商业企业决策支持系统方案设计

决策支持系统作为一种新兴的信息技术,能够为企业提供各种决策信息以及许多商业问题的解决方案,从而减轻了管理者从事低层次信息处理和分析的负担,使得他们专注于最需要决策智慧和经验的工作,因此提高了决策的质量和效率。文中对决策支持系统在商业企业中的运用作了一些探讨。     

在线字典DNS是什么？

DNS全称为Domain Name System．DNS是域名服务器系统。即域名地址。DNS的作用就是将域名地址转换为IP地址。比如：我们上网时输入的www.chiti.com会自动转换成为218.201.41.14.DNS是我们浏览Internet时最常用的服务，也许你从来没有注意到，但当你在浏览器中输入了一个域名后，首先享受到的便是DNS的服务。     

Preparation and Photolunlinescence of Ordered ZnO Nanowire Arrays

Ordered ZnO nanowire arrays embedded in anodic aluminum oxide (AAO) membranes were fabricated by electrochemical deposition of Zn(NO3)2+H3BO3 solution in a boiling bath. Scanning electron microscope (SEM) and transmission electron microscope (TEM) observation results show that the polycrystalline ZnO nanowires with diameters around 100 nm were uniformly assembled into the ordered nanochannels of the AAO. The results of the investigation into photoluminescence (PL) and electronic paramagnetic resonance (EPR) measurements reveal that the interfaces between the ZnO nanowires and the pore walls of the AAO create a lot of oxygen vacancies, which are responsible for the green light emission (peaking around 512 nm) and the huge enhancement of the PL emission.     

Solution of a hollow thick-wall cylinder subject to quadric function pressures and its limit when l→∞

Analytical solution of basic equations in any discipline, especially in engineering science, is important. The solution of a hollow thick-wall cylinder subject to variable pressures, which is in fact a solution to the spatial symmetric problem, has found wide applications[1]. But the pressure is not always distributed uniformly in engineering prac-tice. So it is very significant to get the solution of arbitrarily distributed pressures. Among various functions, the multinomial function is most …     

Influence of stresses on martensitic transformation in ferromagnetic shape memory Ni_(50)Mn_(19)Fe_6Ga_(25) ribbons

~~Influence of stresses on martensitic transformation in ferromagnetic shape memory Ni_(50)Mn_(19)Fe_6Ga_(25) ribbons1. Ullakko, K., Huang, J. K., O'Handley, R. C. et al., Large magnetic-field-induced strains in Ni2MnGa single crystals, Appl. Phys. Lett., 1996, 69(13): 1966-1968. 2. James, R. D., Wuttig, M., Magnetostriciton of martensite, Philos. Mag., 1998, A 77: 1273-1275. 3. Wu, G. H., Yu, C. H., Meng, L. Q. et al., Giant magnetic-field-induced strains in H…     

异军突起XGI Volari和S3 DeltaChrome图形芯片前瞻

我们都知道．台湾地区有2家逻辑芯片大厂．一家是VIA（威盛），另外一家就是SiS(矽统)．长久以来威盛和矽统一直致力于芯片组的研发销售．不过近年来．两家厂商的市场地位受到芯片组市场新生代nVIDIA nForce系列芯片组强有力的挑战．加之威盛和矽统在P4兼容芯片组上受到Intel的牵制,导致威盛．矽统芯片组业务盈收降低。为此两家厂商将眼     

Intel HD Audio深度剖析

凡是对PC声效有一定了解的朋友都知道．要想提升PC声效的水准．最好的办法就是选购一款PCI接口的声卡．因为大多数主机板上集成的声效芯片功能实在太弱。不过．自从nVIDIA涉足芯片组研发业务．推出nForce系列芯片组之后，人们开始改变对整合声效芯片的看法，因为nForce系列芯片组当中的MCP／     

三代同堂DX7、DX8、DX9显卡的游戏效果对比

PC平台上的3D游戏发展到今天，编程使用的API（应用编程接口），也从最初的Glide演化到DirectX 9.0。期间，我们目睹了3dfx的灰飞烟灭，nVIDIA的功成名就和ATi的后发制人，而微软的DirectX也逐渐取代OpenGL，成为多数3D游戏使用的API，DirectX规定的3D技术，也成为图形芯片务必硬件支持的标准。进入2004年3月，放     

Finite Element Meshes Auto-Generation for the Welted Bifurcation

In this paper, firstly, a mathematical model for a specific kind of welted bifurcation is established, the parametric equation for the intersecting curve is resulted in. Secondly, a method for partitioning finite element meshes of the welted bifurcation is put forward, its main idea is that developing the main pipe surface and the branch pipe surface respectively, dividing meshes on each developing plane and obtaining meshes points, then transforming their plane coordinates into space coordinat…