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A N-CoSe/CoSe_(2.-C@Cu hierarchical architecture as a current collector-integrated anode for potassium-ion batteries

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Rare Metals 2024年第8期43卷 3702-3712页

作者： Zi-Jie Mu Yan-Jun gao Wen-Shuai Dong Zong-You {1. Qing-Yi Song Han-Jiao Huang {1.-Dong Xing jian-Guo Zhang {2. Wang Qi-Yao Yu State Key laboratory of Explosion Science and Technology School of Mechatronical EngineeringBeijing Institute of TechnologyBeijing 100081China School of Metallurgical and Ecological engineering University of Science and Technology BeijingBeijing 100083China

The highly reversible insertion/extraction of large-radius K^+into electrode materials remains a tough goal,especially for con version-type ***,we design a current collector-integrated electrode(N-CoSe/CoSe_(2.-C@Cu) as an advanced anode for potassium-ion battery(PIBs).The conductive CoSe/CoSe_(2. heterojunction with rich Se vacancy defects,conductive sp^2.N-doped carbon layer,and the elastic copper foil matrix can greatly accelerate the electron transfer and enhance the structural ***,the well-designed N-CoSe/CoSe_(2.-C@Cu current collector-integrated electrode displays enhanced potassium storage performance with regard to a high capacity(32..1 mAh·g^(-1) at 0.1 A·g^(-1) after 2.0cycles),an exceptional rate capability(2.3.5 mAh·g^(-1) at2.00 mA·g^(-1)),and an extraordinary long-term cycle stability(a capacity fading of only 0.019% per cycle over12.0 cycles at 2.00 mA·g^(-1)).Impressively,ex situ scanning electron microscopy(SEM) characterizations prove that the elastic structure of copper foil is merged into the cleverly designed N-CoSe/CoSe_(2.-C@Cu heterostructure,which buffers the deformation of structure and volume and greatly promotes the cycle life during the potassium/depotassium process.

关键词： Potassium-ion battery Integrated collector electrode CoSe CoSe_2 Heterojunction Copper foil matrix N-doped carbon

Chiral quantum heating and cooling with an optically controlled ion

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light(Science & Applications) 2024年第7期13卷 1393-1400页

作者： Jin-Tao Bu jian-Qi Zhang {1.-Yi Ding Jia-Chong li Jia-wei Zhang Bin Wang Wen-Qiang Ding Wen-Fei Yuan liang Chen Qi Zhong Ali Keçebaş Şahin KÖzdemir Fei Zhou Hui Jing Mang Feng State Key laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsInnovation Academy of Precision Measurement Science and TechnologyChinese Academy of Sciences430071 WuhanChina. University of the Chinese Academy of Sciences 100049 BeijingChina. Research Center for Quantum Precision Measurement Guangzhou Institute of Industry Technology511458 GuangzhouChina. Department of engineering Science and Mechanics and Materials Research InstitutePennsylvania State UniversityUniversity ParkState CollegePA 16802USA. Key laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics and Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal University410081 ChangshaChina. Department of Physics Zhejiang Normal University321004 JinhuaChina

Quantum heat engines and refrigerators are open quantum systems,whose dynamics can be well understood using a non-Hermitian forma{1.sm.A prominent feature of non-Hermiticity is the existence of exceptional points(EPs),... 详细信息

Quantum heat engines and refrigerators are open quantum systems,whose dynamics can be well understood using a non-Hermitian formalism.A prominent feature of non-Hermiticity is the existence of exceptional points(EPs),which has no counterpart in closed quantum *** has been shown in classical systems that dynamical encirclement in the vicinity of an EP,whether the loop includes the EP or not,could lead to chiral mode ***,we show that this is valid also for quantum systems when dynamical encircling is performed in the vicinity of their liouvillian EPs(LEPs),which include the effects of quantum jumps and associated noise—an important quantum feature not present in previous *** demonstrate,using a Paul-trapped ultracold ion,the first chiral quantum heating and refrigeration by dynamically encircling a closed loop in the vicinity of an *** witness the cycling direction to be associated with the chirality and heat release(absorption)of the quantum heat engine(quantum refrigerator).Our experiments have revealed that not only the adiabaticity breakdown but also the Landau–Zener–Stückelberg process play an essential role during dynamic encircling,resulting in chiral thermodynamic *** observations contribute to further understanding of chiral and topological features in non-Hermitian systems and pave a way to exploring the relation between chirality and quantum thermodynamics.

关键词： quantum chiral dynamical

Key factors in chaperonin-assisted protein folding

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Particuology 2012年第1期10卷 105-116页

作者： Ying Ren jian {1. ji Xu {2. ge jinghai li State Key laboratory of {1. Complex System Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China Graduate University of the Chinese Academy of Sciences Beijing 100039 China

Incorrect folding of proteins in the macromolecular crowding environment in living cells would cause cellular disasters. All cells have developed their structurally and functionally distinct classes of molecular chaperones to help normative proteins fold to their native structures, one of which is the most studied GroEliES complex. In the present article, large-scale all-atom explicit solvent molecular dynamics （MD） simulations have been carried out on rhodanese folding in a series of chaperonin mutants for 2.0ns to understand the mechanism therein. In accordance with experimental results, two factors have been identified to play a significant role, the geometrical confinement effect of the folding cavity and the charge effect of the inner surface of the cavity. Our analysis of the properties during simulation suggests that the GroEL/ES complex directly exerts force on the contacting residues of the substrate, thus assists substrate folding.

关键词： Molecular dynamics simulationExplicit solventChaperoninProtein folding

Explicit solvent molecular dynamics simulations of chaperonin-assisted rhodanese folding

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Particuology 2009年第3期7卷 220-224页

作者： Ying Ren jian {1. Ji XU {2. ge jinghai li State Key laboratory of {1. Complex System Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China Graduate University of the Chinese Academy of Sciences Beijing 100039 China

Chaperonins are known to facilitate the productive folding of numerous misfolded proteins. Despite their established importance, the mechanism of chaperonin-assisted protein folding remains unknown. In the present article, all-atom explicit solvent molecular dynamics （MD） simulations have been performed for the first time on rhodanese folding in a series of cavity-size and cavity-charge chaperonin mutants. A compromise between stability and flexibility of chaperonin structure during the substrate folding has been observed and the key factors affecting this dynamic process are discussed.

关键词： Molecular dynamics simulation Explicit solvent Chaperonin-assisted Protein folding Molecular chaperonin Rhodanese

Contamination assessment,source apportionment and associated health risks of PTEs in agricultural soil under five land-use patterns in Sanya,china

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china {1.ology 2024年第3期7卷 469-479页

作者： jian-zhou Yang Yan-gang Fu Qiu-{1. Gong Sheng-ming Ma Jing-jing Gong jian-weng {2. Zhen-{1.ang Wang Yong-wen Cai Shi-xin Tang institute of {1.ophysical and {1.ochemical Exploration Chinese Academy of Geological SciencesChina Geological SurveyLangfang 065000China Key laboratory of Coup{1.ng process and Effect of Natural Resources Elements Ministry of Natural ResourcesBeijing 100055China

To understand the levels of potentially toxic elements(PTEs)contamination in soils and their effects on human health from different agricultural land use in Sanya,china.1.1. soil samples(64 topsoil samples and corresponding subsoil samples)were collected from the five representative land-use *** coupled plasma mass spectrometry(ICP-MS),Atomic fluorescence spectrometry(AFS),and Inductively coupled plasma optical emission spectrometry(ICP-OES)were used to determine the content of PTEs(As,Cd,Hg,Cu,Cr,Ni,Pb,Zn,Co,Mo,Sb,and V).Correlation analysis and factor analysis were used to determine the source of ***-accumulation index(I_(geo)),hazard quotient(HQ),and total carcinogenic risk index(TR)were used to measure the PTEs contamination and its relative health *** showed that the average values of 1.1.PTEs in topsoil were higher than the Hainan soil geochemical baseline,showing different degrees of PTEs accumulation *** concentration of PTEs in the topsoil was lower than those in the subsoil except for Cd and *** I_(geo)revealed that the major accumulated element in soils was As followed by *** apportionment suggested that parent materials and agricultural practices were the dominant factors for PTEs accumulation in the *** risks of soil samples from five land-use patterns presented a trend of paddy field>dry field>woodland>orchard>garden ***,the HQ values of 1.1.PTEs were less than the recommended limit of HQ=1.representing that there are no non-carcinogenic risks of PTEs for children and adults in the study *** TR values are within 6.95×1.^(-6)-1.38×1.^(-5),which corresponds to the low *** the PTEs in the agricultural soil of the study area show little influence on the health status of the local population.

关键词： Potentially toxic trace elements(PTEs) Soils Land-use geo-accumulation index(Igeo) Hazard quotient(HQ) Total carcinogenic risk index(TR) Source apportionment Health risk Agricutural geological survey {1.

Molecular dynamics simulation of a single polymer in hydrophilic nano-slits

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Chinese Science Bulletin 2008年第17期53卷 2599-2606页

作者： REN Ying gao {1. ge {2. li jinghai HU GuoHua State Key laboratory of {1. Complex System Institute of Process Engineering Chinese Academy of Sciences Beijing 100090 China Graduate University of the Chinese Academy of Sciences Beijing 100039 China laboratory of Chemical {1. Sciences CNRS-ENSIC-INPL 1 rue Grandville BP 20451 Nancy 54001 France

The behavior of a single polyethylene polymer in aqueous solution confined between two hydrophilic walls is studied with molecular dynamics (MD) simulations. The thickness of the nano-slit ranges from 1.2. to 3.1. nm, which is comparative to the polymer dimension. A monotonic transition from 3D- to 2.-like configurations is observed as the distance between the two walls narrows. Monomers are compressed into several layers and the preferred bond orientations alternate between parallel and normal to the walls accordingly. The diffusivity in the direction parallel to the wall is always larger than the one perpendicular to it. Calculation of the entropy and enthalpy changes during the folding of the polymer chain alone cannot explain the spontaneous process. The corresponding increase in water entropy due to volume expansion may be large enough to result in the overall free energy decrease.

关键词：聚乙烯聚合体分子动力学模拟亲水性纳米裂缝

Status of aquatic organisms resources and their environments in Yangtze River system(2.1.-2.2.)⋆

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Aquaculture and Fisheries 2024年第5期9卷 833-850页

作者： Haile Yang li Shen Yongfeng He Huiwu Tian Lei gao Jinming Wu Zhigang Mei Nian wei lin Wang Tingbing Zhu Feifei Hu Jinling Gong Hongchun Du Xinbin Duan Huatang Deng Daoqun Wang Fengyue Zhu Yunfeng li Fan Wu Huijun Ru Yan Zhang Junyi li Junlin Yang Yuntao Zhou Dongdong Fang Yinping Wang Danqing lin Yanping Yang Peijie li Silei liu {2. Yang Ping Zhuang Sikai Wang Tao Zhang Gang Yang Wenbo Yang lilai Yuan Kun Cao Shuo Xu Huiyuan liu Zhiqiang liang Chongrui Wang Hong li Xiping Yuan Xin Yang Yilong Fu Yanping Zhang Haixin Zhang Zhiying Tao Sheng Wang Xiaoping gao Binsong Jin Kemao li Guojie Wang Shenglong {2. Yingqin li Chen{2.g Xue Chunyun Lei Shaowei Xue Yi Sun Bin Zhu Ke Shao Xingkun Hu Meihua Xiong Jun Du Bin He Tao Yan Yingying Huang Yuanchao Zou Biwen Xie Yongming Wang Bin li Fei liu Yaoyao Zhang Fei Fan Zhi{2. Wang Jing Huang Haoran Gu Hailong ge Yan Dan Yan li Shuqiao Wang Chuang Zhang Lu Zhou Xue Wang Sheng Zeng Yan Xiang Xugang He {2.hui Qin Chengxing Xia Jie Hou Yifu Shi lifang gao Zhiqiang Zhu Hongbao Shen Yun Du Xuejun Duan Jiawu Xiong Deguo Yang Shaoping liu Zhaohui Ni Hui Zhang Kai liu Feng Zhao Yingren li {2.wei Wang Qiwei wei Yangtze River Fisheries Research institute Chinese Academy of Fishery SciencesWuhan430223China institute of Hydrobiology Chinese Academy of SciencesWuhan430072China Fishery Resource and Environment Research Center Chinese Academy of Fishery SciencesBeijing100141China Key laboratory of Freshwater Fisheries and {1.rmplasm Resources Utilization Ministry of Agriculture and Rural AffairsFreshwater Fisheries Research CenterChinese Academy of Fishery SciencesWuxi214081China East china Sea Fisheries Research {1. Chinese Academy of Fishery SciencesShanghai200090China institute of Fisheries {1. Chinese Academy of Fishery SciencesBeijing100141China Hunan Fisheries Science institute Changsha410153China jiangxi Fisheries Research {1. Nanchang330039China Jiujiang Academy of Fishery Sciences Jiujiang332000China School of life Sciences Nanchang UniversityNanchang330031China Qinghai Provincial Fishery Technology Extension Center Xining810012China Yunnan Academy of Fishery Sciences Kunming650111China institute of Hydroecology Ministry of Water Resources and Chinese Academy of SciencesWuhan430079China Fisheries institute Sichuan Academy of Agricultural SciencesChengdu611731China School of life Sciences Neijiang Normal UniversityNeijiang641100China School of life Sciences Southwest UniversityChongqing400715China Chongqing Fishery Sciences Research institute Chongqing401120China Guizhou Fisheries Research institute Guiyang550025China College of Fisheries Huazhong Agricultural UniversityWuhan430072China Hubei Fisheries Science Research institute Wuhan430070China Shaanxi Fisheries Research institute Xi’an710086China Innovation Academy for Precision Measurement Science and Technology Chinese Academy of SciencesWuhan430077China Nanjing institute of {1.ography and limnology Chinese Academy of SciencesNanjing210008China Central South Inventory and Planning institute of State Forestry and Grassland Administration Changsha410014China

The Yangtze River is the mother river of *** promote the aquatic ecosystem protection of the great river,the Project of Yangtze Fisheries Resources and Environment Investigation(2.17-2.2.)supported by the Ministry of Agriculture and Rural Affairs,*** carried out by 2. institutes and universities that located in the Yangtze River basin surveys the status of(1)fish species composition and spatial distribution,(2.current fish abundance,(3)endangered fishes,(4)Yangtze finless porpoise,(5)aquatic eco-environments,(6)water-level fluctuation areas,(7)capture fisheries and recreational fisheries of the Yangtze River mainstream and 10 of its main tributaries,including Yalong River,Heng River,Min River(including Dadu River),Chishui River,Tuo River,Jialing River,Wu River,Han River,Dongting Lake and Poyang *** results showed that there were 443 fish species(belonging to 163 genus,37 families,and 18 orders)before 2.17,but only 32. fish species(including 15 new recorded exotic species)were recorded in the project of *** them,Cyprinus carpio,Carassius auratus,Hypophthalmichthys molitrix,Pelteobagrus fulvidraco,Coilia brachygnathus,Silurus asotus,Saurogobio dabryi,Ctenopharyngodon idellus,Pelteobagrus nitidus,Hemiculter leucisculus,Siniperca chuatsi,Coreius heterodon,Culter alburnus,Parabramis pekinensis,and Aristichthys nobilis were the dominant species across the whole Yangtze River *** is estimated that there were 886 million individuals weighing 12..8 million kg,merely equivalent to 2..3%of the resources in 1950s,30.9%of the resources in 1960s,or 58.7%of the resources in *** the new list of protected fishes that recorded in the Yangtze River system,only 15 of 2. were collected in this project of *** gladius has been affirmed to be Extinct by International Union for Conservation of Nature(IUCN).The wild individuals of Tenualosa reevesii and Luciobrama macrocephalus have disappeared for many years and maybe have been extinct

关键词： Fishes Yangtze finless porpoise Resources Aquatic ecosystem Fisheries Background investigation Yangtze river system

铁氧化物“精细还原-非熔态分离”新工艺实验研究

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四川大学学报（工程科学版） 2011年第5期43卷 191-196页

作者：陈培钰高金涛李士琦张颜庭刘润藻张建良北京科技大学冶金与生态工程学院北京100083 天津钢管集团股份有限公司天津300201

基于对现行高炉炼铁-氧气转炉炼钢生产工艺的讨论,提出了"铁氧化物精细还原-非熔态分离"的新工艺。研究中设计、改进了精细还原实验装置,分别设计L1.(2.5)和L4(2.)正交表进行了喀左磁铁矿和某厂炼钢粉尘的精细还原实验以研究微米级铁氧... 详细信息

基于对现行高炉炼铁-氧气转炉炼钢生产工艺的讨论,提出了"铁氧化物精细还原-非熔态分离"的新工艺。研究中设计、改进了精细还原实验装置,分别设计L1.(2.5)和L4(2.)正交表进行了喀左磁铁矿和某厂炼钢粉尘的精细还原实验以研究微米级铁氧化物的还原特性,实验结果表明:在1.000℃以下,使用纯H2.CO对微米级粒度铁氧化物进行精细还原,能实现铁氧化物向金属铁的高度转变。对铁氧化物还原产物解离性、烧结性、铁磁性的研究表明,较低的还原温度使得铁氧化物于非熔化状态下被还原成磁性金属铁,未有烧结现象发生,还原产物中铁元素与杂质元素分别存在,为采用物理方法将铁氧化物精细还原产物中磁性铁元素与杂质元素的进一步分离提供了依据。

关键词：精细还原非熔态分离铁矿粉炼钢粉尘

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基于深度学习的代码生成方法研究进展

软件学报 2024年第2期35卷 604-628页

作者：杨泽洲陈思榕高翠芸李振昊李戈吕荣聪哈尔滨工业大学(深圳)计算机科学与技术学院广东深圳518055 华为技术有限公司广东深圳518129 北京大学信息科学技术学院北京100871 香港中文大学计算机与工程系中国香港99907

关注根据自然语言描述生成相关代码片段的代码生成(code generation)任务.在软件开发过程中,开发人员常常会面临两种情形.一种是通用功能的实现,需要开发人员编写大量重复且技术含量较低的代码;另一种是依赖于特定任务要求,需要开发人... 详细信息

关注根据自然语言描述生成相关代码片段的代码生成(code generation)任务.在软件开发过程中,开发人员常常会面临两种情形.一种是通用功能的实现,需要开发人员编写大量重复且技术含量较低的代码;另一种是依赖于特定任务要求,需要开发人员查询文档或使用其他工具才能完成的代码编写工作.代码生成作为最直接辅助开发人员完成编码的工作受到学术界和工业界的广泛关注.让机器理解用户需求,自行完成程序编写也一直是软件工程领域重点关注的问题之一.近年来,随着深度学习在软件工程领域任务中的不断发展,尤其是预训练模型的引入使得代码生成任务取得了十分优异的性能.系统梳理当前基于深度学习的代码生成相关工作,并将目前基于深度学习的代码生成方法分为3类:基于代码特征的方法、结合检索的方法以及结合后处理的方法.第1.是指使用深度学习算法利用代码特征进行代码生成的方法,第{1.和第3类方法依托于第1.方法进行改进.依次对每一类方法的已有研究成果进行系统的梳理、分析与总结.除此之外,汇总并分析已有的代码生成工作中常用的语料库与评估方法,以便于后续研究进行实验设计.最后,对代码生成方法研究进展进行总结,并针对未来值得关注的研究方向进行展望.

关键词：代码生成深度学习代码检索后处理机器翻译