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Chemical composition evaluation and pyrolysis behavior of biomass tar:Pyrolysis experiment and kinetic studies

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International Journal of Agricultural and Biological Engineering 2024年第3期17卷 230-234页

作者： Weijuan Lan Yunlong Zhou Jiaxin Liu Yingxian Wang dongxue Yin Jiangtao Ji Xin Jin School of Agricultural Equipment Engineering Henan University of Science and TechnologyLuoyang 471003HenanChina

Biomass gasification process generates the residual tar,which in turn exerts some negative influence on biomass gasification *** reduce this harmful influence,an evaluation of the tar properties during the biomass gasification was *** chemical composition and pyrolysis behavior of biomass tar were *** complex chemical composition of the tar,which includes phenol derivatives,naphthalene derivatives,other macromolecular aromatic compounds,furans,and other compounds(carbon number from 7 to 14),was established by gas chromatography-mass spectrometry *** analysis was performed with two heating rates(10℃/min and 20℃/min),and Coats-redfern method was applied to assess the kinetic parameters,i.e.,the activation energy(E)and pre-exponential factor(A)of tar thermochemical *** results showed that the main degradation of tar is a two-step process,including a volatilization step at lower temperatures(d a pyrolysis step at higher temperatures(105℃-380℃).The application of the Coats-redfern method revealed a variation trend of the activation energy during the decomposition of tar in a non-isothermal *** shows that high temperature is more conducive to tar *** adjusting the temperature to control the generation and removal of tar,new approaches are provided for designing and optimizing biomass gasification systems.

关键词： biomass tar chemical components thermogravimetric analysis kinetics

root cause of corrosion failure of tin coating on wire clamp in marine atmosphere

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Journal of Iron and Steel research International 2024年第4期31卷 998-1014页

作者： Zhen Zhong Wang-yan Ly Teng-yuan Liu Yi Xie Yang Yang Zhen-zhu Wang deng-ke Li Xiao-bo Li Tang-qing Wu School of Materials Science and Engineering Xiangtan UniversityXiangtan 411105HunanChina Electric Power research Institute of Guangdong Power Grid Co. Ltd.Guangzhou 510080GuangdongChina Shenyang National L aboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina School of Materials Science and Engineering.University of Science and Technology of China Shenyang 110016LiaoningChina Electric Power research Institute State Grid Hunan Electric Power CompanyChangsha 410007HunanChina School of Mechanical Engineering and Mechanics Xiangtan UniversityXiangtan 411105HunanChina School of Information Science and Engineering Changsha Normal UniversityChangsha 410199HunanChina

The failure cause of a tinned copper wire clamp in marine atmosphere was studied systematically by X-ray photoelectron spectroscopy,scanning electron microscopy with energy dispersive spectroscopy and electrochemical *** main components of the green rust on the surface of the damaged wire clamp are SnO_(2),CuO,Cu_(2)Cl(OH)_(3) and CuCO(OH)_(2).Much of green rust distributes at the platform edge along the axial direction on the crimp connection,and severe corrosion and corrosion pits occur at the platform edge zone along the axial *** enriching Cl-at the marine atmosphere and the existing O_(2) in air collectively enhance the corrosion process of the tin coating and the copper *** element model results show that the residual stress and strain of the tin coating are the largest at the platform edge along the axial direction on the crimp connection,and the corresponding electrode potential of the tin coating at this zone drops *** above results indicate that the residual strain increases the driving force of the corrosion electrochemical reactions and accelerates the corrosion rate and the pit corrosion of the tin coating at this zone.

关键词： Tin coating Marine atmosphere residual strain-Chloride ion Corrosion failure

Tailoring esophageal tumor spheroids on a chip with inverse opal scaffolds for drug screening

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Materials Futures 2024年第3期3卷 168-177页

作者： ruolin Shi Xiangyi Wu Yuanjin Zhao Shegan Gao Gaofeng Liang Clinical Medical College and henan key Laboratory of Microbiome and Esophageal Cancer Prevention and Treatment Henan University of Science and TechnologyLuoyang 471023People’s Republic of China department of rheumatology and Immunology Nanjing Drum Tower HospitalSchool of Biological Science and Medical EngineeringSoutheast UniversityNanjing 210008People’s Republic of China Institute of Organoids on Chips Translational research Henan Academy of SciencesZhengzhou 450003People’s Republic of China

Esophageal cancer(EC)is characterized by high morbidity and mortality,and chemotherapy has become an indispensable means for comprehensive ***,due to the limitation of the effective in vitro disease model,the development of chemotherapeutic agents still faces great *** this paper,we present a novel tumor spheroid on a chip platform based on inverse opal hydrogel scaffolds to screen chemotherapeutic agents for EC *** the microfluidic emulsion approach,the inverse opal hydrogel scaffolds were generated with tunable and organized pores,which could provide spatial confinement for cell ***,the suspended KYSE-70 cells could successfully form uniform cell spheroids on the inverse opal hydrogel *** was demonstrated that the tumor cell spheroids could recapitulate 3d growth patterns in vivo and exhibited higher sensitivity to the chemotherapy agents compared with monolayer ***,by employing the scaffolds into a microfluidics to construct esophageal tumor on a chip,the device could realize high-throughput tumor cell spheroids generation and drug screening,indicating its promising role in chemotherapy drug development.

关键词： tumor on a chip inverse opal microfluidics chemotherapy drug screening esophageal cancer

Integrating Neighborhood Geographic distribution and Social Structure Influence for Social Media User Geolocation

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Computer Modeling in Engineering & Sciences 2024年第9期140卷 2513-2532页

作者： Meng Zhang Xiangyang Luo Ningbo Huang key Laboratory of Cyberspace Situation Awareness of henan province Zhengzhou450001China State key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou450001China

Geolocating social media users aims to discover the real geographical locations of users from their publicly available data,which can support online location-based applications such as disaster alerts and local content *** relationship-based methods represent a classical approach for geolocating social ***,geographically proximate relationships are sparse and challenging to discern within social networks,thereby affecting the accuracy of user *** address this challenge,we propose user geolocation methods that integrate neighborhood geographical distribution and social structure influence(NGSI)to improve geolocation ***,we propose a method for evaluating the homophily of locations based on the k-order neighbor-hood geographic distribution(k-NGd)similarity among *** are notable differences in the distribution of k-NGd similarity between location-proximate and non-location-proximate *** this distinction,we filter out non-location-proximate social relationships to enhance location homophily in the social *** better utilize the location-proximate relationships in social networks,we propose a graph neural network algorithm based on the social structure *** algorithm enables us to perform a weighted aggregation of the information of users’multi-hop neighborhood,thereby mitigating the over-smoothing problem of user features and improving user geolocation *** results on real social media dataset demonstrate that the neighborhood geographical distribution similarity metric can effectively filter out non-location-proximate social ***,compared with 7 existing social relationship-based user positioning methods,our proposed method can achieve multi-granularity user geolocation and improve the accuracy by 4.84%to 13.28%.

关键词： User geolocation social media neighborhood geographic distribution structure influence

Selective recovery of Th(Ⅳ) from radioactive rare earth waste residue by utilizing MoS_(2)-modified ion-absorbed type rare earth tailings

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Journal of rare Earths 2024年第9期42卷 1782-1791,I0005页

作者： Xirong Chen Xinyu Fu Yun Gao Zhiyuan Zeng Bin Huang Xiaoqi Sun Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and TechnologyGanzhou341000China CAS key Laboratory of design and Assembly of Functional Nanostructures Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002China Fujian research Center for rare Earth Engineering Technology Xiamen Institute of Rare Earth MaterialsHaixi InstituteChinese Academy of SciencesXiamen361021China Fujian College University of Chinese Academy of SciencesFuzhou350002China Jiangxi province key Laboratory of Cleaner Production of rare Earths Ganjiang Innovation AcademyChinese Academy of SciencesGanzhouJiangxi341000China

In the process of extracting ion-absorbed rare earth ore(IrEO),the production of radioactive waste is a major environmental *** address this issue,MoS_(2) was used to modify ion-absorbed rare earth tailings(rET) to synthesize a novel MoS_(2)@rET composite material for the effective handling of radioactive waste generated in IrEO separation *** composite material was thoroughly characterized using various analytical techniques,including X-ray diffraction(Xrd),X-ray photoelectron spectroscopy(XPS),thermogravimetry(TG),Fourier-transform infrared(FTIr),scanning electron microscopy(SEM),Brunaue r-Emmett-Teller(BET) and energy dispersive spectroscopy(EdS).By optimizing the operating parameters,the optimal experimental conditions were determined to be pH=3,contact time=60 min,liquid-solid ratio=6 g/L,and initial concentration=150 mg/*** adsorption data fitted well with the pseudo second-order rate *** thermodynamic parameters concerning the adsorption of Th(Ⅳ) were analyzed and *** isotherm model is a more fitting choice for the adsorption process compared to the Freundlich isotherm ***_(2)@rET was used in the acid leachate of IrEO waste residue,achieving the separation of Th and rare earth *** mechanism of Th(Ⅳ) adsorption by MoS_(2)@rET was investigated,revealing that the adsorption process involves electrostatic interactions,chemical bonding,and redox *** above research results indicate that MoS_(2)@rET composite materials have application potential in the sustainable treatment of IrEO radioactive waste.

关键词： rare earths Thorium radioactive waste residue Adsorption Separation

维普期刊数据库

research progresses of nanomaterials as lubricant additives

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Friction 2024年第7期12卷 1347-1391页

作者： Zhengquan JIANG Yankun SUN Bokang LIU Laigui YU Yuping TONG Mingming YAN Zhongzheng YANG Yongxing HAO Linjian SHANGGUAN Shengmao ZHANG Weihua LI School of Materials Science and Engineering North China University of Water Resources and Electric PowerZhengzhou 450045China Institute of Special Friction and Lubricating Materials North China University of Water Resources and Electric PowerZhengzhou 450045China Nanomaterials Engineering research Center Henan UniversityKaifeng 475001China School of Mechanical Engineering North China University of Water Resources and Electric PowerZhengzhou 450045China

Friction and wear are unavoidable in mechanical *** use of lubricants with nano-additives can effectively reduce friction and wear,which is of great significance to saving energy and protecting the *** present,great progress has been made in the scientific research and industrial application of nano-additives for *** paper mainly introduces the types of nano-additives for lubricants(such as carbon nanomaterials,nano-metals,nano-oxides,sulfides,complexes,polymers,etc.),the tribological properties of lubricants with different components of nano-additives,and the lubrication mechanisms of the nano-additives(including tribofilm formation,rolling ball bearing effect,repairing effect,polishing effect,and synergistic effect).It also deals with the dispersion of nano-additives in lubricants and the influences of their particle size and microstructure on the tribological properties of *** review outlines the performance requirements of nano-additives in different lubrication states,discusses the use of nano-additives in challenging working conditions,and identifies various industrial oil nano-additives with reference to the appropriate options in diverse working ***,the existing problems of nano-additives and their application prospects are *** review,hopefully,would help to shed light on the design and synthesis of novel high-performance nano-additives and promote their application in engineering.

关键词： nanomaterials lubricant additive lubrication mechanism research progress

Extraction and bioactivities of the chemical composition from Pleurotus ostreatus:a review

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Journal of Future Foods 2024年第2期4卷 111-118页

作者： Qingchun Zhao Xiaopeng Liu Lili Cui Changyang Ma National r&d Center for Edible Fungus Processing Technology Henan UniversityKaifeng 475004China Functional Food Engineering Technology research Center Kaifeng 475004China Joint International research Laboratory of Food&Medicine resource Function Kaifeng 475004China

Pleurotus ostreatus as an edible mushroom with pharmacological potential,belonging to class basidiomycetes of kingdom Mycota is known to have immense therapeutic *** contains polysaccharides,proteins,sterols,volatile oils and *** has a variety of biological activities,including anti-oxidant,anti-hyperlipidemic,anti-tumor,immunoregulatory and *** paper summarizes the extraction methods,chemical components and biological activities of ***,and find it is good resources to develop medicine and health food.

关键词： Pleurotus ostreatus Extraction methods Chemical components Biological activities

How does Stacking Pressure Affect the Performance of Solid Electrolytes and All-Solid-State Lithium Metal Batteries?

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Energy & Environmental Materials 2024年第4期7卷 93-98页

作者： Junwu Sang Bin Tang Yong Qiu Yongzheng Fang Kecheng Pan Zhen Zhou Interdisciplinary research Center for Sustainable Energy Science and Engineering (IrC4SE2) School of Chemical Engineering Zhengzhou University

All-solid-state lithium metal batteries (ASSLMBs) with solid electrolytes (SEs)have emerged as a promising alternative to liquid electrolyte-based Li-ion batteries due to their higher energy density and ***,since ASSLMBs lack the wetting properties of liquid electrolytes,they require stacking pressure to prevent contact loss between electrodes and SEs.

关键词： critical current density solid electrolyte solid-state lithium metal batteries stacking pressure

A Novel Multi-Attribute decision-Making Method Based on Probabilistic Hesitant Fuzzy Soft Set and Its Application

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Journal of Systems Science and Information 2024年第2期12卷 294-308页

作者： Zhenchun ZANG Jielu LI Meng WEI College of Computer and Information Engineering Henan University of Economics and LawZhengzhou 450046China

The probabilistic hesitant fuzzy multi-attribute group decision-making method introduces probability and hesitation into decision-making problems at the same time,which can improve the reliability and accuracy of decision-making results,and has become a research hotspots in recent ***,there are still many problems,such as overly complex calculations and difficulty in obtaining probability *** on these,the paper proposes a multi-attribute group decision-making model based on probability hesitant fuzzy soft ***,the definition of probabilistic hesitant fuzzy soft set is ***,based on soft set theory and probabilistic hesitant fuzzy set,the similarity measure of probabilistic hesitant fuzzy soft set is proposed,and the two measures are further ***,it is applied to the construction of multi-attribute group decision-making model,and the effectiveness and rationality of the model are verified by an *** example shows that the new similarity calculation formula and algorithm model in this paper have higher accuracy,and the calculation process is more simple,it provides a feasible method for multi-attribute group decision making problems.

关键词： probabilistic hesitant fuzzy soft sets similarity multi-attribute group decision-making model

维普期刊数据库