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Numerical Simulation of the Settling Flux of Biodeposition in a Bay with cage culture through Similarity theory and a Simplified pollution Source

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Journal of Ocean University of china 2024年第1期23卷 247-254页

作者： lIU Yao cHEN Yifan ge changzi Marine college Shandong UniversityWeihai 264209China

the settling flux of biodeposition affects the environmental quality of cage culture areas and determines their environmental carrying *** and effective simulation of the settling flux of biodeposition is extremely important for determining the spatial distribution of ***,biodeposition in cage culture areas without specific emission rules can be simplified as point source *** is a fluid simulation software that can simulate the dispersion of particulate matter simply and *** on the simplification of pollution sources and bays,the settling flux of biodeposition can be easily and effectively simulated by Fluent fluid *** the present work,the feasibility of this method was evaluated by simulation of the settling flux of biodeposition in Maniao Bay,Hainan province,china,and 20 sampling sites were selected for determining the settling *** sampling sites p1,p2,p3,p4,p5,z1,z2,z3,z4,A1,A2,A3,A4,B1,B2,c1,c2,c3 and c4,the measured settling fluxes of biodeposition were 26.02,15.78,10.77,58.16,6.57,72.17,12.37,12.11,106.64,150.96,22.59,11.41,18.03,7.90,19.23,7.06,11.84,5.19 and 2.57 g d^(−1)m^(−2),*** simulated settling fluxes of biodeposition at the corresponding sites were 16.03,23.98,8.87,46.90,4.52,104.77,16.03,8.35,180.83,213.06,39.10,17.47,20.98,9.78,23.25,7.84,15.90,6.06 and 1.65 g d^(−1)m^(−2),*** was a positive correlation between the simulated settling fluxes and measured ones(R=0.94,p=2.22×10^(−9)which implies that the spatial differentiation of biodeposition flux was well ***,the posterior difference ratio of the simulation was 0.38,and the small error probability was 0.94,which means that the simulated results reached an acceptable level from the perspective of relative ***,if nonpoint source pollution is simplified to point source pollution and open waters are simplified based on similarity theory,the setting flux of biodeposition i

关键词： fluent fluid simulation software pollution source simplification posterior difference ratio similarity theory Spear-man correlation

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Digital light processing based multimaterial 3D printing:challenges,solutions and perspectives

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International Journal of Extreme Manufacturing 2024年第4期6卷 151-174页

作者： Jianxiang cheng Shouyi Yu Rong wang Qi ge Shenzhen Key laboratory of Soft Mechanics&Smart Manufacturing Southern University of Science and TechnologyShenzhen 518055People's Republic of China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055People's Republic of China

Multimaterial(MM)3D printing shows great potential for application in metamaterials,flexible electronics,biomedical devices and robots,since it can seamlessly integrate distinctive materials into one printed *** numerous MM 3D printing technologies,digital light processing(Dlp)MM 3D printing is compatible with a wide range of materials from hydrogels to ceramics,and can print MM 3D structures with high resolution,high complexity and fast *** paper introduces the fundamental mechanisms of Dlp 3D printing,and reviews the recent advances of Dlp MM 3D printing technologies with emphasis on material switching methods and material contamination *** also summarizes a number of typical examples of Dlp MM 3D printing systems developed in the past decade,and introduces their system structures,working principles,material switching methods,residual resin removal methods,printing steps,as well as the representative structures and ***,we provide perspectives on the directions of the further development of Dlp MM 3D printing technology.

关键词： multimaterial 3D printing digital lightprocessing multimaterial 3Dstructures

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Awells-Riley/based cOVID-19 infectiousrisk assessment model combining both short rangeandroom scale effects

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Building Simulation 2024年第1期17卷 93-111页

作者： Yinshuai Feng Yifan Fan Xiaoyu luo Jian ge college of civil Engineering and Architecture Zhejiang UniversityHangzhouChina center for Balance Architecture Zhejiang UniversityHangzhouChina International Research center for green Building and low-carbon city International CampusZhejiang UniversityHainingChina

there is growing evidence of the high transmission potential of cOVID-19 through virus-laden *** aerosols are inhaled in various concentrations,an overall assessment of transmission risks at different indoor scales is ***,a comprehensive risk assessment method that evaluates the direct link between short-range and room-scale zones is stl *** this paper,a risk assessment model combining both short-range and room-scale effects is developed to obtain effective reproduction number in confined indoor environments,called turbulent Jet wells Riley(tJwR)*** with the viral load data and aerosol generation data of different human respiratory activities,the Monte carlo simulation method is applied to calculate the quanta emission rate,which further provides the input parameters of the tJwR *** known outbreaks(Hangzhou banquet hall X,guangzhou restaurant Y,and Hong Kong restaurant z,china)are chosen to validate the tJwR *** show that the tJwR model is more efficient than the original wells-Riley *** average relative error of the tJwR model ranges between 9%and 44%,while for the wells-Riley model,it ranges between 57%and 78%.the tJwR model also proves that infection risk assessments using the well-mixed assumption can systematically underestimate the transmission risk for those close to the ***,there is a significant positive linear correlation between the total number of exposed individuals at the short-range and the effective reproduction *** newly developed tJwR model has great potential for rapid and real-time overall airborne transmission risk assessment in buildings and cities.

关键词： cOVID-19 airborne transmission infection risk wells-Riley model Monte carlo simulation

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Asymmetrical Fault current calculation Method and Influencing Factors Analysis of Droop-controlled Inverters

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cSEE Journal of power and Energy Systems 2024年第2期10卷 562-573页

作者： Huimin zhao zhikang Shuai Jun ge An luo weimin wu z.John Shen college of Electrical and Information Engineering Hunan UniversityChangsha 410006China Electrical Engineering Department Shanghai Maritime UniversityShanghai 201306China Department of Electrical and computer Engineering Ilinois Institute of TechnologyChicagoIL 60616 USA

Since the fault dynamic of droop-controlled inverter is different from synchronous generators (Sgs), protection devices may become invalid, and the fault overcurrent may damage power electronic devices and threaten the safety of the microgrid. therefore, it is imperative to conduct a comprehensive fault analysis of the inverter to guide the design of protection schemes. However, due to the complexity of droop control strategy, existing literatures have simplified asymmetric fault analysis of droop-controlled inverters to varying degrees. therefore, accurate fault analysis of a droop-controlled inverter is needed. In this paper, by analyzing the control system, an accurate fault model is established. Based on this, a calculation method for instantaneous asymmetrical fault current is proposed. In addition, the current components and current characteristics are analyzed. It was determined that fault currents are affected by control loops, fault types, fault distance and nonlinear limiters. In particular, the influences of limiters on the fault model, fault current calculation and fault current characteristics were analyzed. through detailed analysis, it was found that dynamics of the control loop cannot be ignored, the fault type and fault distance determine fault current level, and part of the limiters will totally change the fault current trend. Finally, calculation and experimental results verify the correctness of the proposed method.

关键词： Asymmetrical fault analysis droop control fault current calculation method limiter transient fault characteristics

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Molecular packing tuning via chlorinated end group enables efficient binary organic solar cells over 18.5%

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carbon Energy 2024年第3期6卷 196-203页

作者： Yafeng li zhenyu chen Xingzheng Yan ziyi ge zhejiang Business technology Institute NingboZhejiangChina zhejiang Engineering Research center for Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingboZhejiangChina center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina

Designing novel nonfullerene acceptors(NFAs)is of vital importance for the development of organic solar cells(OSc).Modification on the side chain and end group are two powerful tools to construct efficient ***,based on the high-performance l8BO,we selected 3-ethylheptyl to substitute the inner chain of 2-ethylhexyl,obtaining the backbone of *** we introduced different halogen atoms of fluorine and chlorine on 2-(3-oxo-2,3-dihydro-1Hinden-1-ylidene)malononitrile end group(Eg)to construct efficient NFAs named BON3-F and BON3-cl,*** donor D18 was chosen to combine with two novel NFAs to construct OSc ***,D18:BON3-cl-based device shows a remarkable power conversion efficiency(pcE)of 18.57%,with a high open-circuit voltage(V_(Oc))of 0.907 V and an excellent fill factor(FF)of 80.44%,which is one of the highest binary pcE of devices based on D18 as the ***,BON3-F-based device shows a relatively lower pcE of 17.79%with a decreased FF of 79.05%.the better photovoltaic performance is mainly attributed to the red-shifted absorption,higher electron and hole mobilities,reduced charge recombination,and enhanced molecular packing in the D18:BON3-cl ***,we performed stability tests on two binary systems;the D18:BON3-cl and D18:BON3-F devices maintain 88.1%and 85.5%of their initial efficiencies after 169 h of storage at 85°c in an N2-filled glove box,*** work demonstrates the importance of selecting halogen atoms on Eg and provides an efficient binary system of D18:BON3-cl for further improvement of pcE.

关键词： binary organic solar cell chlorinated end group molecular packing

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End-group modulation of phenazine based non-fullerene acceptors for efficient organic solar cells with high open-circuit voltage

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Journal of Energy chemistry 2024年第1期88卷 461-468,I0011页

作者： Yahui zhang Yafeng li Ruixiang peng Yi Qiu Jingyu Shi zhenyu chen Jinfeng ge cuifen zhang zheng tang ziyi ge School of Materials Science and Engineering Shanghai UniversityShanghai 200444China zhejiang Business technology Institute Ningbo 315012ZhejiangChina zhejiang provincial Engineering Research center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201ZhejiangChina center for Advanced low-dimension Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

phenazine-based non-fullerene acceptors(NFAs)have demonstrated great potential in improving the power conversion efficiency(pcE)of organic solar cells(OScs).Halogenation is known to be an effective strategy for increasing optical absorption,refining energy levels,and improving molecular packing in organic ***,a series of NFAs(pz Ic-4H,pz Ic-4F,pz Ic-4cl,pz Ic-2Br)with phenazine as the central core and with/without halogen-substituted(dicyanomethylidene)-indan-1-one(Ic)as the electron-accepting end group were synthesized,and the effect of end group matched phenazine central unit on the photovoltaic performance was systematically *** photophysical and morphological analyses revealed that the pM6:pz Ic-4F blend involves efficient exciton dissociation,higher charge collection and transfer rates,better crystallinity,and optimal phase ***,OScs based on pM6:pz Ic-4F as the active layer exhibited a pcE of 16.48%with an open circuit voltage(Voc)and energy loss of 0.880 V and 0.53 e V,***,this work demonstrated a promising approach by designing phenazine-based NFAs for achieving high-performance OScs.

关键词： Organic solar cells Non-fullerene acceptor phenazine central core End group

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A direct polymeric carbon nitride/tungsten oxide z-scheme heterostructure for efficient photocatalytic hydrogen generation via reforming of plastics into value-added chemicals

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Rare Metals 2024年第8期43卷 3771-3783页

作者： Rui-zhe wang zhi lin Yi-Qing wang Kai-Ni zhang ge-Hong zhang Jie zhang Samuel S.Mao Shao-Hua Shen International Research center for Renewable Energy State Key Laboratory of Multiphase Flow in Power EngineeringXi'an Jiaotong UniversityXi'an 710049China School of civil and Architecture Engineering Xi'an Technological UniversityXi'an 710021China Department of Mechanical Engineering University of California at BerkeleyBerkeleyCA94720USA

to promote charge transfer and separation for efficient photocatalysis,a direct z-scheme heterostructure was constructed by coupling polymeric carbon nitride(pcN) and wO_(3).Interestingly,the obtained pcN/wO_(3)z-scheme heterostructure could photocataly tic ally produce hydrogen and value-added chemicals(e.g.,formate and acetate) by reforming of plastic polylactic acid(plA) in alkaline aqueous *** optimizing wO_(3) contents and reaction conditions,the obtained pcN/wO_(3)heterostructure exhibits much increased photocatalytic activity for plA photoreforming under visible light,with hydrogen evolution rate reaching 402.90 μmol·g~(-1)·h~(-1),which is 3.5 times that of *** is revealed that the z-scheme charge transfer between pcN and wO_(3) mainly contributes to the promoted charge separation and thus the improved photocatalytic ***,with h+and·OH experimentally evidenced as the predominant active species,a possible reaction pathway for the reforming of plA into value-added chemicals(e.g.,formate and acetate)over pcN/wO_(3) z-scheme heterostructure is cleared by monitoring the reaction intermediates and *** work paves a carbon neutrality and scalable route toward the synergistical production of hydrogen and value-added chemicals by utilizing and recycling plastic waste.

关键词： carbon nitride z-scheme heterojunction plastic waste conversion photocatalytic H_(2)production Value-added chemicals

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Effects of habitat configuration on biodiversity along gradients of forest cover on the Swiss plateau

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Forest Ecosystems 2024年第5期11卷 659-669页

作者： Yiwen pan Anna M.Hersperger gang ge Michael p.Nobis Key laboratory of poyang lake Environment and Resource Utilization Ministry of EducationSchool of Resources&EnvironmentNanchang UniversityNanchang330031China Swiss Federal Institute for Forest Snow and Landscape Research WSLZürcherstrasse 1118903BirmensdorfSwitzerland School of life Sciences Nanchang UniversityNanchang330031China

the negative effects of habitat loss on biodiversity are undisputed,while the effect of habitat configuration,i.e.,the spatial arrangement of habitat area,has been debated for *** develop a more comprehensive understanding,it is important to know when and how configuration *** this study,we tested whether forest configuration influences the richness of species in groups characterized by varying shade tolerance in different ways and how such effects are related to habitat amount(i.e.,the percentage of forest cover)at the landscape *** on 104 survey plots(each measuring 1km^(2))of vascular plants on the Swiss plateau,and using two statistical approaches(i.e.,multiple regression and path analysis),we modeled the effects of habitat amount and configuration(measured as number of forest patches,total edge length,and proximity index)across all the plots and separately for three habitat amount classes:30%forest *** we modeled all plots together,we found that,after controlling for habitat amount,the forest configuration significantly affected species *** we considered the different habitat amount classes separately,most of the significant effects of habitat configuration on species richness occurred only for habitat amounts oft ***,the response to forest configuration differed among species with different shade *** forest area wasthe effects of the number of patches and the total edge length on the species richness of light-demanding forest species were greater than the effect of habitat amount,whereas neither configuration metric affected the richness of shade-tolerant *** conclusion,our findings highlight the importance of configuration in landscapes with a small amount of *** the same time,they demonstrate that considering the confounding factors(*** traits)is important for understanding the effects of forest configuration on biodiversity and that genera

关键词： Forest plants Habitat amount landscape fragmentation Species richness Swiss plateau

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Experimental investigation of dynamic characteristics of leaching tubing for solution mining of salt cavern carbon and energy storage

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petroleum Science 2024年第4期21卷 2703-2722页

作者： Yin-ping li Xin-Bo ge Xi-lin Shi Hong-ling Ma State Key laboratory of geomechanics and geotechnical Engineering Institute of Rock and Soil Mechanics Chinese Academy of Sciences University of chinese Academy of Sciences college of Energy and Mining Engineering Shandong University of Science and Technology State Key laboratory of Mining Disaster prevention and control co-founded by Shandong province and the Ministry of Science and technology Shandong University of Science and Technology

Salt caverns are extensively utilized for storing various substances such as fossil energy, hydrogen,compressed air, nuclear waste, and industrial solid waste. In china, when the salt cavern is leached through single-well water solution mining with oil as a cushion, engineering challenges arise with the leaching tubing, leading to issues like damage and instability. these problems significantly hinder the progress of cavern construction and the control of cavern shape. the primary cause of this is the flowinduced vibration instability of leaching tubing within a confined space, which results in severe bending or damage to the tubing. this study presents a model experimental investigation on the dynamic characteristics of leaching tubing using a self-developed liquid-solid coupling physical model experiment apparatus. the experiment utilizes a silicone-rubber pipe(SRp) and a polycarbonate pipe(pcp) to examine the effects of various factors on the dynamic stability of cantilevered pipes conveying fluid. these factors include external space constraint, flexural rigidity, medium outside the pipe, overhanging length, and end conditions. the experiments reveal four dynamic response phenomena: water hammer, static buckling, chaotic motion, and flutter instability. the study further demonstrates that the length of the external space constraint has a direct impact on the flutter critical flow velocity of the cantilevered pipe conveying fluid. Additionally, the flutter critical flow velocity is influenced by the end conditions and different external media.

关键词： Salt cavern storage Solution mining leaching tubing Experimental investigation Flutter instability

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two-photon polymerization-based 4D printing and its applications

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International Journal of Extreme Manufacturing 2024年第1期6卷 1-25页

作者： Bingcong Jian Honggeng li Xiangnan He Rong wang Hui Ying Yang Qi ge Shenzhen Key laboratory of Soft Mechanics&Smart Manufacturing Southern University of Science and TechnologyShenzhen 518055People’s Republic of China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055People’s Republic of China pillar of Engineering product Development Singapore University of Technology and Design8 Somapah RoadSingapore 487372Singapore

two-photon polymerization(tpp)is a cutting-edge micro/nanoscale three-dimensional(3D)printing technology based on the principle of two-photon *** surpasses the diffraction limit in achieving feature sizes and excels in fabricating intricate 3D micro/nanostructures with exceptional *** concept of 4D entails the fabrication of structures utilizing smart materials capable of undergoing shape,property,or functional changes in response to external stimuli over *** integration of tpp and 4D printing introduces the possibility of producing responsive structures with micro/nanoscale accuracy,thereby enhancing the capabilities and potential applications of both *** paper comprehensively reviews tpp-based 4D printing technology and its diverse ***,the working principles of tpp and its recent advancements are ***,the optional4D printing materials suitable for fabrication with tpp are ***,this review paper highlights several noteworthy applications of tpp-based 4D printing,including domains such as biomedical microrobots,bioinspired microactuators,autonomous mobile microrobots,transformable devices and robots,as well as anti-counterfeiting *** conclusion,this paper provides valuable insights into the current status and future prospects of tpp-based4D printing technology,thereby serving as a guide for researchers and practitioners.

关键词： two-photonpolymerization 4D printing nano/micro fabrication microrobot

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