探测激光超声信号的Fabry—Perot干涉仪及测试系统的研制

本文自行研制了一台Fabry—Perot干涉仪及其用于探测超声信号的测试系统。利用该系统对非光学表面的铝板和铜板实现了nm级窄脉冲激光超声信号的非接触式检测,其信噪比足以满足进一步信号处理要求。     

用高阶累积量提取高斯噪声中信号的研究

在噪声中提取信号一直是微弱信号检测及数字信号处理领域里研究的重要问题，本文介绍的最如何利用高阶累积量提取高斯噪声中的信号，可以证明了，对于高斯噪声，它的三阶或三阶以上的累积量为零，因此，通过计算高斯噪声的高阶累积量可达到抑制噪声的目的。     

检测质量评价方法的探讨和我所的检测质量抽查工作

本文对检测质量的评价方法进行探讨，给出评价检测质量好坏的判别式，以此为依据，我所开展了检测质量抽查的实践活动。     

“空中B超”——遥感影像用于考古

结合全球卫星定位系统GPS,遥感成像技术能提供大量对考古研究极为有价值的田野影像信息。结合不同年代拍摄的航空照片,考古学家从这些遥感影像中获得大量信息,并得以在近些年来取得很多举世瞩目的成果。本文列举了一系列典型事例,也披露了我国一些古迹的演变情况。     

汽车后制动凸轮的坐标检测

一、概述 我厂生产的汽车后制动凸轮如图1所示,此种带有滚轮的进给凸轮轴,其工作轮廓为阿基米德螺线,基圆直径为φ25mm,滚轮直径为φ45mm,升程为11.5。要求凸轮轴     

数字式带钢跑偏自动控制系统

介绍了用于板带轧机配套使用的跑偏自动控制系统,论述了系统的原理和设计,给出了系统的扩展应用.     

方波校准电压的检测

方波校准电压的检测河南省计量测试研究所白宏文，陈传岭一、概述目前示波器校准仪种类较多，但产生方波校准电压的方法大同小异。方波校准电压是示波器校准仪比较关键的技术指标，同时也是目前比较难于检测的指标。计量检定规程中的检测方法有二：方法１如图１，用于检定...     

On GID-Testable Two-Dimensional Iterative Arrays

A new approach is presented for easily testable two-dimensional iterative arrays.It is an improvement of GI-testability (Group Identical testability)and is referred to as GID-testability (Group Identical and Different testability).In a GID-testable two-dimensional array,the primary x and y outputs are organized into groups and every group has more than one output.This is similar to the GI-testable arrays.However,GID-testability not only ensures that identical test responses can be obtained from every output in the same group when an array is fault free,but also ensures that at least one output has different test responses (from the other outputs in a group)when a cell in the array is faulty.Therefore,all faults can be detected under the assumption of a single faulty cell model.It is proved that an arbitrary two-dimensional iterative array is GID-testable if seven x-states and seven y-states are added to the original flow table of the basic cell of the array.GID-testability simplifies the response verification of built-in-self-testing in a way similar to PI-and GI-testability^[6-9].Therefore,it is suitable for BIST design.