Objective:To analyze the pathogenesis, clinical diagnosis, treatment and aeromedical identification of rotator cuff injury in a fighter pilot, and to put forward prevention and treatment suggestions.Methods:The diagnosis, treatment, prognosis and aeromedical identification of bilateral rotator cuff injury in a fighter pilot were retrospectively analyzed, and the relevant literatures were reviewed.Results:After conservative treatment of the right rotator cuff injury in the past, the pilot was qualified for flight and participated in normal flight. After conservative treatment of the left rotator cuff injury, the left joint activity was normal without dysfunction. After pain relief, the pilot was qualified for flight.Conclusions:In order to do a good job in prevention and treatment, flight surgeons should improve the understanding of rotator cuff injury, understand its etiologies, pathogenesis and therapies, be familiar with relevant auxiliary examinations and conservative treatments, and master the necessary physical examinations.

程控交换机是整个通信网络的中枢,因而它的管理维护是至关重要的。程控交换机的软件系统是一个庞大、复杂的系统,交换机的类型不同,软件系统也不一样。本文分了ZXJ10的软件结构,探讨了软件升级的问题。

为了能够使程控交换机进行正常的工作从而来保证通信的服务质量,因此对于程控交换机的硬件结构是十分重要的。本文分析了程控交换机的硬件结构,探讨了程控交换机的硬件结构应注意的问题。

在PCM设备中,各路编码信号,先经时分多路复用,合成的码流再通过信道(或线路)传送到接收端。在接收端先进行信码再生,定时提取及分路,再经数模变换(即PCM解码),还原为PAM抽样保持信号。根据抽样定理,借助低通滤波器便可以从中恢复出模拟话音信号。