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Identification of the optimal doping position of hetero-atoms in chalcogen-doped Fe-N-C catalysts for oxygen reduction reaction

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Particuology 2024年第6期89卷 99-108页

作者： Weihao Liu Huanhuan He Qingtao Liu Xin wan Jianglan Shui School of Materials Science and Engineering Beihang UniversityBeijing100191China School of Space and Environment Beihang UniversityBeijing102206China Tianmushan Laboratory Hangzhou310023China

The excellent oxygen reduction reaction(ORR)activity of Fe–N–C catalysts in acidic media makes them potential for low-cost proton exchange membrane fuel *** recent years,it has been shown that heteroatoms(B,O,S,P,Cl,F,etc.)can be used as electron-withdrawing groups to modulate the planar structure and electron distribution of the Fe–Nx active sites to achieve simultaneous improvement of catalytic activity and ***,the optimal location of the heteroatoms remains ***,taking chalcogen heteroatoms(S and Se)as an example,we control the doping positions and investigate their effect on the ORR performance of the Fe–N–C *** first coordination shell of the iron single atom is identified as the optimal doping *** optimized catalysts Fe–N_(3)Se_(1)/NC and Fe–N_(3)Se_(1)/NC demonstrate improved activity and stability in both half cells and fuel *** work provides insights into the enhancement mechanism of heteroatom doping in single-atom catalysts.

关键词： Oxygen reduction reaction Fe-N-C catalysts Hetero-atom doping Doping position Enhancement mechanism

Transient Stability Preventive Control of Wind Farm Connected Power System Considering the Uncertainty

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Energy Engineering 2024年第6期121卷 1637-1656页

作者： Yuping Bian Xiu wan Xiaoyu Zhou School of Electric Power Engineering Nanjing Institute of TechnologyNanjing211167China

To address uncertainty as well as transient stability constraints simultaneously in the preventive control of windfarm systems, a novel three-stage optimization strategy is established in this paper. In the first stage, the probabilisticmulti-objective particle swarm optimization based on the point estimate method is employed to cope with thestochastic factors. The transient security region of the system is accurately ensured by the interior point methodin the second stage. Finally, the verification of the final optimal objectives and satisfied constraints are enforcedin the last stage. Furthermore, the proposed strategy is a general framework that can combine other optimizationalgorithms. The proposed methodology is tested on the modified WSCC 9-bus system and the New England 39-bussystem. The results verify the feasibility of the method.

关键词： Transient preventive control chance-constrained programming multi-objective PSO TSCOPF wind farm

Selective oxidation using in-situ generated hydrogen peroxide over titanosilicates

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Chinese Journal of Structural Chemistry 2024年第6期43卷 12-14页

作者： Zhipeng wan Hao Xu Peng Wu State Key Laboratory of Petroleum Molecular&Process Engineering Shanghai Key Laboratory of Green Chemistry and Chemical ProcessesSchool of Chemistry and Molecular Engineering East China Normal UniversityShanghai200062China Institute of Eco-Chongming Shanghai202162China

Titanosilicates are a class of heteroatom-containing zeolitic materials with tetrahedrally coordinated Ti^(4+)ions incorporated into crystalline zeolite frameworks,with TS-1,Ti-MWW and Ti-MOR as representative and attractive selective oxidation *** liquid-phase oxidations of a variety of substrates such as olefins and ketones with the green oxidant of H_(2)O_(2)over titanosilicates under mild conditions have attracted considerable research interests in the clean production of fine and bulk chemicals,among which propylene epoxidation and cyclohexanone ammoximation have been industrialized[1].

关键词： silicate zeolite propylene

wan-Yee Joseph Lau:the promoter of modernization and internationalization of Chinese surgery

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Oncology and Translational Medicine 2024年第1期10卷 1-3页

作者： wan-Yee Joseph Lau Faculty of Medicine The Chinese University of Hong KongHong KongChina

To my knowledge,there have been 3 books[1–3]and 2 book chapters written about me.[4–5]For those who are interested in the details of my life,please refer to these books/book *** title of this article is an English translation of the title of the book I refer to as reference 1,which I find appropriate to describe the role that I play in China.

关键词： please details translation

Copper Catalyzed Enantioconvergent Nucleophilic Substitutions

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Chinese Journal of Chemistry 2024年第10期42卷 1161-1174页

作者： Chunxi Huang Zilong wan Aoping Zhu Caiyou Chen College of Chemistry and Molecular Sciences Wuhan UniversityWuhanHubei 430072China Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and College of Chemistry and Chemical Engineering Hubei UniversityWuhanHubei 430062China

As a versatile earth-abundant transition metal,Cu has long been widely applied in the C—C and C—X bond forming *** for now,low-valent Cu(Ⅰ)is known to reduce the redox active electrophiles via an SET pathway to give the corresponding radical and Cu(Ⅱ)*** resulting Cu(Ⅱ)species can interact with the radical via the out-sphere pathway,affording the coupling ***,Cu(Ⅱ)can trap the radical through the inner-sphere process to generate Cu(Ⅲ)species and then realize challenging bond formations due to the facile reductive elimination of Cu(Ⅲ)*** copper catalysis has been widely applied in arylations of various nucleophiles,copper-catalyzed enantioconvergent nucleophilic substitutions of racemic alkyl electrophiles have been less explored,likely due to the difficulties in overcoming the reduction potential of alkyl electrophiles,elimination of side reactions,and enantiomeric *** order to overcome the high reduction potential of alkyl electrophiles,the photo-induced strategy has been developed under mild *** alternative strategy with new anionic tridentate ligands has also been reported in this *** review summarizes recent developments in copper-catalyzed enantioconvergent nucleophilic substitutions of alkyl electrophiles by various nucleophiles to realize C—N,C—C,C—B,C—P and C—O bond formations and their brief mechanistic studies.

关键词： Enantioconvergent Nucleophilic substitution Copper Radical reactions Photocatalysis Asymmetric catalysis

Rule acquisition of three-way semi-concept lattices in formal decision context

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CAAI Transactions on Intelligence Technology 2024年第2期9卷 333-347页

作者： Jie Zhao Renxia wan Duoqian Miao Boyang Zhang School of Mathematics and Information Science North Minzu UniversityYinchuanNingxiaChina Department of Computer Science and Technology Tongji UniversityShanghaiChina Department of Computer Science Bowling Green State UniversityBowling GreenOhioUSA

Three-way concept analysis is an important tool for information processing,and rule acquisition is one of the research hotspots of three-way concept ***,compared with three-way concept lattices,three-way semi-concept lattices have three-way operators with weaker constraints,which can generate more *** this article,the problem of rule acquisition for three-way semi-concept lattices is discussed in *** authors construct the finer relation of three-way semi-concept lattices,and propose a method of rule acquisition for three-way semi-concept *** authors also discuss the set of decision rules and the relationships of decision rules among object-induced three-way semi-concept lattices,object-induced three-way concept lattices,classical concept lattices and semi-concept ***,examples are provided to illustrate the validity of our conclusions.

关键词： finer relation rule acquisition three-way concept analysis three-way semi-concept lattices

Agricultural Investment Project Decisions Based on an Interactive Preference Disaggregation Model Considering Inconsistency

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Computer Modeling in Engineering & Sciences 2024年第6期139卷 3125-3146页

作者： Xingli Wu Huchang Liao Shuxian Sun Zhengjun wan Business School Sichuan UniversityChengdu610064China National Institute of Measurement and Testing Technology Chengdu610021China

Agricultural investment project selection is a complex multi-criteria decision-making problem,as agricultural projects are easily influenced by various risk factors,and the evaluation information provided by decisionmakers usually involves uncertainty and *** literature primarily employed direct preference elicitation methods to address such issues,necessitating a great cognitive effort on the part of decision-makers during evaluation,specifically,determining the weights of *** this study,we propose an indirect preference elicitation method,known as a preference disaggregation method,to learn decision-maker preference models fromdecision *** enhance evaluation ease,decision-makers merely need to compare pairs of alternatives with which they are familiar,also known as reference *** linguistic preference relations are employed to account for the presence of incomplete and uncertain information in such pairwise *** address the inconsistency among a group of decision-makers,we develop a pair of 0-1mixed integer programming models that consider both the semantics of linguistic terms and the belief degrees of ***,we conduct a case study and comparative *** reveal the effectiveness of the proposed model in solving agricultural investment project selection problems with uncertain and inconsistent decision information.

关键词： Multiple criteria analysis preference disaggregation inconsistency probability linguistic preference relation investment project selection

A Quarterly High RFM Mining Algorithm for Big Data Management

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Computers, Materials & Continua 2024年第9期80卷 4341-4360页

作者： Cuiwei Peng Jiahui Chen Shicheng wan Guotao Xu School of International Education Guangdong University of TechnologyGuangzhou510006China School of Computer Science and Technology Guangdong University of TechnologyGuangzhou510006China Business Administration South China University of TechnologyGuangzhou510641China Guangzhou Institute of Technology Xidian UniversityGuangzhou710071China

In today’s highly competitive retail industry,offline stores face increasing pressure on *** hope to improve their ability in shelf management with the help of big data *** this,on-shelf availability is an essential indicator of shelf data management and closely relates to customer purchase ***(recency,frequency,andmonetary)patternmining is a powerful tool to evaluate the value of customer ***,the existing RFM patternmining algorithms do not consider the quarterly nature of goods,resulting in unreasonable shelf availability and difficulty in *** solve this problem,we propose a quarterly RFM mining algorithmfor On-shelf products named *** algorithmmines the high recency,high frequency,and high monetary patterns and considers the period of the on-shelf goods in quarterly *** conducted experiments using two real datasets for numerical and graphical analysis to prove the algorithm’s *** with the state-of-the-art RFM mining algorithm,our algorithm can identify more patterns and performs well in terms of precision,recall,and F1-score,with the recall rate nearing 100%.Also,the novel algorithm operates with significantly shorter running times and more stable memory usage than existing mining ***,we analyze the sales trends of products in different quarters and seasonal *** analysis assists businesses in maintaining reasonable on-shelf availability and achieving greater profitability.

关键词： Data mining recency pattern high-utility itemset RFM pattern mining on-shelf management

BACNN: Multi-scale feature fusion-based bilinear attention convolutional neural network for wood NIR classification

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Journal of Forestry Research 2024年第4期35卷 202-214页

作者： Zihao wan Hong Yang Jipan Xu Hongbo Mu Dawei Qi College of Science Northeast Forestry UniversityHarbin 150040People’s Republic of China

Effective development and utilization of wood resources is *** modification research has become an integral dimension of wood science research,however,the similarities between modified wood and original wood render it challenging for accurate identification and classification using conventional image classification ***,the development of efficient and accurate wood classification techniques is *** paper presents a one-dimensional,convolutional neural network(i.e.,BACNN)that combines near-infrared spectroscopy and deep learning techniques to classify poplar,tung,and balsa woods,and PVA,nano-silica-sol and PVA-nano silica sol modified woods of *** results show that BACNN achieves an accuracy of 99.3%on the test set,higher than the 52.9%of the BP neural network and 98.7%of Support Vector Machine compared with traditional machine learning methods and deep learning based methods;it is also higher than the 97.6%of LeNet,98.7%of AlexNet and 99.1%of ***,the classification method proposed offers potential applications in wood classification,especially with homogeneous modified wood,and it also provides a basis for subsequent wood properties studies.

关键词： Wood classification Near infrared spectroscopy Bilinear network SE module Anti-noise algorithm