Study On Models & Approaches And Some Associated Theories Of Rapid Internet Service Of Earthquake Loss Estimation

This paper is conducted to study some kernel data process models,various effective methods ranging from data organization to spatial analysis and process,and some associated theoretic problems for building a rapid service platform of earthquake loss estimation. This study focuses on establishing a rapid,updatable and practical Internet service system of seismic hazard assessment.The data process model is the very important aspect of building such service platform. By analyzing seismic hazard estimate,rapid loss assessment and the whole process of the establishment of earthquake loss estimation at detail,an integrated and universal data processing model of earthquake loss estimation is presented in this paper. This model proposed can provide the feasible and basic clues for establishing a high efficient,updatable and practical system of earthquake loss estimation.The data structure of various relevant data plays an important role in realizing loss estimate service platform. This structure is the key factor of whether such service system is universal or not,and the basis for the expansion and update of this system. Moreover,the data process efficiency of this system is also based on the data structure. Four basic objects including point,line,region and grid dada objects are put forward,and their associated attribution objects are abstractly represented in this paper. These efforts can completely realize the organization,storage and access to various relevant data concerning such universal system of earthquake loss estimation.The data process of earthquake loss estimation and the visualization of calculating results are concerned with many relevant spatial analysis and process. According to this study,the feasible and effective solutions of various relevant spatial analysis and processing methods involved in earthquake loss estimation are described in this paper. These solutions can be listed as follows:(1) the projection of map;(2) the calculation of spatial distance in various cases;(3) the calculationof regional area;(4) the creation of boundary data for circle and ellipse;(5) the discrimination of location relationship between point and region;(6) the data creation of cross region between polygons,and (7) the data gridding processing of polygonal region.How to reduce the influences of the location error of seismic station network and some other factors on the deviation of macroseismic and seismic epicentre,in this rapid service system of earthquake loss estimation,is the important condition of increasing the rationality of loss estimation results. Therefore,the relationships of macroseismic epicentres and seismic epicentres of 133 main earthquakes in China and 66 events in North-South seismic belt with the active faults around these events are analyzed at detail in this paper. According to such results,a practical method to identify the most possible location of macroseismic epicentre has been proposed by the active faults around the instrumental epicentres.Seismic Catalog is the most important data in the earthquake loss estimation service system,while the evaluation of the seismic catalog completeness is the basis for conducting various relevant studies. In this paper,two methods are applied to provide the minimum completeness magnitude distribution of seismic catalog within the studied area for a given period. One is used to calculate the lower threshold of the controlled magnitude by seismic station network,which has paid significant role in the design for building seismic station network in the project named Capital Region Earthquake Prevention and Hazard Mitigation Demonstration Area. The other is applied to result in the distribution of the lower magnitude threshold that follows the G-R relation by directly analyzing seismic catalog. The advantage of this method is prominent when limiting the effective distance of earthquakes with various magnitudes in the catalog completeness analysis. The analysis for the china seismic catalog completeness in the end of 1980s shows that the results...