The Baijigou Mine fire in Ningxia Province,which broke out on October 24,2003,affected more than 108 m3 of the mine and was probably the largest underground fire in China in recent years. In addition to its size,the f...The Baijigou Mine fire in Ningxia Province,which broke out on October 24,2003,affected more than 108 m3 of the mine and was probably the largest underground fire in China in recent years. In addition to its size,the fire was also characterized by excessive air leakage and the potential for violent methane explosions. A series of new measures were taken to fight the fire,including sealing intake tunnels with water,injecting three-phase foam through boreholes,and flushing with a large volume of nitrogen. The fire was successfully extinguished and production re-sumed soon afterwards; not one single methane explosion occurred during fire-fighting and afterwards.展开更多
For the purpose of study on forecasting forest fire behavior,a probability approach was presented to search ignition sources by multi-robot coordination. Firstly,the environment map is built based on Bayes rules. Then...For the purpose of study on forecasting forest fire behavior,a probability approach was presented to search ignition sources by multi-robot coordination. Firstly,the environment map is built based on Bayes rules. Then,the probability searching strategy based on the environment map was designed. Every grid of the searching area was assigned searching expectation value, and robots selected the grid with the highest expectation value as its searching target. The simulation results show the search time reduces greatly,which proves the feasibility and validity of the given algorithm under unknown fire condition.展开更多
The invention of this study harvests a portion of hydropower in the fire hose to drive a micro turbine generator and the electric power generated is used to light the LED （light-emitting diode） attached on the fire ...The invention of this study harvests a portion of hydropower in the fire hose to drive a micro turbine generator and the electric power generated is used to light the LED （light-emitting diode） attached on the fire nozzle for the illumination of dark scene （it is called nozzle light in this study）. The simulation and experiment are done to match the design of nozzle light. Nozzle light provides firefighters a synergistic function to spray the water and illuminate the fire field at the same time without requiring any extra hand to handle the light. It indeed increases both the efficiency of putting off a fire and the safety of firefighters. The most innovative benefit is that neither heavy battery nor utility wires are needed to get the lighting.展开更多
Protecting large-scale heritage settlements from being damaged by fires has become increasingly crucial in developing areas that lack adequate legislation, emergency planning, and particularly efficient techniques. Th...Protecting large-scale heritage settlements from being damaged by fires has become increasingly crucial in developing areas that lack adequate legislation, emergency planning, and particularly efficient techniques. This study provides a systematic emergency assessment methodology for evaluating the accessibility of specific fire-fighting techniques to mitigate fire hazards in historical towns and examines how the integration of municipal and local fire services works. Specifically, this paper examines the accessibility of fire trucks, local fire services and the overall protection capacity. There are quantitative calculations of the obstruction degrees on main streets, the feasible moving distances of fire-fighting vehicles and firefighters at a given time, and the fire protection coverage and intensity in each town. Using these methods, this paper systematically assesses the fire resistance of three historical towns, Chuansha, Gaoqiao and Fengjing, as case studies. In contrast to previous studies focusing on the vulnerability of buildings in large historical settlements, this assessment method combines an examination of street networks and various emergency response techniques and is particularly applicable to developing areas.展开更多
基金Project 50604014 supported by the National Natural Science Foundation of China
文摘The Baijigou Mine fire in Ningxia Province,which broke out on October 24,2003,affected more than 108 m3 of the mine and was probably the largest underground fire in China in recent years. In addition to its size,the fire was also characterized by excessive air leakage and the potential for violent methane explosions. A series of new measures were taken to fight the fire,including sealing intake tunnels with water,injecting three-phase foam through boreholes,and flushing with a large volume of nitrogen. The fire was successfully extinguished and production re-sumed soon afterwards; not one single methane explosion occurred during fire-fighting and afterwards.
基金Sponsored by the Fundamental Research Funds for the Central Universities of China(Grant No.DL12BB11)Program for New Century Excellent Talentsin University(Grant No.NCET-10-0279)Heilongjiang Province Postdoctoral Foundation(Grant No.LRB11-334)
文摘For the purpose of study on forecasting forest fire behavior,a probability approach was presented to search ignition sources by multi-robot coordination. Firstly,the environment map is built based on Bayes rules. Then,the probability searching strategy based on the environment map was designed. Every grid of the searching area was assigned searching expectation value, and robots selected the grid with the highest expectation value as its searching target. The simulation results show the search time reduces greatly,which proves the feasibility and validity of the given algorithm under unknown fire condition.
文摘The invention of this study harvests a portion of hydropower in the fire hose to drive a micro turbine generator and the electric power generated is used to light the LED （light-emitting diode） attached on the fire nozzle for the illumination of dark scene （it is called nozzle light in this study）. The simulation and experiment are done to match the design of nozzle light. Nozzle light provides firefighters a synergistic function to spray the water and illuminate the fire field at the same time without requiring any extra hand to handle the light. It indeed increases both the efficiency of putting off a fire and the safety of firefighters. The most innovative benefit is that neither heavy battery nor utility wires are needed to get the lighting.
基金Supported by"Hundred-Talent Programme research funding of Zhejiang University"and"Qishan Scholar Programme of Fuzhou University".
文摘Protecting large-scale heritage settlements from being damaged by fires has become increasingly crucial in developing areas that lack adequate legislation, emergency planning, and particularly efficient techniques. This study provides a systematic emergency assessment methodology for evaluating the accessibility of specific fire-fighting techniques to mitigate fire hazards in historical towns and examines how the integration of municipal and local fire services works. Specifically, this paper examines the accessibility of fire trucks, local fire services and the overall protection capacity. There are quantitative calculations of the obstruction degrees on main streets, the feasible moving distances of fire-fighting vehicles and firefighters at a given time, and the fire protection coverage and intensity in each town. Using these methods, this paper systematically assesses the fire resistance of three historical towns, Chuansha, Gaoqiao and Fengjing, as case studies. In contrast to previous studies focusing on the vulnerability of buildings in large historical settlements, this assessment method combines an examination of street networks and various emergency response techniques and is particularly applicable to developing areas.
