Due to the rapid development of society,public places,especially large shopping malls,are relatively frequent places for emergencies.Such emergencies not only seriously affect public security and property,but also bri...Due to the rapid development of society,public places,especially large shopping malls,are relatively frequent places for emergencies.Such emergencies not only seriously affect public security and property,but also bring great psychological pressure to citizens.Therefore,this study is of great significance for the exploration and study of public place emergencies.The research object of this study is the public shopping mall.Based on the AnyLogic simulation platform and guided by the relevant principles of social force model,this study utilize the pedestrian storehouse in the platform as the core module to build the simulation environment,and attempts to simulate the police force restraining effect on the overall event and the perpetrators after the occur of emergent incident under different police force allocations.In order to ensure the accuracy of the experimental data,the research team conducted field survey to estimate the average flow of people and the general data of the security personnel in shopping malls,also estimated the rest rain and capture time after repeated experiments.The results indicate that increasing additional police force outside the shopping malls and pre-organizing reasonable patrol routes can obviously facilitate police officers to restrain perpetrators.Meanwhile,it is also clear that the AnyLogic platform can effectively simulate pedestrian movement and interaction behaviour in emergencies.展开更多
Background:Endolymphatic sac tumor(ELST)is one of neuroectodermal tumor which arising from endolymphatic sac and duct.It is actually quite rare,with less than 200 cases reported.Although ELST presents benign appearanc...Background:Endolymphatic sac tumor(ELST)is one of neuroectodermal tumor which arising from endolymphatic sac and duct.It is actually quite rare,with less than 200 cases reported.Although ELST presents benign appearance in histopathology,it can present aggressive destructive behavior in clinical.The cornerstone of treatment for ELST is complete surgical excision.However,it is almost impossible to completely resect the advanced stage tumor.There is still controversy about other treatments,such as radiotherapy and gamma knife surgery.Case presentation:A 47-year-old man was admitted in The First Affiliated Hospital of Fujian Medical University with a 7-year history of progressive hearing loss and near 6-month repeated attacks of headache.Preoperative CT revealed a massive intracranial lesion and associated hydrocephalus.MR scanning demonstrated a 7.2 cm×4.6 cm×4.2 cm bulky mass located in left-sided posterior cranial fossa and temporo-occipital region which showed hyperintensity on T1-weighted images and mixed signal intensity on T2-weighted images.There was no neither clinical manifestation nor family history of Von Hippel–Lindau syndrome(VHL).Due to the mass that was large and invading the bone of skull base,it was difficult to extirpate surgically,so the ventriculoperitoneal shunt combined with local biopsy was performed.The postoperative pathology and immunohistochemical findings confirmed the lesion was an endolymphatic sac tumor.After operation,the patient regularly received radiotherapy.Conclusion:The widely accepted management of ELST is complete surgical resection.However,it is difficult for surgeons to achieve radical resection with late-stage ELST.Currently,there is much dispute about the role of radiotherapy for the management of ELST in academic circles.In this case where the mass cannot be surgical removed,radiotherapy has the curative effect for ELST in terms of disease control and quality of life.展开更多
文摘Due to the rapid development of society,public places,especially large shopping malls,are relatively frequent places for emergencies.Such emergencies not only seriously affect public security and property,but also bring great psychological pressure to citizens.Therefore,this study is of great significance for the exploration and study of public place emergencies.The research object of this study is the public shopping mall.Based on the AnyLogic simulation platform and guided by the relevant principles of social force model,this study utilize the pedestrian storehouse in the platform as the core module to build the simulation environment,and attempts to simulate the police force restraining effect on the overall event and the perpetrators after the occur of emergent incident under different police force allocations.In order to ensure the accuracy of the experimental data,the research team conducted field survey to estimate the average flow of people and the general data of the security personnel in shopping malls,also estimated the rest rain and capture time after repeated experiments.The results indicate that increasing additional police force outside the shopping malls and pre-organizing reasonable patrol routes can obviously facilitate police officers to restrain perpetrators.Meanwhile,it is also clear that the AnyLogic platform can effectively simulate pedestrian movement and interaction behaviour in emergencies.
文摘Background:Endolymphatic sac tumor(ELST)is one of neuroectodermal tumor which arising from endolymphatic sac and duct.It is actually quite rare,with less than 200 cases reported.Although ELST presents benign appearance in histopathology,it can present aggressive destructive behavior in clinical.The cornerstone of treatment for ELST is complete surgical excision.However,it is almost impossible to completely resect the advanced stage tumor.There is still controversy about other treatments,such as radiotherapy and gamma knife surgery.Case presentation:A 47-year-old man was admitted in The First Affiliated Hospital of Fujian Medical University with a 7-year history of progressive hearing loss and near 6-month repeated attacks of headache.Preoperative CT revealed a massive intracranial lesion and associated hydrocephalus.MR scanning demonstrated a 7.2 cm×4.6 cm×4.2 cm bulky mass located in left-sided posterior cranial fossa and temporo-occipital region which showed hyperintensity on T1-weighted images and mixed signal intensity on T2-weighted images.There was no neither clinical manifestation nor family history of Von Hippel–Lindau syndrome(VHL).Due to the mass that was large and invading the bone of skull base,it was difficult to extirpate surgically,so the ventriculoperitoneal shunt combined with local biopsy was performed.The postoperative pathology and immunohistochemical findings confirmed the lesion was an endolymphatic sac tumor.After operation,the patient regularly received radiotherapy.Conclusion:The widely accepted management of ELST is complete surgical resection.However,it is difficult for surgeons to achieve radical resection with late-stage ELST.Currently,there is much dispute about the role of radiotherapy for the management of ELST in academic circles.In this case where the mass cannot be surgical removed,radiotherapy has the curative effect for ELST in terms of disease control and quality of life.
