Chinese culture has a long history. Native culture, as an important part of China's traditional culture heritage, is rich in variety. In characteristic towns, native culture has strong local characteristics, and i...Chinese culture has a long history. Native culture, as an important part of China's traditional culture heritage, is rich in variety. In characteristic towns, native culture has strong local characteristics, and its protection and heritage has great value. This paper aimed to inherit traditional culture, protect the local characteristics of the towns, endow the town landscape with a unique cultural value, enhance people's cultural cohesion and identity of local culture and create characteristic towns with strong cultural characteristics.展开更多
This study,based on the theory of Locality,systematically examines the functional transformation of ancient Chinese lion-shaped lamps from the burial context to daily living scenes.By sorting out the evolution of thei...This study,based on the theory of Locality,systematically examines the functional transformation of ancient Chinese lion-shaped lamps from the burial context to daily living scenes.By sorting out the evolution of their shapes,decorations and application scenarios,it reveals how these lamps transformed from funerary"ever-burning lamps"into daily lighting utensils and accomplished the creative transformation from foreign cultural symbols to a model of local artifact creation.Combining textual research and physical analysis,this study proposes that the localization process of lion-shaped lamps is a dynamic adaptation in a specific temporal and spatial context through the integration of the local environment,symbolic expression and functional expansion,which realizes the innovation of functions and the re-endowment of symbolic meanings,reflecting the wisdom of the Chinese culture in digesting foreign cultures and its ability of reconstruction.This paper provides a new perspective for the design of traditional artifacts,and also offers a historical reference for the contemporary cross-cultural design practice in the era of globalization.展开更多
This work is about the development of a super low noise amplifier with minimum power consumption and high gain for several wireless applications.The amplifier operates at frequency bands of 0.9-2.4 GHz and can be used...This work is about the development of a super low noise amplifier with minimum power consumption and high gain for several wireless applications.The amplifier operates at frequency bands of 0.9-2.4 GHz and can be used in many applications like Wireless local area network(WLAN),WiFi,Bluetooth,ZigBee and Global System for mobile communications(GSM).This new design can be employed for the IEEE 802.15.4 standard in industrial,scientific and medical(ISM) Band.The enhancement mode pseudomorphic high electron mobility transistor PHEMT is used here due to its high linearity,better performance and less noisy operation.The common source inductive degeneration method is employed here to enhance the gain of amplifier.The amplifier produces a gain of more than 17 dB and noise figure of about 0.5 dB.The lower values of S11 and S22 reflect the accuracy of impedance matching network placed at the input and output sides of amplifier.Agilent Advance Design System(ADS) is used for the design and simulation purpose.Further the layout of design is developed on the FR4 substrate.展开更多
A local design scheme for origami energy dissipation braces was proposed by combining local Miura units at both ends and a straight segment in the middle.This design was implemented to address the issue of uneven axia...A local design scheme for origami energy dissipation braces was proposed by combining local Miura units at both ends and a straight segment in the middle.This design was implemented to address the issue of uneven axial stiffness observed in global origami braces.Globally and locally designed origami braces were simulated and compared under cyclic loading to validate the advantages of the proposed design scheme in terms of hysteretic properties.Additionally,an analysis was conducted on the designed braces with varying straight segment lengths,geometric angles,and origami plate thicknesses for comparison.Results indicate that the local design significantly increases the tensile bearing load,enhances the anti-buckling capability,and improves the energy dissipation performance compared to the global design.The positive impact on bearing capacity and energy dissipation performance was observed with increased straight segment length,geometric angles,and origami plate thickness.However,excessively large parameter values result in brace buckling under compression,diminishing energy dissipation capacity.展开更多
Although dielectric ceramic capacitors possess attractive properties for high-power energy storage,their pronounced electrostriction effect and high brittleness are conducive to easy initiation and propagation of crac...Although dielectric ceramic capacitors possess attractive properties for high-power energy storage,their pronounced electrostriction effect and high brittleness are conducive to easy initiation and propagation of cracks that significantly deteriorate electrical reliability and lifetime of capacitors in practical applications.Herein,a new strategy for designing relaxor ferroelectric ceramics with K_(0.5)Na_(0.5)NbO_(3)-core/SiO_(2)-shell structured grains was proposed to simultaneously reduce the electric-field-induced strain and enhance the mechanical strength of the ceramics.The simulation and experiment declared that the bending strength and compression strength of the core-shell structured ceramic were shown to increase by more than 50% over those of the uncoated sample.Meanwhile,the electric-field-induced strain was reduced by almost half after adding the SiO_(2) coating.The suppressed electrical deformation and enhanced mechanical strength could alleviate the probability of generation of cracks and prevent their propagation,thus remarkably improving breakdown strength and fatigue endurance of the ceramics.As a result,an ultra-high breakdown strength of 425 kV cm^(-1) and excellent recoverable energy storage density(Wrec~4.64 J cm^(-3))were achieved in the core-shell structured sample.More importantly,the unique structure could enhance the cycling stability of the ceramic(Wrec variation<±2% after 105 cycles).Thus,mechanical performance optimization via grain structure engineering offers a new paradigm for improving electrical breakdown strength and fatigue endurance of dielectric ceramic capacitors.展开更多
基金Sponsored by Graduate Innovation Fund of Jiangxi Normal University(YJS2017044)
文摘Chinese culture has a long history. Native culture, as an important part of China's traditional culture heritage, is rich in variety. In characteristic towns, native culture has strong local characteristics, and its protection and heritage has great value. This paper aimed to inherit traditional culture, protect the local characteristics of the towns, endow the town landscape with a unique cultural value, enhance people's cultural cohesion and identity of local culture and create characteristic towns with strong cultural characteristics.
文摘This study,based on the theory of Locality,systematically examines the functional transformation of ancient Chinese lion-shaped lamps from the burial context to daily living scenes.By sorting out the evolution of their shapes,decorations and application scenarios,it reveals how these lamps transformed from funerary"ever-burning lamps"into daily lighting utensils and accomplished the creative transformation from foreign cultural symbols to a model of local artifact creation.Combining textual research and physical analysis,this study proposes that the localization process of lion-shaped lamps is a dynamic adaptation in a specific temporal and spatial context through the integration of the local environment,symbolic expression and functional expansion,which realizes the innovation of functions and the re-endowment of symbolic meanings,reflecting the wisdom of the Chinese culture in digesting foreign cultures and its ability of reconstruction.This paper provides a new perspective for the design of traditional artifacts,and also offers a historical reference for the contemporary cross-cultural design practice in the era of globalization.
基金supported by the National Natural Science Foundation of China(Grant no. 61202399,61571063)
文摘This work is about the development of a super low noise amplifier with minimum power consumption and high gain for several wireless applications.The amplifier operates at frequency bands of 0.9-2.4 GHz and can be used in many applications like Wireless local area network(WLAN),WiFi,Bluetooth,ZigBee and Global System for mobile communications(GSM).This new design can be employed for the IEEE 802.15.4 standard in industrial,scientific and medical(ISM) Band.The enhancement mode pseudomorphic high electron mobility transistor PHEMT is used here due to its high linearity,better performance and less noisy operation.The common source inductive degeneration method is employed here to enhance the gain of amplifier.The amplifier produces a gain of more than 17 dB and noise figure of about 0.5 dB.The lower values of S11 and S22 reflect the accuracy of impedance matching network placed at the input and output sides of amplifier.Agilent Advance Design System(ADS) is used for the design and simulation purpose.Further the layout of design is developed on the FR4 substrate.
基金supported by the National Natural Science Foundation of China(Grant Nos.U1937202 and 52008064)the Innovation Support Plan-International Cooperation Project(BZ2022049)+1 种基金the Special Foundation for Central Guidance of Local Science and Technology of Shenzhen,China(Grant No.2021Szvup027)The first author acknowledges the scholarship(financial support)received from the China Scholarship Council(202106090085).
文摘A local design scheme for origami energy dissipation braces was proposed by combining local Miura units at both ends and a straight segment in the middle.This design was implemented to address the issue of uneven axial stiffness observed in global origami braces.Globally and locally designed origami braces were simulated and compared under cyclic loading to validate the advantages of the proposed design scheme in terms of hysteretic properties.Additionally,an analysis was conducted on the designed braces with varying straight segment lengths,geometric angles,and origami plate thicknesses for comparison.Results indicate that the local design significantly increases the tensile bearing load,enhances the anti-buckling capability,and improves the energy dissipation performance compared to the global design.The positive impact on bearing capacity and energy dissipation performance was observed with increased straight segment length,geometric angles,and origami plate thickness.However,excessively large parameter values result in brace buckling under compression,diminishing energy dissipation capacity.
基金This work was supported by the National Natural Science Foundation of China(grants nos.52072150,51972146,and 51772175)the China Association for Science and Technology(Young Elite Scientists Sponsorship Program)the State Key Laboratory of New Ceramic and Fine Processing Tsinghua University(project no.KF202002).
文摘Although dielectric ceramic capacitors possess attractive properties for high-power energy storage,their pronounced electrostriction effect and high brittleness are conducive to easy initiation and propagation of cracks that significantly deteriorate electrical reliability and lifetime of capacitors in practical applications.Herein,a new strategy for designing relaxor ferroelectric ceramics with K_(0.5)Na_(0.5)NbO_(3)-core/SiO_(2)-shell structured grains was proposed to simultaneously reduce the electric-field-induced strain and enhance the mechanical strength of the ceramics.The simulation and experiment declared that the bending strength and compression strength of the core-shell structured ceramic were shown to increase by more than 50% over those of the uncoated sample.Meanwhile,the electric-field-induced strain was reduced by almost half after adding the SiO_(2) coating.The suppressed electrical deformation and enhanced mechanical strength could alleviate the probability of generation of cracks and prevent their propagation,thus remarkably improving breakdown strength and fatigue endurance of the ceramics.As a result,an ultra-high breakdown strength of 425 kV cm^(-1) and excellent recoverable energy storage density(Wrec~4.64 J cm^(-3))were achieved in the core-shell structured sample.More importantly,the unique structure could enhance the cycling stability of the ceramic(Wrec variation<±2% after 105 cycles).Thus,mechanical performance optimization via grain structure engineering offers a new paradigm for improving electrical breakdown strength and fatigue endurance of dielectric ceramic capacitors.
