检索结果-南通市图书馆

salvage locoregional therapies for recurrent hepatocellular carcinoma

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2023年第3期29卷 413-424页

作者： Cody R Criss Mina s Makary Heritage College of Osteopathic Medicine Ohio UniversityAthensOhio 45701United States Department of Radiology The Ohio State University Wexner Medical CenterColumbusOhio 43210United States

Hepatocellular carcinoma(HCC)is the second most common cause of cancerrelated death *** the advent of screening efforts and algorithms to stratify patients into appropriate treatment strategies,recurrence rates remain *** contrast to first-line treatment for HCC,which relies on several factors,including clinical staging,tumor burden,and liver function,there is no consensus or general treatment recommendations for recurrent HCC(R-HCC).Locoregional therapies include a spectrum of minimally invasive liver-directed treatments which can be used as either curative or neoadjuvant therapy for ***,we provide a comprehensive review of recent evidence using salvage loco-regional therapies for R-HCC after failed curative-intent.

关键词： Recurrent hepatocellular carcinoma Locoregional therapy Transarterial chemoembolization Transarterial embolization Transarterial radioembolization Ablation salvage therapy

Recent results on stochastic hybrid dynamical systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Control and Decision 2016年第1期3卷 68-103页

作者： Mohamad s.Alwan Xinzhi Liu Department of Applied Mathematics University of WaterlooWaterlooCanada

This paper addresses stochastic hybrid systems,particularly switched and impulsive *** systems under consideration are linear and non-linear continuous with/without time delay,and with/without external *** importance of using such systems and the discrepancies between hybrid and non-hybrid systems are *** objective of this paper is to survey recent developments on some of the important qualitative properties such as stability,stabilisation,input-to-state stability and state estimation along with the challenges that might arise when taking hybridness into *** properties are mainly developed by using the direct method of Lyapunov or Lyapunov-Razumikhin if time delay is taken into *** examples with simulations are presented to further clarify the results introduced in this paper.

关键词： stochastic hybrid systems stability stabilisation Iss state estimation Lyapunov method

Constrained controllability of nonlinear neutral fractional integrodifferential systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Control and Decision 2017年第2期4卷 81-99页

作者： s.Divya K.Balachandran Department of Mathematics Bharathiar UniversityCoimbatoreIndia

In this paper,we study the complete controllability for a class of nonlinear neutral fractional integro-differential systems in a finite interval of time by means of controls whose initial and final values can be assigned in *** result is achieved using the Banach fixedpoint theorem and schauder’s fixed-point *** numerical examples are provided to demonstrate the effectiveness of the main result.

关键词： Constrained controllability neutral fractional integrodifferential equations fixed point theorem

Energy Based Random Repeat Trust Computation in Delay Tolerant Network

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer systems science & Engineering 2023年第9期46卷 2845-2859页

作者： s.Dheenathayalan B.Paramasivan National Engineering College Kovilpatti628503India

As the use of mobile devices continues to rise,trust administration will significantly improve security in routing the guaranteed quality of service(Qos)supply in Mobile Ad Hoc Networks(MANET)due to the mobility of the *** is no continuance of network communication between nodes in a delay-tolerant network(DTN).DTN is designed to complete recurring connections between *** approach proposes a dynamic source routing protocol(DsR)based on a feed-forward neural network(FFNN)and energybased random repetition trust calculation in *** another node is looking for a node that swerved off of its path in this situation,routing will fail since it won’t recognize ***,in the suggested strategy,nodes do not stray from their pathways for *** is only likely that the message will reach the destination node if the nodes encounter their destination or an appropriate transitional node on their default mobility route,based on their pattern of *** EBRRTC-DTN algorithm(Energy based random repeat trust computation)is based on the time that has passed since nodes last encountered the destination *** to other existing techniques,simulation results show that this process makes the best decision and expertly determines the best and most appropriate route to send messages to the destination node,which improves routing performance,increases the number of delivered messages,and decreases delivery ***,the suggested method is better at providing better Qos(Quality of service)and increasing network lifetime,tolerating network system latency.

关键词： MANETs energy competent dynamic source routing protocol delay tolerant network energy-based random repeat trust computation quality of service network lifetime routing

Effect of process parameters on depth of penetration and topography of AZ91 magnesium alloy in abrasive water jet cutting

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2018年第4期6卷 366-374页

作者： C A Niranjan s srinivas M Ramachandra Department of Mechanical Engineering BMS College of EngineeringBengaluru-India

In the present study,the influence of dynamic process parameters such as water pressure,traverse speed and abrasive mass flow rate on depth of penetration and surface topography in high strength AZ91 magnesium alloy were investigated using Abrasive Water Jet(AWJ)cutting *** parameters were varied at 3 levels and influences of each parameter on penetration ability were identified using analysis of variance(ANOVA).Contribution of water pressure and traverse speed on jet penetration found higher compared to abrasive mass flow *** projector was used to measure depth of *** features and topography of cut surfaces were examined using scanning Electron Microscopy(sEM).Micro cutting and ploughing were observed on the top and bottom portion of the cut which were similar to that of modes of deformation in other ductile materials like aluminium and *** roughness of cut surfaces was measured using Taylor Hobson surface roughness *** roughness found higher at higher traverse speeds and lower at lower traverse *** study also highlights the suitability of AWJ cutting technology for cutting magnesium and its alloys.

关键词： AZ91 magnesium alloy Depth of penetration Profile projector Topography

Mathematical analysis of Phan-Thien-Tanner fluid model for blood in arteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Biomathematics 2015年第5期8卷 215-230页

作者： Noreen sher Akbar s. Nadeem INational University of sciences and Technology Islamabad Pakistan Department of Mathematics Quaid-i-Azam University45320 Islamabad 44000 Pakistan

In the present paper, we have studied the blood flow through tapered artery with a stenosis. The non-Newtonian nature of blood in small arteries is analyzed mathematically by considering the blood as Phan-Thien-Tanner fluid. The representation for the blood flow is through an axially non-symmetrical but radially symmetric stenosis. symmetry of the distribution of the wall shearing stress and resistive impedance and their growth with the developing stenosis is another important feature of our analysis. Exact solutions have been evaluated for velocity, resistance impedance, wall shear stress and shearing stress at the stenosis throat. The graphical results of different type of tapered arteries （i.e. converging tapering, diverging tapering, non-tapered artery） have been examined for different narameters of interest.

关键词： Phan-Thien-Tanner fluid blood flow tapered artery stenosis exact solu-tions.

Recent advances and current challenges in endoscopic resection with the full-thickness resection device

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2023年第25期29卷 4009-4020页

作者： Elijah J Mun Mihir s Wagh Division of Gastroenterology University of Colorado School of MedicineAuroraCO 80045United States Interventional Endoscopy Division of GastroenterologyUniversity of Colorado School of MedicineAuroraCO 80045United States

Endoscopic full-thickness resection(EFTR)has emerged as a viable technique in the management of mucosal and subepithelial lesions of the gastrointestinal tract(GIT)not amenable to conventional therapeutic *** various devices and techniques have been described for EFTR,a single,combined fullthickness resection and closure device(full-thickness resection device,FTRD system,Ovesco Endoscopy AG,Tuebingen,Germany)has become commercially available in recent ***,the FTRD system was limited to use in the colorectum ***,a modified version of the FTRD has been released for EFTR in the upper GIT as *** review provides a broad summary of the FTRD,highlighting recent advances and current challenges.

关键词： Endoscopic full-thickness resection Full-thickness resection device Colorectal neoplasm subepithelial lesions scarred non-lifting polyps

COMPUTATIONAL sIMULATION OF RIVER sEDIMENTATION AND MORPHOLOGY——A REVIEW OF THE sTATE OF THE ART

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of sediment Research 2005年第1期20卷 7-29页

作者： sam s. Y. WANG F.A.P. Barnard Distinguished Prof. National Center for Computational Hydroscience and Engineering Ms 38677 The University of Mississippi UsA

In this paper, the state-of-the-art computational simulation technologies for river sedimentation and morphology are comprehensively reviewed. Emphasis is on computational modelling, which includes mathematical modelling equations and closures, numerical solution methods, verification and validation, model integration, and applications. several important areas of future research are recommended.

关键词： River sedimentation Morphological processes Computational simulation

Endoscopic ultrasound in the diagnosis and treatment of pancreatic disease

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第29期20卷 9976-9989页

作者： Christopher W Teshima Gurpal s sandha Division of Gastroenterology University of AlbertaEdmontonAlberta T6G 2X8Canada

Endoscopic ultrasound(EUs)is an important part of modern gastrointestinal endoscopy and now has an integral role in the diagnostic evaluation of pancreatic ***,as EUs technology has advanced,it has increasingly become a therapeutic procedure,and the prospect of multiple applications of interventional EUs for the pancreas is truly on the near ***,this review focuses on the established diagnostic and therapeutic roles of EUs that are used in current clinical *** particular,the diagnostic evaluation of acute pancreatitis,chronic pancreatitis,cystic pancreatic lesions and solid masses of the pancreas are *** newer enhanced imaging modalities of elastography and contrast enhancement are evaluated in this *** main therapeutic aspects of pancreatic EUs are then considered,namely celiac plexus block and celiac plexus neurolysis for pain control in chronic pancreatitis and pancreas cancer,and EUs-guided drainage of pancreatic fluid collections.

关键词： Endoscopic ultrasonography Fine needle aspiration Pancreatic cyst Pancreatic neoplasms Pancreatitis