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Effect of Incoming Vortex on Secondary Flows in Turbine Cascades with Planar and Non-Axisymmetric Endwall

Journal of Thermal Science 2024年第1期33卷 138-157页

作者： CAO Zhiyuan wang chuxuan SONG Zhigao GAO Xi ZHAO Wei LIU Bo School of Power and Energy Northwestern Polytechnical UniversityXi'an 710072China National Key Laboratory of Science and Technology on Aerodynamic Design and Research Northwestern Polytechnical UniversityXi'an 710072China Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100080China School of Aeronautics and Astronautics University of Chinese Academy of SciencesBeijing 100080China

Non-Axisymmetric Endwall Profiling(NAEP) is commonly utilized in turbines to eliminate secondary ***,most of the NAEP methods consider a single-blade row environment without incorporating the effect of the stage *** paper aims to investigate the influence mechanism of the incoming vortex on the endwall secondary flow structures of NAEP in a highly loaded turbine *** model the incoming vortex in a stage environment,this study considers a half-delta wing as the vortex generator at the upstream of the turbine *** NAEP is then carried out for a highly loaded turbine cascade with an in-house numerical optimization design platform subject to no incoming *** simulation is also carried out under the influence of the incoming vortex for the turbine cascades with both planar and non-axisymmetric *** paper furthers investigated the pitchwise effect of the incoming vortex on the near endwall secondary *** results indicate that the NAEP effectively improves the endwall secondary flow of the turbine cascade,where the total pressure loss coefficient and the secondary kinetic energy(SKE) are reduced by 7.3%,and 45.7%,*** is further seen that with the incoming vortex,the NAEP achieves a considerable control effect on the endwall secondary flow of the turbine *** incoming vortex,the NAEP can still achieve considerable control effect on the endwall secondary flow of the turbine cascade;the averaged reductions of loss coefficient and SKE are 7.8% and 14.2%,*** some pitchwise locations,incoming vortex can suppress the convection of cross-passage flow toward the suction corner greatly and reduce the loss coefficient of the baseline *** incoming vortex at 4/7 pitch impinged right at the blade leading edge,leading to the generation of low-momentum fluid,which increased the size and the strength of the horseshoe *** all the pitchwise locations,NAEP can suppress the seco

关键词： non-axisymmetric endwall secondary flow incoming vortex passage vortex stage environment

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Epidermal radio frequency electronics for wireless power transfer

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Microsystems & Nanoengineering 2016年第1期2卷 52-60页

作者： Xian Huang Yuhao Liu Gil Woo Kong Jung Hun Seo Yinji Ma Kyung-In Jang Jonathan A.Fan Shimin Mao Qiwen Chen Daizhen Li Hank Liu chuxuan wang Dwipayan Patnaik Limei Tian Giovanni A.Salvatore Xue Feng Zhenqiang Ma Yonggang Huang John A.Rogers Department of Biomedical Engineering School of Precision Instrument and Opto-electronics EngineeringTianjin UniversityTianjin 300072China Department of Materials Science and Engineering University of Illinois at Urbana-ChampaignUrbanaIL 61801USA Department of Electrical and Computer Engineering University of Wisconsin-MadisonMadisonWI 53706USA Department of Civil and Environmental Engineering Northwestern UniversityEvanstonIL 60208USA Department of Engineering Mechanics Center for Mechanics and MaterialsTsinghua UniversityBeijing 100084China Department of Mechanical Engineering Northwestern UniversityEvanstonIL 60208USA Department of Robotics Engineering Daegu Gyeongbuk Institute of Science and TechnologyDaegu 42988Republic of Korea Department of Electrical Engineering Stanford UniversityStanfordCA 94305USA

Epidermal electronic systems feature physical properties that approximate those of the skin,to enable intimate,long-lived skin interfaces for physiological measurements,human–machine interfaces and other applications that cannot be addressed by wearable hardware that is commercially available today.A primary challenge is power supply;the physical bulk,large mass and high mechanical modulus associated with conventional battery technologies can hinder efforts to achieve epidermal characteristics,and near-field power transfer schemes offer only a limited operating *** we introduce an epidermal,farfield radio frequency(RF)power harvester built using a modularized collection of ultrathin antennas,rectifiers and voltage *** components,separately fabricated and tested,can be integrated together via methods involving soft contact *** studies of the individual components and the overall performance in various dielectric environments highlight the key operational features of these systems and strategies for their *** results suggest robust capabilities for battery-free RF power,with relevance to many emerging epidermal technologies.

关键词： antenna design epidermal electronics modularization silicon nanomembrane soft-contact lamination specific absorption rate wireless power

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共沉淀法制备Ag_3PO_4/MWCNTs复合光催化材料及其表征与降解染料废水

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北京化工大学学报（自然科学版） 2017年第4期44卷 69-75页

作者：邵淑文王楚璇张涛蔡漪张中杰关卫省长安大学环境科学与工程学院西安710054 青岛市市政工程设计研究院有限责任公司青岛266101 长安大学环境科学与工程学院旱区地下水文与生态效应教育部重点实验室西安710054

通过简单的共沉淀法制备掺杂不同碳管含量的Ag_3PO_4/MWCNTs复合光催化材料,并对样品进行XRD、SEM、FT-IR、UV-vis等表征。以300 W氙灯模拟太阳光,通过光催化材料对甲基橙的降解来评价光催化材料对印染废水的催化效果。结果表明:PVP的... 详细信息

通过简单的共沉淀法制备掺杂不同碳管含量的Ag_3PO_4/MWCNTs复合光催化材料,并对样品进行XRD、SEM、FT-IR、UV-vis等表征。以300 W氙灯模拟太阳光,通过光催化材料对甲基橙的降解来评价光催化材料对印染废水的催化效果。结果表明:PVP的存在使得制备的Ag_3PO_4颗粒表面光滑、结晶性好、尺寸较小(200~300 nm);经过混酸改性后增加了大量的带有羧基基团的碳管,均匀地分布在Ag_3PO_4颗粒表面,与其形成了很好的复合;合成的复合材料较纯Ag_3PO_4具有更加优异的光催化活性,当碳管质量分数为3.6%时催化效果最好。最后,对所制备材料的光催化机理进行了分析。

关键词：光催化材料印染废水甲基橙磷酸银

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Homer1b/c“支架”在CTNND2-/-自闭症模型鼠中的作用研究

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重庆医科大学学报 2024年第4期49卷 409-414页

作者：张翰鸿王岩吕明其聂应蔡锦雯王楚萱李英博重庆医科大学神经科学研究中心重庆400016 重庆医科大学实验教学管理中心人体机能实验室重庆400016

目的:观察CTNND2-/-自闭症模型鼠前额叶皮层中支架蛋白荷马1b/c(homer protein homolog 1b and 1c,Homer1b/c)与三磷酸肌醇受体(inositol 1,4,5-trisphosphate receptor,IP3R)、代谢型谷氨酸受体5(metabotropic glutamate receptor 5,mGluR5)和香克3蛋白(sh3 and multiple ankyrin repeat domains 3,Shank3)蛋白相关复合体的变化;前额叶皮层中常见氨基酸的变化,发现自闭症模型鼠中可能参与疾病发生的关键靶点。方法:蛋白免疫印迹法(Western blot,WB)法检测CTNND2-/-自闭症模型鼠前额叶皮层中支架蛋白Homer1b/c、突触后密度蛋白-95(postsynaptic density protein 95,PSD-95)、突触素蛋白(synaptophysin,SYP)、囊泡谷氨酸转运体1(vesicular glutamate transporter 1,vGluT1)的表达的变化;通过免疫荧光(immunofluorescence,IF)观察Homer1b/c与IP3R、mGluR5和Shank3蛋白的表达与共定位;免疫共沉淀(co-immunoprecipitation,CO-IP)技术分别观察Homer1b/c与IP3R、mGluR5或Shank3结合的变化;使用液相色谱(liquid chromatography,LC)观察前额叶皮层中常见氨基酸的变化。结果:与对照组相比,CTNND2-/-模型鼠前额叶皮层中Homer1b/c(P=0.003)、PSD-95(P=0.003)以及SYP蛋白(P=0.046)的表达均明显降低;同时,Homer1b/c与IP3R、mGluR5、Shank3蛋白相互之间结合减少;前额叶皮层中常见的兴奋性神经递质谷氨酸(glutamate,Glu)和抑制性神经递质γ-氨基丁酸(γ-aminobutyric acid,GABA)的表达无明显变化(P=0.366,P=0.355),组氨酸(histidine,His)(P=0.036),酪氨酸(tyrosine,Tyr)(P=0.030)表达则明显增高。结论:CTNND2-/-自闭症模型鼠中Homer1b/c蛋白低表达,同时Homer1b/c与IP3R、Shank3、mGluR5蛋白复合物的形成减少,并推测低表达的Homer1b/c可能是导致自闭症神经元突触异常发育的关键靶点。

关键词： Homer1b/c 自闭症谱系障碍 CTNND2基因敲除鼠

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柔性自动加工线上气缸体铣削油壳底面的夹具设计

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现代制造技术与装备 2023年第1期59卷 78-82页

作者：鲁峰汪楚璇阮志坚陈君宝湖北汽车工业学院机械工程学院十堰442002 天津理工大学机械工程学院天津300384

针对某公司气缸体在柔性自动加工线上R10工位上油壳底面的精铣加工,采取一面两销的夹具进行定位。根据工序集中原则,夹具将确定工件在机床中的加工位置,并对工件进行夹紧、定位后气密性检测、辅助支撑以及辅助上料,从而自动化生产。定... 详细信息

针对某公司气缸体在柔性自动加工线上R10工位上油壳底面的精铣加工,采取一面两销的夹具进行定位。根据工序集中原则,夹具将确定工件在机床中的加工位置,并对工件进行夹紧、定位后气密性检测、辅助支撑以及辅助上料,从而自动化生产。定位零件采用定位块,定位销采用圆柱销,力源装备选择液压油缸进行推动夹紧,利用支撑缸和推缸等防止工件变形。通过定位误差分析和夹紧力计算,证实了夹紧机构设计的合理性,可适应于实际生产。

关键词：夹具设计定位夹紧工件

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益气活血方治疗老年“H型”高血压(气虚血瘀)临床观察

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实用中医内科杂志 2020年第5期34卷 123-126页

作者：王楚璇张立德谷丽艳程岩岩辽宁中医药大学辽宁沈阳110847

目的老年"H型"高血压(气虚血瘀)的临床治疗应用单纯西药治疗和西药联合益气活血方治疗两种手段,探讨两种治疗手段的临床疗效。方法随机选取110例典型老年"H型"高血压(气虚血瘀)参与本次研究,依照患者接受治疗的顺序将其拆分为应用不同... 详细信息

目的老年"H型"高血压(气虚血瘀)的临床治疗应用单纯西药治疗和西药联合益气活血方治疗两种手段,探讨两种治疗手段的临床疗效。方法随机选取110例典型老年"H型"高血压(气虚血瘀)参与本次研究,依照患者接受治疗的顺序将其拆分为应用不同治疗手段的人数相等,分别命名为对照组和观察组。其中对照组的55例患者在本次为期4周的治疗中接受苯磺酸氨氯地平片和叶酸片的常规西药治疗,观察组的所有患者除了服用对照组的常规西药治疗药物另外加服益气活血方进行治疗。治疗结束后将对照组和观察组的血压总有效率、血压水平和具体疗效进行对比分析。结果对比分析本次研究中对照组和观察组患者接受对症治疗前后的血压水平(CBP),对比结果显示两组患者治疗前的血压状况不存在明显差异,接受相应治疗后两组患者的CBP都出现一定程度的改善,对比之下观察组患者收缩压改善结果相比对照组更加理想;但两组患者舒张压下降幅度差异性不具有对比意义。90.91%(50/55)是本次研究中观察组55例治疗的总有效率,对照组为81.82%(45/55),对比之下观察组优势明显;对比两组的中医证候,对比结果显示观察组患者改善结果更为理想;两组患者的中医证候具体疗效对比同样是观察组具有优势(P<0.05)。结论老年"H型"高血压(气虚血瘀)病患的临床治疗过程中对益气活血方和西药治疗方法进行联合治疗,其相比单纯西药治疗方法而言临床疗效显著提升,于患者生存及生活质量的改善有积极意义。

关键词：益气活血高血压气虚血瘀中医疗效西药分组有效率血压水平

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Organic photocatalysts:From molecular to aggregate level

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Nano Research 2022年第5期15卷 3835-3858页

作者： chuxuan Yan Jiaqi Dong Yingzhi Chen Wenjie Zhou Yu Peng Yue Zhang Lu-ning wang School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Shunde Graduate School of University of Science and Technology Beijing Foshan 528399China

Organic semiconductors(OSCs)have the advantages of tunable molecular structures,suitable band gaps,and exceptional optoelectronic *** π-π stacking ability of OSCs also leads to appealing molecular stacking structure,function,and *** far,organic photocatalysts have engaged in homogeneous or heterogeneous photocatalysis in the form of free molecules,supported molecules,or ***,researches on organic photocatalysts have expanded from small organic molecules to the organic macromolecules,as well as their various nanostructures and nanocomposites including isolated zero-dimensional(0D),one-dimensional(1D),two-dimensional(2D),three-dimensional(3D)nanostructures,and their ***,many versatile strategies have been explored to improve photocatalytic ability and practicality either from molecular synthetic modification,crystal,or interface *** this review,we first discuss the photophysical and photochemical processes of organic photocatalysts that govern the ultimate photocatalytic efficiency;we then summarize different forms of organic photocatalysts,their rational design strategies,and mechanistic pathways,as well as their applications in H_(2) evolution,CO_(2) reduction,and environmental purification,aiming to highlight the structure/property relationships;we lastly propose ongoing directions and challenges for future development of organic photocatalysts in real use.

关键词： organic photocatalyst homogeneous photocatalysis heterogeneous photocatalysis nanostructure heterostructure

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Organic semiconductor nanostructures:optoelectronic properties,modification strategies,and photocatalytic applications

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Journal of Materials Science & Technology 2022年第18期113卷 175-198页

作者： Jiaqi Dong chuxuan Yan Yingzhi Chen Wenjie Zhou Yu Peng Yue Zhang Lu-Ning wang Zheng-Hong Huang School of Materials Science and Engineering University of Science and Technology BeijingBeijing100083China Shunde Graduate School of University of Science and Technology Beijing Foshan528399China Key Laboratory of Advanced Materials(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing100084China

Organic semiconductors(OSCs)possess diverse chemical structures and tailored optoelectronic properties via simple chemical modifications,so increasing use of them are found in efficient visible-light ***,the weak chemical bonds and the poor charge behavior(e.g.,low concentration of free charge carriers,low carrier mobility)intrinsic in them,always incur quite limited stability and ***,the assembly of them into refined nanostructures or nanocomposites is usually proposed to enhance their optoelectronic properties,as well as the photocatalytic efficiency and ***-dimensional(0D)nanoparticles are low in size and hence high specific surface area(SSA);One-dimensional(1D)nanostructures are usually arranged in an orderly long range thus leading to low surface defect density and increased carrier mobility;Two-dimensional(2D)nanostructures are particularly capa-ble of enhancing the photogenerated charge utilization because of their large reaction sites and shortened charge transport ***,the building of heterogeneous interfaces in the nanocomposites can effectively facilitate the special charge *** these highlight the importance of organic nanos-tructures in improving the photocatalytic activity and ***,organic semiconductor nanostructures(OSNs)have been increasingly used in the photocatalytic water splitting into H_(2) and O_(2),CO_(2) reduction,pollutant decomposition,disinfection,*** this review,we first examine the important optoelectronic properties of OSNs that govern the photocatalytic processes;we then analyze different classes of OSNs and their mechanistic pathways,with an emphasis on the structure-property relationships;we also introduced various photocatalytic applications of OSNs;we lastly propose the challenges and future outlook in real use.

关键词： Organic semiconductors Nanostructures Optoelectronic properties Photocatalysis

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Elastic-viscoplastic behaviors of polymer-blend geocell sheets:Numerical and experimental investigations

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第10期16卷 4261-4271页

作者： Yang Zhao Jianbin Chen Zheng Lu Jie Liu Abdollah Tabaroei chuxuan Tang Yong wang Lipeng Wu Bo wang Hailin Yao State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China Wuhan Municipal Engineering Design&Research Institute Co. Ltd.Wuhan430023China Hubei Key Laboratory of Geo-Environmental Engineering Wuhan430071China Xinjiang Transportation Planning Survey and Design Institute Co. Ltd.Urumqi830006China Department of Civil Engineering Eshragh Institute of Higher EducationBojnourd***Iran University of Chinese Academy of Sciences Beijing100049China China Energy Engineering Gezhouba Rail Transit Construction Co. Ltd.Shenzhen518116China

Polymer-blend geocell sheets(PBGS)have been developed as substitute materials for manufacturing *** attempts have been made to test and predict the behaviors of commonly used geogrids,geotextiles,geomembranes,and ***,the elastic-viscoplastic behaviors of novel-developed geocell sheets are still poorly ***,this paper investigates the elastic-viscoplastic behaviors of PBGS to gain a comprehensive understanding of their mechanical ***,the tensile load-strain history under various loading conditions is simulated by numerical calculation for widespread *** achieve this goal,monotonic loading tests,short-term creep and stress relaxation tests,and multi-load-path tests(also known as arbitrary loading history tests)are performed using a universal testing *** results are simulated using the nonlinear three-component(NLTC)model,which consists of three nonlinear components,i.e.a hypo-elastic component,a nonlinear inviscid component,and a nonlinear viscid *** experimental and numerical results demonstrate that PBGS exhibit significant elastic-viscoplastic behavior that can be accurately predicted by the NLTC ***,the tensile strain rates significantly influence the tensile load,with higher strain rates resulting in increased tensile loads and more linear load-strain ***,parametric analysis of the rheological characteristics reveals that the initial tensile strain rates have negligible impact on the *** rate-sensitivity coefficient of PBGS is approximately 0.163,which falls within the typical range observed in most geosynthetics.

关键词： Polymer-blend geocell sheets Geosynthetics Elastic-viscoplastic behavior Numerical simulations Tensile load-strain response

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Insights into the dwarfing mechanism of pear(Pyrus betulaefolia) based on anatomical and structural analysis using X-ray scanning

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Horticultural Plant Journal 2024年第2期10卷 355-366页

作者： Lili Dong chuxuan Yang Jing wang Jingjing Li Mei Zhao Dingli Li Zhiyun Qiu Chunhui Ma Zhenhua Cui College of Horticulture Qingdao Agricultural UniversityQingdaoShandong 266109China College of Landscape and Forestry Qingdao Agricultural UniversityQingdaoShandong 266109China

The lack of a suitable rootstock to control scion growth has limited the development of high-density plantations in pear production, which is partly attributed to poor understanding of the dwarfing mechanism. In the present study, the rootstock of the dwarf-type pear (Pyrus betulaefolia)PY-9’ was identified and used as the material for anatomical ***-9’ grew to half the tree height of the normal cultivar Zhengdu’, along with fewer internodes and shorter length. Significant differences in growth rate betweenPY-9’ andZhengdu’ were detected at approximately 30 days after full bloom, which corresponded with the time of the greatest difference in water potential between the dwarf and normal ***-9’ showed a higher photosynthetic rate thanZhengdu’. Anatomical analysis showed thatPY-9’ had higher area ratios of both phloem and xylem and more developed vascular tissues thanZhengdu’. The three-dimensional reconstructed skeleton of the xylem from X-ray computed tomography scanning revealed greater intervessel connectivity inZhengdu’ than inPY-9’, which could contribute to the more vigorous growth ofZhengdu’. This study thus provides the first comparison of the microstructural properties of xylem elements between a dwarfing-type and vigorous-type pear rootstock, providing new insights into the dwarfing mechanism in pear and facilitating breeding of dwarf pear rootstocks to increase crop productivity.

关键词： Pyrus betulaefolia Anatomical analysis Dwarfing mechanism Intervessel connectivity Rootstock

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