Objective: To assess the prevalence of Parkinson’s disease (PD) among African- Americans compared to non-Hispanic Whites in a tertiary urban Movement Disorders center. Background: Contributing factors in the prevalen...Objective: To assess the prevalence of Parkinson’s disease (PD) among African- Americans compared to non-Hispanic Whites in a tertiary urban Movement Disorders center. Background: Contributing factors in the prevalence of Parkinson’s disease (PD) based on race may improve health disparities in the United States. According to the largest study analyzing prevalence and incidence of PD among Medicare beneficiaries, the ratio of African-Americans (AA) to Caucasians in the general Medicare population is 9%, while the prevalence ratio of PD among AA compared to Caucasians is approximately 5%. Methods: We performed a retrospective analysis of African-American patients with PD in the movement disorders database at Boston Medical Center, which is the largest safety net hospital in New England. The demographics of the patients seen in the general neurology clinic are 30.57% AA and 38.06% non-Hispanic Caucasian. Results: The Movement disorders database included 488 patients, 327 of whom had PD. Of these, 287 were Caucasians and 18 were of African descent. Based on our clinic population the expected PD case ratio among AA compared to Caucasians was approximately 49%. The actual race ratio in patients of African descent compared to Caucasian was 6%, which was substantially lower than expected at Boston Medical Center. Conclusion: The demographics of the PD patients in our movement disorders clinic do not reflect the population at Boston Medical Center, or the demographics of our neurology clinic as a whole.展开更多
Based on the optimal velocity car-following model, in this paper, we propose an improved model for simulating train movement in an urban railway in which the regenerative energy of a train is considered. Here a new ad...Based on the optimal velocity car-following model, in this paper, we propose an improved model for simulating train movement in an urban railway in which the regenerative energy of a train is considered. Here a new additional term is introduced into a traditional car-following model. Our aim is to analyze and discuss the dynamic characteristics of the train movement when the regenerative energy is utilized by the electric locomotive. The simulation results indicate that the improved car-following model is suitable for simulating the train movement. Further, some qualitative relationships between regenerative energy and dynamic characteristics of a train are investigated, such as the measurement data of regenerative energy presents a power-law distribution. Our results are useful for optimizing the design and plan of urban railway systems.展开更多
Shanghai should orient its development to becoming a global science and technology innovation center. Now,it plans to launch a strategic research of new round of development in 2050,carry out future urban planning res...Shanghai should orient its development to becoming a global science and technology innovation center. Now,it plans to launch a strategic research of new round of development in 2050,carry out future urban planning research in 2040,and started start the implementation of thirteenth five-year development planning research. In this process,it is required to fully consider the impact of a new round of scientific and technological revolution and industrial reform,include the construction of global innovation center into the layout of the future development of Shanghai,formulate global scientific and technological innovation center development strategy,and further make clear the leading and support function of scientific and technological innovation to economic and social development of Shanghai. This paper analyzed the relationship between Big Cloud Movement and " Maker",and the necessities for cultivating " Maker" urban culture to building Shanghai global scientific and technological innovation center. On this basis,it elaborated and analyzed how to integrate the Maker Culture into Shanghai urban culture. Finally,it came up with recommendations for establishing Shanghai " Maker" urban culture.展开更多
文摘Objective: To assess the prevalence of Parkinson’s disease (PD) among African- Americans compared to non-Hispanic Whites in a tertiary urban Movement Disorders center. Background: Contributing factors in the prevalence of Parkinson’s disease (PD) based on race may improve health disparities in the United States. According to the largest study analyzing prevalence and incidence of PD among Medicare beneficiaries, the ratio of African-Americans (AA) to Caucasians in the general Medicare population is 9%, while the prevalence ratio of PD among AA compared to Caucasians is approximately 5%. Methods: We performed a retrospective analysis of African-American patients with PD in the movement disorders database at Boston Medical Center, which is the largest safety net hospital in New England. The demographics of the patients seen in the general neurology clinic are 30.57% AA and 38.06% non-Hispanic Caucasian. Results: The Movement disorders database included 488 patients, 327 of whom had PD. Of these, 287 were Caucasians and 18 were of African descent. Based on our clinic population the expected PD case ratio among AA compared to Caucasians was approximately 49%. The actual race ratio in patients of African descent compared to Caucasian was 6%, which was substantially lower than expected at Boston Medical Center. Conclusion: The demographics of the PD patients in our movement disorders clinic do not reflect the population at Boston Medical Center, or the demographics of our neurology clinic as a whole.
基金Project supported by the National High Technology Research and Development Program of China(Grant No.2011AA110502)the National Natural Science Foundation of China(Grant No.71271022)
文摘Based on the optimal velocity car-following model, in this paper, we propose an improved model for simulating train movement in an urban railway in which the regenerative energy of a train is considered. Here a new additional term is introduced into a traditional car-following model. Our aim is to analyze and discuss the dynamic characteristics of the train movement when the regenerative energy is utilized by the electric locomotive. The simulation results indicate that the improved car-following model is suitable for simulating the train movement. Further, some qualitative relationships between regenerative energy and dynamic characteristics of a train are investigated, such as the measurement data of regenerative energy presents a power-law distribution. Our results are useful for optimizing the design and plan of urban railway systems.
基金Supported by General Research Project for Education and Science of Shanghai(C16064)Key Project for Undergraduate Education Reform of Colleges and Universities in Shanghai"Research and Practice of Interdisciplinary Cooperation in Shipping Talent Cultivation from the Perspective of Innovation and Entrepreneurship Education"
文摘Shanghai should orient its development to becoming a global science and technology innovation center. Now,it plans to launch a strategic research of new round of development in 2050,carry out future urban planning research in 2040,and started start the implementation of thirteenth five-year development planning research. In this process,it is required to fully consider the impact of a new round of scientific and technological revolution and industrial reform,include the construction of global innovation center into the layout of the future development of Shanghai,formulate global scientific and technological innovation center development strategy,and further make clear the leading and support function of scientific and technological innovation to economic and social development of Shanghai. This paper analyzed the relationship between Big Cloud Movement and " Maker",and the necessities for cultivating " Maker" urban culture to building Shanghai global scientific and technological innovation center. On this basis,it elaborated and analyzed how to integrate the Maker Culture into Shanghai urban culture. Finally,it came up with recommendations for establishing Shanghai " Maker" urban culture.
