The paper develops a view on the history and future of working capital programs and focuses on the state of the art in four remarkable years： 1900, 1930, 1960, and 1990. In these years, an operations approach, an acc...The paper develops a view on the history and future of working capital programs and focuses on the state of the art in four remarkable years： 1900, 1930, 1960, and 1990. In these years, an operations approach, an accounting approach, an economic approach, and a capital market approach, respectively, were prevalent. The paper shows that all of the approaches have their merits for today＇s working capital management （WCM） programs and discusses useful working capital program indicators, taking into account the cash conversion cycle （CCC） and its delineation into accounts receivables （A/R）, inventory, and accounts payables （A/P） periods. This enables the author to take step ahead to the magic year 2020. Finally, the paper discusses briefly an academic development agenda.展开更多
The crack behavior of LDX 2101 by hot compression tests in the temperature range of 950 to 1150 ℃ and strain rate range of 0.01 to 30 s-1 was studied.The hot workability map of LDX 2101 was constructed and the alloy ...The crack behavior of LDX 2101 by hot compression tests in the temperature range of 950 to 1150 ℃ and strain rate range of 0.01 to 30 s-1 was studied.The hot workability map of LDX 2101 was constructed and the alloy exhibited a better crack resistance at higher temperature and lower strain rate.Microvoids initiated and coalesced into crack at subsurface on the equatorial plane of bulge surface under secondary tensile condition.The cracks were orientated at an angle of approximately 45° with respect to the compression axis due to the secondary tensile stress.Microcracks easily initiated on the interface of ferrite and austenite and propagated within ferrite.The predicted results using specific plastic work approach were matched well with the free surface cracks.展开更多
文摘The paper develops a view on the history and future of working capital programs and focuses on the state of the art in four remarkable years： 1900, 1930, 1960, and 1990. In these years, an operations approach, an accounting approach, an economic approach, and a capital market approach, respectively, were prevalent. The paper shows that all of the approaches have their merits for today＇s working capital management （WCM） programs and discusses useful working capital program indicators, taking into account the cash conversion cycle （CCC） and its delineation into accounts receivables （A/R）, inventory, and accounts payables （A/P） periods. This enables the author to take step ahead to the magic year 2020. Finally, the paper discusses briefly an academic development agenda.
基金Item Sponsored by National Natrural Science Foundation of China(50734002)
文摘The crack behavior of LDX 2101 by hot compression tests in the temperature range of 950 to 1150 ℃ and strain rate range of 0.01 to 30 s-1 was studied.The hot workability map of LDX 2101 was constructed and the alloy exhibited a better crack resistance at higher temperature and lower strain rate.Microvoids initiated and coalesced into crack at subsurface on the equatorial plane of bulge surface under secondary tensile condition.The cracks were orientated at an angle of approximately 45° with respect to the compression axis due to the secondary tensile stress.Microcracks easily initiated on the interface of ferrite and austenite and propagated within ferrite.The predicted results using specific plastic work approach were matched well with the free surface cracks.
