Kenya seeks to eliminate plastic packaging,an environmental scourge on a national and even continental scaleJOHN Onyango lives in Nairobi,Kenya＇s capital.As he comes out of a downtown supermarket on an afternoon in O...Kenya seeks to eliminate plastic packaging,an environmental scourge on a national and even continental scaleJOHN Onyango lives in Nairobi,Kenya＇s capital.As he comes out of a downtown supermarket on an afternoon in October,the 61-year-old mechanic is carrying fruit in a recyclable cloth bag.展开更多
The weldabiUty of some material is analyzed with simple calculating program in this paper, and weldability testing data are shared through database system. The welding procedures are designed with help of expert syste...The weldabiUty of some material is analyzed with simple calculating program in this paper, and weldability testing data are shared through database system. The welding procedures are designed with help of expert systems, and the knowledge is shared among welding engineers. Not only the preparing progress of the welding documents is completed with database systems but also the complex decision on the necessity of the qualification test according to the present procedure qualification records （PQRs） and manufacture codes is made. Moreover, the artificial neural network （ANN） technique is proven to be one of the effective ways to predict mechanical properties of welded joints when there are enough tested data to train the models. Finally, the achievements in modeling microstructure of welded joints are introduced, especially in solid transformation and grain growth in both heat-affected zone （HAZ） and welded molten pool.展开更多
文摘Kenya seeks to eliminate plastic packaging,an environmental scourge on a national and even continental scaleJOHN Onyango lives in Nairobi,Kenya＇s capital.As he comes out of a downtown supermarket on an afternoon in October,the 61-year-old mechanic is carrying fruit in a recyclable cloth bag.
基金Acknowledgements Financial support by the National Natural Science Foundation of China under Grant No. 50775112 is gratefully acknowledged.
文摘The weldabiUty of some material is analyzed with simple calculating program in this paper, and weldability testing data are shared through database system. The welding procedures are designed with help of expert systems, and the knowledge is shared among welding engineers. Not only the preparing progress of the welding documents is completed with database systems but also the complex decision on the necessity of the qualification test according to the present procedure qualification records （PQRs） and manufacture codes is made. Moreover, the artificial neural network （ANN） technique is proven to be one of the effective ways to predict mechanical properties of welded joints when there are enough tested data to train the models. Finally, the achievements in modeling microstructure of welded joints are introduced, especially in solid transformation and grain growth in both heat-affected zone （HAZ） and welded molten pool.
