In this paper, we represent a new numerical method for solving the nonstationary Stokes equations in an unbounded domain. The technique consists in coupling the boundary integral and finite element methods. The variat...In this paper, we represent a new numerical method for solving the nonstationary Stokes equations in an unbounded domain. The technique consists in coupling the boundary integral and finite element methods. The variational formulation and well posedness of the coupling method are obtained. The convergence and optimal estimates for the approximation solution are provided.展开更多
The method to calculate the coupling loss factors for non-conservatively coupled structures by using the mobilities of substructures is studied. By using the form of the energy balance equations of conservatively coup...The method to calculate the coupling loss factors for non-conservatively coupled structures by using the mobilities of substructures is studied. By using the form of the energy balance equations of conservatively coupled systems, the relationship between the coupling loss factors and the energy ratios in non-conservatively coupled systems is derived. The method to calculate the energy ratios by using the mobilities of substructures is introduced, and experiment verification is carried out. The test data agree well with the predicted results.展开更多
Multicore-fiber as gain medium for fiber laser is introduced. The cores are coupled via evanescent waves. Analysis of the coupling waves is agree with the numerical simulations and experimental results.
In this paper, a new method is outlined for the estimation of coupling efficiency between a source laser and a WGPD. Internal quantum efficiencies as high as 72% (for 0.15μm device) and 86.5% (for 0.5μm device) are ...In this paper, a new method is outlined for the estimation of coupling efficiency between a source laser and a WGPD. Internal quantum efficiencies as high as 72% (for 0.15μm device) and 86.5% (for 0.5μm device) are achieved.展开更多
The paper presents the variational formulation and well posedness of the coupling method offinite elements and boundary elements for radiation problem. The convergence and optimal errorestimate for the approximate sol...The paper presents the variational formulation and well posedness of the coupling method offinite elements and boundary elements for radiation problem. The convergence and optimal errorestimate for the approximate solution and numerical experiment are provided.展开更多
Oxidation of perfluoroalkanesulfinate usually resulted in the formation of the correspon-ding sulfonyl derivatives,thus reaction with hydrogen peroxide or halogen（Cl,Br,I）gavesulfonic acid or sulfonyl halides.Howeve...Oxidation of perfluoroalkanesulfinate usually resulted in the formation of the correspon-ding sulfonyl derivatives,thus reaction with hydrogen peroxide or halogen（Cl,Br,I）gavesulfonic acid or sulfonyl halides.However in comparison with alkanesulfinate the perfluo-ro analog was shown to be relatively inert toward oxidizing agents.展开更多
The photo-S_(RN) 1 reaction of (+)-camphor and aryl halides was investigated in order to estimate the stereochemistry of the coupling step of aryl radicals with a nucleophile. The ratio of endo to exo products determi...The photo-S_(RN) 1 reaction of (+)-camphor and aryl halides was investigated in order to estimate the stereochemistry of the coupling step of aryl radicals with a nucleophile. The ratio of endo to exo products determined by ~1H NMR and CD spectra was found to be 99:1. MNDO calculations of the orbital parameters showed a favorable one-sided overlap of the enolate ion with the SOMO of aryl radical. In addition, fragmentation of (ArX)^- was found to be related to the energy of SOMO of (ArX)^-.展开更多
The fatigue property of asphalt mixtures under complicated environment （low-temperature bending performance, chloride penetration, freezing-thawing cycle and their coupling effect） and the improvement effect for rel...The fatigue property of asphalt mixtures under complicated environment （low-temperature bending performance, chloride penetration, freezing-thawing cycle and their coupling effect） and the improvement effect for relevant property of basalt fiber-reinforcing asphalt mixture under complicated environment are studied. Two grading types of asphalt mixtures, AC-16I and AC-13I, are chosen, whose optimum asphalt-aggregate ratio and optimum dosage of basalt fiber are determined by the Marshall test. The standard specimens are made firstly, and then the low temperature bending tests of asphalt mixture and basalt fiber-reinforced asphalt mixture under the coupling effect of the chloride erosion and freezing-thawing cycle have been carried out. Finally, the fatigue property tests of asphalt mixture and basalt fiber-reinforced asphalt mixture under complex environment are performed on MTS material testing system. The results indicate that the tensile strength, the maximum curving tensile stress, the curving stiffness modulus, and fatigue properties of asphalt mixture are influenced by the coupling effect of the chloride erosion and freezing-thawing cycle. The low-temperature bending performance and fatigue property of asphalt mixtures under complicated environment can be greatly improved by adding moderate basalt fiber. The dense gradation asphalt mixture possesses stronger ability to resist adverse environmental effects under the same condition.展开更多
文摘In this paper, we represent a new numerical method for solving the nonstationary Stokes equations in an unbounded domain. The technique consists in coupling the boundary integral and finite element methods. The variational formulation and well posedness of the coupling method are obtained. The convergence and optimal estimates for the approximation solution are provided.
文摘The method to calculate the coupling loss factors for non-conservatively coupled structures by using the mobilities of substructures is studied. By using the form of the energy balance equations of conservatively coupled systems, the relationship between the coupling loss factors and the energy ratios in non-conservatively coupled systems is derived. The method to calculate the energy ratios by using the mobilities of substructures is introduced, and experiment verification is carried out. The test data agree well with the predicted results.
文摘Multicore-fiber as gain medium for fiber laser is introduced. The cores are coupled via evanescent waves. Analysis of the coupling waves is agree with the numerical simulations and experimental results.
文摘In this paper, a new method is outlined for the estimation of coupling efficiency between a source laser and a WGPD. Internal quantum efficiencies as high as 72% (for 0.15μm device) and 86.5% (for 0.5μm device) are achieved.
基金This research was supported in part by the Institute for Mathematics and its applications with funds provided by NSF, USA
文摘The paper presents the variational formulation and well posedness of the coupling method offinite elements and boundary elements for radiation problem. The convergence and optimal errorestimate for the approximate solution and numerical experiment are provided.
文摘Oxidation of perfluoroalkanesulfinate usually resulted in the formation of the correspon-ding sulfonyl derivatives,thus reaction with hydrogen peroxide or halogen（Cl,Br,I）gavesulfonic acid or sulfonyl halides.However in comparison with alkanesulfinate the perfluo-ro analog was shown to be relatively inert toward oxidizing agents.
基金Project supported by the National Natural Science Foundation of China.
文摘The photo-S_(RN) 1 reaction of (+)-camphor and aryl halides was investigated in order to estimate the stereochemistry of the coupling step of aryl radicals with a nucleophile. The ratio of endo to exo products determined by ~1H NMR and CD spectra was found to be 99:1. MNDO calculations of the orbital parameters showed a favorable one-sided overlap of the enolate ion with the SOMO of aryl radical. In addition, fragmentation of (ArX)^- was found to be related to the energy of SOMO of (ArX)^-.
基金Fund by Collaborative Innovation Center of Water Conservancy&Transportation Infrastructure Safety,Henan Province,China Postdoctoral Science Fund(No.20110491008)Science and Technology Planning Project of Department of Transportation of Henan Province(No.2013-2-12)The State Key Laboratory Open Fund of Harbor,Coastal and Offshore Engineering(No.LP1113)
文摘The fatigue property of asphalt mixtures under complicated environment （low-temperature bending performance, chloride penetration, freezing-thawing cycle and their coupling effect） and the improvement effect for relevant property of basalt fiber-reinforcing asphalt mixture under complicated environment are studied. Two grading types of asphalt mixtures, AC-16I and AC-13I, are chosen, whose optimum asphalt-aggregate ratio and optimum dosage of basalt fiber are determined by the Marshall test. The standard specimens are made firstly, and then the low temperature bending tests of asphalt mixture and basalt fiber-reinforced asphalt mixture under the coupling effect of the chloride erosion and freezing-thawing cycle have been carried out. Finally, the fatigue property tests of asphalt mixture and basalt fiber-reinforced asphalt mixture under complex environment are performed on MTS material testing system. The results indicate that the tensile strength, the maximum curving tensile stress, the curving stiffness modulus, and fatigue properties of asphalt mixture are influenced by the coupling effect of the chloride erosion and freezing-thawing cycle. The low-temperature bending performance and fatigue property of asphalt mixtures under complicated environment can be greatly improved by adding moderate basalt fiber. The dense gradation asphalt mixture possesses stronger ability to resist adverse environmental effects under the same condition.
