针对概率犹豫模糊环境下属性权重已知的多属性群决策问题,考虑概率犹豫模糊集的犹豫度,提出基于改进距离测度的概率犹豫模糊多属性群决策新方法。结合传统的概率犹豫模糊距离测度,通过信息融合定义融入犹豫度的概率犹豫模糊距离测度:汉...针对概率犹豫模糊环境下属性权重已知的多属性群决策问题,考虑概率犹豫模糊集的犹豫度,提出基于改进距离测度的概率犹豫模糊多属性群决策新方法。结合传统的概率犹豫模糊距离测度,通过信息融合定义融入犹豫度的概率犹豫模糊距离测度:汉明距离、欧氏距离、广义欧氏距离,并通过组合系数来实现理论扩张和融合优化,同时研究距离测度的大小关系及参数单调性。将融入犹豫度的距离测度与基于理想解相似度的逼近理想解排序法(technique for order preference by similarity to ideal solution,TOPSIS)结合构建多属性群决策新方法,采用公司选址案例进行决策选择,通过参数分析和决策比较来揭示所建方法的有效性。相关研究系统深化概率犹豫模糊距离测度,并丰富了多属性群决策方法。展开更多
BODIPY has been considered a potential scaffold because of their neutral total charge, sharp absorption,and emission with high fluorescence quantum yield. However, the drawback of emission wavelength at less than 600 ...BODIPY has been considered a potential scaffold because of their neutral total charge, sharp absorption,and emission with high fluorescence quantum yield. However, the drawback of emission wavelength at less than 600 nm and hydrophobicity limit its application. One of the extremely interesting properties of BODIPY is that small modifications to their structures could be able to tune their properties, mainly including the absorption/emission wavelength and the hydrophilicity. This review focuses on the modification at different positions of BODIPY to improve the water-solubility and emission wavelength that describe their spectral, photophysical properties and applicability, which is helpful for the researchers to rationally design BODIPY dyes to adapt a wide range of applications.展开更多
As a common practice in agricultural system,straw return has been reported to release a large number of trace gases and attractedmuch attention.However,the role of straw return in toluene emission remains poorly under...As a common practice in agricultural system,straw return has been reported to release a large number of trace gases and attractedmuch attention.However,the role of straw return in toluene emission remains poorly understood.In this study we measured the emissions of toluene as well as other 50 volatile organic compounds(VOCs)from wheat straw return for 66 days under flooded and non-flooded conditions,respectively.The results showed that substantial toluene was released from the returned wheat straw particularly under flooded condition,and primarily derived from the secondary product.Toluene emissions from the returned wheat straw were 36.8 and 8.45 mg C/kg,sharing 28.0%and 8.6%of total VOCs released,and over 90% of toluene emissions occurred between days 24-56 and 0-17 under flooded and non-flooded conditions,respectively.The emission rates of toluene were relatively high but decreased sharply at the beginning 2 days,and then was steady until 24 days under the two moisture conditions.After the initial decrease these rose again to form one“peak emission window”between days 24-56 under flooded condition,while these were still very low and steady until the end under non-flooded condition.The toluene emission rates significantly positively correlated with microbial biomass C under flooded condition,but negatively associated with bacteria and fungus number,microbial biomass C,and CO_(2) flux under non-flooded condition,suggesting that microorganism might play an important role in toluene emissions from wheat straw return.A rough estimate indicated that straw return might be important for biogenic toluene.展开更多
The widespread applications of aggregation-induced emission luminogens(AIEgens)inspire the creation of AIEgens with novel structures and functionalities.In this work,we focused on the direct and efficient synthesis of...The widespread applications of aggregation-induced emission luminogens(AIEgens)inspire the creation of AIEgens with novel structures and functionalities.In this work,we focused on the direct and efficient synthesis of a new type of AIEgens,imidazo[1,5-a]pyridicne derivatives,via iodine mediated cascade oxidative Csp^(2)–H or Csp–H amination route from phenylacetylene or styrenes under mild conditions.The resulted compounds showed excellent AIE characteristics with tunable maximum emissions,attractive bioimaging performance,and potential anti-inflammatory activity,which exert broad application prospects in material,biology,medicine,and other relevant areas.展开更多
In this paper,we propose a new class of non-self mappings called p-proximalα-η-β-quasi contraction,and introduce the concepts ofα-proximal admissible mapping with respect toηand(α,d)regular mapping with respect...In this paper,we propose a new class of non-self mappings called p-proximalα-η-β-quasi contraction,and introduce the concepts ofα-proximal admissible mapping with respect toηand(α,d)regular mapping with respect toη.Based on these new notions,we study the existence and uniqueness of best proximity point for this kind of new contractions in metric spaces with w;-distance and obtain a new theorem,which generalize and complement the results in[Ayari,M.I.et al.Fixed Point Theory Appl.,2017,2017:16]and[Ayari,M.I.et al.Fixed Point Theory Appl.,2019,2019:7].We give an example to show the validity of our main result.Moreover,we obtain several consequences concerning about best proximity point and common fixed point results for two mappings,and we present an application of a corollary to discuss the solutions to a class of systems of Volterra type integral equations.展开更多
One new species and one new record species of Sphaerolaimus are described.Sphaerolaimus longispiculatus sp.nov.is characterized by body length 2213–2470µm,amphideal fovea 12%–16%corresponding body diameters in ...One new species and one new record species of Sphaerolaimus are described.Sphaerolaimus longispiculatus sp.nov.is characterized by body length 2213–2470µm,amphideal fovea 12%–16%corresponding body diameters in males and 9%–10%corresponding body diameters in females,long slender spicules 2.8–3.8 cloacal body diameters,eight small papilliform precloacal supplements,gubernaculum without apophysis,and tail conico-cylindrical,2.5–3.7 cloacal/anal body diameters long.Sphaerolaimus gracilis is recorded from the first time in the mangroves wetlands,it can be distinguished from the original desceiption by longer spicules(66–71µm vs 56µm)and wider body(a=20.1–21.4 vs 25).展开更多
INTRODUCTION Large-scale computing power has become pivotal in enhancing national core competitiveness as the new quality productive force in the digital economy era.With the rapid advancement of artificial general in...INTRODUCTION Large-scale computing power has become pivotal in enhancing national core competitiveness as the new quality productive force in the digital economy era.With the rapid advancement of artificial general intelligence,the computing power industry is experiencing exponential growth.Projections suggest that China’s total computing capacity will exceed 300 exaflops per second(EFLOPS)by 2025,with associated electricity consumption accounting for approximately 5%of national power demand.展开更多
Introducing liquid-crystalline small-molecule donors(SMDs)into binary systems based on the strong intermolecular interactions of SMDs is a facile and effective strategy to tune the active layer morphology and improve ...Introducing liquid-crystalline small-molecule donors(SMDs)into binary systems based on the strong intermolecular interactions of SMDs is a facile and effective strategy to tune the active layer morphology and improve the performance of organic solar cells(OSCs).Contrary to conventional understanding,this research proposes a new strategy for ternary OSCs implicating that"weakly crystalline materials can also optimize the morphology of the active layer and improve the OSCs performance".Herein,we designed and synthesized two liquid-crystalline SMDs,Z1 and Z2,based on benzodifuran(BDF)units.The amorphous Z2-incorporated ternary devices present an unexpectedly improved power conversion efficiency(PCE)>18%with good stability.By contrast,the highly ordered Z1-based ternary devices possess a significantly depressed efficiency.Multiple characterizations reveal that the Z2-based ternary blend films possess improved miscibility and efficient charge transport.This novel strategy for the selection of the third component is significant for the fabrication of high-efficiency ternary OSCs.展开更多
Capacitive deionization can alleviate water shortage and water environmental pollution, but performances are greatly determined by the electrochemical and desalination properties of its electrode materials. In this wo...Capacitive deionization can alleviate water shortage and water environmental pollution, but performances are greatly determined by the electrochemical and desalination properties of its electrode materials. In this work, B and N co-doped porous carbon with micro-mesoporous structures is derived from sodium alginate by a carbonization, activation, and hydrothermal doping process, which exhibits large specific surface area (2587 m^(2)·g^(‒1)) and high specific capacitance (190.7 F·g^(‒1)) for adsorption of salt ions and heavy metal ions. Furthermore, the materials provide a desalination capacity of 26.9 mg·g−1 at 1.2 V in 500 mg·L^(‒1) NaCl solution as well as a high removal capacity (239.6 mg·g^(‒1)) and adsorption rate (7.99 mg·g^(‒1)·min^(‒1)) for Pb2+ with an excellent cycle stability. This work can pave the way to design low-cost porous carbon with high-performances for removal of salt ions and heavy metal ions.展开更多
The sp2 carbon-conjugated covalent organic frameworks(COFs)with fully π-conjugated lattice and high chemical stability are promising heterogeneous photocatalysts.Herein,we report the design and synthesis of a novel p...The sp2 carbon-conjugated covalent organic frameworks(COFs)with fully π-conjugated lattice and high chemical stability are promising heterogeneous photocatalysts.Herein,we report the design and synthesis of a novel palladium(Pd)porphyrin-based sp2 carbon-conjugated COF(PdPor-sp2c-COF)with an eclipsed AA stacking 2D structure.Interestingly,PdPor-sp2c-COF showed high crystallinity,good chemical stability,and a broad absorp-tion of visible light.Moreover,compared to our previously reported metal-free Por-sp2c-COF,PdPor-sp2c-COF displays an improved photocatalytic performance in the selective aerobic oxidation of sulfides under green light irradiation.The systematic mechanistic studies testified that the enhanced photocatalytic activity can be ascribed to promoting energy transfer pathway over PdPor-sp2c-COF.Our study clearly demonstrates that it is favorable to promote the energy transfer pathway in sp2 carbon-conjugated COFs by using metalloporphyrin-based molecular building blocks.This work will inspire us to design and synthesize novel photocatalysts based on COFs for the selective aerobic oxidation.展开更多
文摘针对概率犹豫模糊环境下属性权重已知的多属性群决策问题,考虑概率犹豫模糊集的犹豫度,提出基于改进距离测度的概率犹豫模糊多属性群决策新方法。结合传统的概率犹豫模糊距离测度,通过信息融合定义融入犹豫度的概率犹豫模糊距离测度:汉明距离、欧氏距离、广义欧氏距离,并通过组合系数来实现理论扩张和融合优化,同时研究距离测度的大小关系及参数单调性。将融入犹豫度的距离测度与基于理想解相似度的逼近理想解排序法(technique for order preference by similarity to ideal solution,TOPSIS)结合构建多属性群决策新方法,采用公司选址案例进行决策选择,通过参数分析和决策比较来揭示所建方法的有效性。相关研究系统深化概率犹豫模糊距离测度,并丰富了多属性群决策方法。
基金the National Natural Science Foundation of China (Nos. 21572177, 21673173 and 21807087)China Postdoctoral Science Foundation (No. 2017M623225)+3 种基金Key Research and Development Program of Shaanxi (No. 2019KWZ-07)the Key Science and Technology Innovation Team of Shaanxi Province (No. 2017KCT-37)Natural Science Basic Research Plan in Shaanxi Province of China (No. 2018JQ3038)the Xi’an City Science and Technology Project (No. 2017085CG/RC048 (XBDX004))
文摘BODIPY has been considered a potential scaffold because of their neutral total charge, sharp absorption,and emission with high fluorescence quantum yield. However, the drawback of emission wavelength at less than 600 nm and hydrophobicity limit its application. One of the extremely interesting properties of BODIPY is that small modifications to their structures could be able to tune their properties, mainly including the absorption/emission wavelength and the hydrophilicity. This review focuses on the modification at different positions of BODIPY to improve the water-solubility and emission wavelength that describe their spectral, photophysical properties and applicability, which is helpful for the researchers to rationally design BODIPY dyes to adapt a wide range of applications.
基金Financial supports from Natural Science Foundation of China(Nos. 41273095 and 40203011)Natural Science Foundation of Anhui Province(No. 2008085MD111)the University Synergy Innovation Program of Anhui Province(No. GXXT-2020075)
文摘As a common practice in agricultural system,straw return has been reported to release a large number of trace gases and attractedmuch attention.However,the role of straw return in toluene emission remains poorly understood.In this study we measured the emissions of toluene as well as other 50 volatile organic compounds(VOCs)from wheat straw return for 66 days under flooded and non-flooded conditions,respectively.The results showed that substantial toluene was released from the returned wheat straw particularly under flooded condition,and primarily derived from the secondary product.Toluene emissions from the returned wheat straw were 36.8 and 8.45 mg C/kg,sharing 28.0%and 8.6%of total VOCs released,and over 90% of toluene emissions occurred between days 24-56 and 0-17 under flooded and non-flooded conditions,respectively.The emission rates of toluene were relatively high but decreased sharply at the beginning 2 days,and then was steady until 24 days under the two moisture conditions.After the initial decrease these rose again to form one“peak emission window”between days 24-56 under flooded condition,while these were still very low and steady until the end under non-flooded condition.The toluene emission rates significantly positively correlated with microbial biomass C under flooded condition,but negatively associated with bacteria and fungus number,microbial biomass C,and CO_(2) flux under non-flooded condition,suggesting that microorganism might play an important role in toluene emissions from wheat straw return.A rough estimate indicated that straw return might be important for biogenic toluene.
基金financially supported by the National Natural Science Foundation of China(Nos.22077099,21807087and 21673173)Key Research and Development Plan in Shaanxi Province of China(No.2019KWZ-07)+2 种基金the Technology Innovation Leading Program of Shaanxi(No.2020TG-031)the Xi’an CityScience and Technology Project(Nos.2019218214GXRC018CG019-GXYD18.4 and 2020KJRC0115)the support from COVID-19 Prophylaxis and Treatment Emergency Research Special Projects of Northwest University。
文摘The widespread applications of aggregation-induced emission luminogens(AIEgens)inspire the creation of AIEgens with novel structures and functionalities.In this work,we focused on the direct and efficient synthesis of a new type of AIEgens,imidazo[1,5-a]pyridicne derivatives,via iodine mediated cascade oxidative Csp^(2)–H or Csp–H amination route from phenylacetylene or styrenes under mild conditions.The resulted compounds showed excellent AIE characteristics with tunable maximum emissions,attractive bioimaging performance,and potential anti-inflammatory activity,which exert broad application prospects in material,biology,medicine,and other relevant areas.
基金Supported by the National Natural Science Foundation of China(Grant Nos.12161056,11701259,11771198)the Natural Science Foundation of Jiangxi Province(Grant No.20202BAB201001)。
文摘In this paper,we propose a new class of non-self mappings called p-proximalα-η-β-quasi contraction,and introduce the concepts ofα-proximal admissible mapping with respect toηand(α,d)regular mapping with respect toη.Based on these new notions,we study the existence and uniqueness of best proximity point for this kind of new contractions in metric spaces with w;-distance and obtain a new theorem,which generalize and complement the results in[Ayari,M.I.et al.Fixed Point Theory Appl.,2017,2017:16]and[Ayari,M.I.et al.Fixed Point Theory Appl.,2019,2019:7].We give an example to show the validity of our main result.Moreover,we obtain several consequences concerning about best proximity point and common fixed point results for two mappings,and we present an application of a corollary to discuss the solutions to a class of systems of Volterra type integral equations.
基金Supported by the National Natural Science Foundation of China(No.31772416)the Natural Science Foundation of Fujian Province(No.2017J01450)。
文摘One new species and one new record species of Sphaerolaimus are described.Sphaerolaimus longispiculatus sp.nov.is characterized by body length 2213–2470µm,amphideal fovea 12%–16%corresponding body diameters in males and 9%–10%corresponding body diameters in females,long slender spicules 2.8–3.8 cloacal body diameters,eight small papilliform precloacal supplements,gubernaculum without apophysis,and tail conico-cylindrical,2.5–3.7 cloacal/anal body diameters long.Sphaerolaimus gracilis is recorded from the first time in the mangroves wetlands,it can be distinguished from the original desceiption by longer spicules(66–71µm vs 56µm)and wider body(a=20.1–21.4 vs 25).
基金supported by China University of Petroleum(Beijing)project no.2462023YJRC009State Grid Corporation Technology project no.5700202416234A-1-1-ZN.
文摘INTRODUCTION Large-scale computing power has become pivotal in enhancing national core competitiveness as the new quality productive force in the digital economy era.With the rapid advancement of artificial general intelligence,the computing power industry is experiencing exponential growth.Projections suggest that China’s total computing capacity will exceed 300 exaflops per second(EFLOPS)by 2025,with associated electricity consumption accounting for approximately 5%of national power demand.
基金the Ministry of Science and Technology of China(2017YFA0204504)the National Natural Science Foundation of China(51873221,52073292,51673207,21774003,and 51373183)+2 种基金Chinese Academy of Sciences and Dutch Research Project(1A111KYSB20190072)Beijing Municipal Science&Technology Commission(Z181100004418012)Beijing Natural Science Foundation(2212032).
文摘Introducing liquid-crystalline small-molecule donors(SMDs)into binary systems based on the strong intermolecular interactions of SMDs is a facile and effective strategy to tune the active layer morphology and improve the performance of organic solar cells(OSCs).Contrary to conventional understanding,this research proposes a new strategy for ternary OSCs implicating that"weakly crystalline materials can also optimize the morphology of the active layer and improve the OSCs performance".Herein,we designed and synthesized two liquid-crystalline SMDs,Z1 and Z2,based on benzodifuran(BDF)units.The amorphous Z2-incorporated ternary devices present an unexpectedly improved power conversion efficiency(PCE)>18%with good stability.By contrast,the highly ordered Z1-based ternary devices possess a significantly depressed efficiency.Multiple characterizations reveal that the Z2-based ternary blend films possess improved miscibility and efficient charge transport.This novel strategy for the selection of the third component is significant for the fabrication of high-efficiency ternary OSCs.
基金partially supported by the National Natural Science Foundation of China(Grant Nos.51472174,61604086,and 21776147)the Shandong Province Natural Science Foundation(Grant Nos.ZR2018BB066,ZR2021YQ32,and ZR2022QB164)the Taishan Scholar Project of Shandong Province(Grant No.tsqn201909117)。
文摘Capacitive deionization can alleviate water shortage and water environmental pollution, but performances are greatly determined by the electrochemical and desalination properties of its electrode materials. In this work, B and N co-doped porous carbon with micro-mesoporous structures is derived from sodium alginate by a carbonization, activation, and hydrothermal doping process, which exhibits large specific surface area (2587 m^(2)·g^(‒1)) and high specific capacitance (190.7 F·g^(‒1)) for adsorption of salt ions and heavy metal ions. Furthermore, the materials provide a desalination capacity of 26.9 mg·g−1 at 1.2 V in 500 mg·L^(‒1) NaCl solution as well as a high removal capacity (239.6 mg·g^(‒1)) and adsorption rate (7.99 mg·g^(‒1)·min^(‒1)) for Pb2+ with an excellent cycle stability. This work can pave the way to design low-cost porous carbon with high-performances for removal of salt ions and heavy metal ions.
基金supported by the National Natural Science Foundation of China(22225503,U21A20285,and 22375153)the Hubei Provincial Natural Science Foundation of China(2023AFA011)the Funda-mental Research Funds for Central Universities(2042023kf0127).
文摘The sp2 carbon-conjugated covalent organic frameworks(COFs)with fully π-conjugated lattice and high chemical stability are promising heterogeneous photocatalysts.Herein,we report the design and synthesis of a novel palladium(Pd)porphyrin-based sp2 carbon-conjugated COF(PdPor-sp2c-COF)with an eclipsed AA stacking 2D structure.Interestingly,PdPor-sp2c-COF showed high crystallinity,good chemical stability,and a broad absorp-tion of visible light.Moreover,compared to our previously reported metal-free Por-sp2c-COF,PdPor-sp2c-COF displays an improved photocatalytic performance in the selective aerobic oxidation of sulfides under green light irradiation.The systematic mechanistic studies testified that the enhanced photocatalytic activity can be ascribed to promoting energy transfer pathway over PdPor-sp2c-COF.Our study clearly demonstrates that it is favorable to promote the energy transfer pathway in sp2 carbon-conjugated COFs by using metalloporphyrin-based molecular building blocks.This work will inspire us to design and synthesize novel photocatalysts based on COFs for the selective aerobic oxidation.
