检索结果-南通市图书馆

Rapid detection of colored and colorless macroand micro-plastics in complex environment via near-infrared spectroscopy and machine learning

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2025年第1期147卷 512-522页

作者： Hui-Huang Zou Pin-Jing He wei Peng Dong-Ying lan Hao-Yang Xian Fan lü Hua Zhang Institute of Waste Treatment&Reclamation College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

To better understand the migration behavior of plastic fragments in the environment,development of rapid non-destructive methods for in-situ identification and characterization of plastic fragments is ***,most of the studies had focused only on colored plastic fragments,ignoring colorless plastic fragments and the effects of different environmental media(backgrounds),thus underestimating their *** address this issue,the present study used near-infrared spectroscopy to compare the identification of colored and colorless plastic fragments based on partial least squares-discriminant analysis(PlS-DA),extreme gradient boost,support vector machine and random forest *** effects of polymer color,type,thickness,and background on the plastic fragments classification were ***-DA presented the best and most stable outcome,with higher robustness and lower misclassification *** models frequently misinterpreted colorless plastic fragments and its background when the fragment thickness was less than 0.1mm.A two-stage modeling method,which first distinguishes the plastic types and then identifies colorless plastic fragments that had been misclassified as background,was *** method presented an accuracy higher than 99%in different *** summary,this study developed a novel method for rapid and synchronous identification of colored and colorless plastic fragments under complex environmental backgrounds.

关键词： Colorless microplastics Near-infrared hyperspectral imaging Plastic identification Partial least squares discriminant analysis Machine learning

B2-CuZr reinforced amorphous alloy matrix composites:A review

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Foundry 2025年第1期22卷 1-11页

作者： wei Guo Run-hua Huang Zhen Zhang Mi Zhao Jin-cheng Wang Yan-qiang Qiao Shu-lin lü Shu-sen Wu State Key lab of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China State Key laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China School of Aerospace Engineering Huazhong University of Science and TechnologyWuhan 430074China Research Institute of Huazhong University of Science and Technology in Shenzhen Shenzhen 518057GuangdongChina

B2-CuZr phase reinforced amorphous alloy matrix composites has become one of the research hotspots in the field of materials science due to the“transformation-induced plasticity”phenomenon,which makes the composites show better macroscopic plastic deformability and obvious work-hardening behavior compared to the conventional amorphous alloy matrix composites reinforced with ductile ***,the in-situ metastable B2-CuZr phase tends to undergo eutectoid decomposition during solidification,and the volume fraction,size,and distribution of B2-CuZr phase are difficult to control,which limits the development and application of these *** date,much efforts have been made to solve the above problems through composition optimization,casting parameter tailoring,and post-processing *** this study,a review was given based on relevant studies,focusing on the predictive approach,reinforcing mechanism,and microstructure tailoring methods of B2-CuZr phase reinforced amorphous alloy matrix *** research focus and future prospects were also given for the future development of the present composite system.

关键词： amorphous alloy matrix composite B2-CuZr phase plasticity microstructure tailoring

Record-breaking bifunctional oxygen electrocatalyst accomplished by a data-driven approach for zinc-air batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 144-145页

作者： Deviprasath Chinnadurai Zhi wei Seh Institute of Materials Research and Engineering(IMRE) Agency for ScienceTechnologyand Research(A*STAR)2 Fusionopolis WayInnovis#08-03Singapore 138634Singapore

Rechargeable zinc-air batteries(ZABs) have recently drawn great attention in energy research due to their high theoretical capacity,low costs, and inherently safe nature [1–3]. However, the sluggish cathode reactions necessitate the development of bifunctional oxygen electrocatalysts with lower ΔE indicator values. The ΔE indicator is commonly employed to quantitatively evaluate the electrocatalytic activity of a bifunctional oxygen electrocatalyst,representing the overall overpotential from oxygen reduction reaction(ORR) to oxygen evolution reaction(OER).

关键词： breaking representing accomplished

Multiscale and multiphysics explorations of the transient deposition processes and additive characteristics during laser 3D printing

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2021年第18期77卷 196-208页

作者： H.l.wei F.Q.liu l.wei T.T.liu W.H.liao School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing.210094China State Key laboratory of Solidification Processing Northwestern Poly technical UniversityXi'an710072China

laser directed energy deposition(DED)involves complex physical processes,and the trial and error examinations are time consuming and cost *** research paradigm can be reshaped using advanced phenomenological models via computing the spatiotemporal variations of the build *** this work,multi-layer and multi-track laser DED of Ti-6 Al-4 V were systematically explored on multiple scales including the 1D track,the 2D layer and the 3D full build considering the complex transport of energy,mass,and momentum in the moving freeform molten *** results showed that convex,nearflat,and wavy builds were generated using gradually larger hatch *** profiles of individual tracks and layers were extracted through the unique advantages of the *** individual tracks exhibited various patterns and rotated with specific inclinations to form distinct layer *** net increments of the deposit generated upon the printing of a new track during the continuous deposition process showed that the smaller hatch spacing caused higher overlap rate of horizontally adjacent tracks but lower remelting rate of vertically adjacent tracks in neighboring *** 3D numerical model was validated with corresponding experiments for various process *** scientific findings can provide useful insights for further researches of DED.

关键词： Additive manufacturing Multi-layer and multi-track Numerical model Build features Molten pool

Release characteristics of arsenic from sediments and its source or sink competition with phosphorus:A case of a great lake with grass-algae alternation

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2025年第3期149卷 278-287页

作者： Shuhang Wang Yongsheng Chang wei Huang Dianhai Yang Feifei Che State Key laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China College of Environmental Science and Engineering Donghua UniversityShanghai 201620China National Engineering laboratory for lake Pollution Control and Ecological Restoration Chinese Research Academy of Environmental SciencesBeijing 100012China

The arsenic(As)release from sediments in great lakes is affected by various *** this study,the characteristics of As release fromsediments was investigated,and the As sources and sinks with the strengths in sediments from different areas(grass-type,algae-type,and grass-algae alternation areas)in great shallow lakes(Taihu lake,China)were analyzed,and the influence of P competition in the process of As release was also *** results showed that changing trend of the values of equilibrium As concentration in sediments were consistent with the regional changes(0 to 28.12μg/l),and the sediments from algaetype areas had the higher *** sediments from western lake and northwest lake bay were a strong As and a weak P source,and the north lake bay had the opposite trend of these two *** P source competition with As from the sediments occurred in algae-type *** grass-type areas had strong As and P retention capacities,indicating a sink role of sediment with high As and P sorption *** degree of As and P saturation had similar trend in sediments,and the grass-type areas had the higher values,18.3%-21.4%and 15.31%-20.34%,*** analysis results showed that most of As release contribution was from the bottom(30-50 cm)sediments,and the surface(0-10 cm)sediments from algae-type areas contributed more to the overlying water than other region.

关键词： Arsenic Phosphorus Sediment Source and sink Contribution

Controllable chaos in the coupled waveguide-optomechanical system with phase shifter

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第04期Mechanics & Astronomy) .卷 30-38页

作者： Deng-wei Zhang Pei-Qi Qin li-li Zheng Zhi-Ming Zhan Xin-You lü Department of Mathematics and Physics Luoyang Institute of Science and Technology School of Computer and Information Engineering School of Software Luoyang Institute of Science and Technology School of Artificial Intelligence Jianghan University School of Physics Huazhong University of Science and Technology

We theoretically investigate chaotic dynamics in an optomechanical system composed of a whispering-gallery-mode(WGM) microresonator and a sensor. We find that tuning the optical phase using a phase shifter and modifying the coupling strength via a unidirectional waveguide(IWG) can induce chaotic motion. The underlying reason for this phenomenon is that adjusting the phase and coupling strength via the phase shifter and IWG bring the system close to an exceptional point(EP), where field localization dynamically enhances the optomechanical nonlinearity, leading to the generation of chaotic motion. In addition, due to the sensitivity of chaos to phase in the vicinity of the EP, we propose a theoretical scheme to measure the optical phase perturbations using chaos. Our work may offer an alternative approach to chaos generation with current experimental technology and provide theoretical guidance for optical signal processing and chaotic secure communication.

关键词：

Design,Synthesis and Pharmacological Evaluation of Novel 4-Phenoxyquinoline Derivatives as VEGFR2 Kinase Inhibitors for Tumor Treatment

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2025年第1期41卷 66-78页

作者： JIANG wei CHEN Jiayan WANG Haifeng XUE Aiqi ZHANG Xinyang GUAN Jichi wei lulu CAI Jianfeng HU Yong lIU Dan College of Chemical Engineering Shenyang University of Chemical TechnologyShenyang110142P.R.China Institute of Materials Engineering College of Engineering and Applied SciencesNanjing UniversityNanjing210093P.R.China Department of Chemistry University of South Florida4202 E.Fowler AveTampaFL33620USA

Vascular endothelial growth factor 2(VEGFR2)plays a vital role in regulating of tumor metastasis and angiogenesis,which has emerged as one of the effective targets for clinical tumor ***,a series of novel facilely accessible 4-phenoxyquinoline derivatives was prepared and assessed for their antitumor activity against three human tumor cell lines(SGC-7901,HepG2 and A549).Among these compounds,6a,6b and 6c show strong antitumor activity on HepG2 cells[the drug concentration of eliminating half of tumor cells(IC_(50))=9.33,1.84,8.54μmol/l].Notably,compound 6b shows potent selective inhibitory activity against VEGFR2 kinase with an IC_(50) value of 4.66 nmol/*** excellent anti-angiogenesis capability of compound 6b was confirmed by tube formation and chick chorioallantoic membrane(CAM)*** vivo studies confirmed that compound 6b was able to inhibit tumor growth in HepG2 xenografts of BAlB/c nude mice without obvious side or toxic *** results demonstrated that compound 6b exhibited remarkable anti-angiogenesis and tumor growth inhibitory effects with less toxicity in vitro and in vivo *** findings highlighted the potential of compound 6b as a promising VEGFR2 kinase inhibitor for the development of antitumor drugs.

关键词： ar endothelial growth factor 2(VEGFR2) 4-Phenoxyquinoline Inhibitor Anti-tumor Angiogenesis

Eosinophilia and clonorchiasis presenting as fever of unknown origin in adult patients

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Emergency Medicine 2025年第1期16卷 91-93页

作者： Jie Zhong Xin Zhou wei Gu Department of Emergency Medicine Chuiyangliu HospitalBeijing 100022China

Fever of unknown origin(FUO)is recognized as fever with uncertain diagnosis despite three days of hospital admission or three or more outpatient visits.[1]Acute liver fluke infection is characterized by fever,right upper quadrant pain,hepatomegaly,jaundice,and peripheral blood *** contrast,chronic liver fluke infection is asymptomatic in its early stage,but can easily progress to cirrhosis,cancer,or bile duct cancer *** diagnosis of clonorchiasis is particularly challenging in non-endemic *** herein report an unusual case of liver fluke infection in a patient who presented with FUO and eosinophilia.A 38-year-old male was admitted to our hospital with a history of intermittent and recurrent fever for over 10 d and a history of sudden abdominal pain for1 *** had no other medical *** than 10d ago,he visited our emergency department because of FUO,with his body temperature reaching 39.7℃,and he had no other symptoms at that *** and radiological examinations revealed:white blood cell(WBC)counts,10.9×10^(9)/l;neutrophil percentage,84.5%;eosinophil percentage,3.1%;C-reactive protein(CRP),141 mg/l;liver and kidney function,normal;influenza virus,negative;urine and stool tests,normal;and chest computed tomography(CT)findings,*** fever subsided after 1 week of anti-infective treatment with *** tests revealed the following results:WBC,15.0×10^(9)/l;neutrophil percentage,70.0%;eosinophil percentage,16.8%;and CRP,122 mg/*** antimicrobial treatment was then discontinued.

关键词： fever diagnosis admitted

Numerical simulation of microstructure and microporosity morphology in directional solidification of aluminum-copper alloys:Effect of copper content and withdrawal rate

在线全文

学校读者我要写书评

暂无评论

China Foundry 2025年第1期22卷 33-44页

作者： wei Yuan Hai-dong Zhao Xu Shen Chun Zou Yuan liu Qing-yan Xu National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials South China University of TechnologyGuangzhou 510640China Key laboratory for Advanced Materials Processing Technology(Ministry of Education) Tsinghua UniversityBeijing 100084China

Microporosity formed in the solidification process of Al alloys is detrimental to the alloy properties.A two-dimensional cellular automaton(CA)model was developed to simulate the microstructure and microporosity formation in Al-Cu alloys,considering variations in Cu content and solidification *** results indicate that the Cu content primarily influences the growth of *** validate the model,directional solidification experiments were conducted on Al-Cu alloys with varing Cu contents and withdrawal *** experimental results of dendrites and microporosity characteristics agree well with the predictions from the developed model,thus confirming the validity of the *** alloy’s liquidus temperature,dendrite morphology,and hydrogen saturation solubility arising from different Cu contents have significant effects on microporosity *** withdrawal rate primarily affects the nucleation of hydrogen microporosity by altering cooling rates and dendritic growth rates,resulting in different microporosity characteristics.

关键词： microporosity dendrites cellular automaton Al-Cu alloys directional solidification