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Low Speed Axial Compressor Stall Margin Improvement by Unsteady Plasma Actuation

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Journal of Thermal Science 2014年第2期23卷 114-119页

作者： LI Gang XU Yanji YANG Lingyuan DU Wei zhu Junqiang NIE chaoqun Institute of Engineering Thermophysics Chinese Academy of Sciences

This research investigates the use of single dielectric barrier discharge(SDBD) actuators for energizing the tip leakage flow to suppress rotating stall inception and extend the stable operating range of a low speed axial compressor with a single *** jet induced by the plasma actuator adds momentum to the flow in the tip region and has a significant impact on the tip-gap *** are carried out on a low speed axial compressor with a single *** static pressure is measured at both the rotor inlet and *** flow coefficient and pressure rise coefficient are *** the characteristic line is acquired to show the overall performance of the *** unsteady plasma actuation of 18kV and 60W the compressor stability range improvement is realized at rotor speed of 1500 r/min – 2400 r/min.

关键词：稳态等离子体轴流压气机低速轴激励器失速裕度介质阻挡放电间隙流动不稳定

医院-社区-家庭三位一体老年慢性病管理模式的构建——以帕金森病为例

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中国中医药现代远程教育 2024年第17期22卷 110-113页

作者：肖科金蔡超群郑庆丹陈良蒋葵高兆玉朱胜华周祎岳阳市中医医院脑病二科湖南岳阳414000

目的以帕金森病为例,构建“医院-社区-家庭”三位一体老年慢性病管理模式,探讨其对慢病管理的应用价值。方法选择96例帕金森病患者,随机分为观察组和对照组,对照组给予常规药物治疗+专科指导及宣教,观察组在此基础上给予“医院-社区-家... 详细信息

目的以帕金森病为例,构建“医院-社区-家庭”三位一体老年慢性病管理模式,探讨其对慢病管理的应用价值。方法选择96例帕金森病患者,随机分为观察组和对照组,对照组给予常规药物治疗+专科指导及宣教,观察组在此基础上给予“医院-社区-家庭”三位一体管理模式干预,比较两组患者的认知功能及生活质量情况。结果干预后,对照组患者的蒙特利尔认知评估量表(MoCA)评分无改变(P>0.05),观察组评分改善(P0.05);观察组在运动检查、治疗并发症方面均有改善,在日常生活能力,精神、行为及感情方面明显改善(P<0.05)。结论“医院-社区-家庭”三位一体老年慢性病管理模式可显著提高帕金森病患者的认知功能及生活质量,是适合我国国情的慢病管理模式,值得推广。

关键词：医院-社区-家庭慢病管理帕金森病

Investigation of dielectric barrier discharge plasma flow control

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Science China(Technological Sciences) 2008年第7期51卷 1064-1072页

作者： NIE chaoqun LI Gang zhu JunQiang ZHANG Yi LI YuTong Key Laboratory of Advanced Energy and Power of Chinese Academy of Sciences at Institute of Engineering Thermophysics Beijing 100080China Laboratory of Optical Physics Institute of PhysicsChinese Academy of SciencesBeijing 100080China

Effects of plasma flow control are researched on the basis of plasma exciting flow experiments and numerical simulations. Turbulent model is more effective than laminar model in plasma numerical simulation as results showed. Both plasma exciting effects of acceleration and flow separation suppression are investigated through experiments carried on the flat plate and the compressor cascades. The results demonstrate that boundary layer characteristic is modified by plasma exciting. Distributions of total pressure and velocity in the wake are improved notably for 20 m/s coming velocity and the effect of plasma can still be observed while velocity is increased to 50 m/s. For low velocity flow, plasma exciting is effective in flow separation suppression.

关键词： flow control dielectric barrier discharge plasma plasma exciting compressor cascade flow separation

Evolution and trends of high myopia research from 2002 to 2021: a scientometric analysis

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Annals of Eye Science 2023年第4期8卷 22-35页

作者： Yuan Tan Weining zhu Yingshi Zou Bowen Zhang Yinglin Yu Wei Li chaoqun Xu Leyi Hu Guangming Jin Zhenzhen Liu State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangdong Provincial Clinical Research Center for Ocular DiseasesGuangzhouChina Zhongshan Medical School Sun Yat-sen UniversityGuangzhouChina

Background:Research on high myopia has gradually formed a complex network of knowledge,but a panorama of evolutionary trends is *** conducting a scientometric analysis,we can gain a deeper understanding of the development and evolution of this ***:The global literature on high myopia published from 2002 to 2021 was extracted from the Science Citation Index Expanded in the Web of Science Core *** Excel,VOSviewer,and CiteSpace were used to analyse and visualize the bibliometric ***-related information,including countries,journals,authors,citations,subject categories,and its’time trends,was ***:A total of 4,226 included publications showed an annually increasing trend during the past 20 *** high myopia research hotspots were refractive error correction,epidemiology,ocular biometry,drug and laser treatment of myopic fundus lesions,and surgical treatment of myopic fundus *** analysis showed that high myopia genetics and myopic fundus lesion research were the research frontiers.A total of 116 disciplines were involved in high myopia ***(n=3,338)was the most dominant subject ***(betweenness centrality=0.65)was the discipline with the most obvious bridge ***&technology—other topics(burst years:2015–2021;strength=14.88)had the greatest strength as of 2021,which was the hottest subject ***:High myopia genetics and myopic fundus lesion research showed a potential for ***-engineering cross-innovation is a cutting-edge technology trend.

关键词： High myopia theme change evolution research hotspot

Microstructural evolution of Au-Sn solder prepared by laminate rolling during annealing process

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Rare Metals 2011年第6期30卷 627-632页

作者： WEI Xiaofeng WANG Richu FENG Yan zhu Xuewei PENG chaoqun School of Materials Science and Engineering Central South University Changsha 410083 China

The microstructural evolution and inteffacial reaction of the Au/Sn/Au/Sn/Au/Sn/Au couples were investigated during annealing at 453, 523, and 543 K for up to 240 h. The Au/Sn combination formed a rapid diffusion system. Even in rolled Au-Sn solder, three phases, such as AuSn, AuSn2, and AuSn4, were formed. After initial annealing at 453 K, the diffusion layers of AuSn, AuSn2, and AuSn4, which were formed after rolling, expanded gradually and then fully transformed into phase （containing Sn from 10% to 18.5%, mole fraction） and 6 （AuSn） phase. As a whole, the microstmcture of the couple was stable during annealing at 453 K. The solid-state interracial reaction was much faster at 523 K than at 453 K. After annealing at 523 K for 6 h, the AuSn, AuSn2, and AuSn4 were fully transformed into the phase and phase （AuSn）. In spite of the prolonged annealing time for up to 240 h, no significant change of the interfacial microstructure occurred, and the microstructure of the couple was stable during annealing at 523 K. When annealing at 543 K, however, the interfacial of Au/Sn was transformed into solid-liquid state, and the whole couple formed a eutecfic structure rapidly, causing the solder to be brittle. The study results clearly demonstrate that the service temperature of the Au-Sn solder should be lower than 543 K.

关键词： Au-Sn solders intermetallic compounds (IMCs) rolling-annealing method interfacial reaction microstructural evolution

A novel method for singularity analysis of the 6-SPS parallel mechanisms

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Science China(Technological Sciences) 2011年第5期54卷 1220-1227页

作者： CHENG ShiLi WU HongTao WANG chaoqun YAO Yu zhu JianYing College of Mechanical & Electrical Engineering Nanjing University of Aeronautics & Astronautics Nanjing 210016 China College of Engineering Nanjing Agricultural University Nanjing 210031 China College of Aerospace Engineering Nanjing University of Aeronautics & Astronautics Nanjing 210016 China

Singularity analysis is a basic problem of parallel mechanism, and this problem cannot be avoided in both workspace and motion planning. How to express the singularity locus in an analytical form is the research emphasis for many researchers for a long time. This paper presents a new method for the singularity analysis of the 6-SPS parallel mechanism. The rotation matrix is described by quaternion, and both the rotation matrix and the coordinate vectors have been expanded to four-dimensional forms. Through analyzing the coupling relationship between the position variables and the orientation variables, utilizing properties of the quaternion, eight equivalent equations can be obtained. A new kind of Jacobian matrix is derived from those equations, and the analytical expression of the singularity locus is obtained by calculating the determinant of the new Jacobian matrix. The singularity analysis of parallel mechanisms, whose moving platform actuated by 6 links and the vertices of both the base and the moving platforms has been placed on a circle respectively, can be solved by this analytical expression.

关键词：奇异性分析并联机构机构分析 PS型解析表达式雅可比矩阵移动平台并行机制

鸡SLMO2基因CDS区克隆、生物信息学及组织表达分析

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中国畜牧杂志 2024年第2期60卷 157-162页

作者：朱慧媛张朋威徐硕辉李瑞婷高超群李文婷蒋瑞瑞孙桂荣韩瑞丽康相涛李东华河南农业大学动物科技学院河南郑州450046 河南省家禽种质资源创新与利用重点实验室河南郑州450046

为了探究类果蝇慢移基因的氨基酸序列特征,探索其在不同肤色鸡不同组织中mRNA表达变化规律,实验采集不同肤色鸡各组织,PCR克隆获得SLMO2完整CDS区,进行生物信息学分析及组织表达分析。实验得到SLMO2的CDS区序列全长560 bp,其中可编码氨... 详细信息

为了探究类果蝇慢移基因的氨基酸序列特征,探索其在不同肤色鸡不同组织中mRNA表达变化规律,实验采集不同肤色鸡各组织,PCR克隆获得SLMO2完整CDS区,进行生物信息学分析及组织表达分析。实验得到SLMO2的CDS区序列全长560 bp,其中可编码氨基酸174个。生物信息学研究结果表明,鸡SLMO2蛋白并不具有信号肽和跨膜结构,蛋白主要结构以无规性卷曲的α-螺旋结构结合为主,且蛋白分布在线粒体内膜间隙。通过氨基酸序列对比发现,鸡与爪蟾的亲缘关系较近。qRT-PCR结果表明,SLMO2在背肤组织中相对表达量极显著高于其他组织,且该基因在丝羽乌骨鸡背肤组织中表达量极显著高于“豫粉1号”H系鸡。以上结果为进一步探究鸡SLMO2对黑色素沉积的调控机制提供了理论依据。

关键词：鸡 SLMO2基因 CDS区克隆组织表达生物信息学分析

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Computational research on film cooling under rotating frame by an anisotropic turbulence model

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Propulsion and Power Research 2013年第1期2卷 20-29页

作者： Jianqin zhu Kai Wang chaoqun Nie National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics School of Energy and Power EngineeringBeihang UniversityBeijing 100191China Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China

A new anisotropic k-o turbulence model was proposed in this *** new model,with the standard k-o model and the standard k-e model was embedded in our three-dimensional(3-D)Navier-Stokes code to compute rotational film *** addition,the theoretical and numerical analysis on the influence of the Coriolis and buoyancy forces induced by the rotation was discussed in *** findings of this study are as follows:⑴The new anisotropic k-o model preformed much better compared to its isotropic counterparts.(2)In the region of 6D-12D downstream the film hole,the numerical results of the new model were much closer to the experimental data than that in the region of 0-6D.(3)The constant density term can be balanced by the pressure gradient and would not influence the velocity and temperature *** the centrifugal buoyancy force and the Coriolis force would change the trajectory of cooling air and temperature distributions.

关键词： Film cooling Turbulence model Rotation Coriolis force Centrifugal force

Photophysics, morphology and device performances correlation on non-fullerene acceptor based binary and ternary solar cells

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Journal of Energy Chemistry 2020年第8期29卷 180-187,I0007页

作者： Guanqing Zhou Hong Ding Lei zhu chaoqun Qiu Ming Zhang Tianyu Hao Wei Feng Yongming Zhang Haiming zhu Feng Liu School of Physics and Astronomy and Collaborative Innovation Center of IFSA(CICIFSA)Shanghai Jiao Tong UniversityShanghai 200240China School of Chemistry and Chemical Engineering and Center for Advanced Electronic Materials and DevicesShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640GuangdongChina Department of Chemistry Zhejiang UniversityHangzhou 310027ZhejiangChina State Key Laboratory of Fluorinated Materials Zibo 256401ShandongChina

Non-fullerene acceptor(NFA) based organic solar cells(OSCs) are of high efficiency and low energy loss and low recombination features, which is owing to the advantage of non-fullerene acceptors. The photophysics investigation of non-fullerene solar cells, in comparing to fullerene based analogue as well as mixed acceptor ternary blends could help to understand the working mechanism of NFA functioning mechanism. We choose PBDB-T donor, the fullerene derivative PC71 BM acceptor, and the non-fullerene acceptor ITIC as the model system, to construct binary and ternary solar cells, which then subject to ultrafast spectroscopy investigation. The charge transfer pathway in binary and ternary blends is *** it is seen that ITIC leads to a faster exciton separation and exciton diffusion. ITIC in blends suppresses the geminate recombination and shows smaller amount of charge transfer states, which is beneficial for the device performance. And the addition of ITIC enhances the crystallinity for both donor and acceptor leads to a morphology change of forming bicontinuous crystalline networks and phase separation. In a consequence, fill factor and JSC, increase dramatically for the related OSC.

关键词： Non-fullerene electron acceptors Charge transfer Recombination Crystallinity