Clarke’s matrix has been applied as a phase-mode transformation matrix to three-phase transmission lines substituting the eigenvector matrices. Considering symmetrical untransposed three-phase lines, an actual symmet...Clarke’s matrix has been applied as a phase-mode transformation matrix to three-phase transmission lines substituting the eigenvector matrices. Considering symmetrical untransposed three-phase lines, an actual symmetrical three-phase line on untransposed conditions is associated with Clarke’s matrix for error and frequency scan analyses in this paper. Error analyses are calculated for the eigenvalue diagonal elements obtained from Clarke’s matrix. The eigenvalue off-diagonal elements from the Clarke’s matrix application are compared to the correspondent exact eigenvalues. Based on the characteristic impedance and propagation function values, the frequency scan analyses show that there are great differences between the Clarke’s matrix results and the exact ones, considering frequency values from 10 kHz to 1 MHz. A correction procedure is applied obtaining two new transformation matrices. These matrices lead to good approximated results when compared to the exact ones. With the correction procedure applied to Clarke’s matrix, the relative values of the eigenvalue matrix off-diagonal element obtained from Clarke’s matrix are decreased while the frequency scan results are improved. The steps of correction procedure application are detailed, investigating the influence of each step on the obtained two new phase-mode transformation matrices.展开更多
The main components of Artemisia leucophylla(Turcz.ex Bess.) C.B.Clarke extract are volatile oils,flavonoids,lignans,terpenoids,etc.Studies have shown that A.leucophylla has bactericidal,anti-inflammatory,anti-oxidant...The main components of Artemisia leucophylla(Turcz.ex Bess.) C.B.Clarke extract are volatile oils,flavonoids,lignans,terpenoids,etc.Studies have shown that A.leucophylla has bactericidal,anti-inflammatory,anti-oxidant,anti-ultraviolet functions,and it has large development space and application value in many fields.This paper first introduced the growth resource distribution,active component extraction method,composition and efficacy of A.leucophylla,and analyzed the application prospects in daily necessities,in order to provide reference for the in-depth research,development and utilization of A.leucophylla.展开更多
The intellectual background of the concept of force in the dispute between Leibniz and Clarke has not received enough scholarly attention. Vailati＇s monograph, which is the most important study of the Leibniz-Clarke ...The intellectual background of the concept of force in the dispute between Leibniz and Clarke has not received enough scholarly attention. Vailati＇s monograph, which is the most important study of the Leibniz-Clarke correspondence, focuses on a non-theological dimension in terms of the concept of force in this debate. Based on this perspective, Vailati＇s conclusion is that Clarke＇s understanding of force was totally different from that of Newton. However, the historical context shows that this is not the case. Clarke＇s concept of motive force bore a strong resemblance to that of Newton, according to which force was an active principle that had been endowed upon matter at the beginning of God＇s creation. Furthermore, the close link between force, matter and God＇s providence had a long tradition of debate between Cartesian and Gassendian philosophers since early modem times. The different concepts of force dividing Cartesian and Gassendian philosophers were actually related to, and conditioned by, their underlying fundamental theological differences. The concept of force in the Leibniz-Clarke controversy, accordingly, could be regarded as along the lines of the earlier disputes between Cartesian and Gassendian philosophers.展开更多
文摘Clarke’s matrix has been applied as a phase-mode transformation matrix to three-phase transmission lines substituting the eigenvector matrices. Considering symmetrical untransposed three-phase lines, an actual symmetrical three-phase line on untransposed conditions is associated with Clarke’s matrix for error and frequency scan analyses in this paper. Error analyses are calculated for the eigenvalue diagonal elements obtained from Clarke’s matrix. The eigenvalue off-diagonal elements from the Clarke’s matrix application are compared to the correspondent exact eigenvalues. Based on the characteristic impedance and propagation function values, the frequency scan analyses show that there are great differences between the Clarke’s matrix results and the exact ones, considering frequency values from 10 kHz to 1 MHz. A correction procedure is applied obtaining two new transformation matrices. These matrices lead to good approximated results when compared to the exact ones. With the correction procedure applied to Clarke’s matrix, the relative values of the eigenvalue matrix off-diagonal element obtained from Clarke’s matrix are decreased while the frequency scan results are improved. The steps of correction procedure application are detailed, investigating the influence of each step on the obtained two new phase-mode transformation matrices.
基金Supported by Project of National Natural Science Foundation of China(21503072)Project of China Scholarship Council(20163035)+2 种基金Project of Introduction of Return Talents(XDB-2017-19)Student’s Platform for Innovation and Entrepreneurship Training Program at State Level(201710223002)Guiding Science and Technology Program of Daqing City(ZD-2017-59)
文摘The main components of Artemisia leucophylla(Turcz.ex Bess.) C.B.Clarke extract are volatile oils,flavonoids,lignans,terpenoids,etc.Studies have shown that A.leucophylla has bactericidal,anti-inflammatory,anti-oxidant,anti-ultraviolet functions,and it has large development space and application value in many fields.This paper first introduced the growth resource distribution,active component extraction method,composition and efficacy of A.leucophylla,and analyzed the application prospects in daily necessities,in order to provide reference for the in-depth research,development and utilization of A.leucophylla.
文摘The intellectual background of the concept of force in the dispute between Leibniz and Clarke has not received enough scholarly attention. Vailati＇s monograph, which is the most important study of the Leibniz-Clarke correspondence, focuses on a non-theological dimension in terms of the concept of force in this debate. Based on this perspective, Vailati＇s conclusion is that Clarke＇s understanding of force was totally different from that of Newton. However, the historical context shows that this is not the case. Clarke＇s concept of motive force bore a strong resemblance to that of Newton, according to which force was an active principle that had been endowed upon matter at the beginning of God＇s creation. Furthermore, the close link between force, matter and God＇s providence had a long tradition of debate between Cartesian and Gassendian philosophers since early modem times. The different concepts of force dividing Cartesian and Gassendian philosophers were actually related to, and conditioned by, their underlying fundamental theological differences. The concept of force in the Leibniz-Clarke controversy, accordingly, could be regarded as along the lines of the earlier disputes between Cartesian and Gassendian philosophers.
