1.Introduction.The Ti6Al4V alloy is extensively utilized across various indus-trial sectors due to its favorable characteristics,such as lightweight design,high strength,and resistance to corrosion[1].In effort s to f...1.Introduction.The Ti6Al4V alloy is extensively utilized across various indus-trial sectors due to its favorable characteristics,such as lightweight design,high strength,and resistance to corrosion[1].In effort s to further reduce weight,functional elements like electric actuators can be substituted with intelligent materials like shape memory alloys(SMAs)[2,3].Among SMAs,NiTi alloy stands out for its sens-ing and actuation capabilities,significantly enhancing the safety and reliability of engineering structures[4,5].Integrating Ti6Al4V and NiTi alloys within a single component holds the potential to provide precise feedback on mechanical,thermal,or environmen-tal conditions[6,7].展开更多
Developing high-capacity and high-rate anodes is significant to engineering sodium-ion batteries with high energy density and high power density.Layered Na_(2)Ti_(3)O_(7)(NTO),with an open crystal structure,large theo...Developing high-capacity and high-rate anodes is significant to engineering sodium-ion batteries with high energy density and high power density.Layered Na_(2)Ti_(3)O_(7)(NTO),with an open crystal structure,large theoretical capacity,and low working potential,is recognized as one of the prospective anodes for sodium storage.Nevertheless,it suffers from sluggish sodiation kinetics and low(micro)structure stability triggered by a high Na+diffusion barrier and weak adhesion of[Ti_(3)O_(7)]slabs.Herein,the interlayered local structure of NTO is regulated to solve the above issues,in which parts of interlayered Na^(+) sites are substituted by H^(+)(Na_(2−x)H_(x)Ti_(3)O_(7)[NHTO]).Theoretical calculations prove that the NHTO offers lower activation energy for Na^(+)transports and low interlayer spacings with alleviated Na-Na repulsion and relatively flexible[Ti_(3)O_(7)]slabs to reduce fractural stress.In situ and ex situ characterizations of(micro)structure evolution reveal that NHTO goes through transformation between H-rich and Na-rich phases,resulting in high structure stability and microstructure integrity.The optimal NHTO anode delivers a high capacity of 190.6 mA h g^(−1) at 0.5 C after 300 cycles and a superior high-rate stability of 90.6 mA h g^(−1) at 50 C over 10,000 cycles at room temperature.Besides,it offers a capacity of 50.3 mA h g^(−1) after 1800 cycles at a low temperature of−20℃ and 195.7 mA h g^(−1) after 500 cycles at a high temperature of 40℃ at 0.5 C.The developed topologically interlayered local structure regulation strategy would raise the prospect of designing high-performance layered anodes.展开更多
The "Arctic" region,where the North Pole occupies the center of the Arctic Ocean,has been affecting the environmental variation of the Earth from geological time to the present.However,the seismic activities...The "Arctic" region,where the North Pole occupies the center of the Arctic Ocean,has been affecting the environmental variation of the Earth from geological time to the present.However,the seismic activities in the area are not adequately monitored.Therefore,by conducting long term monitoring of seismic phenomenon as sustainable parameters,our understanding of both the tectonic evolution of the Earth and the dynamic interaction between the cryosphere and geosphere in surface layers of the Earth will increase.In this paper,the association of the seismicity and structure of the Arctic region,particularly focused on Eurasian continent and surrounding oceans,and its relationship with regional evolution during the Earth’s history is studied.The target areas cover representative tectonic provinces in the Eurasian Arctic,such as the wide area of Siberia,Baikal Rift Zone.Far East Russia,Arctic Ocean together with Greenland and Northern Canada.Based on discussion including characteristics of seismicity,heterogeneous structure of the crust and upper mantle,tectonic history and recent dynamic features of the Earth’s surface in the Arctic are summarized.展开更多
This paper compares the results of calculating pore structure and graphing differential and integral pore size distribution by hand and computer, and presents that Lagrangian interpolation uesd by calculating pore str...This paper compares the results of calculating pore structure and graphing differential and integral pore size distribution by hand and computer, and presents that Lagrangian interpolation uesd by calculating pore structure is suitable and reliable.展开更多
Image coloring is an inherently uncertain and multimodal problem.By inputting a grayscale image into a coloring network,visually plausible colored photos can be generated.Conventional methods primarily rely on semanti...Image coloring is an inherently uncertain and multimodal problem.By inputting a grayscale image into a coloring network,visually plausible colored photos can be generated.Conventional methods primarily rely on semantic information for image colorization.These methods still suffer from color contamination and semantic confusion.This is largely due to the limited capacity of convolutional neural networks to learn deep semantic information inherent in images effectively.In this paper,we propose a network structure that addresses these limitations by leveraging multi-level semantic information classification and fusion.Additionally,we introduce a global semantic fusion network to combat the issues of color contamination.The proposed coloring encoder accurately extracts object-level semantic information from images.To further enhance visual plausibility,we employ a self-supervised adversarial training method.We train the network structure on various datasets with varying amounts of data and evaluate its performance using the ImageNet validation set and COCO validation set.Experimental results demonstrate that our proposed algorithm can generate more realistic images compared to previous approaches,showcasing its high generalization ability.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.52235006)the National Key Research and Development Program of China(Grant No.2022YFB4600500)+3 种基金the National Natural Science Foundation of China(Grant Nos.52025053 and 52105303)the Natural Science Foundation of Jilin Province(Grant No.20220101209JC)the Postdoctoral Fellow-ship Program of CPSF(Grant GZC20240587 and GZC20230944)the Graduate Innovation Fund of Jilin University(2024CX063).
文摘1.Introduction.The Ti6Al4V alloy is extensively utilized across various indus-trial sectors due to its favorable characteristics,such as lightweight design,high strength,and resistance to corrosion[1].In effort s to further reduce weight,functional elements like electric actuators can be substituted with intelligent materials like shape memory alloys(SMAs)[2,3].Among SMAs,NiTi alloy stands out for its sens-ing and actuation capabilities,significantly enhancing the safety and reliability of engineering structures[4,5].Integrating Ti6Al4V and NiTi alloys within a single component holds the potential to provide precise feedback on mechanical,thermal,or environmen-tal conditions[6,7].
基金National Natural Science Foundation of China(Grant No.52202282)Opening Project of the State Key Laboratory of High-Performance Ceramics and Superfine Microstructure(Grant No.SKL202209SIC)Natural Science Foundation of Tianjin City(Grant No.22JCYBJC00040).
文摘Developing high-capacity and high-rate anodes is significant to engineering sodium-ion batteries with high energy density and high power density.Layered Na_(2)Ti_(3)O_(7)(NTO),with an open crystal structure,large theoretical capacity,and low working potential,is recognized as one of the prospective anodes for sodium storage.Nevertheless,it suffers from sluggish sodiation kinetics and low(micro)structure stability triggered by a high Na+diffusion barrier and weak adhesion of[Ti_(3)O_(7)]slabs.Herein,the interlayered local structure of NTO is regulated to solve the above issues,in which parts of interlayered Na^(+) sites are substituted by H^(+)(Na_(2−x)H_(x)Ti_(3)O_(7)[NHTO]).Theoretical calculations prove that the NHTO offers lower activation energy for Na^(+)transports and low interlayer spacings with alleviated Na-Na repulsion and relatively flexible[Ti_(3)O_(7)]slabs to reduce fractural stress.In situ and ex situ characterizations of(micro)structure evolution reveal that NHTO goes through transformation between H-rich and Na-rich phases,resulting in high structure stability and microstructure integrity.The optimal NHTO anode delivers a high capacity of 190.6 mA h g^(−1) at 0.5 C after 300 cycles and a superior high-rate stability of 90.6 mA h g^(−1) at 50 C over 10,000 cycles at room temperature.Besides,it offers a capacity of 50.3 mA h g^(−1) after 1800 cycles at a low temperature of−20℃ and 195.7 mA h g^(−1) after 500 cycles at a high temperature of 40℃ at 0.5 C.The developed topologically interlayered local structure regulation strategy would raise the prospect of designing high-performance layered anodes.
基金supported by JSPS KAKENHI Grant Number 26241010(P.I.by Dr.Masaki Kanao)
文摘The "Arctic" region,where the North Pole occupies the center of the Arctic Ocean,has been affecting the environmental variation of the Earth from geological time to the present.However,the seismic activities in the area are not adequately monitored.Therefore,by conducting long term monitoring of seismic phenomenon as sustainable parameters,our understanding of both the tectonic evolution of the Earth and the dynamic interaction between the cryosphere and geosphere in surface layers of the Earth will increase.In this paper,the association of the seismicity and structure of the Arctic region,particularly focused on Eurasian continent and surrounding oceans,and its relationship with regional evolution during the Earth’s history is studied.The target areas cover representative tectonic provinces in the Eurasian Arctic,such as the wide area of Siberia,Baikal Rift Zone.Far East Russia,Arctic Ocean together with Greenland and Northern Canada.Based on discussion including characteristics of seismicity,heterogeneous structure of the crust and upper mantle,tectonic history and recent dynamic features of the Earth’s surface in the Arctic are summarized.
文摘This paper compares the results of calculating pore structure and graphing differential and integral pore size distribution by hand and computer, and presents that Lagrangian interpolation uesd by calculating pore structure is suitable and reliable.
基金supported by the Key Technologies R&D Program of Tianjin(Nos.24YFZCSN00030 and 24YFYSHZ00090)。
文摘Image coloring is an inherently uncertain and multimodal problem.By inputting a grayscale image into a coloring network,visually plausible colored photos can be generated.Conventional methods primarily rely on semantic information for image colorization.These methods still suffer from color contamination and semantic confusion.This is largely due to the limited capacity of convolutional neural networks to learn deep semantic information inherent in images effectively.In this paper,we propose a network structure that addresses these limitations by leveraging multi-level semantic information classification and fusion.Additionally,we introduce a global semantic fusion network to combat the issues of color contamination.The proposed coloring encoder accurately extracts object-level semantic information from images.To further enhance visual plausibility,we employ a self-supervised adversarial training method.We train the network structure on various datasets with varying amounts of data and evaluate its performance using the ImageNet validation set and COCO validation set.Experimental results demonstrate that our proposed algorithm can generate more realistic images compared to previous approaches,showcasing its high generalization ability.
