The singularities and oscillatory performance of translating-pulsating source Green＇s function in Bessho form were analyzed. Relative numerical integration methods such as Gaussian quadrature rule, variable substitut...The singularities and oscillatory performance of translating-pulsating source Green＇s function in Bessho form were analyzed. Relative numerical integration methods such as Gaussian quadrature rule, variable substitution method （VSM）, and steepest descent integration method （SDIM） were used to evaluate this type of Green＇s function. For SDIM, the complex domain was restricted only on the 0-plane. Meanwhile, the integral along the real axis was computed by use of the VSM to avoid the complication of a numerical search of the steepest descent line. Furthermore, the steepest descent line was represented by the B-spline function. Based on this representation, a new self-compatible integration method corresponding to parametric t was established. The numerical method was validated through comparison with other existing results, and was shown to be efficient and reliable in the calculation of the velocity potentials for the 3D seakeeping and hydrodynamic performance of floating struc- tures moving in waves.展开更多
由于BPEL语言的XML表示十分冗长以及没有形式化的分析技术,其抽象级别不适合用于业务流程分析和设计。而业务流程分析师和设计者更容易接受高级别的抽象模式,例如BPMN(Business Process Modeling Notation)。很多建模工具支持BPMN,但是...由于BPEL语言的XML表示十分冗长以及没有形式化的分析技术,其抽象级别不适合用于业务流程分析和设计。而业务流程分析师和设计者更容易接受高级别的抽象模式,例如BPMN(Business Process Modeling Notation)。很多建模工具支持BPMN,但是到目前为止没有系统可直接执行BPMN模型。因此,需要一种转换方法,可将BPMN转换成BPEL,来提高企业业务流程的分析、设计和开发能力,更能够适应业务需求的变化,以提高投资回报率。本文通过对BPMN和BPEL的分析,提出将一个由BPMN实现的业务流程模型转换为相应的BPEL代码的算法。最后通过一个实例来说明如何实现本文所提出的转换方法。展开更多
基金Project supported by the National Natural Science Foundation of China （No. 50879090）, and the Key Research Program of Hydrody- namics of China （No. 9140A 14030712JB 11044）
文摘The singularities and oscillatory performance of translating-pulsating source Green＇s function in Bessho form were analyzed. Relative numerical integration methods such as Gaussian quadrature rule, variable substitution method （VSM）, and steepest descent integration method （SDIM） were used to evaluate this type of Green＇s function. For SDIM, the complex domain was restricted only on the 0-plane. Meanwhile, the integral along the real axis was computed by use of the VSM to avoid the complication of a numerical search of the steepest descent line. Furthermore, the steepest descent line was represented by the B-spline function. Based on this representation, a new self-compatible integration method corresponding to parametric t was established. The numerical method was validated through comparison with other existing results, and was shown to be efficient and reliable in the calculation of the velocity potentials for the 3D seakeeping and hydrodynamic performance of floating struc- tures moving in waves.
文摘由于BPEL语言的XML表示十分冗长以及没有形式化的分析技术,其抽象级别不适合用于业务流程分析和设计。而业务流程分析师和设计者更容易接受高级别的抽象模式,例如BPMN(Business Process Modeling Notation)。很多建模工具支持BPMN,但是到目前为止没有系统可直接执行BPMN模型。因此,需要一种转换方法,可将BPMN转换成BPEL,来提高企业业务流程的分析、设计和开发能力,更能够适应业务需求的变化,以提高投资回报率。本文通过对BPMN和BPEL的分析,提出将一个由BPMN实现的业务流程模型转换为相应的BPEL代码的算法。最后通过一个实例来说明如何实现本文所提出的转换方法。
