Thermoelectric generators(TEGs)are renowned for powering deep space exploration due to their simple system structure,long-term stability,and vibration-less operation^([1-4]).However,the extensive commercial applicatio...Thermoelectric generators(TEGs)are renowned for powering deep space exploration due to their simple system structure,long-term stability,and vibration-less operation^([1-4]).However,the extensive commercial application of TEGs remains stagnant due to the challenges in designing reliable electrode contact inter-faces,especially the interface between thermoelectric interface materials(TEiMs)and thermoelectric conversion materials(TEcMs)^([5]).展开更多
For decades,the so-called Peking Man(Homo erectus pekinensis)at Zhoukoudian has been considered to be a hominin that engaged in the controlled production and management of fire.However,relatively recent analyses have ...For decades,the so-called Peking Man(Homo erectus pekinensis)at Zhoukoudian has been considered to be a hominin that engaged in the controlled production and management of fire.However,relatively recent analyses have cast doubt on this assertion.The most compelling reason for this doubt was the absence of siliceous aggregates in the Zhoukoudian deposits.This study presents evidence establishing the controlled use of fire by Homo erectus pekinensis through analyses of four soil samples sourced from Layers 4 and 6 at Zhoukoudian Locality 1.These results demonstrate that all four specimens contain siliceous aggregates as well as elemental carbon,and the potassium content of the insoluble residues of these specimens ranges between 1.21%and 2.94%.The analyses provide strong evidence of the in situ use of fire by Homo erectus pekinensis.展开更多
基金the Shenzhen Key Projects of Long-Term Support Plan(No.20200925164021002)Guangdong Provincial Key Laboratory Program(No.2021B1212040001)from the Department of Science and Technology of Guangdong Province.
文摘Thermoelectric generators(TEGs)are renowned for powering deep space exploration due to their simple system structure,long-term stability,and vibration-less operation^([1-4]).However,the extensive commercial application of TEGs remains stagnant due to the challenges in designing reliable electrode contact inter-faces,especially the interface between thermoelectric interface materials(TEiMs)and thermoelectric conversion materials(TEcMs)^([5]).
基金supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA05130202)was identified as a Major Basic Research Project of the Ministry of Science and Technology of China(2007FY110200)Support was also received from the State Administration of Work Safety
文摘For decades,the so-called Peking Man(Homo erectus pekinensis)at Zhoukoudian has been considered to be a hominin that engaged in the controlled production and management of fire.However,relatively recent analyses have cast doubt on this assertion.The most compelling reason for this doubt was the absence of siliceous aggregates in the Zhoukoudian deposits.This study presents evidence establishing the controlled use of fire by Homo erectus pekinensis through analyses of four soil samples sourced from Layers 4 and 6 at Zhoukoudian Locality 1.These results demonstrate that all four specimens contain siliceous aggregates as well as elemental carbon,and the potassium content of the insoluble residues of these specimens ranges between 1.21%and 2.94%.The analyses provide strong evidence of the in situ use of fire by Homo erectus pekinensis.
