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排序方式： 共有331条查询结果，搜索用时 15 毫秒
21.
The main geolocation technology currently used in COSPAS-SARSAT system is TDOA/FDOA or three-star TDOA, the principle is to determine the location of the signal source by using the difference in arrival time and frequency of the wireless signal between different receivers. Therefore, ground monitoring stations need to be equipped with more than two antenna receiving stations, and multiple satellites should be able to simultaneously relay the distress signal from the target source in order to ach... 相似文献
22.
Peizhou Li Xiangrong Cao Jingrui Li Bo Jiao Xun Hou Feng Hao Zhijun Ning Zuqiang Bian Jun Xi Liming Ding Zhaoxin Wu Hua Dong 《纳微快报(英文)》2023,(10):120-158
Perovskite solar cells(PSCs) have attracted aggressive attention in the photovoltaic field in light of the rapid increasing power conversion efficiency. However, their large-scale application and commercialization are limited by the toxicity issue of lead(Pb). Among all the lead-free perovskites, tin(Sn)-based perovskites have shown potential due to their low toxicity, ideal bandgap structure, high carrier mobility, and long hot carrier lifetime. Great progress of Sn-based PSCs has been realized... 相似文献
23.
Mingjie Wu Xiaohua Yang Xun Cui Ning Chen Lei Du Mohamed Cherif Fu-Kuo Chiang Yuren Wen Amir Hassanpour Fran?ois Vidal Sasha Omanovic Yingkui Yang Shuhui Sun Gaixia Zhang 《纳微快报(英文)》2023,(12):291-305
Regulating the local configuration of atomically dispersed transition-metal atom catalysts is the key to oxygen electrocatalysis performance enhancement.Unlike the previously reported singleatom or dual-atom configurations,we designed a new type of binary-atom catalyst,through engineering Fe-N4 electronic structure with adjacent Co-N2C2 and nitrogen-coordinated Co nanoclusters,as oxygen electrocatalysts.The resultant optimized electronic structure of the Fe-N 相似文献
24.
Xin Wan Hui Jiang Zhen Ye Hang Zhou Yimin Ma Xuanrui Miao Xun He Kequan Chen 《中国化学工程学报》2023,(9):165-172
As a low cost non-staple food resource,the high-viscosity paste and poor gel-forming ability of tapioca starch limit its industrial application.Herein,molasses hydrocolloids that is a by-product of the sugar refining process was applied as a blending modifier to reduce the viscosity of tapioca starch paste.The test results of paste and rheological properties show that molasses hydrocolloids exhibited a good physical viscosity-reducing effect on tapioca starch paste.The irregular network structur... 相似文献
25.
Xun Tao Fan Zhou Xinlei Yu Songling Guo Yunfei Gao Lu Ding Guangsuo Yu Zhenghua Dai Fuchen Wang 《中国化学工程学报》2023,(7):105-117
CO2 is an important component in the acid gas and it is necessary to study the effect of CO2 presence on the oxy-fuel combustion of H2S with particular focus on the formation of carbonyl sulfide(COS).The oxyfuel combustion of acid gas was conducted in a coaxial jet double channel burner.The distribution of flame temperature and products under stoichiometric condition along axial(R=0.0) and radial at about 3.0 mm(R=0.75) were analyzed,respectively.The Chemkin-Pro ... 相似文献
26.
The coal and biomass coupling power generation technology is considered as a promising technology for energy conservation and emission reduction. In this paper, a novel coal and biomass indirect coupling system is proposed based on the technology of biomass gasification and co-combustion of coal and gasification gas. For the sake of comparison, a coal and biomass direct coupling system is also introduced based on the technology of co-combustion of coal and biomass. The process of the direct and the indirect coupling system is simulated. The thermodynamic and economic performances of two systems are analyzed and compared. The simulation indicates that the thermodynamic performance of the indirect coupling system is slightly worse, but the economic performance is better than that of the direct coupling system. When the blending ratio of biomass is 20%, the energy and exergy efficiencies of the indirect coupling system are 42.70% and 41.14%, the internal rate of return (IRR) and discounted payback period (DPP) of the system are 25.68% and 8.56 years. The price fluctuation of fuels and products has a great influence on the economic performance of the indirect coupling system. The environmental impact analysis indicates that the indirect coupling system can inhibit the propagation of NOx and reduce the environmental cost. 相似文献
27.
PENG Ji hua 《中国有色金属学会会刊》2000,10(3)
1 ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｃｌａｓｓｏｆｏｒｔｈｏｒｈｏｍｂｉｃｔｉｔａｎｉｕｍａｌｕｍｉｎｉｄｅａｌｌｏｙｓｃｕｒｒｅｎｔｌｙａｐｐｅａｒｓｔｏｏｆｆｅｒｅｘｃｅｌｌｅｎｔｐｏｔｅｎｔｉａｌａｓａｅｒｏｓｐａｃｅａｎｄｅｌｅｖａｔｅｄｔｅｍｐｅｒａｔｕｒｅｓｔｒｕｃｔｕｒａｌｍａｔｅｒｉａｌｓｂｅｃａｕｓｅｏｆｔｈｅｉｒｌｏｗｄｅｎｓｉｔｙａｎｄｈｉｇｈｓｔｒｅｎｇｔｈ[1,2].ＴｈｅｃｏｎｖｅｎｔｉｏｎａｌＴｉ3ＡｌｂａｓｅｄａｌｌｏｙＴｉ24Ａｌ11Ｎｂｐｏｓｓｅｓｓｅｓｈｉｇｈｅｒｔｏｕｇ… 相似文献
28.
本文尝试了脉冲电源中性电解液移动式抛光不锈钢管外表面的方法 ,进行了直流与脉冲电流抛光对比实验 ,对表面质量和极间电场与流场进行了分析。 相似文献
30.