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| 1 | Separation of closely spaced modes by combining complex envelope displacement analysis with method of generating intrinsic mode functions through filtering algorithm based on wavelet packet decomposition显示文摘One of the important issues in the system identification and the spectrum analysis is the frequency resolution, i.e., the capability of distinguishing between two or more closely spaced frequency components. In the modal identification by the empirical mode decomposition (EMD) method, because of the separating capability of the method, it is still a challenge to consistently and reliably identify the parameters of structures of which modes are not well separated. A new method is introduced to generate the intrinsic mode functions (IMFs) through the filtering algorithm based on the wavelet packet decomposition (GIFWPD). In this paper, it is demonstrated that the GIFWPD method alone has a good capability of separating close modes, even under the severe condition beyond the critical frequency ratio limit which makes it impossible to separate two closely spaced harmonics by the EMD method. However, the GIFWPD-only based method is impelled to use a very fine sampling frequency with consequent prohibitive computational costs. Therefore, in order to decrease the computational load by reducing the amount of samples and improve the effectiveness of separation by increasing the frequency ratio, the present paper uses a combination of the complex envelope displacement analysis (CEDA) and the GIFWPD method. For the validation, two examples from the previous works are taken to show the results obtained by the GIFWPD-only based method and by combining the CEDA with the GIFWPD method. | Y.S.KIM 陈立群 | 2013 | Applied Mathematics and Mechanics(English Edition)2013，34，7： | 3 |
| 2 | Effects of Weaving Laser on Weld Microstructure and Crack for Al 6k21-T4 Alloy显示文摘For Al 6k21-T4 overlap weld joint,the shear-tensile strength by using the weaving laser was improved as compared to the case of linear laser.For the specimen of low strength,the porosity was distributed continuously along the intersection between the plates and fusion line.However,for the optimized welding condition,large oval-shaped porosities were located only in the advancing track of the concave part.Therefore,the continuity of cracks and porosities played a key role to determine the strength.And,the weaving width was also the important parameter to control the strength.Furthermore,the concave part had more significant hot and cold cracking in the weld and heat-affected zone(HAZ),respectively,than the convex part. | B.H.Kim N.H.Kang W.T.Oh C.H.Kim J.H.Kim Y.S.Kim Y.H.Park | 2011 | Journal of Materials Science & Technology2011，27，1： | 2 |
| 3 | 肝细胞癌的经皮射频消融:80例病人连续2期治疗分析显示文摘本研究探讨了一些病人需要连续2期经皮射频(RF)消融治疗肝细胞癌(HCC)的原因。回顾6a内1179例(1624次治疗)超声(US)引导下经皮RF消融治疗HCC的资料,对第1期治疗后需要第2期治疗的80例病人进行分析,研究其病案与CT随访的资料。评估了第2期治疗的理由及其结果。1642次经皮RF消融治疗HCC中需要第2期治疗的共80例(4.8%)。需第2期治疗的原因包括:由于病人或操作原因的技术性失败(n=26),因肿瘤残余造成的技术性失败(n=40), | H.Rhim Y.S.Kim D.Ghoi H.K.Lim K.Park 唐光健 | 2008 | 国际医学放射学杂志2008，31，5： | 2 |
| 4 | Fast reconstruction of digital holograms for extended depths of field显示文摘Past research has demonstrated that a static, three-dimensional(3D) object scene can be directly recorded as a complex digital hologram. However, numerical reconstruction of the object scene, which may comprise multiple sections located at unknown distances from the hologram, is a complicated and computation-intensive process.To the best of our knowledge, we propose, for the first time, a low complexity method that is capable of reconstructing a complex hologram, such that sections at different depths in the 3D object scene can be automatically reconstructed at the correct focal distances and merged into a single image for an extended depth of field. We demonstrate an order of magnitude increase of the depth of field for binary objects. With the use of a graphical processing unit, the reconstruction of a 512 × 512 complex hologram can be accomplished in about 100 ms,equivalent to around 10 frames per second. | P.W.M.Tsang T.-C.Poon T.Kim Y.S.Kim | 2016 | Chinese Optics Letters2016，14，7： | 1 |
| 5 | Fabrication and characterization of heteropolyacid (H3PW12O40)/directly polymerized sulfonated poly(arylene ether sulfone) copolymer composite membranes for higher temperature fuel cell applications显示文摘 | Y.S.Kim F.Wang M.Hickner T.A.Zawodzinski J.E.McGrath | | 0，，： | 1 |
| 6 | 查看详情显示文摘 | Y.S.Kim S.M.Yang | | 0，，： | 1 |
| 7 | Ultra-wideband bandpass filter with improved upper stopband performance using defected ground structure显示文摘 | J.K.Lee Y.S.Kim | | 0，，： | 1 |
| 8 | Mechanism for the inhibition of the carboxyltransferase domain of acetyl-coenzyme A carboxylase by pinoxaden显示文摘 | L.P.YU Y.S.KIM L.TONG | | 0，，： | 1 |
| 9 | 小的(5~10mm)肝脏动脉期强化结节CT随访结果和可进展为肝细胞癌监测人群的危险因素显示文摘 | M.J.Park Y.S.Kim W.J.Lee H.K.Lim H.Rhim J.Lee 何岸苇 | 2010 | 国际医学放射学杂志2010，，06： | 1 |
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