|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Modern approach to cholecysto-choledocholithiasis显示文摘Gallstones and common bile duct calculi are found to be associated in 8%-20% of patients, leading to possible life-threatening complications, such as acute biliary pancreatitis, jaundice and cholangitis. The gold standard of care for gallbladder calculi and isolated common bile duct stones is represented by laparoscopic cholecystectomy and endoscopic retrograde cholangiopancreatography, respectively, while a debate still exists regarding how to treat the two diseases at the same time. Many therapeutic options are also available when the two conditions are associated, including many different types of treatment, which local professionals often administer. The need to limit maximum discomfort and risks for the patients, combined with the economic pressure of reducing costs and utilizing resources, favors single-step procedures. However, a multitude of data fail to strongly demonstrate the superiority of any technique(including a two or multi-step approach), while rigorous clinical trials that include so many different types of treatment are still lacking, and it is most likely unrealistic to conduct them in the future. Therefore, the choice of the best management is often led by the local presence of professional expertise and resources, rather than by a real superiority of one strategy over another. | Lapo Bencini Cinzia Tommasi Roberto Manetti Marco Farsi | 2014 | World Journal of Gastrointestinal Endoscopy2014，6，2： | 28 |
| 2 | Angles-only initial relative orbit determination algorithm for noncooperative spacecraft proximity operations显示文摘This research furthers the development of a closed-form solution to the angles-only initial relative orbit determination problem for non-cooperative target close-in proximity operations when the camera offset from the vehicle center-of-mass allows for range observability.In previous work,the solution to this problem had been shown to be non-global optimal in the sense of least square and had only been discussed in the context of Clohessy–Wiltshire.In this paper,the emphasis is placed on developing a more compact and improved solution to the problem by using state augmentation least square method in the context of the Clohessy–Wiltshire and Tschauner–Hempel dynamics,derivation of corresponding error covariance,and performance analysis for typical rendezvous missions.A two-body Monte Carlo simulation system is used to evaluate the performance of the solution.The sensitivity of the solution accuracy to camera offset,observation period,and the number of observations are presented and discussed. | Baichun Gong Wendan Li Shuang Li Weihua Ma Lili Zheng | 2018 | Astrodynamics2018，2，3： | 20 |
| 3 | Intraoperative ERCP : 它在 laparoscopic 胆囊炎的时代有什么角色?显示文摘 In the treatment of patients with symptomatic cholelithiasis and choledocholithiasis (CBDS) detected during intraoperative cholangiography (IOC),or when the preoperative study of a patient at intermediate risk for CBDS cannot be completed due to the lack of imaging techniques required for confirmation,or if they are available and yield contradictory radiological and clinical results,patients can be treated using intraoperative endoscopic retrograde cholangiopancreatography (ERCP) during the laparoscopic treatment or postoperative ERCP if the IOC finds CBDS.The choice of treatment depends on the level of experience and availability of each option at each hospital.Intraoperative ERCP has the advantage of being a single-stage treatment and has a significant success rate,an easy learning curve,low morbidity involving a shorter hospital stay and lower costs than the two-stage treatments (postoperative and preoperative ERCP).Intraoperative ERCP is also a good salvage treatment when preoperative ERCP fails or when total laparoscopic management also fails. | Luis R Rábago Alejandro Ortega Inmaculada Chico David Collado Ana Olivares Jose Luis Castro Elvira Quintanilla | 2011 | World Journal of Gastrointestinal Endoscopy2011，3，12： | 13 |
| 4 | Difficult biliary cannulation: Historical perspective, practical updates, and guide for the endoscopist显示文摘Despite improvements in endoscopic technologies and accessories, development of advanced endoscopy fellowship programs, and advances in ancillary imaging techniques, biliary cannulation in endoscopic retrograde cholangiopancreatography(ERCP) can still be unsuccessful in up to 20% of patients, even in referral centers. Once cannulation has been deemed to be difficult, the risk of post-ERCP pancreatitis and technical failure inherently increases. A number of factors, including endoscopist experience and patient anatomy, have been associated with difficult biliary cannulation, but predicting a case of difficult cannulation a priori is often not possible. Numerous techniques such as pancreatic guidewire and stenting, early pre-cut, and rendezvous may be employed when standard approaches fail. Data regarding the rate of success and adverse events of these techniques have been variable, though most studies suggest that pancreatic duct stenting generally reduces the rate of post-ERCP pancreatitis in instances of difficult biliary cannulation. Here we provide a review on difficult biliary cannulation and discuss how the choice of which techniques to employ and how to best employ them should be individualized and take into account the skill of the endoscopist, the disorder being treated, the anatomy of the patient, and the available biomedical literature. | Rani Berry James Y Han James H Tabibian | 2019 | World Journal of Gastrointestinal Endoscopy2019，11，1： | 8 |
| 5 | A preliminary study on dead geostationary satellite removal显示文摘The collision between satellites IRIDIUM 33 and COSMOS 2251 indicated that the clash of two on-orbit satellites was becoming an inevitable reality. Our calculation with the two-line orbit element by NORAD showed that some two geostationary satellites had approached very close in July 2009. Therefore, more attention should be given to avoid such collisions. This paper analyzes the orbital long-term variation of a dead satellite drifting in the geostationary orbit. Also, the negative effects posed by dead satellites upon the on-orbit operational geostationary satellites are studied. Then the paper proposes a novel idea to launch a satellite sweeper whose purpose is to collect the on-orbit dead satellites and help them de-orbit to a 'graveyard'. The satellite sweeper consists of a parent satellite and a child satellite. The child satellite collects a dead satellite and transfers it to a higher orbit. The parent satellite stationed in the geostationary orbit is in charge of refueling the child satellite. The strategy of maneuver and rendezvous is presented and a series of formulas are derived. The analysis results show that our method to clean the geostationary orbital zone is practical and fuel-saving. With the help of just a few satellite sweepers, we can gain a clean environment of geostationary orbit environment again. | LI YuHeng1, YANG KaiZhong2, SHAN ChengSheng2, LUO Dan2, GUAN Hui2, ZHENG Jun2, CHENG Hong2 & MAN Li2 1 Xidian University, Shaanxi 710071, China 2 Xi’an Satellite Control Center, Shaanxi 710043, China | 2010 | Science China(Technological Sciences)2010，53，12： | 7 |
| 6 | endoscopic ultrasonography-guided biliary drainage:Who,when,which,and how?显示文摘Both endoscopic ultrasonography(EUS)-guided choledochoduodenostomy( EUS- CDS) and EUS-guided hepaticogastrostomy(EUS-HGS) are relatively well established as alternatives to percutaneous transhepatic biliary drainage(PTBD). Both EUSCDS and EUS-HGS have high technical and clinical success rates(more than 90%) in high-volume centers. Complications for both procedures remain high at 10%-30%. Procedures performed by endoscopists who have done fewer than 20 cases sometimes result in severe or fatal complications. When learning EUSguided biliary drainage(EUS-BD), we recommend a mentor's supervision during at least the first 20 cases. For inoperable malignant lower biliary obstruction, a skillful endoscopist should perform EUS-BD before EUS-guided rendezvous technique(EUS-RV) and PTBD. We should be select EUS-BD for patients having altered anatomy from malignant tumors before balloon-enteroscope-assisted endoscopic retrograde cholangiopancreatography, EUS-RV, and PTBD. If both EUS-CDS and EUS-HGS are available, we should select EUS-CDS, according to published data. EUSBD will potentially become a first-line biliary drainage procedure in the near future. | Kazuo Hara Kenji Yamao Nobumasa Mizuno Susumu Hijioka Hiroshi Imaoka Masahiro Tajika Tutomu Tanaka Makoto Ishihara Nozomi Okuno Nobuhiro Hieda Tukasa Yoshida Yasumasa Niwa | 2016 | World Journal of Gastroenterology2016，22，3： | 4 |
| 7 | Comprehensive review on EUS-guided biliary drainage显示文摘Feasibility of endoscopic retrograde cholangiopancreatography(ERCP) for biliary drainage is not always applicable due to anatomical alterations or to inability to access the papilla. Percutaneous transhepatic biliary drainage has always been considered the only alternative for this indication. However,endoscopic ultrasonography-guided biliary drainage represents a valid option to replace percutaneous transhepatic biliary drainage when ERCP fails. According to the access site to the biliary tree,two kinds of approaches may be described: the intrahepatic and the extrahepatic. Endoscopic ultrasonography-guided rendezvous transpapillary drainage is performed where the second portion of the duodenum is easily reached but conventional ERCP fails. The recent introduction of self-expandable metal stents and lumen-apposing metal stents has improved this field. However,the role of the latter is still controversial. Echoendoscopic transmural biliary drainage can be challenging with potential severe adverse events. Therefore,trained endoscopists,in both ERCP and endoscopic ultrasonography are needed with surgical and radiological backup. | Raffaele Salerno Sophia Elizabeth Campbell Davies Nicolò Mezzina Sandro Ardizzone | 2019 | World Journal of Gastrointestinal Endoscopy2019，11，5： | 4 |
| 8 | Optimal impulsive ellipse-to-circle coplanar rendezvous显示文摘The problem of ellipse-to-circle coplanar rendezvous with chaser spacecraft in low eccentricity was investigated in this paper.With reference frame established in the centroid of the target spacecraft,the process of ellipse-to-circle coplanar rendezvous was described by the relative equations based on cy-lindrical reference frame,and then the solutions and distributions of optimal rendezvous models of a kind of close ellipse-to-circle coplanar rendezvous were provided.The simulation results showed that the guidance law based on the optimal rendezvous model in this research has good performance,and that the distributions of optimal rendezvous models of ellipse-to-circle coplanar rendezvous with the chaser spacecraft in low eccentricity are similar,albeit with slight difference,to those of rendezvous between close circular orbits.The work in this paper is a useful extension to Prussing's optimal ren-dezvous theory between close circular orbits. | CHEN ChangQing XIE YongChun | 2009 | Science China(Technological Sciences)2009，52，5： | 2 |
| 9 | Electrohydraulic lithotripsy and rendezvous nasal endoscopic cholangiography for common bile duct stone: A case report显示文摘BACKGROUND In patients with large stones in the common bile duct(CBD),advanced treatment modalities are generally needed.Here,we present an interesting case of a huge CBD stone treated with electrohydraulic lithotripsy(EHL)by the percutaneous approach and rendezvous endoscopic retrograde cholangiography(ERC)using a nasal endoscope.CASE SUMMARY A 91-year-old woman underwent ERC for a symptomatic large CBD stone with a diameter of 50 mm.She was referred to our institution after the failure of lithotomy by ERC,and after undergoing percutaneous transhepatic biliary drainage.We attempted to fragment the stone by transhepatic cholangioscopy using EHL.However,the stones were too large and partly soft clay-like for lithotripsy.Next,we attempted lithotomy with ERC and cholangioscopy by the rendezvous technique using a nasal endoscope and achieved complete lithotomy.No complication was observed at the end of this procedure.CONCLUSION Cholangioscopy by rendezvous technique using a nasal endoscope is a feasible and safe endoscopic method for removing huge CBD stones. | Koichi Kimura Kensuke Kudo Tomoharu Yoshizumi Takeshi Kurihara Shohei Yoshiya Yohei Mano Kazuki Takeishi Shinji Itoh Noboru Harada Toru Ikegami Tetsuo Ikeda | 2019 | World Journal of Clinical Cases2019，7，10： | 2 |
| 10 | Saturated Adaptive Output-Constrained Control of Cooperative Spacecraft Rendezvous and Docking显示文摘This paper investigates the robust relative pose control for spacecraft rendezvous and docking with constrained relative pose and saturated control inputs.A barrier Lyapunov function is used to ensure the constraints of states,so that the computational singularity of the inverse matrix in control command can be avoided,while a linear auxiliary system is introduced to handle with the adverse effect of actuator saturation.The tuning rules for designing parameters in control command and auxiliary system are derived based on the stability analysis of the closed-loop system.It is proved that all closed-loop signals always keep bounded,the prescribed constraints of relative pose tracking errors are never violated,and the pose tracking errors ultimately converge to small neighborhoods of zero.Simulation experiments validate the performance of the proposed robust saturated control strategy. | Liang Sun | 2019 | IEEE/CAA Journal of Automatica Sinica2019，6，6： | 2 |
| 11 | Endoscopic salvage therapy after failed biliary cannulation using advanced techniques:A concise review显示文摘Therapeutic endoscopic retrograde cholangiopancreatography(ERCP)begins with successful biliary cannulation.However,it is not always be successful.The failure of the initial ERCP is attributed to two main aspects:the papilla/biliary orifice is endoscopically accessible,or it is inaccessible.When the papilla/biliary orifice is accessible,bile duct cannulation failure can occur even with advanced cannulation techniques,including double guidewire techniques,transpancreatic sphincterotomy,needle-knife precut papillotomy,or fistulotomy.There is currently no consensus on the next steps of treatment in this setting.Therefore,this review aims to propose and discuss potential endoscopic options for patients who have failed ERCP due to difficult bile duct cannulation.These options include interval ERCP,percutaneous-transhepatic-endoscopic rendezvous procedures(PTE-RV),and endoscopic ultrasound-assisted rendezvous procedures(EUS-RV).The overall success rate for interval ERCP was 76.3%(68%-79% between studies),and the overall adverse event rate was 7.5%(0-15.9% between studies).The overall success rate for PTE-RV was 88.7%(80.4%-100%between studies),and the overall adverse event rate was 13.2%(4.9%-19.2% between studies).For EUS-RV,the overall success rate was 82%-86.1%,and the overall adverse event rate was 13%-15.6%.Because interval ERCP has an acceptably high success rate and lower adverse event rate and does not require additional expertise,facilities,or other specialists,it can be considered the first choice for salvage therapy.EUS-RV can also be considered if local experts are available.For patients in urgent need of biliary drainage,PTE-RV should be considered. | Yung-Kuan Tsou Kuang-Tse Pan Mu Hsien Lee Cheng-Hui Lin | 2022 | World Journal of Gastroenterology2022，28，29： | 1 |
| 12 | Optimal terminal-time determination for the ZEM/ZEV feedback guidance law with generalized performance index显示文摘This paper investigates a problem of determining the optimal terminal-time or time-to-go of the ZEM/ZEV(Zero-E ort-Miss/Zero-E ort-Velocity)feedback guidance law for a variety of orbital intercept or rendezvous maneuvers.A generalized ZEM/ZEV guidance problem,whose objective is to minimize a combination of the control energy and terminal time,is examined.Algebraic equations whose solution provides the optimal terminal-time of the orbital intercept/rendezvous problems are derived based on the optimal control theory.The e ectiveness of the proposed approach is demonstrated for various orbital maneuver problems. | Jaemyung Ahn Pengyu Wang Yanning Guo Bong Wie | 2019 | Astrodynamics2019，3，2： | 1 |
| 13 | Two-dimensional launch window method to search for launch opportunities of interplanetary missions显示文摘Accurate and highly efficient approaches to obtain mission opportunities are still the goals of mission planners of interplanetary explorations.The search for launch opportunities not only determines the specified launch window of the mission but also presents the performance requirements for the interplanetary probe and its launch vehicle.An effective method, namely the two-dimensional launch window method, is developed from a completely new perspective to determine all the launch opportunities of the mission in this research.For a fixed launch time,the method to determine all the time windows in the dimension of Time-of-Flight(TOF) is firstly proposed and these time windows represent all the launch opportunities for the given launch time.And then, the two-dimensional launch window method is proposed, which computes the time windows in both the launch time and TOF dimensions to achieve all launch opportunities of the mission.Numerical examples are provided to demonstrate the accuracy and high efficiency of the method.Compared with the widely-used pock-chop plot method, the proposed method reduces the computational time by two orders of magnitude for the same search precision, and thus is especially suitable for the cases involving rapid, high-precision, and/or large-scale searches for mission opportunities. | Junhong DUAN Yuefeng LIU | 2020 | Chinese Journal of Aeronautics2020，33，3： | 1 |
| 14 | Surgical treatment of a rare complication after endoscopic stent placement for anastomotic leakage after esophageal resection显示文摘The best approach to achieve cure in esophageal cancer is a combination of chemo-radiation and surgery. However, complications occur in half of patients. The current report, reports a rare but severe complication: Complete obstruction of the esophagus, induced by preoperative chemo-radiation therapy. Normally, strictures are treated by repeated dilatations, however, in case of complete obstruction, the perforation rate of standard blind anterograde wire access and dilation is severely increased. In order to minimize the risk of perforations, the rendezvous technique was introduced. This technique involves an anterograde approach in combination with a retrograde approach in order to open and dilatate the esophagus. While technical success rates between 83% and 100% have been reported in literature, data on clinical outcomes are scarcer. The limited amount of studies available claim that success was achieved in almost half of patients. The patient in our case currently has an oral diet without restrictions and rates his quality of life with a VAS-score ten out of ten. | Marjan Klinkert Mechteld C de Jong Meindert N Sosef Annick B van Nunen Henricus J Belgers | 2017 | World Journal of Surgical Procedures2017，7，1： | 1 |
| 15 | Combined radiologic and endoscopic treatment(using the “rendezvous technique”) of a biliary fistula following left hepatectomy显示文摘Despite the ongoing decrease in the frequency of complications after hepatectomy, biliary fistulas still occur and are associated with high morbidity and mortality rates. Here, we report on an unusual technique for managing biliary fistula following left hepatectomy in a patient in whom the right posterior segmental duct joined the left hepatic duct. The biliary fistula was treated with a combined radiologic and endoscopic procedure based on the 'rendezvous technique'. The clinical outcome was good, and reoperation was not required. | Aurélien Gracient Lionel Rebibo Richard Delcenserie Thierry Yzet Jean-Marc Regimbeau | 2016 | World Journal of Gastroenterology2016，22，30： | 1 |
| 16 | Ada concurrent complexity metrics based on rendezvous relations | 王振宇 陈利 王志江 | 1996 | Progress in Natural Science:Materials International1996，6，3： | 1 |
| 17 | 台湾高速数据网络建设计划显示文摘台湾高速数据网络建设计划交通部科技情报所祝平作为台湾信息高速公路的基础建设,台湾电信总局参照国外信息技术的发展,考虑岛内信息市场的需求,拟订出台湾高速数据网络建设计划,将分三阶段实施。一、建设策略为适应台湾经济的发展,并带动台湾电信工业的发展,台湾提... | 祝平 | 1995 | 广西通信技术1995，，4： | 0 |
| 18 | 电流型鉴相四阶微分控制数字锁相环显示文摘锁相环有压控型与流控型两种,本文以电流型锁相环作为重点,研究电流型鉴相四阶微分控制数字锁相环的主要性能,提出了环路稳定的新条件,以便与一般压控型的同类型数字锁相环作比较,便于推广应用。 | 汤步和 | 1995 | 广西通信技术1995，，2： | 0 |
| 19 | 钦州市七号信令网规划浅议显示文摘钦州市七号信令网规划浅议钦州市邮电局陈武一、前言随着经济的发展,人们对通信网的要求越来越高。传统的电话网、电报网已不能满足要求,为此必须大力发展大容量高速度数据通信网、图象传送网以及近年讨论得最热的“信息高速公路”,这些网络都离不了信令,而现有的随路... | 陈武 | 1995 | 广西通信技术1995，，2： | 0 |
| 20 | 南 宁 可 视 图 文 系 统 简 介显示文摘南宁可视图文系统简介南宁电信计算机通信公司李力可视图文业务是一种人与计算机之间的交互型双向通信业务。它把电视、电话、数据通信和计算机结合在一起,为公众提供文字和静止图形的信息服务。这种服务正在改变人们生活、工作和学习的方式,成为现代迅速发展的业务之一... | 李力 | 1995 | 广西通信技术1995，，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员