Spontaneous combustion of coal is a major cause of coal mine fires.It not only poses a severe hazard to the safe extraction of coal resources,but also jeopardizes the safety of mine workers.The development of a scient...Spontaneous combustion of coal is a major cause of coal mine fires.It not only poses a severe hazard to the safe extraction of coal resources,but also jeopardizes the safety of mine workers.The development of a scientific management system of coal spontaneous combustion is of vital importance to the safe production of coal mine.This paper provides a comparative analysis of a range of worldwide prediction techniques and methods for coal spontaneous combustion,and systematically introduces the trigger action response plans(TARPs)system used in Australian coal mines for managing the spontaneous heating of coal.An artificial neural network model has been established on the basis of real coal mine operational conditions.Through studying and training the neural network model,prediction errors can be controlled within the allowable range.The trained model is then applied to the conditions of Nos.1 and 3 coal seams located in Weijiadi Coal Mine to demonstrate its feasibility for spontaneous combustion assessment.Based upon the TARPs system which is commonly used in Australian longwall mines,a TARPs system has been developed for Weijiadi Coal Mine to assist the management of spontaneous combustion hazard and ensure the safe operation of its mining activities.展开更多
We introduce first a sort of gray-scale morphological dilations and erosions, which might have some further applications in image analysis. Then we show that the dilation and the erosion defined here form adjunctive p...We introduce first a sort of gray-scale morphological dilations and erosions, which might have some further applications in image analysis. Then we show that the dilation and the erosion defined here form adjunctive pairs. The duality between the dilation and the erosion and some other properties, such as the commuting property with translation and homothety, of these operators are discussed as well.展开更多
A new cellular neural network (CNN) with nonlinear templates is presented forextracting convex corners of objects in gray-scale images. Application examples showed that the newCNN can even detect convex corner charact...A new cellular neural network (CNN) with nonlinear templates is presented forextracting convex corners of objects in gray-scale images. Application examples showed that the newCNN can even detect convex corner characteristics of objects in images with Gaussian noise.展开更多
目的探讨经口寰枢椎复位钢板(TARP)内固定术后椎前软组织(PVST)肿胀的特征及临床意义。方法回顾性分析施行TARP内固定术(TARP内固定组)、C3/4前路减压椎体内固定手术(C3/4减压组)及C5/6前路减压椎体内固定手术(C5/6减压组)3组患者的临...目的探讨经口寰枢椎复位钢板(TARP)内固定术后椎前软组织(PVST)肿胀的特征及临床意义。方法回顾性分析施行TARP内固定术(TARP内固定组)、C3/4前路减压椎体内固定手术(C3/4减压组)及C5/6前路减压椎体内固定手术(C5/6减压组)3组患者的临床资料,每组32例。记录患者性别、年龄、身高、体质量、病因、美国脊髓损伤协会(ASIA)分级、手术前后白细胞(WBC)及白蛋白(ALB)、手术时间、术中出血量、补液量、拔管时间,记录术后再插管和吞咽困难例数。测量患者术前及术后3 d C2~C43个节段的PVST厚度。结果与C3/4减压组、C5/6减压组比较,TARP内固定组患者以女性居多、均由疾病所致、平均身高较矮、ASIA D级占比多、手术时间长、拔管延迟、术后WBC显著较高,差异具有统计学意义(P<0.05);而3组患者年龄、体质量、术中出血量及补液量、手术前后ALB水平比较,差异无统计学意义(P>0.05)。3组患者均未出现术后再插管及吞咽困难。术前3组患者PVST厚度差异无统计学意义(P>0.05)。术后3 d 3组患者C2~C43个节段的PVST厚度均显著大于术前(P<0.05),且TARP内固定组C2~C43个节段的PVST厚度增幅显著大于C3/4减压组、C5/6减压组(P<0.05),增幅为后2组的1.29~2.5倍。结论TARP内固定术后3 d C2~C43个节段的PVST仍呈现明显肿胀,厚度显著大于C3/4及C5/6前路减压椎体内固定手术患者,术后需加强气道管理,严格掌握拔管指征,严防PVST肿胀导致的气道梗阻和吞咽困难等并发症。展开更多
The trigger action response plans(TARPs) are inherent to managing the multiple hazards such as: high gas content with multiple coal seams, high spontaneous combustion(sponcom) propensity, heat and ventilation. TARPs a...The trigger action response plans(TARPs) are inherent to managing the multiple hazards such as: high gas content with multiple coal seams, high spontaneous combustion(sponcom) propensity, heat and ventilation. TARPs aim to provide assurance and guidance when the situation deviates from the original plan or there is a change conditions that could be hazardous. Over the years, learnings from various incidents has continuously required the coal operations to re-visit the TARP trigger values that were based on historic data or based on guidance values from the industry. In most cases, the background to the basis of TARP statistical data, viz., average, maximum, hourly, daily for the monitoring or sampling location is also unknown. Introduction of real-time monitoring devices to monitor the gases and airflows has provided greater understanding of the hazard scenarios and their controls. This paper analyses the carbon monoxide data from operating longwall mines and compares these with the historic trigger values to understand the changes and determine improvement opportunities while setting trigger levels in the TARPs.As an example of setting trigger values, those used in during the sealing of a panel are explored in terms of setting values based upon the sampling location and the level of risk. It is envisaged that the learning's shared herein would further enhance the understanding and management of multiple hazards in Australian coal mines.展开更多
基金provided for this work by the China Scholarship CouncilNational Natural Science Funds of China(No.51304212)
文摘Spontaneous combustion of coal is a major cause of coal mine fires.It not only poses a severe hazard to the safe extraction of coal resources,but also jeopardizes the safety of mine workers.The development of a scientific management system of coal spontaneous combustion is of vital importance to the safe production of coal mine.This paper provides a comparative analysis of a range of worldwide prediction techniques and methods for coal spontaneous combustion,and systematically introduces the trigger action response plans(TARPs)system used in Australian coal mines for managing the spontaneous heating of coal.An artificial neural network model has been established on the basis of real coal mine operational conditions.Through studying and training the neural network model,prediction errors can be controlled within the allowable range.The trained model is then applied to the conditions of Nos.1 and 3 coal seams located in Weijiadi Coal Mine to demonstrate its feasibility for spontaneous combustion assessment.Based upon the TARPs system which is commonly used in Australian longwall mines,a TARPs system has been developed for Weijiadi Coal Mine to assist the management of spontaneous combustion hazard and ensure the safe operation of its mining activities.
基金Supported by the National Natural Science Foundation of China（11671293, 11271282）
文摘We introduce first a sort of gray-scale morphological dilations and erosions, which might have some further applications in image analysis. Then we show that the dilation and the erosion defined here form adjunctive pairs. The duality between the dilation and the erosion and some other properties, such as the commuting property with translation and homothety, of these operators are discussed as well.
基金This project is jointly supported by the National Nature Science Foundation of China(Nos.60074034,70271068),the Research Fund for the Doctoral Program of Higher Education(No.20020008004)and the Foundation for University Key Teacher by the Ministry of Ed
文摘A new cellular neural network (CNN) with nonlinear templates is presented forextracting convex corners of objects in gray-scale images. Application examples showed that the newCNN can even detect convex corner characteristics of objects in images with Gaussian noise.
文摘目的探讨经口寰枢椎复位钢板(TARP)内固定术后椎前软组织(PVST)肿胀的特征及临床意义。方法回顾性分析施行TARP内固定术(TARP内固定组)、C3/4前路减压椎体内固定手术(C3/4减压组)及C5/6前路减压椎体内固定手术(C5/6减压组)3组患者的临床资料,每组32例。记录患者性别、年龄、身高、体质量、病因、美国脊髓损伤协会(ASIA)分级、手术前后白细胞(WBC)及白蛋白(ALB)、手术时间、术中出血量、补液量、拔管时间,记录术后再插管和吞咽困难例数。测量患者术前及术后3 d C2~C43个节段的PVST厚度。结果与C3/4减压组、C5/6减压组比较,TARP内固定组患者以女性居多、均由疾病所致、平均身高较矮、ASIA D级占比多、手术时间长、拔管延迟、术后WBC显著较高,差异具有统计学意义(P<0.05);而3组患者年龄、体质量、术中出血量及补液量、手术前后ALB水平比较,差异无统计学意义(P>0.05)。3组患者均未出现术后再插管及吞咽困难。术前3组患者PVST厚度差异无统计学意义(P>0.05)。术后3 d 3组患者C2~C43个节段的PVST厚度均显著大于术前(P<0.05),且TARP内固定组C2~C43个节段的PVST厚度增幅显著大于C3/4减压组、C5/6减压组(P<0.05),增幅为后2组的1.29~2.5倍。结论TARP内固定术后3 d C2~C43个节段的PVST仍呈现明显肿胀,厚度显著大于C3/4及C5/6前路减压椎体内固定手术患者,术后需加强气道管理,严格掌握拔管指征,严防PVST肿胀导致的气道梗阻和吞咽困难等并发症。
文摘The trigger action response plans(TARPs) are inherent to managing the multiple hazards such as: high gas content with multiple coal seams, high spontaneous combustion(sponcom) propensity, heat and ventilation. TARPs aim to provide assurance and guidance when the situation deviates from the original plan or there is a change conditions that could be hazardous. Over the years, learnings from various incidents has continuously required the coal operations to re-visit the TARP trigger values that were based on historic data or based on guidance values from the industry. In most cases, the background to the basis of TARP statistical data, viz., average, maximum, hourly, daily for the monitoring or sampling location is also unknown. Introduction of real-time monitoring devices to monitor the gases and airflows has provided greater understanding of the hazard scenarios and their controls. This paper analyses the carbon monoxide data from operating longwall mines and compares these with the historic trigger values to understand the changes and determine improvement opportunities while setting trigger levels in the TARPs.As an example of setting trigger values, those used in during the sealing of a panel are explored in terms of setting values based upon the sampling location and the level of risk. It is envisaged that the learning's shared herein would further enhance the understanding and management of multiple hazards in Australian coal mines.
