提出了一种基于8 bit CPU的混合信号SoC的验证平台。该平台能够完成IP模块验证、软硬件协同验证、混合验证等关键验证流程。该验证平台已经成功地应用在某混合信号SoC的设计上,并在0.35μm CMOS工艺上进行了实现。该验证平台对其它混合...提出了一种基于8 bit CPU的混合信号SoC的验证平台。该平台能够完成IP模块验证、软硬件协同验证、混合验证等关键验证流程。该验证平台已经成功地应用在某混合信号SoC的设计上,并在0.35μm CMOS工艺上进行了实现。该验证平台对其它混合SoC设计具有一定的参考作用。展开更多
During the construction of Mengyejing Potassium Salt Drilling Project in southwest Yunnan, according to the previous construction experience and the formation situation, improve the drilling efficiency and heart rate....During the construction of Mengyejing Potassium Salt Drilling Project in southwest Yunnan, according to the previous construction experience and the formation situation, improve the drilling efficiency and heart rate. During the construction, we adopt new drilling technology and newly developed coring equipment, and the drilling efficiency was increased by 30% on average. The heart rate increased by about 10%-20%.展开更多
Acquiring pristine deep lunar regolith cores with appropriate drilling tools is crucial for deciphering the lunar geological history.Conventional thick-walled drill bits are inherently limited in obtaining deep lunar ...Acquiring pristine deep lunar regolith cores with appropriate drilling tools is crucial for deciphering the lunar geological history.Conventional thick-walled drill bits are inherently limited in obtaining deep lunar regolith samples,whereas thin-walled coring bits offer a promising solution for lunar deep drilling.To support future lunar deep exploration missions,this study systematically investigates the failure mechanisms of lunar regolith induced by thin-walled drilling tools.Firstly,five thin-walled bit configurations were designed and evaluated based on drilling load,coring efficiency,and disturbance minimization,with Bit D demonstrating optimal overall performance.And the interaction mechanisms between differently configured coring bits and large-particle lunar regolith were elucidated.Coring experiments under critical drilling parameters revealed an operational window for the feed-to-rotation ratio(FRR of 2.0–2.5),effectively balancing drilling load and core recovery rate.Furthermore,a novel theoretical framework was developed to characterize dynamic drilling load parameters,supported by experimental validation.Based on these findings,practical strategies are proposed to mitigate drilling-induced disturbances,including parameter optimization and bit structural improvements.This research could provide valuable insights for designing advanced lunar deep drilling tools and developing drilling procedures.展开更多
文摘During the construction of Mengyejing Potassium Salt Drilling Project in southwest Yunnan, according to the previous construction experience and the formation situation, improve the drilling efficiency and heart rate. During the construction, we adopt new drilling technology and newly developed coring equipment, and the drilling efficiency was increased by 30% on average. The heart rate increased by about 10%-20%.
基金supported by the National Natural Science Foundation of China(Nos.52225403,52434004,and 52404365)the National Key Research and Development Program of China(No.2023YFF0615404)the Scientific Instrument Developing Project of Shenzhen University.
文摘Acquiring pristine deep lunar regolith cores with appropriate drilling tools is crucial for deciphering the lunar geological history.Conventional thick-walled drill bits are inherently limited in obtaining deep lunar regolith samples,whereas thin-walled coring bits offer a promising solution for lunar deep drilling.To support future lunar deep exploration missions,this study systematically investigates the failure mechanisms of lunar regolith induced by thin-walled drilling tools.Firstly,five thin-walled bit configurations were designed and evaluated based on drilling load,coring efficiency,and disturbance minimization,with Bit D demonstrating optimal overall performance.And the interaction mechanisms between differently configured coring bits and large-particle lunar regolith were elucidated.Coring experiments under critical drilling parameters revealed an operational window for the feed-to-rotation ratio(FRR of 2.0–2.5),effectively balancing drilling load and core recovery rate.Furthermore,a novel theoretical framework was developed to characterize dynamic drilling load parameters,supported by experimental validation.Based on these findings,practical strategies are proposed to mitigate drilling-induced disturbances,including parameter optimization and bit structural improvements.This research could provide valuable insights for designing advanced lunar deep drilling tools and developing drilling procedures.
