The incorporation of the quasicrystalline phase into the metal matrix offers a wide range of potential applications in particle-reinforced metal-matrix composites.The analytic solution of the piezoelectric quasicrysta...The incorporation of the quasicrystalline phase into the metal matrix offers a wide range of potential applications in particle-reinforced metal-matrix composites.The analytic solution of the piezoelectric quasicrystal(QC)microsphere considering the thermoelectric effect and surface effect contained in the elastic matrix is presented in this study.The governing equations for the QC microsphere in the matrix subject to the external electric loading are derived based on the nonlocal elastic theory,electro-elastic interface theory,and eigenvalue method.A comparison between the existing results and the finite-element simulation validates the present approach.Numerical examples reveal the effects of temperature variation,nonlocal parameters,surface properties,elastic coefficients,and phason coefficients on the phonon,phason,and electric fields.The results indicate that the QC microsphere enhances the mechanical properties of the matrix.The results are useful for the design and understanding of the characterization of QCs in micro-structures.展开更多
Protein A modified magnetic spheres(Fe_(3)O_(4)@SiO_(2)-Protein A)with 22.7 emu/g saturation magnetization were prepared and characterized.These spheres had a diameter of 10 nm and was stable up to 229.2℃,and can bon...Protein A modified magnetic spheres(Fe_(3)O_(4)@SiO_(2)-Protein A)with 22.7 emu/g saturation magnetization were prepared and characterized.These spheres had a diameter of 10 nm and was stable up to 229.2℃,and can bond 19.694 mg/g of Protein A.The Fe_(3)O_(4)@SiO_(2)-Protein A was firstly combined with oHSV-BJ-2-A antibody to capture oHSV from disease venom,and the amount of binding virus was 1.92×10^(7)to 3.44×10^(7)PFU/g.Fe_(3)O_(4)@SiO_(2)-Protein A was modified with CD63 antibody,which was further fixed using dissuccinimide octylate(DSS)as a crosslinking agent.The prepared Fe_(3)O_(4)@SiO_(2)-Protein A-CD63 Ab was useful in isolating and enriching exosomes from cell supernatant.Compared with commercial kits,Fe_(3)O_(4)@SiO_(2)-Protein A-CD63 Ab demonstrated a better purification effect,which was successfully monitored using capillary electrophoresis.The total content of exosomes protein extracted using Fe_(3)O_(4)@SiO_(2)-Protein A-CD63 was 3.4 mg/g,which was obviously higher than that reported in some studies.In addition,Fe_(3)O_(4)@SiO_(2)-Protein A-CD63 Ab also showed its repeatability through bonding and elution of 5 cycles,which was effective in cost saving.These indicated Fe_(3)O_(4)@SiO_(2)-Protein A-CD63 Ab had the potential for large-scale purification of exosomes in practical applications.展开更多
Human pose estimation has received significant attention recently due to its various applications in the real world. As the performance of the state-of-the-art human pose estimation methods can be improved by deep lea...Human pose estimation has received significant attention recently due to its various applications in the real world. As the performance of the state-of-the-art human pose estimation methods can be improved by deep learning, this paper presents a comprehensive survey of deep learning based human pose estimation methods and analyzes the methodologies employed. We summarize and discuss recent works with a methodologybased taxonomy. Single-person and multi-person pipelines are first reviewed separately. Then, the deep learning techniques applied in these pipelines are compared and analyzed. The datasets and metrics used in this task are also discussed and compared. The aim of this survey is to make every step in the estimation pipelines interpretable and to provide readers a readily comprehensible explanation. Moreover, the unsolved problems and challenges for future research are discussed.展开更多
We prepared porous Fe-doped nickel cobaltate(Fe-NiCo_(2)O_(4))hollow hierarchical nanospheres through a facile self-templated synthetic strategy.Due to the porous hollow structure and composition,the Fe-NiCo_(2)O_(4)p...We prepared porous Fe-doped nickel cobaltate(Fe-NiCo_(2)O_(4))hollow hierarchical nanospheres through a facile self-templated synthetic strategy.Due to the porous hollow structure and composition,the Fe-NiCo_(2)O_(4)presented vastly superior electrocatalytic activity for the oxygen evolution reaction(OER),compared with NiCo_(2)O_(4)and the majority of other OER catalysts.With an aim of stimulating a current density of 10 mA$cm-2,the Fe-NiCo_(2)O_(4)catalyst needs an overpotential of 210 mV,which is on a par with the general properties of commercial IrO2.In addition,the Fe-NiCo_(2)O_(4)catalyst performed stably in long-term testing.The excellent activity and long-term stability showed that such catalysts have great promise for widespread application in the field of water splitting.展开更多
基金supported by the National Natural Science Foundation of China(Nos.U2067220 and 82000980)。
文摘The incorporation of the quasicrystalline phase into the metal matrix offers a wide range of potential applications in particle-reinforced metal-matrix composites.The analytic solution of the piezoelectric quasicrystal(QC)microsphere considering the thermoelectric effect and surface effect contained in the elastic matrix is presented in this study.The governing equations for the QC microsphere in the matrix subject to the external electric loading are derived based on the nonlocal elastic theory,electro-elastic interface theory,and eigenvalue method.A comparison between the existing results and the finite-element simulation validates the present approach.Numerical examples reveal the effects of temperature variation,nonlocal parameters,surface properties,elastic coefficients,and phason coefficients on the phonon,phason,and electric fields.The results indicate that the QC microsphere enhances the mechanical properties of the matrix.The results are useful for the design and understanding of the characterization of QCs in micro-structures.
基金the funding supports from National Natural Science Foundation of China(21605112).
文摘Protein A modified magnetic spheres(Fe_(3)O_(4)@SiO_(2)-Protein A)with 22.7 emu/g saturation magnetization were prepared and characterized.These spheres had a diameter of 10 nm and was stable up to 229.2℃,and can bond 19.694 mg/g of Protein A.The Fe_(3)O_(4)@SiO_(2)-Protein A was firstly combined with oHSV-BJ-2-A antibody to capture oHSV from disease venom,and the amount of binding virus was 1.92×10^(7)to 3.44×10^(7)PFU/g.Fe_(3)O_(4)@SiO_(2)-Protein A was modified with CD63 antibody,which was further fixed using dissuccinimide octylate(DSS)as a crosslinking agent.The prepared Fe_(3)O_(4)@SiO_(2)-Protein A-CD63 Ab was useful in isolating and enriching exosomes from cell supernatant.Compared with commercial kits,Fe_(3)O_(4)@SiO_(2)-Protein A-CD63 Ab demonstrated a better purification effect,which was successfully monitored using capillary electrophoresis.The total content of exosomes protein extracted using Fe_(3)O_(4)@SiO_(2)-Protein A-CD63 was 3.4 mg/g,which was obviously higher than that reported in some studies.In addition,Fe_(3)O_(4)@SiO_(2)-Protein A-CD63 Ab also showed its repeatability through bonding and elution of 5 cycles,which was effective in cost saving.These indicated Fe_(3)O_(4)@SiO_(2)-Protein A-CD63 Ab had the potential for large-scale purification of exosomes in practical applications.
基金supported by the National Natural Science Foundation of China (Nos. 61673192, 61573219, and 61472163)the Fund for Outstanding Youth of Shandong Provincial High School (No. ZR2016JL023)+1 种基金the National High-Tech Research and Development Plan (No. 2015AA042306)the National Social Science Fund Project (No. 13CTQ010)
文摘Human pose estimation has received significant attention recently due to its various applications in the real world. As the performance of the state-of-the-art human pose estimation methods can be improved by deep learning, this paper presents a comprehensive survey of deep learning based human pose estimation methods and analyzes the methodologies employed. We summarize and discuss recent works with a methodologybased taxonomy. Single-person and multi-person pipelines are first reviewed separately. Then, the deep learning techniques applied in these pipelines are compared and analyzed. The datasets and metrics used in this task are also discussed and compared. The aim of this survey is to make every step in the estimation pipelines interpretable and to provide readers a readily comprehensible explanation. Moreover, the unsolved problems and challenges for future research are discussed.
基金the Department of Education Basic Research Operating Costs of Heilongjiang Province,China(Grant No.135309353)。
文摘We prepared porous Fe-doped nickel cobaltate(Fe-NiCo_(2)O_(4))hollow hierarchical nanospheres through a facile self-templated synthetic strategy.Due to the porous hollow structure and composition,the Fe-NiCo_(2)O_(4)presented vastly superior electrocatalytic activity for the oxygen evolution reaction(OER),compared with NiCo_(2)O_(4)and the majority of other OER catalysts.With an aim of stimulating a current density of 10 mA$cm-2,the Fe-NiCo_(2)O_(4)catalyst needs an overpotential of 210 mV,which is on a par with the general properties of commercial IrO2.In addition,the Fe-NiCo_(2)O_(4)catalyst performed stably in long-term testing.The excellent activity and long-term stability showed that such catalysts have great promise for widespread application in the field of water splitting.
