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Motion Regular Analysis and Its Simulation of the Rodless Drilling Unit's Guiding & Positioning Board
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作者 胡长胜 赵伟民 马强 《Journal of Donghua University(English Edition)》 EI CAS 2009年第1期31-35,共5页
To analyze the stress of the guiding & positioning board and the effectiveness of the guiding & positioning device,according to guiding & positioning device's operational principle and structure,the gu... To analyze the stress of the guiding & positioning board and the effectiveness of the guiding & positioning device,according to guiding & positioning device's operational principle and structure,the guiding & positioning board's motion regular was analyzed by diagrammatical method based on 2 postulated conditions.Considering about the working conditions' change,simulations in 5 different kinds of working conditions were done to check the correctness of the motion regulars obtained by diagrammatical method.Simulation results prove that the motion regulars are right,the postulated conditions have no effect on the obtained motion regulars.According to the simulation results,the motion processs's characters were drawn out at the same time. 展开更多
关键词 rodless drilling uint guiding positioningdevice guiding positioning board motion regular diagrammatical method simulation test
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ON POSITIVE SOLUTIONS OF ONE CLASS OF NONLINEAR DIFFERENTIAL EQUATIONS
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作者 杨春鹏 《Acta Mathematica Scientia》 SCIE CSCD 1996年第4期469-476,共8页
In this paper, we establish a 1-1 correspondence between positive solutionsof one class of nonlinear differential equations and a class of harmonic functions.These results give an explicit description of E.B.Dynkin... In this paper, we establish a 1-1 correspondence between positive solutionsof one class of nonlinear differential equations and a class of harmonic functions.These results give an explicit description of E.B.Dynkin's class Ha of positive harmonic functions. 展开更多
关键词 Brownian motion Super-Brownian motion Regular harmonic function.
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