Results 11 to 20 of about 28,261 (190)
Rare Metals, EarlyView.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
Rare Metals, EarlyView.ABSTRACT A major challenge in fabricating eutectic NiTiNb alloys is the incomplete melting of Nb due to its much higher melting point than the NiTi matrix. In this work, a novel electron‐beam freeform additive manufacturing strategy is developed to eliminate unmelted Nb particles and achieve a fully eutectic structure through independent dual‐wire ...
Qing‐Da Zhang +9 more
wiley +1 more source
A Study on the Transmitting Mechanism of Financial Risks between Chinese A-share Market and Other Major Asian Stock Markets [PDF]
, 2016 随着经济全球化和亚洲一体化进程的深入，中国与亚洲各个国家和地区的合作取得重大突破，中国在亚洲金融市场的话语权不断提高，承担的责任也越来越大，面临来自亚洲的系统性风险越来越不容忽视。深入研究中国A股与亚洲其他主要股市金融风险的传导机制，对中国的经济发展与金融安全以及跨境资产配置都具有非常重要的理论与现实意义。 为了揭示中国A股与亚洲其他主要股市的风险传导机制，本文从风险传导的“外在”和“内在”两个视角进行研究。在“风险传导的外在表现”方面，本文从整体和局部两个层面进行分析。整体层面上 ...
林琛
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Fermi Surface Structure Revealed by Quantum Oscillations in Half‐Heusler Semimetal LuAuSn
Rare Metals, EarlyView.ABSTRACT The Fermi surface structure in the half‐Heusler semimetallic compound LuAuSn was systematically investigated using quantum oscillation studies of high‐quality single crystals and first‐principles calculations. Clear bulk quantum oscillation signals were observed for multiple complementary physical properties, including magnetization, Hall ...
Yue Lu +12 more
wiley +1 more source
塔里木沙漠公路防护林土壤微生物生物量与土壤环境因子的关系 [PDF]
, 2009 为探讨极端干旱区风沙土土壤微生物与土壤环境因子的作用规律,采用相关分析法研究了塔里木沙漠公路防护林地土壤微生物生物量与理化因子和酶活性的关系.结果表明:土壤容重和粒径减小(R0.85)时,防护林地中土壤微生物数量和生物量有增大趋势,由容重与微生物量的相关性主导;土壤养分含量与土壤微生物数量和生物量呈正相关,主要由速效养分和放线菌、微生物生物量C、P的相关性所致;土壤酶活性与土壤微生物数量和生物量的相关性差异较大,R在0.51～0.91,主要取决于蔗糖酶、磷酸酶与放线菌、微生物量C的相关 ...
周宏伟 +7 more
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Rare Metals, EarlyView.ABSTRACT This study introduces novel nonequiatomic TiZrCoCrMoCux (x = 0, 5, 10; at%) medium‐entropy alloys (MEAx) tailored for orthopedic implants, synergistically combining the biocompatibility of Ti‐based alloys, the wear resistance of CoCrMo alloys, and the antibacterial/osteogenic attributes of Cu. The alloy's microstructure, mechanical properties,
Hang Yu +9 more
wiley +1 more source
Rare Metals, EarlyView.ABSTRACT Single‐atom catalysis hinges on fundamental challenges in precisely controlling metal‐support interactions and rationally regulating metal–adsorbate relationships. Herein, we report a universal strategy for constructing highly efficient and well‐defined Cu(I) single‐atom catalysts based on a trifurcate AlL3 molecular support.
Donghui Zhang +9 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2005 目的探讨近视患者角膜屈光力与角膜表面对称性的相关关系。方法对近视患者眼1472只（其中男性眼715只,女性眼757只）、行PRK手术后1年的患者眼161只和行LASIK手术后1年的患者眼158只进行统计学分析,研究角膜平均屈光力（ACP）与角膜表面非对称指数（SAI）的相关关系。结果ACP与SAI在男性和女性中均存在明显的正相关关系（Pearson相关系数为分别为0·120、0·108 ...
吴荒, 周跃理, 岳志强, 宋跃
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Zhejiang Daxue xuebao. Lixue ban, 2018 乌药含有呋喃倍半萜、黄酮、生物碱、挥发油等多种化学成分，具有抗氧化、抗肿瘤及抑菌等活性.为研究乌药化学成分的性质，计算了乌药化学成分的分子连接性指数和电性拓扑状态指数，并筛选分子连接性指数中的0X，5X和5Xc，以及电性拓扑状态指数中的E1,E2和E3，将这6种结构指数作为神经网络的输入层变量，色谱保留时间作为输出层变量，做回归分析，采用6：5：1的神经网络结构，构建了预测能力较强的预测模型.该模型总相关系数rt为0.994 0，训练集相关系数为0.992 9，测试集相关系数为0.997 0 ...
DUXihua(堵锡华), WANGChao(王超)
doaj +1 more source
西沙珊瑚鍶溫度計: 便捷高精度海洋古水溫代用指標 [PDF]
, 2001 Strontium concentrations in modem Porites coral from XishaIslands were determined by precise thermal ionization mass spectrometry. The coral skeleton grew in the period from 1976 to 1994.
Lee, T, Nie, BF, Sun, M, Sun, Y
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