We report on the properties of strong pulses from PSR B0656＋14 by analyzing the data obtained using the Urumqi 25-m radio telescope at 1540 MHz from August 2007 to September 2010.In 44 h of observational data,a total...We report on the properties of strong pulses from PSR B0656＋14 by analyzing the data obtained using the Urumqi 25-m radio telescope at 1540 MHz from August 2007 to September 2010.In 44 h of observational data,a total of 67 pulses with signal-to-noise ratios above a 5σthreshold were detected.The peak flux densities of these pulses are 58 to 194 times that of the average profile,and their pulse energies are 3 to 68 times that of the average pulse.These pulses are clustered around phases about 5-ahead of the peak of the average profile.Compared with the width of the average profile,they are relatively narrow,with the full widths at half-maximum ranging from 0.28 ° to 1.78 °.The distribution of pulse-energies follows a lognormal distribution.These sporadic strong pulses detected from PSR B0656＋14 have different characteristics from both typical giant pulses and its regular pulses.展开更多
We consider a modified Markov branching process incorporating with both state-independent immigration-migration and resurrection. The effect of state-independent immigration-migration is firstly in- vestigated in deta...We consider a modified Markov branching process incorporating with both state-independent immigration-migration and resurrection. The effect of state-independent immigration-migration is firstly in- vestigated in detail. The explicit expressions for the extinction probabilities and mean extinction times are presented. The ergodicity and stability properties of the process incorporating with resurrection structure are then investigated. The conditions for recurrence, ergodicity and exponential ergodicity are obtained. An explicit expression for the equilibrium distribution is also presented. As a preparation, the criteria for regularity and uniqueness for such structure are firstly established.展开更多
One of the major management problems in and around protected areas is the intensifying conflict between local people and wildlife,especially large carnivores.Livestock depredation and human fatalities caused by attack...One of the major management problems in and around protected areas is the intensifying conflict between local people and wildlife,especially large carnivores.Livestock depredation and human fatalities caused by attacks of carnivores are found to be serious obstacles in conflict management.This study aims to explore the patterns,costs,causes and perceptions of human large carnivore conflict in the Nawalpur area of Chitwan National Park.The patterns of livestock loss and human casualties due to large carnivores(Panthera tigris and Panthera pardus)were analysed using the secondary data reported to Chitwan National Park from 2001 to 2019.To understand the people’s perception towards carnivores and wildlife conservation,150 victim respondents were asked,with one household selected from each grid.During 19-year study period,a total of 521 incidents caused by large carnivores were reported,which included 33 human casualties and 488 livestock depredations.Tiger was responsible for the maximum conflict incidents in Nawalpur.The total relief provided for human deaths and injuries was US$17524.41,whereas US$13702.18 was used to compensate for livestock depredation in the Nawalpur area by authorities of the Chitwan National Park.More than 64%of the respondents liked the presence of carnivores in their area and had a positive attitude toward the conservation of large carnivores,even though the carnivores were responsible for livestock depredation and human injury and death.People’s satisfaction with the relief scheme provided by the government depended on ethnicity,gender,age class,occupation,education,insurance,and livestock ownership,but they believed the scheme was not effective.Hence,an effective relief scheme and awareness about the process of relief funding should be conducted in conflict areas.Conducting awareness programs for local communities about large carnivores,their behavior,and preparing predator-proof corrals would be helpful in minimizing conflict in the study area.展开更多
基金funded by the National Natural Science Foundation of China(Grant No.10973026)
文摘We report on the properties of strong pulses from PSR B0656＋14 by analyzing the data obtained using the Urumqi 25-m radio telescope at 1540 MHz from August 2007 to September 2010.In 44 h of observational data,a total of 67 pulses with signal-to-noise ratios above a 5σthreshold were detected.The peak flux densities of these pulses are 58 to 194 times that of the average profile,and their pulse energies are 3 to 68 times that of the average pulse.These pulses are clustered around phases about 5-ahead of the peak of the average profile.Compared with the width of the average profile,they are relatively narrow,with the full widths at half-maximum ranging from 0.28 ° to 1.78 °.The distribution of pulse-energies follows a lognormal distribution.These sporadic strong pulses detected from PSR B0656＋14 have different characteristics from both typical giant pulses and its regular pulses.
基金supported by National Natural Science Foundations of China (Grant Nos. 10771216 and 11071259)
文摘We consider a modified Markov branching process incorporating with both state-independent immigration-migration and resurrection. The effect of state-independent immigration-migration is firstly in- vestigated in detail. The explicit expressions for the extinction probabilities and mean extinction times are presented. The ergodicity and stability properties of the process incorporating with resurrection structure are then investigated. The conditions for recurrence, ergodicity and exponential ergodicity are obtained. An explicit expression for the equilibrium distribution is also presented. As a preparation, the criteria for regularity and uniqueness for such structure are firstly established.
文摘One of the major management problems in and around protected areas is the intensifying conflict between local people and wildlife,especially large carnivores.Livestock depredation and human fatalities caused by attacks of carnivores are found to be serious obstacles in conflict management.This study aims to explore the patterns,costs,causes and perceptions of human large carnivore conflict in the Nawalpur area of Chitwan National Park.The patterns of livestock loss and human casualties due to large carnivores(Panthera tigris and Panthera pardus)were analysed using the secondary data reported to Chitwan National Park from 2001 to 2019.To understand the people’s perception towards carnivores and wildlife conservation,150 victim respondents were asked,with one household selected from each grid.During 19-year study period,a total of 521 incidents caused by large carnivores were reported,which included 33 human casualties and 488 livestock depredations.Tiger was responsible for the maximum conflict incidents in Nawalpur.The total relief provided for human deaths and injuries was US$17524.41,whereas US$13702.18 was used to compensate for livestock depredation in the Nawalpur area by authorities of the Chitwan National Park.More than 64%of the respondents liked the presence of carnivores in their area and had a positive attitude toward the conservation of large carnivores,even though the carnivores were responsible for livestock depredation and human injury and death.People’s satisfaction with the relief scheme provided by the government depended on ethnicity,gender,age class,occupation,education,insurance,and livestock ownership,but they believed the scheme was not effective.Hence,an effective relief scheme and awareness about the process of relief funding should be conducted in conflict areas.Conducting awareness programs for local communities about large carnivores,their behavior,and preparing predator-proof corrals would be helpful in minimizing conflict in the study area.
