本文研究大学英语课程中实施课程思政的具体路径。首先分析当前英语教学课程思政有机融合现状,指出存在问题包括价值观塑造注重程度低、课程思政元素盲目增补以及教学设计中思政教育不够充分。基于布鲁姆教学目标分类法、产出导向法和...本文研究大学英语课程中实施课程思政的具体路径。首先分析当前英语教学课程思政有机融合现状,指出存在问题包括价值观塑造注重程度低、课程思政元素盲目增补以及教学设计中思政教育不够充分。基于布鲁姆教学目标分类法、产出导向法和混合式学习理论,以《综合教程4》(第3版)中A French Fourth教学实践为例,详细阐述如何设定高阶性教学目标、创新教学方法和评价形式,强调英语教学和课程思政的有机融合,为外语课程思政提供有价值的实践案例。展开更多
Oil depots along products pipelines are important components of the pipeline transportation system and down-stream markets.The operating costs of oil depots account for a large proportion of the total system’s operat...Oil depots along products pipelines are important components of the pipeline transportation system and down-stream markets.The operating costs of oil depots account for a large proportion of the total system’s operating costs.Meanwhile,oil depots and pipelines form an entire system,and each operation in a single oil depot may have influence on others.It is a tough job to make a scheduling plan when considering the factors of delivering contaminated oil and batches migration.So far,studies simultaneously considering operating constraints and contaminated oil issues are rare.Aiming at making a scheduling plan with the lowest operating costs,the paper establishes a mixed-integer linear programming model,considering a sequence of operations,such as delivery, export, blending,fractionating and exchanging operations,and batch property differences of the same oil as well as influence of batch migration on contaminated volume.Moreover,the paper verifies the linear relationship between oil concentration and blending capability by mathematical deduction.Finally,the model is successfully applied to one of the product pipelines in China and proved to be practical.展开更多
Blending contributes to create an opportunity to achieve the target feed material and helps optimize the run of mine(ROM)material.In addition,it allows mixing different materials and achieving a wide range of quality....Blending contributes to create an opportunity to achieve the target feed material and helps optimize the run of mine(ROM)material.In addition,it allows mixing different materials and achieving a wide range of quality.Then,multiple destinations can be considered for ROM.The present study seeks to develop a Mixed Integer Programming(MIP)model for the production scheduling of an iron ore mine.Based on this model,different destinations are considered for mine products with different specifications.To this aim,ten scenarios were considered with a number of different destinations.The results indicated that the maximum NPV in the multiple product scenarios is about 15%more than that of the single product scenarios.Further,30 realizations were used to evaluate the effect of grade and tonnage uncertainty.The reliability of the production plan was approximately 61.07%and 62.81%in the first and second period of exploitation,respectively.展开更多
The fiber properties of modacrylic fibers with silk protein and spinning technology for blended knitting yarns are studied. By testing the fiber properties, fiber spinnability is analysed. Modacrylic fibers with silk ...The fiber properties of modacrylic fibers with silk protein and spinning technology for blended knitting yarns are studied. By testing the fiber properties, fiber spinnability is analysed. Modacrylic fibers with silk protein are brittle and have poor cohesion, so the key to process modacrylic fibers with silk protein lies in forming lap and sliver. During opening and carding, low speed is used to decrease fiber damage and the proper static resistant oil is applied to eliminate lapping fibers. Besides, the temperature and relative humidity have to be strictly controlled. The applications of modacrylic fibers with silk protein are also put forward.展开更多
At petroleum refining facilities with a long operational history, it is likely that some products were released to the subsurface and migrated to the water table. At or near the water table, these products might have ...At petroleum refining facilities with a long operational history, it is likely that some products were released to the subsurface and migrated to the water table. At or near the water table, these products might have commingled with a pre-existing light non-aqueous phase liquid (LNAPL) plume(s). Depending on the types of products involved and site hydrodynamics, commingling might result in the formation of a “new” LNAPL that exhibits similar characteristics to products that were manufactured via intentional blending by refinery operations. This study presents a case in which subsurface commingling of two intermediate gasoline-range products occurred at a petroleum refinery. The commingled “new” product appears almost identical to finished gasoline. As the intermediate stream products are typically sourced from refinery and finished products from either refinery or other sources (e.g., pipeline corridors), distinction of the commingled gasoline intermediate stream product from finished gasoline becomes critical not only for resolving liability issues, but also development of a remedial strategy. In this study, the source relationship between the gasoline-range intermediate stream product and finished gasoline was resolved using multiple lines of evidence including a gasoline additive, LNAPL chromatograms, diagnostic compounds (biomarkers) and ratios, and site LNAPL hydrodynamics.展开更多
文摘本文研究大学英语课程中实施课程思政的具体路径。首先分析当前英语教学课程思政有机融合现状,指出存在问题包括价值观塑造注重程度低、课程思政元素盲目增补以及教学设计中思政教育不够充分。基于布鲁姆教学目标分类法、产出导向法和混合式学习理论,以《综合教程4》(第3版)中A French Fourth教学实践为例,详细阐述如何设定高阶性教学目标、创新教学方法和评价形式,强调英语教学和课程思政的有机融合,为外语课程思政提供有价值的实践案例。
基金part of the Program of ‘‘Study of the mechanism of complex heat and mass transfer during batch transport process in product pipelines’’ funded under the National Natural Science Foundation of China, Grant Number 51474228
文摘Oil depots along products pipelines are important components of the pipeline transportation system and down-stream markets.The operating costs of oil depots account for a large proportion of the total system’s operating costs.Meanwhile,oil depots and pipelines form an entire system,and each operation in a single oil depot may have influence on others.It is a tough job to make a scheduling plan when considering the factors of delivering contaminated oil and batches migration.So far,studies simultaneously considering operating constraints and contaminated oil issues are rare.Aiming at making a scheduling plan with the lowest operating costs,the paper establishes a mixed-integer linear programming model,considering a sequence of operations,such as delivery, export, blending,fractionating and exchanging operations,and batch property differences of the same oil as well as influence of batch migration on contaminated volume.Moreover,the paper verifies the linear relationship between oil concentration and blending capability by mathematical deduction.Finally,the model is successfully applied to one of the product pipelines in China and proved to be practical.
文摘Blending contributes to create an opportunity to achieve the target feed material and helps optimize the run of mine(ROM)material.In addition,it allows mixing different materials and achieving a wide range of quality.Then,multiple destinations can be considered for ROM.The present study seeks to develop a Mixed Integer Programming(MIP)model for the production scheduling of an iron ore mine.Based on this model,different destinations are considered for mine products with different specifications.To this aim,ten scenarios were considered with a number of different destinations.The results indicated that the maximum NPV in the multiple product scenarios is about 15%more than that of the single product scenarios.Further,30 realizations were used to evaluate the effect of grade and tonnage uncertainty.The reliability of the production plan was approximately 61.07%and 62.81%in the first and second period of exploitation,respectively.
文摘The fiber properties of modacrylic fibers with silk protein and spinning technology for blended knitting yarns are studied. By testing the fiber properties, fiber spinnability is analysed. Modacrylic fibers with silk protein are brittle and have poor cohesion, so the key to process modacrylic fibers with silk protein lies in forming lap and sliver. During opening and carding, low speed is used to decrease fiber damage and the proper static resistant oil is applied to eliminate lapping fibers. Besides, the temperature and relative humidity have to be strictly controlled. The applications of modacrylic fibers with silk protein are also put forward.
文摘At petroleum refining facilities with a long operational history, it is likely that some products were released to the subsurface and migrated to the water table. At or near the water table, these products might have commingled with a pre-existing light non-aqueous phase liquid (LNAPL) plume(s). Depending on the types of products involved and site hydrodynamics, commingling might result in the formation of a “new” LNAPL that exhibits similar characteristics to products that were manufactured via intentional blending by refinery operations. This study presents a case in which subsurface commingling of two intermediate gasoline-range products occurred at a petroleum refinery. The commingled “new” product appears almost identical to finished gasoline. As the intermediate stream products are typically sourced from refinery and finished products from either refinery or other sources (e.g., pipeline corridors), distinction of the commingled gasoline intermediate stream product from finished gasoline becomes critical not only for resolving liability issues, but also development of a remedial strategy. In this study, the source relationship between the gasoline-range intermediate stream product and finished gasoline was resolved using multiple lines of evidence including a gasoline additive, LNAPL chromatograms, diagnostic compounds (biomarkers) and ratios, and site LNAPL hydrodynamics.
