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应变率对一组断裂的影响

世界地震译丛 1996年第1期27卷 67-71页

作者： H.Wu d.d.pollard 吴玉荣国家地震局地壳应力研究所

1.引言在岩石工程中,爆破和地震产生的应变可能是以秒计,而采矿过程可持续数年。因此,应变率变化范围可能超过10个数量级。由于应变率的变化,岩体的力学性质和断裂特性可能发生显著的变化。例如,在较低的应变率条件下,大部分岩石变得软... 详细信息

1.引言在岩石工程中,爆破和地震产生的应变可能是以秒计,而采矿过程可持续数年。因此,应变率变化范围可能超过10个数量级。由于应变率的变化,岩体的力学性质和断裂特性可能发生显著的变化。例如,在较低的应变率条件下,大部分岩石变得软弱。由于应变率的变化以及由此产生不同的断裂模型和几何形状,因此,脆性岩石断裂扩展速度也可能涉及到几个数量级。

关键词：应变率断裂岩石断裂岩土工程

应用钻孔数据预测层状岩体断裂密度和排水距离

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世界地震译丛 1996年第3期27卷 74-81页

作者： H.Wu E.J.M.Willemse d.d.pollard 吴玉荣国家地震局地壳应力研究所

我们提出了一种基于钻孔数据评估断裂密度和排水距离的简单方法。该方法适用于平行于层理的钻孔,是建立在观察露头的断裂间距及实验模拟的断裂模式研究基础上的。应该强调,该方法不是预测岩体的渗透性和流动速率。确切地说,用该方法来... 详细信息

我们提出了一种基于钻孔数据评估断裂密度和排水距离的简单方法。该方法适用于平行于层理的钻孔,是建立在观察露头的断裂间距及实验模拟的断裂模式研究基础上的。应该强调,该方法不是预测岩体的渗透性和流动速率。确切地说,用该方法来识别具有长断裂排水距离的高断裂密度的区间是恰当的。为了评价这种方法,将二维的已知断裂模式特征与一维的有限数据进行了比较。一维数据是从通过上述已知断裂分布的钻孔中获取的。

关键词：钻孔数据层状岩体断裂密度断层排水距离

考虑应力触发余震的第三维:1993年俄勒冈克拉马斯福尔斯地震序列

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世界地震译丛 2003年第1期34卷 62-66页

作者： J.G.Crider d.P.Schaff d.d.pollard G.C.Beroza 王俊国天津市地震局

有限维断层上的倾滑产生的静态应力变化在三维情况下有很大改变。1993年的美国俄勒冈州克拉马斯福尔斯地震序列显示出位于断层外的浅源余震群具有混合的倾滑和走滑震源机制。模拟的静态应力变化与余震位置表明,用传统的二维方法观察会... 详细信息

有限维断层上的倾滑产生的静态应力变化在三维情况下有很大改变。1993年的美国俄勒冈州克拉马斯福尔斯地震序列显示出位于断层外的浅源余震群具有混合的倾滑和走滑震源机制。模拟的静态应力变化与余震位置表明,用传统的二维方法观察会得出使人误解的结果。而完整的三维分析方法表明浅源右旋滑动与倾滑主震之后的局部应力扰动一致。

关键词：应力触发余震 1993年俄勒冈州地震序列断层走滑震源机制

Tailored design of novel Co0-Coδ+dual phase nanoparticles for selective CO2 hydrogenation to ethanol

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Journal of Environmental Sciences 2025年第3期149卷 598-615页

作者： Subhasis das Ganapati d.Yadav department of Chemical Engineering Institute of Chemical TechnologyNathalal Parekh MargMatunga 400019MumbaiIndia

Catalytic hydrogenation of CO_(2)to ethanol is a promising solution to address the greenhouse gas(GHG)emissions,but many current catalysts face efficiency and cost *** based catalysts are frequently examined due to their abundance,cost-efficiency,and effectiveness in the reaction,where managing the Co^(0)to Co^(δ+)ratio is *** this study,we adjusted support nature(Al_(2)O_(3),MgO-MgAl_(2)O_(4),and MgO)and reduction conditions to optimize this balance of Co^(0)to Co^(δ+)sites on the catalyst surface,enhancing ethanol *** selectivity of ethanol reached 17.9%in a continuous flow fixed bed micro-reactor over 20 mol%Co@MgO-MgAl_(2)O_(4)(CoMgAl)catalyst at 270°C and 3.0 MPa,when reduced at 400°C for 8 *** results coupled with activity analysis confirmed that mild reduction condition(400°C,10%H_(2)balance N_(2),8 h)with intermediate metal support interaction favoured the generation of partially reduced Co sites(Co^(δ+)and Co^(0)sites in single atom)over MgO-MgAl_(2)O_(4)surface,which promoted ethanol synthesis by coupling of dissociative(CHx^(∗))/non-dissociative(CHxO^(∗))intermediates,as confirmed by density functional theory ***,the CoMgAl,affordably prepared through the coprecipitation method,offers a potential alternative for CO_(2)hydrogenation to yield valuable chemicals.

关键词： CO_(2)hydrogenation Ethanol Co-based catalysts Metal support ineraction dFT analysis

Biochemical dissection of STAT3 signaling in amyotrophic lateral sclerosis

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Neural Regeneration Research 2025年第11期20卷 3229-3230页

作者： Savina Apolloni Nadia d’Ambrosi department of Biology University of Rome Tor VergataRomeItaly

Amyotrophic lateral sclerosis(ALS)is a progressive neurodegenerative disease characterized by the loss of upper and lower motor neurons,clinically marked by muscle atrophy and *** the clinical course is highly variable,the average time from the onset of symptoms to the need for respiratory support or death is 3-5 *** is the most prevalent motor neuron disease in adults,occurring at a rate of 2 per 100,000 individuals and affecting 5.4 per 100,000 individuals overall.

关键词： STAT3 dissection sclerosis

From Imperfection to Perfection: Advanced 3d Facial Reconstruction Using MICA Models and Self-Supervision Learning

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Computer Modeling in Engineering & Sciences 2025年第2期142卷 1459-1479页

作者： Thinh d.Le duong Q.Nguyen Phuong d.Nguyen H.Nguyen-Xuan CIRTECH Institute HUTECH UniversityHo Chi Minh City72308Viet Nam

Research on reconstructing imperfect faces is a challenging *** this study,we explore a data-driven approach using a pre-trained MICA(MetrIC fAce)model combined with 3d printing to address this *** propose a training strategy that utilizes the pre-trained MICA model and self-supervised learning techniques to improve accuracy and reduce the time needed for 3d facial structure *** results demonstrate high accuracy,evaluated by the geometric loss function and various statistical *** showcase the effectiveness of the approach,we used 3d printing to create a model that covers facial *** findings indicate that our method produces a model that fits well and achieves comprehensive 3d facial *** technique has the potential to aid doctors in treating patients with facial injuries.

关键词： 3d face reconstruction self-supervised learning face defect 3d printed prototypes

Anti-amyloid antibodies in Alzheimer’s disease: what did clinical trials teach us?

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Neural Regeneration Research 2025年第4期20卷 1092-1093页

作者： danko Jeremic Lydia Jiménez-díaz Juan d.Navarro-López NeuroPhysiology&Behavior Lab University of Castilla-La ManchaBiomedical Research Center(CRIB)School of Medicine of Ciudad RealCiudad RealSpain

Although many causes of Alzheimer’s disease(Ad)may exist,both the original amyloid cascade and tau hypotheses posit that abnormal misfolding and accumulation of amyloid-β(Aβ)and tau protein is the central event causing the ***,that conclusion could be only partly true,and there is conflicting evidence about the role of both proteins in Ad,being able to precede and influence one *** researchers argue that these proteins are mere executors rather than primary causes of ***,there have been continuing refinements of both hypotheses,with alternative explanations proposed.Aβand tau proteins may be independently involved in specific neurotoxic pathways;yet there may be other crucial processes going on in early ***,accumulating evidence suggests that Aβand tau act synergistically,rather than additively in disease onset(Jeremic et al.,2021,2023a).

关键词： amyloid Alzheimer additive

Remaking a connection:molecular players involved in post-injury synapse formation

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Neural Regeneration Research 2025年第6期20卷 1719-1720页

作者： diogo Tomé Ramiro d.Almeida iBiMEd-Institute of Biomedicine Department of Medical SciencesUniversity of AveiroAveiroPortugal CNC-Center for Neuroscience and Cell Biology University of CoimbraCoimbraPortugal

Functional recovery from central nervous system(CNS)trauma depends not only on axon regeneration or compensatory sprouting of uninjured fibers but also on the ability of newly grown axons to establish functional synapses with appropriate *** several studies have successfully promoted long-distance axonal regeneration in distinct CNS injury models,none of them have resulted in a viable therapeutic approach for patient recovery.A possible reason may be the lack of new synaptogenesis for reestablishing the circuitry lost after ***,we discuss how our understanding of the mechanisms that instruct synapse formation in the injured nervous system may contribute to the design of new strategies to promote functional restoration in traumatic CNS disorders.

关键词： viable injury instru

Finding the balance: Modifying the cholesterol and steroidal glycoalkaloid synthesis pathway in tomato(Solanum lycopersicum L.) for human health, fruit flavor, and plant defense

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Horticultural Plant Journal 2025年第1期11卷 42-56页

作者： Vincenzo Averello IV Adrian d.Hegeman Changbin Chen department of Horticultural Science University of Minnesota1970 Folwell AvenueSt.PaulMN 55108USA School of Life Sciences Arizona State University427 E Tyler MalTempeAZ 85287USA

Unlike most plants, members of the genus Solanum produce cholesterol and use this as a precursor for steroidal glycoalkaloids. The production of the compounds begins as a branch from brassinosteroid biosynthesis, which produces cholesterol that is further modified to produce steroidal glycoalkaloids. during the cholesterol biosynthesis pathway, genetic engineering could alter the formation of cholesterol from provitamin d3(7-dehydrocholesterol) and produce vitamin d3. Cholesterol is a precursor for many steroidal glycoalkaloids, including a-tomatine and esculeoside A. Alpha-tomatine is consumed by mammals and it can reduce cholesterol content and improve LdL:HdL ratio. When there is a high a-tomatine content, the fruit will have a bitter flavor, which together with other steroidal glycoalkaloids serving as protective and defensive compounds for tomato against insect, fungal, and bacterial pests. These compounds also affect the rhizosphere bacteria by recruiting beneficial bacteria. One of the steroidal glycoalkaloids, esculeoside A increases while fruit ripening. This review focuses on recent studies that uncovered key reactions of the production of cholesterol and steroidal glycoalkaloids in tomato connecting to human health, fruit flavor, and plant defense and the potential application for tomato crop improvement.

关键词： Cholesterol Steroidal glycoalkaloids Tomato Biosynthesis a-tomatine Sterols Terpenoids Plant defense