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S空位及非金属掺杂单层Bi_(2)S_(2)Se的第一性原理研究

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原子与分子物理学报 2025年第1期42卷 127-134页

作者：张建华王敏陈畅曹倩徐银湖北大学资源环境学院武汉430062

Bi_(2)S_(2)Se是一种新兴的具有优异光电性能的材料,因此受到了广泛的关注.本研究采用第一性原理方法和开源程序,研究了本征单层Bi_(2)S_(2)Se以及掺杂非金属元素X(X=P,Cl,Br和I)和S空位的体系的电子结构和光学特性.计算结果表明,改性... 详细信息

Bi_(2)S_(2)Se是一种新兴的具有优异光电性能的材料,因此受到了广泛的关注.本研究采用第一性原理方法和开源程序,研究了本征单层Bi_(2)S_(2)Se以及掺杂非金属元素X(X=P,Cl,Br和I)和S空位的体系的电子结构和光学特性.计算结果表明,改性后出现了晶格缺陷.含S空位和P、Cl、Br掺杂体系的带隙减少,而I掺杂体系的带隙增加.同时,含S空位和Cl、Br、I掺杂体系的费米能级穿过导带底,而P掺杂体系的费米能级穿过价带顶.所有改性体系在费米能级附近都出现了缺陷能级或杂质能级,表现出较高的可见光吸收能力和散射能力,改性体系的对可见光的吸收能力和散射能力有所增加.

关键词： Bi_(2)S_(2)Se 掺杂电子结构光学性质第一性原理

Enhancement of photocatalytic efficiency by in situ fabrication of BiOBr/BiVO_4 surface junctions

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Journal of Environmental Sciences 2017年第10期29卷 78-83页

作者： Wenzong yin xiang Sun Wenzhong Wang State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences

Surface junctions between Bi OBr and BiVO4 were synthesized. The BiOBr/BiVO4 with 1 wt.%of Bi OBr exhibited the highest photocatalytic activity in the degradation of Rh B under visible-light irradiation. It was found that the highly efficient adsorption of Rh B molecules via the electrostatic attraction between Br-and cationic ／N（Et）2 group played a key role for the high photocatalytic activities of BiOBr/BiVO4. This efficient adsorption promoted the N-deethylation of Rh B and thus accelerated the photocatalytic degradation of Rh ***, the metal-to-metal charge transfer（MMCT） mechanism was proposed, which revealed the concrete path paved with Bi–O–Bi chains for the carrier migration in BiOBr/BiVO4. The interaction between photoexcited Rh B＊ and the Bi^（3＋） in BiVO4 provided the driving force for the migration of photo-generated carriers along the Bi–O–Bi chains. This work has not only demonstrated the important role of efficient adsorption in the photocatalytic degradation of organic contaminants, but also developed a facile strategy to improve the efficiency of photocatalysts.

关键词： Surface junction Photocatalysis N-deethylation Adsorption efficiency Redox potential

Design and analysis of firewall-penetrated scheme based on trusted host

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The Journal of China Universities of Posts and Telecommunications 2007年第1期14卷 39-44页

作者： ZHANG Deng-yin WANG qian-qian XU Jian Computer Institute Nanjing University of Posts and Telecommunications Nanjing 210003 China

On the basis of various firewall-penetrated technologies, a novel firewall-penetrated technology based on trusted host, which can realize the communication between penetrating host and protected host, is proposed in this paper. Meanwhile, the firewall-penetrated evaluating model and its formalized statement is also proposed by quantizing penetrated level, penetrated quality, and penetrated hiding. Finally, the fuewall-penetrated technology based on trusted host is analyzed under the fuewall-penetrated evaluating model, and the experimental results show that this technology has obvious penetrating effect and high penetrating quality.

关键词： firewall-penetrated trusted host (TH) penetrated host penetrated evaluating model

Impacts of the SSTs over Equatorial Central–Eastern Pacific and Southeastern Indian Ocean on the Cold and Rainy/Snowy/Icy Weather in Southern China

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Journal of Meteorological Research 2023年第2期37卷 248-261页

作者： Zhuolei qian Jiehua MA Zhicong yin Shaoxing Meteorological Office Shaoxing312000 Key Laboratory of Meteorological Disaster(KLME) Ministry of Education&Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)Nanjing University of Information Science&TechnologyNanjing210044 Climate Change Research Center Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing100029 Nansen–Zhu International Research Centre Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing100029 Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai519000

Low temperature together with snow/freezing rain is disastrous in winter over southern *** studies suggest that this is related to the sea surface temperature(SST)anomalies,especially La Nina conditions,over the equatorial central–eastern Pacific Ocean(EP).In reality,however,La Nina episodes are not always accompanied by rainy/snowy/icy(CRSI)days in southern China,such as the case in winter 2020/*** there any other factor that works jointly with the EP SST to affect the winter CRSI weather in southern China?To address this question,CRSI days are defined and calculated based on station observation data,and the related SST anomalies and atmospheric circulations are examined based on the Hadley Centre SST data and the NCEP/NCAR reanalysis data for winters of1978/1979–2017/*** results indicate that the CRSI weather with more CRSI days is featured with both decreased temperature and increased winter precipitation over southern *** SSTs over both the EP and the southeastern Indian Ocean(SIO)are closely related to the CRSI days in southern China with correlation coefficients of-0.29 and 0.39,significant at the 90%and 95%confidence levels,*** SST over EP affects significantly air temperature,as revealed by previous studies,with cooler EP closely related to the deepened East Asian trough,which benefits stronger East Asian winter monsoon(EAWM)and lower air temperature in southern ***,this paper discovers that the SST over SIO affects precipitation of southern China,with a correlation coefficient of 0.42,significant at the 99%confidence level,with warmer SIO correlated with deepened southern branch trough(SBT)and strengthened western North Pacific anomalous anticyclone(WNPAC),favoring more water vapor convergence and enhanced precipitation in southern *** presence of La Ni?a in both winters,compared to the winter of 2020/2021,the winter of 2021/2022 witnessed more CRSI days,perhaps due to the warmer SIO.

关键词： the cold and rainy/snowy/icy(CRSI)days sea surface temperature(SST)anomalies equatorial central–eastern Pacific Ocean(EP) southeastern Indian Ocean(SIO)

Methods for Detection of Subsurface Damage:A Review

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Chinese Journal of Mechanical Engineering 2018年第3期31卷 23-36页

作者： Jing-fei yin qian Bai Bi Zhang Key Laboratory for Precision and Non-traditional Machining of Ministry of Education Dalian University of Technology Department of Mechanical and Energy Engineering South University of Science and Technology

Subsurface damage is easily induced in machining of hard and brittle materials because of their particular mechani?cal and physical properties. It is detrimental to the strength,performance and lifetime of a machined part. To manu?facture a high quality part,it is necessary to detect and remove the machining induced subsurface damage by the subsequent processes. However,subsurface damage is often covered with a smearing layer generated in a machining process,it is rather di cult to directly observe and detect by optical microscopy. An e cient detection of subsur?face damage directly leads to quality improvement and time saving for machining of hard and brittle materials. This paper presents a review of the methods for detection of subsurface damage,both destructive and non?destructive. Although more reliable,destructive methods are typically time?consuming and confined to local damage infor?mation. Non?destructive methods usually su er from uncertainty factors,but may provide global information on subsurface damage distribution. These methods are promising because they can provide a capacity of rapid scan and detection of subsurface damage in spatial distribution.

关键词： Subsurface damage Hard and brittle material Taper polishing Measurement Laser scattering

MICROSTRUCTURE　OF　NiCoCrAlY　COMPONENT　IN　PLASMA　SPRAYED　ZrO_2/NiCoCrAlY　GRADED　COATING

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中国有色金属学会会刊：英文版 1997年第1期7卷 107-111页

作者： xiang, Xinghua Zhu, Jinchuan yin, Zhongda Harbin Inst of Technology Harbin China

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ＭＩＣＲＯＳＴＲＵＣＴＵＲＥＯＦＮｉＣｏＣｒＡｌＹＣＯＭＰＯＮＥＮＴＩＮＰＬＡＳＭＡＳＰＲＡＹＥＤＺｒＯ２／ＮｉＣｏＣｒＡｌＹＧＲＡＤＥＤＣＯＡＴＩＮＧ①ＸｉａｎｇＸｉｎｇｈｕａ，ＺｈｕＪｉｎｇｃｈｕａｎ，ＹｉｎＺｈｏｎｇｄａＳｃｈｏｏｌｏｆＭａｔｅ...

关键词： plasma spraying graded coating NiCoCrAlY microstructure

Jointly optimizing user clustering,power management,and wireless channel allocation for NOMA-based Internet of Things

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Digital Communications and Networks 2021年第1期7卷 29-36页

作者： xiang Sun Liangkun Yu yin Yang Department of Electrical&Computer Engineering University of New MexicoAlbuquerqueNM87131USA School of Computing Clemson UniversityClemsonSC29634USA

In order to accommodate the large number of Internet of Things(IoT)connections in mobile networks,Non-Orthogonal Multiple Access(NOMA)has been applied as the resource sharing mechanism in mobile access networks to improve the spectrum *** NOMA-based resource management for uplink communications comprises two problems,i.e.,user clustering and power&wireless channel *** clustering refers to assigning users in terms of IoT devices to different clusters(where users in the same cluster are sharing the wireless channels to upload their data),and power&wireless channel allocation is to optimize the transmission power of the users and the number of wireless channels allocated to the users in a *** two problems are coupled together,thus making it difficult to solve the NOMA-based resource management *** this paper,we propose a QoS-aWarE resourcE managemenT(SWEET)for NOMA algorithm to jointly optimize the user clustering,power management,and wireless channel allocation such that the number of wireless channels is minimized and the data rate requirements of the users can be *** performance of SWEET is validated via extensive simulations.

关键词： NOMA Internet of Things Resource management

On K_2-group of a Formal Matrix Ring

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Acta Mathematica Sinica,English Series 2012年第9期28卷 1897-1906页

作者： Zi qiang FAN Zhi xiang yin Department of Mathematics Anhui University of Science and Technology

Let S be a formal matrix ring, T the subring consisting of all diagonal elements, I the set consisting of all off-diagonal elements. Then I is a split radical ideal under certain conditions. In this paper, we show tha... 详细信息

关键词： K2 group relative K2 group extension of groups

A Fast Calculation Method for Long-term Security-constrained Unit Commitment of Large-scale Power Systems with Renewable Energy

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Journal of Modern Power Systems and Clean Energy 2022年第5期10卷 1127-1137页

作者： qian Yang Jianxue Wang Hongrui yin Qingtao Li School of Electrical Engineering Xi'an Jiaotong UniversityXi'anChina

With the increase in the penetration rate of renewable energy, the planning and operation of power systems will face huge challenges. To ensure the sufficient utilization of renewable energy, the reasonable arrangement for the long-term power generation plan has become more crucial. Security-constrained unit commitment(SCUC) is a critical technical means to optimize the long-term power generation plan. However, the plentiful power sources and the complex grid structure in largescale power systems will bring great difficulties to long-term SCUC. In this paper, we propose a fast calculation method for long-term SCUC of large-scale power systems with renewable energy. First, a method for unit status reduction based on temporal decomposition is proposed, which will reduce plenty of binary variables and intertemporal constraints in SCUC. Then,an efficient redundant constraint identification(RCI) method is developed to reduce the number of network constraints. Furthermore, a joint accelerated calculation framework for status reduction and RCI is formed, which can reduce the complexity of long-term SCUC while ensuring a high-precision feasible solution. In case studies, numerical results based on two test systems ROTS2017 and NREL-118 are analyzed, which verify the effectiveness and scalability of the proposed calculation method.

关键词： Accelerated calculation framework long-term security-constrained unit commitment(SCUC) redundant constraints identification renewable energy unit status reduction