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Corrosion Types of Magnesium Alloys
[chapter]
2018
Magnesium Alloys - Selected Issue
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Magnesium (Mg) alloys are susceptible to corrosion in aggressive environments. Corrosion of Mg alloys depends greatly on their composition and microstructure (grain size, the size, shape and distribution of second phases), post-processing and media. In most cases, localized corrosion, such as pitting corrosion and filiform corrosion, generally occurs due to microgalvanic corrosion between the intermetallic compounds and their neighboring α-Mg matrix. However, open literature reported that
doi:10.5772/intechopen.80083
fatcat:4ge6ihhkizhnhklefzkzjypoqq
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... l corrosion morphologies, that is, intergranular corrosion (IGC) and exfoliation corrosion (EFC), cannot appear on Mg alloys. In this chapter, all typical corrosion modes of Mg alloys and influencing factors are introduced, including general corrosion, galvanic corrosion, pitting corrosion, filiform corrosion, IGC, EFC, stress corrosion cracking (SCC), corrosion fatigue (CF) and so on. The focus is laid on pitting corrosion and EFC. Corrosion mechanisms of Mg alloys are also discussed. sion fatigue (CF) and erosion corrosion. EFC and crevice corrosion, however, have been rarely reported. Corrosion form is fundamentally influenced by metallurgical factors such as chemical composition, grain size and shapes, size, shape and distribution of secondary phases or intermetallic compound particles, inclusions, solute-aggregated grain boundaries (GBs), crystallographic orientations and dislocation density. Moreover, post-processing (i.e., extrusion and rolling) and post heat-treatment (i.e., T4, T5 and T6) exert a significant impact on corrosion mechanism.
Silicon Nanocrystals
[chapter]
2011
Crystalline Silicon - Properties and Uses
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How to reference In order to correctly reference this scholarly work, feel free to copy and paste the following: Hong Yu, Jie-Qiong Zeng and Zheng-Rong Qiu (2011). ...
doi:10.5772/22015
fatcat:p3v7kvfi2ve7zoi3e2ccmcjwzm
Investigation of PNN-PZT Thick Films Fabricated by Electrophoretic Deposition
2012
Journal of Inorganic Materials
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Evaluation model for robustness of digital watermarking
2010
Wuli xuebao
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In vitro degradation of pure magnesium―the synergetic influences of glucose and albumin
2020
Bioactive Materials
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Mei-Qi Zeng: Visualization, Investigation. Zhao-Qi Zhang: Software. Zheng-Zheng Yin: Software, Validation. Lan-Yue Cui: Conceptualization, Methodology. Rong-Chang Zeng: Visualization, Validation. ...
Zeng et al. [55] found that changes in glucose concentration may cause changes in the interface microenvironment of implanted metal materials in the human body. ...
doi:10.1016/j.bioactmat.2020.02.015
pmid:32181417
pmcid:PMC7063336
fatcat:kmzmpjxskbcopm4kxfzaacwz5i
Advances in coatings on biodegradable magnesium alloys
2020
Journal of Magnesium and Alloys
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Zeng et al. ...
Zeng et al. ...
doi:10.1016/j.jma.2019.09.008
fatcat:g77y5hwnxbbi5alz5yncbu6iae
Hypoxia, stem cells and bone tumor
2011
Cancer Letters
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Normal oxygen level is critical for niches that together with other components of the niche play vital role in regulating stem or tumor cells behavior. Hypoxia plays an important role in normal development and disease progression, including the growth of solid tumors. The hypoxia inducible factors (HIFs) are the key mediators of the cellular response to hypoxia. In this review, we focused on the role of HIFs on bone tumor formation. Further, we also emphasized how hypoxia, stem cells, and its niches regulate the bone tumorigenesis.
doi:10.1016/j.canlet.2011.09.023
pmid:21999934
pmcid:PMC3215823
fatcat:l4axwcvwpbfi7aebszgrnvtyi4
Scale Up Event Extraction Learning via Automatic Training Data Generation
[article]
2017
arXiv
pre-print
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Recent studies (Mintz et al. 2009; Zeng et al. 2015) have demonstrated its effectiveness in various NLP tasks. ...
arXiv:1712.03665v1
fatcat:hize7tvvjjggtogxxiba4iq324
Friend or Foe? Flipped Classroom for Undergraduate Electrocardiogram Learning: a Randomized Controlled Study
2017
BMC Medical Education
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But all of the datasets are available from Zeng Rui and the corresponding author on reasonable request and under the agreements of the students and teachers. ...
doi:10.1186/s12909-017-0881-8
pmid:28270204
pmcid:PMC5341445
fatcat:forvpu2nczbmzpt5xng3wxldea
Endovascular stenting for extracranial carotid artery aneurysms
2016
Medicine
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The aim of this study was to investigate the safety and effectiveness of endovascular stenting for extracranial carotid artery aneurysms (ECAAs) and evaluate the mid-term outcomes. Twelve consecutive symptomatic patients (mean age 43.8 ± 14.9 years; 8 men) with ECAAs who were treated with endovascular stenting between 1997 and 2015 were retrospectively analyzed. Clinical follow-up data including symptoms and neurological events were obtained from outpatient records. Imaging follow-up with
doi:10.1097/md.0000000000005442
pmid:27861392
pmcid:PMC5120949
fatcat:7fqakvkh4vhgbjrxwwa3oat7em
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... ultrasound and/or computed tomographic angiography (CTA) was performed to examine the aneurysm obliteration and patency of the stents at 3, 6, 12 months and yearly thereafter. A total of 5 true aneurysms and 7 pseudoaneurysms were included in our series. Neurological symptoms (n = 5, 41.7%) and a pulsatile neck mass (n = 5, 41.7%) were the most common presenting symptoms. Endovascular stenting procedures were technically successful in all cases; 3 patients received bare stents, and 9 patients received covered stents. No perioperative neurologic or cardiopulmonary complications occurred. Over a period of follow-ups (mean 21.8 ± 25.1 months), all patients were alive and free from neurological or other adverse events. All aneurysms were completely excluded except for 1 patient who was exposed to a residual medium leaking into the aneurysm sac. No reintervention was performed in this specific patient because aneurysm growth or significant clinical symptoms did not occur. Recurrent restenosis assessed by CTA imaging at 12 months occurred in 1 (8.3%) patient in our series. Target lesion revascularization for this hemodynamic restenosis was treated with placement of an additional stent. In our series, endovascular stenting for ECAAs was found to be safe, effective, and proved to have promising mid-term results. Although long-term results need to be further explored, advantages including less procedure-related complications and a shorter recovery time make endovascular stenting an attractive option for ECAAs, especially for the patients who are unfit for traditional open surgery.
WiCop: Engineering WiFi Temporal White-Spaces for Safe Operations of Wireless Personal Area Networks in Medical Applications
2014
IEEE Transactions on Mobile Computing
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Rong Zheng is currently with Dept. of Computer Science, University Radio Frequency (RF) bands. ...
doi:10.1109/tmc.2013.31
fatcat:22ewpmgijfa5llu46cynytn7eq
WiCop: Engineering WiFi Temporal White-Spaces for Safe Operations of Wireless Body Area Networks in Medical Applications
2011
2011 IEEE 32nd Real-Time Systems Symposium
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Zheng is also supported in part by the HK PolyU Department of Computing Sabbatical Visitor Program. We thank Prof. P. R. Kumar, Prof. Lui Sha, and Prof. ...
doi:10.1109/rtss.2011.23
dblp:conf/rtss/WangWZZZ11
fatcat:54vad26535cnjkmlpww32czw7y
Study of detection times for liver stiffness evaluation by shear wave elastography
2014
World Journal of Gastroenterology
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AIM: To investigate enough valid measurements (VMs) to assess liver fibrosis in chronic hepatitis B patients (CHB). METHODS: One hundred and twelve CHB patients (25 women, 87 men) with a mean age of 38.43 years received liver stiffness evaluations using real-time shear wave elastography for 10 VMs. All patients underwent liver biopsy. Based on the biopsy pathology, the liver stiffness data obtained from different VMs (1, 2, 3, 5 and 10 times) were compared for the evaluation of liver fibrosis.
doi:10.3748/wjg.v20.i28.9578
pmid:25071355
pmcid:PMC4110592
fatcat:gtyj3nk7t5bujasd7mssgxlgtq
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... he correlation between the elastic modulus means of the liver obtained from different VMs of detection at each pathological stage was analysed. The receiver operating characteristic (ROC) curve was employed to determine the diagnostic performance of different VMs of detection, and the areas under the ROC curve of different groups were compared. RESULTS: The liver stiffness values obtained from 1 VM, 2 VMs, 3 VMs, 5 VMs and all 10 VMs for stage F0 were 6.95 ± 2.01 kPa, 6.87 ± 1.83 kPa, 6.90 ± 1.88 kPa, 6.95 ± 1.93 kPa and 7.15 ± 1.89 kPa, respectively (F = 0.043, P = CLINICAL TRIALS STUDY 9578 July 28, 2014|Volume 20|Issue 28| WJG|www.wjgnet.com
Similarity spreading
2004
Proceedings of the 13th international World Wide Web conference on Alternate track papers & posters - WWW Alt. '04
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In many Web search applications, similarities between objects of one type (say, queries) can be affected by the similarities between their interrelated objects of another type (say, Web pages), and vice versa. We propose a novel framework called similarity spreading to take account of the interrelationship and improve the similarity calculation. Experiment results show that the proposed framework can significantly improve the accuracy of the similarity measurement of the objects in a search engine.
doi:10.1145/1013367.1013525
dblp:conf/www/XueZCMY04
fatcat:xi45ccv5mvexnd6hxd4xy3ctmq
4-[3-(4-Nitrophenoxy)propoxy]aniline
2008
Acta Crystallographica Section E
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E64, o2110 [doi:10.1107/S1600536808032406]
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4-[3-(4-Nitrophenoxy)propoxy]aniline Li-Mei Zheng, Xian Wei, Xiao-Rong Peng ...
, Jin-Ping Zeng and Yun-Qian Zhang S1. ...
doi:10.1107/s1600536808032406
pmid:21580974
pmcid:PMC2959529
fatcat:etqk4j7rkvc37eyt5mxtpdq2qe
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