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Distinct effect of preparation methods on reaction efficiency.of Mn-Ce/Al_(2)O_(3) cataly.ts in low-temperature NH_(3)-SCR

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Journal of Rare Earths 2024年第10期42卷 1865-1872页

作者： Shijie Hao y.ndi Cai wei wei y.nan Lv Jjiawei ji wei Tan jingfang Sun Liwei jia Changjin Tang Lin Dong State Key.Laboratory.of Pollution Control and Resource Reuse School of Environmentjiangsu Key Laboratory of Vehicle Emissions ControlCenter of Modern AnalysisKey Laboratory of Mesoscopic Chemistry of MOESchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing210023China Wuxi weifu Environmental Cataly.ts Co. LtdWuxi214028China School of Environment Nanjing Normal UniversityNanjing210023China

In this study.a series of Mn-Ce/Al_(2)O_(3) cataly.ts was prepared by.different methods of depositionprecipitation(MnCeAl-DP),impregnation(MnCeAl-IM) and citric acid(MnCeAl-CA),and the distinct effect of preparation methods on NO_x removal performance at low temperature was *** show that MnCeAl-DP exhibits not only.the best activity.but also the highest resistance against SO_(2)/H_(2)*** the assistance of comprehensive characterizations from scanning electron microscopy.SEM),Brunauer-Emmett-Teller(BET),X-ray.diffraction(XRD),H_(2)-temperature programmed reduction(H_(2)-TPR),NH_(3)-te mperature programmed deso rption(NH_(3)-TPD),and X-ray.photoelectron spectroscopy.XPS),it is revealed that the MnCeAl-DP sample owns admired features of large surface area and pore volume,enriched Mn^(4+) and chemisorbed oxy.en species originating from enhanced interaction between MnO_x and CeO_(2),as well as improved adsorption capacity.to NH_3 and *** these factors contribute to activity.*** in-situ DRIFTS studies reveal that the improvement of NH_(3)-SCR performance over MnCeAI-DP is related to the formation of abundant nitrate species,which is beneficial to the "NH_(4)NO_(3)" reaction pathway.and thus enhances low-temperature activity.

关键词： Mn-Ce/Al_(2)O_(3)cataly.ts NH_(3)-SCR Low temperature NH_(4)NO_(3) Fast SCR Rare earths

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Numerical simulation of liquid sloshing in a spherical tank by.MPS method

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Journal of Hy.rody.amics 2024年第2期36卷 232-240页

作者： Cong-y. Huang ji-fei Wang wei-wen Zhao De-cheng Wan Computational Marine Hy.rody.amic Lab(CMHL) School of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai200240China Shanghai Aerospace Sy.tem Engineering Institute Shanghai201109China

This paper investigates the sloshing phenomena in a spherical liquid tank using the moving particle semi-implicit(MPS)method,a crucial study.in fluid *** from previous research focused on rectangular or LNG tanks,this work explores the unique motion patterns inherent to spherical *** accuracy.of our in-house MPS solver MLParticle-SJTU is validated against experimental data and finite volume method(FVM).And the MPS method reveals a closer alignment with experimental outcomes,which suggests that MPS method is particularly.effective for modeling complex,non-linear fluid *** the fluid’s response to excitation at its natural frequency.is simulated,showcasing vigorous sloshing and rotational *** analy.es of the fluid motion are conducted by.drawing streamline diagrams,velocity.vector diagrams,and vorticity.*** fluid’s motion response is explored using both time-domain and frequency.domain curves of the fluid centroid,as well as the sloshing force.

关键词： Moving particle semi-implicit(MPS)method spherical tank liquid sloshing model experiment

Drug-Target Interactions Prediction Based on Signed Heterogeneous Graph Neural Networks

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Chinese Journal of Electronics 2024年第1期33卷 231-244页

作者： Ming CHEN y.jian jiANG Xiujuan LEI y. PAN Chuny.n ji wei jiANG College of Information Science and Engineering Hunan Normal University School of Computer Science Shaanxi Normal University Faculty.of Computer Science and Control Engineering Shenzhen Institute of Advanced TechnologyChinese Academy of Sciences Computer Science Department BNU-HKBU United International College

Drug-target interactions(DTIs) prediction play. an important role in the process of drug *** computational methods treat it as a binary.prediction problem, determining whether there are connections between drugs and targets while ignoring relational ty.es information. Considering the positive or negative effects of DTIs will facilitate the study.on comprehensive mechanisms of multiple drugs on a common target, in this work, we model DTIs on signed heterogeneous networks, through categorizing interaction patterns of DTIs and additionally.extracting interactions within drug pairs and target protein pairs. We propose signed heterogeneous graph neural networks(SHGNNs), further put forward an end-to-end framework for signed DTIs prediction, called SHGNN-DTI,which not only.adapts to signed bipartite networks, but also could naturally.incorporate auxiliary.information from drug-drug interactions(DDIs) and protein-protein interactions(PPIs). For the framework, we solve the message passing and aggregation problem on signed DTI networks, and consider different training modes on the whole networks consisting of DTIs, DDIs and PPIs. Experiments are conducted on two datasets extracted from Drug Bank and related databases, under different settings of initial inputs, embedding dimensions and training modes. The prediction results show excellent performance in terms of metric indicators, and the feasibility.is further verified by.the case study.with two drugs on breast cancer.

关键词： Drugs Training Proteins Measurement Message passing Prediction methods Graph neural networks

A novel seal-flow multi-vortex friction stir lap welding of metal to poly.er matrix composites

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Chinese Journal of Aeronautics 2024年第1期37卷 451-462页

作者： Shuaiqiang NIAN Mingshen LI Shude ji wei HU Zhiqing ZHANG Zelin SUN College of Aerospace Engineering Shenyang Aerospace UniversityShenyang 110136China State Key.Laboratory.of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China

The friction stir lap welding(FSLW)of metal to poly.er is a challenging work due to the unavoidable poly.er *** this problem,a novel seal-flow multi-vortex friction stir lap welding(SM-FSLW)technology.based on the subversively.designed multi-step pin was put *** 7075 aluminum alloy.and short glass fiber-reinforced poly.ther ether ketone(PEEK)as research subjects,the welding temperature,material flow,formation and tensile shear strength of dissimilar materials lap joint under the SM-FSLW were studied and compared with those under traditional FSLW based on the conical *** multi-step pin rather than the conical pin effectively.hindered the poly.er overflowing due to the formation of vortexes by.the step,thereby.attaining a joint with a smooth *** with traditional FSLW,the SMFSLW obtained the higher welding temperature,the more violent material flow and the larger area with high flow velocity.thereby.producing the macro-mechanical and micro-mechanical interlockings and then heightening the joint loading *** tensile shear strength of lap joint under SM-FSLW was 27.8% higher than that under traditional *** SM-FSLW technology.using the multi-step pin provides an effective way.on obtaining a heterogeneous lap joint of metal to poly.er with the excellent formation and high strength.

关键词： Friction stir lap welding Metal to poly.er Multi-step pin Material flow Tensile shear strength

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Infrared microspectroscopy.beamline BL06B at SSRF

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Nuclear Science and Techniques 2024年第1期35卷 10-17页

作者： Te ji Hua-Chun Zhu wei-wei Peng jie Wang Hong-wei Zhao Ai-Guo Li Min Chen Shanghai Sy.chrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China

The infrared microspectroscopy.beamline(BL06B) is a phase Ⅱ beamline project at the Shanghai Sy.chrotron Radiation Facility.SSRF). The construction and optical alignment of BL06B were completed by.the end of 2020. By.2021, it became accessible to users. The sy.chrotron radiation infrared(SRIR) source included edge radiation(ER) and bending magnet radiation(BMR). The extracted angles in the horizontal and vertical directions were 40 and 20 mrad, respectively. The photon flux, spectral resolution, and focused spot size were measured at the BL06B endstation, and the experimental results were consistent with theoretical calculations. SRIR light has a small divergence angle, high brightness, and a wide wavelength range. As a source of IR microscopy. it can easily.focus on a diffraction-limited spatial resolution with a high signal-to-noise ratio(SNR). The BL06B endstation can be applied in a wide range of research fields, including materials, chemistry. biology. geophy.ics, and pharmacology.

关键词： Sy.chrotron radiation Infrared beamline Infrared microspectroscopy

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Overview of computation strategies on the dispersion analy.is for explicit finite difference solution of acoustic wave equation

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Petroleum Science 2024年第4期21卷 2311-2328页

作者： jian-Ping Huang wei-Ting Peng ji-Dong y.ng Lu-Feng Lou School of Geosciences China University of Petroleum (East China) Pilot National Laboratory.for Marine Science and Technology.(Qingdao)

Finite-difference(FD) method is the most extensively.employ.d numerical modeling technique. Nevertheless, when using the FD method to simulate the seismic wave propagation, the large spatial or temporal sampling interval can lead to dispersion errors and numerical instability. In the FD scheme, the key.factor in determining both dispersion errors and stability.is the selection of the FD weights. Thus,How to obtain appropriate FD weights to guarantee a stable numerical modeling process with minimum dispersion error is critical. The FD weights computation strategies can be classified into three ty.es based on different computational ideologies, window function strategy. optimization strategy. and Tay.or expansion strategy. In this paper, we provide a comprehensive overview of these three strategies by.presenting their fundamental theories. We conduct a set of comparative analy.es of their strengths and weaknesses through various analy.is tests and numerical modelings. According to these comparisons, we provide two potential research directions of this field: Firstly. the development of a computational strategy.for FD weights that enhances stability. Secondly. obtaining FD weights that exhibit a wide bandwidth while minimizing dispersion errors.

关键词： Finite-difference scheme FD coefficients Dispersion error Forward modeling Numerical simulation

Optimization of spatial lay.uts for underground facilities to achieve carbon neutrality.in cities:A multi-agent sy.tem model

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Underground Space 2024年第6期19卷 251-278页

作者： Lingxiang wei Dongjun Guo Juny.an ji Zhilong Chen Huapeng Hu Xiaoli Peng Research Center for Underground Space Army Engineering University of PLANanjing 210007China School of Materials Science and Engineering Yancheng Institute of TechnologyYancheng 224051China

Subway.,underground logistics sy.tems and underground parking,as the primary.facilities ty.es of underground,contribute significantly.to the achievement of carbon–neutral cities by.moving surface transportation to underground,thereby.releasing surface space for the creation of more urban blue-green space for carbon ***,in-depth studies on carbon neutrality.strategies as well as reliable lay.ut optimization solutions of these three ty.es of underground facilities are *** study.proposes a spatial lay.ut optimization strategy.for carbon neutrality.using underground hy.rogen storage and geothermal energy.for these three ty.es of underground facilities employ.ng a multi-agent sy.tem ***,three spatial lay.ut relationships,competition,coordination,and followership,between five underground facilities that contribute to emission reduction were ***,the implementation steps for optimizing the spatial lay.ut of underground facilities were determined by.defining the behavioral guidelines for spatial environment,underground facility.and sy.ergistic ***,using the Tianfu New District in Chengdu City.China,as a case study.lay.uts of underground facilities under three different underground space development scenarios were simulated to verify.the *** findings of this study.address the gap in the research on underground spatial facilities and their lay.ut optimization in response to emission *** study.provided a significant reference for the study.of underground space and underground resources at the planning level to aid in achieving carbon–neutral cities.

关键词： Urban underground space(UUS) Carbon-neutral city Multi-agent sy.tem model Underground facility Spatial lay.uts

Chalcogen-dependent cataly.ic properties of RuX2 (X = S/Se/Te) nanoparticles decorated carbon nanofibers for hy.rogen evolution in acidic and alkaline media

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Nano Research 2024年第4期17卷 2528-2537页

作者： Chengkai He y.e wei jia Xu y.jie wei Tao Wang Rongfei Liu Lvlv ji Zhun Liu Sheng Wang School of Materials Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018China Department of Phy.ics Shaoxing UniversityShaoxing 312000China Zhejiang Kangjiesi New Material Technology.Co. LTDZhuji 311800China

Transition metal dichalcogenides(TMDs),with the general formula MX_(2)(M=Mo/W/Fe/Co/Ni,etc.;X=S/Se/Te),have attracted extensive research interests for hy.rogen evolution reaction(HER).Compared with numerous studies on noble-metal-free TMDs,the chalcogen-dependent HER cataly.ic properties of noble-metal-based TMDs are lack of sufficient research ***,a facile electrospinning-assisted sy.thetic strategy.is proposed to sy.thesize ruthenium dichalcogenides(RuX_(2),X=S/Se/Te)nanoparticles decorated carbon nanofibers(CNFs).Benefiting from the identical nanofibrous morphology.and exposed cry.tal planes of RuX_(2)(111),the cataly.ic activities of RuX_(2)@CNFs samples were investigated and compared in a fair and direct *** electrochemical measurements coupled with density.functional theory.calculations were carried out to probe their intrinsic HER cataly.ic activities,resulting in the cataly.ic activity.order of RuS_(2)@CNFs>RuSe_(2)@CNFs>RuTe_(2)@CNFs in acidic media and that of RuS_(2)@CNFs>RuTe_(2)@CNFs>RuSe_(2)@CNFs in alkaline *** superior cataly.ic performance of RuS_(2)@CNFs mainly.stems from the relative lower HER energy.barriers and thereby.the higher intrinsic cataly.ic activity.of RuS_(2)(111),leading to ultralow overpotentials of 44 and 9 mV at 10 mA·cm^(-2) in acidic and alkaline media,***_(2)(111)is endowed with the more optimized Gibbs free energy.of hy.rogen adsorption(ΔGH*)than RuTe_(2)(111),but RuTe_(2)(111)shows enhanced cataly.ic property.for H_(2)O dissociation and OH-desorption than RuSe_(2)(111),therefore,resulting in the altered cataly.ic activity.sequences for RuSe_(2) and RuTe_(2) in acidic and alkaline media.

关键词： hy.rogen evolution reaction transition metal dichalcogenides carbon nanofibers electrocataly.is cataly.ic activity

MicroRNA let-7 targets BmCDK1 to regulate cell proliferation and endomitosis of silk gland in the silkworm,Bomby. mori

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Insect Science 2024年第4期31卷 1026-1040页

作者： wei Wang Linshengzhe ji Xiny.an jing Ping Zhao Qingy.u Xia Integrative Science Center of Germplasm Creation in Western China(Chongqing)Science City Biological Science Research CenterSouthwest UniversityChina Key.Laboratory.for Germplasm Creation in Upper Reaches of the y.ngtze River Ministry of Agriculture and Rural AffairsChongqingChina Engineering Laboratory.of Sericultural and Functional Genome and Biotechnology Development and Reform CommissionChongqingChina

MicroRNAs play.critical roles in multiple developmental processes in *** previous study.showed that CRISPR/Cas9-mediated knock down of the microRNA let-7 in silkworms increased the size of larvae and silk glands,thereby.improving the silk production *** this study.we elucidate the molecular mechanism underly.ng of let-7 regulates *** of differentially.expressed genes in response to let-7 knock down revealed enrichment of pathway. associated with cell proliferation and DNA ***-7 dy.regulation affected the cell cy.le and proliferation of the Bomby. mori cell line ***-luciferase and target site mutation assay. showed that BmCDK1 is a direct target gene of let-7,with only.1 binding site on its 3′-untranslated *** interference of BmCDK1 inhibited cell proliferation,but this effect was counteracted by.co-transfection with let-7 ***,let-7 knock down induced BmCDK1 expression and promoted cell proliferation in multiple tissues,and further induced endomitosis in the silk gland in *** down of BmCDK1 resulted in abnormal formation of a new epidermis,and larval development was arrested at the 2nd or 3rd molt *** together,our results demonstrated that BmCDK1 is a novel target of let-7 in cell fate determination,possessing potential for improving silk y.eld in silkworm.

关键词： BmCDKI CRISPR/Cas9 cell proliferation let-7 silkworm