The planetary radio occultation technique is one of the earliest suggested and achieved methods to detect the planetary atmosphere,and has been conducted by almost every deep space planetary probe.The principles,modul...The planetary radio occultation technique is one of the earliest suggested and achieved methods to detect the planetary atmosphere,and has been conducted by almost every deep space planetary probe.The principles,modules,inversion results and primary analysis of the SHAO Planetary Occultation observation Processing system(SPOPs) are presented in this paper.Utilizing open-loop and closed-loop Doppler residual data of the Mars Express radio occultation experiment provided by ESA PSA and NASA PDS,the temperature,pressure,molecular number density profiles of Martian atmosphere and electron density profiles of the ionosphere are successfully retrieved,and the results are validated by the released radio science level 04 products of the ESA MaRS group.This system can also process the atmosphere radio occultation observations of other planets and theirs natural satellites.The implementation of the planetary radio occultation technique is of significance to China's YH-1 Mars exploration project,as well as for future planetary exploration missions from China.展开更多
The authors investigate the opinion dynamics in a setting where some special agents induce public opinions towards their desired direction,with Particular Goal(PG agents for short)to manipulate beliefs.Based on the bo...The authors investigate the opinion dynamics in a setting where some special agents induce public opinions towards their desired direction,with Particular Goal(PG agents for short)to manipulate beliefs.Based on the bounded confidence model,the authors find PG agents can significantly improve the level of consensus.The authors also study how opinion pattern is influenced by varying the model in terms of changing the network structure,different parameters,and PG agents choosing strategy.The authors conduct the comparison of model results with empirical data from online social networks.The authors hope the study may shade a light on public opinion control and regulation.展开更多
基金supported by the Sino-Russian Cooperation "YH-1" Mars Exploration Project (Grant No. 2008AA12A209)the National High-tech Research and Development Program of China (Grant No. 2009AA122206, 2008AA12A210, 2009AA12Z319)the National Nataral Science Foundation of China (Grant No. 10973031)
文摘The planetary radio occultation technique is one of the earliest suggested and achieved methods to detect the planetary atmosphere,and has been conducted by almost every deep space planetary probe.The principles,modules,inversion results and primary analysis of the SHAO Planetary Occultation observation Processing system(SPOPs) are presented in this paper.Utilizing open-loop and closed-loop Doppler residual data of the Mars Express radio occultation experiment provided by ESA PSA and NASA PDS,the temperature,pressure,molecular number density profiles of Martian atmosphere and electron density profiles of the ionosphere are successfully retrieved,and the results are validated by the released radio science level 04 products of the ESA MaRS group.This system can also process the atmosphere radio occultation observations of other planets and theirs natural satellites.The implementation of the planetary radio occultation technique is of significance to China's YH-1 Mars exploration project,as well as for future planetary exploration missions from China.
基金the National Natural Science Foundation of China under Grant Nos.71661001 and 71730002。
文摘The authors investigate the opinion dynamics in a setting where some special agents induce public opinions towards their desired direction,with Particular Goal(PG agents for short)to manipulate beliefs.Based on the bounded confidence model,the authors find PG agents can significantly improve the level of consensus.The authors also study how opinion pattern is influenced by varying the model in terms of changing the network structure,different parameters,and PG agents choosing strategy.The authors conduct the comparison of model results with empirical data from online social networks.The authors hope the study may shade a light on public opinion control and regulation.
