Results 1 to 10 of about 1,065 (99)
Rare Metals, Volume 42, Issue 9, Page 3114-3129, September 2023., 2023 Graphic Abstract Abstract Electrochemical tests and surface analysis were applied to study the corrosion behavior and passive film characteristics of three‐dimensional‐printed NiTi shape memory alloys fabricated by laser‐powder bed fusion (L‐PBF) in artificial saliva at 37 °C. The passivity of L‐PBF NiTi shows to be influenced by the process parameters
Ming Liu +5 more
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Journal of Traumatic Stress, Volume 36, Issue 4, Page 738-749, August 2023., 2023 Abstract We investigated whether the impact of potentially traumatic events (PTEs) on trauma‐related symptoms changes across the transitional adult lifespan (i.e., 16–100 years old) and if this association differs for self‐reported COVID‐19–related PTEs compared to other PTEs.
Demi C. D. Havermans +13 more
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Inactivation Kinetics of Polyphenol Oxidase of Fresh-cut Apple by Ultrasonic Treatment(超声处理钝化鲜切苹果多酚氧化酶动力学研究) [PDF]
Shipin kexue jishu xuebao, 2015 The effects of ultrasonic treatment on inactivation of polyphenol oxidase (PPO) activity of fresh-cut apple were investigated, and inactivation kinetics of PPO was analyzed by using a first-order reaction kinetic under the following experimental ...
YANG Mingguan(杨明冠) +2 more
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Relation Extraction Based on Fusion Dependency Parsing from Chinese EMRs
Scientific Programming, Volume 2020, Issue 1, 2020., 2020 The Electronic Medical Record (EMR) contains a great deal of medical knowledge related to patients, which has been widely used in the construction of medical knowledge graphs. Previous studies mainly focus on the features based on surface semantics of EMRs for relation extraction, such as contextual feature, but the features of sentence structure in ...
Pengjun Zhai +4 more
wiley +1 more source
Gongye shui chuli, 2021 研究了一种次氯酸钠辅助的循环冷却水无磷钝化方案。结果表明，适量的余氯能改善钝化过程。随着余氯从0增加至0.5 mg/L，碳钢表面逐渐形成均匀致密的蓝色保护膜，红点出现时间从5 s增加至30 s，电化学测量的碳钢在冷却水中的实时腐蚀率从0.1 mm/a降低至0.005 mm/a；而过量的余氯会导致腐蚀。对比传统的含磷钝化，其显著优势是药剂投加量低，成膜时间短，钝化后可直接切换至正常运行阶段，现场操作更方便。
杨恒修, 沈虎峻, 邹雪锋
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Gongye shui chuli, 1992 对于高压及以上大容量锅炉广泛采用化学清洗法除垢,钝化是该工艺中关键的一步。本文论述了钝化剂、钝化工艺、钝化膜的膜质检验及钝化废液处理,并分析了不同钝化剂的优缺点。
李兴
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Shuitu Baochi Xuebao, 2023 生物炭的性质与老化作用是影响生物炭钝化修复Cd污染土壤效果的重要因素。比较研究4种不同原料生物炭(污泥类、秸秆类、动禽粪便类和木本类)对Cd2+吸附作用和Cd污染土壤的钝化修复效果的差异。结果表明:施用生物炭显著提升土壤孔隙水pH(棕榈丝生物炭除外),降低孔隙水DOC和Cd浓度,从而减少水稻根系对孔隙水中Cd的吸收。同时,4种生物炭提高土壤pH,降低土壤有效态Cd、水稻根系和籽粒Cd含量。老化作用减弱稻秆生物炭的钝化效果,显著增强棕榈丝生物炭对土壤Cd的钝化作用,然而 ...
周宽 +4 more
doaj
Shuitu Baochi Xuebao, 2023 为针对性、定量化地利用钝化处理实现不同类型Cd污染土壤的安全利用,以四川盆地6种主要旱作土壤为研究对象,采用室内培养试验和土培试验探讨了6个剂量水平下,钙质钝化材料对土壤pH、CEC、有效Cd含量、Cd形态、小白菜生物量和Cd含量的影响。结果表明:(1)钙质钝化材料可提升6种土壤的pH和CEC,土壤CEC随用量的增加而持续增加,而土壤pH在提升至微碱性水平后,不再随用量的增加而增加;(2)6种土壤有效Cd含量随钝化材料用量的增加先显著降低,后趋于平稳,用量＞2.5%后均无显著变化。该添加量下 ...
陈兰 +4 more
doaj
From demonstrative to definite and beyond: the case of nage in spoken Taiwan Mandarin
Faits de Langues, 2014 When demonstrative pronouns undergo grammaticalization, they have regularly been shown to evolve into definite or specific articles (Lehmann 2002, De Mulder & Carlier 2001). In a synchronic perspective, it has also been shown that for some languages, demonstrative determiners are not restricted to deictic or anaphoric functions, but may extend their ...
openaire +3 more sources
Gongye shui chuli, 1985 目前,国内外大型火电厂高压锅炉化学清洗后,均需进行钝化处理。钝化剂多选用亚硝酸钠。废钝化液中含有一定量的亚硝酸根。众所周知,亚硝酸根为致癌物 ...
李兴
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