Results 61 to 70 of about 645,579 (148)
用云纹干涉法测量了带边裂纹的双材料四点简支梁在剪切作用下界面表面的剪应变分布及界面两侧局部表面的位移场(U、V场);试件是由弹性模量相差悬殊的铝合金和环氧塑料两种材料制成。文中给出了试件制备 ...
毛天祥, 韩金虎, 王自强
core +2 more sources
Effects of quercetin on immune regulation at the maternal-fetal interface. [PDF]
Fu Z +5 more
europepmc +1 more source
ABSTRACT Laser‐directed energy deposition (L‐DED) offers a flexible route for fabricating γ‐TiAl components, but the as‐deposited microstructure requires post‐processing to overcome limited deformation capability. Here, an L‐DED Ti–48Al–2Cr–2Nb alloy was subjected to solution and solution‐aging treatments.
Mengya Chu +6 more
wiley +1 more source
用梯度烧结法连接钨铜合金与纯铜或铜合金,并与传统的整体烧结、焊接、机械螺纹连接进行了对比分析,观察了结合界面和拉伸断口。结果表明,梯度烧结试样可以显著提高结合界面的抗拉强度(15%~30%)、降低电阻率(25%)。而且梯度烧结试样的界面表现为"犬牙交错"状,断裂方式为准解理,优于界面较为平整,断口呈解理断裂的其他几种连接方式。
陈文革, 陈勉之
doaj
ABSTRACT Bimetallic structures fabricated by laser powder bed fusion (LPBF) provide an effective strategy for achieving multifunctional integration, yet interfacial structural continuity and the role of lattice defects remain insufficiently understood.
Jinguo Ge, Shuo Yin
wiley +1 more source
[Detection and analysis of moving reaction boundary-based electrophoresis distance using smartphone images]. [PDF]
Song XQ +6 more
europepmc +1 more source
ABSTRACT High‐yield photocatalytic H2O2 production in sacrificial agent‐free pure water constitutes a critical bottleneck requiring urgent advances in energy catalysis. Although ZnIn2S4 (ZIS) exhibits favourable visible light absorption, it is plagued by severe bulk charge carrier recombination and scarce accessible surface‐active sites.
Sheng Liu +7 more
wiley +1 more source
通过界面有效吸收系数的计算及界面对腔模的反射率的影响可知,采用双面键合技术制备面发射激光器应使键合界面处于驻波场分布零点位置,同时界面厚度应该小于20nm以使器件光学性能受界面吸收系数的影响较小.采用有限元方法分析VCSEL温度分布,结果证实薄的键合界面使VCSEL有源区温度对界面的热导率和电导率改变不敏感,而厚的键合界面将可能使有源区温度有较大地升高,给器件带来严重的不良影响.亲水键合和疏水键合的SEM照片说明疏水处理界面较薄,适合用于器件的制备.而亲水处理界面厚度〉40nm,对器件的光 ...
渠红伟 +6 more
core
Risks of concealing environmental degradation
Abstract Current practice seeks to conceal the visual impact of land‐use change (i.e., development). Six percent of development impact assessments in Australia and 14% of the World Bank's assessments recommend visual impact mitigation. This mitigation results in, for example, vegetated buffer strips alongside cleared agricultural areas and earthen ...
Matt W. Hayward +8 more
wiley +1 more source
针对传统的线性超声理论在钢‑混凝土界面损伤检测中存在准确性低的问题,提出一种基于非线性超声调制理论的钢‑混凝土界面损伤识别方法。首先,在钢管混凝土内部嵌入智能骨料以激发高频超声信号,同时利用外部电磁激振器施加低频振动,从而调制出在频域上具有非线性特征的超声信号;其次,在钢管外壁的3个不同位置粘贴传感器,用于接收并记录经过界面调制的响应信号;然后,利用万能试验机开展加载试验,诱导钢‑混凝土界面产生不同程度的黏结失效,并定量分析界面裂缝扩展与损伤指标之间的变化规律;最后,通过对比分析验证该方法的有效性 ...
doaj +1 more source

