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Corrosion Types of Magnesium Alloys [chapter]

Rong-Chang Zeng, Zheng-Zheng Yin, Xiao-Bo Chen, Dao-Kui Xu
2018 Magnesium Alloys - Selected Issue  
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
more » ... 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.
doi:10.5772/intechopen.80083 fatcat:4ge6ihhkizhnhklefzkzjypoqq

Silicon Nanocrystals [chapter]

Hong Yu, Jie-Qiong Zeng, Zheng-Rong Qiu
2011 Crystalline Silicon - Properties and Uses  
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

Jian-Ping LU, Guo-Rong LI, Liao-Ying ZHENG, Jiang-Tao ZENG, Hua-Rong ZENG, Jian-Jiang BIAN
2012 Journal of Inorganic Materials  
doi:10.3724/sp.j.1077.2012.00379 fatcat:jh2bzb4ddzha3cenxbtidh23qe

Evaluation model for robustness of digital watermarking

Zeng Gao-Rong, Qiu Zheng-Ding
2010 Wuli xuebao  
doi:10.7498/aps.59.5870 fatcat:iz2pz27itbdvbiajatcns35phu

In vitro degradation of pure magnesium―the synergetic influences of glucose and albumin

Wei Yan, Yi-Jie Lian, Zhi-Yuan Zhang, Mei-Qi Zeng, Zhao-Qi Zhang, Zheng-Zheng Yin, Lan-Yue Cui, Rong-Chang Zeng
2020 Bioactive Materials  
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

Zheng-Zheng Yin, Wei-Chen Qi, Rong-Chang Zeng, Xiao-Bo Chen, Chang-Dong Gu, Shao-Kang Guan, Yu-Feng Zheng
2020 Journal of Magnesium and Alloys  
Zeng et al.  ...  Zeng et al.  ... 
doi:10.1016/j.jma.2019.09.008 fatcat:g77y5hwnxbbi5alz5yncbu6iae

Hypoxia, stem cells and bone tumor

Wen Zeng, Rong Wan, Yuehuan Zheng, Shree Ram Singh, Yiyong Wei
2011 Cancer Letters  
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]

Ying Zeng, Yansong Feng, Rong Ma, Zheng Wang, Rui Yan, Chongde Shi, Dongyan Zhao
2017 arXiv   pre-print
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

Zeng Rui, Xiang Lian-rui, Yue Rong-zheng, Zeng Jing, Wan Xue-hong, Zuo Chuan
2017 BMC Medical Education  
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

Leng Ni, Zuo Pu, Rong Zeng, Rui Zhang, Yue-hong Zheng, Wei Ye, Chang-Wei Liu
2016 Medicine  
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
more » ... 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.
doi:10.1097/md.0000000000005442 pmid:27861392 pmcid:PMC5120949 fatcat:7fqakvkh4vhgbjrxwwa3oat7em

WiCop: Engineering WiFi Temporal White-Spaces for Safe Operations of Wireless Personal Area Networks in Medical Applications

Yufei Wang, Qixin Wang, Guanbo Zheng, Zheng Zeng, Rong Zheng, Qian Zhang
2014 IEEE Transactions on Mobile Computing  
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

Yufei Wang, Qixin Wang, Zheng Zeng, Guanbo Zheng, Rong Zheng
2011 2011 IEEE 32nd Real-Time Systems Symposium  
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

Ze-Ping Huang, Xin-Ling Zhang, Jie Zeng, Jian Zheng, Ping Wang, Rong-Qin Zheng
2014 World Journal of Gastroenterology  
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.
more » ... 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|
doi:10.3748/wjg.v20.i28.9578 pmid:25071355 pmcid:PMC4110592 fatcat:gtyj3nk7t5bujasd7mssgxlgtq

Similarity spreading

Gui-Rong Xue, Hua-Jun Zeng, Zheng Chen, Wei-Ying Ma, Yong Yu
2004 Proceedings of the 13th international World Wide Web conference on Alternate track papers & posters - WWW Alt. '04  
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


Li-Mei Zheng, Xian Wei, Xiao-Rong Peng, Jin-Ping Zeng, Yun-Qian Zhang
2008 Acta Crystallographica Section E  
E64, o2110 [doi:10.1107/S1600536808032406] Related literature D-HÁ Á ÁA D -H HÁ Á ÁA D Á Á ÁA D -HÁ Á ÁA N2-H2BÁ Á ÁO1 i 0. 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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