Daqo Group inaugurated expansion of the polysilicon project phase I in Wanzhou, Chongqingon June 30th, bringing annual production capacity to 1 800 tons.Chongqing Daqo New Energy Co.,a unit of Daqo Group, had launched...Daqo Group inaugurated expansion of the polysilicon project phase I in Wanzhou, Chongqingon June 30th, bringing annual production capacity to 1 800 tons.Chongqing Daqo New Energy Co.,a unit of Daqo Group, had launched the展开更多
Almost seven decades have elapsed since the establishment of the Chouniugou Formation. This formation used to be considered as a mark for the recognition, division and correlation of the Late Visean biostratigraphic u...Almost seven decades have elapsed since the establishment of the Chouniugou Formation. This formation used to be considered as a mark for the recognition, division and correlation of the Late Visean biostratigraphic unit in China due to its abundant marine biotas such as gigantoproductids and coral Yuanophyllum. Although many geologists and palaeontologists had reinvestigated the typical section of this formation, they came to展开更多
Dryden model is usually used in studying the response of flight vehicle to atmospheric turbulence. For a modern flight simulator,it is necessary to generate random winds ( in Dryden model or sometimes others) with a d...Dryden model is usually used in studying the response of flight vehicle to atmospheric turbulence. For a modern flight simulator,it is necessary to generate random winds ( in Dryden model or sometimes others) with a digital computer.In this paper,a theoretically strict new method to meet this purpose is proposed.By this method,we can acquire a three-dimensional atmospheric turbulence which contains three components of wind velocity and three components of wind velocity gradient.The reliability of this method is checked by comparing the obtained autocorrelation value with the theoretical one.A numerical example has shown a satisfactory result.Finally,some proposals about how to use this mathematical model in flight simulator are given.展开更多
文摘Daqo Group inaugurated expansion of the polysilicon project phase I in Wanzhou, Chongqingon June 30th, bringing annual production capacity to 1 800 tons.Chongqing Daqo New Energy Co.,a unit of Daqo Group, had launched the
文摘Almost seven decades have elapsed since the establishment of the Chouniugou Formation. This formation used to be considered as a mark for the recognition, division and correlation of the Late Visean biostratigraphic unit in China due to its abundant marine biotas such as gigantoproductids and coral Yuanophyllum. Although many geologists and palaeontologists had reinvestigated the typical section of this formation, they came to
文摘Dryden model is usually used in studying the response of flight vehicle to atmospheric turbulence. For a modern flight simulator,it is necessary to generate random winds ( in Dryden model or sometimes others) with a digital computer.In this paper,a theoretically strict new method to meet this purpose is proposed.By this method,we can acquire a three-dimensional atmospheric turbulence which contains three components of wind velocity and three components of wind velocity gradient.The reliability of this method is checked by comparing the obtained autocorrelation value with the theoretical one.A numerical example has shown a satisfactory result.Finally,some proposals about how to use this mathematical model in flight simulator are given.
