The procedure of assessment of structural fatigue strength of an offshore floating production and storage and offloading unit (FPSO) in this paper. The emphasis is placed on the long-term prediction of wave induced lo...The procedure of assessment of structural fatigue strength of an offshore floating production and storage and offloading unit (FPSO) in this paper. The emphasis is placed on the long-term prediction of wave induced loading, the refined finite element model for hot spot stress calculation, the combination of stress components, and fatigue damage assessment based on S-N curve.展开更多
In view of the existing situation of gas field development, one kind of method to evaluate the production performance of gas production units (GPUs) was presented in this paper. Among the commonly used indicators of g...In view of the existing situation of gas field development, one kind of method to evaluate the production performance of gas production units (GPUs) was presented in this paper. Among the commonly used indicators of gas field development, we select 11 indicators from the three aspects of production task, gas reservoir management, and production technology. According to the principle of analytic network process (ANP), this paper introduced one kind of new method to get the weights of indicators. By means of the method of TOPSIS, it is easy to obtain the rankings for all the GPUs through calculating the weighted Euclidean distance between each GPU and the positive or negative ideal point. This evaluation method could constantly improve the management level of gas production units and deepen the delicacy management of gas field development.展开更多
Ruby—the country’s first seriescosmetics The Ruby Beauty Parlor andCosmetics School is the first of its kind inChina. The skin-care and make-upmethods it has applied are still popular.Among the gifts presented to qu...Ruby—the country’s first seriescosmetics The Ruby Beauty Parlor andCosmetics School is the first of its kind inChina. The skin-care and make-upmethods it has applied are still popular.Among the gifts presented to queenElizabeth Ⅱ of Britain, British PrimeMinister Mrs. Thatcher and RussianPresident Gorbachev by the Chinesegovernment, there was Ruby. According to market surveys andthe conclusions of beauty culture, workingwomen in modern society with their fastrhythm of life and exquisite tastes arefastidious in selecting cosmetics. To meettheir special needs, Ruby’s white展开更多
The aims of this study were to investigate the food safety knowledge and practices of food handlers and to assess the sanitary conditions of attieke production units in the South of C?te d’Ivoire. A cross-sectional s...The aims of this study were to investigate the food safety knowledge and practices of food handlers and to assess the sanitary conditions of attieke production units in the South of C?te d’Ivoire. A cross-sectional study was conducted during 4 months in 2012 in 7 localities and data were collected using questionnaire and observation checklist and microbiological analysis of hands. A total of 775 attieke production units were involved in this survey. Seventy-one percent (71%) were located on public domains and only 70 production units (9%) used septic tank as a mean of final deposal for liquid waste. Hygiene conditions and practices of food handlers in attieke production units were inadequate. The presence of specific microorganisms such as Staphylococcus aureus, Klebsiella pneumoniae, Enterobacter agglomerans, Citrobacter youngae, Klebsiella oxytoca and Citrobacter freundi was indicative of a degree of ignorance on the part of food handlers towards proper hygienic practices.展开更多
基于电转氨(power to ammonia,P2A)的综合能源生产单元(integrated energy production unit,IEPU)通过耦合绿电制氢和哈伯反应合成氨工艺,为农业、工业和制造业等行业提供绿氨,对促进可再生能源消纳及氢能储运等行业发展具有重要的意义...基于电转氨(power to ammonia,P2A)的综合能源生产单元(integrated energy production unit,IEPU)通过耦合绿电制氢和哈伯反应合成氨工艺,为农业、工业和制造业等行业提供绿氨,对促进可再生能源消纳及氢能储运等行业发展具有重要的意义。为定量评价IEPU的能效、技术经济性和降碳潜力,该文基于Aspen Plus建立碱性电解水制氢、合成氨及换热网络等关键过程模型,对IEPU进行系统仿真,定量评价各设备全流程之间的能量流、(火用)流、碳足迹及绿氨的平准化成本。热经济性能效评估表明,IEPU系统的设计工况整体能量效率为39.47%,(火用)效率为26.51%。技术经济性评估表明,当可再生能源电价为0.204元/(kW·h),年利用小时数达到6000时,IEPU系统的绿氨成本约为传统煤制氨生产工艺的1.5倍。基于全生命周期碳足迹评价的结果表明,水、核、风和光伏4种能源驱动的IEPU系统碳足迹在0.20~2.39 kg CO_(2.eq)/kg NH3间波动。结果可用于指导氨基IEPU的规划与设计。展开更多
文摘The procedure of assessment of structural fatigue strength of an offshore floating production and storage and offloading unit (FPSO) in this paper. The emphasis is placed on the long-term prediction of wave induced loading, the refined finite element model for hot spot stress calculation, the combination of stress components, and fatigue damage assessment based on S-N curve.
文摘In view of the existing situation of gas field development, one kind of method to evaluate the production performance of gas production units (GPUs) was presented in this paper. Among the commonly used indicators of gas field development, we select 11 indicators from the three aspects of production task, gas reservoir management, and production technology. According to the principle of analytic network process (ANP), this paper introduced one kind of new method to get the weights of indicators. By means of the method of TOPSIS, it is easy to obtain the rankings for all the GPUs through calculating the weighted Euclidean distance between each GPU and the positive or negative ideal point. This evaluation method could constantly improve the management level of gas production units and deepen the delicacy management of gas field development.
文摘Ruby—the country’s first seriescosmetics The Ruby Beauty Parlor andCosmetics School is the first of its kind inChina. The skin-care and make-upmethods it has applied are still popular.Among the gifts presented to queenElizabeth Ⅱ of Britain, British PrimeMinister Mrs. Thatcher and RussianPresident Gorbachev by the Chinesegovernment, there was Ruby. According to market surveys andthe conclusions of beauty culture, workingwomen in modern society with their fastrhythm of life and exquisite tastes arefastidious in selecting cosmetics. To meettheir special needs, Ruby’s white
基金supported by the International Foundation for Science(IFS)under Grant E/4955-1.
文摘The aims of this study were to investigate the food safety knowledge and practices of food handlers and to assess the sanitary conditions of attieke production units in the South of C?te d’Ivoire. A cross-sectional study was conducted during 4 months in 2012 in 7 localities and data were collected using questionnaire and observation checklist and microbiological analysis of hands. A total of 775 attieke production units were involved in this survey. Seventy-one percent (71%) were located on public domains and only 70 production units (9%) used septic tank as a mean of final deposal for liquid waste. Hygiene conditions and practices of food handlers in attieke production units were inadequate. The presence of specific microorganisms such as Staphylococcus aureus, Klebsiella pneumoniae, Enterobacter agglomerans, Citrobacter youngae, Klebsiella oxytoca and Citrobacter freundi was indicative of a degree of ignorance on the part of food handlers towards proper hygienic practices.
文摘基于电转氨(power to ammonia,P2A)的综合能源生产单元(integrated energy production unit,IEPU)通过耦合绿电制氢和哈伯反应合成氨工艺,为农业、工业和制造业等行业提供绿氨,对促进可再生能源消纳及氢能储运等行业发展具有重要的意义。为定量评价IEPU的能效、技术经济性和降碳潜力,该文基于Aspen Plus建立碱性电解水制氢、合成氨及换热网络等关键过程模型,对IEPU进行系统仿真,定量评价各设备全流程之间的能量流、(火用)流、碳足迹及绿氨的平准化成本。热经济性能效评估表明,IEPU系统的设计工况整体能量效率为39.47%,(火用)效率为26.51%。技术经济性评估表明,当可再生能源电价为0.204元/(kW·h),年利用小时数达到6000时,IEPU系统的绿氨成本约为传统煤制氨生产工艺的1.5倍。基于全生命周期碳足迹评价的结果表明,水、核、风和光伏4种能源驱动的IEPU系统碳足迹在0.20~2.39 kg CO_(2.eq)/kg NH3间波动。结果可用于指导氨基IEPU的规划与设计。
