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Nanomaterials for electrochemical energy storage

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Frontiers of physics 2014年第3期9卷 323-350页

作者： Nian Liu Weiyang Li Mauro Pasta yi cui Department of Chemistry Stanford University Stanford CA 94305 USA Department of Materials Science and Engineering Stanford University Stanford CA 94305 USA Stanford Institute for Materials and Energy Sciences SLAC National Accelerator Laboratory 2575 Sand Hill Road Menlo Park CA 94025 USA

The development of nanotechnology in the past two decades has generated great capability of controlling materials at the nanometer scale and has enabled exciting opportunities to design materials with desirable electronic, ionic, photonic, and mechanical properties. This development has also contributed to tile advance in energy storage, which is a critical technology in this century. In this article, we will review how the rational design of nanostructured materials has addressed the challenges of batteries and electrochemical capacitors and led to high-performance electrochemical energy storage devices. Four specific material systems will be discussed： i） nanostructured alloy anodes for Li-batteries, ii） nanostructured sulfur cathodes for Li-batteries, iii） nanoporous open- framework battery electrodes, and iv） nanostructured electrodes for electrochemical capacitors.

关键词： nanomaterial energy storage silicon anode sulfur cathode stationary battery electrochemical capacitors

BPR-UserRec:a personalized user recommendation method in social tagging systems

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The Journal of China Universities of Posts and Telecommunications 2013年第1期20卷 122-128页

作者： YANG Tan cui yi-dong JIN Yue-hui State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications

Social tagging is one of the most important characteristics of Web 2.0 services, and social tagging systems （STS） are becoming more and more popular for users to annotate, organize and share items on the Web. Moreover, online social network has been incorporated into social tagging systems. As more and more users tend to interact with real friends on the Web, personalized user recommendation service provided in social tagging systems is very appealing. In this paper, we propose a personalized user recommendation method, and our method handles not only the users＇ interest networks, but also the social network information. We empirically show that our method outperforms a state-of-the-art method on real dataset from *** dataset and Douban.

关键词： social tagging systems user recommendation tensor factorization

Sonochemical Synthesis of Graphene Oxide-Wrapped Gold Nanoparticles Hybrid Materials:Visible Light Photocatalytic Activity

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中国化学:英文版 2015年第1期33卷 119-124页

作者： yi cui Ding Zhou Zhuyin Sui Baohang Han National Center for Nanoscience and Technology Beijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Graphene oxide(GO)-wrapped gold nanoparticles(Au NPs)hybrid materials are constructed via one-pot sono-chemical synthesis and self-assembly,using ethylene glycol as the reducing *** synthesis process above took only 1 h,and the obtained hybrid materials exist as spheres wrapped with gauze-like GO sheets via ionic in-teraction-based *** GO sheets are helpful for the well dispersion of the Au ***,these materials possess enhanced photocatalytic activity under visible light irradiation,owing to the synergistic effect of the two components in the hybrid *** work may provide a convenient approach to control the size and morphology of the Au NPs for the synthesis of GO-wrapped hybrid materials,which opens up a feasible way to synthesize metal NPs/GO ***,this method might lead to developing of a broad class of new functionalized materials wrapped with GO sheets.

关键词： graphene oxide gold nanoparticle sonochemical synthesis metal hybrid material photocatalysis

UV⁃B辐射增强和氮添加及其互作对空心莲子草-马唐竞争的影响

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西南农业学报 2024年第2期37卷 344-352页

作者：吴昊姜俊慧罗莉崔益萌张婉莹信阳师范大学生命科学学院河南信阳464000 河南大别山森林生态系统国家野外科学观测研究站郑州450046 信阳生态研究院河南信阳464000

【目的】以入侵种空心莲子草(Alternanthera philoxeroides)与本土伴生种马唐(Digitaria sanguinalis)为研究对象,探讨UV⁃B辐射、施氮及其交互效应对二者竞争的影响,以期为全球变化下的入侵植物防治提供科学依据。【方法】依据de Wit取... 详细信息

【目的】以入侵种空心莲子草(Alternanthera philoxeroides)与本土伴生种马唐(Digitaria sanguinalis)为研究对象,探讨UV⁃B辐射、施氮及其交互效应对二者竞争的影响,以期为全球变化下的入侵植物防治提供科学依据。【方法】依据de Wit取代试验法,在单种、混种盆栽模式下分别设置处理方式(施氮、UV⁃B辐射、施氮×UV⁃B辐射)、物种属性(空心莲子草、马唐)2个因子,测定各处理组合下的植物总生物量、形态、色素及光合荧光等指标,并采用二因素方差分析和LSD多重比较法分析以上各指标差异。【结果】①单种模式中,施氮导致植物最大茎长和马唐叶面积显著增加207.154%和297.643%、空心莲子草总生物量及稳态光适应光化学猝灭系数(qp_Lss)显著降低40.612%和52.381%;UV⁃B辐射导致植物最大茎长、空心莲子草最大光量子产率(QY_max)及稳态光量子效率(QY_Lss)显著增加117.607%、404.459%和835.714%,导致马唐QY_Lss显著降低45.605%;施氮×UV⁃B辐射导致空心莲子草总生物量及马唐QY_max显著降低79.310%和18.984%,空心莲子草QY_max显著增加685.350%,施氮×UV⁃B辐射还使得空心莲子草暗适应后最小荧光(F_(0))下降而QY_Lss增加、马唐F_(0)增加而QY_Lss下降。②混种模式中,施氮导致马唐叶面积及其叶绿素a指数(Chla)显著增加254.259%和53.018%,导致空心莲子草根长及其Chla显著降低76.051%和12.084%;UV⁃B辐射导致空心莲子草Chla显著增加45.434%;施氮×UV⁃B辐射导致空心莲子草根长显著降低58.824%。【结论】施氮相对增加了马唐在生物量及形态上的优势,但UV⁃B辐射削弱马唐光合活性而增加空心莲子叶绿素含量;且UV⁃B辐射、施氮×UV⁃B辐射交互作用显著提升空心莲子草的实际光化学效率。全球变化下应加强空心莲子草入侵监控,以防多类因子交互效应加剧其对于本土植物的竞争替代。

关键词：空心莲子草竞争氮素植物入侵光合荧光 UV⁃B辐射

Near Ambient Pressure Adsorption of Nickel Carbonyl Contaminated CO on Cu(111) Surface

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Chinese Journal of Chemical Physics 2019年第6期32卷 753-759,I0003页

作者： Rui Wang Ding Ding Wei Wei yi cui Vacuum Interconnected Worksation Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of ScienceSuzhou 215123China Nano Science and Technology Institute University of Science and Technology of ChinaHefei 230026China

Formation of volatile nickel carbonyls with CO in catalytic reaction is one of the mechanisms of catalyst deactivation. CO is one of the most popular probe molecules to study the surface properties in model catalysis. Under ultra-high vacuum (UHV) conditions, the problem of nickel carbonyl impurity almost does not exist in the case that a high purity of CO is used directly. While in the near ambient pressure (NAP) range, nickel carbonyl is easily found on the surface by passing through the Ni containing tubes. Here, the NAP techniques such as NAP-X-ray photoelectron spectroscopy and NAP-scanning tunneling microscopy are used to study the adsorption of nickel carbonyl contaminated CO gas on Cu(111) surface in UHV and NAP conditions. By controlling the pressure of contaminated CO, the Ni-Cu bimetallic catalyst can form on Cu(111) surface. Furthermore, we investigate the process of CO adsorption and dissociation on the formed Ni-Cu bi-metal surface, and several high-pressure phases of CO structures are reported. This work contributes to understanding the interaction of nickel carbonyl with Cu(111) at room temperature, and reminds the consideration of CO molecules contaminated by nickel carbonyl especially in the NAP range study.

关键词： Nickel carbonyl Carbon monoxide Cu(111) Near ambient pressure X-ray photoelectron spectroscopy Near ambient pressure scanning tunneling microscopy

浅析高职院校专业课程的改革——以“智能建造技术与应用”为例

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浙江工商职业技术学院学报 2024年第2期23卷 86-89页

作者：崔逸琼柴美娟浙江工商职业技术学院浙江宁波315012

智能建造与数字技术改变了传统建造方式和行业认知,推动着建筑行业的数字化革命。为适应这一变革,教师需要不断创新教学手段,将新技术融入课程教学,与行业发展前沿对接。现以“智能建造技术与应用”课程为例,探讨在智慧建造背景下的课... 详细信息

智能建造与数字技术改变了传统建造方式和行业认知,推动着建筑行业的数字化革命。为适应这一变革,教师需要不断创新教学手段,将新技术融入课程教学,与行业发展前沿对接。现以“智能建造技术与应用”课程为例,探讨在智慧建造背景下的课程教学改革,旨在为其他专业课程改革提供启示。

关键词：智能建造数字技术课程改革

Anterolateral thigh free flap for simultaneous reconstruction of digital extensor tendon and defect of the dorsal hand： A case report

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Chinese Journal of Traumatology 2016年第5期19卷 309-310页

作者： Man-yi cui Hui Shen Burns and Plastic Surgery Department Taixing People's Hospital Taixing 225400 China

This paper describes a new technique in the repair of the hand defect with digital extensor tendon injury. The anterolateral thigh flap with the thick femoral fascia has been used in the reconstruction of the composite defect of the dorsal hand, especially the defect of tendon. This technique requires short period of treatment and hence causes less damage to the donor site but shows a better recovery of the hand function. A favorable curative effect has been obtained in this patient.

关键词： Free tissue flaps Tendons Hand Reconstructive surgical procedures

Experimental study on the moving characteristics of fine grains in wide grading unconsolidated soil under heavy rainfall

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Journal of Mountain Science 2017年第3期14卷 417-431页

作者： cui yi-fei ZHOU Xiao-jun GUO Chao-xu Department of Civil and Environmental Engineering Hong Kong University of Science and TechnologyClear Water BayHong KongChina China Merchants Chongqing Communications Research&Design Institute Chongqing 400067China Fujian Academy of Building Research Pujian Key Laboratory of Green Building TechnologyFuzhou 350025China Fuzhou University Fuzhou 350108China

The initiation mechanism of debris flow is regarded as the key step in understanding the debrisflow processes of occurrence, development and damage. Moreover, migration, accumulation and blocking effects of fine particles in soil will lead to soil failure and then develop into debris flow. Based on this hypothesis and considering the three factors of slope gradient, rainfall duration and rainfall intensity, 16 flume experiments were designed using the method of orthogonal design and completed in a laboratory. Particle composition changes in slope toe, volumetric water content, fine particle movement characteristics and soil failure mechanism were analyzed and understood as follows: the soil has complex, random and unstable structures, which causes remarkable pore characteristics of poor connectivity, non-uniformity and easy variation. The major factors that influence fine particle migration are rainfall intensity and slope. Rainfall intensity dominates particle movement, whereby high intensity rainfall induces a large number of mass movement and sharp fluctuation, causing more fine particles to accumulate at the steep slope toe. The slope toe plays an important role in water collection and fine particleaccumulation. Both fine particle migration and coarse particle movement appears similar fluctuation. Fine particle migration is interrupted in unconnected pores, causing pore blockage and fine particle accumulation, which then leads to the formation of a weak layer and further soil failure or collapses. Fine particle movement also causes debris flow formation in two ways: movement on the soil surface and migration inside the soil. The results verify the hypothesis that the function of fine particle migration in soil failure process is conducive for further understanding the formation mechanism of soil failure and debris flow initiation.

关键词： Wide grading unconsolidated soil Fine particle migration Soil failure Landslide Debris flow initiation Flume test Heavy rainfall

Fast algorithms of public key cryptosystem based on Chebyshev polynomials over finite field

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The Journal of China Universities of Posts and Telecommunications 2011年第2期18卷 86-93页

作者： LI Zhi-hui cui yi-dong XU Hui-min Key Laboratory of Trustworthy Distributed Computing and Service Ministry of Education Beijing University of Posts and Telecommunications Beij ing 100876 China School of Information and Communication engineering Beijing University of Posts and Telecommunications Beijing 100876 China

The computation of Chebyshev polynomial over finite field is a dominating operation for a public key *** generic algorithms with running time of have been presented for this computation：the matrix algorithm and the characteristic polynomial algorithm,which are feasible but not *** this paper,these two algorithms are modified in procedure to get faster execution *** complexity of modified algorithms is still,but the number of required operations is reduced,so the execution speed is ***,a new algorithm relevant with eigenvalues of matrix in representation of Chebyshev polynomials is also presented,which can further reduce the running time of that computation if certain conditions are *** implementations of these algorithms are realized,and the running time comparison is *** an efficient scheme for the computation of Chebyshev polynomial over finite field is presented.

关键词： Chebyshev polynomial algorithm running time square root