Seismic geophone is the key instrument for seismic data acquisition in the fields of oil and gas exploration and other relevant fields.It plays an important role in data quality,subsequent processing and interpretatio...Seismic geophone is the key instrument for seismic data acquisition in the fields of oil and gas exploration and other relevant fields.It plays an important role in data quality,subsequent processing and interpretation.Aiming at the shortcomings of the existing geophones,such as large volume,heavy weight,unable to monitor in real-time,and heavy workload of data transmission and storage,this paper designs and implements a wireless geophone based on STM32 embedded microcontroller.It is mainly composed of STM32 microcontroller,acceleration sensor,global positioning system(GPS)module,Wi-Fi module and real-time seismic data receiving and processing module.Firstly,the acceleration of vibration in three directions is sensed by the acceleration sensor;secondly,the sampling and analog-to-digital conversion of the vibration data is controlled by the microcontroller;thirdly,the vibration and GPS data are sent to the personal computer(PC)through Wi-Fi,and the personal coomputer PC-side software module completes the reception,display,monitoring and storage of the seismic data;finally,the feasibility and effectiveness of the designed wireless geophone are verified through actual seismic data acquisition experiments.展开更多
The nature of the NH_(3) adsorption process on Si(100)-2×1 surface has been studied by DV-Xα(discrete variational Xαmethod)and ASED-MO(atom superposition and electron delocalization molecular orbital theory)met...The nature of the NH_(3) adsorption process on Si(100)-2×1 surface has been studied by DV-Xα(discrete variational Xαmethod)and ASED-MO(atom superposition and electron delocalization molecular orbital theory)methods.The calculated results show that NH3 is dissociatively adsorbed on the surface dangling bonds as NH_(2)(a)and H(a)un'th no activation barrier.But the further decomposion of NH_(2)(a)to NH(a)and N(a)has been found to have activation barriers of 0.87 and 1.65eV respectively.The bond geometries and electronic structures of these NH3-derived adsorbed species are described in detail.展开更多
基金Supported by the National Natural Science Foundation of China(No.41804135)Key Laboratory of Petroleum Resources Research,Institute of Geology and Geophysics,Chinese Academy of Sciences,Open Project(No.KLOR2018-9)Beijing Information Science and Technology University Research Fund Project(No.2025025).
文摘Seismic geophone is the key instrument for seismic data acquisition in the fields of oil and gas exploration and other relevant fields.It plays an important role in data quality,subsequent processing and interpretation.Aiming at the shortcomings of the existing geophones,such as large volume,heavy weight,unable to monitor in real-time,and heavy workload of data transmission and storage,this paper designs and implements a wireless geophone based on STM32 embedded microcontroller.It is mainly composed of STM32 microcontroller,acceleration sensor,global positioning system(GPS)module,Wi-Fi module and real-time seismic data receiving and processing module.Firstly,the acceleration of vibration in three directions is sensed by the acceleration sensor;secondly,the sampling and analog-to-digital conversion of the vibration data is controlled by the microcontroller;thirdly,the vibration and GPS data are sent to the personal computer(PC)through Wi-Fi,and the personal coomputer PC-side software module completes the reception,display,monitoring and storage of the seismic data;finally,the feasibility and effectiveness of the designed wireless geophone are verified through actual seismic data acquisition experiments.
基金Supported by the National Natural Science Foundation of China.
文摘The nature of the NH_(3) adsorption process on Si(100)-2×1 surface has been studied by DV-Xα(discrete variational Xαmethod)and ASED-MO(atom superposition and electron delocalization molecular orbital theory)methods.The calculated results show that NH3 is dissociatively adsorbed on the surface dangling bonds as NH_(2)(a)and H(a)un'th no activation barrier.But the further decomposion of NH_(2)(a)to NH(a)and N(a)has been found to have activation barriers of 0.87 and 1.65eV respectively.The bond geometries and electronic structures of these NH3-derived adsorbed species are described in detail.
