检索结果-南通市图书馆

Space weathering characteristics of lunar permanently shadowed regions soils:Evidence from experimental simulation

Acta Geochimica 2025年第1期44卷 1-10页

作者： Zixuan Han Yang li Chen li Ronghua Pang Sizhe Zhao Zhuang Guo Kairui Tai Rui li Zhenhao Hu li liu Center for Lunar and Planetary Sciences Institute of GeochemistryChinese Academy of SciencesGuiyangChina University of Chinese Academy of Sciences BeijingChina Center for Excellence in Comparative Planetology Chinese Academy of SciencesHefeiChina State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyMacaoChina NWU-HKU Joint Center of Earth and Planetary Sciences Department of GeologyNorthwest UniversityXi’anChina International Center for Planetary Science Chengdu University of TechnologyChengduChina Deep Space Exploration Lab BeijingChina

Permanently shadowed regions(PSRs)on the Moon are potential reservoirs for water ice,making them hot spots for future lunar *** water ice in PSRs would cause distinctive changes in space weathering there,in particular reduction-oxidation processes that diff er from those in illuminated *** determine the characteristics of products formed during space weathering in PSRs,the lunar meteorite NWA 10203 with artifi cially added water was irradiated with a nanosecond laser to simulate a micro-meteorite bombardment of lunar soil containing water *** TEM results of the water-incorporated sample showed distinct amorphous rims that exhibited irregular thickness,poor stratifi cation,the appearance of bubbles,and a reduced number of npFe^(0).Additionally,EELS analysis showed the presence of ferric iron at the rim of the nanophase metallic iron particles(npFe^(0))in the amorphous rim with the involvement of *** results suggest that water ice is another possible factor contributing to oxidation during micrometeorite bombardment on the lunar *** addition,it off ers a reference for a new space weathering model that incorporates water in PSRs,which could be widespread on asteroids with volatiles.

关键词： Space weathering Permanently shadowed regions The Moon laser irradiation Water ice

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Sulfur atom occupying surface oxygen vacancy to boost the charge transfer and stability for aqueous Bi2O3 electrode

引用

Journal of Energy Chemistry 2025年第2期101卷 751-759页

作者： Guangmin Yang Jianyan lin Guanwu li Tian li Dong Wang Weitao Zheng College of Physics Changchun Normal University School of Materials Science and Engineering Northwestern Polytechnical University Key Laboratory of Automobile Materials of MOE School of Materials Science and Engineering and Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials Jilin University

Oxygen vacancies（Ov） within metal oxide electrodes can enhance mass/charge transfer dynamics in energy storage ***,construction of surface Ovoften leads to instability in electrode structure and irreversible electrochemical reactions,posing a significant *** overcome these challenges,atomic heterostructures are employed to address the structural instability and enhance the mass/charge transfer dynamics associated with phase conversion mechanism in aqueous electrodes,Herein,we introduce an atomic S-Bi2O3heterostructure(sulfur（S） anchoring on the surface Ovof Bi2O3).The integration of S within Bi2O3lattice matrix triggers a charge imbala nce at the heterointerfaces,ultimately resulting in the creation of a built-in electric field（BEF）.Thus,the BEF attracts OH-ions to be adsorbed onto Bi within the regions of high electron cloud overlap in S-Bi2O3,facilitating highly efficient charge ***,the anchored S plays a pivotal role in preserving structural integrity,thus effectively stabilizing the phase conversion reaction of *** a result,the S-Bi2O3electrode achieves72.3 mA h g-1at 10 A g-1as well as high-capacity retention of 81.9% after 1600 *** innovative SBi2O3design presents a groundbreaking approach for fabricating electrodes that exhibit efficient and stable mass and charge transfer ***,it enhances our understanding of the underlying reaction mechanism within energy storage electrodes.

关键词： Anchoring effect Atomic heterostructure Charge/mass transfer Oxygen vavancy Structural integrity

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

电车难题为何不是一个可解的“题”——“故事—阅读”模式伦理学的阐释

引用

世界哲学 2025年第1期 167-177页

作者：李长松姚城西南大学国家治理学院

电车难题以及类似的伦理学两难问题引起了高度的关注,并有大量学者试图给出相应的解法。但这些解法从根本上误解了伦理问题的本质,普特南和麦金太尔的相关理论表明,伦理问题不应该以自然科学的问题—解决模式进行处理,因而电车难题并不... 详细信息

电车难题以及类似的伦理学两难问题引起了高度的关注,并有大量学者试图给出相应的解法。但这些解法从根本上误解了伦理问题的本质,普特南和麦金太尔的相关理论表明,伦理问题不应该以自然科学的问题—解决模式进行处理,因而电车难题并不是一个可解的“题”,伦理学研究应该以阅读文学和理解故事的方式进行。跟随着这种思路,伦理学的首要任务不是寻求某种确定、抽象的伦理算法,而是理解伦理生活的故事性、连续性和具体性。

关键词：电车难题伦理两难伦理算法故事—阅读模式

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Rationally constructing metallic Sn-ZnO heterostructure via in-situ Mn doping for high-rate Na-ion batteries

引用

Chinese Chemical Letters 2025年第2期36卷 518-525页

作者： Bin Fenga Tao Long Ruotong li Yuan-li Ding College of Materials Science and Engineering Hunan University College of Materials and Chemical Engineering Key laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University

Developing a heterostructure for alloying-based anode for sodium-ion batteries（SIBs） is an efficient solution to accommodate volume change upon sodiation/desodiation and boost sodium storage since it combines the merits of each component. Herein, we report a metallic and microphone-like Sn-Zn0.9Mn0.1O heterostructure via an in-situ Mn doping strategy. Based on theoretical calculations and experimental results, the introduction of Mn into Zn O（a small amount of Mn also diffuses into the Sn lattice） can not only enhance intrinsic electronic conductivity but also reduce the Na+diffusion barrier inside the Sn phase. When evaluated as anode for SIBs, the obtained heterostructures show a high reversible capacity of 395.1 mAh/g at 0.1 A/g, rate capability of 332 mAh/g at 5 A/g, and capacity retention of almost 100%after 850 cycles at 5 A/g, indicating its great potential for high-power application of SIBs.

关键词： Heterostructures Mn-doping Sn anode Sn-Zn0.9Mn0.1O Sodium-ion battery

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

An efficient quantum proactive incremental learning algorithm

引用

Science China(Physics,Mechanics & Astronomy) 2025年第1期68卷 45-53页

作者： lingxiao li Jing li Yanqi Song Sujuan Qin Qiaoyan Wen Fei Gao State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China School of Cyberspace Security Beijing University of Posts and TelecommunicationsBeijing 100876China

In scenarios where a large amount of data needs to be learned,incremental learning can make full use of old knowledge,signif-icantly reduce the computational cost of the overall learning process,and maintain high *** this paper,taking the MaxCut problem as our example,we introduce the idea of incremental learning into quantum computing,and propose a Quantum Proactive Incremental Learning algorithm(QPIL).Instead of a one-off training of quantum circuit,QPIL contains a multi-phase training on gradually-increased subgraphs of all vertices,proactively reducing large-scale problems to smaller ones to solve in steps,providing an efficient solution for ***,some vertices and corresponding edges are randomly selected for training to obtain optimized parameters of the quantum circuit at ***,in each incremental phase,the remaining vertices and corresponding edges are gradually added and the parameters obtained from the previous phase are reused in the parameter initialization of the current *** perform experiments on 120 different small-scale graphs,and it shows that QPIL performs superior to prevalent quantum and classical baselines in terms of approximation ratio(AR),time cost,anti-forgetting,and solv-ing *** particular,QPIL’s AR surpasses 20%of mainstream quantum baselines,and the time cost is less than 1/5 of *** idea of QPIL is expected to inspire efficient and high-quality solutions in large-scale MaxCut and other combinatorial optimization problems.

关键词： variational quantum algorithm incremental learning multi-phase training MaxCut quantum computing

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Research on the hazards of gas leakage and explosion in a full-scale residential building

引用

Defence Technology(防务技术) 2025年第1期43卷 168-181页

作者： chengjun Yue li Chen Zhan li Bin Feng Ruizhi Xu Engineering Research Center of Safety and Protection of Explosion&Impact of Ministry of Education Southeast UniversityNanjing 211189China

The gas explosion in residential building has always been a highly concerned *** in homogeneous mixtures have been extensively ***,mixtures are often inhomogeneous in the practical scenarios due to the differences in the densities of methane and *** order to investigate the effects of gas explosions in inhomogeneous mixtures,experimental studies involving gas leakage and explosion are conducted in a full-scale residential building to reproduce the process of gas *** fitting the dimensionless buoyancy as a function of dimensionless height and dimensionless time,a distribution model of gas in large-scale spaces is established,and the mechanism of inhomogeneous distribution of methane is also be ***,the stratified reconstruction method(SRM)is introduced for efficiently setting up inhomogeneous concentration fields in *** simulation results highlight that for the internal overpressure,the distribution of methane has no effect on the first overpressure peak(ΔP1),while it significantly influences the subsequent overpressure peak(ΔP2),and the maximum difference between the overpressure of homogeneous and inhomogeneous distribution is174.3%.Moreover,the initial concentration distribution also has a certain impact on the external overpressure.

关键词： Methane distribution Inhomogeneous mixture Gradient layer Gas explosion Explosive simulation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Deciphering environmental factors influencing phytoplankton community structure in a polluted urban river

引用

Journal of Environmental Sciences 2025年第2期148卷 375-386页

作者： Xiaxia li Kai Chen Chao Wang Tianyu Zhuo Hongtao li Yong Wu Xiaohui Lei Ming li Bin Chen Beibei Chai School of Water Conservancy and Hydroelectric Power Hebei University of EngineeringHandan 056038China Collaborative Innovation Center for Intelligent Regulation and Comprehensive Management of Water Resources School of Water Conservancy and HydroelectricHebei University of EngineeringHandan 056038China Hebei Key Laboratory of Intelligent Water Conservancy Hebei University of EngineeringHandan 056038China Tianjin Water Group Binhai Water Co. Ltd.Tianjin 300308China State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijing 100038China School of Architecture and Civil Engineering Xi’an University of Science and TechnologyXi’an 710054China chengdu University of Technology Chengdu 610059China College of Natural Resources and Environment Northwest A&F UniversityYangling 712100China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing 100875China

Tuojiang River Basin is a first-class tributary of the upper reaches of the Yangtze River—which is the longest river in *** phytoplankton are sensitive indicators of trophic changes inwater bodies,characterizing phytoplankton communities and their growth influencing factors in polluted urban rivers can provide new ideas for pollution ***,we used direct microscopic count and environmental DNA(eDNA)metabarcoding methods to investigate phytoplankton community structure in Tuojiang River Basin(chengdu,Sichuan Province,China).The association between phytoplankton community structure and water environmental factors was evaluated by Mantel *** environmental monitoring data were used to pinpoint major factors that influenced phytoplankton growth based on structural equation *** the phylum level,the dominant phytoplankton taxa identified by the conventional microscopic method mainly belonged to Bacillariophyta,Chlorophyta,and Cyanophyta,in contrast with Chlorophyta,Dinophyceae,and Bacillariophyta identified by eDNA ***α-diversity analysis,eDNA metabarcoding detected greater species diversity and achieved higher precision than the microscopic *** growth was largely limited by phosphorus based on the nitrogen-to-phosphorus ratios>16:1 in all water *** analysis and structural equation modeling also confirmed that the nitrogen-to-phosphorus ratio was the principal factor influencing phytoplankton *** results could be useful for implementing comprehensive management of the river basin *** is recommended to control the discharge of point-and surface-source pollutants and the concentration of dissolved oxygen in areas with excessive nutrients(e.g.,Jianyang-Ziyang).Algae monitoring techniques and removal strategies should be improved in 201 Hospital,Hongrihe Bridge and Colmar Town areas.

关键词： Environmental DNA Microscopic count Phytoplankton growth Structural equation modeling Tuojiang River Basin

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Macroscopic perspective on phase transition behavior of natural single-crystal graphite under different pressure environments

引用

Matter and Radiation at Extremes 2025年第1期10卷 72-80页

作者： Xiaoshuang Yin Songyang li lijuan Wang Peiyuan liu Zhihai cheng Huiyang Gou liuxiang Yang Center for High Pressure Science and Technology Advanced Research Beijing 100193China Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education) Department of PhysicsRenmin University of ChinaBeijing 100872China

Comprehensive understanding of the direct transformation pathway from graphite to diamond under high temperature and high pressure has long been one of the fundamental goals in materials *** considerable experimental and theoretical progress,current experimental studies have mainly focused on the local microstructural characterizations of recovered samples,which has certain limitations for hightemperature and high-pressure products,which often exhibit ***,we report on the pressure-induced phase transition behavior of natural single-crystal graphite under three distinct pressure-transmitting media from a macroscopic perspective using in situ two-dimensional Raman spectroscopy,scanning electron microscopy,and atomic force *** surface evolution process of graphite before and after the phase transition is captured,revealing that pressure-induced surface textures can impede the continuity of the phase transition process across the entire single *** results provide a fresh perspective for studying the phase transition behavior of graphite and greatly deepen our understanding of this behavior,which will be helpful in guiding further high-temperature and high-pressure syntheses of carbon allotropes.

关键词： behavior transition phase

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Dual-phase enhancement strategy for li_(4)Ti_(5)O_(12)-TiO_(2) and other anodes in li/Mg ion batteries

引用

Nano Research 2025年第2期18卷 298-316页

作者： Meijia Song Lefei li Xiuzhen Wang School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212000China School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212000China

The *** for portable and environmentally sustainableenergyfor use in the electronic/electrical equipment,automobile,and so on has resulted in an ever-increasing development in the rechargeable metal-ion-battery *** anode is a crucial component of the battery system,influencing both the cost and overall performance of the *** optimize the electrochemical properties of anode materials,constructing the dual-phase structure has been identified as an effective *** mutual buffering between phases helps alleviate dramatic volume changes,while the abundant interfaces increase active sites and enhance the ion *** this review,the research and development of main anode materials with dual-phase configurations in li/Mg ion batteries are summarized and *** fabrication methods,regulation strategy,electrochemical performance,as well as enhancement mechanisms of dual-phase li_(4)Ti_(5)O_(12)-TiO_(2) composites,TiO_(2)-based composites,alloy-type materials,and other types of dual-phase anodes are reviewed and compared in ***,some perspectives about the future progress of dual-phase anode materials for metal-ion batteries are proposed.

关键词： anode materials li_(4)Ti_(5)O_(12)-TiO_(2)anodes dual-phase configuration progress and development

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tunable non-Markovian and quantum coherence in the single-qubit dephasing noise channel

引用

Science China(Physics,Mechanics & Astronomy) 2025年第3期Mechanics & Astronomy) .卷 96-105页

作者： Na-Na Zhang Chao-Yi Wu Xu Zhou Qi-Yuan liu cheng-Ge liu Yong-Rui Guo Ren-Pu li School of Optoelectronic Engineering Chongqing University of Posts and Telecommunications Department of Physics Applied Optics Beijing Area Major Laboratory Beijing Normal University

In this paper, we construct a single-qubit dephasing noise channel based on the nuclear magnetic resonance（NMR） system by employing the bath-engineering technology, and achieve the construction of the tunable non-Markovian environment in the dephasing noise channel. Our findings indicate that for the single-qubit system, the transition of system dynamics from Markovian to non-Markovian can be achieved by adjusting the base frequency of the noise power spectrum. However, the base frequency corresponding to this phase transition point is not fixed, and there is a certain relationship between it and the total evolution time of the single-qubit system. Through our research, we discovered a fundamental relationship: if the single-qubit system dynamics undergoe a transition from Markovian to non-Markovian at ω0within 0-2t ms, shortening the evolution time to 0-t ms results in an increase of the phase transition point to 2ω0. This insight offers crucial guidance for artificially crafting non-Markovian environments across arbitrary time scales in single-qubit systems, and it is not limited by the type of noise. Apart from system dynamics, quantum coherence is also a focal point of our research. We find that when the system dynamics exhibit non-Markovian behavior, the quantum coherence of the single-qubit system experiences revivals. Notably, the timing of these coherence revivals aligns with the instants of the non-Markovianity enhancement. Therefore, our research also serves as a pivotal foundation for the artificial manipulation and realization of quantum coherence revivals within diverse single-qubit systems.

关键词： dephasing noise channel non-Markovian quantum coherence

来源：

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：