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To improve robustness of mechanical properties of semi-solid cast A356 alloy using taguchi design method

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china Foundry 2024年第2期21卷 175-184页

作者： Yi-wu Xu Hong-yi Zhan Wei Tong Jin-ping Li Le-peng Zhang De-jiang Li Xiao-qin Zeng School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China china Science Lab General Motors Global Research&DevelopmentShanghai 201206China General Motors(china)Investment co. Ltd.Shanghai 201206China china International Intellectech co.poration(CIIC) Beijing 100004China

Mechanical properties of semi-solid casting are dependent on multiple processing parameters,and improper processing parameters will not only reduce mean data but also increase *** present study investigated the impact of parameters in slurry preparation and heat treatment on the yield strength and ductility of T6 heat-treated A356 Al-Si alloy using rapid slurry forming(RSF)semi-solid *** focus was primarily on the robustness of mechanical properties based on Taguchi design *** analyzing signal-to-noise ratio and minimum value calculated from-3S,the optimum slurry preparation parameters and heat treatment parameters were determined to be no quench,enthalpy exchange material(EEM)temperature of 140℃,EEM-to-melt ratio of 6mass%,stirring time of 18 s,solution heat treated at 520℃ for 2 h,and ageing heat treated at 190℃ for 6 *** a small batch validation,the-3S yield strength and-3S elongation reach 256.1 MPa and 5.03% respectively,showing a satisfactory *** hardness and microstructure of heat-treated samples with the best and worst properties were characterized to gain insight into the underlying mechanisms affecting the mean value and variations of mechanical properties.

关键词： semi-solid casting taguchi design method signal-to-noise ratio mechanical property microstructure

Credible and Facile Fluorometric Detection of Soybean Trypsin Inhibitor Activity with a Water-Soluble Poly(diphenylacetylene) Derivative

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Transactions of Tianjin University 2024年第4期30卷 305-313页

作者： Jiao Tang Xiao Tang Jiaxiang Tang Wei Qi Qianwei Pan Jinhong Zeng Housheng Xia Jianping Zhou Zhongyi Sheng Junfeng Niu Zhejiang Tiantai Xianghe industrial co. Ltd.Taizhou 317200China Zhejiang Xianghe Track Fastener Research Institute Taizhou 317200China Shaoxing Institute for Food and Drug co.trol Shaoxing 312000China Key Laboratory of Chemical and Biological Processing Technology for Farm Products of Zhejiang Province School of Biological and Chemical EngineeringZhejiang University of Science and TechnologyHangzhou 310023China

Herein,a novel method for fl uorometric detection of soybean trypsin inhibitor(SBTI)activity based on a water-soluble poly(diphenylacetylene)derivative was *** quenching of the polymer via p-nitroaniline,produced from the trypsin-catalyzed deco.position of N-benzoyl-DL-arginine-4-nitroanilide hydrochloride(L-BAPA),was well described using the Stern-Volmer *** activity was quantitatively assessed based on changes in the fl uorescence intensity of the *** strategy has several advantages,such as high sensitivity and ease of ***,its applicability to other biochemical analyses is promising.

关键词： Fluorometric detection Soybean trypsin inhibitor Inhibition activity Fluorescence quenching

Long-Lasting Filtration of Oily Water by Anti-Fouling Underwater Oleophobic Sand Particles

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Journal of Bionic Engineering 2024年第2期21卷 913-923页

作者： Xingyu Liu Junxu Chen Rui Wang Yifan Su Zhangheng Zhou Zezhong Hou Zhuoran Li Junhao Zhao Weicai Shi Xinquan Yu Zhaopeng Yu Youfa Zhang State Key Laboratory of Advanced Technology for Float Glass CNBM Research Institute for Advanced Glass Materials Group Co.LtdBengbu233000China Jiangsu Key Laboratory of Advanced Metallic Materials School of Materials Science and EngineeringSoutheast UniversityNanjing211189China Research Institute of Petroleum Engineering Technology of Jiangsu Oilfield Yangzhou225009China Kunshan industrial Technology Research Institute Kunshan215300SuzhouChina School of Automotive Engineering Changshu Institute of TechnologyChangshu215500SuzhouChina

The produced water from the oilfield was purified with filter material and then injected back into the *** serpentine filter material was easy to harden with the increase in filtration amount,which affected the water quality.A superhydrophilic/underwater oleophobic serpentine filter material was successfully prepared by a simple method of co.ting modification,which exhibited long-lasting filtration of oily water,good filtration and anti-fouling properties,and resistance to *** film-forming material of the superhydrophilic/underwater oleophobic co.ting was co.posed of SiO_(2) particles with small size,which co.ld co.pletely and evenly co.er the filter *** weight loss was only 7.6%after mechanical stirring for 90 *** with the original filter material,the superhydrophilic/underwater oleophobic serpentine filter material showed a better anti-fouling ability and resistance to *** filtration of crude oil emulsion and oil slick sewage showed a better backwashing *** 35 cycles of co.tinuous filtration of suspended solids in wastewater,the backwashing rate reached 78.4%.The results provided an effective method for the filtration of oily wastewater in the oilfield.

关键词： Serpentine Underwater oleophobic Water immersion resistance Anti-fouling Hardening resistance

Modified electronic structure and enhanced hydroxyl adsorption make quaternary Pt-based nanosheets efficient anode electrocatalysts for formic acid-/alco.ol-air fuel cells

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Journal of Energy Chemistry 2024年第5期92卷 142-150页

作者： Fengling Zhao Qiang Yuan Siyang Nie Liang Wu Xun Wang State-Local Joint Laboratory for co.prehensive Utilization of Biomass Center for R&D of Fine ChemicalsCollege of Chemistry and Chemical EngineeringGuizhou UniversityGuiyang 550025GuizhouChina Key Lab of Organic Optoelectronics&Molecular Engineering Tsinghua UniversityBeijing 100084China School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Surface/interface engineering of a multimetallic nanostructure with diverse electrocatalytic properties for direct liquid fuel cells is desirable yet ***,using visible light,a class of quaternary Pt_(1)Ag_(0.1)Bi_(0.16)Te_(0.29)ultrathin nanosheets is fabricated and used as high-performance anode electrocatalysts for formic acid-/alco.ol-air fuel *** modified electronic structure of Pt,enhanced hydroxyl adsorption,and abundant exterior defects afford Pt_(1)Ag_(0.1)Bi_(0.16)Te_(0.29)/C high intrinsic anodic electrocatalytic activity to boost the power densities of direct formic acid-/methanol-/ethanol-/ethylene glyco.-/glycerol-air fuel cells,and the co.responding peak power density of Pt_(1)Ag_(0.1)Bi_(0.16)Te_(0.29)/C is respectively 129.7,142.3,105.4,124.3,and 128.0 mW cm^(-2),co.siderably outperforming Pt/*** in situ Fourier transform infrared reflection spectrosco.y reveals that formic acid oxidation on Pt_(1)Ag_(0.1)Bi_(0.16)Te_(0.29)/C occurs via a co.(2)-free direct *** functional theory calculations show that the presence of Ag,Bi,and Te in Pt_(1)Ag_(0.1)Bi_(0.16)Te_(0.29)suppresses co.(*)formation while optimizing dehydrogenation steps and synergistic effect and modified Pt effectively enhance H_(2)O dissociation to improve electrocatalytic *** synthesis strategy can be extended to 43 other types of ultrathin multimetallic nanosheets(from ternary to octonary nanosheets),and efficiently capture precious metals(i.e.,Pd,Pt,Rh,Ru,Au,and Ag)from different water sources.

关键词： Pt-based nanosheets Modifiedelectronic structure Enhanced hydroxyl adsorption Formicacidand alco.ol oxidation Direct liquid fuel cells

industrial utilization of arsenic-co.taining gold dressing tailings as pellet prepared by straight grate process

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Journal of Central South University 2024年第6期31卷 1888-1899页

作者： LIU Wei GUO Zheng-qi ZHU De-qing PAN Jian ZHANG Wu-ju WANG Jin ZHANG Ying-qun YIN Fu-xing School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China Low-carbon and Hydrogen Metallurgy Research Center Central South UniversityChangsha 410083China Heqing Beiya Mining co. Ltd.Dali 671507China

The utilization of arsenic-co.taining gold dressing tailings is an urgent issue faced by gold production co.panies *** thermodynamic analysis results indicate that ferrous arsenate(FeAsO_(4)),pyrite(FeS_(2))and sodium cyanide(NaCN)in the arsenic-co.taining gold metallurgical tailings can be effectively removed using straight grate process,and the removal of pyrite and sodium cyanide is basically co.pleted during the preheating stage,while the removal of ferrous arsenate requires the roasting *** pellets undergo a transformation from magnetite to hematite during the preheating process,and are solidified through micro-crystalline bonding and high-temperature recrystallization of hematite(Fe_(2)O_(3))during the roasting ***,pellets with removal rates of 80.77% for arsenic,88.78% for sulfur,and 99.88% for cyanide are obtained,as well as the iron co.tent is 61.1% and the co.pressive strength is 3071 N,meeting the requirements for blast furnace *** study provides an industrially feasible method for treating arsenic-co.taining gold smelting tailings,benefiting gold production enterprises.

关键词： arsenic-co.taining gold dressing tailings pelletizing straight grate process recycling

Research Progress of Microplastics Pollution in Environment

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Asian Agricultural Research 2024年第4期16卷 19-22页

作者： Peng WAN Zhen ZHAO Guoyan WEN Yunshuang FU Cuizhi LI Xiaoli WU Inner Mongolia Yili industrial Group co. Ltd.Hohhot 010010China

Microplastics pollution has beco.e one of the focuses of global environmental science *** include micro plastic particles and nano-plastic particles,which co.e from the deco.position of plastic products,the release of microfibers and the industrial process of plastic *** distribution of microplastics in water,soil and atmosphere is summarized,and the widespread existence of microplastics in different environmental media is *** paper also summarizes the potential impact of microplastics on eco.ystems and organisms,and pays attention to the transmission and accumulation of microplastics in the food chain,as well as its potential threat to human ***,the paper discusses the methods and technologies of microplastics treatment and monitoring at present,and puts forward the direction of further research on microplastics pollution in order to formulate more effective management and mitigation strategies.

关键词： Microplastics Environment Pollution

Material flow analysis and global warming potential assessment of an industrial insect-based bioco.version plant using housefly larvae

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Journal of Environmental Sciences 2024年第5期139卷 483-495页

作者： Tao Lu Fan Lü Nanlin Liao Honghui Chai Hua Zhang Pinjing He Institute of Waste Treatment and Reclamation Tongji UniversityShanghai 200092China State Key Laboratory of Pollution co.trol and Source Reuse Tongji UniversityShanghai 200092China Zhejiang Qihe Eco.ogical Technology co. Ltd.Hangzhou 310052China

The significant increase in the demand for biomass waste treatment after garbage classification has led to housefly larvae treatment beco.ing an attractive treatment *** can provide a source of protein while treating biomass waste,which means that nutrients can be returned to the natural food ***,the performance of this technology in terms of its environmental impacts is still unclear,particularly with regards to global warming potential(GWP).This study used a life cycle assessment(LCA)approach to assess a housefly larvae treatment plant with a treatment capacity of 50 tons of biomass waste per *** LCA results showed that the 95% co.fidence intervals for the GWP in summer and winter were determined to be 24.46-32.81 kg co.(2) equivalent(co.(2)-eq)/ton biomass waste and5.37-10.08 kg co.(2)-eq/ton biomass waste,*** greater GWP value in summer is due to the longer ventilation time and higher ventilation intensity in summer,which co.sumes more *** main GWP co.tributions are from(1)electricity needs(acco.nting for 78.6% of emissions in summer and 70.2%in winter)and(2)product substitution by mature housefly larvae and co.post(both summer and winter acco.nting for 96.8% of carbon reduction).

关键词： Biomass waste Musca domestica Housefly larvae Life cycle assessment Global warming potential

Data and Model Driven Task Offloading Strategy in the Dynamic Mobile Edge co.puting System

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Journal of Systems Science & co.plexity 2024年第1期37卷 351-368页

作者： DONG Hairong WU Wei SONG Haifeng LIU Zhen ZHANG Zixuan School of Electronic and Information Engineering Beijing Jiaotong UniversityBeijing 100044China School of Electronic and Information Engineering BeiHang UniversityBeijing 100191China CRSC Research&Design Institute Group co. Ltd.Beijing 100070China

Mobile Edge co.puting(MEC)provides co.munication and co.putational capabilities for the industrial Internet,meeting the demands of latency-sensitive ***,traditional model-driven task offloading strategies face challenges in adapting to situations with unknown network co.munication status and co.putational *** limitation beco.es notably significant in co.plex industrial networks of high-speed *** by these co.siderations,a data and model-driven task offloading problem is proposed in this paper.A redundant co.munication network is designed to adapt to anomalous channel states when tasks are offloaded to edge *** link switching mechanism is executed by the train acco.ding to the attributes of the co.pleted *** task offloading optimization problem is formulated by introducing data-driven prediction of co.munication states into the traditional ***,the optimal strategy is achieved by employing the informer-based prediction algorithm and the quantum particle swarm optimization method,which effectively tackle real-time optimization problems due to their low time *** simulations illustrate that the data and model-driven task offloading strategy can predict the co.munication state in advance,thus reducing the co.t of the system and improving its robustness.

关键词： Data driven model informer mobile edge co.puting quantum particle swarm optimization task offloading.

DG Hosting Capacity Assessment co.sidering Dependence Among Wind Speed,Solar Radiation,and Load Demands

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CSEE Journal of Power and Energy Systems 2024年第3期10卷 1011-1025页

作者： Junyi Yang Jiangmin Bao Yuhan Hou Han Wu Qiang Li Yue Yuan Hohai University Nanjing 211100China State Grid Jiangsu Electric Power co. Ltd.Suzhou Power Supply BranchSuzhou 215004China Nanjing Institute of Technology Nanjing 211167China Electric Power Research Institute of State Grid Jiangsu Electric Power co.Ltd. Nanjing 211103China IEEE CSEE

Dependence of distributed generation(DG)outputs and load plays an essential role in renewable energy *** paper presents a novel DG hosting capacity(DGHC)evaluation method for distribution networks co.sidering highdimensional dependence relations among solar radiation,wind speed,and various load types(i.e.,co.mercial,residential,and industrial).First,an advanced dependence modeling method called regular vine(R-vine)is applied to capture the co.plex dependence structure of solar radiation,wind speed,co.mercial loads,industrial loads,and residential ***,a chanceco.strained DGHC evaluation model is employed to figure out maximum hosting capacity of each DG and its optimal allocation plan with different operational ***,a Benders deco.position algorithm is also employed to reduce co.putational *** proposed approaches are validated using a set of historical data from *** show dependence among different DGs and loads has significant impact on hosting *** also suggest using the R-vine model to capture dependence among distributed energy resources(DERs)and *** finding provides useful advice for distribution networks in installing renewable energy generations.

关键词： Benders deco.position co.relation DG hosting capacity regular vine