Quantum algorithms have demonstrated provable speedups over classical counterparts,yet establishing a comprehensive theoretical framework to understand the quantum advantage remains a core challenge.In this work,we de...Quantum algorithms have demonstrated provable speedups over classical counterparts,yet establishing a comprehensive theoretical framework to understand the quantum advantage remains a core challenge.In this work,we decode the quantum search advantage by investigating the critical role of quantum state properties in random-walk-based algorithms.We propose three distinct variants of quantum random-walk search algorithms and derive exact analytical expressions for their success probabilities.These probabilities are fundamentally determined by specific initial state properties:the coherence fraction governs the first algorithm’s performance,while entanglement and coherence dominate the outcomes of the second and third algorithms,respectively.We show that increased coherence fraction enhances success probability,but greater entanglement and coherence reduce it in the latter two cases.These findings reveal fundamental insights into harnessing quantum properties for advantage and guide algorithm design.Our searches achieve Grover-like speedups and show significant potential for quantum-enhanced machine learning.展开更多
We present the Seismotectonic Map of Africa based on a geological,geophysical and geodetic database including instrumental seismicity and re-appraisal of large historical events,and harmonization and homogenization of...We present the Seismotectonic Map of Africa based on a geological,geophysical and geodetic database including instrumental seismicity and re-appraisal of large historical events,and harmonization and homogenization of earthquake parameters in the catalogues.Although establishing the seismotectonic framework of the African continent is a difficult task.展开更多
Objective and Impact Statement:This study aims to couple C-reactive protein(CRP)antibodies onto latex spheres of 2 different sizes to enhance the accuracy and sensitivity of CRP detection.Furthermore,it seeks to estab...Objective and Impact Statement:This study aims to couple C-reactive protein(CRP)antibodies onto latex spheres of 2 different sizes to enhance the accuracy and sensitivity of CRP detection.Furthermore,it seeks to establish a robust methodological framework crucial for advancing the development of latex-enhanced immunoturbidimetric detection reagents.Introduction:CRP,an acute-phase protein,rapidly elevates in response to infections or tissue damage.Double-particle latex-enhanced immunoturbidimetry offers important advantages for accurately measuring CRP levels.Methods:CRP antibodies were coupled with 2 sizes of polystyrene latex spheres.Coupling rates were evaluated to determine optimal conditions.Particle sizes suitable for CRP detection,as well as coupling and mixing ratios,were optimized using automated biochemical analysis.Transmission electron microscopy and nanoparticle size analysis were employed to characterize the morphology and size changes of CRP antibodies and coupled latex spheres before and after immune reaction.Results:Optimization identified 168-and 80-nm latex sphere sizes,with CRP antibody coupling rates of 92%and 91%,respectively.The optimal ratios were 10:1.5 for large latex spheres to polyclonal antibodies and 5:1.5 for small latex spheres to monoclonal antibodies.A 1:8 mixing ratio of large to small latex spheres was effective.Transmission electron microscopy confirmed uniform sizes postcoupling,maintaining dispersion with no morphological changes.CRP reacted with the double-particle latex reagent,forming immune complexes that exhibited agglutination.Mixed latex spheres showed varied agglutination states with CRP concentration,altering solution absorbance.Conclusion:This study validates the efficacy of the dual-particle-size CRP antibody latex reagent,highlighting its potential for future immunoturbidimetric analysis applications.展开更多
during the(G20) Hangzhou Summit, the BRICS leaders informal meeting was held. The top leaders of the 5 countries believe that the prospects and momentum for economic growth in the BRICS member countries are still ther...during the(G20) Hangzhou Summit, the BRICS leaders informal meeting was held. The top leaders of the 5 countries believe that the prospects and momentum for economic growth in the BRICS member countries are still there, and will continue to serve as an important engine of global economic growth. BRICS members, under the guiding principle of open, equality, inclusiveness, mutual benefit and win-win cooperation, would further strengthen their strategic partnership, and promote the construction of equal and fair international order on the basis of international law.展开更多
基金supported by the Fundamental Research Funds for the Central Universities,the National Natural Science Foundation of China(Grant Nos.12371132,12075159,12171044,12071179,and 12405006)the specific research fund of the Innovation Platform for Academicians of Hainan Province.
文摘Quantum algorithms have demonstrated provable speedups over classical counterparts,yet establishing a comprehensive theoretical framework to understand the quantum advantage remains a core challenge.In this work,we decode the quantum search advantage by investigating the critical role of quantum state properties in random-walk-based algorithms.We propose three distinct variants of quantum random-walk search algorithms and derive exact analytical expressions for their success probabilities.These probabilities are fundamentally determined by specific initial state properties:the coherence fraction governs the first algorithm’s performance,while entanglement and coherence dominate the outcomes of the second and third algorithms,respectively.We show that increased coherence fraction enhances success probability,but greater entanglement and coherence reduce it in the latter two cases.These findings reveal fundamental insights into harnessing quantum properties for advantage and guide algorithm design.Our searches achieve Grover-like speedups and show significant potential for quantum-enhanced machine learning.
文摘We present the Seismotectonic Map of Africa based on a geological,geophysical and geodetic database including instrumental seismicity and re-appraisal of large historical events,and harmonization and homogenization of earthquake parameters in the catalogues.Although establishing the seismotectonic framework of the African continent is a difficult task.
基金supported in part by the Jilin Science and Technology Development Program(no.20220401085YY to Jiancheng Xu).
文摘Objective and Impact Statement:This study aims to couple C-reactive protein(CRP)antibodies onto latex spheres of 2 different sizes to enhance the accuracy and sensitivity of CRP detection.Furthermore,it seeks to establish a robust methodological framework crucial for advancing the development of latex-enhanced immunoturbidimetric detection reagents.Introduction:CRP,an acute-phase protein,rapidly elevates in response to infections or tissue damage.Double-particle latex-enhanced immunoturbidimetry offers important advantages for accurately measuring CRP levels.Methods:CRP antibodies were coupled with 2 sizes of polystyrene latex spheres.Coupling rates were evaluated to determine optimal conditions.Particle sizes suitable for CRP detection,as well as coupling and mixing ratios,were optimized using automated biochemical analysis.Transmission electron microscopy and nanoparticle size analysis were employed to characterize the morphology and size changes of CRP antibodies and coupled latex spheres before and after immune reaction.Results:Optimization identified 168-and 80-nm latex sphere sizes,with CRP antibody coupling rates of 92%and 91%,respectively.The optimal ratios were 10:1.5 for large latex spheres to polyclonal antibodies and 5:1.5 for small latex spheres to monoclonal antibodies.A 1:8 mixing ratio of large to small latex spheres was effective.Transmission electron microscopy confirmed uniform sizes postcoupling,maintaining dispersion with no morphological changes.CRP reacted with the double-particle latex reagent,forming immune complexes that exhibited agglutination.Mixed latex spheres showed varied agglutination states with CRP concentration,altering solution absorbance.Conclusion:This study validates the efficacy of the dual-particle-size CRP antibody latex reagent,highlighting its potential for future immunoturbidimetric analysis applications.
文摘during the(G20) Hangzhou Summit, the BRICS leaders informal meeting was held. The top leaders of the 5 countries believe that the prospects and momentum for economic growth in the BRICS member countries are still there, and will continue to serve as an important engine of global economic growth. BRICS members, under the guiding principle of open, equality, inclusiveness, mutual benefit and win-win cooperation, would further strengthen their strategic partnership, and promote the construction of equal and fair international order on the basis of international law.
