基于Socket的VC++与Flash通信

VC++能够进行大量的数据处理,但是在编程中,对于程序界面的设计则存在编码复杂和代码量大的问题。Flash是一种交互式矢量多媒体技术,将其嵌套在网页或应用程序等外部容器中,可以获得一个友好美观实用的用户界面。采用Socket通信技术,实现了VC++和Flash之间的交互,使处于不同机器上的2个进程间无障碍的通信,从而形成了VC++和Flash的优势互补。     

基于VC＋＋的船舶电力推进系统故障仿真软件设计

本文根据船舶电力推进系统的运行原理,在VisualC＋＋6．0中建立了船舶电力推进系统典型设备变压器、变频器、电动机的模型,设计了船舶电力推进系统故障仿真软件。该软件可对船舶电力推进系统进行运行仿真和故障仿真,不仅可以作为船舶电力推进系统设计和研究的参考,也可以为船舶电力推进系统故障诊断技术的研究提供输入。     

TMS320VC5509A的I^2C总线应用研究

I2C总线提供了IC间通信和简化了电路设计,已经成为世界性的工业标准,得到了广泛的应用。TMS320VC5509A提供I2C总线,研究了TMS320VC5509A的I2C的软硬件设计,指出了软件关键设计,给出了部分源码。     

两峰之间“波谷”——剖析2011年中国车市

中国车市2011年1—5月出现大幅度回落,有专家误判＂车市进入本次波动收缩期＂,因此对完成＂十二五＂汽车规划信心动荡。文章为解决上述＂认识误区＂,采用＂车市波动分析法＂这一创新成果,分析研究了有关数据和波动图波形走势,判定当前车市处于两峰之间的＂波谷＂,处于本次波动＂扩张后期＂,还没有进入＂收缩期＂。2011年车市处于中下等市场,2011年下半年将有所回升,年增长率接近10%（与GDP基本同步或稍高）。对＂十二五＂期间车市发展持审慎乐观态度。     

超声波-铁氧体法处理含铬废水的实验研究

本实验使用超声波-铁氧体法对含铬废水进行处理,通过考察硫酸亚铁用量、pH值、H2O2用量、超声波的辐射时间和辐射功率对含铬废水铬去除率以及铁氧体磁性的影响,设计超声波-铁氧体法处理含铬废水的最佳操作条件.结果表明,随着硫酸亚铁用量的增加,Cr6 的去除率增大,最佳pH为9.0,当Fe2 :Cr6 =6∶1(mol∶mol)、超声波辐射时间和辐射功率分别是30 min和50 W/cm2时,去除率高达到99.9%以上,H2O2用量为1.0~2.0 mL,铁氧体的磁性最强.     

制冷剂/压缩机油与PA6的相容性研究

采用红外光谱分析和热重分析研究了不同规格PA6(聚酰胺6或尼龙6)的区别,不同规格PA6的红外谱图有细微区别,PA6在350℃之前的热失重量不同,可见其增塑剂等小分子的含量不同,这不但影响PA6的耐热老化性能,还会明显影响PA6的挤出工艺和使用性能.通过PA6在制冷剂、压缩机油、制冷剂/压缩机油等介质中的热老化测试和测...     

复杂城市场地下大跨度桥梁总体设计关键技术研究

以常德沅江六桥总体设计为例，分析了基于复杂城市场地下大跨度桥梁设计特点及需考虑的各方面因素，阐述沅江六桥方案的设计思路。综合考虑规划路网、沿线高压电走廊、沅江水文条件、地震断裂带等因素，对大桥的规划桥位进行优化调整，提出推荐桥位方案。根据通航要求和规划码头等条件，确定推荐方案的桥梁跨径和桥型。简要介绍桥梁结构设计，并验证主要结构的科学合理性。     

Mechanical model and characteristics of deep-water drilling riser-wellhead system under internal solitary waves

Internal solitary waves with a huge amount of energy easily trigger the large dynamic responses of riser-wellhead system and threaten its structural safety. However, previous studies have only focused on the dynamic response of the riser under internal solitary waves. The riser may experience excessive traction from the platform, especially from the mooring platform, in response to the arrival of internal solitary waves. The bottom of the riser connects to the wellhead system, which in turn exerts a reaction force on the riser. To address this problem, a coupled dynamic model of deep-water drilling mooring platform-riser-wellhead system under internal solitary waves is developed in this paper. A dynamic response analysis method based on the fourth-order Runge-Kutta method and finite element method is also proposed for the mooring platform-riser-wellhead system. A dynamical solver for the coupled system is then developed using MATLAB. The dynamic response characteristics of the riser-wellhead system under internal solitary waves are calculated. Results show that the displacement and bending moment of the system initially increases and then decreases along with the propagation of internal solitary waves, and finally reach equilibrium position. The displacement and bending moment reach their peak before the trough of internal solitary waves passes through the riser-wellhead system. The dynamic responses of the riser-wellhead system under the influence of internal solitary wave loads are much larger than those without the effect of internal solitary wave loads. The riser system experiences shearing loads at the interface of internal solitary waves, which trigger a step-like bending moment variation. The bending moment of the conductor under the mudline is greatly increased by the internal solitary waves.