【何岭松】.pdf

ADissertationSubmitted toHuazhong UniversityofScienceandTechnologyfortheDegree ofDoctorofPhilosophy Researchon Time-FrequencySignal Representation and RelatedTechnologyforMechanicalDeviceDiagnosis Ph.D.Candidate:HeLingsong Advisor Prof.Yang Shuzi Ass.Advisor Prof.

ABSTRACT Thispaper studies the significance of time-frequencysignalrepresenta tionsinthefieldofmechanicaldevicediagnosis,anddiscussesthefundamen-tal methods,the numericalimplementations and theengineeringapplications ofthreemaintime-frequencysignalanalysistheories,theshort-timeFourier transform,the

2.采用图形覆盖技术,设计了一个多级交互式菜单结构,解决了菜单级数和系统内存之间的矛盾.3.研究了DOS/BIOS功能开发、中断,提高了对系统资源的利用率,减少了对其它软件的依赖.4.研究了汉化技术、装饰技术、图形输出技术和软件保护技术,提高了软件的设计质量和商业化程度.5.设计了A/D板、数字化仪、鼠标器、打印机和视屏卡的控制程序,解决了常用外设的控制问题.在开展上述两方面工作的同时,笔者结合教研室的工作,完成了下列信号分析程序:1.多通道信号采集程序:采样通道数可在1一16间选择.2.