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Enteroclysis : 当前的临床的价值

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World Journal of radiology 2013年第7期5卷 253-258页

作者： Adel Maataoui Thomas J Vogl Volkmar.jacobi M Fawad Khan Institute for Diagnostic and Interventional radiology Goethe University 60590 Frankfurt am Main Germany

AIM: To retrospectively analyze changes in clinical indication, referring medical specialty and detected pathology for small bowel double-contrast examinations. METHODS: Two hundred and forty-one (n = 143 females; n = 98 males; 01.01.1990-31.12.1990) and 384 (n = 225 females; n = 159 males; 01.01.2004-31.12.2010) patients underwent enteroclysis, respectively. All exami- nations were performed in standardized double-contrast technique. After placement of a nasojejunal probe distal to the ligament of Treitz, radiopaque contrast media followed by Xray negative distending contrast media were administered. Following this standardized projections in all four abdominal quadrants were acquired. Depending on the detected pathology further documentation was carried out by focused imaging. Examination protocols were reviewed and compared concerning requesting unit, indication and final report. rESULTS: Two hundred and forty-one examinations in 1990 faced an average of 55 examinations per year from 2004-2010. There was an increase of examinations for gastroenterological (33.6% to 64.6%) andpediatric (0.4% to 7.8%) indications while internal (29.0% to 6.0% for inpatients and from 16.6% to 9.1% for outpatients) and surgical (12.4% to 7.3%) referrals significantly decreased. 'Follow-up of Crohn’s disease' (33.1%) and 'bleeding/tumor search' (15.1%) represented the most frequent clinical indications. A total of 34% (1990) and 53.4% (2004-2010) examinations yielded pathologic findings. In the period 01.01.2004 -31.12.2010 the largest proportion of pathological findings was found in patients with diagnosed Crohn’s disease (73.5%), followed by patients with abdominal pain (67.6% with history of surgery and 52.6% without history of surgery), chronic diarrhea (41.7%), suspected Crohn’s disease (39.5%) and search for gastrointestinal bleeding source/tumor (19.1%). The most common pathologies diagnosed by enteroclysis were 'changes in Crohn’s disease' (25.0%) and 'adhesions /strictures' (

关键词： Inflammatory bowel diseases Fluoroscopy Double-Balloon enteroscopy Magnetic resonance imag- ing Helical computed tomography

利用DaVinci系统的计算机辅助腹腔镜结肠切除术:一项初步体会

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世界核心医学期刊文摘（胃肠病学分册） 2006年第1期2卷 25-25页

作者： Braumann C. jacobi C.A. Menenakos C. 尹勇 Department of Surgery Humbolt University of Berlin Schumannstr. 20/21 D - 10117 Berlin Germany Dr.

PUrPOSE: Telerobotic surgery is a developing and promising modality that highly improves the laparoscopic dexterity. We have performed more than 100 laparoscopic and thoracoscopic procedures since December 2002 with the aid of the Da Vinci robotic system. This study was designed to assess the value of robots in colonic laparoscopic surgery. We present our first cases of robotic- assisted colectomies. METHODS: Two patients underwent a telerobotic- assisted sigmoidectomy for sigmadiverticulitis. One of these cases was complicated with a sigmoid- bladder fistula. Three other patients were submitted to a colon resection for cancer: sigmoidectomy (n = 2), and right colectomy (n = 1). A four- trocar technique was used for all operations. Tissue dissection of colonic adhesions, mobilization of the colon, management of the fistula, mesenteric mesenteric dissection and division, and bowel resection were fully performed with the telerobotic system. rESULTS: Three operations were completed using the Da Vinci system without any problems in acceptable times. In two patients, the operation had to be converted to laparotomy because of severe adhesions and locally extended tumor growth. Postoperative courses of all patients were uneventful. Patients were discharged between postoperative Days 9 and 20, and were well sixmonths later. CONCLUSIONS: Colonic telerobotic surgery can be performed safely. Benefits were seen during dissection of the rectum in the small pelvis. A major limitation is a lack of a large operation field especially if there is the need to dissect a colonic flexure in the upper abdomen. The enormous costs and the lack of appropriate instruments can be a major problem in the further expansion of the telerobotic surgery.

关键词： DaVinci 结肠切除术结肠手术胸腔镜手术腹腔镜操作结肠癌膀胱瘘憩室炎生理弯曲腔镜

Transaction-Level Modeling of a reconfigurable System on Chip for Wireless Sensor Networks

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通讯和计算机（中英文版） 2011年第1期8卷 31-42页

作者： Gilmar Silva Beserra Jose Edil Guimaraes de Medeiros Heider Marconi Guedes Madureira Juan Fernando Eusse Joao Lucas de Carvalho Carneiro ricardo Pezzuol jacobi Jose Camargo da Costa Department of Electrical Engineering University of Brasilia Brasilia DF 70919-970 Brazil

Evolution of Periodic Orbits in the Sun-Saturn System

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International Journal of Astronomy and Astrophysics 2016年第2期6卷 175-197页

作者： Niraj Pathak r. K. Sharma V. O. Thomas Department of Mathematics Dharmsinh Desai University Nadiad India Department of Aerospace Engineering Karunya University Coimbatore India Department of Mathematics Faculty of Science The Maharaja Sayajirao University of Baroda

We analyze the periodic orbits, quasi periodic orbits and chaotic orbits in the photo gravitational Sun-Saturn system incorporating actual oblateness of Saturn in the planar circular restricted three body problem. In this paper, we study the effect of solar radiation pressure on the location of Sun centered and Saturn centered orbits, its diameter, semi major axis and eccentricity by taking different values of solar radiation pressure q and different values of jacobi constant “C”, and by considering actual oblateness of Saturn using Poincare surface of section (PSS) method. It is ob-served that by the introduction of perturbing force due to solar radiation pressure admissible range of jacobi constant C decreases, it is also observed that as value of C decreases the number of islands decreases and as a result the number of periodic and quasi periodic orbits ***-ther, the periodic orbits around Saturn and Sun moves towards Sun by decreasing perturbation due to solar radiation pressure q for a specific choice of jacobi constant C. It is also observed that due to solar radiation pressure, semi major axis and eccentricity of Sun centered periodic orbit reduces, whereas, due to solar radiation pressure uniform change in semi major axis and eccen-tricity of Saturn centered periodic orbits is observed.

关键词： restricted Three Body Problem Sun-Saturn System Periodic Orbits Quasi Periodic Orbits Chaotic Orbits Photo Gravitation Oblateness Poincare Surface Section

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全局渐近稳定性的jacobi猜想的证明

数学学报（中文版） 2001年第5期44卷 849-856页

作者：陈彭年贺建勋秦化淑中国计量学院数学组浙江杭州310034 厦门大学系统科学系福建厦门361005 中国科学院数学与系统科学研究院系统科学研究所北京100080

设ｆ∈ Ｃ１（Ｒ２，Ｒ２），ｊ（０）＝０．设Ｄｆ（ｘ）为ｆ（ｘ）的Ｊａｃｏｂｉ矩阵．Ｊａｃｏｂｉ猜想称：如果　ｘ∈Ｒ２，Ｄｆ（ｘ）的特征值都具有负实部，则微分方程ｘ＝ｆ（ｘ）的零解全局渐近稳定．本文证明此猜想成立．

关键词：平面微分方程全局渐近稳定性全局单射性 jacobi猜想零解证明

沿一条确定的轨迹积分求解N维基态量子波函数的新方法

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物理 2001年第5期30卷 294-299页

作者： r.弗里德伯格李政道赵维勤哥伦比亚大学物理系美国纽约ny10027

介绍了一个沿着一条确定的轨迹积分求解N维基态量子波函数的新方法 .通过对哈密顿量的位势引入标度因子g2 ,将波函数和能量按 1 g展开 ,并应用求解经典的Hamilton -jacobi方程的方法 ,找到一条确定的轨迹 ,使薛定谔方程从二阶偏微分方... 详细信息

介绍了一个沿着一条确定的轨迹积分求解N维基态量子波函数的新方法 .通过对哈密顿量的位势引入标度因子g2 ,将波函数和能量按 1 g展开 ,并应用求解经典的Hamilton -jacobi方程的方法 ,找到一条确定的轨迹 ,使薛定谔方程从二阶偏微分方程化为一系列沿这条轨迹的一阶常微分方程 .基态波函数可以表示为沿这条确定轨迹的一系列积分 ,而能量则可以用位势极小值处的一系列微分表示 .在此基础上 ,导得一个全新的微扰展开系列和相应的N维量子波函数的格林函数 .作为例子 ,将此方法应用于库仑吸引位和斯塔克 (Stark)效应 .

关键词：轨迹积分子格林函数 N维基态量子波函数微扰展开系列标度因子库仑吸引位斯塔克效应

Chudania exposita的模式标本及其它几种隐脉叶蝉的雄性生殖器(同翅目,叶蝉总科,隐脉叶蝉科)

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昆虫分类学报 1988年第Z1期 55-64页

作者： Friedrich r.Heller

作者研究了Chudania exposita的模式标本,其外部形态及雄性外生殖器系首次发表,另外三种隐脉叶蝉Chudania delecta Dist., Sophonia pallida(Mel.)和Nirvana suturalis Melichar的雄性生殖器构造也是第一次描述。Sophonia pallida系一... 详细信息

关键词：雄性生殖器生殖器官 Chudania exposita 模式标本叶蝉

Dynamic Programming for Multidimensional Stochastic Control Problems

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Acta Mathematica Sinica,English Series 1999年第4期15卷 485-506页

作者： Jin Ma Department of Mathematics,Purdue University,West Lafayette,IN 47907-1395,U S A E-mail:majin@math.purdue,eduJiongmin Yong Laboratory of Mathematics for Nonlinear Science,Department of Mathematics,and Institute of Mathematical Finance,Fudan University,Shanghai 200433,P.r.China E-mail:jyong@fudan,*** Department of Mathematics Purdue University West Lafayette USA Laboratory of Mathematics for Nonlinear Science Department of Mathematics and Institute of Mathematical Finance Fudan University Shanghai P. R. China

In this paper we study a general multidimensional diffusion-type stochastic control problem. Our model contains the usual regular control problem,singular control problem and impulse control problem as special *** a unified treatment of dynamic programming,we show that the value function of the problem is a viscosity solution of certain Hamilton-jacobi-Bellman (HJB) quasi- variational *** uniqueness of such a quasi-variational inequality is proved.

关键词： Stochastic control Dynamic programming Viscosity solutions Singular control Impulse control

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谱逼近的某些新进展(英文)

数学进展 1999年第4期28卷 289-303页

作者：郭本瑜上海大学数学系中国上海201800

本文综述谱逼近的某些新进展．非线性计算不稳定性，数据的不连续性和解的奇异性会破坏谱方法的高精度．各种滤波方法，本质不振荡多项式插值，正交逼近的重构造方法和某些Hilbert空间中的jacobi逼近被应用，它们使得谱方法更有效．

关键词： jacobi逼近谱逼近希尔伯特空间微分方程