This work introduces the Queen's University Agent-Based Outbreak Outcome Model(QUABOOM).This tool is an agent-based Monte Carlo simulation for modelling epidemics and informing public health policy.We illustrate t...This work introduces the Queen's University Agent-Based Outbreak Outcome Model(QUABOOM).This tool is an agent-based Monte Carlo simulation for modelling epidemics and informing public health policy.We illustrate the use of the model by examining capacity restrictions during a lockdown.We find that public health measures should focus on the few locations where many people interact,such as grocery stores,rather than the many locations where few people interact,such as small businesses.We also discuss a case where the results of the simulation can be scaled to larger population sizes,thereby improving computational efficiency.展开更多
An automatic adiabatic calorimeter for measuring heat capacities in the temperature range 70-580K, equipped with a small sample cell of 7.4 cm3 in the internal volume has been developed. In order to obtain a good adia...An automatic adiabatic calorimeter for measuring heat capacities in the temperature range 70-580K, equipped with a small sample cell of 7.4 cm3 in the internal volume has been developed. In order to obtain a good adiabatic condition of the calorimeter at high temperature, the calorimeter was surrounded in sequence by two adiabatic shields, three radiation shields and an auxiliary temperature-controlled sheath. The main body of the cell made of copper and the lid made of brass are silver-soldered and the cell is sealed with a copper screw cap. A sealing gasket made of Pb- Sn alloy is put between the cap and the lid to ensure a high vacuum sealing of the cell in the whole experimental temperature range. All the leads are insulated and fixed with W30-11 varnish, thus a good electric insulation is obtained at high temperature. All the experimental data, including those for energy and temperature are collected and processed automatically with a personal computer using a predetermined program. To verify the accuracy of the calorimeter, the heat capacities of α-Al2O3 of the calorimetric standard reference material is measured. The standard deviations of experimental heat capacity values from the smoothed values are within ±0.28%, while the inaccuracy is within ±0.4% compared with those of the National Bureau of Standards over the entire working temperature range.展开更多
基金support of the Department of Physics,Engineering Physics&Astronomy at Queen's University through a research initiation grant,the Queen's University Arts and Science Research Fundthe Queen's University Bartlett Student Initiatives Fundthe Natural Sciences and Engineering Research Council of Canada,funding reference number SAPIN-2017-00023.
文摘This work introduces the Queen's University Agent-Based Outbreak Outcome Model(QUABOOM).This tool is an agent-based Monte Carlo simulation for modelling epidemics and informing public health policy.We illustrate the use of the model by examining capacity restrictions during a lockdown.We find that public health measures should focus on the few locations where many people interact,such as grocery stores,rather than the many locations where few people interact,such as small businesses.We also discuss a case where the results of the simulation can be scaled to larger population sizes,thereby improving computational efficiency.
基金Project supported by the National Natural Science Foundation of China (Grant No. 29573133).
文摘An automatic adiabatic calorimeter for measuring heat capacities in the temperature range 70-580K, equipped with a small sample cell of 7.4 cm3 in the internal volume has been developed. In order to obtain a good adiabatic condition of the calorimeter at high temperature, the calorimeter was surrounded in sequence by two adiabatic shields, three radiation shields and an auxiliary temperature-controlled sheath. The main body of the cell made of copper and the lid made of brass are silver-soldered and the cell is sealed with a copper screw cap. A sealing gasket made of Pb- Sn alloy is put between the cap and the lid to ensure a high vacuum sealing of the cell in the whole experimental temperature range. All the leads are insulated and fixed with W30-11 varnish, thus a good electric insulation is obtained at high temperature. All the experimental data, including those for energy and temperature are collected and processed automatically with a personal computer using a predetermined program. To verify the accuracy of the calorimeter, the heat capacities of α-Al2O3 of the calorimetric standard reference material is measured. The standard deviations of experimental heat capacity values from the smoothed values are within ±0.28%, while the inaccuracy is within ±0.4% compared with those of the National Bureau of Standards over the entire working temperature range.
