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Effect of Parameter Variation in the BMJ Scheme on the Simulation of MJO Propagation and Structure

Advances in Atmospheric Sciences 2025年第2期42卷 397-409页

作者： Xiaoyu zhu Zhong ZHONG Yimin zhu Yunying LI Yijia HU Yao HA College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073China Key Laboratory for Virtual Geographic Environment School of Geography ScienceNanjing Normal UniversityNanjing 210023China jiangsu Collaborative Innovation Center for Climate Change School of Atmospheric SciencesNanjing UniversityNanjing 210023China

In this study,the Betts-Miller-Janjic(BMJ)convective adjustment scheme in the Weather Research and Forecasting(WRF)model version 4.0 was used to investigate the effect of itsα-parameter,which influences the first-guess potential temperature reference profile on the Madden-Julian oscillation(MJO)propagation and *** study diagnosed the MJO active phase composites of the MJO-filtered outgoing longwave radiation(OLR)during the December-to-February(DJF)period of 2006-2016 over the Indian Ocean(IO),Maritime Continent(MC),and western Pacific(WP).The results show that the MJO-filtered OLR intensity,propagation pattern,and MJO classification(standing,jumping,and propagating clusters)are sensitive to theα-value,but the phase speeds of propagating MJOs are ***,with an increasingα-value,the simulated MJO-filtered OLR intensity increases,and the simulated propagation pattern is *** also show that the intensity and propagation pattern of an eastward-propagating MJO are associated with MJO circulation structures and thermodynamic ***αincreases,the front Walker cell and the low-level easterly anomaly are enhanced,which premoistens the lower troposphere and triggers more active shallow and congestus *** enhanced shallow and congestus convection preconditions the lower to middle troposphere,accelerating the transition from congestus to deep convection,thereby facilitating eastward propagation of the ***,the simulated MJO tends to transfer from standing to eastward propagating asα*** summary,increasing theα-value is a possible way to improve the simulation of the structure and propagation of the MJO.

关键词： MJO WRF model BMJ scheme low-level easterly anomaly

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VP-VO core-shell heterostructure:Harmonizing adsorption and catalysis of polysulfdes for high-performance Li-S batteries

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Journal of Energy Chemistry 2025年第2期101卷 837-843页

作者： Tao Ren Xinji Dong Xiaolan Li Haojie zhu Cheng Yang jinliang zhu School of Resources Environment and Materials State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi University Institute of Materials Research Tsinghua Shenzhen International Graduate School Tsinghua University

*** Lithium-sulfur(Li-S) batteries are broadly considered as an outstanding candidate for the future sustainable energy storage pathway due to their high theoretical capacity,high energy density,and low cost [1,2].However,their practical deployment has been hindered by the sluggish 16-electron conversion process and shuttle of lithium polysulfides(LiPSs),which result in the loss of active sulfu r species [3,4].

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Observer-based event-triggered formation tracking control for second-order multi-agent systems in constrained region

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Science China(Information Sciences) 2025年第2期68卷 151-169页

作者： Fenglan SUN Zhonghua XU Wei zhu ■ KURTHS Key Lab of Intelligent Analysis and Decision on Complex Systems School of ScienceChongqing University of Posts and Telecommunications Key Lab of Intelligent Air-Ground Cooperative Control for Universities in Chongqing College of AutomationChongqing University of Posts and Telecommunications Department of Complexity Science Potsdam Institute for Climate Impact Research Institute of Physics Humboldt University of Berlin

In this paper, an event-triggered time-varying formation tracking control for a class of second-order nonlinear multiagent systems(MAS) operating within a constrained region is investigated. To mitigate the negative effects of external unknown disturbance, a novel disturbance observer with performance guarantees is proposed, enabling precise disturbance *** the artificial potential field(APF) method, a repulsive potential function is introduced to prevent inter-agent collisions as well as collisions with environmental obstacles. To reduce continuous communication and frequent system updates, a sliding mode technique is incorporated into the formation tracking controller, utilizing an event-triggered mechanism. The controller is also applicable to the formation control of MAS in switching-constrained regions. The achievement of the specified timevarying geometric formation is rigorously demonstrated through the Lyapunov framework. Numerical simulations are presented to validate the effectiveness of the theoretical results.

关键词： formation tracking control region constraints repulsive potential function event-triggered mechanism

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Late Paleozoic to early Mesozoic volcanic-sedimentary history of the southeastern margin of the Central Asian Orogenic Belt:Timing of uplift of the Inner Mongolia paleo-uplift

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Science China Earth Sciences 2025年第1期68卷 297-309页

作者： Wenxing HAO jin-Hui YANG Guang zhu State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China School of Resource and Environmental Engineering Hefei University of TechnologyHefei230009China

The Kulun region is located in the eastern Bainaimiao arc belt on the southeastern margin of the Central Asian Orogenic Belt(CAOB),adjacent to the North China Craton(NCC)to the *** region records the closure of the PaleoAsian Ocean during the Paleozoic to early Mesozoic and is key to study the tectonic evolution of the northern margin of the *** conducted zircon U-Pb geochronology and Hf isotope analysis of volcanic-sedimentary and intrusive rocks in the Kulun *** volcanic-sedimentary rocks were previously assigned an early Carboniferous age,but include volcanic rocks with ages of 267–266 Ma and sedimentary rocks with youngest detrital zircon age peaks of 265–244 Ma,which were intruded by a granite with an age of 242 *** indicates that these rocks are actually middle Permian to Middle Triassic in age(267–242Ma)and correspond to the Qingfengshan and Liujiagou ***,two volcanic rock samples have highεHf(t)values(+1.6 to+16.1)and relatively young two-stage Hf model ages(1095–327 Ma),indicating their sources associated with the *** age spectra and Hf isotopic characteristics of detrital zircons from the sedimentary rocks suggest that,during the middle Permian to Middle Triassic,the sedimentary provenance in the Kulun region was mainly the ***,by the Early Jurassic,the provenance changed to the NCC(i.e.,the Inner Mongolia Paleo-uplift,IMPU).This result,combined with the development of a series of conglomerates on the northern margin of the NCC in the Late Triassic(i.e.,Xingshikou,Xiaoyingzi,and Xiaohekou formations),indicates the Kulun region experienced an abrupt change in paleogeography during the Late Triassic,with the IMPU undergoing significant uplift and thus becoming the main sediment source in the Kulun *** on the Late Triassic alkaline igneous belt(235–215 Ma)in the IMPU,we speculate that this uplift was caused by detachment of the southward-subducting Paleo-Asian oceanic plate,which occurred in a post-o

关键词： Central Asian Orogenic Belt the North China Craton Zircon geochronology Hf isotopes Inner Mongolia Paleo-uplift

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Multi-Objective optimization for stable and efficient cargo transportation of partial space elevator

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Defence Technology(防务技术) 2025年第2期44卷 17-29页

作者： Gefei Shi Zheng H.zhu School of Aeronautics and Astronautics Sun Yat-sen UniversityGuangzhou 510275China Shenzhen Key Laboratory of Intelligent Microsatellite Constellation Shenzhen 518107China Department of Mechanical Engineering York University4700 Keele StreetTorontoCanada

This paper proposed a new libration decoupling analytical speed function(LD-ASF)in lieu of the classic analytical speed function to control the climber's speed along a partial space elevator to improve libration stability in cargo *** LD-ASF is further optimized for payload transportation efficiency by a novel coordinate game theory to balance competing control objectives among payload transport speed,stable end body's libration,and overall control input via model predictive *** transfer period is divided into several sections to reduce computational *** validity and efficacy of the proposed LD-ASF and coordinate game-based model predictive control are demonstrated by computer *** results reveal that the optimized LD-ASF results in higher transportation speed,stable end body's libration,lower thrust fuel consumption,and more flexible optimization space than the classic analytical speed function.

关键词： Partial space elevator Stable transportation Libration decoupling analytical speed function Coordinate game Model predictive control Pareto optimization

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Cyano migration-mediated radical-polar crossover cyclopropanation

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Science China Chemistry 2025年第1期68卷 241-248页

作者： Ziqiang Wang Yasu Chen jie Li Chen zhu Key Laboratory of Organic Synthesis of jiangsu Province College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Frontiers Science Center for Transformative Molecules Zhangjiang Institute for Advanced Study and Shanghai Key Laboratory for Molecular Engineering of Chiral DrugsShanghai Jiao Tong UniversityShanghai 200240China

We report a novel cyano migration-mediated radical-polar crossover process,whereby both the sulfonylcyanation of aliphatic alkenes and the formation of cyclopropanes are concurrently *** transformation yields a diverse array of multisubstituted cyclopropanes under mild photocatalytic *** studies elucidate that the reaction proceeds via intramolecular nucleophilic substitution,leading to the formation of the cyclopropane derivatives.

关键词： cyclopropanation cyano migration radical-polar crossover radical reactions

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Neoadjuvant therapy:Dawn of reducing the high post-surgery recurrence rate of hepatocellular carcinoma

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World Journal of Gastrointestinal Surgery 2025年第3期17卷 57-68页

作者： Xiao-Dong Zhang Lu-Yi Zhang jia-Liang Luo Ke-heng Yu Ke-Lei zhu Department of Hepatopancreatobiliary Surgery The Affiliated People's Hospital of Ningbo UniversityNingbo 315040Zhejiang ProvinceChina Zhejiang Provincial Key Laboratory of Pathophysiology Health Science CenterNingbo UniversityNingbo 315211Zhejiang ProvinceChina

The high postoperative recurrence rate remains a major challenge in the treatment of hepatocellular carcinoma(HCC)following *** research has been delved into investigating the role of neoadjuvant therapy on the prognosis of resectable *** trends in combination therapy with molecularly targeted agents and immune checkpoint inhibitors have significantly improved the efficacy of systemic antitumor treatments,yielding survival benefits exceeding 40%.Neoadjuvant therapy for HCC,whether based on systemic antitumor treatments,locoregional therapies,or their combination,has emerged as a promising research ***,there remains a matter of debate on neoadjuvant *** this review,we summarize and discuss the research progress and challenges of neoadjuvant therapy for HCC over the past five years from the perspective of Chinese guidelines to provide new insights and future directions in this field.

关键词： Hepatocellular carcinoma Neoadjuvant therapy Locoregional therapy Molecularly targeted drug Immune checkpoint inhibitor

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Airborne fungal communities are more susceptible to anthropogenic activities than bacteria

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Journal of Environmental Sciences 2025年第3期149卷 564-573页

作者： Yuanyuan Pan Zhiwei Zuo Xueyun Huang Renguo zhu School of Water Resources&Environmental Engineering East China University of TechnologyNanchang 330013China jiangxi Province Key Laboratory of the Causes and Control of Atmospheric Pollution East China University of TechnologyNanchang 330013China

Airborne microorganisms(AM)have significant environmental and health *** studies have been conducted to investigate the factors influencing the composition and diversity of ***,the knowledge of AM with anthropogenic activities has not reach a *** this study,we took advantage of the dramatic decline of outdoor anthropogenic activities resulting from COVID-19 lockdown to reveal their *** collected airborne particulate matter before and during the lockdown period in two *** results showed that it was fungal diversity and communities but not bacteria obviously different between pre-lockdownand lockdown samples,suggesting that airborne fungiwere more susceptible to anthropogenic activities than ***,after the implementation of lockdown,the co-occurrence networks of both bacterial and fungal community became more complex,whichmight be due to the variation of microbial ***,Mantel test and correlation analysis showed that air pollutants also partly contributed to microbial *** fungal community was more affected by air pollutants than bacterial ***,some human pathogens like Nigrospora and Arthrinium were negatively correlated with air ***,our study highlighted the more impacts of anthropogenic activities on airborne fungal community than bacterial community and advanced the understanding of associations between anthropogenic activities and AM.

关键词： COVID-19 lockdown Anthropogenic activities Airborne microorganisms Response Air pollutants

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Spatial confinement:An effective strategy to improve H_(2)O and SO_(2) resistance of the expandable graphite-modified TiO_(2)-supported Pt nanocatalysts for CO oxidation

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Journal of Environmental Sciences 2025年第2期148卷 57-68页

作者： Hongtai zhu Wenge Qiu RuiWu Kai Li Hong He Key Laboratory of Beijing on Regional Air Pollution Control Beijing Key Laboratory for Green Catalysis and SeparationBeijing University of TechnologyBeijing 100124China Advanced E-Catal.Corporation Ltd.Beijing 100025China

The expandable graphite(EG)modified TiO_(2) nanocomposites were prepared by the high shearmethod using the TiO_(2) nanoparticles(NPs)and EG as precursors,in which the amount of EG doped in TiO_(2) was 10 wt.%.Followed by the impregnation method,adjusting the pH of the solution to 10,and using the electrostatic adsorption to achieve spatial confinement,the Pt elementswere mainly distributed on the exposed TiO_(2),thus generating the Pt/10EG-TiO_(2)-10 *** best CO oxidation activity with the excellent resistance to H_(2)O and SO_(2) was obtained over the Pt/10EG-TiO_(2)-10 catalyst:CO conversion after 36 hr of the reaction was ca.85%under the harsh condition of 10 vol.%H_(2)O and 100 ppm SO_(2) at a high gaseous hourly space velocity(GHSV)of 400,000 hr−*** properties of the catalystswere characterized by various *** results showed that the electrostatic adsorption,which riveted the Pt elements mainly on the exposed TiO_(2) of the support surface,reduced the dispersion of Pt NPs on EG and achieved the effective dispersion of Pt NPs,hence significantly improving CO oxidation activity over the Pt/10EG-TiO_(2)-10 *** 10 wt.%EG doped in TiO_(2) caused the TiO_(2) support to form a more hydrophobic surface,which reduced the adsorption of H_(2)O and SO_(2) on the catalyst,greatly inhibited deposition of the TiOSO4 and formation of the PtSO4 species as well as suppressed the oxidation of SO_(2),thus resulting in an improvement in the resistance to H_(2)O and SO_(2) of the Pt/10EG-TiO_(2)-10 catalyst.

关键词： Expandable graphite Electrostatic adsorption Titania supported platinum CO oxidation Resistance to H_(2)O and SO_(2)

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Research on the X-ray polarization deconstruction method based on hexagonal convolutional neural network

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Nuclear Science and Techniques 2025年第2期36卷 49-61页

作者： Ya-Nan Li jia-Huan zhu Huai-Zhong Gao Hong Li ji-Rong Cang Zhi Zeng Hua Feng Ming Zeng Key Laboratory of Particle&Radiation Imaging Tsinghua UniversityMinistry of EducationBeijing 100084China Department of Engineering Physics Tsinghua UniversityBeijing 100084China Department of Astronomy Tsinghua UniversityBeijing 100084China StarDetect Co. LtdBeijing 100084China

Track reconstruction algorithms are critical for polarization *** neural networks(CNNs)are a promising alternative to traditional moment-based track reconstruction ***,the hexagonal grid track images obtained using gas pixel detectors(GPDs)for better anisotropy do not match the classical rectangle-based CNN,and converting the track images from hexagonal to square results in a loss of *** developed a new hexagonal CNN algorithm for track reconstruction and polarization estimation in X-ray polarimeters,which was used to extract the emission angles and absorption points from photoelectron track images and predict the uncer-tainty of the predicted emission *** simulated data from the PolarLight test were used to train and test the hexagonal CNN *** individual energies,the hexagonal CNN algorithm produced 15%-30%improvements in the modulation factor compared to the moment analysis method for 100%polarized data,and its performance was comparable to that of the rectangle-based CNN algorithm that was recently developed by the Imaging X-ray Polarimetry Explorer team,but at a lower computational and storage cost for preprocessing.

关键词： X-ray polarization Track reconstruction Deep learning Hexagonal conventional neural network

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