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Numerical Research on The Stability of Launching Devices During Firing

Defence Technology（防务技术） 2013年第4期9卷 242-248页

作者： Pamfil ?OMOIAG cristian-emil moldoveanu Department of Weapon Systems Engineering and Mechatronics Military Technical Academy

An important problem in studying the sloped rocket launch is to determine the oscillations and their effects on the initial conditions of the rocket *** phenomenon influences the stability of the launching device and the firing *** is assumed that the launching device and the moving rocket form a complex oscillating system that join together into a sum of rigid bodies bound by elastic elements(the vehicle chassis,the tilting platform and the rockets in the containers).The calculations of the launching device oscillations during the launch by numerical methods are presented.

关键词：发射装置稳定性数值模拟火箭发射射击 TIFF格式振动系统发射设备

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Endoscopic or percutaneous biliary drainage in hilar cholangiocarcinoma:When and how?

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World Journal of Gastrointestinal Oncology 2021年第12期13卷 2050-2063页

作者： Tudor Mocan Adelina Horhat emil Mois Florin Graur cristian Tefas Rares Craciun Iuliana Nenu Mihaela Spârchez Zeno Sparchez Third Medical Department "Iuliu Hatieganu"University of Medicine and PharmacyCluj-Napoca 400162Romania Institute for Gastroenterology and Hepatology Cluj-Napoca 400162Romania Second Pediatric Department University of Medicine and Pharmacy"Iuliu Hatieganu"Cluj-Napoca 400162Romania

Hilar cholangiocarcinoma (hCCA) is a primary liver tumor associated with a dimprognosis. The role of preoperative and palliative biliary drainage has long beendebated. The most common techniques are endoscopic retrograde cholangiopancreatography(ERCP) and percutaneous transhepatic biliary drainage (PTBD);however, recently developed endoscopic ultrasound-assisted methods are gainingmore atention. Selecting the best available method in any specific scenario iscrucial, yet sometimes challenging. Thus, this review aimed to discuss theavailable techniques, indications, perks, pitfalls, and timing-related issues in themanagement of hCCA. In a preoperative setting, PTBD appears to have someadvantages: low risk of postprocedural complications (namely cholangitis) andbetter priming for surgery. For palliative purposes, we propose ERCP/PTBDdepending on the experience of the operators, but also on other factors: the levelof bilirubin (if very high, rather PTBD), length of the stenosis and the presence ofcholangitis (PTBD), ERCP failure, or altered biliary anatomy.

关键词： Hilar cholangiocarcinoma Endoscopic biliary drainage Percutaneous biliary drainage Endoscopic ultrasound biliary drainage Surgical oncology

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