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Trace element tectonic discrimination of granitoids:inspiration from big data analytics

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Big Earth Data 2023年第4期7卷 1094-1119页

作者： Wan-Feng Chen qi Zhang Jing Yang Er-Teng Wang gao-rui Song Shou-Tao Jiao Jie Yuan College of Geography and Tourism Hunan University of Arts and ScienceChangdeChina blnstitute of Geology and Geophysics Chinese Academy of SciencesBeijingChina School of Earth Sciences Lanzhou UniversityKey Laboratory of Mineral Resources in Western ChinaLanzhouGansuChina Development Research Center China Geological SurveyBeijingChina Technology Innovation Center of Geological Information MNRBeijingChina School of Resources and Environment Xingtai UniversityXingtaiHebeiChina

The tectonic environment of granitoids has always been a concern of the academic *** Nb vs.Y and Rb ***+Y diagrams have had a substantial *** present work uses more than 110,000 granitoid samples(SiO_(2)≥56%)from the globally shared database to discuss the validity and also explain why these diagrams used for discrimination between the different tectonic settings of granitoid *** amount of data from the spreading center is sparse and the data are highly scattered and so,the present study focuses mainly on granites from the ocean islands and convergent margins tectonic *** the TAS diagram most of the ocean island data are alkaline series and trachybasalt series,and some are *** contrast,the granitoids on the convergent margin are mainly *** work shows that the tectonic discrimination diagrams of granitoids remain valid,and only the boundaries need to be slightly adjusted.

关键词： Spreading center Ocean Island Apenninic-Maghrebides chain tectonic discrimination granitoids convergent margin

A collaborative strategy for enhanced reduction of Cr(Ⅵ) by Fe(0) in the presence of oxalate under sunlight:Performance and mechanism

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Journal of Environmental Sciences 2020年第4期32卷 385-394页

作者： qi Zhou Yang Li Heng Yang Yun gao College of Chemistry and Chemical Engineering Anhui UniversityHefei 230601China Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control School of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Chengdu Integrated Testing Center of Rocks and Ores Sichuan Geology and Mineral Exploration and Development BureauChengdu 610081China Anhui Electric Power Construction Second Engineering Co.Ltd. China Energy Construction GroupHefei 230000China

Nanometer-size zero-valent iron(NZVI)is an efficient reducing agent,but its surface is easily passivated with an oxide layer,leading to reaction *** our study,oxalate(OA)was introduced into this heterogeneous system of NZVI,which could form ferrioxalate complexes with the NZVI surface-bound Fe3+and dissolved Fe3+in the *** of ferrioxalate complexes can facilitate the generation of Fe2+from Fe3+and CO2·-radical,both species have strong reduction ***,a"photo-oxalate-Fe(0)"system through sunlight induction was established,which not only prohibited the formation of a surface passivation layer,but also displayed a synergetic mechanism of ferrioxalate photolysis to enhance reduction,exhibiting remarkably higher degradation activity(several times faster)toward the model pollutant Cr(Ⅵ)than the mechanism with NZVI *** tests suggested that both NZVI dosage and OA content markedly affected the reduction *** pH was beneficial to the reduction ***,recyclability experiment showed that the reduction rate decreased from 0.21706 to 0.03977 min-1 after three cycles of reuse due to the NZVI losing reaction activity generally,but the system still maintained considerable reduction ***,a mechanism was revealed whereby NZVI would transform to Fe oxides after the exhaustion of its reductive power,and the photolysis of ferrioxalate to promote the cycling of iron species played the predominant role in providing extra reduction *** features confirm that introduction of OA into Cr(Ⅵ)reduction by NZVI through sunlight induction is advantageous and promising.

关键词： Nanometer-size zero-valent iron Oxalate Sun irradiation Photolysis of ferrioxalate Cycling of surface iron Synergetic mechanism

Crystal Structure, Characterization and Enhanced Solubility of Ibuprofen by 2-Methylimidazolium Salt

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Chinese Journal of Structural Chemistry 2019年第7期38卷 1129-1135页

作者： ZHANG Xian-rui gao Lei School of Chemical Engineering and Resource Recycling Wuzhou University

Novel crystalline forms of ibuprofen(IBU) with 2-methylimidazole(2 MI) in a 1:1 molar ratio was synthesized by liquid-assisted grinding technique and characterized by single-crystal X-ray diffraction, infrared spectral(IR), powder X-ray diffraction(PXRD),differential scanning calormetry(DSC) and Hirshfeld surface analysis. The structure of IBU-2 MI salt is assembled via N(1)–H(1)+···O1 and N(2)–H(2)+···O(2) hydrogen bonds to form the zigzag-like 1 D chain structure. The original purpose was to solve the pH-dependent solubility defect of ibuprofen, and the result of pH dependent solubility experiments showed that the IBU-2 MI salt had a better solubility at the wide range of pH 4.00 to 9.18. Furthermore, the solubility of IBU-2 MI salt exhibits a dramatic increase(30-fold) in aqueous mediums.

关键词： ibuprofen 2-methylimidazole solubility salt X-ray diffraction

Investigations on the Effect of Electrical Contact Degradation on High Speed Wide-Band Signal Integrity

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Chinese Journal of Electronics 2020年第3期29卷 525-532页

作者： WANG Ziren gao Jinchun JI rui BILAL Hafiz Muhammad Beijing Key Laboratory of Work Safety Intelligent Monitoring School of Electronic Engineering Beijing University of Posts and Telecommunications China Academy of Information and Communication Technology

Electrical contact degradation will affect the signal integrity resulting in poor communication performance. In the present work, the effect of electrical contact degradation on wide-band digital signal integrity was studied using both the theoretical analysis and experimental testing. The characteristics of digital signals with rise times of 200 ps, 400 ps, 600 ps and 800 ps through connectors with different degradation levels were *** maximum bandwidth of these signals can reach up to 1.75 GHz. An equivalent model of the connector with degraded contact surface was developed and the experimental results are consistent with the model results approximately. The influence of capacitance characteristics caused by degraded contact surface on digital signal waveform was calculated and analyzed. The results of this paper are helpful in developing a better understanding of the characteristics of wide-band digital signal waveforms through the degraded contact surface and provide a theoretical support to identify failure features in fault diagnosis.

关键词： Contact degradation Signal integrity High speed wideband signal Capacitive coupling

Scalarizations for Approximate Quasi Efficient Solutions in Multiobjective Optimization Problems

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Journal of the Operations Research Society of China 2015年第1期3卷 69-80页

作者： rui-Xue Yue Ying gao Department of Mathematics Chongqing Normal UniversityChongqing 400047China

In this paper,by reviewing two standard scalarization techniques,a new necessary and sufficient condition for characterizing(ε,.ε)-quasi(weakly)efficient solutions of multiobjective optimization problems is *** proposed procedure for the computation of(ε,.ε)-quasi efficient solutions is *** that all of the provided results are established without any convexity assumptions on the problem under *** our results extend several corresponding results in multiobjective optimization.

关键词： Multiobjective optimization problems Approximate quasi efficeint solutions Nonlinear scalarizations

Plasmonic nanostructures acting as a light-driven O_(2)-sensitive nitroreductase mimic for enhanced photochemical oxidation of para-aminothiophenol

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Nano Research 2023年第11期16卷 12697-12705页

作者： Xinshuang gao Jia-jia Zheng Hanbo Li rui Cai Xingfa gao Xiaochun Wu CAS Key Laboratory of Standardization and Measurement for Nanotechnology National Center for Nanoscience and TechnologyBeijing 100190China Laboratory of Theoretical and Computational Nanoscience National Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Nanozymes,as a novel form of enzyme mimics,have garnered considerable *** overcoming the main disadvantages of their natural analogs,they still face challenges such as restricted mimic types and low substrate ***,we introduce a reactive ligand modification strategy to diversify enzyme mimic ***,we have utilized helical plasmonic nanorods(HPNRs)modified with para-nitrothiophenol(4-NTP)to create an oxygen-sensitive nitroreductase(NTR)with *** act as a light-adjustable source of nicotinamide adenine dinucleotide/nicotinamide adenine dinucleotide phosphate(NAD(P)H),providing photon-generated energetic electrons to adsorbed 4-NTP *** the presence of O_(2),the activated 4-NTP transfers the captured electron to the adsorbed O_(2),mimicking the electron transfer process in its natural *** enhanced O_(2)activation notably boosts the oxidative coupling of para-aminothiophenol(4-ATP).Density functional theory(DFT)calculations reveal that hot electrons injected into the lowest unoccupied molecular orbital(LUMO)energy level of 4-NTP can be transferred to that of molecular *** conclusion,our findings underline the potential of the reactive ligand modification strategy in developing new types of enzyme reactions,which opens up promising avenues for the enhancement and diversification of nanozyme functionalities.

关键词： plasmonic nanostructure nanozyme nitroreductase para-nitrothiolphenol hot electron injection para-aminothiolphenol

Recent advances in Fe-N-C-and Co-N-C-based materials as bifunctional electrocatalysts for oxygen reduction and oxygen evolution

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Science China Chemistry 2024年第4期67卷 1137-1160页

作者： Hui-Min Xu Hong-rui Zhu Chen-Jin Huang Zhi-Jie Zhang Ting-Yu Shuai qi-Ni Zhan gao-Ren Li College of Materials Science and Engineering Sichuan UniversityChengdu 610065China

Fe-nitrogen-carbon(Fe-N-C)-and Co-nitrogen-carbon(Co-N-C)-based electrocatalysts have been widely concerned because of their high OER/ORR activity,low metal cost,and simple *** exploration of Fe-N-C and Co-N-C single atombased catalysts with high activity and stability to overcome the slow kinetics of oxygen reduction and oxygen evolution reactions is also the key to the development of efficient electrolytic water,fuel cells,and rechargeable metal-air ***-N-C and Co-N-C single atom-based electrocatalysts have the advantages of a high utilization rate of metal atoms and high electrocatalytic activity,and are ideal catalysts for promoting electrochemical energy conversion and *** general principles of designing Fe-N-C and Co-N-C single atom-based electrocatalysts are reviewed in this ***,the strategies to improve the bifunctional catalytic activity and stability are ***,the challenges and prospects of Fe-N-C and Co-N-C single atom-based catalysts are well *** review will provide a reference for the directed optimization of Fe-N-C and Co-N-C single atom-based catalysts.

关键词： Fe-N-C Co-N-C single atom bifunctional oxygen electrocatalysts

Congestion warning method based on the Internet of vehicles and community discovery of complex networks

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The Journal of China Universities of Posts and Telecommunications 2016年第4期23卷 37-45页

作者： Zhao Ting Wang Bin gao qi School of Automation Beijing Institute of Technology

The traffic congestion occurs frequently in urban areas, while most existing solutions only take effects after congesting. In this paper, a congestion warning method is proposed based on the Internet of vehicles（IOV） and community discovery of complex networks. The communities in complex network model of traffic flow reflect the local aggregation of vehicles in the traffic system, and it is used to predict the upcoming congestion. The real-time information of vehicles on the roads is obtained from the IOV, which includes the locations, speeds and orientations of vehicles. Then the vehicles are mapped into nodes of network, the links between nodes are determined by the correlations between vehicles in terms of location and speed. The complex network model of traffic flow is hereby established. The communities in this complex network are discovered by fast Newman（FN） algorithm, and the congestion warnings are generated according to the communities selected by scale and density. This method can detect the tendency of traffic aggregation and provide warnings before congestion occurs. The simulations show that the method proposed in this paper is effective and practicable, and makes it possible to take action before traffic congestion.

关键词： IOV complex network community discovery congestion warning

Design and Synthesis of Macrocyclic Polyoxazoles

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Chemical Research in Chinese Universities 2014年第4期30卷 587-592页

作者： qi Fuling gao Lianxun HAN Fushe Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changehun 130022 P. R. China University of Chinese Academy of Sciences Beijing 100864 P. R. China

Two macrocyclic polyoxazoles with different sizes and numbers of side chains were designed and synthesized from the linear-type precursors obtained by the iterative application of oxazole formation reaction via effect... 详细信息

关键词： Telomerase Telomestatin G-Quadruplex Macrocyclic compound Polyoxazole