In this paper, we study the homotopy category of unbounded complexes of strongly copure projective modules with bounded relative homologies K;（SCP）.We show that the existence of a right recollement of K;（SCP） with...In this paper, we study the homotopy category of unbounded complexes of strongly copure projective modules with bounded relative homologies K;（SCP）.We show that the existence of a right recollement of K;（SCP） with respect to K;（SCP）, K;（SCP） and K;（SCP） has the homotopy category of strongly copure projective acyclic complexes as a triangulated subcategory in some case.展开更多
Despite the promising progress in conductive hydrogels made with pure conducting polymer,great challenges remain in the interface adhesion and robustness in longterm monitoring.To address these challenges,Prof.Seung H...Despite the promising progress in conductive hydrogels made with pure conducting polymer,great challenges remain in the interface adhesion and robustness in longterm monitoring.To address these challenges,Prof.Seung Hwan Ko and Taek-Soo Kim’s team introduced a laserinduced phase separation and adhesion method for fabricating conductive hydrogels consisting of pure poly(3,4-ethylenedioxythiophene):polystyrene sulfonate on polymer substrates.The laser-induced phase separation and adhesion treated conducting polymers can be selectively transformed into conductive hydrogels that exhibit wet conductivities of 101.4 S cm^(−1) with a spatial resolution down to 5μm.Moreover,they maintain impedance and charge-storage capacity even after 1 h of sonication.The micropatterned electrode arrays demonstrate their potential in long-term in vivo signal recordings,highlighting their promising role in the field of bioelectronics.展开更多
Biomarker and stable carbon isotope analyses are presented for the Garau Formation of the Cretaceous Age,an important source rock in western Iran,to reveal its potential as an oilprone source rock.The C_(28)/C_(29)ste...Biomarker and stable carbon isotope analyses are presented for the Garau Formation of the Cretaceous Age,an important source rock in western Iran,to reveal its potential as an oilprone source rock.The C_(28)/C_(29)sterane ratio value range(0.72 to 0.83)of bitumen samples from the formation suggests that they were likely formed during phytoplankton blooms.Sterane,hopane,and isoprenoid/n-alkane ratios indicate that the formation's organic matter predominantly consists of algae,and bacteria,accompanied by some reworked material derived from higher plants.Due to the predominance of anoxic conditions and the actions of sulfate-reducing bacteria,the bitumen present is enriched with sulfur compounds.The percentages of saturates,aromatics,and nitrogen-sulfuroxygen(NSO)fractions in the bitumen samples classify them as naphthenic oils.Isotope analysis reveals that biodegradation and water-washing have reduced the concentrations of some volatile saturates and low molecular weight aromatics in the bitumen samples.These actions have resulted in distinctiveδ^(13)C values for the formation's kerogen and bitumen fractions.The formation's organic matter has been subjected to high-temperature thermal regimes and has entered the oil-generation window at the sampled localities,with vitrinite reflectance(%R_(C))varying between 0.7%and 0.75%.展开更多
In this paper,we study the Bowen entropy of stable sets in positive entropy G-system of amenable group actions.The lower bound of the Bowen entropy of these sets are estimated.
针对现有无数据模型窃取攻击技术在有限的查询预算下难以拟合原始训练集分布,进而影响对目标模型决策边界拟合效果问题,提出了一种基于Stable Diffusion的模型窃取攻击方法(Model Extraction Attack Based on Stable Diffusion,MEASD)....针对现有无数据模型窃取攻击技术在有限的查询预算下难以拟合原始训练集分布,进而影响对目标模型决策边界拟合效果问题,提出了一种基于Stable Diffusion的模型窃取攻击方法(Model Extraction Attack Based on Stable Diffusion,MEASD).利用预训练的Stable Diffusion生成训练数据可能涵盖多个域,并包含大量非判别性样本,设计了ILAF方法以优化Stable Diffusion生成的数据品质.将高质量合成数据的原始样本与由对抗样本生成器生成的对抗样本组成替代训练集.由DPA模块组合的替代模型基于替代训练集拟合目标模型的决策边界.实验结果表明,在四个主流的基准数据集上与EBFA和DMEAE方法相比,所提的MEASD方法能够将目标模型决策边界的拟合程度提高至84%,对目标模型的黑盒对抗攻击成功率超过68%,并且查询预算较低.MEASD方法能够有效地提升目标模型决策边界拟合效果及攻击成功率.展开更多
University courses should have both breadth and depth.However,most courses in universities only focus on the breadth construction,while neglecting the depth construction,resulting in students being unable to apply the...University courses should have both breadth and depth.However,most courses in universities only focus on the breadth construction,while neglecting the depth construction,resulting in students being unable to apply the knowledge they have learned to conduct research or solve real-world application problems.The students’high-level abilities are insufficient and not well-trained.Therefore,in this paper,we propose a T-structured course design method to ensure both breadth and depth of a course.The proposed T-structured course design method includes four aspects:T-structured course contents,T-structured teaching activities,T-structured examination formats,and T-structured homework difficulty.By applying our proposed T-structured course design strategy to the course Optimization Algorithms and Intelligent Computing,good results are achieved,demonstrating the applicability of our proposed strategy.展开更多
The Metal Stable Isotope Geochemistry Laboratory(MSIGL)at the University of Science and Technology of China has developed state-of-the-art analytical methods for twelve stable isotope systems,including Mg,Si,V,Fe,Cu,Z...The Metal Stable Isotope Geochemistry Laboratory(MSIGL)at the University of Science and Technology of China has developed state-of-the-art analytical methods for twelve stable isotope systems,including Mg,Si,V,Fe,Cu,Zn,Rb,Sr,Ag,Cd,Ba,and U.Geological and biological samples were first digested by acid dissolution or alkali dissolution.The target element was subsequently purified by the column chromatography method.A Neptune Plus MC-ICP-MS was used to measure isotope compositions and the isotope bias caused during measurements was calibrated by standard bracketing and/or the double spike method.The analytical procedure was carefully checked to ensure the high precision and accuracy of the data.Here,we summarized the protocol of these established methods and compiled the standard data measured at our lab as well as those reported in literature.This comprehensive dataset can serve as a reliable benchmark for calibration,method validation,and quality assurance in metal stable isotope analyses.展开更多
Semiconductor quantum dots(QDs),as high-performance materials,play an essential role in contemporary industry,mainly due to their high photoluminescent quantum yield,wide absorption characteristics,and size-dependent ...Semiconductor quantum dots(QDs),as high-performance materials,play an essential role in contemporary industry,mainly due to their high photoluminescent quantum yield,wide absorption characteristics,and size-dependent light emission.It is essential to construct well-defined micro-/nano-structures using QDs as building blocks for micro-optic applications.However,the fabrication of stable QDs with designed functional structures has long been challenging.Here,we propose a strategy for three-dimensional direct lithography of desired QDs within a hybrid medium with specific protection properties.The acrylate-functionalized hybrid precursors enable local crosslinking through ultrafast laser-induced multiphoton absorption,achieving sub-100 nm resolution surpassing the diffraction limit.The printed micro-/nano-structures possess thermal stability up to 600℃,which can be transformed to inorganic architectures with a volume shrinkage.Due to the encapsulated QDs within the densely silicon-oxygen molecular networks,the functional structures demonstrate good stability against ultraviolet irradiation,corrosive solutions,and elevated temperatures.Based on hybrid3D nanolithography,bicolor multilayer micro-/nano-structures are manufactured for applications in 3D data storage and optical information encryption.This research presents an effective strategy for the fabrication of desired QD micro-/nano-structures,supporting the development of stable functional device applications.展开更多
Stable isotope technology,as an important analytical tool,has been widely applied in the field of fisheries in China in recent years.This article summarizes the basic principles and research status of stable isotope t...Stable isotope technology,as an important analytical tool,has been widely applied in the field of fisheries in China in recent years.This article summarizes the basic principles and research status of stable isotope technology,with a focus on its application in China's fisheries research and field,including fisheries resource assessment,aquatic product traceability,and aquaculture ecosystem research.At the same time,the problems existing in the application process of this technology were analyzed,and the future development direction was discussed.By comprehensively elaborating on the application of stable isotope technology in the field of fisheries,the aim is to provide reference for relevant researchers and practitioners,and promote the further development and application of this technology in the field of fisheries.展开更多
文摘In this paper, we study the homotopy category of unbounded complexes of strongly copure projective modules with bounded relative homologies K;（SCP）.We show that the existence of a right recollement of K;（SCP） with respect to K;（SCP）, K;（SCP） and K;（SCP） has the homotopy category of strongly copure projective acyclic complexes as a triangulated subcategory in some case.
基金supported by the National Natural Science Foundation of China(52475610)Zhejiang Provincial Natural Science Foundation of China(LDQ24E050001).
文摘Despite the promising progress in conductive hydrogels made with pure conducting polymer,great challenges remain in the interface adhesion and robustness in longterm monitoring.To address these challenges,Prof.Seung Hwan Ko and Taek-Soo Kim’s team introduced a laserinduced phase separation and adhesion method for fabricating conductive hydrogels consisting of pure poly(3,4-ethylenedioxythiophene):polystyrene sulfonate on polymer substrates.The laser-induced phase separation and adhesion treated conducting polymers can be selectively transformed into conductive hydrogels that exhibit wet conductivities of 101.4 S cm^(−1) with a spatial resolution down to 5μm.Moreover,they maintain impedance and charge-storage capacity even after 1 h of sonication.The micropatterned electrode arrays demonstrate their potential in long-term in vivo signal recordings,highlighting their promising role in the field of bioelectronics.
文摘Biomarker and stable carbon isotope analyses are presented for the Garau Formation of the Cretaceous Age,an important source rock in western Iran,to reveal its potential as an oilprone source rock.The C_(28)/C_(29)sterane ratio value range(0.72 to 0.83)of bitumen samples from the formation suggests that they were likely formed during phytoplankton blooms.Sterane,hopane,and isoprenoid/n-alkane ratios indicate that the formation's organic matter predominantly consists of algae,and bacteria,accompanied by some reworked material derived from higher plants.Due to the predominance of anoxic conditions and the actions of sulfate-reducing bacteria,the bitumen present is enriched with sulfur compounds.The percentages of saturates,aromatics,and nitrogen-sulfuroxygen(NSO)fractions in the bitumen samples classify them as naphthenic oils.Isotope analysis reveals that biodegradation and water-washing have reduced the concentrations of some volatile saturates and low molecular weight aromatics in the bitumen samples.These actions have resulted in distinctiveδ^(13)C values for the formation's kerogen and bitumen fractions.The formation's organic matter has been subjected to high-temperature thermal regimes and has entered the oil-generation window at the sampled localities,with vitrinite reflectance(%R_(C))varying between 0.7%and 0.75%.
基金Supported by NSFC(No.11861010),also supported by NSFC(No.12171175),also supported by NSFC(No.12261006)NSF of Guangxi Province(No.2018GXNSFFA281008)Project of Guangxi First Class Disciplines of Statistics(No.GJKY-2022-01)。
文摘In this paper,we study the Bowen entropy of stable sets in positive entropy G-system of amenable group actions.The lower bound of the Bowen entropy of these sets are estimated.
文摘针对现有无数据模型窃取攻击技术在有限的查询预算下难以拟合原始训练集分布,进而影响对目标模型决策边界拟合效果问题,提出了一种基于Stable Diffusion的模型窃取攻击方法(Model Extraction Attack Based on Stable Diffusion,MEASD).利用预训练的Stable Diffusion生成训练数据可能涵盖多个域,并包含大量非判别性样本,设计了ILAF方法以优化Stable Diffusion生成的数据品质.将高质量合成数据的原始样本与由对抗样本生成器生成的对抗样本组成替代训练集.由DPA模块组合的替代模型基于替代训练集拟合目标模型的决策边界.实验结果表明,在四个主流的基准数据集上与EBFA和DMEAE方法相比,所提的MEASD方法能够将目标模型决策边界的拟合程度提高至84%,对目标模型的黑盒对抗攻击成功率超过68%,并且查询预算较低.MEASD方法能够有效地提升目标模型决策边界拟合效果及攻击成功率.
基金supported in part by the fund of 2023 Guangdong Province Science and Technology Innovation Strategy Special Project“Construction of Industrial Data and Intelligent Application Innovation Platform”(2023A011),2024 Shanwei New Generation Electronic Information Industry Talent Revitalization Plan,and the project“Research on the Impact and Countermeasures of Large Scale Charging Facility Access on Guangdong Power Grid Planning and Construction.”。
文摘University courses should have both breadth and depth.However,most courses in universities only focus on the breadth construction,while neglecting the depth construction,resulting in students being unable to apply the knowledge they have learned to conduct research or solve real-world application problems.The students’high-level abilities are insufficient and not well-trained.Therefore,in this paper,we propose a T-structured course design method to ensure both breadth and depth of a course.The proposed T-structured course design method includes four aspects:T-structured course contents,T-structured teaching activities,T-structured examination formats,and T-structured homework difficulty.By applying our proposed T-structured course design strategy to the course Optimization Algorithms and Intelligent Computing,good results are achieved,demonstrating the applicability of our proposed strategy.
基金the National Science Foundation of China(Nos.42273007 and 42473008)the Distinguished Young Scholars of Anhui,China(No.2408085J021)。
文摘The Metal Stable Isotope Geochemistry Laboratory(MSIGL)at the University of Science and Technology of China has developed state-of-the-art analytical methods for twelve stable isotope systems,including Mg,Si,V,Fe,Cu,Zn,Rb,Sr,Ag,Cd,Ba,and U.Geological and biological samples were first digested by acid dissolution or alkali dissolution.The target element was subsequently purified by the column chromatography method.A Neptune Plus MC-ICP-MS was used to measure isotope compositions and the isotope bias caused during measurements was calibrated by standard bracketing and/or the double spike method.The analytical procedure was carefully checked to ensure the high precision and accuracy of the data.Here,we summarized the protocol of these established methods and compiled the standard data measured at our lab as well as those reported in literature.This comprehensive dataset can serve as a reliable benchmark for calibration,method validation,and quality assurance in metal stable isotope analyses.
基金supported by the National Key Research and Development Program of China(2024YFB3213700)Shenzhen Science and Technology Program(Shenzhen Key Laboratory of Ultrafast Laser Micro/Nano Manufacturing ZDSYS20220606100405013)+3 种基金Natural Science Foundation of Guangdong Province(2022B1515120061)National Natural Science Foundation of China(T2421003)Postdoctoral Fellowship Program of China Postdoctoral Science Foundation(GZC20231722)Research Team Cultivation Program of Shenzhen University(2023QNT009)。
文摘Semiconductor quantum dots(QDs),as high-performance materials,play an essential role in contemporary industry,mainly due to their high photoluminescent quantum yield,wide absorption characteristics,and size-dependent light emission.It is essential to construct well-defined micro-/nano-structures using QDs as building blocks for micro-optic applications.However,the fabrication of stable QDs with designed functional structures has long been challenging.Here,we propose a strategy for three-dimensional direct lithography of desired QDs within a hybrid medium with specific protection properties.The acrylate-functionalized hybrid precursors enable local crosslinking through ultrafast laser-induced multiphoton absorption,achieving sub-100 nm resolution surpassing the diffraction limit.The printed micro-/nano-structures possess thermal stability up to 600℃,which can be transformed to inorganic architectures with a volume shrinkage.Due to the encapsulated QDs within the densely silicon-oxygen molecular networks,the functional structures demonstrate good stability against ultraviolet irradiation,corrosive solutions,and elevated temperatures.Based on hybrid3D nanolithography,bicolor multilayer micro-/nano-structures are manufactured for applications in 3D data storage and optical information encryption.This research presents an effective strategy for the fabrication of desired QD micro-/nano-structures,supporting the development of stable functional device applications.
基金supported by the National Modern Agricultural Industry Technology System(CARS-45-33)Innovation Team of Tianjin Freshwater Aquaculture Industry Technology System(ITTFRS2021000-002 and ITTFRS2021000-001)+1 种基金Tianjin Science and Technology Plan Project(24KPHDRC00280,24ZYCGSN00250 and 23YDTPJC00420)the Open Fund Project of Key Laboratory of Ocean Observation Technology,MNR(2023klootA03).
文摘Stable isotope technology,as an important analytical tool,has been widely applied in the field of fisheries in China in recent years.This article summarizes the basic principles and research status of stable isotope technology,with a focus on its application in China's fisheries research and field,including fisheries resource assessment,aquatic product traceability,and aquaculture ecosystem research.At the same time,the problems existing in the application process of this technology were analyzed,and the future development direction was discussed.By comprehensively elaborating on the application of stable isotope technology in the field of fisheries,the aim is to provide reference for relevant researchers and practitioners,and promote the further development and application of this technology in the field of fisheries.
