The synthesis of carbon supporter/nanoscale high-entropy alloys(HEAs)electromagnetic response composites by carbothermal shock method has been identified as an advanced strategy for the collaborative competition engin...The synthesis of carbon supporter/nanoscale high-entropy alloys(HEAs)electromagnetic response composites by carbothermal shock method has been identified as an advanced strategy for the collaborative competition engineering of conductive/dielectric genes.Electron migration modes within HEAs as manipulated by the electronegativity,valence electron configurations and molar proportions of constituent elements determine the steady state and efficiency of equivalent dipoles.Herein,enlightened by skin-like effect,a reformative carbothermal shock method using carbonized cellulose paper(CCP)as carbon supporter is used to preserve the oxygencontaining functional groups(O·)of carbonized cellulose fibers(CCF).Nucleation of HEAs and construction of emblematic shell-core CCF/HEAs heterointerfaces are inextricably linked to carbon metabolism induced by O·.Meanwhile,the electron migration mode of switchable electronrich sites promotes the orientation polarization of anisotropic equivalent dipoles.By virtue of the reinforcement strategy,CCP/HEAs composite prepared by 35%molar ratio of Mn element(CCP/HEAs-Mn_(2.15))achieves efficient electromagnetic wave(EMW)absorption of−51.35 dB at an ultra-thin thickness of 1.03 mm.The mechanisms of the resulting dielectric properties of HEAs-based EMW absorbing materials are elucidated by combining theoretical calculations with experimental characterizations,which provide theoretical bases and feasible strategies for the simulation and practical application of electromagnetic functional devices(e.g.,ultra-wideband bandpass filter).展开更多
The first section of this essay deals with an iconographical analysis of Lavinia Fontana’s(1552-1614)Prudence or Personification of Wisdom of 1590,while the second part provides an iconological interpretation,demonst...The first section of this essay deals with an iconographical analysis of Lavinia Fontana’s(1552-1614)Prudence or Personification of Wisdom of 1590,while the second part provides an iconological interpretation,demonstrating Fontana’s application of emblematic significations.This painting is presently on display at the Galerie Maison d’Art in Monte Carlo.At this time there is lack of knowledge about the patronage of this commission,except from the art gallery’s records showing that it acquired the painting from a private collection in New York.展开更多
Jan Haicksz Steen （1626-1679）, a Dutch actor, poet and painter, engaged the viewer with various innuendos and double entendres in his paintings about Woman at Her Toilet. Decoding the conceits introduces the viewer ...Jan Haicksz Steen （1626-1679）, a Dutch actor, poet and painter, engaged the viewer with various innuendos and double entendres in his paintings about Woman at Her Toilet. Decoding the conceits introduces the viewer to Dutch artistic astuteness and popular culture. Steen drew the observer into his picture plane through a series of emblematic vignettes. Although he raised questions about cultural mores, morality, and religiosity, none are judgmental. On the contrary, it is the viewer who might or might not articulate a moral judgment according to personal experiences. For Steen, the imagery, filled with complex conceits, is an artistic visual representation to delight the eyes, tantalize the senses, and maybe even spark the intellect.展开更多
基金Financial support from the National Natural Science Foundation of China(52372289,52102368,52231007,12327804,T2321003,22088101,22178037 and U22A20424)Regional Joint Fund for Basic Research and Applied Basic Research of Guangdong Province(No.2020A1515110905)+1 种基金Guangdong Special Fund for key Areas(20237DZX3042)Shenzhen Stable Support Project,Liaoning Revitalization Talents Program(XLYC2002114)are highly appreciated.
文摘The synthesis of carbon supporter/nanoscale high-entropy alloys(HEAs)electromagnetic response composites by carbothermal shock method has been identified as an advanced strategy for the collaborative competition engineering of conductive/dielectric genes.Electron migration modes within HEAs as manipulated by the electronegativity,valence electron configurations and molar proportions of constituent elements determine the steady state and efficiency of equivalent dipoles.Herein,enlightened by skin-like effect,a reformative carbothermal shock method using carbonized cellulose paper(CCP)as carbon supporter is used to preserve the oxygencontaining functional groups(O·)of carbonized cellulose fibers(CCF).Nucleation of HEAs and construction of emblematic shell-core CCF/HEAs heterointerfaces are inextricably linked to carbon metabolism induced by O·.Meanwhile,the electron migration mode of switchable electronrich sites promotes the orientation polarization of anisotropic equivalent dipoles.By virtue of the reinforcement strategy,CCP/HEAs composite prepared by 35%molar ratio of Mn element(CCP/HEAs-Mn_(2.15))achieves efficient electromagnetic wave(EMW)absorption of−51.35 dB at an ultra-thin thickness of 1.03 mm.The mechanisms of the resulting dielectric properties of HEAs-based EMW absorbing materials are elucidated by combining theoretical calculations with experimental characterizations,which provide theoretical bases and feasible strategies for the simulation and practical application of electromagnetic functional devices(e.g.,ultra-wideband bandpass filter).
文摘The first section of this essay deals with an iconographical analysis of Lavinia Fontana’s(1552-1614)Prudence or Personification of Wisdom of 1590,while the second part provides an iconological interpretation,demonstrating Fontana’s application of emblematic significations.This painting is presently on display at the Galerie Maison d’Art in Monte Carlo.At this time there is lack of knowledge about the patronage of this commission,except from the art gallery’s records showing that it acquired the painting from a private collection in New York.
文摘Jan Haicksz Steen （1626-1679）, a Dutch actor, poet and painter, engaged the viewer with various innuendos and double entendres in his paintings about Woman at Her Toilet. Decoding the conceits introduces the viewer to Dutch artistic astuteness and popular culture. Steen drew the observer into his picture plane through a series of emblematic vignettes. Although he raised questions about cultural mores, morality, and religiosity, none are judgmental. On the contrary, it is the viewer who might or might not articulate a moral judgment according to personal experiences. For Steen, the imagery, filled with complex conceits, is an artistic visual representation to delight the eyes, tantalize the senses, and maybe even spark the intellect.
