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Simulate oil spill weathering with system dynamic model

Aihaiti KASIMU, Junran DONG, Yuan BIAN, Desheng WU

《工程管理前沿（英文）》页码 696-696 doi: 10.1007/s42524-019-0060-1

摘要： Numerous oil spill fate and trajectory models have been recently developed to predict oil spill weathering processes. However, these models separately predicted the fate of spilled oil and the change in oil properties. A system dynamic model is thus developed based on the most significant oil weathering processes, which include spreading, evaporation, dispersion into the water bulk, emulsification, and changes in viscosity and density. We employ differential equations to describe these main oil weathering processes, which vary and have different effects on each other. Oil density and viscosity are functions of evaporation and emulsification and change over time. Oil evaporation is the most important process and removes most of the spilled oil from sea surface. Considering the main oil weathering processes, our model provides a different method of predicting the fate of oil and changes in oil properties. The Alaska North Slope is selected as a case study, and the estimated fractions of evaporation are 19% and 16% at 273 K and 283 K, respectively, within 240 h. Simulation results of oil properties and fates are also presented in this study.

关键词： oil spill weathering modeling system dynamics

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wood dust type on mechanical properties, wear behavior, biodegradability, and resistance to natural weathering

Sawan KUMAR, Ajitanshu VEDRTNAM, S. J. PAWAR

《结构与土木工程前沿（英文）》 2019年第13卷第6期页码 1446-1462 doi: 10.1007/s11709-019-0568-9

摘要： The present work reports the inclusion of different proportions of Mango/Sheesham/Mahogany/Babool dust to polypropylene for improving mechanical, wear behavior and biodegradability of wood-plastic composite (WPC). The wood dust (10%, 15%, 20% by weight) was mixed with polypropylene granules and WPCs were prepared using an injection molding technique. The mechanical, wear, and morphological characterizations of fabricated WPCs were carried out using standard ASTM methods, pin on disk apparatus, and scanning electron microscopy (SEM), respectively. Further, the biodegradability and resistance to natural weathering of WPCs were evaluated following ASTM D5338-11 and ASTM D1435-99, respectively. The WPCs consisting of Babool and Sheesham dust were having superior mechanical properties whereas the WPCs consisting of Mango and Mahogany were more wear resistant. It was found that increasing wood powder proportion results in higher Young’s modulus, lesser wear rate, and decreased stress at break. The WPCs made of Sheesham dust were least biodegradable. It was noticed that the biodegradability corresponds with resistance to natural weathering; more biodegradable WPCs were having the lesser resistance to natural weathering.

关键词： wood-plastic composites mechanical testing wear biodegradability injection molding weathering

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Retraction Note to: Simulate oil spill weathering with system dynamic model

Aihaiti Kasimu, Junran Dong, Yuan Bian, Desheng WU

《工程管理前沿（英文）》页码 695-695 doi: 10.1007/s42524-020-0120-6

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wood dust type on mechanical properties, wear behavior, biodegradability, and resistance to natural weathering

《结构与土木工程前沿（英文）》 2021年第15卷第4期页码 1071-1071 doi: 10.1007/s11709-021-0736-6

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Quantitative analysis of microplastics in coastal tidal-flat reclamation in Dongtai, China

《环境科学与工程前沿（英文）》 2022年第16卷第8期 doi: 10.1007/s11783-022-1528-5

摘要：

• Reclamation projects are important disturbances on microplastic risk in coasts.

关键词： Coastal reclamation Engineering geotextiles Soil microplastics Weathering simulation Marine emission

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微合金钢回顾与展望

王仪康

《中国工程科学》 2000年第2卷第2期页码 77-82

摘要：

近几年来，包括我国在内的全球主要国家对钢材需用量同其国民经济产值有明显对应关系，钢材重新被确认为材料支柱。原因是经过高技术改造，钢铁工业发生了根本变化，推出了很多性能优越的“高技术钢材”，促进了相关工业的发展。微合金钢就是这些“高技术钢材”中用量最大的一种。在过去十年，我国针对大型露天矿重型设备、高压输送管线和制造运输集装箱需要发展微合金钢的经验表明，它是在高技术条件下生产的高经济效益钢材。展望21世纪，微合金钢由于有利于环境保护又有技术发展深度，在我国高压输气管线、造船和建筑钢结构方面还会有进一步发展。应列为创新项目，重点扶植、注意跟踪、及时开发，以带动钢铁工业技术改造。

关键词：微合金钢控制轧制管线钢板耐候钢板 SUF钢板环境保护材料