Results 41 to 50 of about 11,578 (167)
, 1991 本文应用霍普金森压杆(SHPB)技术对特种钛合金在高加载率下的动态断裂韧性进行了试验研究,并与静态试验结果进行了比较。结果证明,该合金的动态断裂韧性随着加载率的增高而下降 ...
段祝平, 田兰桥
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Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Although magnetic carbon materials possess significant potential in the field of electromagnetic wave absorption (EWA) due to the synergistic effect of multiple attenuation mechanisms, the currently reported magnetic carbon EWA materials face some challenges, such as high cost, low yield, and easy agglomeration of the magnetic component ...
Bo Jiang +9 more
wiley +1 more source
[[alternative]]Study on Bending Property of Bi-Aluminum Matrix Composite with Curved Interface [PDF]
計畫編號：NSC91-2216-E032-003研究期間：200208~200307研究經費：567,000[[sponsorship ...
林清彬
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Preparation and Characterization of Bi and Eu-codoped Y2O3 Phosphor by Wet Chemical Methods [PDF]
, 2009 发光二极管（LED）具有体积小、发热少、耗电低、寿命长、响应速度快、无汞污染、可平面封装等优点。性能优异的荧光粉可有效提高LED的发光效率，铋铕共掺杂氧化钇粉是近几年发展的、有应用潜力的荧光粉。通过分析对比现有的合成方法，发现沉淀法最有可能替代高温固相法制备荧光粉应用于产业化。微波水热法节省能源，可以制备较细粉体。本文首次用微波水热法研究了铋铕共掺杂氧化钇荧光粉的制备和表征，并在此基础上详细研究了沉淀法的制备和表征。本研究用微波水热法和草酸加氨水做沉淀剂制备铋铕共掺杂氧化钇荧光粉，通过DTA/TG ...
王烨文
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Chinese Tourism Areas and Sustainability Strategy Studies [PDF]
, 2010 With the constant development of tourist industry, the scenic spots and their surroundings suffers a severe impact. As a theoretical concept, sustainable development contains quite rich connotation, whose ideas have been raised to kind of philosophical ...
ZHANG, Zhen-jia
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Boron Difluoride Chelated Aminoanthraquinone Photosensitizer for Type I Photodynamic Therapy
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Type I photosensitizers capable of generating cytotoxic reactive oxygen species (ROS), with reduced oxygen dependence under photoirradiation, are regarded as a promising phototherapeutic approach for hypoxic solid tumors. Herein, based on the electron donor of 9‐phenyl‐carbazole (Cz) and the electron acceptor of anthraquinone (AQ ...
Tian Zhang +8 more
wiley +1 more source
Shuitu Baochi Xuebao, 2011 研究不同水肥条件对夏玉米养分吸收及根系活性的影响,解释水肥配合下夏玉米养分吸收规律和根系活跃吸收面积的变化特征.采用管栽试验,研究不同水肥条件对夏玉米不同生育期养分积累特征和根系吸收面积的影响.夏玉米干物质积累量与植株全量N、K的积累量变化趋势基本一致,植株内全量N、K积累量以拔节-大喇叭口阶段最多,P素积累主要集中于抽雄-成熟阶段.不同生育期根系活跃吸收面积与总吸收面积变化均呈单峰式曲线,峰值分别出现在大喇叭口期和抽雄期.在玉米生长季水肥充足条件下 ...
李秀芳, 李淑文, 和亮, 文宏达
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Preparation of Europium-Containing Silicon Oxynitride Phosphor doped by Magnesium with High Quantum Efficiency [PDF]
, 2017 利用聚合物先驱体转化法可以成功制备物化性能稳定、相结构简单的含铕硅基氮氧化物荧光粉，但其量子效率不佳，导致发光强度不够高。适量镁掺杂可以显著提高稀土掺杂碱土金属硅基氮氧化物以及铈掺杂硅基氮氧化物荧光粉的发光性能，但在聚合物先驱体转化法中掺镁对含铕硅基氮氧化物荧光粉的影响尚不清楚，因此有必要探索通过掺镁制备结构简单且具有高量子效率的含铕纯硅基氮氧化物荧光粉。本论文探讨采用聚合物先驱体转化法，以聚碳硅烷、乙酰丙酮铕和乙酰丙酮镁为原料来制备高量子效率的掺镁含铕硅基氮氧化物荧光粉。结合元素分析、XRD ...
邱江林
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Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Weakening the electrostatic attraction between Mg2+ ions and H− ions in MgH2 is vital for improving the kinetic performance of MgH2 for hydrogen storage. Herein, a multivalent microenvironment is synergistically created by Mn and Mg2Ni to break the stable structure of MgH2, enabling rapid and stable de/hydrogenation performance.
Ya‐Ke Wu +7 more
wiley +1 more source
Dianci bileiqi, 2015 针对ZnO压敏电阻多片并联时能量吸收的问题,基于全能量分析法,通过改变ZnO压敏电阻的并联片数及压敏电压的大小,对多片并联的ZnO压敏电阻进行8/20μs波形冲击试验,可以得出以下结论:多片压敏电阻并联时,各片压敏电阻的吸收能量随着冲击电压的上升而呈现线性增长的趋势,且压敏电阻相互间的压敏电压越接近,吸收能量越均匀,该现象可以由空穴诱导隧道击穿理论解释;能量吸收比随着冲击电压的增加呈现出线性递减的趋势,从能量释放角度证明了多片并联的压敏电阻可以有效保护后级设备,对实际应用具有一定的参考价值意义。
李祥超 +5 more
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