A timing decision-making method for predecisional remanufacturing is presented.The method can effectively solve the uncertainty problem of remanufacturing blanks.From the perspective of reliability,this study analyzes...A timing decision-making method for predecisional remanufacturing is presented.The method can effectively solve the uncertainty problem of remanufacturing blanks.From the perspective of reliability,this study analyzes the timing decision-making interval for predecisional remanufacturing of mechanical products during the service period and constructs an optimal timing model based on energy consumption and cost.The mapping relationships between time and energy consumption are predicted by using the characteristic values of performance degradation of products combined with the least squares support vector regression algorithm.Application of game theory reveals that when the energy consumption and cost are comprehensively optimal,this moment is the best time for predecisional remanufacturing.Used engine blades are utilized as an example to demonstrate the validity and effectiveness of the proposed method.展开更多
Cephalopods(octopus,squid and cuttlefish)are some of the most intriguing molluscs,and they represent economically important commercial marine species for fisheries.Previous studies have shown that cephalopods are sens...Cephalopods(octopus,squid and cuttlefish)are some of the most intriguing molluscs,and they represent economically important commercial marine species for fisheries.Previous studies have shown that cephalopods are sensitive to underwater particle motion,especially at low frequencies in the order of 10 Hz.The present paper deals with quantitative modeling of the statocyst system in three cephalopod species:Octopus vulgaris,Sepia officinalis and Loligo vulgaris.The octopus’s macula/statolith organ was modeled as a 2nd-order dynamic oscillator using parameter values estimated from scanning electron micrograph images.The modeling results agree reasonably well with experimental data(acceleration threshold)in the three cephalopod species.Insights made from quantitative modeling and simulating the particle motion sensing mechanism of cephalopods elucidated their underwater particle motion detection capabilities.Sensitivity to emerging environmental issues,such as low frequency noise caused by near-shore wind farms and increasing levels of carbon dioxide in the ocean,and sensitivity to sounds produced by impending landslides were investigated in octopus using the model.展开更多
Density functional theory(DFT)was utilized to simulate the reactions occurred in the mixture solution of cysteine and Hg(II)ions with the ratio\2.Simulation result shows that Hg ions will coordinate to cysteine by the...Density functional theory(DFT)was utilized to simulate the reactions occurred in the mixture solution of cysteine and Hg(II)ions with the ratio\2.Simulation result shows that Hg ions will coordinate to cysteine by the thiol groups with the form of S–Hg2and S–Hg3,and moreover,the content of free Hg ions can only be reduced by these two forms.OH-plays an important role in the growth of b-HgS,because its nucleophilic substitution reaction supplies plenty of Hg–S–Hg radicals,which will be adsorbed onto the surface of liquid mercury ball and form the precursor of b-HgS(111)plane.Three valent bonds adsorption of Hg–S–Hg radicals onto the surface of Hg ball has more adsorption energy(-32.768 kcal mol-1)than that of two valent bond adsorption(-20.882 kcalmol-1).Hg balls will stop growing after completely covered with Hg–S–Hg radicals and their size will be limited.The growth direction of b-HgS is parallel to the‘‘repelling’’force,that is[111]direction in b-HgS lattice.The calculated results are in good agreement with the experimental observations,demonstrating that the DFT method can be taken as a very useful tool to interpret the solution reactions that cannot be solved by conventional methods.展开更多
基金This research was sponsored by the National Natural Science Foundation of China(Grant Nos.51605347 and 51775392).
文摘A timing decision-making method for predecisional remanufacturing is presented.The method can effectively solve the uncertainty problem of remanufacturing blanks.From the perspective of reliability,this study analyzes the timing decision-making interval for predecisional remanufacturing of mechanical products during the service period and constructs an optimal timing model based on energy consumption and cost.The mapping relationships between time and energy consumption are predicted by using the characteristic values of performance degradation of products combined with the least squares support vector regression algorithm.Application of game theory reveals that when the energy consumption and cost are comprehensively optimal,this moment is the best time for predecisional remanufacturing.Used engine blades are utilized as an example to demonstrate the validity and effectiveness of the proposed method.
基金supported by the National Science Foundation under Grant No.CMMI-1031414.
文摘Cephalopods(octopus,squid and cuttlefish)are some of the most intriguing molluscs,and they represent economically important commercial marine species for fisheries.Previous studies have shown that cephalopods are sensitive to underwater particle motion,especially at low frequencies in the order of 10 Hz.The present paper deals with quantitative modeling of the statocyst system in three cephalopod species:Octopus vulgaris,Sepia officinalis and Loligo vulgaris.The octopus’s macula/statolith organ was modeled as a 2nd-order dynamic oscillator using parameter values estimated from scanning electron micrograph images.The modeling results agree reasonably well with experimental data(acceleration threshold)in the three cephalopod species.Insights made from quantitative modeling and simulating the particle motion sensing mechanism of cephalopods elucidated their underwater particle motion detection capabilities.Sensitivity to emerging environmental issues,such as low frequency noise caused by near-shore wind farms and increasing levels of carbon dioxide in the ocean,and sensitivity to sounds produced by impending landslides were investigated in octopus using the model.
基金supported by the National Research Fund for Fundamental Key Project (2014CB931801)the National Natural Science Foundation for Distinguished Youth Scholars of China (21025310)the National Natural Science Foundation of China (91027011)
文摘Density functional theory(DFT)was utilized to simulate the reactions occurred in the mixture solution of cysteine and Hg(II)ions with the ratio\2.Simulation result shows that Hg ions will coordinate to cysteine by the thiol groups with the form of S–Hg2and S–Hg3,and moreover,the content of free Hg ions can only be reduced by these two forms.OH-plays an important role in the growth of b-HgS,because its nucleophilic substitution reaction supplies plenty of Hg–S–Hg radicals,which will be adsorbed onto the surface of liquid mercury ball and form the precursor of b-HgS(111)plane.Three valent bonds adsorption of Hg–S–Hg radicals onto the surface of Hg ball has more adsorption energy(-32.768 kcal mol-1)than that of two valent bond adsorption(-20.882 kcalmol-1).Hg balls will stop growing after completely covered with Hg–S–Hg radicals and their size will be limited.The growth direction of b-HgS is parallel to the‘‘repelling’’force,that is[111]direction in b-HgS lattice.The calculated results are in good agreement with the experimental observations,demonstrating that the DFT method can be taken as a very useful tool to interpret the solution reactions that cannot be solved by conventional methods.
