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Preparation and Characterization of CeO_2/YSZ/CeO_2 Buffer Layers for YBCO Coated Conductors

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Journal of Materials Science & Technology 2007年第4期23卷 457-460页

作者： Jie XIONG Yin chen yang qiu Bowan TAO Wenfeng QIN Xumei CUI Yanrong LI State Key Lab of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu 610054 China

CeO2 seed layer was deposited on rolling-assisted biaxially textured metal substrates by direct-current （DC） magnetron reactive sputtering. The effect of deposition temperature on epitaxial orientation of CeO2 thin films was examined. High quality CeO2 layers were achieved at deposition temperature from 750℃ to 850℃.Subsequently yttria-stabilized zirconia （YSZ） and CeO2 films were deposited to complete the buffer layer structure via the same process. The best samples exhibited a highly biaxial texture, as indicated by FWHM （full width half maximum） values in the range of 4°-5°, and 2°-4° for in-plane and out-of-plane orientations,respectively. Secondary ion mass spectrometer analysis confirmed the effective prevention of buffer layer against Ni and W metal interdiffusion. Atomic force microscope observations revealed a smooth, dense and crack-free surface morphology, which provided themselves as the good buffer structure to the YBa2Cu3O7-δ（YBCO） coated conductors.

关键词： Buffer Direct-current magnetron reactive sputtering Coated conductors RABiTS

Texture development and properties of Ti-IF steels produced by different hot-rolling processes

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Journal of Iron and Steel Research International 2019年第3期26卷 310-320页

作者： Lei-lei Hao Lang Li chen-yang qiu Jian-gong Wang Xun Zhou Yong-lin Kang School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Shougang Jingtang United Iron and Steel Co. Ltd.Tangshan 063200HebeiChina

Texture is a pivotal factor for the deep drawability of interstitial free steel (IF steel). The evolution of microstructure and recrystallization texture of Ti-IF steel through the processing of hot rolling, cold rolling and annealing have been studied. The mechanical properties including strain hardening index n and plastic strain ratio r are also measured. For comparison, ferrite rolling and austenite rolling are both studied. The results show that the intensity of γ-fiber after ferrite rolling is higher than that after austenite rolling. The great balance between the {111}〈110〉 and {111}〈112〉 leads to low △r value after annealing. The size of precipitates in ferrite rolled sample is generally larger than that in austenite rolled sample. Compared to austenite rolled sample, the ferrite rolled and annealed one has better formability and its r value reaches 2.36. Different from laboratory production, the test steels were acquired from industrial trial, and all the result can be used in industrial production directly.

关键词： Ti-IF steel Ferrite rolling Austenite rolling Microstructure Texture

Effect of continuous annealing temperature on microstructure and properties of ferritic rolled interstitial-free steel

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International Journal of Minerals,Metallurgy and Materials 2018年第5期25卷 536-546页

作者： chen-yang qiu Lang Li Lei-lei Hao Jian-gong Wang Xun Zhou Yong-lin Kang School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Shougang Jingtang United Iron and Steel Co.Ltd. Tangshan 063200China 不详

In this report,the microstructure,mechanical properties,and textures of warm rolled interstitial-free steel annealed at four different temperatures(730,760,790,and 820°C)were *** overall structural features of specimens were investigated by optical microscopy,and the textures were measured by X-ray diffraction(XRD).Nano-sized precipitates were then observed by a transmission electron microscope(TEM)on carbon extraction *** to the results,with increased annealing temperatures,the ferrite grains grew;in addition,the sizes of Ti_4C_2S_2 and Ti C precipitates also ***,the sizes of Ti N and Ti S precipitates slightly *** the annealing temperature increased from 730 to 820°C,the yield strength(YS)and the ultimate tensile strength(UTS)showed a decreasing ***,elongation and the strain harden exponent(n value)increased to 49.6%and 0.34,*** comparing textures annealed at different temperatures,the intensity of{111}texture annealed at 820°C was the largest,while the difference between the intensity of{111}and{111}was the smallest when the annealing temperature was 820°***,the plastic strain ratio(r value)annealed at 820°C was the highest.

关键词： interstitial-free steel warm rolling texture mechanical properties microstructure

Body-force modeling considering induced upstream effects for a transonic compressor with total temperature distortion

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Chinese Journal of Aeronautics 2024年第6期37卷 7-19页

作者： Jiahui qiu chen yang Wenqiang ZHANG Min ZHANG Juan DU Digital Twin Research Center Institute of Engineering ThermophysicsChinese Academy of SciencesBeijing 100190China School of Engineering and Science University of Chinese Academy of SciencesBeijing 100190China National Key Laboratory of Science and Technology on Advanced Light-duty Gas-turbine Chinese Academy of SciencesBeijing 100190China School of Mechatronical Engineering Beijing Institute of TechnologyBeijing 100081China

To numerically study the impact of total temperature distortion on a transonic compressor with reduced computational costs,a Body-Force Model(BFM)is ***,the interactions between the distorted flow and the compressor are analyzed using full-annulus Unsteady Reynolds-Averaged Navier-Stokes(URANS)results and the orbit *** is found that the induced swirl distortion and the mass flux nonuniformity are intensified in the compressor upstream flow field.A correction factor is thus added to the BFM to account for the effect of the induced swirl,which is crucial for the accurate representation of distortion transfer in the ***,steady simulations with large-amplitude 180circumferential total temperature distortion are performed using the developed *** is shown that the distorted compressor map simulated with the BFM matches well with URANS *** circumferential phase shift of total temperature and the generation of the additional total pressure distortion across the rotor are in line with the time-averaged URANS flow *** compressor upstream effects on the distorted inflow can also be exactly *** above-mentioned results demonstrate the BFM developed in this paper can effectively capture the distorted flow features inside the compressor,and significantly reduce the computational costs by five orders of magnitude compared with URANS.

关键词： Upstream effect Orbit method Induced swirl distortion Body force model Correction factor Time-averaged URANS

应用真实世界研究开展医用耗材使用评价的实践与思考

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中国医疗器械信息 2024年第5期30卷 39-41,68页

作者：郑沁春张晓霞陈实林强林天生陈秋旸邱梅钗陈东叶阿琴福建省立医院福建福州350001

目的:基于真实世界数据开展超声刀耗材的临床应用评价。方法:回顾性选取病案系统中手术术式包含“左肝”的手术记录,排除联合其他肝段切除的手术、成形术或重建术、开放手术后,纳入比较。第一次评价时回顾性选取2019年9月~2021年7月病... 详细信息

目的:基于真实世界数据开展超声刀耗材的临床应用评价。方法:回顾性选取病案系统中手术术式包含“左肝”的手术记录,排除联合其他肝段切除的手术、成形术或重建术、开放手术后,纳入比较。第一次评价时回顾性选取2019年9月~2021年7月病案系统中手术术式包含“左肝”的手术患者67例,最终纳入56例,其中,使用国产超声刀手术者20例,使用进口超声刀手术者36例。2023年通过病案系统检索1~6月份包含“左肝”的手术,纳入观察组患者60例,与2021年的对照组36例进行比较。评价指标:手术时长及术中出血量。结果:所有手术均顺利完成,围手术期无死亡病例,通过分析进口超声刀组与国产超声刀组的统计资料,2021年、2023年组患者术前在年龄、性别、切口类别、是否糖尿病、是否高血压、是否联合手术等指标方面没有明显差别(P>0.05)。2021年数据显示进口和国产产品手术时长有统计学差异;术中出血量无明显差异(P>0.05)。2021年多重线性回归表明,超声刀分组、糖尿病、切口类别和联合手术对手术时长的影响有统计学意义(P<0.05)。结论:腹腔镜下左肝手术应用超声刀耗材手术时间2021年和2023年统计分析结果不同,表明持续开展临床应用评价有助于及时分析不同时间段的耗材使用效果。

关键词：超声刀耗材真实世界研究临床使用评价

Research on the Stability Analysis Method of DC Microgrid Based on Bifurcation and Strobe Theory

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Energy Engineering 2024年第4期121卷 987-1005页

作者： Wei chen Nan qiu Xusheng yang School of Electrical Engineering and Information Engineering Lanzhou University of TechnologyLanzhou730050China

During the operation of a DC microgrid,the nonlinearity and low damping characteristics of the DC bus make it prone to oscillatory *** this paper,we first establish a discrete nonlinear system dynamic model of a DC microgrid,study the effects of the converter sag coefficient,input voltage,and load resistance on the microgrid stability,and reveal the oscillation mechanism of a DC microgrid caused by a single ***,a DC microgrid stability analysis method based on the combination of bifurcation and strobe is used to analyze how the aforementioned parameters influence the oscillation characteristics of the ***,the stability region of the system is obtained by the Jacobi matrix eigenvalue *** simulation verifies the feasibility and effectiveness of the proposed method.

关键词： DC microgrid bifurcation nonlinear dynamics stability analysis oscillation characteristics

Intraspecific floral colour variation in three Pedicularis species

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Plant Diversity 2024年第2期46卷 274-279页

作者： qiu-Yu Zhang Zhe chen Hang Sun yang Niu State Key Laboratory of Plant Diversity and Specialty Crops Kunming Institute of BotanyChinese Academy of SciencesKunming 650201YunnanChina University of Chinese Academy of Sciences Beijing 100049China

Flower constancy describes the phenomenon that pollinators tend to successively visit flowers of a single species during foraging,reducing reproductive interference in natural *** extent of flower constancy is largely determined by the floral traits of co-flowering *** higher inter-specific and lower intraspecific differences of floral traits should contribute to a higher level of flower ***,previous studies mainly focused on interspecific difference,and the intraspecific variation(consistency)of floral traits received much less *** hypothesise that selection may favour lower intraspecific floral trait variation in communities composed of multiple co-flowering *** investigated the floral colour variation of three focal Pedicularis species that share pollinators in 19communities composed of either single or multiple Pedicularis *** was quantified using image-based colour analysis as perceived by *** found that most of the intrapopulation floral colour variation was below the colour discrimination threshold of bumblebees,implying strongly constrained by the visual selection by *** to the hypothesis,there is no significant difference in intraspecific floral colour variation between different community *** may be due to the relatively large interspecific floral colour differences of most co-flowering *** influence of community context on intraspecific variation may be reflected in floral traits other than colours.

关键词： Flower constancy Floral colour variation Plantepollinator interactions Pollinator vision

Cross-species transmission and host range genes in poxviruses

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Virologica Sinica 2024年第2期39卷 177-193页

作者： chen-Hui yang A-Ling Song Ye qiu Xing-Yi Ge College of Biology Hunan Provincial Key Laboratory of Medical VirologyHunan UniversityChangsha410012China

The persistent epidemic of human mpox, caused by mpox virus (MPXV), raises concerns about the future spread ofMPXV and other poxviruses. MPXV is a typical zoonotic virus which can infect human and cause smallpox-likesymptoms. MPXV belongs to the Poxviridae family, which has a relatively broad host range from arthropods tovertebrates. Cross-species transmission of poxviruses among different hosts has been frequently reported andresulted in numerous epidemics. Poxviruses have a complex linear double-strand DNA genome that encodeshundreds of proteins. Genes related to the host range of poxvirus are called host range genes (HRGs). This reviewbriefly introduces the taxonomy, phylogeny and hosts of poxviruses, and then comprehensively summarizes thecurrent knowledge about the cross-species transmission of poxviruses. In particular, the HRGs of poxvirus aredescribed and their impacts on viral host range are discussed in depth. We hope that this review will provide acomprehensive perspective about the current progress of researches on cross-species transmission and HRGvariation of poxviruses, serving as a valuable reference for academic studies and disease control in the future.

关键词： Poxvirus Host range gene(HRG) Host spectrum Cross-species transmission

Satellite glial cells in sensory ganglia play a wider role in chronic pain via multiple mechanisms

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Neural Regeneration Research 2024年第5期19卷 1056-1063页

作者： Xiaoyun qiu Yuanzhi yang Xiaoli Da Yi Wang Zhong chen Cenglin Xu Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province School of Pharmaceutical ScienceZhejiang Chinese Medical UniversityHangzhouZhejiang ProvinceChina

Satellite glial cells are unique glial cells that surround the cell body of primary sensory *** increasing body of evidence suggests that in the presence of inflammation and nerve damage,a significant number of satellite glial cells become activated,thus triggering a series of functional *** suggests that satellite glial cells are closely related to the occurrence of chronic *** this review,we first summarize the morphological structure,molecular markers,and physiological functions of satellite glial ***,we clarify the multiple key roles of satellite glial cells in chronic pain,including gap junction hemichannel Cx43,membrane channel Pannexin1,K channel subunit 4.1,ATP,purinergic P2 receptors,and a series of additional factors and their receptors,including tumor necrosis factor,glutamate,endothelin,and ***,we propose that future research should focus on the specific sorting of satellite glial cells,and identify genomic differences between physiological and pathological *** review provides an important perspective for clarifying mechanisms underlying the peripheral regulation of chronic pain and will facilitate the formulation of new treatment plans for chronic pain.

关键词： chronic pain primary sensory neurons satellite glial cells sensory ganglia