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肝脏恶性肿瘤经导管动脉化疗性栓塞术后-过性肝脏密度差异(THAD)系列CT检查的变化

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国际医学放射学杂志 2008年第5期31卷 417-418页

作者： S.H. Hwang j.S. Yu j. chung j.j. chung j.H .Kim K.W. Kim 叶锦棠（译）唐光健（校） Department of Diagnostic Radiology and Research Institute of Radiological Science Yonsei University College of Medicine YongDong Severance Hospital 146-92 Dogok-Dong Gangnam-Gu Seoul 135-720 Republic of Korea. 不详

本研究的目的是研究经导管动脉化疗栓塞术（TACE）引起的一过性肝脏密度差异（THAD）的自然病程变化。对32个月内32例经导管动脉化疗栓塞术治疗后的肝细胞癌病人在系列CT检查中发现的40处THAD进行了回顾性分析。THAD定义为肝脏cT动态扫... 详细信息

本研究的目的是研究经导管动脉化疗栓塞术（TACE）引起的一过性肝脏密度差异（THAD）的自然病程变化。对32个月内32例经导管动脉化疗栓塞术治疗后的肝细胞癌病人在系列CT检查中发现的40处THAD进行了回顾性分析。THAD定义为肝脏cT动态扫描（横断位，层厚1．9-8．8cm，平均4．9cm）肝动脉期在碘油堆积灶旁出现的局灶性、一过性、周围肝实质的强化。40处由TACE引发的THAD中，18处（45％）伴有动脉-门静脉瘘（APF），9处（23％）伴有门静脉狭窄（PVS），此外，

关键词：肝细胞癌 CT 化疗栓塞术

一种新型的丙烯酸微粒技术制备高性能皮革涂饰齐

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北京皮革（中外鞋讯）（下） 2012年第11期 85-91页

作者： j.HOEFLER() C. j. chung() B.HAOEMAN() E.LAFLEUR() 胡杨(编译) 不详四川大学制革清洁技术国家工程实验室四川成都610065

美国陶氏化学新近开发出的一种新型的丙烯酸微粒技术可用于皮革涂饰过程，制备高性能皮革涂饰剂。按该技术制备得到的皮革涂层具有低光泽度、高清晰度、手感柔软以及较高的物理强度等性能。该技术的核心元素在于丙烯酸颗粒能够赋予涂层... 详细信息

美国陶氏化学新近开发出的一种新型的丙烯酸微粒技术可用于皮革涂饰过程，制备高性能皮革涂饰剂。按该技术制备得到的皮革涂层具有低光泽度、高清晰度、手感柔软以及较高的物理强度等性能。该技术的核心元素在于丙烯酸颗粒能够赋予涂层与其它众多商业化的各类无机以及有机消光剂相当的光泽度、黑度以及其它各项性能。除此之外，从本质上讲，该技术无溶剂，且与现有的各类丙烯酸树脂、聚氨酯树脂及常规交联剂具有很好的兼容性。

关键词：皮革涂饰剂丙烯酸树脂微粒技术性能制备聚氨酯树脂陶氏化学高清晰度

三维剪切波弹性成像鉴别乳腺良恶性病变:与二维剪切波弹性成像的比较

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国际医学放射学杂志 2013年第4期 400-401页

作者： j.H. Youk H.M. Gweon E.j. Son j. chung j.A. Kim E. Kim 杨淑杰 Department of Radiology Gangnam Severance Hospital Yonsei University College of Medicine211 Eonju -roGangnam -Gu Seoul 135-720 South Korea

目的与2D剪切波弹性成像(SWE)相比,评估3DSWE对乳腺病变的诊断性能和观察者间一致性。方法共纳入146例活检前行B超和SWE的女性病人的163个乳腺病灶(恶性48个,良性115个)。2名影像医师阅读6组数据集(2D、3D下B超、SWE及两者的联合应用)... 详细信息

目的与2D剪切波弹性成像(SWE)相比,评估3DSWE对乳腺病变的诊断性能和观察者间一致性。方法共纳入146例活检前行B超和SWE的女性病人的163个乳腺病灶(恶性48个,良性115个)。2名影像医师阅读6组数据集(2D、3D下B超、SWE及两者的联合应用)。记录B超和SWE的特征。应用BI-RADS分类法分配B超和联合检查数据集。采用κ统计评估观察者间差异性。采用受试者操作特征(ROC)曲线下面积(AUC)评估每一数据集的诊断性能。结果 SWE显示具有足够甚至几乎完全的一致性,2DSWE的Ehomo较3DSWE更高。所有SWE特征的2DSWE的AUC较3DSWE的更高,尤其是Ecol(0.933∶0.867,P=0.002)和Emax(0.961∶0.874,P=0.006)更为明显。B超联合SWE后,2D超声的AUC显著增加(0.968∶0.912,P=0.008),而3D超声无显著差异(0.966∶0.935;P=0.07)。结论就3DSWE而言,其观察者间一致性良好,但即使加上B超之后其诊断性能仍逊于2DSWE。要点①SWE可在乳腺超声检查中提供更多诊断信息。②3DSWE的诊断性能逊于2DSWE。③3DSWE的观察者间一致性良好。④结合2DSWE的2DB超的诊断性能显著提高。⑤结合3DSWE的3DB超的诊断性能无明显提高。

关键词：乳腺超声弹性成像剪切波三维

Implementation of rotational resistance models＇ A critical appraisal

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Particuology 2017年第5期15卷 14-23页

作者： Xin Huang Kevin j. Hanley Catherine O'Sullivan chung-Yee Kwok a Department of Geotechnical Engineering Tongji University Shanghai 200092 China Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education Tongji University Shanghai 200092 China Institute for Infrastructure and Environment School of Engineering The University of Edinburgh Edinburgh EH9 3JL United Kingdom Skempton Building Department of Civil and Environmental Engineering Imperial College London London SW72AZ United Kingdom Haking Wong Building Department of Civil and Environmental Engineering The University ofHong Kong Hong Kong China

Contact models that simulate rotational resistance at particle contacts have been proposed as a means to capture the effect of shape in DEM simulations. This contribution critically explores some key issues related to the implementation of rotational resistance models; these include the need for physically meaningful model parameters, the impact of the model on the overall numerical stability/critical time increment for the DEM model, model validation, and the assessment of model performance relative to real physical materials. The discussion is centred around a rotational resistance model that captures the resistance provided by interlocking asperities on the particle surface. An expression for the maximum permissible integration time step to ensure numerical stability is derived for DEM simulations when rotational resistance is incorporated. Analytical solutions for some single-contact scenarios are derived for model validation. The ability of this type of model to provide additional fundamental insight into granular material behaviour is demonstrated using particle-scale analysis of triaxial compression simulations to examine the roles that contact rollin~ and slidin~ have on the stability of stron：~ force chains.

关键词： Granular mediaParticle shapeDiscrete element methodRollingTwistingRotational resistance

Development of a group support system to support collaborative works in value management workshops

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j.urnal of Harbin Institute of Technology(New Series) 2004年第1期11卷 91-97页

作者： chung j.K H Dept. of Building and Real Estate Hong Kong Polytechnic University Kowloon Hong Kong China

Value Management (VM) is a rigorous and systematic approach to improve the value and optimise the overall cost of a facility. It identifies opportunities to remove unnecessary costs while assuring that quality, reliability, performance, and other critical factors will meet or exceed the customers’ expectations. It has been widely used in the construction industry in a number of countries. A recent survey, however, revealed several problems that hinder the wider use of this methodology in the industry. To overcome these problems, a feasibility study has been conducted to investigate whether or not a Group Support System (GSS) can support collaborative works in VM workshops. This paper introduces the development and structure of a prototype GSS which is designed to support the collaborative works of stakeholders in VM workshops. It begins with an introduction to the conceptual GSS framework and j.b plan, illustrating what GSS supports can be provided to VM workshops. This is followed by a detailed description of the GSS prototype system to demonstrate how these supports can be performed as an integrated computer system. The testing of the system is also discussed. The research findings provide strong evidence in supporting the notion of using GSS to improve VM implementation. The information support of GSS has been ranked to be the most useful GSS functions and most of the practitioners interviewed are highly interested in applying GSS to support VM workshops in the future.

关键词： group support system value management workshops construction

Wavelet denoising via sparse representation

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Science in China(Series F) 2009年第8期52卷 1371-1377页

作者： ZHAO RuiZhen LIU XiaoYu Ching-chung LI Robert j. SCLABASSI & SUN MinGui Institute of Information Science Beijing Jiaotong University Beijing 100044 China Department of Neurosurgery University of Pittsburgh Pittsburgh PA 15261 USA Department of Electrical & Computer Engineering University of Pittsburgh Pittsburgh PA 15261 USA

Wavelet threshold denoising is a powerful method for suppressing noise in signals and images. However, this method often uses a coordinate-wise processing scheme, which ignores the structural properties in the wavelet coefficients. We propose a new wavelet denoising method using sparse representation which is a powerful mathematical tool recently developed. Instead of thresholding wavelet coefficients individually, we minimize the number of non-zero coefficients under certain conditions. The denoised signal is reconstructed by solving an optimization problem. It is shown that the solution to the optimization problem can be obtained uniquely and the estimates of the denoised wavelet coefficients are unbiased, i.e., the statistical means of the estimates are equal to the noise-free wavelet coefficients. It is also shown that at least a local optimal solution to the denoising problem can be found. Our experiments on test data indicate that this new denoising method is effective and efficient for a wide variety of signals including those with low signal-to-noise ratios.

关键词： signal processing denoising sparse representation wavelet transform

制作在不锈钢薄膜衬底上的柔性电子图书显示器

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现代显示 2006年第11期 45-48页

作者： S-H. Paek K-L. Kim H-S. Seo Y-S. j.ong S-Y. Yi S-Y. Lee N-B. Choi S-H. Kim C-D. Kim I-j. chung M.D. McCreary H. Gates j.Au 刘艳艳 LG.PhilipsLCD研发中心 LG.Philips LCD研发中心南开大学

2005年10月,***和EInk公司联合推出了一款10.1in的SVGA反射式柔性有源矩阵光电显示器,该显示器成功地制作在一个薄薄的不锈钢薄膜衬底上。该产品原型在外观上和手感上与真实的纸张极为相似,非常薄且轻,并且具有宽视角和高对比度。

关键词：电子图书柔性有源矩阵

Surface diffusivity of atomic deuterium on Ni_3(Al, Ti)(110) surface with and without boron

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中国有色金属学会会刊：英文版 2002年第4期12卷 649-652页

作者： j.L.Wang Y.W.chung DepartmentofMaterialsScienceandEngineering RobertR.McCormickSchoolofEngineeringandAppliedScienceNorthwesternUniversityEvanstonIL60208USA DepartmentofMaterialsScienceandEngineering RobertR.McCormic

The electron stimulated desorption was used to measure the surface diffusivity of atomic deuterium on clean and boron modified Ni 3(Al, Ti)(110) surfaces. Boron dosing was performed using a solid state boron ion source. Earlier studies showed that boron dissociates water readily at temperatures as low as 130?K and that the resulting atomic hydrogen is bound to the surface strongly. The surface diffusion coefficient of atomic D on 0.05 monolayer boron modified surface was measured to be about 10 times smaller than that on the clean surface. This slower diffusion of atomic hydrogen may explain why boron improves the ductility of polycrystalline Ni 3Al in moist environments.

关键词：氘原子表面扩散硼 Ni3Al Ni3Ti 金属间化合物

Precipitate Contribution to the Acoustic Nonlinearity in Nickel-Based Superalloy

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Chinese Physics Letters 2009年第8期26卷 219-222页

作者： chung-Seok KIM Cliff j. LISSENDEN Engineering Science and Mechanics The Pennsylvania State University 212 EES Bldg. University Park PA 16802 USA

The influence of γ′ precipitate on the acoustic nonlinearity is investigated for a nickel-based superalloy, which is subj.cted to creep deformation. During creep deformation, the cuboidal γ′ precipitate is preferentially coarsened in a direction perpendicular to the applied stress axis. The length and shape factor of the γ′ precipitate increase with creep time. The increase of relative acoustic nonlinearity with increasing fraction of creep life is discussed in relation to the rafting of γ′ precipitate, which is closely related to the scattering and distortion of the acoustic wave

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