In 2015,the Chinese government has put forward the development strategy of"made in China 2025"with Chinese characteristics,adhering to the basic policy of"innovation driven,quality first,green developme...In 2015,the Chinese government has put forward the development strategy of"made in China 2025"with Chinese characteristics,adhering to the basic policy of"innovation driven,quality first,green development,structural optimization and talent oriented",and the basic principle of"guided by the market and the government,based on the current and long-term,overall promotion and key breakthrough,independent development and open cooperation".Under the background,for the curriculum characteristics of the Packing Design,the"packaging task-based"teaching model is introduced,and the research and practice of curriculum reform are carried out from three aspects:curriculum content arrangement,curriculum design training and graduation design training,thereby cultivating students'practical ability and innovative spirit,letting students learn to study independently and practice actively,enhancing students'packaging practice ability and employment competitiveness,and training more and more excellent product packaging design talents for"made in China 2025".展开更多
Research situation of eco-design is analyzed, and then thoughts and methods of eco-design are discused. The eco-design includes packaging modularization, dematerialization, energy-saving and bio-simulation.
Traditionally the majority of fractionation columns in natural gas processing plants were equipped with trays.However an option to trayed columns is to use packing.Packed columns offer a larger surface area per unit v...Traditionally the majority of fractionation columns in natural gas processing plants were equipped with trays.However an option to trayed columns is to use packing.Packed columns offer a larger surface area per unit volume for mass transfer and the continuous gas to liquid contact throughout the column rather than at specific levels （such as in tray columns）.For process design purposes,it is essential to estimate the pressure drop for enabling the proper operation of packed columns.In this study,a simple generalized pressure drop correlation （GPDC） which is easier than existing approaches requiring more complicated and longer computations is developed for sizing randomly packed fractionation columns for pressure drops up to 150 mm water per meter of packing.This correlation can be used to estimate pressure drop for a given loading and column diameter.Alternatively,for a given pressure drop the diameter can be determined.The predictions from the proposed correlation have been compared with reported data and found good agreement with average absolute deviation hovering around 4.9%.The proposed predictive tool is superior owing to its accuracy and clear numerical background,wherein the relevant coefficients can be retuned quickly if new and more accurate data are available in the future.This proposed simple-to-use approach can be of immense practical value for the engineers and scientists to have a quick check on the pressure drop in packed columns for a given loading and column diameter.In particular,gas engineers would find the proposed approach can be used very friendly involving no complex expressions with transparent and easy-to-handle calculation steps.展开更多
This article describes the pack & unpack performance of the vector using YH-1 supercomputer as its platform, with its emphasis on the pack & unpack technique's unique application to vector computation, in ...This article describes the pack & unpack performance of the vector using YH-1 supercomputer as its platform, with its emphasis on the pack & unpack technique's unique application to vector computation, in the light of vector computer's characteristics and some practical cases. The practical numerical experiment proves that the pack & unpack techniques is a key method to the depth parallel development and vectorization research of large scale scientific computation project, and which is a highly effective method to vectorizing application programs.展开更多
基金Supported by the"13 th five-year"Planning Topics of Guangxi Educational Science(2017B086).
文摘In 2015,the Chinese government has put forward the development strategy of"made in China 2025"with Chinese characteristics,adhering to the basic policy of"innovation driven,quality first,green development,structural optimization and talent oriented",and the basic principle of"guided by the market and the government,based on the current and long-term,overall promotion and key breakthrough,independent development and open cooperation".Under the background,for the curriculum characteristics of the Packing Design,the"packaging task-based"teaching model is introduced,and the research and practice of curriculum reform are carried out from three aspects:curriculum content arrangement,curriculum design training and graduation design training,thereby cultivating students'practical ability and innovative spirit,letting students learn to study independently and practice actively,enhancing students'packaging practice ability and employment competitiveness,and training more and more excellent product packaging design talents for"made in China 2025".
基金Supported by Jiangsu Province Scientific Innovation Research of College Graduate
文摘Research situation of eco-design is analyzed, and then thoughts and methods of eco-design are discused. The eco-design includes packaging modularization, dematerialization, energy-saving and bio-simulation.
文摘Traditionally the majority of fractionation columns in natural gas processing plants were equipped with trays.However an option to trayed columns is to use packing.Packed columns offer a larger surface area per unit volume for mass transfer and the continuous gas to liquid contact throughout the column rather than at specific levels （such as in tray columns）.For process design purposes,it is essential to estimate the pressure drop for enabling the proper operation of packed columns.In this study,a simple generalized pressure drop correlation （GPDC） which is easier than existing approaches requiring more complicated and longer computations is developed for sizing randomly packed fractionation columns for pressure drops up to 150 mm water per meter of packing.This correlation can be used to estimate pressure drop for a given loading and column diameter.Alternatively,for a given pressure drop the diameter can be determined.The predictions from the proposed correlation have been compared with reported data and found good agreement with average absolute deviation hovering around 4.9%.The proposed predictive tool is superior owing to its accuracy and clear numerical background,wherein the relevant coefficients can be retuned quickly if new and more accurate data are available in the future.This proposed simple-to-use approach can be of immense practical value for the engineers and scientists to have a quick check on the pressure drop in packed columns for a given loading and column diameter.In particular,gas engineers would find the proposed approach can be used very friendly involving no complex expressions with transparent and easy-to-handle calculation steps.
文摘This article describes the pack & unpack performance of the vector using YH-1 supercomputer as its platform, with its emphasis on the pack & unpack technique's unique application to vector computation, in the light of vector computer's characteristics and some practical cases. The practical numerical experiment proves that the pack & unpack techniques is a key method to the depth parallel development and vectorization research of large scale scientific computation project, and which is a highly effective method to vectorizing application programs.
