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Mechanical stress in high-temperature superconducting ring-shaped bulk during the pulsed-field magnetization

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Science China(Technological Sciences) 2023年第2期66卷 574-585页

作者： WANG lan wu HaoWei YONG HuaDong Key Laboratory of Mechanics on Disaster and Environment in Western China Ministry of EducationLanzhou UniversityLanzhou 730000China Department of Mechanics and Engineering Sciences College of Civil Engineering and MechanicsLanzhou UniversityLanzhou 730000China School of Science Lanzhou University of TechnologyLanzhou 730050China

The high-temperature superconducting(HTS)bulk has a higher critical current density and can trap the larger magnetic *** the high-temperature superconducting bulk is magnetized by the pulsed-field,it will be subjected to electromagnetic stress and thermal ***,the bulk may be damaged under larger mechanical stress or strain during the pulsed-field *** this paper,the electromagnetic field,the temperature and the mechanical response of the ring-shaped bulk are simulated based on the electromagnetic and mechanical governing equations,and the simulated trapped field is consistent with the experimental results given in the *** stress distribution on the top surface of the ring-shaped bulk during pulsedfield magnetization is opposite to the case of field cold ***,the inner edge on the middle plane of the bulk may be broken more easily than the outer edge during the pulsed-field ***,the influences of the size of the inner radius,ambient temperature and rise time of the applied field are ***,the mechanical stress of the bulk with the cooling process is investigated,and the tensile stress on the surface can be enhanced by the cooling process.

关键词： ring-shaped superconducting bulk cooling process trapped field thermal stress electromagnetic stress

Ex-PRESS implantation with phacoemulsification in POAG versus CPACG

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International Journal of Ophthalmology(English edition) 2017年第1期10卷 51-55页

作者： Jie lan Da-Peng Sun Jie wu ya-Ni Wang Li-Xin Xie Qingdao University Medical College Qingdao 266071Shandong ProvinceChina Qingdao Eye Hospital Shandong Eye InstituteShandongAcademy of Medical SciencesQingdao 266071Shandong ProvinceChina

AIM： To compare the long-term outcomes of the Ex-PRESS miniature glaucoma device implanted under a scleral flap in combination of phacoemulsification with intraocular lens implantation in primary open angle glaucoma （POAG） and chronic primary angle-closure glaucoma （CPACG）.METHODS： Retrospective, comparative study. A total of 60 eyes （60 patients） receiving the Ex-PRESS miniature glaucoma device implantation combined with phacoemulsification were reviewed. Thirty eyes （30 patients） had the combined procedures for POAG, and the other 30 eyes （30 patients） for CPACG. RESULTS： The follow-up was 39.37±7.09mo （range 3 to 49mo） in patients with POAG and 37.10±9.26mo （range 9 to 49mo） in patients with CPACG （P=0.29）. The mean change in best corrected visual acuity was 0.41 logMAR for POAG and 0.38 logMAR for CPACG at the last follow-up （P=0.22）. The postoperative intraocular pressure （IOP） of the POAG group was significantly lower than the CPACG group at 1, 3, 12, and 18mo after surgery （P=0.02, 0.00, 0.04, 0.01） with similar glaucoma medications after surgery （P〉0.16）. At 3y after surgery, the cumulative complete and qualified success rates were 63.3% （POAG） and 53.3% （CPACG）, 83.3% （POAG） and 73.3% （CPACG）（P=0.41, 0.49）, respectively. The POAG group had more hypotony than the CPACG group （P=0.04）.CONCLUSION： The long-term outcomes show the Ex-PRESS implantation combined with phacoemulcification can effectively lower the IOP in both the POAG and CPACG groups. The POAG group seems to have lower postoperative IOP and a higher risk of hypotony.

关键词： glaucoma Ex-PRESS miniature glaucomadevice cataract surgery phacoemulsification

Crystalline Size Effects on Texture Coefficient,Electrical and Optical Properties of Sputter-deposited Ga-doped ZnO Thin Films

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Journal of Materials Science & Technology 2015年第2期31卷 175-181页

作者： yaqin Wang wu Tang lan Zhang State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University

C-axis oriented Ga-doped ZnO(GZO) films with various thicknesses were deposited on glass substrate by radio frequency(RF) magnetron sputtering. The dependence of crystal structure,electrical,and optical properties of the GZO films on crystalline size were systematically studied. The results showed that the texture coefficient of (002) peak (TC(002)) decreases with increasing crystalline size. The Hall mobility m was reciprocal to electron effective mass and the fitted relaxation time s was 0.11±0.01 ms. With the increase of average crystalline size,the resistivity increased slightly,which is caused by the competition of (002) and(101) plane,introducing in some defects and leading to carrier density reduction. The optical band gap was in the range from 3.454 to 3.319 eV with increasing crystalline size from 26.96 to 30.88 nm,showing a negative relationship. The dependence of optical band gap (Eopg) on the crystalline size(R) can be qualitatively explained by a quantum confinement effect. The relationship between Eopg and R of GZO films suggests that tuning up optical properties for desired applications can be achieved by controlling the crystalline size.

关键词： Ga-doped ZnO film Crystalline size Texture coeffic

Prevention of DNA re-replication in eukaryotic cells

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Journal of Molecular Cell Biology 2011年第1期3卷 13-22页

作者： lan N.Truong Xiaohua wu Department of Molecular and Experimental Medicine The Scripps Research InstituteLa JollaCA 92037USA

DNA replication is a highly regulated process involving a number of licensing and replication factors that function in a carefully orchestrated manner to faithfully replicate DNA during every cell *** of proper licensing control leads to deregulated DNA replication including DNA re-replication,which can cause genome instability and *** organisms have established several conserved mechanisms to prevent DNA re-replication and to counteract its potentially harmful *** mechanisms include tightly controlled regulation of licensing factors and activation of cell cycle and DNA damage *** licensing control and its associated compromised checkpoints have both been observed in tumor cells,indicating that proper functioning of these pathways is essential for maintaining genome *** this review,we discuss the regulatory mechanisms of licensing control,the deleterious consequences when both licensing and checkpoints are compromised,and present possible mechanisms to prevent re-replication in order to maintain genome stability.

关键词： DNA re-replication cell cycle checkpoints DNA damage response Cdt1 DSB repair genome stability tumorigenesis

基于CNN和Transformer交叉教学的半监督医学图像分割

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陕西科技大学学报 2025年第1期43卷 185-192页

作者：杨云胡雯青杨虹吴亚男陕西科技大学电子信息与人工智能学院陕西西安710021 西安富德医疗电子有限公司陕西西安710075 西安计量技术研究院陕西西安710199

由于医学图像分割领域缺乏高质量的标注数据,半监督学习方法在医学图像语义分割任务中受到高度重视.为了充分利用卷积神经网络(Convolutional Neural Network,CNN)和Transformer在半监督学习中的优势,本文提出一种基于CNN与Transformer... 详细信息

由于医学图像分割领域缺乏高质量的标注数据,半监督学习方法在医学图像语义分割任务中受到高度重视.为了充分利用卷积神经网络(Convolutional Neural Network,CNN)和Transformer在半监督学习中的优势,本文提出一种基于CNN与Transformer交叉教学的半监督医学图像分割方法.该方法将经典的深度协同训练从一致性正则化简化为交叉教学,利用循环伪标签方案使两个网络的预测差异转换为无监督损失,以鼓励两个网络具有一致的低熵预测.所提方法在ISIC 2018数据集上进行实验,在采用20%的标注比例时,Dice系数和Jaccard系数分别达到87.25%和79.17%,相比于监督U-Net++的训练结果分别提升了2.89%和3.53%,并且优于目前主流的半监督学习方法,验证了所提方法在半监督医学图像分割上的有效性和泛化性.

关键词：半监督学习图像语义分割交叉教学循环伪标签

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Software crowdsourcing for developing Software-as-a-Service

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Frontiers of Computer Science 2015年第4期9卷 554-565页

作者： Xiaolan XU Wenjun wu ya WANG Yuchuan wu Chinese Institute of Electronics Beijing 100036 China State Key Laboratory of Software Development Environment Beihang University Beijing 100191 China School of Software Engineering Beihang University Beijing 100191 China

Recently software crowdsourcing has become a viable development paradigm for Software-as-a-Service （SaaS） ecosystems. TopCoder, one of the largest competi- tive programming communities, enables enterprises to tap into its global talent pool and crowdsource a variety of SaaS development tasks including requirement analysis, architec- ture design, code, and testing. Many researchers have pro- posed auction-based modelling methods to characterize gen- eral software crowdsourcing. But there are few papers on the comprehensive analysis of SaaS crowdsourcing process and developer community. This paper introduces a holistic analysis framework to model the SaaS-oriented software crowdsourcing from two dimensions： individual behavior in crowdsourcing contests and collective competition in the community. The framework includes a game-theoretical model to describe the compet- itive nature of software crowdsourcing process. Moreover, the framework defines a competition network to characterize the topological properties of a crowdsourcing community for SaaS development. The analysis of this model indicates that the success of a competitive software crowdsourcing project essentially depends upon the networks of key participants with sufficient skills and dedication for the project. This is validated by a large historical data collected from the Top- Coder website over a ten-year period.

关键词： SaaS Software Crowdsourcing TopCoder

Poisoning the pika： must protection of grasslands be at the expense of biodiversity？

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Science China(Life Sciences) 2017年第5期60卷 545-547页

作者： lan wu Hao Wang Center for Nature and Society School of Life Sciences Peking University Beijing 100871 China

The plateau pika（Ochotona curzoniae）plays a keystone role in the grassland ecosystem on the Qinghai-Tibetan Plateau（QTP）（Smith and Foggin,1999;Lai and Smith,2003）,but in spite of its ecological importance it has... 详细信息

关键词：国家级自然保护区高原鼠兔生物多样性中毒草地生态系统草原青藏高原噪声比

Synthesis,Structure and Luminescence of Zn_(4.5)Cu_3 Heteronuclear Coordination Polymer Comprising Macrocyclic Oxamide and 5-Sulfosalicylic Ion

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Chemical Research in Chinese Universities 2010年第4期26卷 501-504页

作者： SUN ya-qiu WANG Jing FAN lan-lan GAO Dong-zhao Tianjin Key Laboratory of Structure and Performance for Functional Molecule College of Chemistry and Life Science Tianjin Normal University Tianjin 300387 P. R. China

The complex [Zn4.5（SSA）3（CuL）3（H2O）6]n was synthesized and structurally determined, where SSA is fully deprotonated 5-sulfosalicylic acid（CuL, H2L=2,3-dioxo-5,6,14,15-dibenzo-1,4,8,12-tetraazacyclo-pentadeca- 7,13-dien）. The title complex crystallized in the triclinic system with space group P1^-, a=1.19788（17） nm, b=1.4253（2） nm, c=2.2890（4） nm, α=90.211（2）°, ,β=93.076（2）°, γ=90.600（2）°. The complex displayed a 1D ladderlike chain. All these 1D chains were further interlinked via hydrogen bonds, resulting in a 2D architecture. The luminescent property of the compound was also discussed.

关键词： Heteronuclear complex Macrocyclic oxamide Luminescence

Proper Biharmonic Submanifolds in a Sphere

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Acta Mathematica Sinica,English Series 2012年第1期28卷 205-218页

作者： Xian Feng WANG lan wu School of Mathematical Sciences and LPMC Nankai UniversityTianjin 300071P.R.China Department of Mathematics Renmin University of ChinaBeijing 100872P.R.China

In this paper, we obtain a constraint of the mean curvature for proper biharmonic submanifolds in a sphere. We give some characterizations of some proper biharmonic submanifolds with parallel mean curvature vector in ... 详细信息

关键词： Proper biharmonic map parallel mean curvature vector mean curvature