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Discrimination of Junctions in Line Drawing by Computer
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作者 YANG En DONG Li-jun 《Computer Aided Drafting,Design and Manufacturing》 2010年第1期99-103,共5页
For discrimination of the common W-junction and Y-junction in the labels of line drawing for a three-dimensional manifold plane surface with trihedral vertices, the existing algorithms are almost using angles between ... For discrimination of the common W-junction and Y-junction in the labels of line drawing for a three-dimensional manifold plane surface with trihedral vertices, the existing algorithms are almost using angles between two adjacent lines and W-junction and Y- junction's definitions, and other complex methods. This passage gives four methods with their detailed mathematical inference processes in order to use these algorithms implemented by computer. The algorithms listed are Angle Summation method and Points to the Line method, Triangle methods which are the Triangle Area method and the Cross method. When the computer programs discriminate junctions, by comparison, the Angle Summation method and Points to the Line method are less efficacious than the Triangle method, and Cross method is more efficacious than the Triangle Area method in the Triangle method. 展开更多
关键词 line drawing labeling JUNCTIONS angle summation method points to the line method triangle method
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Efficient Numerical Valuation of Continuous Installment Options
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作者 Anton Mezentsev Anton Pomelnikov Matthias Ehrhardt 《Advances in Applied Mathematics and Mechanics》 SCIE 2011年第2期141-164,共24页
In this work we investigate the novel Kryzhnyi method for the numerical inverse Laplace transformation and apply it to the pricing problem of continuous installment options.We compare the results with the one obtained... In this work we investigate the novel Kryzhnyi method for the numerical inverse Laplace transformation and apply it to the pricing problem of continuous installment options.We compare the results with the one obtained using other classical methods for the inverse Laplace transformation,like the Euler summation method or the Gaver-Stehfest method. 展开更多
关键词 Installment options Black-Scholes equation numerical inverse Laplace transform Gaver-Stehfest method Euler summation method optimal stopping problem non-monotonic stopping boundary
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