论文部分内容阅读
本文不但给出了双曲抛物面、正螺面、悬链面及旋转曲面的渐近曲线,而且给出了含有隐函数的曲面的渐近曲线应满足的方程.
曲面的渐近曲线探讨
【摘 要】
：
本文不但给出了双曲抛物面、正螺面、悬链面及旋转曲面的渐近曲线,而且给出了含有隐函数的曲面的渐近曲线应满足的方程.
【机 构】
：
湖北十堰职业技术学院
【出 处】
：
河北工程技术职业学院学报
【发表日期】
：
2003年3期
其他文献
The effects of boron on electrical conductivity of aluminum and the action mechanism have been investigated. The results indicate that, by combining with the tr
Vast amounts of tailings are produced daily in bitumen extraction from the Athabasca oil sands. The coarse sand from the tailings stream is used to build dykes
就业形势日益严峻,失业群体不断涌现,已成为当前我国和谐社会发展的一个重要障碍。只有强化政府责任,优化就业结构,提升就业、再就业能力,构建公共就业服务体系,才能为更好地
Nanoscale α(Al) phase with a size of 15 nm was precipitated from Al80Ni6Y8Co4Cu2 amorphous ribbons after annealing. The microhardness increases with increasi
期刊
Cored wires and high velocity arc spraying (HVAS) technique were applied to produce high Al content Zn-Al alloy coatings on low carbon steel substrates. The ele
邓小平创立了建设有中国特色社会主义理论，为非公有制经济在我国的生存赢得了合法的地位，并使其不断发展和完善，成为促进我国社会生产力发展的重要力量。
劳动力资源历来都是社会生产中不容忽视的要素，但现代企业管理却常常困惑于对它的恰当使用。在知识经济的强劲敦促下，我们有必要重新审视和重视劳动力资源及其劳动的特殊性。籍
A general mathematical model and boundary condition applicable to momentum and heat transfer in the semisolid continuous casting(SCC) process was established. U
期刊
The bonding of steel plate to Al-7graphite slurry was conducted using casting rolling technique. The influence of diffusion time on interfacial mechanical prope
Effects of various technological conditions such as ρ (Cl-),ρ (Fe)T,pH value and temperature on the cell voltage,lead leaching rate and the cathodic current e