Results 71 to 80 of about 645,131 (154)
[Experimental Study on the Characteristic Changes of the Immunological Microenvironment at the Maternal-Fetal Interface in IVF-ET Pregnancy]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue Ban, 2023 Liu Y +7 more
europepmc +1 more source
Time‐Efficient Columnar‐to‐Equiaxed Transition via High Magnetic Field Processing
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT The need to simplify processing routes and improve processing efficiency motivates the development of time‐efficient methods for inducing the columnar‐to‐equiaxed transition (CET) during solidification while tailoring material performance. Conventional multistep CET approaches are time‐consuming and often struggle to simultaneously regulate ...
Chendong Zhao +12 more
wiley +1 more source
Gaoya dianqi, 2010 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
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT In laser‐directed energy deposition (LDED) of TiC/Ti6Al4V composites, a low content of micron‐sized TiC provides a good strengthening effect on hardness and strength, but the improvement in plasticity remains a challenge. By introducing synchronous ultrasonic impact treatment (UIT) into the LDED process, an ultrasonic‐assisted LDED (UA‐LDED ...
Yuzhou Zeng +9 more
wiley +1 more source
Zhendong Ceshi yu Zhenduan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
Hybrid Flexible–Soft Neural Interface as a Practical Solution for Long‐Term Implants
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Implantable neural interfaces face persistent challenges in long‐term functionality due to chronic immune responses, mechanical mismatch with tissue, and material corrosion in vivo. The commonly used flexible materials, such as polyimide and parylene‐C (poly[monochloro‐p‐xylylene]), have advantages in low water vapor permeability and high ...
Bowen Ji +13 more
wiley +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Lithium metal anode and zinc metal anode have attracted considerable attention owing to their high theoretical capacity, low electrochemical potential, and superior electronic conductivity. However, their practical applications are greatly hindered by inherent issues such as uncontrollable dendritic growth and interfacial instability ...
Jing Wang +10 more
wiley +1 more source
, 1991 界面断裂力学是目前国际力学界的前沿研究课题.本文对这门新兴分支学科的发展背景,近期进展及未来展望作了简要介绍.主要分析了各向同性及各向异性弹性材料间的界面裂纹;界面裂纹的力学模型;界面裂纹的弹塑性场及界面裂纹的断裂观念 ...
王自强
core +2 more sources
Shuitu Baochi Xuebao, 2023 以明确自然界中广泛存在的层状结构土壤孔隙分布特征为目的。选黄土高原典型坝地土壤剖面为研究对象,利用CT扫描技术分析耕作层、犁底层、心土层土壤三维结构,探讨层状土孔隙参数随土层结构变化及界面层孔隙特征。结果表明:(1)瘦长型孔隙(孔隙形状系数≤0.2)是各土层土壤孔隙的主要形态。各土层的孔隙参数具有明显差异。耕作层的总孔隙度最高,大孔隙(≥1 mm)分布较多;犁底层孔隙总数量最高,含有较多孤立的小孔隙(≥0.1~0.5 mm)和微小孔隙(≥0.06~0.1 mm),但连通性最差 ...
张佐源 +5 more
doaj
World Medical &Health Policy, Volume 18, Issue 3, September 2026.ABSTRACT Confrontational violence still puts catastrophic burdens on children, with 2024 being the highest recorded levels of displacement, malnutrition, injury, and deprivation in contemporary humanitarian history. Children's surgical care is still grossly underrepresented in health responses worldwide in the prevention of avoidable deaths and long ...
Gaurav Chanderprakash Mittal +4 more
wiley +1 more source