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Frontiers of Chemical Science and Engineering 2023年第1期17卷 15-23页

作者： qi Qu Chuan Zeng Jing Huang Mengfan Wang Wei Qi Zhimin He School of Chemical Engineering and Technology State Key Laboratory of Chemical EngineeringTianjin UniversityTianjin 300072China School of Life Sciences Tianjin UniversityTianjin 300072China Co-Innovation Centre of Chemistry and Chemical Engineering of Tianjin Tianjin 300072China Tianjin Key Laboratory of Membrane Science and Desalination Technology Tianjin 300350China Technical Centre of Gongbei Customs District of China Zhuhai 519000China

Recently,various semiconductor/metal composites have been developed to fabricate surfaceenhanced Raman spectroscopy substrates.However,low metal loading on semiconductors is still a challenge.In this study,cystine was introduced to increase the accumulation of gold nanoparticles on zinc oxide,owing to the biomineralization_property of_cystine.Morphological analysis revealed that the obtained ZnO/Au/cystine composite not only had a higher metal loading but also formed a porous structure,which is beneficial for Raman performance.Compared with ZnO/Au,the ZnO/Au/cystine substrate displayed a 40-fold enhancement in the Raman signal and a lower limit of detection(10^(-11) mol·L^(-1))in the detection of rhodamine 6G.Moreover,the substrate has favorable homogeneity and stability.Finally,ZnO/Au/cystine displayed excellent performance toward crystal violet and methylene blue in a test based on river water samples.This study provided a promising method to fabricate sensitive semiconductor/noblemetal-based surface-enhanced Ramans spectroscopy substrates for Raman detection.

关键词： biomineralization cystine semiconductor/metal composite SERS detection Raman detection

On Skew Polycyclic Codes over Z4[u]/2-2>

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Journal of Mathematical Research with Applications 2023年第2期43卷 241-252页

作者： Wei Qi Xiaolei ZHANG School of Mathematics and Statistics Shandong University of Technology

In this paper, we investigate some classes of skew polycyclic codes and polycyclic codes over R = Z4[u]/. We first obtain the generator polynomials of all(1, 2u)-polycyclic codes over R. Then, by defining some Gray maps, we show that the images of(skew)(1, 2u)-polycyclic codes over R are cyclic or quasi-cyclic with index 2 over Z4. Finally, an example of some(1, 2u)-polycyclic codes over R is given to exhibit the main results of the paper.

关键词： skew polycyclic code polycyclic code cyclic code generator polynomial Gray map

Primary amine coupling on nanocarbon catalysts: Reaction mechanism and kinetics via fluorescence probe analysis

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Green Energy & Environment 2020年第4期5卷 453-460页

作者： Fan Li Xueya Dai Wei Qi Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

Non-metallic nanocarbon materials catalyzed coupling reactions of primary amines to produce imine is an efficient,green and sustainable synthetic route,which has a wide application prospect in fine chemicals or pharmaceutical molecules.In the present study,we show firstly the relatively high catalytic activity of graphene oxide in the reaction of oxidative coupling of benzylamine(OCB),which is even comparable with typical metal-based catalysts,indicating the great potential of nanocarbon materials in this reaction system.More importantly,a novel twophoton fluorescence probe molecule(N-propyl-4-hydrazinyl-1,8-naphthalimide,NA)with special chemical structure of hydrazine functionality was synthesized.The probe NA could selectively react with aldehyde or ketone compounds,leading to the photoluminescence enhancement via inhibition of photo induced electron transfer(PET)process.The synthesized NA was applied as probe in carbon catalyzed OCB system to predict the existence of reaction intermediate benzaldehyde(BA),indicating the reaction pathway of oxidation-deamination-condensation in nanocarbon catalyzed OCB process.The proposed luminescence-probe strategy for revealing the kinetics and mechanism may also shed light in other reaction systems concerning the intermediates or products of ketones or aldehydes.

关键词： Nanocarbon Benzylamine coupling reaction Fluorescence probe Reaction mechanism

Comprehensive Evaluation Method for Traffic Flow Data Quality Based on Grey Correlation Analysis and Particle Swarm Optimization

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Journal of Systems Science and Systems Engineering 2024年第1期33卷 106-128页

作者： wei Ba Baojun Chen qi Li School of Automation and Electrical Engineering Dalian Jiaotong UniversityDalian116028China Faculty of Electronic Information and Electrical Engineering Dalian University of TechnologyDalian116023China

Nowadays,data are more and more used for intelligent modeling and prediction,and the comprehensive evaluation of data quality is getting more and more attention as a necessary means to measure whether the data are usable or not.However,the comprehensive evaluation method of data quality mostly contains the subjective factors of the evaluator,so how to comprehensively and objectively evaluate the data has become a bottleneck that needs to be solved in the research of comprehensive evaluation method.In order to evaluate the data more comprehensively,objectively and differentially,a novel comprehensive evaluation method based on particle swarm optimization(PSO)and grey correlation analysis(GCA)is presented in this paper.At first,an improved GCA evaluation model based on the technique for order preference by similarity to an ideal solution(TOPSIS)is proposed.Then,an objective function model of maximum difference of the comprehensive evaluation values is built,and the PSO algorithm is used to optimize the weights of the improved GCA evaluation model based on the objective function model.Finally,the performance of the proposed method is investigated through parameter analysis.A performance comparison of traffic flow data is carried out,and the simulation results show that the maximum average difference between the evaluation results and its mean value(MDR)of the proposed comprehensive evaluation method is 33.24%higher than that of TOPSIS-GCA,and 6.86%higher than that of GCA.The proposed method has better differentiation than other methods,which means that it objectively and comprehensively evaluates the data from both the relevance and differentiation of the data,and the results more effectively reflect the differences in data quality,which will provide more effective data support for intelligent modeling,prediction and other applications.

关键词： Data quality comprehensive evaluation particle swarm optimization grey correlation analysis traffic flow data

Experimental and mechanistic study of dispersed micrometer-sized particle resuspension in a square straight duct with rough walls

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Particuology 2023年第12期83卷 101-114页

作者： qi Sun Suyuan Yu wei Peng Institute of Nuclear and New Energy Technology Cooperation Innovation Center of Advanced Nuclear Energy TechnologyKey Laboratory of Advanced Reactor Engineering and Safety of Ministry of EducationTsinghua UniversityBeijing100084China Center for Combustion Energy Key Laboratory for Thermal Science and Power Engineering of the Ministry of EducationDepartment of Energy and Power EngineeringTsinghua UniversityBeijing100084China

The resuspension of graphite dust is an important phenomenon in the release of radioactivity and the safety of nuclear reactors during severe accidents.In this study,a visualization experimental platform is constructed to study effects of particle size,flow velocity,and wall roughness on the resuspension characteristics of graphite particles.A statistical model of particle resuspension applicable to monolayer dispersed particles is developed based on the moment equilibrium of the particles and the flow field characteristics,as calculated by the large-eddy simulation framework.The results show that particle resuspension can be divided into short-and long-term resuspension stages.Most particle resuspension occurs during the short-term stage.With increases in flow velocity and particle diameter,the aerodynamic or adhesion force acting on the particles increases,and corresponding particle resuspension fraction increases.The influence of rough walls on particle resuspension is related to both the force on the particles and the arm ratio between the wall morphology and the particle diameter.A comparison with the experimental results demonstrates that the particle resuspension model developed in this study accurately predicts the impact of flow velocity,particle size,and wall roughness on particle resuspension.

关键词： Particle resuspension Statistical model Moment equilibrium High temperature gas-cooled reactor(HTGR)

Two-Machine Hybrid Flow-Shop Problems in Shared Manufacturing

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Computer Modeling in Engineering & Sciences 2022年第5期131卷 1125-1146页

作者： qi wei Yong Wu Ningbo University of Finance&Economics Ningbo315175China

In the“shared manufacturing”environment,based on fairness,shared manufacturing platforms often require manufacturing service enterprises to arrange production according to the principle of“order first,finish first”which leads to a series of scheduling problems with fixed processing sequences.In this paper,two two-machine hybrid flow-shop problems with fixed processing sequences are studied.Each job has two tasks.The first task is flexible,which can be processed on either of the two machines,and the second task must be processed on the second machine after the first task is completed.We consider two objective functions:to minimize the makespan and tominimize the total weighted completion time.First,we show the problem for any one of the two objectives is ordinary NP-hard by polynomial-time Turing Reduction.Then,using the Continuous ProcessingModule(CPM),we design a dynamic programming algorithm for each case and calculate the time complexity of each algorithm.Finally,numerical experiments are used to analyze the effect of dynamic programming algorithms in practical operations.Comparative experiments show that these dynamic programming algorithms have comprehensive advantages over the branch and bound algorithm(a classical exact algorithm)and the discrete harmony search algorithm(a high-performance heuristic algorithm).

关键词： Hybrid flow-shop dynamic programming algorithm computational complexity numerical experiments shared manufacturing

Rapid and specific detection of norepinephrine via a “hunting-shooting” strategy

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Science China Chemistry 2023年第4期66卷 923-925页

作者： qi-wei Zhang Yang Tian Shanghai Key Laboratory of Green Chemistry and Chemical Processes Department of ChemistrySchool of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200241China

Neurotransmitters are important endogenous chemicals in the central and sympathetic nervous system of organisms,which play an important role in maintaining physiological processes,such as the signaling,neuromodulation... 详细信息

关键词： metabolism endogenous sympathetic

Transcatheter arterial chemoembolization followed by surgical resection for hepatocellular carcinoma: a focus on its controversies and screening of patients most likely to benefit

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Chinese Medical Journal 2021年第19期134卷 2275-2286页

作者： Zhan-qi wei Yue-wei Zhang School of Medicine Tsinghua UniversityHaidian DistrictBeijing 100084China Beijing Tsinghua Changgung Hospital School of Clinical MedicineTsinghua UniversityBeijing 102218China

Surgical resection(SR)is recommended as a radical procedure in the treatment of hepatocellular carcinoma(HCC).However,postoperative recurrence negatively affects the long-term efficacy of SR,and preoperative adjuvant therapy has therefore become a research hotspot.Some clinicians adopt transcatheter arterial chemoembolization(TACE)as a preoperative adjuvant therapy in patients undergoing SR to increase the resection rate,reduce tumor recurrence,and improve the prognosis.However,the findings of the most relevant studies remain controversial.Some studies have confirmed that preoperative TACE cannot improve the long-term survival rate of patients with HCC and might even negatively affect the resection rate.Which factors influence the efficacy of preoperative TACE combined with SR is a topic worthy of investigation.In this review,existing clinical studies were analyzed with a particular focus on several topics:screening of the subgroups of patients most likely to benefit from preoperative TACE,exploration of the optimal treatment regimen of preoperative TACE,and determination of the extent of tumor necrosis as the deciding prognostic factor.

关键词： Hepatocellular carcinoma Surgical resection Transcatheter arterial chemoembolization Adjuvant therapy

Metal nanozymes with multiple catalytic activities: regulating strategies and biological applications

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Rare Metals 2023年第9期42卷 2928-2948页

作者： qi Yang Yuan-Yang Mao Quan Liu wei-wei He Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province Institute of Surface Micro and Nano MaterialsCollege of Chemical and Materials EngineeringXuchang UniversityXuchang461000China

Nanozymes with high enzyme-like catalytic activity have been recognized as promising alternatives for nature enzymes and exhibit great potentials in biodetection,disease diagnosis and treatment. Metal nanozyme is an important member of the nanozyme family. When metal nanozymes are controllably regulated by compositions,sizes, morphologies, crystal defects, surface states or stimulated by diversified external fields, they will acquire unique geometric and electronic structures and exhibit various physical/chemical properties in catalytic behaviors.Although significant progress has been made in metal nanozymes, there is still large space for further improving the catalytic efficiency, developing the synthetic process for large-scale production, facilitating the clinical transformation and exploring the untapped applications.Directing at these issues, rational design of novel nanozymes for better applications and deeper understanding of catalytic mechanisms are urgently required. Accordingly,this review focuses on the recent advances on regulating strategies, catalytic mechanisms and relevant biological applications of metal nanozymes with multiple enzymelike performance. Furthermore, future perspectives are outlooked to inspire more attention and efforts on this interesting multi-disciplinary field.

关键词： Metal nanozymes Catalytic mechanism Regulating strategy Grain orientation Disease treatment

Radical SAM-Dependent Demetallation of Heme

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Chinese Journal of Chemistry 2022年第9期40卷 1053-1058页

作者： Jinduo Cheng wei Ding qi Zhang Department of Chemistry Fudan UniversityShanghai 200433China State Key Laboratory of Microbial Metabolism School of Life Sciences&BiotechnologyShanghai Jiao Tong UniversityShanghai 200240China

Demetallation of heme to release iron is a chemical difficult reaction and is highly rare in biochemistry,with apoferritin as the only known enzyme responsible for this process.Here we show the heme degradation enzyme Chuw catalyzes heme demetallation besides its known methyltransferase activity(which converts heme to a ring-open product anaerobilin).We show the demetallation activity of Chuw is radical SAM-dependent,and likely involves the same set of intermediates involved in the anaerobilin-producing pathway.The ChuW-catalyzed demetallation reaction does not require external reductant,and can occur on several heme analogs with different metal centers.These findings establish a brand-new chemistry in the radical SAM enzymes,highlighting the remarkable catalytic diversity of this superfamily of enzymes.

关键词： Biosynthesis Biotransformations Cofactors Enzymes Hemin