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227篇 您的检索式:作者名="Q. Yang"
    题名 作者 年代 出处 被引量
1A Review of Modular Multilevel Converters显示文摘模块组合多电平变换器(modular multilevel converter,MMC)具有高度模块化、易于扩展、输出电压波形好等特点,尤其适用于中高压大功率系统应用。首先介绍MMC的电路拓扑和工作原理,总结MMC的主要技术特点;然后分别回顾MMC在脉冲调制、直流电压控制、预充电、环流、谐波、数学模型、主电路参数设计、故障保护等关键问题的最新研究进展,以及其在电力传动、电能质量问题治理领域的工程应用现状,在此基础上指出MMC今后亟待研究的关键问题。相关研究结果表明,MMC在电力系统中有广泛的应用前景,是未来中高压大功率系统,尤其是高压输电技术的重要发展方向。YANG Xiaofeng LIN Zhiqin ZHENG Trillion Q. YOU Xiaojie 2013中国电机工程学报2013,33,6:99
2Schistosoma japonicum egg antigens stimulate CD4(+) CD25(+) T cells and modulate airway inflammation in a murine model of asthma显示文摘Yang, J. H. Zhao, J. Q. Yang, Y. F. Zhang, L. Yang, X. Zhu, X. Ji, M. J. Sun, N. X. Su,C. 2007南京医科大学学报(自然科学版)2007,27,4:25
3A Modified Entropy Generation Number for Heat Exchangers显示文摘AModifiedEntropyGenerationNumberforHeatExchangersAModifiedEntropyGenerationNumberforHeatExchangers¥Z.M.Xu;S.R.Yang(Department...Z. M. Xu S. R. Yang Z. Q. Chen 1996Journal of Thermal Science1996,5,4:14
4STUDY ON THE PREDICTIVE METHOD OF BUCKLING DEFORMATIONS OF THIN-PLATE WELDED STRUCTURES显示文摘The buckling formation and influence factors during welding thin - plated structures were investigated based on finite element methods, An engineering treatment method for prdicating the buckling distor- tion was proposed in here. It was used the equivalent applied thermal - load to simulate the welding residual stress,therefore the calculation of complex welding distoriton can be transformed into 3D elas- tic structural applied- load analyses, which can reduce the quantities of calculating works effectively. The validation of the method was verified by comparison of the numerical simulation and experimental results. The simulation of buckling distorition for side - walled structrues of paseenger train was per- formed and the calculation was in agreement with measuring results in general. It was shown that the main factors for producing the buckling were the intermittent fillet and ping the during welding the stiffened beams and columns to the panel.The existence of the free edge of panels would reduce the crit- ical buckling stress and enlarge the deflection obviously,but the continuous weld in closed frames didn’ t degrade the buckling situation.X. Q. Yang L. X. Huo Y. F. Zhang and J. X. Yan (School of Material Science and Engineering, Tianjin University, Tianjin 300072, China) 2000Acta Metallurgica Sinica(English Letters)2000,13,1:13
5Microstructure and mechanical optimization of probeless friction stir spot welded joint of an Al-Li alloy显示文摘In this work, a third generation Al-Li alloy has been successfully spot welded with probeless friction stir spot welding(P-FSSW), which is a variant of conventional friction stir welding. The Box-Behnken experimental design in response surface methodology(RSM) was applied to optimize the P-FSSW parameters to attain maximum tensile/shear strength of the spot joints. Results show that an optimal failure load of7.83 kN was obtained under a dwell time of 7.2 s, rotation speed of 950 rpm and plunge rate of 30 mm/min.Sufficient dwell time is essential for heat conduction, material flow and expansion of the stir zone to form a sound joint. Two fracture modes were observed, which were significantly affected by hook defect.In addition to mechanical testing, electron backscattering diffraction(EBSD) and differential scanning calorimetry(DSC) were used for microstructure evolution and property analysis. The precipitation of GP zone and Al3 Li as well as the ultrafine grains were responsible for the high microhardness in the stir zone.Q. Chu W.Y. Li X.W. Yang J.J. Shen A. Vairis W.Y. Feng W.B. Wang 2018Journal of Materials Science & Technology2018,34,10:12
6SIMULATION ON HEATING PROCESS IN ULTRASONIC WELDING OF PLASTICS显示文摘The energy conversion during ultrasonic plastic welding is analyzed on the basis of the theory of vis- coelastic mechanics,.The temperature field and the temperature change of the ABS specimen with ener- gy director during ultrasonic welding is simulated with finite element method(FEM). In the simu- lation process,the melting of the energy energy is also considered. The calculation results are in good agreement with the temperature measurement results, which proves that the simulation results are reli- able.S. Q. Yang Z. Dong J. C. Yan and J. B. Ju( National Key Laboratory of Advanced Welding Production Technology, HIT, Harbin 150001, China) 2000Acta Metallurgica Sinica(English Letters)2000,13,1:10
7Gly(82)Ser polymorphism of the receptor for advanced glycation end products is associated with an increased risk of gastric cancer in a Chinese population显示文摘Gu, H.J. Yang, L. Sun, Q. M. Zhou, B. Tang, N. P. Cong, R. H. Zeng, Y. Wang, B. 2008南京医科大学学报(自然科学版)2008,28,9:9
8Hsa-miR-1246, hsa-miR-320a and hsa-miR-196b-5p inhibitors can reduce the cytotoxicity of Ebola virus glycoprotein in vitro显示文摘Ebola virus(EBOV)causes a highly lethal hemorrhagic fever syndrome in humans and has been associated with mortality rates of up to 91%in Zaire,the most lethal strain.Though the viral envelope glycoprotein(GP)mediates widespread inflammation and cellular damage,these changes have mainly focused on alterations at the protein level,the role of microRNAs(miRNAs)in the molecular pathogenesis underlying this lethal disease is not fully understood.Here,we report that the miRNAs hsa-miR-1246,hsa-miR-320a and hsa-miR-196b-5p were induced in human umbilical vein endothelial cells(HUVECs)following expression of EBOV GP.Among the proteins encoded by predicted targets of these miRNAs,the adhesion-related molecules tissue factor pathway inhibitor(TFPI),dystroglycan1(DAG1)and the caspase 8 and FADD-like apoptosis regulator(CFLAR)were significantly downregulated in EBOV GP-expressing HUVECs.Moreover,inhibition of hsa-miR-1246,hsa-miR-320a and hsa-miR-196b-5p,or overexpression of TFPI,DAG1 and CFLAR rescued the cell viability that was induced by EBOV GP.Our results provide a novel molecular basis for EBOV pathogenesis and may contribute to the development of strategies to protect against future EBOV pandemics.SHENG MiaoMiao ZHONG Ying CHEN Yang DU JianChao JU XiangWu ZHAO Chen ZHANG GuiGen ZHANG LiFang LIU KangTai YANG Ning XIE Peng LI DangSheng ZHANG Michael Q. JIANG ChengYu 2014Science China(Life Sciences)2014,57,10:7
9ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY STUDY OF CORROSION INHIBITION OF MODIFIED LIGNOSULPHONATE FOR CARBON STEEL显示文摘The corrosion inhibition for carbon steel in circulating cooling water by modified lignosulphonate has been investigated using electrochemical impedance spectroscopy technique. Results show that the inhibition efficiency of modified lignosulphonate GCL2 is a great improvement on that of lignosulphonate. The maximum inhibition efficiency of GCL2 reaches 99.21% at the concentration of 400mg·L-1 at 303K. The corrosion inhibition of GCL2 is attributed to forming adsorption film on the metal surface for the electrochemical impedance spectroscopy in GCL2 solution shows more than one time-constant. Moreover, results also indicate that it is more efficient in stirring solution than in still solution for GCL2 because the constant of adsorption in stirring solution is much larger than that in still solution. The adsorption of inhibitor GCL2 follows Langmuir’s adsorption isotherm.C.H. Yi X. Q. Qiu D.J. Yang H.M. Lou 2005Acta Metallurgica Sinica(English Letters)2005,18,4:6
10SIMULATION ON TEMPERATURE FIELD OF FRICTION STIR WELDED JOINTS OF 2024-T4 Al显示文摘The thermal model of FSW based on the thermal elastic-plastic finite element method, and the transient temperature distribution of FS welded joints of 2024-T4 Al was simulated by using this model, which provides useful information for the investigation of FSW process. Simulation results show that the temperature distribution of the weld gradually decreases toward periphery in a radiate format, whose center is the probe, and the highest temperature in the weld can reach about 400℃. The initial terminal of the weld is a zone, in which the temperature gradient is great, and defects of the welding are easily produced in this zone. Temperature change at the end of the welded joint is as layer variation, the local serious defects are not easy to produce in this zone.S.X. Lu J. C. Yan W.G. Li S. Q. Yang 2005Acta Metallurgica Sinica(English Letters)2005,18,4:6
11Multiple Chromatographic and Chemometric Methods for Quality Standardization of Chinese Herbal Medicines显示文摘Quality standardization of complementary medicine is fundamental for industry and practice as it underpins the quality,safety and efficacy of Chinese herbal medicines.Current herbal standardizations are often based on the quantitative analysis of a single compound,which may not reflect the total characteristic,bioactive and toxic nature of the herbs or products.Therefore,there is a need to establish an internationally recognized methodology for quality standardization of Chinese herbal medicines.The analytical methods reviewed in this article are pharmacognosy,TLC,HPLC,LCMS,CE and chemo-metrics.This article also covers the developments and applications of these methods in quality standardization.Recent advances show that a combination of these methods creates an overall chemical profile of each herb.This is supported by results reviewed in this article and obtained in our laboratory tests on medicinal herbs including Hypericum perforatum,Morinda officinalis and Centella asiatica.Significant variations in active components have been observed between herbal samples and products.It is proposed that the identification of active components,pharmacological activities and eventual clinical applications are required for a comprehensive quality standardization system.Our findings indicate that the combination of various chromatographic and chemometric methods will advance the methodology of quality standardization and enhance the overall confidence in herbal medicine for the health practitioner and the public.Valentina Razmovski-Naumovski Wannit Tongkao-on Benjamin Kimble Vincent L. Qiao Bei-lun Lin Kong M. Li Basil Roufogalis Depo Yang Meicun Yao George Q. Li 2010世界科学技术-中医药现代化2010,12,1:5
12Termination of polymorphic ventricular tachycardia storm by catheter ablation in a patient with cardiomyopathy induced by incessant idiopathic left ventricular tachycardia显示文摘Shan, Q. J. Chen, M. L. Xu, D. X. Zou, J. G. Yang, B. Chen, C. Cao, K. J. 2007南京医科大学学报(自然科学版)2007,27,10:5
13EFFECTS OF MICROSTRVCTURE ON FATIGUE CRACK GROWTH BEHMIOR IN Ni-BASE SUPERALLOY GH586显示文摘Threshold stress values, muging from ~8 to 16MPa·m1/2 can be obtained in a Ni-base alloy GH586 by varying the microstructure through heat treatments. The threshold and low crack growth rate behaviors at room temperature, with varying groin size and γ’-distribution, have been investigated. The results indicate that grain size is an important microstructurol parameter that affects fatigue crack growth threshold and propagation behaviors, as the values of △Kth increase with increasing grain size, but the γ’ -distribution also has important effect. Analyses show that the effects of groin size on threshold and low crack-growth rate behavior result from heterogeneous deformation and roughness-induced crack closure due to crystallographic slipping and cracking in coarse microstructure. The higher △Kth and lower fatigue crack growth rate with increasing amounts of fine γ’ phases are closely related to less damage accumulation level in deformation zone of crack-tip resulted from heterogeneous deformation due to dislocations’ shearing γ’ precipitates.S.S. Xie X.F. Pan T.L. Wang Z.X. Wang H.C. Yang and Q. Wang ( School of Materials and Metallurgy, Northeastern Universityl Shenyang 110006, China)( School of Materials and Metallurgy, Northeastern Universityl Shenyang 110006, China)( School of Materia 1999Acta Metallurgica Sinica(English Letters)1999,12,3:5
14Schistosoma japonicum egg antigens stimulate CD4(+) CD25(+) T cells and modulate airway inflammation in a murine model of asthma显示文摘Yang, J. H. Zhao, J. Q. Yang, Y. F. Zhang, L. Yang, X. Zhu, X. Ji, M. J. Sun, N. X. Su, C. 2007南京医科大学学报(自然科学版)2007,27,5:4
15Isolation and characterization of a serine protease from the nematophagous fungus, Lecanicillium psalliotae, displaying nematicidal activity显示文摘Yang, J. K. Huang, X. W. Tian, B. Y. Wang, M. Niu, Q. H. Zhang, K. Q. 2007中国生物学文摘2007,21,2:3
16Template-free Fabrication and Luminescent Characterization of Highly Uniform and Monodisperse Y_2O_2S:Sm^(3+) Hollow Submicrospheres显示文摘Well dispersed and homogeneous Y2O2S:Sm3+ hollow submicrospheres were successfully achieved by a templatefree solvothermal method combining with a postcalcining process.The crystalstructure and particle morphology were investigated by the X-ray diffraction(XRD),Fourier transform infrared(FT-IR) spectra,scanning and transmission electron microscopy(SEM and TEM),respectively.A possible growth mechanism was proposed to reveal the formation process.Luminescence properties of the Y2O2S:Sm3+ long-lasting phosphor were analyzed by measuring the excitation spectra,emission spectra,afterglow decay curve and thermoluminescence curve.The excitation spectra indicated that the phosphor could be excited effectively by the ultraviolet-light emitting diode(UV-LED) or blue LED,and the emission spectra showed that the phosphor could emit red light from 600 to 650 nm.S.Q. Deng Z.P. Xue Y.H. Yang Q. Yang Y.L. Liu 2012Journal of Materials Science & Technology2012,28,7:3
17Identification of miRNAs associated with tumorigenesis of retinoblastoma by miRNA microarray analysis显示文摘Jian-Jun Zhao Juhua Yang Jianhong Lin Nan Yao Yihua Zhu Jianlong Zheng Jianhua Xu Jin Q. Cheng Jian-Yin Lin Xu Ma 2009Child’s Nervous System2009,,1:2
18MLCROSTRUCTURE AND PROPERTIES OF C-Cu NANOSTRUCTURE THIN FILM显示文摘Nanostructured C-Cu thin films were deposited by reactive sputtering method and cosputtering method. The relationships between microstructures, properties, and deposition parameters were studied and the results obtained from TEM, AFM, and XPS. indicate that the thin films are nanostructural, and have good in-depth uniformity. The selected area electron diffraction (SAED) found that the nanosize Cu particles have the fcc structure and the others are amorphous carbon or nanocrystallized graphitic carbon. The peak positions of the Cu and C in XPS indicate them to be at the elemental state. In the JR transmission spectrum, diamond two-phonon absorption and graphite Reman peaks were observed, which suggests microcrystal diamond particles and graphite components exrist in the C-Cu film. The higher electrical resistivity was obtained.Y.N. Sun, K.X. Zhang, X. Gao, D. Q. Yang, Z.D. Lin and Y. Guo Lauzhou Institute of Physics, P.O. Box 94, Lanzhou 730000, China 2002Acta Metallurgica Sinica(English Letters)2002,15,2:2
19Enhanced high‐mobility group box 1 ( HMGB 1) modulates regulatory T cells ( T reg)/ T helper 17 ( T h17) balance via toll‐like receptor ( TLR )‐4‐interleukin ( IL )‐6 pathway in patients with chronic hepatitis B显示文摘J. Li F.‐P. Wang W.‐M. She C.‐Q. Yang L. Li C.‐T. Tu J.‐Y. Wang W. Jiang 2014J Viral Hepat2014,,2:2
20Ligation of the intersphincteric fistula tract plus a bioprosthetic anal fistula plug ( LIFT ‐Plug): a new technique for fistula‐in‐ano显示文摘J. G. Han B. Q. Yi Z. J. Wang Y. Zheng J. J. Cui X. Q. Yu B. C. Zhao X. Q. Yang 2013Colorectal Dis2013,,5:2
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