Results 21 to 30 of about 48,776 (135)
, 2021 采用块体动力学分析系统(Block Dyna)中的渗流模块,对裂隙岩体中的压水灌浆规律进行了数值模拟。采用达西渗流模型描述压水过程,采用宾汉渗流模型描述灌浆过程,分别探讨了裂隙数量、裂隙开度对压水吕荣值及灌浆注入量的影响规律。计算结果表明,随着裂隙数量、裂隙开度的增大,吕荣值及浆液注入量均呈现逐渐增大的趋势。裂隙开度对压水吕荣值的影响是二次方关系,裂隙条数是一次方关系,裂隙开度对压水吕荣值的改变更为敏感。由于裂隙随机性及浆液进入截止开度等因素的影响 ...
朱心广 +6 more
core +2 more sources
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Porous NiTi alloys are widely used in biomedical and engineering fields. Using the PBF‐LB technique, the TPMS and Voronoi porous parts with a porosity of ∼67% and a minimum feature size of 0.15 ± 0.02 mm were fabricated. Although the bulk sample fabricated with the same parameters is defect‐free, μ‐CT reconstruction on the porous sample ...
Wen‐Hao Zeng +7 more
wiley +1 more source
Dizhen xuebao, 2023 为了深入分析2022年1月8日青海门源MS6.9地震引发的不同类型地表破裂特征及震害现象，本文依据沿此次地震地表破裂带进行的野外实地考察和无人机航拍解译，将破裂带沿线的典型同震地表破裂特征归纳为：① 多种典型几何细结构，包括雁列状次级破裂、左旋左阶拉张区、左旋右阶挤压区以及树枝状、网状破裂等；② 多种地貌标志物水平位错，包括牧区围栏、车辙印、动物脚印和冲沟冰面的左旋断错等；③ 多种类型垂直破裂，如逆冲型地震陡坎和正断型地震陡坎；④ 多种类型挤压破裂，如挤压脊和挤压鼓包；⑤ 不同类型张性裂缝带 ...
Ruihuan Su +5 more
doaj +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT In recent years, the field of magnetic materials has witnessed a paradigm shift from single‐function applications to multifunctional integration, driven by the growing demand for smart materials in advanced technologies. Among various magnetic systems, La(Fe, Si/Al)13‐series materials have emerged as particularly promising candidates due to ...
Irfan Liaquat +2 more
wiley +1 more source
Shuitu Baochi Xuebao, 2020 为探究喀斯特浅层裂隙所赋存土壤各土层渗透性特征及影响因素，测定了喀斯特典型的浅层裂隙中赋存土壤0—10，10—20，20—30，30—50，50—70，70—100 cm土层的饱和导水率、机械组成、容重、非毛管孔隙度、毛管孔隙度、总孔隙度和有机碳含量等土壤属性。结果表明：（1）喀斯特浅层裂隙中各土壤属性均随着土层深度变化呈现出递增或递减的趋势，其中容重、黏粒含量、毛管孔隙度均随着土层深度而增长，饱和导水率、有机碳、非毛管孔隙度等土壤属性随土层深度的变化规律相反，呈递减趋势。（2 ...
李焱秋 +6 more
doaj
On the Damage Tolerance of Diffusion Bonded Titanium–Aluminum Phase Biomimetic Composites
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT The biomimetic design principles of natural structures involve the strategic integration of stiff and compliant phases to synergistically enhance strength and toughness. Its evolutionary refined natural armor, characterized by a specialized microarchitecture, enables superior damage tolerance.
Shuai Tong +10 more
wiley +1 more source
, 1987 本文在对不同温度热处理的花岗岩试件的裂隙微观特征及宏观力学性质的考察之后,建立了抗拉强度与微裂隙密度的关系。在理论模型要求的范围内,理论与实验结果吻合较好。 该工作对设计储藏核废料,化学废料 ...
寇绍全, O.Alm
core +2 more sources
Coordination of cortex modifications in time, space, and under stress
New Phytologist, Volume 248, Issue 4, Page 1677-1685, November 2025.Summary In roots, cell‐type‐specific differentiation enables specialized responses to environmental stress. The cortex, located between the vasculature and epidermis, is a key site for stress‐responsive modifications. The distinct specializations of the cortex are controlled by developmental, positional and environmental signals.
Dorota Kawa +2 more
wiley +1 more source
New Phytologist, Volume 248, Issue 2, Page 656-671, October 2025.Summary Formation of an aqueous continuum from the leaf surface to the sub‐stomatal cavity is a key process, affecting the foliar entry of solutes, particles, and pathogens. However, the factors controlling the transition from a water droplet to the formation of a continuous water film remain poorly understood.
Max Frank +8 more
wiley +1 more source
Dizhen xuebao, 2018 2010年8月至2015年12月，福建仙游地区发生了一系列小震群活动。基于孔隙压力扩散机制对精定位的小震数据进行分析，结果显示仙游震群序列在空间上呈丛集分布，且具有明显的分区现象，发震时间受金钟水库水位变化的调制作用较为明显。5个分区（A—E）的流体孔隙压力扩散系数分别为0.04，0.08，0.07，0.12和0.05 m2/s，伴随着地震活动性由强至弱，孔隙压扩散系数呈先增后减的变化规律。仙游震群位于断裂构造发育区内，震中分布优势方向与石苍断裂一致，沿着断裂走向的孔隙压扩散系数最大 ...
Shufang Hu +3 more
doaj +1 more source