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Passive expansion of sub-maximally dilated transjugular intrahepatic portosystemic shunts and assessment of clinical outcomes

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World Journal of Hepatology 2017年第12期9卷 603-612页

作者： michael c hsu charles N Weber S William Stavropoulos Timothy W clark Scott O Trerotola Richard D Shlansky Goldberg michael c Soulen Gregory J Nadolski Department of Radiology Division of Interventional RadiologyMount Sinai Hospital Department of Radiology Division of Interventional RadiologyHospital of the University of Pennsylvania

AIM To assess for passive expansion of sub-maximally dilated transjugular intrahepatic portosystemic shunts(TIPS) and compare outcomes with maximally dilated *** Polytetrafluoroethylene covered TIPS(Viatorr) from July 2002 to December 2013 were retrospectively reviewed at two hospitals in a single institution. Two hundred and thirty patients had TIPS maximally dilated to 10 mm(m TIPS), while 43 patients who were at increased risk for hepatic encephalopathy(HE), based on clinical evaluation or low pre-TIPS portosystemic gradient(PSG), had 10 mm TIPS sub-maximally dilated to 8 mm(sm TIPS). Group characteristics(age, gender, Model for End-Stage Liver Disease score, post-TIPS PSG and clinical outcomes were compared between groups, including clinical success(ascites or varices), primary patency,primary assisted patency, and severe post-TIPS HE. A subset of fourteen patients with sm TIPS underwent follow-up computed tomography imaging after TIPS creation, and were grouped based on time of imaging( 6 mo). change in diameter and crosssectional area were measured with 3D imaging software to evaluate for passive *** Patient characteristics were similar between the sm TIPS and m TIPS groups, except for pre-TIPS portosystemic gradient, which was lower in the sm TIPS group(19.4 mm Hg ± 6.8 vs 22.4 mm Hg ± 7.1, P = 0.01). Primary patency and primary assisted patency between sm TIPS and m TIPS was not significantly different(P = 0.64 and 0.55, respectively). Four of the 55 patients(7%) with sm TIPS required TIPS reduction for severe refractory HE, while this occurred in 6 of the 218 patients(3%) with m TIPS(P = 0.12). For the 14 patients with follow-up computed tomography(cT) imaging, the median imaging follow-up was 373 d. There was an increase in median TIPS diameter, median percent diameter change, median area, and median percent area change in patients with cT follow-up greater than 6 mo after TIPS placement compared to follow-up within 6 mo(

关键词： Variceal hemorrhage Portal hypertension Transjugular intrahepatic portosystemic shunts Ascites Sub-maximal dilation Underdilated Passive expansion Hepatic encephalopathy

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顾客满意吗?影响中国餐馆服务费比例的一项实证研究

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南大商学评论 2004年第1期4卷 141-156页

作者： michael c.hsu 南京大学商学院

服务费,在西方称为小费。小费(保证服务快捷)一般被认为是对优秀服务的激励性的奖励。本课题重点研究了与顾客给服务员小费比例相关的因素。论文分析了一些特定的导致"小费级别"的特殊的变量。"小费级别"是一个尺度,可以反映顾客对于服... 详细信息

服务费,在西方称为小费。小费(保证服务快捷)一般被认为是对优秀服务的激励性的奖励。本课题重点研究了与顾客给服务员小费比例相关的因素。论文分析了一些特定的导致"小费级别"的特殊的变量。"小费级别"是一个尺度,可以反映顾客对于服务人员提供的服务所形成的感觉,并且可以方便餐馆管理者增加顾客的满意度。本文的方法论是一个建立在随机样本抽取和刻度值式问卷基础之上的调查。这个调查是在得克萨斯州的两家中国餐馆——KimSon 和 Panda Garden 中进行的。种族背景、服务质量和顾客满意度明显与小费比例有关。食物的价值、环境的整洁程度和顾客的总体满意度是小费比例的预报器。最后,小费级别确实是以小费比例为基础的服务质量和顾客满意度重要的表现。

关键词：餐馆小费服务质量顾客满意度

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Magnetic Heat Transfer Enhancements on Fin-Tube Heat Exchangers

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力学季刊 2007年第4期28卷 576-582页

作者： c.T.hsu Dept.of Mechanical Engineering Hong Kong University of Science and TechnologyClear Water BayHowloonHong Kong

通过DNS方法解耦合的三维非稳态流动和固流体能量方程组,本文研究了两平行磁质平板和圆管所组成的肋片式圆管换热器单元与震荡流体间的传热过程。对不同的磁场频率和振幅的三维动态流热场的模拟结果表明增强磁场频率和振幅能很有效地增... 详细信息

通过DNS方法解耦合的三维非稳态流动和固流体能量方程组,本文研究了两平行磁质平板和圆管所组成的肋片式圆管换热器单元与震荡流体间的传热过程。对不同的磁场频率和振幅的三维动态流热场的模拟结果表明增强磁场频率和振幅能很有效地增加周期平均传热强度达到强化传热的目的。

关键词：磁场强化传热震荡流 DNS方法

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Exact recession velocity and cosmic redshift based on cosmological principle and Yang-Mills gravity

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chinese Physics c 2019年第10期43卷 105-111页

作者： Leonardo hsu Jong-Ping hsu college of Education and Human Development University of MinnesotaMinneapolisMN 55455USA Department of Chemistry and PhysicsSanta Rosa Junior CollegeSanta RosaCA 95401USA Department of Physics University of Massachusetts DartmouthNorth DartmouthMA 02747-2300USA

Based on the cosmological principle and quantum Yang-Mills gravity in the super-macroscopic limit, we obtain an exact recession velocity and cosmic redshift z, as measured in an inertial frame F≡F(t,x,y,z). For a matter-dominated universe, we have the effective cosmic metric tensor Gμν(t)=(B^2(t),-A^2(t),-A^2(t),-A^2(t)), A∝B∝t^1/2, where t has the operational meaning of time in F frame. We assume a cosmic action S≡Scos involving Gμν(t) and derive the ‘Okubo equation’ of motion, G^μν(t)■μS■νS-m^2=0, for a distant galaxy with mass m. This cosmic equation predicts an exact recession velocity, r=rH/[1/2+√1/4+r^2H^2/c0^2]co, where H=A(t)/A(t) and co=B/A, as observed in the inertial frame F. For small velocities, we have the usual Hubble's law r≈rH for recession velocities. Following the formulation of the accelerated Wu-Doppler effect, we investigate cosmic redshifts z as measured in F. It is natural to assume the massless Okubo equation, G^μν(t)■μψe■νψe=0, for light emitted from accelerated distant galaxies. Based on the principle of limiting continuation of physical laws, we obtain a transformation for covariant wave 4-vectors between and inertial and an accelerated frame, and predict a relationship for the exact recession velocity and cosmic redshift, z=[(1+Vr)/(1-Vr^2)1/2]-1, where Vr=r/coctions of the cosmic model are consistent with experiments for small velocities and should be further tested.

关键词： Yang-Mills gravity recession velocity speed limit of recession velocity redshift

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Diamond breakage on cMP pad conditioner

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金刚石与磨料磨具工程 2008年第S1期28卷 115-118页

作者： Liu Ping-Hsiao Sung James c. hsu Kai-Hung Sung michael National Taipei University of Technology KINIK company 64Chung-San Rd.Ying-Kuo National Taiwan University Advanced Diamond Solutions Inc.351 King Street Suite 813San FranciscoCA 94158U.S.A.

Diamond grits may be thermally weakened during the high temperature cycle of *** weakening may exhibit as diamond *** the dressing action,taller diamond grits are more likely to break due to the higher stress present.

关键词： diamond brazing diamond breakage cMP pad conditioner

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cERTAIN ASYMPTOTIc EXPANSIONS FOR LAGUERRE POLYNOMIALS AND cHARLIER POLYNOMIALS

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Analysis in Theory and Applications 1995年第1期11卷 94-104页

作者： L. c. hsu Dalian University of Technology China

Here proposed are certain asymptotic expansion formulas for Ln(w-1)(λz) and cn(ω)(λz) in whichO(λ) and n = 0(λ1/2 )(λ→∞) , z being x complex number. Also presented are certain estimates for the remainders(erro... 详细信息

关键词： cERTAIN ASYMPTOTIc EXPANSIONS FOR LAGUERRE POLYNOMIALS AND cHARLIER POLYNOMIALS

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check of Earth's free oscillations excited by Sumatra-Andaman Large Earthquake and discussions on the anisotropy of inner core

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Science china Earth Sciences 2007年第6期50卷 909-917页

作者： hsu HouTse Key Laboratory of Dynamic Geodesy Institute of Geodesy and GeophysicsChinese Academy of SciencesWuhan 430077China

Sumatra-Andaman Large Earthquake on Dec. 26,2004 generated not only the Indian Ocean Tsunami but also the Earth's free oscillations (EFO). The signals of Earth's free oscillations were perfectly re-corded by the superconducting gravimeter c0-32 at Wuhan station in china. After the pre-treatment and spectral analysis on the observational data from Wuhan station,we obtained more than ninety EFO modes including 42 fundamental modes,2 radial modes and 49 harmonic modes. On the basis of the discussions on some observed harmonic modes and abnormal splitting phenomena,we considered that the real rigidity might be lower than the theoretical prediction of PREM model in the inner core and however the anisotropy of compressive wave was brightly higher than the present estimations in the inner core. This suggested that the anisotropy of the inner core could be much more complicated than our present understanding,and there might be some new geophysical phenomena in the formation process of the inner core.

关键词： Sumatra-Andaman Large Earthquake Earth’s free oscillations superconducting gravimeter abnormal spectral splitting anisotropy of inner core

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Detecting surface geostrophic currents using wavelet filter from satellite geodesy

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Science china Earth Sciences 2007年第6期50卷 918-926页

作者： hsu HouTse Institute of Geodesy and Geophysics Chinese Academy of Sciences (CAS)

According to the features of spatial spectrum of the dynamic ocean topography (DOT),wavelet filter is proposed to reduce short-wavelength and noise signals in DOT. The surface geostrophic currents calculated from the DOT models filtered by wavelet filter in global and Kuroshio regions show more detailed information than those from the DOT models filtered by Gaussian filter. Based on a satellite gravity field model (cG01c) and a gravity field model (EGM96),combining an altimetry-derived mean sea surface height model (KMSS04),two mean DOT models are estimated. The short-wavelength and noise signals of these two DOT models are removed by using wavelet filter,and the DOT models asso-ciated global mean surface geostrophic current fields are calculated separately. comparison of the surface geostrophic currents from cG01c and EGM96 model in global,Kuroshio and equatorial Pacific regions with that from oceanography,and comparison of influences of the two gravity models errors on the precision of the surface geostrophic currents velocity show that the accuracy of cG01c model has been greatly improved over pre-existing models at long wavelengths. At large and middle scale,the surface geostrophic current from satellite gravity and satellite altimetry agrees well with that from oceanography,which indicates that ocean currents detected by satellite measurement have reached relatively high precision.

关键词： satellite altimetry satellite gravity wavelet filter geostrophic current

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ANALYSIS AND MEASUREMENT OF STOKES LAYER FLOWS IN AN OScILLATING NARROW cHANNEL

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Journal of Hydrodynamics 2008年第6期20卷 770-775页

作者： PENG Xiao-xing hsu c. T. china Ship Scientific Research center Wuxi 214082 China Department of Mechanical Engineering The Hong Kong University of Science and Technology Hong Kong China

The velocities of boundary layer flows between two parallel oscillating plates separated by small distance, i.e., in so called narrow channel, were theoretically and experimentally studied. The focus was on the laminar case where the Reynolds number ReA is much smaller than the transition value. The theoretical analysis of the Stokes layer in oscillating flow over a narrow channel was made first. Then Laser Doppler Velocimeter （LDV） was employed to measure the Stokes boundary layer above an oscillating flat plate and inside the oscillating narrow channel at various ReH numbers. At the same time, the phase angle difference along the vertical direction in both analysis and experiment were provided. The good agreements are shown between the measured results and the theoretical solution.

关键词： oscillation flow Stokes layer Laser Doppler Velocimeter (LDV) narrow channel

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concerning Two Formulaic classes in computational combinatorics

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Journal of Mathematical Research with Applications 2012年第2期32卷 127-142页

作者： Leetsch c.hsu School of Mathematical Sciences Dalian University of Technology

Here introduced and studied are two formulaic classes consisting of various combinatorial algebraic identities and series summation *** basic ideas include utilizing properly the-operator and Stirling numbers for some series transformations.A variety of classic formulas and remarkable identities are shown to be the members of the classes.

关键词： difference operator Newton-type series -operational series transformation summation formula combinatorial identity.

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