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作运用C Builder提供的4种组件,创建了一个能发送和接收从简单的字符串到复杂的件流等不同内容的应用程序,并讨论了这4种组件的相互联系和区别。 相似文献
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本文对我国汽车工业研究开发人员的现状进行了分析,分析了我国汽车工业研究人员的总量及其需求补充量,采用三种方案对我国汽车工业研究开发人员的培养规划进行了研究。研究结果表明,到2010年,我国汽车工业研究开发人员总数将达到12.4万人,密度为5.2%,达到目前先进发达国家汽车 水平。按本文高方案培养规划,到2010年,我国汽车工业研究开发人员的供需满足率可达到96.4%。 相似文献
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High functionality given to steel products results in incremental environment loads at the steelmaking stage. However, at the stage of utilization, high-functional steel products prove more environment friendly than their conventional counterparts in many cases. Therefore, evaluation on contribution of steel products to environmental improvement requires an integrated approach that considers the product over its entire life cycle — life cycle assessment (LCA). This paper discusses the relationship between the improvement of steel products performance and environmental impact from the entire life cycle perspectives. The LCA method to calculate and assess contribution of high-functional steel products during the life cycle to environmental improvement is explained. Two case studies of Baoshan Iron &; Steel Co., Ltd. (Baosteel for short) are given to show that LCA is a scientific and systematic method for eco-materials evaluation or eco-design: ? in a power transformer, using silicon steel B30P110 to replace B30G130 can reduce carbon dioxide emissions in the region of 15.1% over the life cycle of the power transformer; ? tinplate steel of Baosteel for two-piece steel cans experienced six times thickness reduction from 0.280 to 0.225mm, which results in 14.5% emission reduction over the life cycle of two-piece steel cans. It is a systematic and scientific method for evaluating on products environmental performance from life cycle perspective. 相似文献
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研究目的:提出基于线性无关原则概率配点法的随机响应面法,并采用于C#语言的计算程序WHUSRSM.将随机响应面法和边坡稳定分析的Sarma法相结合,能够有效地分析极限状态方程为隐式的边坡稳定可靠度问题.研究结论:本文采用公路边坡工程算例证明了随机响应面法的有效性,并与传统响应面法及蒙特卡罗模拟方法的计算结果进行了比较.结果表明,随机响应面法的计算精度和计算效率均优于传统响应面法,且计算效率远远高于蒙特卡罗模拟方法.基于线性无关原则的概率配点法求解Hermite多项式展开的待定系数时,不仅可以消除系数矩阵的奇异性问题,而且大大地提高了计算效率;潜在滑体的可靠指标随着黏聚力和内摩擦角间负相关性增加而增大,不考虑这种负相关性得出的结果偏于保守. 相似文献
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