基于ANSYS的成型卡盘优化设计

成型卡盘是轮胎成型机中的关键零件,直接影响轮胎的成型。本文简要介绍了ANSYS优化设计的原理和过程,并对成型机的内卡盘进行了参数化建模和优化分析。     

嵌入式设备上Mobile SVG显示的反走样算法研究

以嵌入式设备上Mobile SVG表示模型为基础.分析了反走样技术在低端设备上实现的具体问题.利用后滤波的原理.对多邻接点时新边界点的选择和轮廓端点的对称合成等同题进行了分析.采用构造拟合曲线查找表进行曲线拟合的方法实现反走样.由于映射关系独立于具体图形绘制而事先已经建立.因而计算量不大,对于低端设备图形应用非常适合.实验证明该方法用于Mobile SVG在嵌入式设备上显示时反走样有很好的效果.     

市政道路设施养护主要病害原因分析与处理方案探讨

该文介绍市政道路设施的主要病害,然后针对四大公用管线二次沟修、窨井盖、白改黑、小区出入口、施工缝等方面,发生裂缝、坑塘、凹陷等病害的原因进行分析,并提出针对性处理方案,以期达到预防市政道路设施病害的进一步发生,有效地提高市政道路设施养护寿命,节省养护经费。     

一种新传真加密方案研究与实现

传真通信作为当今重要的通信方式之一,其安全性不容忽视。为保证报文信息传输的安全,需采用加密技术对传真报文进行加密处理。文章比较分析了现有的传真加密技术,提出一种新的二线式加密的实现方式及涉及到的技术难点,证实了方案的可行性。     

装船机俯仰铰点的改造

黄骅港1号装船机（SL1）在俯仰时,发出“咔咔”的声响,随着时间的推移而加剧,并导致臂架振动,影响正常生产和安全SL1悬臂通过两个铰点与大机主体相连,俯仰动作通过铡丝绳卷绕系统来实现。     

强风区大跨度连续梁满堂支架施工技术

满堂支架是现浇连续梁施工中的临时支撑结构,支架的强度、刚度和稳定性直接影响到施工安全和质量。兰新铁路第二双线(新疆段)也台塔格二号大桥连续梁采用满堂支架施工,通过对支架的承载力检算、抗风检算,确定了科学可行的施工方案,在达坂城风区顺利完成连续梁施工。     

An ERP approach for container terminal operating systems

The major characteristics of ERP (Enterprise Resource Planning) are an enterprise-wide system that covers all the business functions and information resources, integrated database, built-in best industry practice, packaged software and open architecture. ERP enables reduction of system development time, flexibility, standardization of workflow and effective business planning capability. ERP is mainly for the manufacturing industry. However, the principles of ERP can also be applied to container terminal operating systems. This paper presents an ERP system approach for a container terminal. It has clustered the workflow of a container terminal and analysed the business process to generate the best workflows. The integrated database is designed to eliminate redundancy and keep integration. The core of ERP for container terminal is the planning facility such as berth planning and yard planning. The planning capability is very tightly coupled with data flow from client entities such as shipping companies. The ERP can handle the existing problems of container terminal operation that are mainly caused by lack of integration of a whole information resource in a container terminal, ad-hoc and poor planning capability, disconnected and incorrect data from client companies. The ERP approach can not only resolve the problems of container terminals but also promote adoption of information systems for container terminals in the world that have not yet implemented terminal operating systems.     

半潜平台动力定位系统模型预测控制器设计(英文)

This paper researches how to apply the advanced control technology of model predictive control(MPC) to the design of the dynamic positioning system(DPS) of a semi-submersible platform.First,a linear low-frequency motion model with three degrees of freedom was established in the context of a semi-submersible platform.Second,a model predictive controller was designed based on a model which took the constraints of the system into account.Third,simulation was carried out to demonstrate the feasibility of the controller.The results show that the model predictive controller has good performance and good at dealing with the constraints of the system.     

海洋观测平台在波浪中运动响应的数值模拟(英文)

Offshore observation platforms are required to have great ability to resist waves when they are operating at sea. Investigation on the motion characteristics of the platforms in the sea can provide significant reference values during the platform design procedure. In this paper, a series of numerical simulation on the interaction of a triple-hulled offshore observation platform with different incident waves is carried out. All of the simulations are implemented utilizing our own solver naoe-FOAM-SJTU, which is based and developed on the open source tools of OpenFOAM. Duration curves of motion characteristics and loads acting on the platform are obtained, and a comparison between the results of the amplitude in different incident waves is presented. The results show that the solver is competent in the simulation of motion response of platforms in waves.     

船用轴带发电机的并网控制

本文对轴带发电机和柴油发电机的并网控制进行了分析。首先,介绍了轴带发电机和柴油发电机的原理和功率调节方式,然后对轴带发电机采用变频器作为稳压稳频单元的使用和变频器输出有功功率和无功功率的解耦控制。