径向跳动测量中测量基准对实际基准的误差修正法

本文论述了在径向跳动测量过程中 ,修正测量基准对实际基准不重合误差的原理和方法 ,给出了应用该方法的软件流程图 ,并对这种方法进行了实验分析。

飞剪速度基准的研究

给出了飞剪在启动加速阶段、剪切的匀速运动阶段以及剪切完后返回的定位阶段,速度的原基准与飞剪的速度实际基准之间的关系·速度的原基准与速度实际基准之间的关系决定了飞剪的剪切精度、定位的准确度以及轧件的端面的平滑等技术指标·这种关系由计算机运算与输出,并在钢厂得以成功应用·实践证明,由这种算法得出的飞剪速度实际基准容易由计算机实现且是准确的·

直线垂直度误差的一种评定方法

本文通过最小二乘法建立基准直线模型,探讨一种直线垂直度误差的测量评定方法。

A Proposed Benchmark to Evaluate Investment in Maritime Hub Ports

This paper concerns in studying the evaluation of investment in sea hub ports, in terms of investment＇s real cost, types of investments, their aims, the direct and indirect effects of these investments, and the various methods used to assess the expected returns from such projects, in order to propose a criterion for investment in sea hub ports. Through divining methodological framework into three sections： the first one covers the topic of investment in general, its types, purposes, and its determinants; While the second section covers the different definitions of ports and types of investment projects in them, their nature, purposes and effects; Section three concentrates on the appropriateness of the methods used to evaluate sea port project, concluding a benchmark formula to be used in evaluating maritime hub port investment projects.