基于B/S模式和J2EE架构的工商网站研究与设计

本文介绍了B/S结构的设计与实现以及J2EE架构的体系结构和优势,并结合实际经验,设计开发了基于B/S模式和J2EE架构的工商网站,降低了办公成本,提高了工作效率。     

基于J2EE的电力市场交易运营系统——发布和申报子系统的设计与开发

电力市场运营系统是为了适应我国电力市场化改革的需要,部署在电力调度(交易)中心的一套自动化系统,本文介绍该系统的信息发布与数据申报子系统的设计开发与运用到的关键技术。     

一种基于拦截器的J2EE容忍入侵框架的研究与设计

本文给出了一种基于拦截器的容忍入侵框架的设计,该框架设计包括容侵服务提供者设计和容忍入侵服务管理者的设计,目的是将服务提供与服务管理分离,实现了容忍入侵服务的可集成性、可扩展性。     

Study on E-commerce system architecture based on MVC model and J2EE platform

The paper discusses the concept and basic theory of MVC design pattern in detail. And J2EE technique system which is often used in the advance enterprise application is also introduced. Based on electronic commerce traditional application architecture, the MVC design pattern and J2EE technique are combined and a new electronic commerce application system architecture is put forward. The architecture improves the maintainability and reliability of system, and capability of repeat use in increased. Therefore the architecture will influence today＇s system technology of E-commerce strongly.     

Models for Image Interpolation Based on the Optical Flow

Optical flow is the 2D motion that needs to be recovered from a video sequence. In this paper we study variational principles for the generation of interpolating sequences between two images. The basic assumption is that there exists an underlying video sequence that solves the optic flow equation and interpolates the two images. The numerical solution of the interpolation problem is reduced to the solution of a system of coupled partial differential equations. Some numerical simulations are presented. Received June 29, 2000; revised November 29, 2000     

L ∞-error estimates of higher order mixed finite element approximations for elliptic optimal control problems

In this paper, we investigate the L ^∞-error estimates of the numerical solutions of linear-quadratic elliptic control problems by using higher order mixed finite element methods. The state and co-state are approximated by the order k Raviart-Thomas mixed finite element spaces and the control variable is approximated by piecewise polynomials of order k (k≥1). Optimal L ^∞-error estimates are derived for both the control and the state approximations. These results are seemed to be new in the literature of the mixed finite element methods for optimal control problems.     

GPU Shape Grammars

GPU Shape Grammars provide a solution for interactive procedural generation, tuning and visualization of massive environment elements for both video games and production rendering. Our technique generates detailed models without explicit geometry storage. To this end we reformulate the grammar expansion for generation of detailed models at the tesselation control and geometry shader stages. Using the geometry generation capabilities of modern graphics hardware, our technique generated massive, highly detailed models. GPU Shape Grammars integrate within a scalable framework by introducing automatic generation of levels of detail at reduced cost. We apply our solution for interactive generation and rendering of scenes containing thousands of buildings and trees.     

煤矸石混合料路面基层施工工艺研究

为探索煤矸石混合料这一新型材料作为路面基层填料的施工工艺,以邢台某矿公路工程为依托,在分析研究煤矸石混合料自身特点的基础上,制定“J3Z4N2法”铺筑试验路段并应用于整条道路,分析研究煤矸石混合料路面基层关键施工工艺和注意事项,通过现场对控制指标的检测,证明“J3Z4N2法”铺筑整条道路各项指标均能达到规范标准。     

基于CAN总线的柴油发动机参数自动监测系统

开发了一种CAN总线和SAE J1939协议的柴油发动机运行参数自动监测系统,设计了微控制器与CAN总线连接电路、上位机通信电路设计和电源电路,实现了发动机参数的实时采集和监控,提高了发动运行的安全性.