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Single transition-metal atoms anchored on a novel Diracdispersiveπ-πconjugated holey graphitic carbon nitride substrate:computational screening toward efficient bifunctional OER/ORR electrocatalysts

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Rare Metals 2024年第8期43卷 3819-3832页

作者： Chun-Yao Fang Xi-Hang Zhang Qiang Zhang Di Liu Xiao-meng cui Jing-Cheng Xu Cheng-Long Shi meng-Yu Yang College of Science University of Shanghai for Science and TechnologyShanghai 200093China School of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China

Nonprecious-metal-group single-metal-atom catalysts with bifunctional catalytic capabilities toward the oxygen evolution reaction(OER)and oxygen reduction reaction(ORR)are highly sought after in energy-conversion and storage ***,producing renewable and sustainable energy sources remains ***,single-transition metal atoms anchored onπ-πconjugated two-dimensional(2D)graphitic carbon nitride substrates formπ-d conjugated conductive channels that enhance the overall electrocatalytic ***,firstprinciples calculations were carried out to design and demonstrate a novel macropore graphitic carbon nitride(gC_(10)N_(3))as a promising 2D electrocatalyst substrate to support single-transition metal(TM,from Sc to Au).The"donation-acceptance"charge interaction in the TM-N_(2)moiety effectively balances the adsorption strength of oxygenated intermediates in Ni@g-C_(10)N_(3)and Rh@gC_(10)N_3,making them effective bifunctional OER/ORR electrocatalysts with IrO_(2)/Pt-beyond overpotentials being as low as 0.39/0.38 V and 0.54/0.44 V,***,they possess high stability and conductivity and are less susceptible to oxidation and corrosion under working *** guarantees high activity under ambient ***,the origin of the OER/ORR activity of TM@g-C_(10)N_(3) is explained using multilevel descriptors:intrinsic(p,Bader charge,integral crystal orbital Hamilton population(ICOHP),bond length,and d-band center(εd).In particular,for optimal Ni@g-C_(10)N_(3),the clear hybridization between the Ni-d orbital and surface O-p orbital causes the paired electrons to occupy the bonding *** enables OH~*to be adsorbed on the Ni@g-C_(10)N_(3),thereby achieving the highest catalytic performance.

关键词： First-principles calculation Oxygen evolution reaction Oxygen reduction reaction Bifunctional electrocatalysts Single-metal-atom electrocatalysts

Solutions of the(2+1)-dimensional Harry Dym Equation via Darboux Transformation Revisited

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Acta Mathematicae Applicatae Sinica 2024年

作者： meng-yuan cui Min XUE meng-xia ZHANG Department of Mathematics China University of Mining and TechnologyBeijing School of Mathematical Sciences Capital Normal University

The link of (2+1)-dimensional Harry Dym equation with the modified Kadomtsev-Petviashvili equation by the reciprocal transformation is shown. With the help of Darboux transformation, exact solutions of the (2+1)-dimen...

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Alteration of ascending colon mucosal microbiota in patients after cholecystectomy

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World Journal of Gastrointestinal Surgery 2024年第8期16卷 2436-2450页

作者： Miao-Yan Fan Qiao-Li Jiang meng-Yan cui meng-Qi Zhao Jing-Jing Wang Ying-Ying Lu Department of Gastroenterology Jiading Branch of Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 201803China Shanghai Key Laboratory of Pancreatic Diseases Institute of Translational MedicineShanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 201620China Department of Gastroenterology Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 201620China

BACKGROUND Cholecystectomy is a successful treatment option for gallstones,although the inci-dence of colorectal cancer(CRC)has notably increased in post-cholecystectomy(PC)***,it remains uncertain whether the altered mucosal micro-biota in the ascending colon is *** total,30 PC patients and 28 healthy controls underwent colonoscopies to collect mucosal biopsy *** patients were divided based on their clinical ***,16S-rRNA gene sequencing was used to analyze the amplicon,alpha diversity,beta diversity,and composition of the bacterial ***-tionally,the Phylogenetic Investigation of Communities by Reconstruction of Unobserved States(PICRUSt)database,sourced from the Kyoto Encyclopedia of Genes and Genomes,was used to predict the functional capabilities of the *** PC patients were comparable with healthy ***,PC patients older than 60 years had a distinct composition compared to those under 60 years *** richness was considerably higher at the phylum level in PC ***,Parabacteroides,and Bilophila were more abundant in the PC group than in the control ***,PC patients exhibited greater enrichment in metabolic pathways,specifically those related to lipopolysaccharide biosynthesis and vancomycin group antibiotic production,than *** This study indicated that the mucosal microbiota in PC patients was altered,perhaps offering new perspectives on the treatment possibilities for CRC and diarrhea following cholecystectomy.

关键词： Post-cholecystectomy Ascending colon Mucosal Microbiota Colorectal cancer Diarrhea

Inhibiting shuttle effect of lithium polysulfides by double metal selenides for high-performance lithium-sulfur batteries

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Rare Metals 2024年第6期43卷 2546-2559页

作者： Lei Li Xue-Jing Yang Yi-Yang Li Bo Jin Hui Liu meng-Yang cui Dong-Bo Guan Xing-You Lang Qing Jiang Key Laboratory of Automobile Materials Ministry of Educationand College of Materials Science and EngineeringJilin UniversityChangchun 130022China

Lithium-sulfur batteries(LSBs)have attracted the attention of more and more researchers due to the advantages of high energy density,environmental friendliness,and low production ***,the low electronic conductivity of active material and shuttling effect of lithium polysulfides(LiPSs)limit the commercial development of *** solve these problems,we design a core-shell composite with nitrogen-doped carbon(NC)and two types of selenides(FeSe_(2)-NC@ZnSe-NC).The FeSe_(2)-NC@ZnSe-NC has a strong adsorption capacity,and can effectively adsorb *** the same time,it also effectively alleviates the shuttling effect of LiPSs,and improves the utilization of the active substance during the charge/discharge reaction *** mechanism involved in FeSe_(2)-NC@ZnSe-NC is demonstrated by both experiments and density-functional theory(DFT)*** electrochemical test results indicate that LSB with S/FeSe_(2)-NC@ZnSe-NC delivers an initial discharge capacity of 1260 mAh·g^(-1)at *** after 500 cycles at 1C,the capacity decay rate per cycle is 0.031%,and the capacity retention rate is 85%.The FeSe_(2)-NC@ZnSe-NC core-shell structure verifies a rational strategy to construct an electrode material for high-performance LSBs.

关键词： Lithium-sulfur batteries Shuttling effect Metal selenide Nitrogen-doped carbon Lithium polysulfides

A hybrid machine learning optimization algorithm for multivariable pore pressure prediction

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Petroleum Science 2024年第1期21卷 535-550页

作者： Song Deng Hao-Yu Pan Hai-Ge Wang Shou-Kun Xu Xiao-Peng Yan Chao-Wei Li Ming-Guo Peng Hao-Ping Peng Lin Shi meng cui Fei Zhao School of Petroleum and Natural Gas Engineering Changzhou UniversityChangzhou213164JiangsuChina Tubular Goods Research Institute of CNPC Beijing102249China CNPC Engineering Technology R&D Company Limited Beijing102206China

Pore pressure is essential data in drilling design,and its accurate prediction is necessary to ensure drilling safety and improve drilling *** methods for predicting pore pressure are limited when forming particular structures and *** this paper,a machine learning algorithm and effective stress theorem are used to establish the transformation model between rock physical parameters and pore *** study collects data from three *** 1 had 881 data sets for model training,and Wells 2 and 3 had 538 and 464 data sets for model *** this paper,support vector machine(SVM),random forest(RF),extreme gradient boosting(XGB),and multilayer perceptron(MLP)are selected as the machine learning algorithms for pore pressure *** addition,this paper uses the grey wolf optimization(GWO)algorithm,particle swarm optimization(PSO)algorithm,sparrow search algorithm(SSA),and bat algorithm(BA)to establish a hybrid machine learning optimization algorithm,and proposes an improved grey wolf optimization(IGWO)*** IGWO-MLP model obtained the minimum root mean square error(RMSE)by using the 5-fold cross-validation method for the training *** the pore pressure data in Well 2 and Well 3,the coefficients of determination(R^(2))of SVM,RF,XGB,and MLP are 0.9930 and 0.9446,0.9943 and 0.9472,0.9945 and 0.9488,0.9949 and *** achieves optimal performance on both training and test data,and the MLP model shows a high degree of *** indicates that the IGWO-MLP is an excellent predictor of pore pressure and can be used to predict pore pressure.

关键词： Pore pressure Grey wolf optimization Multilayer perceptron Effective stress Machine learning

监督能动性作用下的行政复议制度改革探究——以行政复议意见书为视角

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行政法学研究 2024年第1期 74-83页

作者：崔梦豪华东政法大学中国法治战略研究院上海200042

行政复议作为化解行政争议主渠道目标的实现需要强化行政复议的能动性,行政复议意见书是充分发挥行政复议监督能动性的一项具体制度设计。行政复议意见书在实质性化解行政争议的大背景下回应了行政复议监督功能的制度需求,有利于促进行... 详细信息

行政复议作为化解行政争议主渠道目标的实现需要强化行政复议的能动性,行政复议意见书是充分发挥行政复议监督能动性的一项具体制度设计。行政复议意见书在实质性化解行政争议的大背景下回应了行政复议监督功能的制度需求,有利于促进行政复议多元功能同步发挥。行政复议意见书的理论基础是行政复议权的行政性和行政复议制度的职权主义。行政复议意见书的目的与功能是强化行政复议的监督功能,强化行政复议实质性化解行政争议的能力和助推行政复议主渠道目标的实现。鉴于之前行政复议意见书在规范层面精细化程度不够和行政复议制度本身的各种原因,行政复议意见在实践中不断地扩张适用领域,背离了该项制度设置的初衷。新修订的《行政复议法》对行政复议意见书进行了重新的建构,行政复议意见书在实施过程中还需要进一步细化相关构成要件,同时完善行政复议意见书的执行措施和监督措施。

关键词：行政复议主渠道监督能动性行政复议意见书

退化草甸植物根系生产力对不同恢复措施的响应

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Journal of Plant Ecology 2024年第3期17卷 141-152页

作者： meng cui Hong-Hui Wu Chang-Qing Jing Tao Zhang Shi-Ying Zhao Ying-Zhi Gao Key Laboratory of Grassland Resources and Ecology of Xinjiang Uygur Autonomous Region College of Grassland ScienceXinjiang Agricultural UniversityUrumqi 830052China State Key Laboratory of Vegetation and Environmental Change Institute of Botanythe Chinese Academy of SciencesBeijing 100093China State Key Laboratory of Effcient Utilization of Arid and Semi-arid Arable Land in Northern China Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China Key Laboratory of Arable Land Quality Monitoring and Evaluation Ministry of Agriculture and Rural AffairsInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China Key Laboratory of Vegetation Ecology of the Ministry of Education Jilin Songnen Grassland Ecosystem National Observation and Research StationNortheast Normal UniversityChangchun 130024China Songyuan Agriculture and Rural Bureau Songyuan 138000China

根系生产力及其动态变化对评价退化草地的恢复起着重要作用。然而,目前尚不清楚根系如何响应不同恢复措施。为了探究根系对不同恢复措施的响应,本研究于2013–2014年在退化草甸开展了田间试验。试验处理包括:自由放牧(FG)、不翻耕(NP)... 详细信息

根系生产力及其动态变化对评价退化草地的恢复起着重要作用。然而,目前尚不清楚根系如何响应不同恢复措施。为了探究根系对不同恢复措施的响应,本研究于2013–2014年在退化草甸开展了田间试验。试验处理包括:自由放牧(FG)、不翻耕(NP)、仅翻耕(OP)、翻耕+施肥(PF)、翻耕+覆盖(PM)和翻耕+施肥+覆盖(PFM)。研究结果表明,根系的季节动态为单峰模式,主要受降水的影响,但不受恢复措施的影响。不同恢复措施对根系生产力的影响取决于降水量。在2013年,与FG相比,PFM通过增加ANPP、土壤含水量和根系数量显著提高根系生产力达242.34%(0–10 cm)和90.8%(10–20 cm);2014年不同恢复措施对根系生产力的影响不显著。根系周转在不同恢复措施间无显著变化,其范围为0.47–0.78 yr−1。这主要是由于在不同样地中优势物种均是一年生物种虎尾草(Chloris virgata),其根系周转变化相对较小。此外,PFM还通过改善土壤条件提高了根系寿命和存活率。上述结果表明,组合恢复措施是促进松嫩草甸地下根系恢复的有效途径。

关键词：恢复措施退化草甸根系生产力根系周转根系寿命

构建海洋生态分类分区体系,推动基于生态系统的海洋管理

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中国科学院院刊 2024年第5期39卷 872-880页

作者：路文海李潇崔猛国家海洋信息中心天津300171

基于生态系统的海洋管理是海洋生态文明建设的重要手段。我国当前的海洋生态分类分区工作通过全面梳理海洋生态系统类型和自然地理特征,将我国近海按照不同尺度划分为若干等级的生态空间单元,有效刻画了海洋生物群落及其栖息地的地理分... 详细信息

基于生态系统的海洋管理是海洋生态文明建设的重要手段。我国当前的海洋生态分类分区工作通过全面梳理海洋生态系统类型和自然地理特征,将我国近海按照不同尺度划分为若干等级的生态空间单元,有效刻画了海洋生物群落及其栖息地的地理分布特征,对于支撑基于生态系统的海洋管理具有重要作用。文章分析了海洋生态分类分区的现实意义,回顾了国内外海洋生态分类分区研究和发展历程,介绍了我国海洋生态分类分区的实践经验和应用前景,并对基于生态系统的海洋管理实现路径提出建议。

关键词：海洋管理生态分类生态分区生态系统

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考虑环境责任成本的双渠道绿色供应链定价与协调策略

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数学的实践与认识 2024年第8期54卷 11-37页

作者：梁喜孟翠重庆交通大学经济与管理学院重庆400074 兰州现代职业学院财经商贸学院甘肃兰州730300

构建了传统零售渠道、直销双渠道和分销双渠道三种渠道结构,利用以制造商为主导的Stackelberg博弈模型,分析了渠道偏好、产品绿色水平和环境责任成本对不同渠道结构定价决策的影响.研究发现,在一定范围内,随着消费者渠道偏好增加制造商... 详细信息

构建了传统零售渠道、直销双渠道和分销双渠道三种渠道结构,利用以制造商为主导的Stackelberg博弈模型,分析了渠道偏好、产品绿色水平和环境责任成本对不同渠道结构定价决策的影响.研究发现,在一定范围内,随着消费者渠道偏好增加制造商会倾向于开拓网上渠道;当生产较高绿色水平产品时制造商不应开通网上渠道;当环境责任水平或产品绿色水平降低时,制造商倾向于开通直销渠道,反之,应开通分销渠道.开通网上渠道会损害传统零售商利益,因此本文建立了利润分享机制,协调各成员的利润.

关键词：双渠道供应链绿色供应链定价环境责任渠道偏好