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腹部多层CT能否诊断脊柱骨质疏松症?

国际医学放射学杂志 2009年第2期32卷 198-199页

作者： A.e Papadakis A.h.Karantanas G.Papadokostakis e.Petinellis J. Damilakisinellis 朱玉兆 Department of Medical Physics Faculty of MedicineUniversity of Crete

本研究的目的是根据腹部多层螺旋CT（MDCT）制定定量CT（QCT）的密度数据，并观察这些数据是否可用于区别健康女性和骨质疏松症病人。25例有放疗史的女病人（A组）接受常规腹部MDCT和标准QCT检查，得出MDCT与QCT的转换公式。21例骨质疏... 详细信息

本研究的目的是根据腹部多层螺旋CT（MDCT）制定定量CT（QCT）的密度数据，并观察这些数据是否可用于区别健康女性和骨质疏松症病人。25例有放疗史的女病人（A组）接受常规腹部MDCT和标准QCT检查，得出MDCT与QCT的转换公式。21例骨质疏松症病人（B组）和23名健康的女性（C组）也纳入本研究。B组和C组病人因不同的临床适应证行常规腹部MDCT检查。

关键词：骨质疏松症多层CT 腹部影像 CT密度测量影像分析

hIGh-ORDeR eXPLICIT TIMe-INTeGRATORS FOR DISCONTINUOUS GALeRKIN DISCReTIZATIONS OF The MAXWeLL eQUATIONS

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International Journal of Modeling, Simulation, and Scientific Computing 2013年第1期4卷 132-153页

作者： h.FAhS M.SAFA LAMA Laboratory University Paris-Est Marne-la-Vallee UMR CNRS 80505 boulevard Descartes 77454 Marne-la-Vall´ee Cedex 2France INRIA Paris-Rocquencourt Domaine de Voluceau BP.10578153 Le Chesnay CedexFrance

We investigate the practical imple.e.tation of a high-order explicit time-stepping method based on polynomial approximations,for possible application to large-scale problems in *** the spatial discretization by a high-order discontinuous Galerkin method,we obtain a linear system of diffe.e.tial equations of the form,∂tY(t)=hY(t)+S(t),whe.e.h is a matrix containing the spatial derivatives and t is the time *** formal solution can be written in terms of the matrix exponential,exp(th),acting on some *** introduce a ge.e.al family of time-integrators based on the approximation of exp(th)by Jacobi polynomial *** discuss the.e.ficient imple.e.tation of this technique,and based on some test problems,we compare the virtues and shortcomings of the *** also demonstrate how the.e.sche.e. provide an efficient alternative to standard explicit integrators for computing solutions over long time intervals.

关键词： Maxwell’s equations discontinuous Galerkin method time-stepping sche.e.

Regulating lithium nucleation and growth by zinc modified current collectors

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Nano Re.e.rch 2020年第1期13卷 45-51页

作者： Na Zhang Seung-ho Yu héctor D.Abruna Baker Laboratory Department of Chemistry and Chemical BiologyCornell UniversityIthacaNew York14853USA Department of Chemical and Biological engineering Korea University145 Anam-roSeongbuk-guSeoul02841Republic of Korea

Lithium metal is commonly regarded as the“holy Grail”anode material for high e.e.gy density rechargeable ***,the uncontrollable growth of Li dendrites has posed safety concerns and thus greatly hinde.e. its large-scale *** we have modified the surface of a commercial anode current collector,Cu foil,with a thin layer of Zn by a facile.e.ectroplating method,in order to regulate the Li nucleation and the following growth *** of the formation of a solid solution buffer layer and Li-Zn alloy phases,the Li nucleation overpotential was dramatically reduced,realizing a uniform Li nucleation and a smooth Li plating *** a result,significantly improved long-term cycling performance with a high Coulombic efficiency was achie.e. by the lithiophilic Zn coated Cu foil as a current *** cells of Li-LiFePO4 and Li-S using the Li deposited on the Zn modified Cu as the anode,showed increased capacity with low voltage hyste.e.is and greatly enhanced cycling stability,ascribed to the uniform Li deposition and formation of a stable SeI *** work demonstrates the feasibility of employing lithiophilic modified Cu foils as Li metal current collectors for practical applications.

关键词： lithium metal anode lithium dendrite current collector zinc layer

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制作1000mb面预报图的直接法

南京大学学报(自然科学版) 1959年第1期 103-109页

作者：徐尔灏

(一) 現时制作1000mb面預报图的方法(指图解法数值預报,下同)都是間接法,卽必須先計算其他变量的变化,而后方能計算1000mb面的变高。大多数方法是先計算500mb面的变高,如estoque(1956,1957a,1957b),Reed(1957,1958),以及作者提出的“第... 详细信息

(一) 現时制作1000mb面預报图的方法(指图解法数值預报,下同)都是間接法,卽必須先計算其他变量的变化,而后方能計算1000mb面的变高。大多数方法是先計算500mb面的变高,如estoque(1956,1957a,1957b),Reed(1957,1958),以及作者提出的“第二法”(1958b);亦有先計算500/1000mb厚度变化者,如作者所提出的“第一法”(1958a)。这种間接法的缺点有二:(1)制作1000mb預报图的手續及时間均因此大为增加。(2)制作预报图的误差是累积的,在間接法里制作其他变量預报图的誤差,最后必然使制作1000mb面预报图的誤差有不必要的增加,有时可能很大。如Reed(1957)

关键词：预报图直接法附图数值预报模式正压模式

体外循环术后追加鱼精蛋白可消除肝素反跳现象吗?

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世界核心医学期刊文摘（心脏病学分册） 2005年第1期1卷 59-60页

作者： Teoh K.h.T. Young e. Blackall M.h. 丁倩 Dept. of Pathol. and Molec. Medicine McMaster University And the Henderson Research Centre Hamilto n Ont. CanadaDr.

Objectives heparin rebound, the reappearance of anticoagulant activity after a dequate neutralization with protamine, is thought to contribute to excessive pos toperative bleeding after cardiac surgery. We have previously demon-strated tha t a significant amount of heparin is bound nonspecifically to plasma proteins an d is incomple.e.y neutralized by protamine. The aim of this study was to investi gate whether clinically important bleeding attributable to heparin rebound can b e.e.iminated by infusion of small amounts of additional protamine for 6 hours po stoperatively and whether this treatment can reduce mediastinal blood loss. Meth ods Three hundred patients undergoing e.e.tive cardiac surgery we.e.randomized t o re.e.ve.e.ther a continuous infusion of protamine sulphate(25 mg/h for 6 hours ) postoperatively or saline placebo. Serial blood samples we.e.obtained to measu re thrombin clotting time and anti-factor Xa activity. heparin bound nonspecifi cally to plasma proteins was measured after displace.e.t with a chemically alter ed heparin with low affinity to antithrombin. Mediastinal blood loss and transfu sion require.e.ts we.e.recorded. Results heparin rebound was demonstrated in e.e.ry patient in the placebo group as reflected by increased thrombin clotting time , anti-factor Xa activity, and protein-bound heparin between 1 and 6 hours aft er surgery. In contrast, heparin rebound was eliminated in the protamine infusio n group. The thrombin clotting time was normalized and both heparin concentratio n and protein-bound heparin we.e.almost unde.e.table (P he.e.was a mo dest 13%reduction in postoperative bleeding but this did not reduce blood trans fusions. No adverse.e.ents we.e.attributable to the.e.tra protamine. Conclusions Postoperative protamine infusion was able to almost totally abolish heparin reb ound. In the context of this study, protamine infusion resulted in reduced posto perative bleeding but the magnitude was insufficient to alter tra

关键词：肝素反跳现象鱼精蛋白输血量凝血时间安慰剂对照组蛋白结合血浆蛋白抗凝作用肝素化特异性

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羊毛地毯纱定捻技术——研发的基础

国际纺织导报 2014年第3期42卷 27-,40页

作者： e.A.Forbes J.-h.Dittrich 卢兰兰林肯大学 Leibniz大学

纳米技术的最新进展和行业现行的环保要求,再次掀起了羊毛地毯纱定捻方面技术创新的热潮.测量纱线定捻效果是这一发展的基石,但纱线扭转参数(如纱线扭矩)尚没有标准的测量方法,这便为其他一些相对实用的方法提供了机会.Wronz定捻测试仪(... 详细信息

纳米技术的最新进展和行业现行的环保要求,再次掀起了羊毛地毯纱定捻方面技术创新的热潮.测量纱线定捻效果是这一发展的基石,但纱线扭转参数(如纱线扭矩)尚没有标准的测量方法,这便为其他一些相对实用的方法提供了机会.Wronz定捻测试仪(Wronz Set Tester,简称WST)便是其中之一,它对独创的Chemset技术的发展具有重要作用,可令羊毛地毯的加工过程平稳,纱线质量明显提高.Mckinnon关于研发基础(包括WST推进创新的论述)正被弱化的观点,以及羊毛研究界偶尔一些常规知识的丢失,对今后的成功发展不会产生特别大的影响.

关键词：定捻地毯纱

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大容量的排水设备的电动机起动情况的研究

煤炭工程 1958年第2期16卷 31-35页

作者： h.e.奥芬杰曾陶绍斌北京煤矿设计院

对大容量的排水设备的电动机当排水管路中的闸阀在各种开启程度时的,起动工况的研究工作,几乎是没有人从事过.顿涅茨煤炭科学研究院所进行的工作,在某些程度上,填补了这一方面的空白,此项工作对创造简单可靠的自动化排水设备给予了帮助... 详细信息

对大容量的排水设备的电动机当排水管路中的闸阀在各种开启程度时的,起动工况的研究工作,几乎是没有人从事过.顿涅茨煤炭科学研究院所进行的工作,在某些程度上,填补了这一方面的空白,此项工作对创造简单可靠的自动化排水设备给予了帮助.实验工作是在斯大林煤矿管理局斯大林矿务局第17—17БИС号矿井的主排水设备上进行的,该排水设备具有下列技术资料:水泵排水量300立方公尺/小时;压头660公尺水柱;测量高度575公尺;管路长度650公尺,排水管直径200公厘;电动机容量700千瓦;每分钟转数1450转;电压3000伏.

关键词：排水设备电动机起动排水管路矿井排水电动机容量立方公尺技术资料起动工况测量高度煤炭科学

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针织成衣新的研制成果

国际纺织导报 2005年第2期33卷 42-42,44-46页

作者： e.haase h.Rdel 徐载熊德累斯顿工业大学纺织服装研究所

在2003年的IMB,来自45个国家的718家企业在面积为 12万m2的展览会上展出了具有广泛需求的机器、设备、电子装置,以及成衣加工工艺、产业用纺织品和柔性材料的加工技术.参观者中几乎三分之一来自国外.本文对典型的技术予以介绍.

关键词：针织成衣制成产业用纺织品 2003年电子装置加工工艺加工技术柔性材料展览会

Preoperative se.e.tion of patients with colorectal cancerliver metastasis for hepatic re.e.tion

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World Journal of Gastroenterology 2016年第2期22卷 567-581页

作者： Rafif e Mattar Faisal A Al-alem e.e.Simoneau Mazen hassanain Department of Surgery College of MedicineKing Saud UniversityRiyadh 11461Saudi Arabia Department of Surgery McGill University Health CentreHepatopancreaticobiliary Research UnitMontrealQC H4A 3J1Canada Department of Oncology McGill University Health CenterMontrealQC H4A 3J1Canada

Surgical re.e.tion of colorectal liver metastases(CRLM) has a well-documented improve.e.t in survival. To be.e.it from this intervention, proper se.e.tion of patients who would be adequate surgical candidates becomes vital. A combination of imaging techniques may be utilized in the de.e.tion of the lesions. The criteria for re.e.tion are continuously evolving; currently, the require.e.ts that need be met to undergo re.e.tion of CRLM are: the anticipation of attaining a negative margin(R0 re.e.tion), whilst maintaining an adequate functioning future liver remnant. The timing of hepatectomy in regards to re.e.tion of the primary remains controversial; before, after, or simultaneously. This de.e.ds mainly on the tumor burden and symptoms from the primary tumor. The role of chemotherapy differs according to the re.e.tability of the liver lesion(s); no evidence of improved survival was shown in patients with re.e.table disease who re.e.ved preoperative chemotherapy. Pre.e.ce of extrahepatic disease in itself is no longer conside.e. a reason to preclude patients from re.e.tion of their CRLM, providing limited extra-hepatic disease, although this currently is an area of active investigations. In conclusion, we review the indications, the adequate se.e.tion of patients and perioperative factors to be conside.e. for re.e.tion of colorectal liver metastasis.

关键词： Colorectal cancer liver metastases Liverre.e.tion hepatectomy Patient se.e.tion Preoperative.e.ection