Results 1 to 10 of about 933 (85)
Jianzhu Gangjiegou Jinzhan, 2022 为了探究钢-混凝土组合梁中摩擦型高强螺栓抗剪连接件的受剪性能，采用ABAQUS有限元软件建立了抗滑移试件和推出试件有限元模型，并通过与试验结果的对比验证了数值模拟的可靠性。试件抗滑移性能与螺栓预拉力密切相关，且在螺栓杆应力状态处于弹性工作范围时，预拉力的施加取决于混凝土的局部抗压损能力。通过数值分析研究了垫片尺寸、混凝土强度和混凝土板厚度、螺栓直径和强度等级对螺栓预拉力的影响。此外，通过对推出试件进行有限元参数化分析，研究了混凝土强度、混凝土板厚度、螺栓预拉力和螺栓直径对抗滑移强度 ...
刘雁斌 +4 more
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Jianzhu Gangjiegou Jinzhan, 2023 相较于普通的双钢板混凝土组合板，双波纹钢板混凝土组合板具有更大的平面外抗弯刚度、抗压承载力与抗剪承载力，在超高层建筑、海洋平台等结构中具有广泛的应用潜力。首先建立了双波纹钢板混凝土组合板有限元模型，利用ANSYS/LS-DYNA非线性软件对双波纹钢板混凝土组合板的破坏模式和爆炸响应进行了数值分析，并与双钢板混凝土组合板接触爆炸试验进行对比，验证了数值分析方法的准确性。参数化分析了波纹对齐方式、波纹深度和波纹密度对双波纹钢板混凝土组合板抗爆性能的影响规律。结果表明，接触爆炸作用下 ...
赵春风, 周志航, 叶昕, 李晓杰
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Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The healing of diabetic chronic wounds is hindered by multiple pathological barriers, including oxidative stress imbalance induced by hyperglycemia, persistent bacterial infection, and impaired neovascular function. This study developed an F127–HA–BiOCl@CeO2 (FHBC) hydrogel dressing with acoustic responsiveness, achieving tissue repair through
Ran Zhao +8 more
wiley +1 more source
Microstructure Tailoring of Laser Powder Bed Fused Nb521 Alloy Toward Strength‐Ductility Synergy
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Niobium‐based refractory alloys are promising candidates for high‐temperature aerospace structures, yet their limited ambient‐temperature ductility and poor processability remain major barriers to broader implementation. Here, Nb521 alloy was fabricated by laser powder bed fusion (LPBF), and the effects of processing conditions and subsequent ...
Lele Qin +7 more
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Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Infected bone defects represent a dual therapeutic challenge demanding concurrent infection inhibition and osteogenesis promotion. Systemic antibiotic administration is taken as a classical treatment protocol but often yields inadequate local antibiotic concentrations and delayed bone repair.
Xucai Wang +8 more
wiley +1 more source
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Lignin is a natural non‐toxic polyphenolic macromolecule, which shows inherent antioxidant and broad‐spectrum antibacterial activities. However, due to the low content and the high bond dissociation energy of phenolic hydroxyl groups (Ar‐O·H), its antioxidant and antibacterial activities are relatively weak, which limits its application as a ...
Meiling Han +10 more
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Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Directed energy deposition (DED) is an effective method to process complex components with high efficiency, owing to its significant advantage of material saving and features of microarea metallurgy and rapid solidification. This study presents a nano‐Ta‐optimized Ti‐45Al‐8Nb (at%)‐based alloy synthesized via DED. The prepared TiAl‐based alloy
Yi Song +8 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2014 人体的抗凝系统主要有抗凝血酶（antithrombin,AT）系统（包括抗凝血酶和肝素,主要抑制具有丝氨酸蛋白酶活性的凝血因子,如:FXa,凝血酶等）和蛋白C系统（包括蛋白C,蛋白S,血栓调节蛋白,内皮细胞蛋白C受体等,主要灭活凝血因子Ⅴ和Ⅷ等 ...
李正民 +3 more
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Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT To address the demand for high‐temperature stability, broadband strong absorption, and multifunctional integration of electromagnetic wave absorbing materials in complex service environments, lightweight molybdenum disulfide (MoS2) decorated silicon carbide (SiC) nanofiber composite aerogels with a directional layered interconnected structure ...
Zhi Song +4 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2010 目的研究白树花多糖硫酸酯的抗凝血效果及抗凝血机理,为制备合成高效、安全的多糖硫酸酯抗凝剂提供实验依据。方法将可食用的白树花真菌进行发酵,提取水溶性多糖,采用氯磺酸-吡啶法进行硫酸酯化修饰,获得水溶性的白树花多糖硫酸酯。通过测定APTT、TT、凝血因子活性对白树花硫酸酯的抗凝血效果及抗凝血机理进行评估和探讨。结果对正常人血浆进行的抗凝血实验表明,白树花多糖硫酸酯具有明显的抗凝血活性,在520mg/L的浓度下即可发挥效果,在1020mg/L浓度时,相当于15020U肝素的抗凝血效果;抗凝血机理研究结果表明 ...
杨曦明 +4 more
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