木垒地震台遥测数字地震仪观测系统及故障分析

对木垒遥测数字地震台遥测数字地震仪观测系统的一次典型故障排除维修过程进行了分析总结。在基本理论知识指导下,使用软件、元器件、计算机做为检查故障的工具,以及采用替换法等,对处理复合型系统故障可以取得迅速判定故障、迅速恢复观测系统的良好效果。     

Improvements of corner frequency and scaling factor for stochastic finite-fault modeling

In this paper, three existing source spectral models for stochastic finite-fault modeling of ground motion were reviewed. These three models were used to calculate the far-field received energy at a site from a vertical fault and the mean spectral ratio over 15 stations of the Northridge earthquake, and then compared. From the comparison, a necessary measure was observed to maintain the far-field received energy independent of subfault size and avoid overestimation of the long-period spectral level. Two improvements were made to one of the three models (i.e., the model based on dynamic corner frequency) as follows: (i) a new method to compute the subfault corner frequency was proposed, where the subfault corner frequency is determined based on a basic value calculated from the total seismic moment of the entire fault and an increment depending on the seismic moment assigned to the subfault; and (ii) the difference of the radiation energy from each subfault was considered into the scaling factor. The improved model was also compared with the unimproved model through the far-field received energy and the mean spectral ratio. The comparison proves that the improved model allows the received energy to be more independent of subfault size than the unimproved model, and decreases the overestimation degree of the long-period spectral amplitude.     

Ⅱ型综合遥测气象仪工作原理及典型故障检修

本文对Ⅱ型综合遥测气象仪的组成、作用、工作原理进行了分析、论述,着重通过一起典型故障的分析与排除,揭示出对Ⅱ型综合遥测气象仪的维护要点。     

计算机的常见故障与排除

计算机所发生的故障有两大类型：一类为硬件故障;另一类是软件故障与工作软件故障。下面就2大类型故障发生时的表现与基本排除方法加以论述。     

江苏省数字强震动台网运行与维护

介绍江苏省数字强震动台网布局、强震动仪器观测环境及技术系统组成,并阐述强震动台网运行以及运行设备存在的常见故障和解决措施。江苏省数字强震动台网布局合理、性能稳定、动态范围大,地震记录信息完整可靠,丰富并充实了江苏省强震动数据库,为工程结构的抗震设计及地震工程学研究提供了宝贵的基础数据。     

淮安地震台数字测震系统故障与应对措施

以淮安地震台数字测震系统设备为例,作者根据多年台站观测工作经验,提出更加适用的测震系统观测方案,结合观测中遇到的各类故障,总结归类出故障的现象、排查方法、应对措施和注意事项。     

浅谈气象电子设备的检修方法

检修电子设备时,不要急于通电检查。首先应向使用者了解电子设备故障前后的使用情况(故障发生在开机时,还是在工作中突然或逐渐发生的,有无冒烟、焦昧、闪光、发热;故障前是否动过开关、旋钮、按键、插件等）及气候等环境情况。     

XDR-21雷达故障的分析与检修

根据XDR-21雷达的故障现象,分析产生故障的原因,缩小排查故障的范围,应用检修故障的基本方法,达到尽快排除故障的目的.     

701B型雷达故障检修三例

在701B型雷达中，传输线分为高频和低频两种。高频传输线主要传输高频能量（高频信号）．低频传输线的作用是输送交百流电压。例1故障现象：天线对准目标后，测角显示器中4条线不等高。在显示器中，有时表现为“”，有时为“”有时又正常。探空讯号正常。分析及检修：上述现象说明，雷达的高频通路有问题。测角显示器中，4条亮线不能对齐，高频信号经天线到接收机，经过放大后，加到测角显示器垂直偶相放大（G7上的幅度不等，即天线阵4组小组馈线接收到的信号，经过换相器．高频旋转关节，收发开关，高频放大、接收机，最后到达测角显示器…     

县级业务平台供电系统安全

从近几年的业务运行看，雷击、电路故障等问题导致业务平台设备多次遭受毁坏，造成了资料缺失以及很大的经济损失。可见及时排除隐患，保障设备安全尤为重要。