Artificial Immune Network （aiNet） algorithms have become popular for global optimization in many modem industrial applications. However, high-dimensional systems using such models suffer from a potential premature c...Artificial Immune Network （aiNet） algorithms have become popular for global optimization in many modem industrial applications. However, high-dimensional systems using such models suffer from a potential premature convergence problem. In the existing aiNet algorithms, the premature convergence problem can be avoided by implementing various clonal selection methods, such as immune suppression and mutation approaches, both for single population and multi-population cases. This paper presents a new Multi-Agent Artificial Immune Network （Ma-aiNet） algorithm, which combines immune mechanics and multiagent technology, to overcome the premature convergence problem in high-dimensional systems and to efficiently use the agent ability of sensing and acting on the environment. Ma-aiNet integrates global and local search algorithms. The perform- ance of the proposed method is evaluated using 10 benchmark problems, and the results are compared with other well-known intelligent algorithms. The study demonstrates that Ma-aiNet outperforms other algorithms tested. Ma-aiNet is also used to determine the Murphree efficiency of a distillation column with satisfactory results.展开更多
A powerful earthquake of moment magnitude(Mw)7.8occurred in the Kaikoura region,South Island,New Zealand,at00:02:56 AM(local time),14 November 2016.According to the Institute of Geological and Nuclear Sciences(GNS)in ...A powerful earthquake of moment magnitude(Mw)7.8occurred in the Kaikoura region,South Island,New Zealand,at00:02:56 AM(local time),14 November 2016.According to the Institute of Geological and Nuclear Sciences(GNS)in New Zealand,展开更多
The diffusion of poly(ethy1ene glycol)(PEG)in polypropylene(PP)was investigated using attenuated total reflectance Fourier Transform Infrared Spectroscopy(ATR-FTIR),Atomic Force Micrograph(AFM),and Scanning Electron M...The diffusion of poly(ethy1ene glycol)(PEG)in polypropylene(PP)was investigated using attenuated total reflectance Fourier Transform Infrared Spectroscopy(ATR-FTIR),Atomic Force Micrograph(AFM),and Scanning Electron Microscopy(SEM).It has been found that the diffusion of PEG in PP was greatly affected by the annealing temperature and the molecular weight of PEG.Higher temperature was in favor of PEG to diffuse in PP with fast velocity and reached diffusion equilibrium with shorter time.PEG with higher molecular weight was distributed in PP with bigger phase domains and had lower diffusivity,which resulted in its lesser enrichment on the surface of the PP blend film.展开更多
A novel macromolecular surface modifier,polypropylene-grafted-poly(ethylene glycol)copolymer(PP-g-PEG),was synthesized by coupling polypropylene containing maleic anhydride with monohydroxyl-termi-nated poly(ethylene ...A novel macromolecular surface modifier,polypropylene-grafted-poly(ethylene glycol)copolymer(PP-g-PEG),was synthesized by coupling polypropylene containing maleic anhydride with monohydroxyl-termi-nated poly(ethylene glycol).The effects of the reaction condition on the graft reactions were studied.The copo-lymers were characterized by IR,1 H NMR,thermogravi-metry(TG)and differential scanning calorimetry(DSC).The results indicated that the graft reactions were hin-dered by increasing the molecular weight of PP or PEG.The graft copolymer was found to have a higher initial thermal degradation temperature and lower crystalliza-tion capacity as compared with pure PP,and the side chain of PEG hindered the PP chain from forming a per-fect b crystal.The thermal stability of PP-g-PEG decreased with the increasing content or molecular weight of PEG.The copolymers were blended with polypropy-lene to modify the surface hydrophilicity of the products.The results of attenuated total reflectance FTIR spectro-scopy(ATR-FTIR)showed that PP-g-PEG could diffuse preferably onto the surface of the blends and be suitableas an effectual macromolecular surface modifier for PP.展开更多
基金Acknowledgments This work was supported by the National Science Fund for Distinguished Young Scholars （No.60625302）, National Natural Science Foundation of China （2009CB320603）, Shanghai Key Technologies R＆D Program（10JC1403500）, Chang3iang Scholars and In- novative Research Team in University（IRT0721）, the 111 Project（B08021）, Shanghai Leading Academic Discipline Project（B504） and Zhejiang Natural Science Fund （Y1090548）.
文摘Artificial Immune Network （aiNet） algorithms have become popular for global optimization in many modem industrial applications. However, high-dimensional systems using such models suffer from a potential premature convergence problem. In the existing aiNet algorithms, the premature convergence problem can be avoided by implementing various clonal selection methods, such as immune suppression and mutation approaches, both for single population and multi-population cases. This paper presents a new Multi-Agent Artificial Immune Network （Ma-aiNet） algorithm, which combines immune mechanics and multiagent technology, to overcome the premature convergence problem in high-dimensional systems and to efficiently use the agent ability of sensing and acting on the environment. Ma-aiNet integrates global and local search algorithms. The perform- ance of the proposed method is evaluated using 10 benchmark problems, and the results are compared with other well-known intelligent algorithms. The study demonstrates that Ma-aiNet outperforms other algorithms tested. Ma-aiNet is also used to determine the Murphree efficiency of a distillation column with satisfactory results.
基金supported by the Earth Observatory of Singapore(EOS)Nanyang Technological University through its funding from the National Research Foundation Singapore and the Singapore Ministry of Education under the Research Centers of Excellence initiative
文摘A powerful earthquake of moment magnitude(Mw)7.8occurred in the Kaikoura region,South Island,New Zealand,at00:02:56 AM(local time),14 November 2016.According to the Institute of Geological and Nuclear Sciences(GNS)in New Zealand,
基金The financial supports by the Science and Technology Program of Guangdong Province(No.2007B080701024)the National Natural Science Foundation of China(Grant No.50273048)。
文摘The diffusion of poly(ethy1ene glycol)(PEG)in polypropylene(PP)was investigated using attenuated total reflectance Fourier Transform Infrared Spectroscopy(ATR-FTIR),Atomic Force Micrograph(AFM),and Scanning Electron Microscopy(SEM).It has been found that the diffusion of PEG in PP was greatly affected by the annealing temperature and the molecular weight of PEG.Higher temperature was in favor of PEG to diffuse in PP with fast velocity and reached diffusion equilibrium with shorter time.PEG with higher molecular weight was distributed in PP with bigger phase domains and had lower diffusivity,which resulted in its lesser enrichment on the surface of the PP blend film.
基金The financial supports by the National Natural Science Foundation of China(Grant No.50273048)the Ministry of Education of China are gratefully acknowledged.
文摘A novel macromolecular surface modifier,polypropylene-grafted-poly(ethylene glycol)copolymer(PP-g-PEG),was synthesized by coupling polypropylene containing maleic anhydride with monohydroxyl-termi-nated poly(ethylene glycol).The effects of the reaction condition on the graft reactions were studied.The copo-lymers were characterized by IR,1 H NMR,thermogravi-metry(TG)and differential scanning calorimetry(DSC).The results indicated that the graft reactions were hin-dered by increasing the molecular weight of PP or PEG.The graft copolymer was found to have a higher initial thermal degradation temperature and lower crystalliza-tion capacity as compared with pure PP,and the side chain of PEG hindered the PP chain from forming a per-fect b crystal.The thermal stability of PP-g-PEG decreased with the increasing content or molecular weight of PEG.The copolymers were blended with polypropy-lene to modify the surface hydrophilicity of the products.The results of attenuated total reflectance FTIR spectro-scopy(ATR-FTIR)showed that PP-g-PEG could diffuse preferably onto the surface of the blends and be suitableas an effectual macromolecular surface modifier for PP.
