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Majorana noise model and its influence on the power spectrum

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Chinese Physics B 2024年第1期33卷 637-646页

作者：陈书梦丁思凡张振涛刘东 State Key Laboratory of Low Dimensional Quantum Physics Department of PhysicsTsinghua UniversityBeijing 100084China School of Physics Science and Information Technology Shandong Key Laboratory of Optical Communication Science and TechnologyLiaocheng UniversityLiaocheng 252059China Beijing Academy of Quantum Information Sciences Beijing 100193China Frontier Science Center for Quantum Information Beijing 100084China Hefei National Laboratory Hefei 230088China

Majorana quantum computation offers a potential approach to securely manipulating and storing quantum data in a topological manner that may effectively resist the decoherence induced by local noise. However, actual Majorana qubit setups are susceptible to noise. In this study, from a quantum dynamics perspective, we develop a noise model for Majorana qubits that accounts for quasi-particle poisoning and Majorana overlapping with fluctuation. Furthermore, we focus on Majorana parity readout methodologies, specifically those leveraging an ancillary quantum dot, and carry out an indepth exploration of continuous measurement techniques founded on the quantum jump model of a quantum point *** these methodologies, we proceed to analyze the influence of noise on the afore-mentioned noise model, employing numerical computation to evaluate the power spectrum and frequency curve. In the culmination of our study, we put forward a strategy to benchmark the presence and detailed properties of noise in Majorana qubits.

关键词： Majorana zero mode topological quantum computation topological devices decoherence and noise in qubits

西安市城市区域创新能力评价——兼论关中平原城市群核心城市建设

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中国商论 2022年第10期 143-145页

作者：陈淑萌桂林理工大学广西桂林541004

当前世界正值新一轮科技革命和第四次工业革命的关键期,随着供给侧结构性改革的深化,“互联网+”、云计算、大数据、信息化等新技术及新模式大量涌现,区域创新能力成为区域综合竞争力的重要标志和地区经济获取国际竞争优势的决定性因素... 详细信息

当前世界正值新一轮科技革命和第四次工业革命的关键期,随着供给侧结构性改革的深化,“互联网+”、云计算、大数据、信息化等新技术及新模式大量涌现,区域创新能力成为区域综合竞争力的重要标志和地区经济获取国际竞争优势的决定性因素。基于已有的区域创新理论体系,本文完善并构建了5个维度的城市区域创新能力评价指标体系,采集西安市2016—2020年以来相关的面板数据,综合评价了五年内西安市区域创新能力的相关问题,并对未来一段时期西安市构建创新型城市,同时作为关中平原城市群核心城市的区域创新发展提出了相关建议。

关键词：关中平原城市群西安市区域创新创新能力评价评价指标体系

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工程量清单编制与竣工结算审核工程造价控制

有色金属设计 2016年第1期43卷 65-68页

作者：陈淑梦昆明有色冶金设计研究院股份公司云南昆明650051

针对项目建设投资过程中涉及的造价方面,尤其是在工程招标阶段、施工阶段及竣工结算阶段中出现的投资偏差问题,通过工程量清单控制价计算、建设过程中各项内容的审核等,采取定额结合市场实际、现场查验工程量、建设、施工、设计单位三... 详细信息

针对项目建设投资过程中涉及的造价方面,尤其是在工程招标阶段、施工阶段及竣工结算阶段中出现的投资偏差问题,通过工程量清单控制价计算、建设过程中各项内容的审核等,采取定额结合市场实际、现场查验工程量、建设、施工、设计单位三方加强管理等措施,随时纠正偏差,合理有效地控制投资,促使所有项目参建单位加强管理,保证项目管理目标实现,使人、财、物等资源的利用率最大化,力求获得好地投资效益和社会效益。

关键词：工程造价工程量清单编制竣工结算审核造价控制

应用型本科院校课程群建设实践策略——以商务英语专业文学文化系列课程群建设为例

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吉林农业科技学院学报 2023年第3期32卷 87-90页

作者：陈舒梦大连财经学院商学院大连116200

课程群的构建是提高教学效率、提升人才培养水平的重要举措,是教学改革的发展趋势。文章论证了商务英语专业文学文化系列课程群建设的可行性及意义,提出了课程群建设的基本理念,针对建设商务英语专业文学文化系列课程群提出了具体的方案。

关键词：课程群商务英语文学文化

Research progress on secondary formation,photosensitive reaction mechanism and human health effects of chromophoric brown carbon

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Journal of Environmental Sciences 2025年第5期151卷 310-330页

作者： Baihang chen Jiangyao chen Guiying Li Taicheng An Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and HealthInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Guangdong Technology Research Center for Photocatalytic Technology Integration and Equipment Engineering Guangzhou Key Laboratory of Environmental Catalysis and Pollution ControlSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China

Brown carbon(BrC)has attracted widespread attention because of its strong absorption of solar radiation in the ultraviolet-visible wavelength range,which causes adverse impacts on human ***,BrC was a physically defined class of ***,current research has gradually shifted towards the identification of its chemical groups,because its light-absorbing capability,chemical properties and health effects mainly depend on the chemical composition of its ***,this review mainly focuses on the chemical understanding of BrC based on chromophores,and the secondary formation mechanism of chromophores,photosensitized reactions,and human health effects of BrC were detailly ***,BrC chromophores are divided into five categories:nitrogen-heterocycles,nitrogen-chain,aromatic species,oligomers and sulfur-containing organic *** chromophore precursor species exhibit variations,and their formation mechanisms are also ***,BrC can trigger the production of secondary organic aerosol(SOA)precursors or cause SOA growth because BrC is an important component of light-absorbing particles formed during incomplete combustion of biomass and fossil fuels,potentially exerting adverse effects on human ***,developing sufficiently separated methods for BrC and refining algorithms and machine learning can lead to a more effective understanding of the chemical composition of chromophores,thus enabling better evaluation of the atmospheric effects and health impacts of *** all,this review provides new insights into the categories of BrC chromophores and new advance in secondary formation mechanisms,photosensitized reactions,and human health effects on the basis of chemical structures.

关键词： Brown carbon Constituent characteristics Secondary formation mechanism Photosensitive Human health effects

Halogen composition and heterogeneity in the continental lithospheric mantle

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Science China Earth Sciences 2025年第1期68卷 310-314页

作者： Chunfei chen State Key Laboratory of Geological Processes and Mineral Resources School of Earth SciencesChina University of GeosciencesWuhan430074China

*** Halogens,including fluorine(F),chlorine(Cl),bromine(Br),and iodine(I),are highly mobile and water-soluble elements that can become significantly enriched in melts and *** fluids and melts,halogens react with nearly all metals and readily form complexes with metal cations,significantly influencing the distribution of metal elements between different ***,halogens play a crucial role in the migration,enrichment,and mineralization of key metals in the lithosphere(Weis et al.,2012;Liu et al.,2024).

关键词： metals fluorine elements

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Cyano migration-mediated radical-polar crossover cyclopropanation

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Science China Chemistry 2025年第1期68卷 241-248页

作者： Ziqiang Wang Yasu chen Jie Li chen Zhu Key Laboratory of Organic Synthesis of Jiangsu Province College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Frontiers Science Center for Transformative Molecules Zhangjiang Institute for Advanced Study and Shanghai Key Laboratory for Molecular Engineering of Chiral DrugsShanghai Jiao Tong UniversityShanghai 200240China

We report a novel cyano migration-mediated radical-polar crossover process,whereby both the sulfonylcyanation of aliphatic alkenes and the formation of cyclopropanes are concurrently *** transformation yields a diverse array of multisubstituted cyclopropanes under mild photocatalytic *** studies elucidate that the reaction proceeds via intramolecular nucleophilic substitution,leading to the formation of the cyclopropane derivatives.

关键词： cyclopropanation cyano migration radical-polar crossover radical reactions

Mechanical properties and flow stress constitutive relationship of Ti–6Al–4V alloy with equiaxed microstructure at cryogenic temperatures

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Chinese Journal of Aeronautics 2025年第1期38卷 365-379页

作者： Jingwen HU Xun chen Yashun WANG chen YANG College of Intelligence Science and Technology National University of Defense TechnologyChangsha 410073China Laboratory of Science and Technology on Integrated Logistics Support National University of Defense TechnologyChangsha 410073China

This paper investigates the uniaxial tensile mechanical properties and flow behavior of Ti-6Al-4V alloys with equiaxed microstructure at cryogenic temperatures ranging from 77 K to298 K and strain rates from 10^(-4)/s to 10^(-2)/*** electron microscopy is utilized to analyze the fracture morphology,aiming to reveal the fracture behavior at various *** applicability of the Zener-Hollomon parameter and the Johnson-Cook model in describing the flow stress of Ti-6Al-4V at cryogenic temperatures is ***,a constitutive relationship modeling method based on the variational recurrent networks is *** test results show a significant increase in the strength of equiaxed Ti-6Al-4V alloy under cryogenic conditions while the plastic deformation process is ***,the fracture analysis indicates that even at 77 K,the fracture process is still dominated by ductile fracture,and brittle fracture does not occur within the range of 77 K to 298 *** fitting results validate the performance of the Zener-Hollomon parameter and the Johnson-Cook model in describing the deformation flow stress of Ti-6Al-4V alloy at cryogenic *** results also indicate that the proposed constitutive relationship modeling method based on the variational recurrent network performs better,making it a potential method for widespread applications.

关键词： Titanium alloys Mechanical properties Cryogenics Fracture testing Flow behavior

Activation of peroxymonosulfate by sustainable biomass-based carbon nanotubes for controlling the spread of plant viruses in water environments

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Journal of Environmental Sciences 2025年第3期149卷 99-112页

作者： Jian Tang Yujie Wang JunMa Yujie chen Ming chen College of Resources and Environment Yangtze UniversityWuhan 430100China Key Laboratory of Reservoir Aquatic Environment Chongqing Institute of Green and Intelligent TechnologyChinese Academy of SciencesChongqing 400714China Chongqing School University of Chinese Academy of SciencesChongqing 400714China School of Geography and Tourism Chongqing Normal UniversityChongqing 400714China

With the increasing demand for water in hydroponic systems and agricultural irrigation,viral diseases have seriously affected the yield and quality of *** removing plant viruses in water environments,virus transmission can be prevented and agricultural production and ecosystems can be *** so far,there have been few reports on the removal of plant viruses in water ***,in this study,easily recyclable biomass-based carbon nanotubes catalysts were synthesized with varying metal activities to activate peroxymonosulfate(PMS).Among them,the magnetic 0.125Fe@NCNTs-1/PMS system showed the best overall removal performance against pepper mild mottle virus,with a 5.9 log_(10)removal within 1 ***,the key reactive species in the 0.125Fe@NCNTs-1/PMS system is^(1)O_(2),which can maintain good removal effect in real water matrices(river water and tap water).Through RNA fragment analyses and label free analysis,it was found that this system could effectively cleave virus particles,destroy viral proteins and expose their *** capsid protein of pepper mild mottle virus was effectively decomposed where serine may be the main attacking sites by^(1)O_(2).Long viral RNA fragments(3349 and 1642 nt)were cut into smaller fragments(∼160 nt)and caused their *** summary,this study contributes to controlling the spread of plant viruses in real water environment,which will potentially help protect agricultural production and food safety,and improve the health and sustainability of ecosystems.

关键词： Pepper mild mottle virus Removal Plant virus spread Biomass-based carbon nanotubes Water environments