In this paper, we derive the distributions of concomitants of record values from generalized Farlie-Gumbel-Morgenstern family of bivariate distributions. We derive the single and the product moments of the concomitant...In this paper, we derive the distributions of concomitants of record values from generalized Farlie-Gumbel-Morgenstern family of bivariate distributions. We derive the single and the product moments of the concomitants for the general case. The results are then applied to the ease of the two-parameter exponential marginal distributions. Using concomitants of record values we derive the best linear unbiased estimators of parameters of the marginal distributions. Moreover, two methods for obtaining predictors of concomitants of record values are presented. Finally, a numerical illustration is performed to highlight the theoretical results obtained.展开更多
Errors have traditionally been a less commonly discussed topic but are becoming increasingly examined due to a trend towards expanded awareness about the high human and financial cost of errors in medicine. Recording ...Errors have traditionally been a less commonly discussed topic but are becoming increasingly examined due to a trend towards expanded awareness about the high human and financial cost of errors in medicine. Recording and reporting of errors has been a difficult issue in the health sector due to fear of litigation from patients, complaint to governing bodies, and embarrassment from colleagues. In this article we examine the advantages of prospective error recording. The studies on this subject report that the culture of prospective error recording is of high value in improving most parameters of errors and may indeed reduce complications.展开更多
In this article, the seismic records of Japan＇s Kik-net are selected to measure the acceleration, displacement, and effective peak acceleration of each seismic record within a certain time after P wave, then a contin...In this article, the seismic records of Japan＇s Kik-net are selected to measure the acceleration, displacement, and effective peak acceleration of each seismic record within a certain time after P wave, then a continuous estimation is given on earthquake early warning magnitude through statistical analysis method, and Wenchuan earthquake record is utilized to check the method. The results show that the reliability of earthquake early warning magnitude continuously increases with the increase of the seismic information, the biggest residual happens if the acceleration is adopted to fit earthquake magnitude, which may be caused by rich high-frequency components and large dispersion of peak value in acceleration record, the influence caused by the high-frequency components can be effectively reduced if the effective peak acceleration and peak displacement is adopted, it is estimated that the dispersion of earthquake magnitude obviously reduces, but it is easy for peak displacement to be affected by long-period drifting. In various components, the residual enlargement phenomenon at vertical direction is almost unobvious, thus it is recommended in this article that the effective peak acceleration at vertical direction is preferred to estimate earthquake early warning magnitude. Through adopting Wenchuan strong earthquake record to check the method mentioned in this article, it is found that this method can be used to quickly, stably, and accurately estimate the early warning magnitude of this earthquake, which shows that this method is completely applicable for earthquake early warning.展开更多
On the basis of previous studies, this paper in studying the coda Q-valuc of near shocks, has proposed using the sampling depth to describe the effect of lapse time on the Q-value, and has investigated the dependence...On the basis of previous studies, this paper in studying the coda Q-valuc of near shocks, has proposed using the sampling depth to describe the effect of lapse time on the Q-value, and has investigated the dependence of coda wave of earthquakes on frequency and sampling depth. Analysis of digital seismograms recorded by the Yinchuan Telemetric Seismic Network, Ningxia, shows that not only the coda wave Q-value of shocks is strongly dependent on frequency but also its dependence on Samling depth cannot be neglected. In the commonly used formula that describes the dependence cbaracteristics of coda Q-value of endquakes, Q = Qof', the parameter Qo rises obviously whilc n drops when the sampling depth increases, and their changes can be fitted by linear relations. This paper has explained such a characteristic. Whether this characteristic exists universally needs to be verified by more study results because the genetic mechanism of coda wave of earthquakes is more complex.展开更多
91 noteworthy ectomycorrhizal fungi associated with Larix sibirica Ledeb. etc. from Xing jiang are discussed. Hydnellum caeruleum(Horn. :Pers. )Karst. ,H. peckii Banker apud Peck,Cortinarius azureovelatus Orton,C. pin...91 noteworthy ectomycorrhizal fungi associated with Larix sibirica Ledeb. etc. from Xing jiang are discussed. Hydnellum caeruleum(Horn. :Pers. )Karst. ,H. peckii Banker apud Peck,Cortinarius azureovelatus Orton,C. pinicola Orton, C. rickenianus Maire are new record to China. Among which 66 species are edible, 14 species are poisonous, 13 species are pharmaceutical, 22 species are probably anticancer.展开更多
文摘In this paper, we derive the distributions of concomitants of record values from generalized Farlie-Gumbel-Morgenstern family of bivariate distributions. We derive the single and the product moments of the concomitants for the general case. The results are then applied to the ease of the two-parameter exponential marginal distributions. Using concomitants of record values we derive the best linear unbiased estimators of parameters of the marginal distributions. Moreover, two methods for obtaining predictors of concomitants of record values are presented. Finally, a numerical illustration is performed to highlight the theoretical results obtained.
文摘Errors have traditionally been a less commonly discussed topic but are becoming increasingly examined due to a trend towards expanded awareness about the high human and financial cost of errors in medicine. Recording and reporting of errors has been a difficult issue in the health sector due to fear of litigation from patients, complaint to governing bodies, and embarrassment from colleagues. In this article we examine the advantages of prospective error recording. The studies on this subject report that the culture of prospective error recording is of high value in improving most parameters of errors and may indeed reduce complications.
文摘In this article, the seismic records of Japan＇s Kik-net are selected to measure the acceleration, displacement, and effective peak acceleration of each seismic record within a certain time after P wave, then a continuous estimation is given on earthquake early warning magnitude through statistical analysis method, and Wenchuan earthquake record is utilized to check the method. The results show that the reliability of earthquake early warning magnitude continuously increases with the increase of the seismic information, the biggest residual happens if the acceleration is adopted to fit earthquake magnitude, which may be caused by rich high-frequency components and large dispersion of peak value in acceleration record, the influence caused by the high-frequency components can be effectively reduced if the effective peak acceleration and peak displacement is adopted, it is estimated that the dispersion of earthquake magnitude obviously reduces, but it is easy for peak displacement to be affected by long-period drifting. In various components, the residual enlargement phenomenon at vertical direction is almost unobvious, thus it is recommended in this article that the effective peak acceleration at vertical direction is preferred to estimate earthquake early warning magnitude. Through adopting Wenchuan strong earthquake record to check the method mentioned in this article, it is found that this method can be used to quickly, stably, and accurately estimate the early warning magnitude of this earthquake, which shows that this method is completely applicable for earthquake early warning.
文摘On the basis of previous studies, this paper in studying the coda Q-valuc of near shocks, has proposed using the sampling depth to describe the effect of lapse time on the Q-value, and has investigated the dependence of coda wave of earthquakes on frequency and sampling depth. Analysis of digital seismograms recorded by the Yinchuan Telemetric Seismic Network, Ningxia, shows that not only the coda wave Q-value of shocks is strongly dependent on frequency but also its dependence on Samling depth cannot be neglected. In the commonly used formula that describes the dependence cbaracteristics of coda Q-value of endquakes, Q = Qof', the parameter Qo rises obviously whilc n drops when the sampling depth increases, and their changes can be fitted by linear relations. This paper has explained such a characteristic. Whether this characteristic exists universally needs to be verified by more study results because the genetic mechanism of coda wave of earthquakes is more complex.
文摘91 noteworthy ectomycorrhizal fungi associated with Larix sibirica Ledeb. etc. from Xing jiang are discussed. Hydnellum caeruleum(Horn. :Pers. )Karst. ,H. peckii Banker apud Peck,Cortinarius azureovelatus Orton,C. pinicola Orton, C. rickenianus Maire are new record to China. Among which 66 species are edible, 14 species are poisonous, 13 species are pharmaceutical, 22 species are probably anticancer.
