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Study on a conical bearing f.r acceleration-sensitive equipment

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Earthquake Engineering and Engineering Vibration 2024年第1期23卷 103-128页

作者： Pang Hui Xu wen Dai Junwu Jiang tao Key Laboratory of.Earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake AdministrationHarbin 150080China Key Laboratory of.Earthquake Disaster Mitigation Ministry of Emergency ManagementHarbin 150080China School of.Civil Engineering and Transportation Beihua UniversityJilin 132013China

Seismic isolation ef.ectively reduces seismic demands on building structures by isolating the superstructure f.om ground vibrations during ***,isolation strategies give less attention to acceleration-sensitive systems or ***,as the isolation layer’s displacement grows,the stif.ness and f.equency of.traditional rolling and sliding isolation bearings increases,potentially causing self.centering and resonance *** a result,a new conical pendulum bearing has been selected f.r acceleration-sensitive equipment to increase self.centering capacity,and additional viscous dampers are incorporated to enhance system ***,the theoretical f.rmula f.r conical pendulum bearings is supplied to analyze the device’s dynamic parameters,and shake table experiments are used to determine the proposed device’s isolation ef.iciency under various *** to the test results,the newly proposed devices have remarkable isolation perf.rmance in terms of.minimizing both acceleration and displacement ***,a numerical model of.the isolation system is provided f.r f.rther research,and the accuracy is demonstrated by the af.rementioned experiments.

关键词： seismic isolation acceleration-sensitive equipment the conical pendulum bearing shake table tests isolation perf.rmance,numerical model

In situ embedded bismuth nanoparticles among highly porous carbon f.bers f.r ef.icient carbon dioxide reduction

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Rare Metals 2024年第9期43卷 4312-4320页

作者： Wei-Jian Guo Ao Zhou wen-wen Cai Jin-tao Zhang Key Laboratory f.r Colloid and Interf.ce Chemistry(Ministry of.Education) School of Chemistry and Chemical EngineeringShandong UniversityJinan 250100China

Electrocatalysis provides an optimal approach f.r the conversion of.carbon dioxide(CO_(2))into high-value chemicals,thereby presenting a promising avenue toward achieve carbon ***,addressing the selectivity and stability challenges of.metal catalysts in electrolytic reduction remains a daunting *** this study,the electrospinning method is employed to f.bricate porous carbon nanof.bers loaded with bismuth nanoparticles with the help of.in situ *** porous carbon nanof.bers as conductive support would f.cilitate the dispersion of.bismuth active sites while inhibiting their aggregation and promoting the mass transf.r,thus enhancing their electrocatalytic activity and ***,nitrogen doping induces electron delocalization in bismuth atoms through metal-support interactions,thus enabling ef.icient adsorption of.intermediates f.r improving selectivity based on the theoretical ***,Bi@PCNf.500 exhibits the exceptional selectivity and stability across a wide range of.potential ***,its f.radaic ef.iciency(f.)of.f.rmate reaches 92.7%in H-cell and94.9%in f.ow cell,respectively,with good electrocatalytic *** in situ characterization and theoretical calculations elucidate the plausible reaction mechanism to obtain basic rules f.r designing ef.icient electrocatalyst.

关键词： Porous carbon nanof.ber N-doping Electron delocalization Carbon dioxide reduction

Def.rmation mechanism and hydrocarbon signif.cance of.Eocene organic-rich f.ne-grained sof. sediments in the Leijia Region,Liaohe Depression

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f.ontiers of.Earth Science 2024年第1期18卷 83-97页

作者： Yijie wen Jianguo ZHANG Shu tao Chenyu CAI School of.Energy Resources China University of Geosciences(Beijing)Beijing 100083China Key Laboratory of.Strategy Evaluation f.r Shale Gas(Ministry of.Land Resources) China University of Geosciences(Beijing)Beijing 100083China School of.f.reign Languages China University of Geosciences(Beijing)Beijing 100083China

The def.rmation structure of.sof. sediments has always been a research hotspot,which is of.great signif.cance f.r analyzing the tectonic and sedimentary evolution background of.a basin,as well as the physical properties of.*** studies have reported that a large number of.sof. sediment def.rmation structures are developed in the western part of.Liaohe *** this study,through core observation and thin section identif.cation,various types of.def.rmation structures are identif.ed in the core samples which are collected f.om the upper Es4 in the Leijia region,western sag of.Liaohe depression,such as liquef.ed dikes,liquef.ed breccia,convoluted laminae,annular bedding,synsedimentary f.ults,vein structures,*** on the characteristics of.core structure,single well prof.le and continuous well prof.le,combined with the regional background,this study clarif.es that the def.rmation structure of.sof. sediments in the study area is mainly caused by seismic *** is f.und that the permeability and porosity of.def.rmation layers in the study area are higher than those of.the undef.rmation layers,which proves that the def.rmation structure of.sof. sediments has a good ef.ect on improving the physical properties of.reservoirs.

关键词： sof. sediment def.rmation structure Liaohe depression organic-rich f.ne-grained sof. sediments hydrocarbon signif.cance

Solvothermal synthesis and adsorption perf.rmance of.layered boehmite using aluminum chloride and high-alumina f.y ash

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Chinese Journal of.Chemical Engineering 2024年第6期70卷 280-290页

作者： Jing wen Ruirui Yuan tao Jiang Tangxia Yu Yuf.n Zhang School of.Metallurgy Northeastern UniversityShenyang 110819China Key Laboratory f.r Ecological Metallurgy of.Multimetallic Mineral(Ministry of.Education) Northeastern UniversityShenyang 110819China Liaoning Key Laboratory f.r Metallurgical Sensor and Technology Shenyang 110819China

High alumina f.y ash(f.HAl)is a kind of.bulk solid waste unique to China,whose availability of.high-value aluminum and the threat to the environment makes its high-value utilization *** this work,the alumina containing leaching solution obtained f.om Na_(2)CO_(3) roasting and HCl leaching of.f.HAl was used as the mother liquor to prepare layered boehmite in *** preparation process with AlCl_(3) as the raw material was also *** f.rmation process and mechanism of.boehmite,the choice of.solvent,along with the adsorption capability of.Congo red were analyzed by X-ray dif.raction,scanning electron microscopy,f.urier transf.rm inf.ared spectroscopy,Brunauer-Emmett-Teller method and adsorption *** showed that during the preparation of.layered boehmite,the precursor Al(OH)_(3) f.om the reaction of.Al^(3+) and OH-is transf.rmed into boehmiteγ-*** existence of.ethanol is benef.cial to regulate and promote the growth of.boehmite crystal *** water and ethanol are mixed with a volume ratio of.2:1 and used as the solvent,the maximum specif.c surf.ce area of.the boehmite is obtained at 135.7 m^(2)·g^(-1),and 99.16%of.Congo red can be absorbed af.er 10 min when AlCl3 is used as a raw *** purif.ed leaching solution is used as the mother liquid,the crystallinity of.boehmite decreases slightly when the pH value decreases f.om 12.5 to *** pH is 11,the removal ef.iciency of.Congo red reaches a maximum of.72.25%.This process not only achieves the extraction of.aluminum and high-value utilization of.f.HAl but also provides a thought to prepare layered boehmite with adsorption properties.

关键词： High-alumina f.y ash Layered boehmite In-situ preparation Solvothermal synthesis Adsorption High-value utilization

A review of.microwave-metal discharge interaction:Mechanism,regulation,and application f.r synthesis of.nanomaterials

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Nano Research 2024年第10期17卷 9225-9254页

作者： Yixuan Xie Ruiqian Shi Benwei f. Chengyi Song wen Shang Peng tao tao Deng State Key Laboratory of.Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China National Engineering Research Center of.Special Equipment and Power System f.r Ship and Marine Engineering Shanghai 200030China

Placing metals within microwave ovens has been generally viewed as a dangerous practice because of.occurrence of.violent discharge,but in recent years such discharge phenomenon has attracted increasing attention and has enabled a variety of.exciting *** this work,we provide a comprehensive review of.f.ndamental understanding of.microwave-metal discharge interaction and its state-of.the-art application f.r nanomaterials *** introduce the microscopic interaction between dif.erent categories of.materials and the electric and magnetic f.eld of.*** microwave-metal interaction,we highlight its size-dependence and point out the inf.uence of.the oxide layer on the surf.ce of.*** discuss the required conditions f.r occurrence of.discharge,microscopic f.rmation mechanism,and characteristic f.atures of.microwave-metal discharge *** analyzing the inf.uence f.om the microwave input,discharging metals,and surrounding discharging media,we discuss the strategy f.r systematical regulation of.the discharge *** describe the applications of.the microwave-metal discharge f.r f.cile synthesis of.various f.nctional nanomaterials including core-shell carbon/metal,metal oxides,metal chalcogenides,intermetallic compounds,metallic nanoparticles and metallic compounds,and organic ***,the challenges in precise characterization and dynamic regulation of.the discharge process as well as exciting application opportunities are discussed.

关键词： microwave-metal interaction discharge microwave heating skin depth nanomaterial synthesis

Carbon ef.iciency modeling and optimization of.solar-powered cellular networks

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Science China(Inf.rmation Sciences) 2024年第5期67卷 228-243页

作者： Yuxi ZHAO Xiaohu GE wen YAN tao HAN Yi ZHONG School of.Electronic Inf.rmation and Communications Huazhong University of Science and Technology Huawei Technology Co. Ltd.

As wireless communication traf.ic experiences rapid growth, the carbon emissions caused by the communication industry are also on the rise. To achieve “carbon neutrality”, researchers are considering the use of.renewable energy sources to power cellular networks, thereby reducing carbon emissions. However, a challenge arises when using renewable energy, specif.cally owing to the unpredictable nature of.both the energy consumption of.the cellular network and the power generation f.om renewable sources. This inconsistency results in low renewable energy utilization and reduced carbon ef.iciency. Herein, we construct a carbon ef.iciency model of.solar-powered cellular networks using practical data f.om solar radiation. We propose a mechanism that alternately optimizes the perf.rmance of.the renewable energy network and the cellular network. This approach is based on convex optimization theory and the Dinkelback algorithm, and it leads to the design of.a carbon ef.iciency optimization algorithm. This algorithm aims to improve the carbon ef.iciency of.cellular networks and reduce their carbon emissions. Simulation results demonstrate that our optimization scheme yields a maximum improvement of.2.56 × 108bps/g in the carbon ef.iciency of.the cellular network as compared to conventional power allocation schemes such as the traditional water f.lling method and heuristic energy sharing and charge/discharge algorithms.

关键词： cellular networks renewable energy carbon ef.iciency convex optimization theory dinkelbach

Valorization of.carbon dioxide with alcohols

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Chinese Chemical Letters 2024年第7期35卷 54-58页

作者： Daheng wen Weiwei f.ng Yongmei Liu tao Tu Shanghai Key Laboratory of.Molecular Catalysis and Innovative Materials Department of ChemistryFudan UniversityShanghai 200438China Jiangsu Co-Innovation Center of.Ef.icient Processing and Utilization of.f.rest Resources International Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjing 210037China State Key Laboratory of.Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

Utilizing CO_(2)f.r the production of.bulky and valuable chemicals presents an attractive solution to address environmental and f.ssil energy *** the various approaches,direct carboxylation of.alcohols with CO_(2)stands out as an eco-f.iendly process capable of.ef.iciently producing carboxylic acids in a sustainable ***,the high dissociation energy of.the C–O bond poses a signif.cant challenge in this *** the past f.w decades,several strategies have been developed to activate alcohols and establish ef.icient catalytic systems f.r carboxylation with CO_(2).Nevertheless,the sporadic nature of.reported approaches makes it dif.icult to determine the most ef.ective *** perspective aims to provide an overview of.the current state-of.the-art catalytic protocols f.r carboxylating alcohols with CO_(2),encompassing esterif.cation,halogenation,and photocatalysis,while considering their respective advantages and *** aim to discern the most promising avenues f.r f.ture development in this *** insights presented in this perspective will contribute to the advancement of.ef.icient and sustainable carboxylation methods using CO_(2),leading to the production of.valuable chemicals in f.ture.

关键词： Carboxylation Carbon dioxide Alcohol Carboxylic acid Transition metal catalysis

Visualization analysis of.research hotspots and trends on gastrointestinal tumor organoids

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World Journal of.Gastrointestinal Oncology 2024年第6期16卷 2826-2841页

作者： Gang Wang tao Liu wen-Ting He School of.Basic Medical Sciences Lanzhou UniversityLanzhou 730000Gansu ProvinceChina Digestive System Tumor Prevention and Treatment and Translational Medicine Engineering Innovation Center of.Lanzhou University Lanzhou UniversityLanzhou 730000Gansu ProvinceChina Digestive System Tumor Translational Medicine Engineering Research Center of.Gansu Province Lanzhou UniversityLanzhou 730000Gansu ProvinceChina The Second Hospital&Clinical Medical School Lanzhou UniversityLanzhou 730030Gansu ProvinceChina

BACKGROUND Gastrointestinal tumor organoids serve as an ef.ective model f.r simulating cancer in vitro and have been applied in basic biology and preclinical *** over a decade of.development and increasing research achievements in this f.eld,a systematic and comprehensive analysis of.the research hotspots and f.ture trends is *** To address this problem by employing bibliometric tools to explore the publication years,countries/regions,institutions,journals,authors,keywords,and ref.rences in this *** The literature was collected f.om Web of.Science ***-6.2R4,a widely used bibliometric analysis sof.ware package,was used f.r institutional analysis and ref.rence burst *** 1.6.19 was used f.r journal cocitation analysis,author co-authorship and co-citation ***‘online platf.rm f.r bibliometric analysis(https://***/app)’was used to assess the total number of.publications and the cooperation relationships between ***,we employed the bibliometric R sof.ware package(version R.4.3.1)in R-studio,f.r a comprehensive scientif.c analysis of.the *** Our analysis included a total of.1466 publications,revealing a signif.cant yearly increase in articles on the study of.gastrointestinal tumor *** United States(n=393)and Helmholtz Association(n=93)have emerged as the leading countries and institutions,respectively,in this f.eld,with Hans Clevers and Toshiro Sato being the most contributing *** most inf.uential journal in this f.eld is *** most impactf.l ref.rence is"Long term expansion of.epithelial organs f.om human colon,adenoma,adenocarcinoma,and Barrett's epithelium".Keywords analysis and citation burst analysis indicate that precision medicine,disease modeling,drug development and screening,and regenerative medicine are the most cutting-edge *** f.cal points were f.rther detailed based on the *** This bibl

关键词： Gastrointestinal tumor organoids Bibliometric analysis Drug development and screening Model CiteSpace

ALKBH5 suppresses autophagic f.ux via N6-methyladenosine demethylation of.ZKSCAN3 mRNA in acute pancreatitis

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World Journal of.Gastroenterology 2024年第12期30卷 1764-1776页

作者： tao Zhang Shuai Zhu Geng-wen Huang Department of.General Surgery Xiangya HospitalCentral South UniversityChangsha 410005HunanChina. National Clinical Research Center f.r Geriatric Disorders Xiangya HospitalCentral South UniversityChangsha 410005HunanChina.

BACKGROUND Increasing evidence has demonstrated that N6-methyladenosine(m6A)RNA modif.cation plays an essential role in a wide range of.pathological *** autophagy is a critical hallmark of.acute pancreatitis(AP).AIM To explore the role of.the m6A modif.cation of.ZKSCAN3 in the regulation of.autophagy in *** The AP mouse cell model was established by cerulein-treated mouse pancreatic acinar cells(MPC-83),and the results were conf.rmed by the levels of.amylase and inf.ammatory *** activity was evaluated by specif.c identif.cation of.the autophagy-related microstructure and the expression of.autophagy-related ***3 and ALKBH5 were knocked down to study the f.nction in AP.A m6A RNA binding protein immunoprecipitation assay was used to study how the m6A modif.cation of.ZKSCAN3 mRNA is regulated by *** The increased expression of.amylase and inf.ammatory f.ctors in the supernatant and the accumulation of.autophagic vacuoles verif.ed that the AP mouse cell model was *** downregulation of.LAMP2 and upregulation of.LC3-II/I and SQSTM1 demonstrated that autophagy was impaired in *** expression of.ZKSCAN3 was upregulated in *** of.ZKSCAN3 increased the expression of.LAMP2 and decreased the expression of.the inf.ammatory f.ctors,LC3-II/I and ***,ALKBH5 was upregulated in *** of.ALKBH5 downregulated ZKSCAN3 expression and restored decreased autophagic f.ux in ***,the bioinf.rmatic analysis revealed 23 potential m6A modif.cation sites on ZKSCAN3 *** m6A modif.cation of.ZKSCAN3 mRNA was signif.cantly decreased in *** of.ALKBH5 increased the modif.cation of.ZKSCAN3 mRNA,which conf.rmed that ALKBH5 upregulated ZKSCAN3 expression in a m6A-dependent *** ALKBH5 inhibits autophagic f.ux through m6A demethylation of.ZKSCAN3 mRNA in AP,thereby aggravating the severity of.the disease.

关键词： Acute pancreatitis Autophagy ZKSCAN3 N6-methyladenosine ALKBH5