The first task in prevention of diseases after an earthquake is to quickly provide an adequate source of safe drinking water.Otherwise,the incidence of infectious intestinal diseases in the disaster area residents wil...The first task in prevention of diseases after an earthquake is to quickly provide an adequate source of safe drinking water.Otherwise,the incidence of infectious intestinal diseases in the disaster area residents will increase rapidly.Additional health measures,such as disinfecting drinking water,protecting the water source,and treating disaster area residents,must be taken at the same time.The sensory test of meat is a useful index of meat decomposition levels.Corpse alkali is a kind of toxic chemical,and personal protective measures must be taken in handling corpses.In general,all of these measures are important not only for achieving the goal of“no severe epidemic after strong earthquake disaster”in the affected areas,but also for enriching knowledge of disaster medicine.1989 Academic Press.Inc.展开更多
A method for determining medium quality factor is developed on the basis of analyzing the attenuation dispersion of the arrived first period P wave. In order to enhance signal to noise ratio, improve the resolution in...A method for determining medium quality factor is developed on the basis of analyzing the attenuation dispersion of the arrived first period P wave. In order to enhance signal to noise ratio, improve the resolution in measurement and reduce systematic error we applied the data resampling technique. The group velocity delay of P wave was derived by using an improved multi-filtering method. Based on a linear viscoelastic relaxation model we deduced the medium quality factor Qm, and associated error with 95% confidence level. Applying the method to the seismic record of the Xiuyan M=5.4 earthquake sequences we obtained the following result: 1 High Qm started to appear from Nov. 9, 1999. The events giving the deduced high Qm value clustered in a region with their epicenter dis- tances being between 32 and 46 km to the Yingkou station. This Qm versus distance observation obviously deviates from the normal trend of Qm linearly increasing with distance. 2 The average Qm before the 29 Dec. 1999 M=5.4 earthquake is 460, while the average Qm between the M=5.4 event and the 12 Jan. 2000 M=5.1 earthquake is 391, and the average Qm after the M=5.1 event is 204.展开更多
文摘The first task in prevention of diseases after an earthquake is to quickly provide an adequate source of safe drinking water.Otherwise,the incidence of infectious intestinal diseases in the disaster area residents will increase rapidly.Additional health measures,such as disinfecting drinking water,protecting the water source,and treating disaster area residents,must be taken at the same time.The sensory test of meat is a useful index of meat decomposition levels.Corpse alkali is a kind of toxic chemical,and personal protective measures must be taken in handling corpses.In general,all of these measures are important not only for achieving the goal of“no severe epidemic after strong earthquake disaster”in the affected areas,but also for enriching knowledge of disaster medicine.1989 Academic Press.Inc.
基金State Key Project of Science and Technology during the Tenth Five-year Plan (2004BA601B01-03-01).
文摘A method for determining medium quality factor is developed on the basis of analyzing the attenuation dispersion of the arrived first period P wave. In order to enhance signal to noise ratio, improve the resolution in measurement and reduce systematic error we applied the data resampling technique. The group velocity delay of P wave was derived by using an improved multi-filtering method. Based on a linear viscoelastic relaxation model we deduced the medium quality factor Qm, and associated error with 95% confidence level. Applying the method to the seismic record of the Xiuyan M=5.4 earthquake sequences we obtained the following result: 1 High Qm started to appear from Nov. 9, 1999. The events giving the deduced high Qm value clustered in a region with their epicenter dis- tances being between 32 and 46 km to the Yingkou station. This Qm versus distance observation obviously deviates from the normal trend of Qm linearly increasing with distance. 2 The average Qm before the 29 Dec. 1999 M=5.4 earthquake is 460, while the average Qm between the M=5.4 event and the 12 Jan. 2000 M=5.1 earthquake is 391, and the average Qm after the M=5.1 event is 204.
