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Experimental study on permanent deformation characteristics of coarse-grained soil under repeated dynamic loading

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Railway Engineering Science 2021年第1期29卷 94-107页

作者： Huihao Mei Sajjad Satvati Wuming Leng China Railway 11 Bureau Group co. Ltd.Wuhan 430061China Terracon consultants IncOmahaNE 68144USA Department of Geotechnical Engineering School of Civil EngineeringCentral South UniversityChangsha 410075China

Practical assessment of subgrade settlement induced by train operation requires developing suitable models capable of describing permanent deformation characteristics of subgrade filling under repeated dynamic *** this paper,repeated load triaxial tests were performed on coarse-grained soil(CGS),and the axial permanent strain of CGS under different confining pressures and dynamic stress amplitudes was *** deformation behaviors of CGS were categorized based on the variation trend of permanent strain rate with accumulated permanent strain and the shakedown theory.A prediction model of permanent deformation considering stress state and number of load cycles was established,and the ranges of parameters for different types of dynamic behaviors were also *** results indicated that the variational trend of permanent strain rate with accumulated permanent strain can be used as a basis for classifying dynamic behaviors of *** stress state(confining pressure and dynamic stress amplitude)has significant effects on the permanent strain *** accumulative characteristics of permanent deformation of CGS with the number of load cycles can be described by a power function,and the model parameters can reflect the influence of confining pressure and dynamic stress *** study’s results could help deepen understanding of the permanent deformation characteristics of CGS.

关键词： Repeated load triaxial tests coarse grained soil Shakedown theory Dynamic stress Accumulated permanent strain Railway subgrade

DEVELOPMENT　OF　incONEL~　ALLOY　783，A　LOW　THERMAL　EXPANSION，CRACK　GROWTH　RESISTANT　SUPERALLOY

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Acta Metallurgica Sinica(English Letters) 1996年第6期9卷 503-507页

作者： J.H.Thndermann(inco Alloys International, inc., Huntington, WV 25705, USA ) inco Alloys Int inc. Huntington United States

Low thermal expansion superalloys have been used for a number of years in a variety of applications, including gas turbine engines. The low thermal expansion characteristics of the most widely used class of materials are derived from the ferromagnetic characteristics of Ni, Fe, and co-based austenitic matrices containing little or no *** developments have been aimed at improving the oxidation resistance and stress accelerated grain boundary oxygen (SAGBO) *** alloy 783 is an oxidation resistant, low coefficient of thermal expansion superalloy developed for gas turbine applications. Alloy 783 represents a culmination in the development, of an alloy system with very high alumtnum content that, in addition to forming γ′,causes βaluminide phase precipitation in the austenitic *** type of structure can be processed to resist both SAGBO and general oxidation,while providing low thermal expansion and useful mechanical properties up to 700℃.Key aspects of the alloy's development are presented.

关键词： coefficient of thermal expansion oxidation resistance crack growth resistance,SAGBO incONEL alloy 783,alloy 718,gamma prime phase beta phase

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选择性雄激素受体调节子的开发及其治疗应用

中华男科学杂志 2002年第3期8卷 162-168页

作者： Fang Chen( 陈芳)（Department of Bone Biology & Osteoporosis Research Merck Research Laboratories Merck & Co Inc. WP26A-1000 West Point PA 19486 USA）

雄激素控制着广泛的生理学功能.雄激素受体作为调节雄激素多种生物学作用的甾体类受体,是一种配基诱导的转录因子.雄激素信号系统的异常导致了从性别确定和性征发育到精神和情感失常的许多紊乱.雄激素替代治疗能改善许多临床症状,包括... 详细信息

雄激素控制着广泛的生理学功能.雄激素受体作为调节雄激素多种生物学作用的甾体类受体,是一种配基诱导的转录因子.雄激素信号系统的异常导致了从性别确定和性征发育到精神和情感失常的许多紊乱.雄激素替代治疗能改善许多临床症状,包括性腺机能低下与骨质疏松,但由于疗效不高和缺少方便给药的安全制剂而受到限制.最近甾体类受体和选择性受体调节子的基因调控技术,为选择性雄激素受体调节子能否解答现行雄激素治疗中存在的问题,提供了验证的机会.配基化的雄激素受体转录引发复合物的组成决定了基因调控的特异性,设计用于引发组织和启动子特异基因转录的合成配基提供了开发更有效的雄激素治疗的希望.建立能预测合成配基活性的测试方法是选择性雄激素受体调节子开发的关键.化合物筛选的高效率和基因指纹技术的进步,如微阵列技术和蛋白质组学,将加速有效的选择性受体调节子鉴定.

关键词：雄激素雄激素受体选择性雄激素受体调节子核受体调节子

FORCED VIBRATION TEST OF AN AB WR NUCLER REACTER BUILDING-SIMULATION ANALYSIS BY MDOF PARALLEL MODEL

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FORCED VIBRATION TEST OF AN AB WR NUCLER REACTER BUILDING-SI...

continual driver behaviour learning for connected vehicles and intelligent transportation systems: Framework, survey and challenges

第十八届国际反应堆结构力学大会

作者： Atsushi Onouchi Atsushi Tachibana Manager Chubu Electric Power Co. Inc. Japan Senior Staff Chubu Electric Power Co. Inc. Japan

The forced vibration test was performed to evaluate the dynamic characteristic of Hamaoka nuclear power plant unit-5 reactor building from May through June in 2003. Two 10-tonf-type large exciters were used at 5 floor, the fuel-operating floor, for each horizontal excitation in NS and EW directions. Sensors were set up at every 9 floors in order to measure the building responses. When the vibration test was performed, the building construction was completed and major equipments were installed in the building. The spent fuel pool and the suppression pool were

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Green Energy and Intelligent Transportation 2023年第4期2卷 69-80页

作者： Zirui Li Cheng Gong Yunlong Lin Guopeng Li Xinwei Wang Chao Lu Miao Wang Shanzhi Chen Jianwei Gong Chair of Traffic Process Automation “Friedrich List”Faculty of Transport and Traffic SciencesTU Dresden01069 DresdenGermany School of Mechanical Engineering Beijing Institute of Technology100081 BeijingChina Transport and Planning Civil Engineering and GeosciencesDelft University of Technology2628 CD Delft School of Engineering and Materials Science Queen Mary University of LondonE14NS LondonUK Baidu inc Beijing 100085China State Key Laboratory of Wireless Mobile communications China Information and Communication Technology Group Co.Ltd.(CICT)China

Modelling,predicting and analysing driver behaviours are essential to advanced driver assistance systems(ADAS)and the comprehensive understanding of complex driving ***,with the development of deep learning(DL),numerous driver behaviour learning(DBL)methods have been proposed and applied in connected vehicles(CV)and intelligent transportation systems(ITS).This study provides a review of DBL,which mainly focuses on typical applications in CV and ***,a comprehensive review of the state-of-the-art DBL is ***,Given the constantly changing nature of real driving scenarios,most existing learning-based models may suffer from the so-called“catastrophic forgetting,”which refers to their inability to perform well in previously learned scenarios after acquiring new *** a solution to the aforementioned issue,this paper presents a framework for continual driver behaviour learning(CDBL)by leveraging continual learning *** proposed CDBL framework is demonstrated to outperform existing methods in behaviour prediction through a case ***,future works,potential challenges and emerging trends in this area are highlighted.

关键词： Driver behaviours connected vehicles continual learning Machine learning Intelligent transportation systems

Acoustic emission characterization of microcracking in laboratory-scale hydraulic fracturing tests

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Journal of Rock Mechanics and Geotechnical Engineering 2018年第5期10卷 805-817页

作者： Jesse Hampton Marte Gutierrez Luis Matzar Dandan Hu Luke Frash Department of Civil & Environmental Engineering Colorado School of Mines Golden CO 80401 USA New England Research Inc. White River Junction VT 03766 USA Halliburton Houston TX 77032 USA Los Alamos National Laboratory Los Alamos NM 87545 USA

Understanding microcracking near coalesced fracture generation is critically important for hydrocarbon and geothermal reservoir characterization as well as damage evaluation in civil engineering structures. Dense and sometimes random microcracking near coalesced fracture formation alters the mechanical properties of the nearby virgin material. Individual microcrack characterization is also significant in quantifying the material changes near the fracture faces （i.e. damage）. Acoustic emission （AE） monitoring and analysis provide unique information regarding the microcracking process temporally, and infor- mation concerning the source characterization of individual microcracks can be extracted. In this context, laboratory hydraulic fracture tests were carried out while monitoring the AEs from several piezoelectric transducers. In-depth post-processing of the AE event data was performed for the purpose of under- standing the individual source mechanisms. Several source characterization techniques including moment tensor inversion, event parametric analysis, and volumetric deformation analysis were adopted. Post-test fracture characterization through coring, slicing and micro-computed tomographic imaging was performed to determine the coalesced fracture location and structure. Distinct differences in fracture characteristics were found spatially in relation to the openhole injection interval. Individual microcrack AE analysis showed substantial energy reduction emanating spatially from the injection interval. It was quantitatively observed that the recorded AE signals provided sufficient information to generalize the damage radiating spatially away from the injection wellbore.

关键词： Acoustic emission (AE) Microcracking Hydraulic fracturing Laboratory-scale testing Moment tensor analysis Fracture coalescence computed tomography (CT) imaging

Antioxidant,flavor profile and quality of wheat dough bread incorporated with kiwifruit fermented byβ-glucosidase producing lactic acid bacteria strains

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Food Bioscience 2022年第2期46卷 517-526页

作者： Liting Liang Jacob Ojobi Omedi Weining Huang Jianxian Zheng Yongqing Zeng Jing Huang Binle Zhang Liyuan Zhou Ning Li Tiecheng Gao Ruijun Guo State Key Laboratory of Food Science and Technology Laboratory of Baking and Fermentation ScienceCereals/Sourdough and Ingredient Functionality ResearchJiangnan UniversityWuxi214122China college of Food and Bioengineering South China University of TechnologyAnd Guangzhou Institute of Food IndustryGuangzhou510000China Fujian Zunjin Health Science and Technology co. Ltd.and IBF International Inc.QuanzhouFujian362200China Shenzhen Jinguyuan Industry Development co. Ltd.and IBF International Inc.Shenzhen branch 518000GuangdongChina

This study aimed to investigate the effect of incorporation of kiwifruit substrate fermented by 3 highβ-glucosidase producing lactic acid bacteria(LAB)of Lactobacillus harbinensis(M12,M24)and Pediococcus pentosaceus(J28)on physicochemical and rheo-fermentation properties during proofing of wheat ***,sensory evaluation,antioxidant content and activity,and flavor profiles of bread was *** revealed that LAB strains adequately adapted(J28>M12>M24)and produced enzymes during substrate *** dough,incorporation of fermented substrate increased acidity,soluble dietary fiber,β-glucosidase andα-amylase activity and gas retention during proofing,in a strain dependent manner(J28>M12>M24).The subsequent breads exhibited higher specific volume and had softer ***,total flavonoid,total phenolic,antioxidant activity,flavor content and intensity increased in breads incorporated with fermented *** sensory acceptance was in order,bread containing substrates fermented by J28(KFB-J28)>M12(KFB-M12)>M24(KFB-M24)>wheat bread(WB)>bread containing unfermented substrate(KFB).Changes observed were attributed to biotransformation byβ-glucosidase which increasingly degraded dietary fibers into soluble dietary fiber,increased acidity,released glycosylated aroma compounds and phenolic compounds in *** incorporated in dough,fermented kiwifruit substrates stabilized gluten network,increased yeast metabolism and gas retention during ***,KFB-J28,KFB-M12,and KFB-M24 had higher antioxidant content and activity,higher flavor content and intensity,better quality and were more accepted compared to WB and *** suggested the potential role played byβ-glucosidases through LAB fermentation on functionally enriching and adding value to kiwifruit substrate as a novel functional ingredient in bakery industry.

关键词： Lactic acid bacteria fermentation β-glucosidase Kiwifruit substrate Antioxidant property Flavor profile Bread baking quality

Biodegradation of polycyclic aromatic hydrocarbons(PAHs)by fungal enzymes:A review

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Journal of Environmental Sciences 2017年第1期29卷 52-74页

作者： Tayssir Kadri Tarek Rouissi Satinder Kaur Brar Maximiliano Cledon Saurabhjyoti Sarma Mausam Verma INRS-ETE Universite du Quebec490 Rue de la CouronneQuebecQC G1K 9A9Canada co2 Solutions inc. 2300rue Jean-PerrinQuebecQC G2C 1T9Canada

Polycyclic aromatic hydrocarbons（PAHs） are a large group of *** represent an important concern due to their widespread distribution in the environment,their resistance to biodegradation,their potential to bioaccumulate and their harmful *** pilot treatments have been implemented to prevent economic consequences and deterioration of soil and water *** a promising option,fungal enzymes are regarded as a powerful choice for degradation of *** chrysosporium,Pleurotus ostreatus and Bjerkandera adusta are most commonly used for the degradation of such compounds due to their production of ligninolytic enzymes such as lignin peroxidase,manganese peroxidase and *** rate of biodegradation depends on many culture conditions,such as temperature,oxygen,accessibility of nutrients and agitated or shallow ***,the addition of biosurfactants can strongly modify the enzyme *** removal of PAHs is dependent on the ionization *** study of the kinetics is not completely comprehended,and it becomes more challenging when fungi are applied for *** studies in soil are much more complicated than liquid cultures because of the heterogeneity of soil,thus,many factors should be considered when studying soil bioremediation,such as desorption and bioavailability of *** degradation pathways can be *** peroxidases are heme-containing enzymes having common catalytic *** molecule of hydrogen peroxide oxidizes the resting enzyme withdrawing two ***,the peroxidase is reduced back in two steps of one electron *** are copper-containing *** reduce molecular oxygen to water and oxidize phenolic compounds.

关键词： Polycyclic aromatic hydrocarbons (PAHs) Biodegradation Fungi Enzymes

Distinctions of dendritic behavior influenced by constant pressure and periodic pressure

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China Foundry 2021年第2期18卷 94-100页

作者： Shan Shang Zhi-peng Guo Zhi-qiang Han Xin-yu Zhang Yi-nuo Cheng Jun Li State Key Laboratory of Automotive Safety and Energy Tsinghua UniversityBeijing 100084China School of Vehicle and Mobility Tsinghua UniversityBeijing 100084China Beijing Supreium co. Ltd.Beijing 100089China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Beijing Jingwei Hirain Technologies co. Inc.Beijing 100191China

The distinctions of dendritic morphology and sidebranching behavior when solidified under atmosphere pressure,constant pressure which is higher than atmosphere pressure (hereinafter referred to as constant pressure) and periodic pressure were investigated using 3-D phase field *** growing at atmosphere pressure,side branches (secondary dendritic arms) are *** solidified under constant pressure with a relatively high value,side branches are much more luxuriant,with more developed high-order side *** applied with periodic pressure,resonant sidebranching happens,leading to many more regular side branches and the smallest secondary dendritic arm spacing (SDAS) in the three *** significant difference in dendritic morphology is associated with tip velocity modulated by total undercooling including pressure and temperature *** the case of constant pressure,tip velocity increases linearly with total undercooling,and it varies periodically in periodic pressure *** different variation trend in tip velocity is the reason for the distinct dendrite growth behavior in different *** the phenomenon in constant pressure case where the dendrite grows faster with higher pressure,the dendrite grows slower under periodic pressure with higher amplitude,resulting in less developed primary dendrite and side *** is influenced by tip remelting due to low undercooling or even negative *** is revealed that the accelerated velocity of tip remelting increases with the decline of *** greater the amplitude of periodic pressure,the faster the tip remelting velocity during one *** is the reason why the average tip velocity decreases with the rise of amplitude of periodic pressure.

关键词： periodic pressure sidebranching amplitude tip velocity undercooling phase field method