基于Agent的长输管道应急指挥决策系统设计

为帮助决策机构快速高效地制定长输管道事故应急救援方案和行动目标,运用Agent (真体)对长输管道应急指挥决策系统进行设计.通过划分应急指挥系统层次,分析信息融合Agent、形势评估Agent、资源规划Agent这3个关键模块,建立基于Agent的应急指挥过程模型.结合应急指挥机构和应急指挥决策系统,提出应急指挥系统...     

应急救援中紧急冲淋设备的研讨

随着国家经济的飞速发展,减少作业人员在事故发生时所受到的职业危害尤为重要。本文对紧急冲淋设备的技术性能、作用进行了一定探讨与描述,希望对企业正确的配备紧急冲淋设备有所帮助。     

功能共振事故模型在可控飞行撞地事故分析中的应用

介绍了功能共振理论,说明了事故发生机理,描述了功能单位,介绍了一般性能条件和功能性能波动状态,以及功能共振事故模型分析步骤。利用功能共振事故模型对可控飞行撞地事故进行了分析,识别描述了功能单位,建立了功能网络;根据一般性能条件评价了各个功能单位性能波动状态,在评价结果基础上分析了各个功能单位性能波动状态,确定了＂管制员发出下降指令＂和＂输入导航点信息＂两个随机状态功能单位;进一步分析了功能共振和失效功能连接,以及影响功能共振的功能因素,建立了功能共振失效网络,确定了＂管制员发出下降指令＂、＂输入导航点信息＂、＂保持下降航路＂、＂到达指定导航点＂四个功能共振单位;最后识别出了波动障碍,并制定了＂调整飞行管理系统导航点信息显示方式＂等多个性能监测措施管理可控飞行撞地功能性能波动。     

速差自控器动态性能试验方法的改进

为施工人员选择和配置安全可靠的个人防坠器,每年送到具有相应资质的检测单位进行强制检定,是防止高处坠落事故的重要手段。某型速差自控器在冲击试验中发生了钢丝绳断裂事故,为了查找和分析事故的真正原因,对不同厂家的速差自控器抽样,在相同试验方法和检测条件下进行冲击试验,并根据相关的标准对试验结果进行力学性能对比分析研究,找到了造成钢丝绳断裂事故的主要原因是该类型速差自控器使用的钢丝绳直径偏细以及缺少内部或外部缓冲器,研究中还发现部分国内标准技术要求不够明确,制造、检测和使用方对速差自控器相关标准理解存在偏差,是造成本次事故的间接原因。针对现有的部分速差自控器产品存在的质量问题,并根据现行最新标准和实际工作条件,提出改进了的检测方法和防范措施,从源头上防范坠落事故。     

槐糖脂生物表面活性剂的结构特征及理化性质初探

通过摇瓶培养实验,考察了假丝酵母菌（Candida bombicola）ATCC 22214以葡萄糖和油酸双底物为碳源,采用一次加料培养和分批补料培养方式进行发酵制备槐糖脂的过程,并利用高效液相色谱/电喷雾飞行时间质谱联用仪确定了所产槐糖脂的结构,初步研究了其主要的理化性质.结果表明,一次加料培养中,该菌株生长稳定期的...     

Information technology and emergency management: preparedness and planning in US states

The purpose of this paper is to examine the impact of information technology (IT) on emergency preparedness and planning by analysing a survey of US state government departments of emergency management. The research results show that there has been a significant impact of IT on emergency planning. IT has proven to be effective for all phases of emergency management, but especially for the response phase. There are numerous technologies used in emergency management, ranging from the internet, Geographic Information Systems and wireless technologies to more advanced hazard analysis models. All were generally viewed as being effective. Lack of financial resources and support from elected officials is a perennial problem in public administration, and was found to be prevalent in this study of IT and emergency management. There was evidence that state governments rating high on a performance index were more likely to use IT for emergency management.     

O3/H2O2氧化苯乙烯气体性能及机制

O3/H2O2体系能产生大量自由基,臭氧与自由基的耦合氧化作用能提高苯乙烯的氧化去除效率.采用O3/H2O2氧化高浓度苯乙烯有机废气,研究了臭氧投加量、停留时间、H2O2体积分数、循环液喷淋密度和O3/C8H8摩尔比对苯乙烯去除率的影响.结果表明,O3/H2O2气液两相氧化能高效净化苯乙烯有机废气,苯乙烯去除率可达85.7%.适宜运行条件:停留时间为20.6 s,H2O2体积分数为10%,喷淋密度为1.72 m3·(m2·h)-1,O3/C8H8摩尔比为0.46.采用GC-MS分析O3/H2O2气液两相高级氧化苯乙烯出口气样,研究结果表明苯甲醛(C6H5CHO)和苯甲酸(C6H5COOH)为O3/H2O2氧化苯乙烯的中间产物,并推测出苯乙烯的降解机制.     

Influence of reactivation on the electrochemical performances of activated carbon based on coconut shell

Coconut shell-based activated carbon (AC) were prepared by CO₂ activation, and then the ACs with higher mesopore ratio were obtained by steam activation and by impregnating iron catalyst followed by steam activation, respectively. The AC with the highest mesopore ratio (AC_hmr) shows superior capacitive behavior, power output and high-frequency performance in supercapacitors. The results should attribute to the connection of its wide micropores and mesopores larger than 3 nm, which is more favorable for fast ionic transportation. The pore size distribution exhibits that the mesopore ratios of the ACs are significantly increased by reactivation of steam or catalyst up to 75% and 78%, respectively. As evidenced by cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic measurements, the AC_hmr shows superior capacitive behaviors, conductivity and performance of electrolytic ionic transportation. The response current densities are evidently enhanced through the cyclic voltammery test at 50 mV/sec scan rate. The electrochemical impedance spectroscopy demonstrates that the conductivity and ion transport performance of the ACs are improved. The specific capacitances of the ACs were increased from 140 to 240 F/g at 500 mA/g current density. The AC_hmr can provide much higher power density while still maintaining good energy density, and demonstrate excellent high-frequency performances. The pore structure and conductivity of the AC_hmr also improve the cycleability and self-discharge of supercapacitors. Such AC_hmr exhibits a great potential in supercapacitors, particularly for applications where high power output and good high-frequency capacitive performances are required.     

Influence of reactivation on the electrochemical performances of activated carbon based on coconut shell

Coconut shell-based activated carbon (AC) were prepared by CO₂ activation, and then the ACs with higher mesopore ratio were obtained by steam activation and by impregnating iron catalyst followed by steam activation, respectively. The AC with the highest mesopore ratio (AC_hmr) shows superior capacitive behavior, power output and high-frequency performance in supercapacitors. The results should attribute to the connection of its wide micropores and mesopores larger than 3 nm, which is more favorable for fast ionic transportation. The pore size distribution exhibits that the mesopore ratios of the ACs are significantly increased by reactivation of steam or catalyst up to 75% and 78%, respectively. As evidenced by cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic measurements, the AC_hmr shows superior capacitive behaviors, conductivity and performance of electrolytic ionic transportation. The response current densities are evidently enhanced through the cyclic voltammery test at 50 mV/sec scan rate. The electrochemical impedance spectroscopy demonstrates that the conductivity and ion transport performance of the ACs are improved. The specific capacitances of the ACs were increased from 140 to 240 F/g at 500 mA/g current density. The AC_hmr can provide much higher power density while still maintaining good energy density, and demonstrate excellent high-frequency performances. The pore structure and conductivity of the AC_hmr also improve the cycleability and self-discharge of supercapacitors. Such AC_hmr exhibits a great potential in supercapacitors, particularly for applications where high power output and good high-frequency capacitive performances are required.