难度较大,需要的投资也较大,所以目前用得比较少。通常情况下,数据库系统管理员每天要进行手工dump操作,但几乎不进行异地备份,这不符合数据异地容灾的原则,存在着数据安全隐患。笔者在平时数据库系统的维护管理中,摸索出一种对Sybase数据库进行自动备份、对备份出来的文件自动进行异地存放以及在异地自动对数据库表进行bcp的方法。该方法简单易行、投资小,在很大程度上…     

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.     

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.     

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.     

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.     

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.     

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.     

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.     

A method for calculating the center position of collimated light

It is a key problem to accurately calculate beam spots＇ center of measuring the warp by using a collimated laser. A new method, named double geometrical center method （DGCM）, is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device （CCD） is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What＇s more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.     

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.