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High-performance Cu_(0.95)V_(2)O_(5) nanoflowers as cathode materials for aqueous zinc-ion batteries

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Rare Metals 2022年第1期41卷 29-36页

作者： Xin Yu Fang Hu zhi-qiang guo Lei Liu Gui-Hong Song Kai Zhu School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China Weifang City Planning&Design Institute Weifang 261000China Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education College of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150010China

Exploring high-performance cathode materials for aqueous zinc ion batteries(ZIBs)is still one of the critical *** vanadate compound has become a potential cathode material for ZIBs with a novel displacement reaction mechanism of reversible reduction/oxidation of Cu^(2+)/Cu^(0).Herein,we reported Cu_(0.95)V_(2)O_(5)nanoflowers prepared using a hydrothermal synthesis method as a capable cathode material for *** Cu_(0.95)V_(2)O_(5)nanoflowers exhibit high specific capacity of 405 mAh·g^(-1) at the current density of 100 mA·g^(-1),benefiting from the displacement reaction mechanism and phase transformation mechanism from Cu_(0.95)V_(2)O_(5)to the open and stable architecture Cu_(0.4)V_(2)O_(5)and Zn3(OH)2V2O7·2H2O *** cathode exhibits excellent rate performance with a high capacity of-200 mAh·g^(-1)at 5 A·g^(-1) and outstanding cycle stability with a capacity retention of 92%after 1000 *** is anticipated that the novel Cu_(0.95)V_(2)O_(5)nanoflowers are promising cathode material in the application for zinc ion batteries.

关键词： flowers performance cathode

合流制溢流污染控制系统效能评估方法研究及应用

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中国给水排水 2024年第15期40卷 123-130页

作者：张英马晶晶李璇吴雪何佳杨艳支国强邵智邓伟明周鸿斌白荣吴丽芳昆明市生态环境科学研究院云南昆明650032 昆明排水设施管理有限责任公司云南昆明650118 昆明理工大学环境科学与工程学院云南昆明650500 昆明滇池水务股份有限公司云南昆明650228

为提升合流制溢流污染控制系统的运行效能,持续改善水环境质量,结合黑臭水体治理、城镇污水处理提质增效等上位政策的要求,选择与溢流污染控制相关的排水设施以及溢流污染产生的环境影响等方面的相关指标,提出了溢流污染控制系统评估的... 详细信息

为提升合流制溢流污染控制系统的运行效能,持续改善水环境质量,结合黑臭水体治理、城镇污水处理提质增效等上位政策的要求,选择与溢流污染控制相关的排水设施以及溢流污染产生的环境影响等方面的相关指标,提出了溢流污染控制系统评估的指标体系,并建立了基于模糊综合评价法的效能评估方法;同时,以滇池流域北片排水分区作为案例区,进行了溢流污染控制系统的效能评估。从各指标的评价结果来看,案例区合流制溢流污染控制系统整体效能偏低,评估结果不容乐观,现状设施效能亟待提高。基于效能评估结果可识别片区溢流污染控制短板,明确片区的溢流污染控制重点,并为片区溢流污染控制体系的完善提供支撑。

关键词：合流制溢流污染效能评估指标体系模糊综合评价滇池流域

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Directional motion of dust particles at different gear structuresin a plasma

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Chinese Physics B 2020年第2期29卷 362-365页

作者： Chao-Xing Dai Chao Song zhi-Xiang Zhou Wen-Tao Sun zhi-qiang guo Fu-Cheng Liu Ya-Feng He Hebei Key Laboratory of Optic-electronic Information Materials College of Physics Science and TechnologyHebei UniversityBaoding 071002China

Directional motion of dust particles in a dusty plasma ratcnet is observed *** dusty plasma ratcnet consists of two concentric gears with asymmetric *** is found that the sawtooth number affects the directional motion of dust particles along the saw *** the inerease of the sawtooth number,the particle velocity increases firstly and then decreases,and there is an optimum number of the sawtooth which could induce fast rotation of dust *** velocities of dust particles change as they are flowing along the saw *** also explore the force acting on the dust particle experimentally.

关键词： dusty plasma ratchet

Characteristics of fault zones and their control on remaining oil distribution at the fault edge: a case study from the northern Xingshugang Anticline in the Daqing Oilfield, China

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Petroleum Science 2016年第3期13卷 418-433页

作者： Xiao-Fei Fu Xiao Lan Ling-Dong Meng Hai-Xue Wang Zong-Bao Liu zhi-qiang guo Zai-He Chen Laboratory of CNPC Fault Controlling Reservoir Northeast Petroleum University Science and Technology Innovation Team in Heilongjiang Province ‘‘Fault Deformation Sealing and Fluid Migration’’ The State Key Laboratory Base of Unconventional Oil and Gas Accumulation and Exploitation Earth Science CollegeNortheast Petroleum University Earth Science College Northeast Petroleum University NO.5 Production Plant Huabei Oilfield Co.PetroChina

Most major oil zones in the Daqing Oilfield have reached a later,high water cut stage,but oil recovery is still only approximately 35%,and 50%of reserves remain to be *** remaining oil is primarily distributed at the edge of faults,in poor sand bodies,and in insufficiently injected and produced ***,the edge of faults is a major target for remaining oil enrichment and potential *** on the dynamic change of production from development wells determined by the injection-recovery relationship at the edge of faults,we analyzed the control of structural features of faults on remaining oil enrichment at the *** results show that the macroscopic structural features and their geometric relationship with sand bodies controlled remaining oil enrichment zones like the edges of NNE-striking faults,the footwalls of antithetic faults,the hard linkage segments（two faults had linked together with each other to form a bigger through-going fault）,the tips of faults,and the oblique anticlines of soft *** edges formed two types of forward microamplitude structures：（1） the tilted uplift of footwalls controlled by inverse fault sections and（2） the hanging-wall horizontal anticlines controlled by synthetic fault *** remaining oil distribution was controlled by microamplitude ***,such zones as the tilted uplift of the footwall of the NNW-striking antithetic faults with a fault throw larger than 40 m,the hard linkage segments,the tips of faults,and the oblique anticlines of soft linkage were favorable for tapping the remaining oil ***-target directional drilling was used for remaining oil development at fault *** fault spacing was determined on the basis of fault combinations and width of the shattered *** core and log data revealed that the width of the shattered zone on the side of the fault core was less than 15 m in general;therefore,the distance from a fault to the development target

关键词： Fault edge Fault zone structure Segmentation growth Micro-amplitude structure Sealing Safety distance

Correlation between longitudinal crack occurrence and mold heat transfer in continuous casting based on process data mining

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Journal of Iron and Steel Research International 2024年第5期31卷 1139-1152页

作者： zhi-qiang Peng Zi-bing Hou Kai Yi Kun-hui guo Dong-wei guo Guang-hua Wen College of Materials Science and Engineering Chongqing UniversityChongqing400044China Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials Chongqing UniversityChongqing400044China

The correlation between the longitudinal crack occurrence and integrated heat transfer of the mold with data mining methods was ***,three kinds of support vector machine models based on principal component analysis with different input features were established to explore the effect of integrated heat transfer on the accuracy of the prediction model for the longitudinal *** results show that the accuracy was improved while features including mean and standard deviation of integrated heat transfer were ***,the difference in integrated heat transfer between defect and normal samples under the same process parameters was quantitatively *** with normal samples,the temperature difference of cooling water for defect samples decreased by 0.65%,and the temperature difference fluctuation increased by 31.1%.Finally,the literature data were used to provide support for the quantitative correlation according to defect formation mechanism.A new criterion for the prediction of longitudinal crack and a discovering method for correlation between product quality and process parameters in the manufacturing industry have been provided.

关键词： Continuous casting slab Longitudinal surface crack Heat transfer Data mining Quantitative correlation

TSC prediction and dynamic control of BOF steelmaking with state-of-the-art machine learning and deep learning methods

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Journal of Iron and Steel Research International 2024年第1期31卷 174-194页

作者： Tian-yi Xie Cai-dong Zhang Quan-lin Zhou zhi-qiang Tian Shuai Liu Han-jie guo Material Technology Research Institute Hesteel GroupShijiazhuang050023HebeiChina Tangsteel Company Hesteel GroupTangshan063611HebeiChina School of Artificial Intelligence Beijing Technology and Business UniversityBeijing100048China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China

Mathematical(data-driven)models based on state-of-the-art(SOTA)machine learning and deep learning models and data collected from 12,786 heats were established to predict the values of temperature,sample,and carbon(TSC)test,including temperature of molten steel(TSC-Temp),carbon content(TSC-C)and phosphorus content(TSC-P),which made prepa-ration for eliminating the TSC *** maximize the prediction accuracy of the proposed approach,various models with different inputs were implemented and compared,and the best models were applied to the production process of a Hesteel Group steelmaking plant in China in the *** number of tabular features(hot metal information,scrap,additives,blowing practices,and preset values)was expanded,and time series(off-gas profiles and blowing practice curves)that could reflect the entire steelmaking process were introduced as ***,the latest machine learning models(LightGBM,CatBoost,TabNet,and NODE)were used to make predictions with tabular features,and the best coefficient of determination R^(2)values obtained for TSC-P,TSC-C and TSC-Temp predictions were 0.435(LightGBM),0.857(Cat-Boost)and 0.678(LightGBM),respectively,which were higher than those of classic models(backpropagation and support vector machine).Then,making predictions was performed by using SOTA time series regression models(SCINet,DLinear,Informer,and MLSTM-FCN)with original time series,SOTA image regression models(NesT,CaiT,ResNeXt,and GoogLeNet)with resized time series,and the proposed Concatenate-Model and Parallel-Model with both tabular features and time *** optimization and comparisons,it was finally determined that the Concatenate-Model with MLSTM-FCN,SCINet and Informer as feature extractors performed the best,and its R^(2)values for predicting TSC-P,TSC-C and TSC-Temp reached 0.470,0.858 and 0.710,*** field test accuracies for TSC-P,TSC-C and TSC-Temp were 0.459,0.850 and 0.685,respectively.A related importance analysis was carri

关键词： BOF steelmaking In-blow prediction TSC test Machine learning Deep learning Field application

Spontaneous Infection and Periodic Evolving of Domain in a Diffusive SIS Epidemic Model

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Acta Mathematicae Applicatae Sinica 2024年第1期40卷 164-191页

作者： qiang Wen guo-qiang Ren Bin Liu School of Mathematics and Statistics Huazhong University of Science and TechnologyWuhan430074China Hubei Key Laboratory of Engineering Modeling and Scientific Computing Huazhong University of Science and TechnologyWuhan430074China

In this paper, we consider a susceptible-infective-susceptible(SIS) reaction-diffusion epidemic model with spontaneous infection and logistic source in a periodically evolving domain. Using the iterative technique,the uniform boundedness of solution is established. In addition, the spatial-temporal risk index R0(ρ) depending on the domain evolution rate ρ(t) as well as its analytical properties are discussed. The monotonicity of R0(ρ)with respect to the diffusion coefficients of the infected dI, the spontaneous infection rate η(ρ(t)y) and interval length L is investigated under appropriate conditions. Further, the existence and asymptotic behavior of periodic endemic equilibria are explored by upper and lower solution method. Finally, some numerical simulations are presented to illustrate our analytical results. Our results provide valuable information for disease control and prevention.

关键词： diffusive SIS model spontaneous infection periodically evolving domain periodic endemic equilibrium

Recent Advances in Pd-Catalyzed Reactions Involving the “On-Water” Mechanism

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Chinese Journal of Chemistry 2024年第5期42卷 533-542页

作者： Dong Wei guo-qiang Lin State Key Laboratory of Systems Medicine for Cancer Shanghai Cancer InstituteShanghai Key Laboratory of Systems Regulation and Clinical Translation for CancerRen Ji HospitalShanghai Jiao Tong University School of MedicineShanghai200127 China State Key Laboratory of Chemical Biology Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai200032 China

As the chemical industry grapples with the need for more eco-friendly practices,the use of water as a reaction medium is gaining attraction in organic *** mini-review delves into Pd-catalyzed reactions that utilize the "on-water" mechanism,spanning from 2019 to late *** reactions are neatly categorized into several types: (A) Catalytic C—H activations,(B) Mizoroki- Heck-type reactions,(C) Suzuki-Miyaura reactions,and (D) Cyclization *** showcasing the potential of water as a sustainable reaction medium for organic transformations,these reactions leave no doubt about the importance of embracing eco-friendly practices in the chemical *** Scientists In 1980,a seminal work by Breslow et *** an acceleration of reaction rate in the Diels-Alder *** and co-workers noted a significant increase in the rate of the [2σ+2σ+2π] cycloaddition of quadricyclane and dimethyl azodicarboxylate (DMAD) when the reaction was conducted in water,as opposed to when it was carried out in organic *** term "on-water" was then coined to describe this *** strategy was further expanded to transition-metal catalyzed transformations by Ackermann in ***,Varma and Leazer disclosed a Pd-catalyzed Mizoroki-Heck type arylation of alkenes with diaryliodonium salts “on-water”.The enantioselective version of "on-water" process was not realized until 2014 by the Zhou *** on,the Schaub group described a Pd-catalyzed Suzuki–Miyaura coupling reaction of electron-poor aryl chlorides with water,using only 50 ppm of catalyst *** recently,Liu and Lin extended the "on-water" strategy to Pd-catalyzed double Mizoroki-Heck *** mini-review has focused on Pd-catalyzed reactions involving the “on-water” mechanism.

关键词： Pd-catalyzed “On-water” Green chemistry Aqueous reactions Mechanism Methodology and reactions Mizoroki-Heck reaction Cross-coupling

New insights into the deposition of natural gas hydrate on pipeline surfaces:A molecular dynamics simulation study

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Petroleum Science 2024年第1期21卷 694-704页

作者： Jun Zhang Hai-qiang Fu Mu-zhi guo Zhao Wang Li-Wen Li Qi Yin You-guo Yan Wei Wei Wei-Feng Han Jie Zhong School of Materials Science and Engineering China University of Petroleum(East China)Qingdao 266580ShandongChina School of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580ShandongChina Department of Alternative Energy PetroChina Research Institute of Petroleum Exploration&DevelopmentLangfang 065007HebeiChina

Natural gas hydrate(NGH)can cause pipeline blockages during the transportation of oil and gas under high pressures and low *** hydrate adhesion on pipelines is viewed as an efficient way to prevent NGH *** studies suggested the water film can greatly increase hydrate adhesion in gas-dominant ***,by performing the molecular dynamics simulations,we find in water-dominant system,the water film plays different roles in hydrate deposition on Fe and its corrosion ***,due to the strong affinity of water on Fe surface,the deposited hydrate cannot convert the adsorbed water into hydrate,thus,a water film *** water affinities decrease(Fe>Fe_(2)O_(3)>FeO>Fe_(3)O_(4)),adsorbed water would convert to amorphous hydrate on Fe_(2)O_(3)and form the ordered hydrate on FeO and Fe_(3)O_(4)after hydrate *** absorbed water film converts to amorphous or to hydrate,the adhesion strength of hydrate continuously increases(Fe

关键词： Deposition Natural gas hydrate Pipelines Water affinity Adhesion strength