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Effect of V on high-temperature mechanical properties of Al-5Cu-1.5Ni alloy

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Journal of Iron and Steel Research International 2024年第7期31卷 1792-1810页

作者： Jun-ge Cui Yong-bin Chen Xiang-zhou Fu hai-long Yang Han-zhang Wang An-min Li Li-wen Pan School of Resources Environment and MaterialsGuangxi UniversityNanning 530004GuangxiChina State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures Nanning 530004GuangxiChina Guangxi Higher Education Key Laboratory of Advanced Materials Nanning 530004GuangxiChina

The effects of V on microstructure,room temperature,and high-temperature(350℃)mechanical properties of Al-5Cu-1.5Ni alloy were *** results show that Al-5Cu-1.5Ni-xV alloys mainly compriseα-Al,Al_(2)Cu,Al_(3)(Ni,Cu)_(2),Al_(3)Ni,Al7Cu4Ni,and Al_(10)V *** addition of V can signally refineα-Al dendritic structure,which improves the mechanical properties of the as-cast alloys at room and high *** T6 heat treatment(540℃/12 h/WC+170℃/8 h/AC),α-Al,network skeleton structure Al_(3)(Ni,Cu)_(2),and Al_(10)V phases all show coarsening,while the fine nano-θ'-Al_(2)Cu precipitated from the matrix and dispersed *** introduction of V promotes the quantity of precipitatedθ'-Al_(2)Cu *** ultimate tensile strength of the heat-treated alloys at room and high temperatures is greatly improved compared to that of the as-cast *** highest high-temperature ultimate tensile strength of the alloys with V is 111.8 MPa,21.5%higher than that of the base *** analysis shows that the improvement of high-temperature mechanical properties after heat treatment is mainly due to the introduction of V,increasing the precipitated quantity of nano-θ'-Al_(2)Cu particles and improving its thermal *** dispersion strengthening effect ofθ'-Al_(2)Cu particles exceeds the weakening effect of other adverse microstructures on the mechanical properties.

关键词： Al-Cu-Ni-V alloy θ'-Al_(2)Cu phase Heat treatment Microstructure Mechanical property

Prediction of Disc Cutter Life During Shield Tunneling with AI via the Incorporation of a Genetic Algorithm into a GMDH-Type Neural Network

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Engineering 2021年第2期7卷 238-251页

作者： Khalid Elbaz Shui-Long Shen Annan Zhou Zhen-Yu Yin hai-min Lyu Department of Civil and Environmental Engineering College of EngineeringShantou UniversityShantou 515063China Key Laboratory of Intelligence Manufacturing Technology Ministry of EducationShantou UniversityShantou 515063China Discipline of Civil and Infrastructure School of EngineeringRoyal Melbourne Institute of TechnologyMelbourneVIC 3000Australia Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong KongChina State Key Laboratory of Internet of Things for Smart City University of MacaoMacaoChina

Disc cutter consumption is a critical problem that influences work performance during shield tunneling processes and directly affects the cutter change *** study proposes a new model to estimate the disc cutter life(Hf)by integrating a group method of data handling(GMDH)-type neural network(NN)with a genetic algorithm(GA).The efficiency and effectiveness of the GMDH network structure are optimized by the GA,which enables each neuron to search for its optimum connections set from the previous *** the proposed model,monitoring data including the shield performance database,disc cutter consumption,geological conditions,and operational parameters can be *** verify the performance of the proposed model,a case study in China is presented and a database is adopted to illustrate the excellence of the hybrid *** results indicate that the hybrid model predicts disc cutter life with high *** sensitivity analysis reveals that the penetration rate(PR)has a significant influence on disc cutter *** results of this study can be beneficial in both the planning and construction stages of shield tunneling.

关键词： Disc cutter life Shield tunneling Operational parameters GMDH-GA

Comparison of biliary protein spectrum in gallstone patients with obesity and those with normal body weight

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Hepatobiliary & Pancreatic Diseases International 2024年第4期23卷 385-392页

作者： min-Zhi Chen Ping Xie Xiao-Chang Wu Zhen-Hua Tan hai Qian Zhi-Hong Ma Xing Yao Department of Hepatopancreatobiliary Surgery Huzhou Central HospitalAffiliated Huzhou HospitalZhejiang University School of MedicineHuzhou 313000China Huzhou Key Laboratory of Molecular Medicine Huzhou Central HospitalAffiliated Huzhou HospitalZhejiang University School of MedicineHuzhou 313000China

Background: Obesity is a common public health issue and is currently deemed a disease. Research has shown that the risk of gallstones in individuals with obesity is elevated. This study aimed to explore the bile proteomics differences between cholelithiasis patients with obesity and normal body weight. Methods: Bile samples from 20 patients(10 with obesity and 10 with normal body weight) who underwent laparoscopic cholecystectomy at our center were subjected to tandem mass tag labeling(TMT) and liquid chromatography-tandem mass spectrometry(LC-MS/MS), followed by further bioinformatic analysis. Results: Among the differentially expressed proteins, 23 were upregulated and 67 were downregulated. Bioinformatic analysis indicated that these differentially expressed proteins were mainly involved in cell development, inflammatory responses, glycerolipid metabolic processes, and protein activation cascades. In addition, the activity of the peroxisome proliferator-activated receptor(PPAR, a subfamily of nuclear receptors) signaling pathway was decreased in the Kyoto Encyclopedia of Genes and Genomes(KEGG) enrichment analysis. Two downregulated proteins in the PPAR signaling pathway, APO A-Ⅰ and APO A-Ⅱ, were confirmed using enzyme-linked immunosorbent assay. Conclusions: The PPAR signaling pathway may play a crucial role in the development of cholelithiasis among patients with obesity. Furthermore, biliary proteomics profiling of gallstones patients with obesity is revealed, providing a reference for future research.

关键词： Proteome profiling Gallstones Obesity-associated gallstones Tandem mass tag labeling PPAR signaling

Recent advances in glycerol valorization through electrocatalytic methods

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Tungsten 2024年第4期6卷 696-710页

作者： Hao-hai Dong Yu-Xin Zhu Yi-Gu Li Jia-Yan Liang Ya Tan Xin-Yue Zhang Hao-min Jiang Liu Lin Ze-min Sun Center for Advanced Materials Research & College of Arts and Sciences Beijing Normal University Department of Chemistry University College London

The recent tremendous growth of biodiesel production from vegetable oils or waste fats has led to increased glycerol accumulation as a by-product of this *** sparked attention towards glycerol use and valorization of this largely available and cheap *** several methods for glycerol valorization,electrochemical glycerol oxidation reaction(EGOR)is an attractive alternative anodic reaction to oxygen evolution reaction for a variety of electrolytic synthesis,due to the low thermodynamic ***,the EGOR at the anode can be coupled with a cathodic hydrogen evolution reaction to achieve efficient energy conversion in an aqueous electrolytic *** review provides a comprehensive summary and critical analysis of glycerol electrochemical oxidation research during the last 5 *** review focuses on the recent development and prospects of electrochemical pathways(indirect or direct routes) for application in the *** particular,the recent development and prospects of using noble and non-noble group metal catalysts for glycerol electro-oxidation are ***,reaction product selectivity analysis and conversion efficiency are also highlighted.

关键词： Active oxygen species Electrocatalytic methods Glycerol Noble metal catalysts Non-noble metal catalysts

Insight into vertical piezoelectric characteristics regulated thermal transport in van der Waals two-dimensional materials

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Rare Metals 2024年第2期43卷 770-779页

作者： Dong-hai Wei E Zhou Jin-Yuan Xu Hui-min Wang Chen Shen Hong-Bin Zhang Zhen-Zhen Qin Guang-Zhao Qin State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle EngineeringHunan UniversityChangsha410082China Hunan Key Laboratory for Micro-Nano Energy Materials and Device and School of Physics and Optoelectronics Xiangtan UniversityXiangtan411105China Institute of Materials Science Technical University of DarmstadtAlarich-Weiss-Str.264287DarmstadtGermany School of Physics and Microelectronics Zhengzhou UniversityZhengzhou450001China

The urgent demand of extreme(ultra-high/low)thermal conductivity materials is triggered by the high-power device,where exploring the theories and mechanisms of regulating thermal transport properties plays a key ***,we elaborately investigate the effect of vertical(out-of-plane)piezoelectric characteristics on thermal transport,which is historically *** different stacking-order(AA and AB)bilayer boron nitride(Bi-BN)in two-dimensional(2D)materials are selected as study *** performing state-of-the-art first-principles calculations,it is found that the polarization charge along the out-of-plane orientation ascends significantly with the increasing piezoelectric response in AB stacked Bi-BN(Bi-BN-AB)followed by the enhanced interlayer B–N atomic ***,the amplitude of phonon anharmonicity in Bi-BN-AB increases larger than that in the AA stacked Bi-BN(Bi-BN-AA),resulting in the dramatic weakening of the thermal conductivity by 20.34%under 18%*** research reveals the significant role of the vertical(out-of-plane)piezoelectric characteristic in regulating thermal transport and provides new insight into accurately exploring the thermal transport performance of 2D van der Waals materials.

关键词： Thermal conductivity Piezoelectric effect 2D materials Bilayer BN Strain engineering

The influence of initiating and reacting joint attention on social orienting

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The influence of initiating and reacting joint attention on ...

Geology and mineralization of the Dongping supergiant alkalic-hosted Au-Te deposit(>100 t Au)in Northern Hebei Province,China:A review

第二十四届全国心理学学术会议

作者： Yanying Tian min hai Tingkang Zhang Yonghui Wang the College of Psychology Shaanxi Normal University

Before social cognition there is jointly coordination of attention information of self and *** non-verbal reciprocal coordination of attention facilitates the development of the capacity to share experiences about objects or events with others,otherwise known as joint *** JA,an initiator spontaneously selects a shared point of reference,and the responder follows the direction of the initiator’s gaze to share the attention on the *** view of this,researches into the early development of joint attention distinguish between initiative joint attention(IJA) by directing or leading the attention of others,and reactive joint attention(RJA) by following the direction of others’ attention to share a common point of *** social interactions,joint attention plays a fundamental role that guarantees we refer to the same object,understand each other’s mental states,coordinate our actions,and improve sophisticated social *** evidences at both the behavioral and neural circuit levels demonstrate that engaging in joint attention modulates multiple cognitive abilities,in particular the social orienting of the initiator to *** work in gaze leading establishes that participants spontaneously orient their attention towards faces that have followed their gaze,even though without explicit instructions to do *** findings appear to offer an implicit but reliable insight into that people who follow our gaze to engage in joint attention are prioritized for visual processing,and this attention shift could contribute to the maintenance and evaluation of an ongoing social ***,it remains an open question whether this distinct attention form,social orienting,is simply presented by initiator Yet,joint attention is the result of reciprocal interaction of both initiator and ***,the current research predicted that the responder would present a similar pattern of social orienting,but it is different from ini

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China Geology 2024年第3期7卷 533-550页

作者： Shi-min Zhen Da-zhao Wang Zhong-jian Zha hai-jun Bai Jiang Wang Development and Research Center of China Geological Survey Ministry of Natural ResourcesBeijing 100037China Technical Guidance Center for mineral Resources Exploration Ministry of Natural ResourcesBeijing 100037China State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China Institute of Geological Surveying and Mapping Technology of Anhui Province Hefei 230022China Third Geological Brigade of Hebei Bureau of Geology and mineral Resources Zhangjiakou 075000China Ulanqab Real Estate Registration Center Ulanqab 012099China

The Dongping deposit is the largest alkalic-hosted gold deposit in China containing>100 t of *** paper presents a new understanding for Dongping ore system,based on the previous *** mineralization originally occurred at 400-380 Ma,simultaneous with emplacement of the Shuiquangou alkaline complex,and was overprinted by the hydrothermal activity in the *** compositions of ores indicate metals of the deposit are mainly provided by the Shuiquangou ***-forming fluids are characterized by increasing oxygen fugacity and decreasing sulfur fugacity,while tellurium fugacity increased in the Stage II-2 and decreased in Stage *** systematic changes are closely related to the processes of mineral precipitation and fluid *** precipitation from Stage Ⅰ to Stage Ⅱ was triggered by fluid boiling,which leads to the precipitation of Pb-Bi-Te,due to decrement of sulfur *** of gas phase containing high concentration of H_2Te leads to precipitation of Te-Au-Ag minerals and native *** on these hypotheses,this paper present a polyphase metallogenic model as *** the Devonian,fluids were released from alkaline magmas,which carried ore-forming materials form the surrounding rocks and precipitate the early *** the Jurassic-Cretaceous,fluorine-rich fluids exsolved from highly factionated Shangshuiquan granite,which extracted and concentrated Au from the Shuiquangou complex and the Sanggan Group metamorphic rocks,and finally formed the Dongping gold deposit.

关键词： mineralization and alteration Alkaline intrusion Au deposit Physicochemical conditions Metallogenic model Oxygen fugacity Sulfur fugacity Mechanisms of mineral precipitation Fluid boiling Fluorine-enriched fluid Dongping gold deposit North China Craton mineral exploration engineering

GATA3 siRNA inhibits the binding of NFAT1 to interleukin-13 promoter in human T cells

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Chinese Medical Journal 2010年第6期123卷 739-744页

作者： YAO Xin YANG Yan HE hai-yan WANG min YIN Kai-sheng HUANG Mao Department of Respiratory Disease First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsu 210029China

Background Intedeukin-13 （IL-13） is recognized to be a key modulator in the pathogenesis of Th2-induced allergic inflammation. Transcription factors GATA3 and NFAT1 have been both implicated in the regulation of Th2 cytokines. We previously demonstrated the GATA3-NFAT1 association during human T cell activation. However, the function of the GATA3-NFAT1 complex in Th2 cytokines regulation is still unknown. Small interference RNA （siRNA） was constructed to knock down GATA3 expression in Hut-78 cells to investigate the possible role of GATA3-NFAT1 complex in IL-13 *** Cells were stimulated with anti-CD3 plus anti-CD28 antibodies to mimic in vivo antigen-mediated co-stimulation; the expression of IL-13 mRNA was determined by real-time PCR; chromation immunoprecipitation （CHIP） assay was employed to investigate the NFAT1 binding to IL-13 promoter. Results GATA3 siRNA suppressed the expression of GATA3 both in mRNA and protein levels in Hut-78 cells. The binding of NFAT1 to IL-13 promoter was inhibited by GATA3 siRNA in activated T cells, which was followed by the reduction of IL-13 *** GATA3-NFAT1 complex may play an important role in the regulation of IL-13 transcription in human T cells.

关键词： interleukin-13 asthma GATA3 NFAT1

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南堡凹陷高柳地区二次三维地震采集技术

石油勘探与开发 2006年第4期33卷 444-447页

作者：谢占安周海民中国科学院地质与地球物理研究所中国石油冀东油田公司

南堡凹陷高柳地区原有地震资料品质较低,已不能满足该区油气资源挖潜需要,为此在该区进行了二次三维地震勘探。针对该区地表条件复杂及地下地层倾角大、断层发育、断块小且多的特点,制定了合理的施工方案,采用恢复炮点变观、炮点横向移... 详细信息

南堡凹陷高柳地区原有地震资料品质较低,已不能满足该区油气资源挖潜需要,为此在该区进行了二次三维地震勘探。针对该区地表条件复杂及地下地层倾角大、断层发育、断块小且多的特点,制定了合理的施工方案,采用恢复炮点变观、炮点横向移动变观和块状特观设计等先进的地面设计施工技术,并对地震采集方法及各项参数进行了全面优化。实践表明二次三维地震剖面不仅拥有较高的信噪比,同时具有较高的分辨率,浅层资料可充分满足精细构造解释和高分辨率储集层反演需要,中、深层资料能够准确落实构造形态、进行层序地层学研究。以二次三维地震资料为基础,通过开展综合地质研究,经过少量探井、评价井的实施,新增含油面积85.5km2,三级石油地质储量25 601万t。

关键词：二次三维地震采集变观技术特观技术