This paper investigates the hydrodynamic characteristics of floating truncated cylinders undergoing horizontal and vertical motions due to earthquake excitations in the finite water depth.The governing equation of the...This paper investigates the hydrodynamic characteristics of floating truncated cylinders undergoing horizontal and vertical motions due to earthquake excitations in the finite water depth.The governing equation of the hydrodynamic pressure acting on the cylinder is derived based on the radiation theory with the inviscid and incompressible assumptions.The governing equation is solved by using the method of separating variables and analytical solutions are obtained by assigning reasonable boundary conditions.The analytical result is validated by a numerical model using the exact artificial boundary simulation of the infinite water.The main variation and distribution characteristics of the hydrodynamic pressure acting on the side and bottom of the cylinder are analyzed for different combinations of wide-height and immersion ratios.The added mass coefficient of the cylinder is calculated by integrating the hydrodynamic pressure and simplified formulas are proposed for engineering applications.The calculation results show that the simplified formulas are in good agreement with the analytical solutions.展开更多
The objective of this research was to determine the mechanical parameter from EVA foam and also investigate its behavior by using Blatz-Ko,Neo-Hookean,Mooney model and experimental test.The physical characteristic of ...The objective of this research was to determine the mechanical parameter from EVA foam and also investigate its behavior by using Blatz-Ko,Neo-Hookean,Mooney model and experimental test.The physical characteristic of EVA foam was also evaluated by scanning electron microscopy(SEM).The results show that Blatz-Ko and Neo-Hookean model can fit the curve at 5%and 8%strain,respectively.The Mooney model can fit the curve at 50%strain.The modulus of rigidity evaluated from Mooney model is 0.0814±0.0027 MPa.The structure of EVA foam from SEM image shows that EVA structure is a closed cell with homogeneous porous structure.From the result,it is found that Mooney model can adjust the data better than other models.This model can be applied for mechanical response prediction of EVA foam and also for reference value in engineering application.展开更多
在双碳目标背景下,高污染企业正在实施绿色转型,这些企业的业绩考核受到了高度关注。文章以钢铁行业龙头X企业为例,采用该企业2017—2021年的环保数据与财务数据,计算并对比其经济附加值(Economic Value Added,EVA)指标与绿色EVA指标,...在双碳目标背景下,高污染企业正在实施绿色转型,这些企业的业绩考核受到了高度关注。文章以钢铁行业龙头X企业为例,采用该企业2017—2021年的环保数据与财务数据,计算并对比其经济附加值(Economic Value Added,EVA)指标与绿色EVA指标,探讨环保因素的引入对企业业绩考核的影响。研究结果表明:①X企业绿色EVA指标相较于EVA指标在企业业绩考核上有很大的提升,区别于EVA指标中仅考虑财务因素,绿色EVA指标在EVA指标的基础上加入了环保因素,对于正处于绿色转型阶段的企业起到了正向激励的作用,为企业的绿色转型增加了动力;②2017—2021年5年间,企业的绿色EVA指标均为正值,表明环保因素的引入对于企业业绩考核具有真实可靠的提升作用,绿色EVA指标能够更客观地反映企业实际业绩,激励企业绿色转型,促进企业健康发展。展开更多
全面预算管理是企业经营管理工作中的主要工具,通过将企业资源进行全方位配置,达到优化企业管理效益、改进工作流程的目标。本文对企业实行全面预算管理工作中存在的问题进行了分析,探讨将 EVA理念应用到全面预算管理工作中,以此解决传...全面预算管理是企业经营管理工作中的主要工具,通过将企业资源进行全方位配置,达到优化企业管理效益、改进工作流程的目标。本文对企业实行全面预算管理工作中存在的问题进行了分析,探讨将 EVA理念应用到全面预算管理工作中,以此解决传统预算管理工作中所存在的各类问题,优化预算管理,在此基础上构建 EVA 导向下的全面预算管理体系,期望对企业实施更科学的预算管理具有一定的参考价值。展开更多
基金financially supported by the National Natural Science Foundation of China(Grant Nos.52078010 and 52101321)the National Key Research and Development Program of China(Grant No.2022YFC3004300).
文摘This paper investigates the hydrodynamic characteristics of floating truncated cylinders undergoing horizontal and vertical motions due to earthquake excitations in the finite water depth.The governing equation of the hydrodynamic pressure acting on the cylinder is derived based on the radiation theory with the inviscid and incompressible assumptions.The governing equation is solved by using the method of separating variables and analytical solutions are obtained by assigning reasonable boundary conditions.The analytical result is validated by a numerical model using the exact artificial boundary simulation of the infinite water.The main variation and distribution characteristics of the hydrodynamic pressure acting on the side and bottom of the cylinder are analyzed for different combinations of wide-height and immersion ratios.The added mass coefficient of the cylinder is calculated by integrating the hydrodynamic pressure and simplified formulas are proposed for engineering applications.The calculation results show that the simplified formulas are in good agreement with the analytical solutions.
基金supported by grants funded by Department of Mechanical Engineering,Faculty of Engineering,Chiang Mai University and the Graduate School of Chiang Mai University.
文摘The objective of this research was to determine the mechanical parameter from EVA foam and also investigate its behavior by using Blatz-Ko,Neo-Hookean,Mooney model and experimental test.The physical characteristic of EVA foam was also evaluated by scanning electron microscopy(SEM).The results show that Blatz-Ko and Neo-Hookean model can fit the curve at 5%and 8%strain,respectively.The Mooney model can fit the curve at 50%strain.The modulus of rigidity evaluated from Mooney model is 0.0814±0.0027 MPa.The structure of EVA foam from SEM image shows that EVA structure is a closed cell with homogeneous porous structure.From the result,it is found that Mooney model can adjust the data better than other models.This model can be applied for mechanical response prediction of EVA foam and also for reference value in engineering application.
文摘在双碳目标背景下,高污染企业正在实施绿色转型,这些企业的业绩考核受到了高度关注。文章以钢铁行业龙头X企业为例,采用该企业2017—2021年的环保数据与财务数据,计算并对比其经济附加值(Economic Value Added,EVA)指标与绿色EVA指标,探讨环保因素的引入对企业业绩考核的影响。研究结果表明:①X企业绿色EVA指标相较于EVA指标在企业业绩考核上有很大的提升,区别于EVA指标中仅考虑财务因素,绿色EVA指标在EVA指标的基础上加入了环保因素,对于正处于绿色转型阶段的企业起到了正向激励的作用,为企业的绿色转型增加了动力;②2017—2021年5年间,企业的绿色EVA指标均为正值,表明环保因素的引入对于企业业绩考核具有真实可靠的提升作用,绿色EVA指标能够更客观地反映企业实际业绩,激励企业绿色转型,促进企业健康发展。
文摘全面预算管理是企业经营管理工作中的主要工具,通过将企业资源进行全方位配置,达到优化企业管理效益、改进工作流程的目标。本文对企业实行全面预算管理工作中存在的问题进行了分析,探讨将 EVA理念应用到全面预算管理工作中,以此解决传统预算管理工作中所存在的各类问题,优化预算管理,在此基础上构建 EVA 导向下的全面预算管理体系,期望对企业实施更科学的预算管理具有一定的参考价值。
