Based on the working principle of the wideband tiltmeter,this article categorizes typical faults into control functional faults,signal conditioning faults,and network faults.It analyzes and summarizes the faults and maintenance situations of the wide-band tiltmeter at Linfen Station from June 3 to December 4,2022,deriving a practical set of troubleshooting and maintenance experi-ences.This holds certain reference significance for ensuring the stability of instrument operation and improving the quality of data observation.
Accurate population distribution information is crucial for rapid post-disaster assessment and emergency rescue decision-making.The precision of population distribution data based on administrative divisions no longer meets practical needs.In this stud-y,we integrate remote sensing building data,residential data,natural environmental factors,and statistical population data.Focu-sing on Shanxi Province as the target research area,we establish a mathematical model for kilometer grid population distribution.The generated population grid data from the model are compared and analyzed against real-world situations to verify the model's accu-racy.Improvement suggestions are proposed to gradually develop a simple,efficient,and application-oriented method for gridding population data that meets practical requirements.
The author,a practitioner and witness of earthquake group monitoring and group defense,reviews the history,develop-ment process,and the main work and achievements of earthquake group monitoring and group defense based on personal experiences.It is emphasized that earthquake group monitoring and group defense played a significant role in specific historical periods,leaving a vivid mark in the history of disaster prevention and reduction in our country.The article reminds everyone not to forget this history.
"Regional-Time-Length Algorithm"is a research method that describes the deviation of seismic activity level in a certain re-gion from its background seismic activity level.In this study,this method is applied to analyze the seismic activity variations before 8 significant earthquakes of magnitude 6.0 and above in the North China region since 1970.The results show that an enhancement of seismic activity is observed in all cases,with abnormal periods ranging from 5 to 24 months and significant deviations from the back-ground level.Additionally,the Fourier Transform is used to convert the obtained time-domain values into frequency-domain values,which further enhances the operability of this method.However,determining the extent to which the amplitude rise can be consid-ered abnormal during the change process requires comprehensive analysis in conjunction with other conditions.
To improve the efficiency of instrument calibration management for seismic monitoring station networks,a calibration man-agement software has been developed.The software is designed and developed using the C++ programming language,and it mainly includes five modules:user management,information query,calibration result entry,table output,and backend database.After ap-plying this software to the seismic monitoring station network in Shanxi,it optimizes the original calibration process,reduces calibra-tion time,enhances the efficiency of instrument calibration for the seismic monitoring station network,and achieves unified manage-ment of calibration information.
