一种直线滚动导轨综合测试仪的研制

本文介绍一种新型直线导轨－滚动直线导轨的综合测试系统，该系统应用激光，光纤，测微传感器，激光准直，应变式测力传感器，通过微机控制检测，处理数据，成功地解决了滚动直线导轨的综合测试问题。     

A Guide to Digital Television

The construction of a social credit system is a social systematic pro-ject.China’s social credit system includes four aspects:social credit sys-tem,credit management and service system,credit practices,supervision     

A Guide to Food Labeling

In this book,the fundamentals of writing,editing and getting published areintroduced,explained and analyzed in question and answer form,using non-technical language.The goal of the     

A Manager's Guide to Operations Research

A continuous r.v. can only hypothetically assume any value on a continuum. When only an approximating discrete r.v. (“discretization”) is observable, estimation procedures employing the hypothetical continuous variate are sometimes biased. This paper studies the relative expectation and variance biases for several common distributions from a point of view somewhat different from that taken by the well-known Sheppard's Corrections. For each distribution a table is provided to enable the statistician to determine whether a serious bias problem exists. It is noted that while these biases are often of little consequence to the applied statistician, estimators that are a function of several discretized r.v.'s may be seriously biased.