People currently pay attention to a hotspot problem that how industrial production is evaluated and controlledbased on sustainable development theory. Quality is one of the important indexes. Two mainstream theories g...People currently pay attention to a hotspot problem that how industrial production is evaluated and controlledbased on sustainable development theory. Quality is one of the important indexes. Two mainstream theories guide us torealize the industrial sustainable development: mainly the circular economy and sustainable manufacturing are introduced.The basic characteristics of the sustainable manufacturing are introduced, and that quality management is importantcontents of sustainable development is indicated. Based on circular economy and sustainable manufacture theories, thedrawbacks in the existing quality management models are analyzed. The requests that satisfy the big system “environ-ment – society – economy” are summarized to build up a model. A Chinese traditional cultural principle is applied andthe relevant contents are sublimated as the platform to set up the model. The new quality management concept models areput forward “T– D– R” three-dimensional structures and “ecological quality loop” model, from which the new qualityconcepts are formed. The paper elaborates the contents and the process of setting up the models. The big quality problemsof the system can be handled by the new quality concept and model that are validated in practice.展开更多
The experimental observations about the complex nonlinear behavior of spontaneous pulsing of dc biased,p-i-n diodes RC circuits are reported.Time intervals series between successive pulses in spike trains were analyze...The experimental observations about the complex nonlinear behavior of spontaneous pulsing of dc biased,p-i-n diodes RC circuits are reported.Time intervals series between successive pulses in spike trains were analyzed.Transitions from quasiperiodicity into chaos via mode-locking were observed.The phase portrait is analyzed to reveal that the system is really characterized by a strange attractor.Finally,the embedding algorithm has applied to determine the fractal dimension of the attractor.展开更多
Microwave irradiation was used to reduce the curing time of carbon fiber/epoxy resin composite material.The properties of carbon fiber/epoxy resin composite material under microwave curing were investigated by thermog...Microwave irradiation was used to reduce the curing time of carbon fiber/epoxy resin composite material.The properties of carbon fiber/epoxy resin composite material under microwave curing were investigated by thermogravimetry(TG),dynamic mechanical analysis(DMA),impact strength test and scanning electron microscope(SEM).The results show that composite materials patch have high thermal stability after microwave curing.The initial degradation temperature is 330.9℃,the maximum thermal decomposition rate is at 368.1℃.When the layer of composite materials patchis 4 layers,the dynamic mechanical properties are the best after microwave curing.The initial storage modulus is 43.2 GPa,increased 28.3 GPa and 27.1 GPa than 3 layers and 5 layers,the glass transition temperature(Tg)is 67.48℃,increased about 12 ℃than 3 layers and 5 layers.Microwave curing can significantly improve the infiltration capacity of epoxy resin,enhance interfacial bonding,and increase the impact strength of composite patch.Under microwave curing,the impact strength of 3,4,5-layers composite material patches increases 35.9%,6.4% and 15.1%,respectively than heating curing.The SEM analysis of impact fracture surface shows that microwave curing can improve the interface of carbon fiber and epoxy resin.展开更多
文摘People currently pay attention to a hotspot problem that how industrial production is evaluated and controlledbased on sustainable development theory. Quality is one of the important indexes. Two mainstream theories guide us torealize the industrial sustainable development: mainly the circular economy and sustainable manufacturing are introduced.The basic characteristics of the sustainable manufacturing are introduced, and that quality management is importantcontents of sustainable development is indicated. Based on circular economy and sustainable manufacture theories, thedrawbacks in the existing quality management models are analyzed. The requests that satisfy the big system “environ-ment – society – economy” are summarized to build up a model. A Chinese traditional cultural principle is applied andthe relevant contents are sublimated as the platform to set up the model. The new quality management concept models areput forward “T– D– R” three-dimensional structures and “ecological quality loop” model, from which the new qualityconcepts are formed. The paper elaborates the contents and the process of setting up the models. The big quality problemsof the system can be handled by the new quality concept and model that are validated in practice.
文摘The experimental observations about the complex nonlinear behavior of spontaneous pulsing of dc biased,p-i-n diodes RC circuits are reported.Time intervals series between successive pulses in spike trains were analyzed.Transitions from quasiperiodicity into chaos via mode-locking were observed.The phase portrait is analyzed to reveal that the system is really characterized by a strange attractor.Finally,the embedding algorithm has applied to determine the fractal dimension of the attractor.
基金National Key Laboratory Foundation for Remanufacting(9140C85040209OC8510)
文摘Microwave irradiation was used to reduce the curing time of carbon fiber/epoxy resin composite material.The properties of carbon fiber/epoxy resin composite material under microwave curing were investigated by thermogravimetry(TG),dynamic mechanical analysis(DMA),impact strength test and scanning electron microscope(SEM).The results show that composite materials patch have high thermal stability after microwave curing.The initial degradation temperature is 330.9℃,the maximum thermal decomposition rate is at 368.1℃.When the layer of composite materials patchis 4 layers,the dynamic mechanical properties are the best after microwave curing.The initial storage modulus is 43.2 GPa,increased 28.3 GPa and 27.1 GPa than 3 layers and 5 layers,the glass transition temperature(Tg)is 67.48℃,increased about 12 ℃than 3 layers and 5 layers.Microwave curing can significantly improve the infiltration capacity of epoxy resin,enhance interfacial bonding,and increase the impact strength of composite patch.Under microwave curing,the impact strength of 3,4,5-layers composite material patches increases 35.9%,6.4% and 15.1%,respectively than heating curing.The SEM analysis of impact fracture surface shows that microwave curing can improve the interface of carbon fiber and epoxy resin.
