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Continuous Lumbar Plexus Catheter Removal in Postoperative Total Hip Replacement Patients Receiving Warfarin Thromboprophylaxis: A Retrospective Analysis

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Open Journal of Anesthesiology 2013年第6期3卷 293-297页

作者： Joseph Marino Jay curtin Carol Patrick Kara Theal Cristina Sison George Koutsouras Scott Alpert W. Healy III Oonagh Dowling Renee Pekmezaris J. E. Chelly Biostatistics Unit The Feinstein Institute for Medical Research Manhasset USA Biostatistics Unit The Feinstein Institute for Medical Research Manhasset USA Department of Anesthesiology Franklin Hospital Medical Center Valley Stream USA Department of Anesthesiology Huntington Hospital Huntington USA Department of Cardiology Huntington Hospital Huntington USA Department of Information Services Huntington Hospital Huntington USA Department of Orthopedic Anesthesia and Acute Interventional Pain University of Pittsburgh School of Medicine Pittsburgh USA Department of Orthopedics Huntington Hospital Huntington USA Department of Population Health North Shore LIJ Health System Great Neck USA Department of Population Health North Shore LIJ Health System Great Neck USA

Background and Objectives: Based on the case reports of hemorrhagic complications, recommendations for the removal of lumbar plexus catheters in anticoagulated patients were created. These guidelines are controversial as they limit the use of lumbar plexus blocks in postoperative anticoagulated patients. This study was designed to evaluate the incidence of hemorrhagic complications and coagulation status using International Normalized Ratio (INR) at the time of lumbar plexus catheter removal in patients receiving warfarin after total hip replacement. Methods: A retrospective study of 371 patients on warfarin thromboprophylaxis who received continuous lumbar plexus catheters for postoperative analgesia after total hip surgery was performed. The primary outcome measure was the incidence of bleeding complications after catheter removal;secondary outcome measures included warfarin dose, bridge therapy, incidence of deep vein thrombosis, pulmonary embolism (DVT/PE) and INR values upon catheter removal. Results: Almost all lumbar plexus catheters (93%;344/371) were removed at 72 hours. At the time of catheter removal, mean INR was 1.99 [1.42-2.41] (p = 0.015);67% of patients had an INR > 1.5 and half of these patients had INRs between 2.0-3.0;5% had INR’s between 3.0-4.0. There were no adverse bleeding complications or nerve injury after the removal of catheters. Conclusions: We observed no incidence of bleeding after lumbar plexus catheter removal despite 67 % of patients demonstrating INR’s > 1.5. Our retrospective analysis illustrates the relative safety of catheter removal in anticoagulated patients and suggests that the removal of lumbar plexus catheters can be safely performed with an INR > 1.5 in patients receiving warfarin.

关键词： Lumbar Plexus Block Warfarin Prophylaxis Deep Vein Thrombosis Pulmonary Embolism

Face Recognition with Only One Training Sample

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Face Recognition with Only One Training Sample

第25届中国控制会议

作者： Lu Chong,Liu Wanquan, An Senjian Dept. of Computer Science, YiLi Normal College. Yining,China 835000 Dept. of Computing,curtin University of Technology,WA 6102

In this paper, we compare the face recognition performance for five different methods with using only one training sample. Firstly,we investigate the Singular Value Decomposition (SVD) of the face image and propose an augmenting algorithm via using only one sample to generate a group of training samples. Then we implement the methods of face recognition with Discrete Cosine Transform (DCT) and Two Dimensional Principal Component Analysis (2DPCA). Secondly,we implement face recognition approach via DCT directly with one training sample. Thirdly,we primarily use DCT to generate some low-frequency matrices in frequency domain and then converted into the spatial domain as independent training images. Then,2DPCA will be used for face recognition. Finally, we use DCT to generate some low-frequency matrices in frequency domain and use DCT to do face recognition. Experiments on the AMP and Yale face database show that the approach DCT+2DPCA produces better results on the AMP database. The approach SVD+2DPCA produces better result on Yale database.

关键词： SVD 2DPCA DCT face recognition classification

妊娠会影响CT肺血管成像检查的血管增强吗?

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国际医学放射学杂志 2009年第1期32卷 94-95页

作者： A.K. Andreou J.J. curtin S. Wilde A. Clark 马可云 Norfolk and Norwich University Hospital NHS Trust ColneyLaneNorwichNR47UYUK

目的是评价妊娠在CT肺血管成像（CTPA）检查中是否会影响肺动脉的对比增强。本研究回顾性分析了同一时期怀疑急性肺栓塞的16例妊娠病人及16名非妊娠妇女的CTPA检查．通过测量肺动脉的CT值来评价肺部血管的强化。本研究采用盲法评估，对... 详细信息

目的是评价妊娠在CT肺血管成像（CTPA）检查中是否会影响肺动脉的对比增强。本研究回顾性分析了同一时期怀疑急性肺栓塞的16例妊娠病人及16名非妊娠妇女的CTPA检查．通过测量肺动脉的CT值来评价肺部血管的强化。本研究采用盲法评估，对肺动脉对比增强做了主观分级。结果2组的动脉增强的差异有统计学意义。

关键词：妊娠肺栓塞 CT肺动脉成像

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应用于高热流冷却的微通道实验装置的研究(英文)

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计量学报 2002年第3期23卷 186-190页

作者：彭书志逖来科科廷理工大学机械系

本文详细介绍了微通道热沉实验装置的发展状态。建成了一个具有多功能、低不确定度、高精度温度控制的实验装置 ,用于模拟微通道热沉的实际热流状态和分析其热传导特性。最终测试实验借助于HP5 5 2 9A动态校准仪在恒温室中完成。测试结... 详细信息

本文详细介绍了微通道热沉实验装置的发展状态。建成了一个具有多功能、低不确定度、高精度温度控制的实验装置 ,用于模拟微通道热沉的实际热流状态和分析其热传导特性。最终测试实验借助于HP5 5 2 9A动态校准仪在恒温室中完成。测试结果表明 ,这个装置不仅有高的冷却效果 ,而且能满足微电子机械和纳米技术所需要的高精度温度的要求。

关键词：微通道实验装置惠普5529A动态校准仪微电子机械系统温度控制热沉实验

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The Qiyugou gold-bearing breccia pipes,Xiong'ershan region,central China:fluid-inclusion and stable-isotope evidence for an origin from magmatic fluids

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The Qiyugou gold-bearing breccia pipes,Xiong'ershan region,c...

中国科学院地质与地球物理研究所第11届（2011年度）学术年会

作者： Hong-Rui Fan~(a*),Fang-Fang Hu~a,Simon A.Wilde~b,Kui-Feng Yang~a and Chen-Wei Jin~a ~aKey Laboratory of Mineral Resources,Institute of Geology and Geophysics,Chinese Academy of Sciences,P.O.Box 9825,Beijing 100029,China ~bDepartment of Applied Geology, curtin University of Technology,GPO Box U1987,Perth 6845,Australia

Gold ores of the Qiyugou deposit in the eastern part of the Xiong’ershan region are hosted in breccia pipes within a Mesozoic granitic *** stages of hydrothermal alteration activity are recognized within the Qiyugou *** first stage of hydrothermal metasomatism produced extensive K-feldspar *** second stage is associated with deposition of gold and base metal *** third stage is defined by fine quartz-calcite±pyrite veinlets containing minor *** types of fluid inclusions are present in quartz and calcite within the breccia matrix and ***Ⅰare solid(s)-bearing high-salinity fluid inclusions,with homogenization temperatures up to 420℃and high salinities of 31-47 wt%NaCl ***Ⅱare two-phase,vapourrich fluid inclusions that homogenized between 265 and 476℃,with low to moderate salinities(7.2-19.8 wt%NaCl equivalent).Homogenization of TypeⅢtwo-phase, liquid-rich fluid inclusions takes place at temperatures between 109 and 253℃,with salinities of 3.9-14.3 wt%NaCl *** IV two/three-phase carbonic fluid inclusions are only found in calcite-quartz veins cutting wall rocks in the upper parts of the pipes or in adjacent country rocks,with homogenization temperatures that range from 239 to 315℃and salinities between 9.2 and 12.2 wt%NaCl *** coexistence of TypesⅠandⅡin the middle parts of the breccia pipes suggests that these fluid inclusions either resulted from trapping of boiling fluids or represented immiscible fluids, most likely derived from a granitic *** fluid history,reflected in the fluidinclusion characteristics,was complex,involving variable amounts of boiling,cooling and mixing in the breccia pipe system.δDo values(-101.7 to-60.1‰) andδ O(HO) values(0.3-7.5‰) calculated from inclusion water in quartz on the basis of mean-to-maximum fluid inclusion homogenization temperatures are intermediate between magmatic wat er and surface-derived fluids(meteoric water).Ranges forδS values o

关键词： fluid inclusion stable isotope gold-bearing breccia pipes Qiyugou Xiong’ershan region

Mesozoic decratonization of the North China block

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Mesozoic decratonization of the North China block

中国科学院地质与地球物理研究所2008学术年会

作者： Simon A.Wilde Elena Belousova william L.Griffin Department of Applied Geology Curtin University of TechnologyP.O.Box U1987PerthWestern Australia 6845Australia Australian Research Council's National Key Centre for Geochemical Evolution and Metallogeny of Continents(GEMOC) Department of Earth and Planetary SciencesMacquarie UniversityNew South Wales 2109Australia

Cratons are old,stable parts of the continental crust that have survived at least since Proterozoic time and have not undergone strong magmatism or tectonism since their stabilization. Traditionally,the growth of continental crust in the North China craton is considered to have been complete by Paleoproterozoic time,Phanerozoic events being largely restricted to surrounding orogenic ***,the eastern part of the North China craton contains large volumes of Mesozoic igneous rocks,with widespread metamorphic core complexes and pull-apart *** isotope compositions of magmatic zircon grains from igneous rocks in the Liaodong Peninsula indicate that widespread late Mesozoic granitoids formed by partial melting of ancient crust,but with significant input of a mantle component via magma mixing and crustal *** magmatism has resulted from removal and modification of lithospheric mantle,accompanied by asthenospheric *** Hf isotopic signatures thus record the addition of juvenile crust beneath the eastern part of the North China craton,which appears related to major extension and possibly slab rollback of the Pacific *** the mechanism,it is apparent that since ca.200 Ma,ancient lithosphere beneath the eastern North China craton has been progressively reactivated and replaced, resulting in"decratonization."Tertiary to Holocene volcanism in the area and major subsidence around the Gulf of Bohai suggest that the effects of the process are *** processes probably operated in the geological past,leading to significant modification of continental crust and requiring reconsideration of mechanisms for continental breakup and dispersal and of continental growth rates.

关键词： decratonization Phanerozoic crustal growth North China craton zircon Hf isotope magmatism

Dissipative Control for Linear Systems via PID Controller

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Dissipative Control for Linear Systems via PID Controller

第三十届中国控制会议

作者： WANG Shuping~1,ZHANG Guoshan~1,ZUO Zhiqiang~1 LIU Wanquan~2 1.School of Electrical Engineering and Automation,Tianjin University,Tianjin,300072,P.R.China 2.Department of Computing,curtin University,WA,6102,Australia

＜正＞In this paper a new type of proportional-integral-derivative（PID） controllers is designed to make the closed-loop linear system asymptotically stable and strictly quadratic ***,we give a state-space realization for such PID controller and then derive the state-space realization of closed-loop ***,a necessary and sufficient condition ensuring the closed-loop system to be asymptotically stable and quadratic dissipative is derived in terms of linear matrix inequality（LMI）. Based on this result,the explicit expression for the PID controller gains is ***,an illustrative example is given to demonstrate the effectiveness of the proposed design approach.

关键词： PID controller Dissipative control Linear systems Strictly quadratic dissipative

Dissipative Analysis and Control for Discrete-time State-space Symmetric Systems

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Dissipative Analysis and Control for Discrete-time State-spa...

第二十九届中国控制会议

作者： WANG Shuping1,ZHANG Guoshan1,LIU Wanquan2 1.School of Electrical Engineering and Automation,Tianjin University,Tianjin 300072,P.R.China2.The Department of Computing,curtin University of Technology,WA,6102,Australia

In this paper,the problem of dissipativity analysis and output feedback control synthesis for discrete linear time-invariant systems with state-space symmetry is ***,an explicit expression of H∞norm for discrete-time symmetric system is given under the mixed H∞and positive real performance criterion,and this is a particular case of dissipative ***,we consider the control synthesis problems for such systems and obtain an explicit parameterized expression of the static output feedback ***,two numerical examples are employed to show the effectiveness and reliableness of the proposed approach.

关键词： Dissipativity Analysis and Control Static Output Feedback Controller H∞NORM Positive Real Discrete-Time State-Space Symmetric Systems

一种系统性制造3D打印患者匹配式颅颌面重建植入物的方法

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Engineering 2020年第11期6卷 186-208页

作者：杜如虚苏宇雄颜瑜蔡颖珊杨伟发张春雨陈贤帅 Justin Paul curtin 欧阳江林张碧涛 Shien-Ming Wu School of Intelligent Engineering South China University of Technology Oral and Maxillofacial Surgery Faculty of Dentistry The University of Hong Kong Foshan Angels Biotechnology Co. Ltd.

通常,在头颈部外科中广泛应用的颅颌面重建植入物都被制造为标准样式。在手术过程中,医生必须手工弯折颅颌面重建植入物以匹配不同患者的骨骼解剖结构。弯曲植入物的过程非常耗时,尤其是对于一些缺乏经验的外科医生来说,很难操作。此外... 详细信息

通常,在头颈部外科中广泛应用的颅颌面重建植入物都被制造为标准样式。在手术过程中,医生必须手工弯折颅颌面重建植入物以匹配不同患者的骨骼解剖结构。弯曲植入物的过程非常耗时,尤其是对于一些缺乏经验的外科医生来说,很难操作。此外,反复的弯折可能会使得植入物内应力集中,在咀嚼载荷作用下易发生疲劳,最终导致植入物疲劳断裂、螺钉松动、骨吸收等并发症。目前已有一些关于3D打印颅颌面重建患者匹配式植入物的报道,但很少有人考虑到植入物的质量问题。在本文中,我们提出了一种制作颅颌面重建3D打印手术植入物的系统性方法。这一方法包括三个部分的内容:首先,我们基于Solid Works?软件开发出一个容易使用的设计模块,该模块可帮助外科医生设计手术用颅颌面重建植入物及其辅助工具;设计工程师可以在此基础上进行更详细的设计,并借助有限元模拟来优化设计。接着,制造过程可分为三个步骤进行:第一步检测原材料粉末,第二步设置适当参数进行3D打印,第三步对3D打印产品进行后处理(即热处理和表面处理)以保证植入物的质量和性能。最后,对植入物进行成品检测和消毒后用于颅颌面重建手术中,术后再使用患者信息追踪软件辅助术后康复随访。采用这种方法,目前我们已成功完成了41例手术。3D打印患者匹配式植入物有很多优点,能减少手术时间,加快患者恢复。此外,本文提出的方法也有助于保证植入物的质量安全。

关键词：患者匹配式植入物颅颌面重建 3D打印手术