检索结果-南通市图书馆

Transjugular intrahepatic portosystemic shunt for recompensating decompensated cirrhosis?

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 2024年第20期30卷 2621-2623页

作者： dimitrios S Karagiannakis Academic Department of Gastroenterology and Hepatology Medical School of National and Kapodistrian University of AthensGeneral Hospital of Athens“Laiko”Athens 11527Greece

Transjugular intrahepatic portosystemic shunt(TIPS)is a medical procedure that has been used to manage variceal bleeding and ascites in patients with *** can prevent further decompensation and improve the survival of high-risk decompensated *** research indicates that TIPS could increase the possibility of recompensation of decompensated cirrhosis when it is combined with adequate suppression of the causative factor of liver ***,the results of the studies have been based on retrospective analysis,and further validation is required by conducting randomized controlled *** this context,we highlight the limitations of the current studies and emphasize the issues that must be addressed before TIPS can be recommended as a potential recompensating tool.

关键词： Decompensated cirrhosis Liver recompensation Baveno VII Transjugular intrahepatic portosystemic shunt

Optimal Offering of Energy Storage in UK Day-Ahead Energy and Frequency Response Markets

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 Modern Power Systems and Clean Energy 2024年第2期12卷 415-426页

作者： Makedon Karasavvidis Andreas Stratis dimitrios Papadaskalopoulos Goran Strbac Department of Electrical and Electronic Engineering Imperial College LondonLondonUK Statkraft UK Ltd. LondonUK Department of Electrical and Computer Engineering University of PatrasPatrasGreece IEEE

The offering strategy of energy storage in energy and frequency response(FR) markets needs to account for country-specific market regulations around FR products as well as FR utilization factors, which are highly uncertain. To this end, a novel optimal offering model is proposed for stand-alone price-taking storage participants, which accounts for recent FR market design developments in the UK, namely the trade of FR products in time blocks, and the mutual exclusivity among the multiple FR products. The model consists of a day-ahead stage, devising optimal offers under uncertainty, and a real-time stage, representing the storage operation after uncertainty is materialized. Furthermore, a concrete methodological framework is developed for comparing different approaches around the anticipation of uncertain FR utilization factors(deterministic one based on expected values, deterministic one based on worst-case values, stochastic one, and robust one), by providing four alternative formulations for the real-time stage of the proposed offering model, and carrying out an out-of-sample validation of the four model instances. Finally, case studies employing real data from UK energy and FR markets compare these four instances against achieved profits, FR delivery violations, and computational scalability.

关键词： Energy markets energy storage frequency response optimal offering robust optimization stochastic programming

解决未来低惯量电力系统的频率控制难题——英国视角

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

Engineering 2021年第8期 50-64页

作者：洪启腾 Md Asif Uddin Khan Callum Henderson Agustí Egea-àlvarez dimitrios tzelepis Campbell Booth Department of Electronic and Electrical Engineering University of Strathclyde

为实现全球艰巨的脱碳目标，电力系统需大规模整合可再生能源发电，这大大降低了系统惯量。除了系统惯量的降低，英国的输电系统还有一些特有的难题：其容量相对较小，同时又与其他输电系统分离，并且可再生资源在整个系统中的分布很大... 详细信息

为实现全球艰巨的脱碳目标，电力系统需大规模整合可再生能源发电，这大大降低了系统惯量。除了系统惯量的降低，英国的输电系统还有一些特有的难题：其容量相对较小，同时又与其他输电系统分离，并且可再生资源在整个系统中的分布很大程度上不均匀。本文聚焦英国的输电系统，就低惯量系统中频率控制的相关挑战以及可能的解决方案提出了见解和建议。本文重点讨论了在不同时间尺度上发挥作用的三种主要技术：同步调相机、惯量模拟和快速频率响应。文中借鉴了英国最近的研究和开发项目，评估了其相对优势和局限性及其在解决未来低惯量系统频率控制难题方面的作用。

关键词：快速频率控制惯量模拟同步补偿低惯量系统

Minimally invasive pelvic exenteration for primary or recurrent locally advanced rectal cancer:A glimpse into the future

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 Gastrointestinal Surgery 2024年第7期16卷 1960-1964页

作者： dimitrios Kehagias Charalampos Lampropoulos Ioannis Kehagias Department of General Surgery General University Hospital of PatrasPatras 26504Greece Intensive Care Unit Saint Andrew’s General HospitalPatras 26335Greece Division of Bariatric and Metabolic Surgery Department of SurgeryUniversity of PatrasPatras 26504Greece

Surgeons have grappled with the treatment of recurrent and T4b locally advanced rectal cancer(LARC)for many *** main objectives are to increase the overall survival and quality of life of the patients and to mitigate postoperative ***,pelvic exenteration(PE)with or without neoadjuvant treatment is a curative treatment when negative resection margins are *** traditional open approach has been favored by many ***,the technological advancements in minimally invasive surgery have radically changed the surgical *** studies have demonstrated promising results in postoperative complications and oncological outcomes after robotic or laparoscopic PE.A recent retrospective study entitled“Feasibility and safety of minimally invasive multivisceral resection for T4b rectal cancer:A 9-year review”was published in the World Journal of Gastrointestinal *** we read this article with great interest,we decided to delve into the latest data regarding the benefits and risks of minimally invasive PE for ***,the small number of suitable patients,limited surgeon experience,and steep learning curve are hindering the establishment of minimally invasive PE.

关键词： Locally advanced rectal cancer Pelvic exenteration Multivisceral resection Minimally invasive surgical procedures Robotic surgical procedures

Downstaging strategies for unresectable hepatocellular carcinoma

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 2024年第20期30卷 2731-2733页

作者： Georgia Sofia Karachaliou Nikolaos Dimitrokallis dimitrios P Moris Division of Gastroenterology Department of MedicineDuke University Medical CenterDurhamNC 27710United States First Department of Surgery&Organ Transplant Unit Evangelismos General HospitalAthens 10676Greece Department of Surgery Duke University Medical CenterDurhamNC 27710United States

A significant number of patients with hepatocellular carcinoma(HCC)are usually diagnosed in advanced stages,that leads to inability to achieve *** options are focusing on downstaging a locally advanced *** is wellsupported in the literature that patients with HCC who undergo successful conversion therapy followed by curative-intent surgery may achieve a significant survival benefit compared to those who receive chemotherapy alone or those who are successfully downstaged with conversion therapy but not treated with *** artery infusion chemotherapy can be a potential downstaging strategy,since recent studies have demonstrated excellent outcomes in patients with colorectal liver metastatic disease as well as primary liver malignancies.

关键词： Unresectable hepatocellular carcinoma Hepatic arterial infusion chemotherapy Downstaging Hepatocellular carcinoma

Time to say goodbye: from Barcelona to Milan and the modern management of hepatocellular carcinoma

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Hepatobiliary Surgery and Nutrition 2024年第3期13卷 548-550页

作者： Georgia Sofia Karachaliou Nikolaos Dimitrokallis dimitrios Moris Division of Gastroenterology Department of MedicineDuke University Medical CenterDurhamNCUSA st Department of Surgery&Organ Transplant Unit Evangelismos General HospitalAthensGreece Department of Surgery Duke University Medical CenterDurhamNCUSA

Hepatocellular carcinoma(HCC)is the most common primary liver malignancy and one of the most common causes of cancer-related death with the projection to increase during the next few decades(1).During the last 3 decades,several staging systems have been introduced for the stratification of the prognosis and management of HCC of all *** is no consensus regarding the universal implementation of one staging system since all the proposed classifications have limitations(2).The Barcelona Clinic Liver Cancer(BCLC)Staging System remains the most widely classification system used for HCC management guidelines that incorporates tumor size,presence of metastatic disease,portal hypertension,Child-Turcotte-Pugh score,total bilirubin and performance ***,it does not account for tumoral behavior,and it is very“conservative”(restrictive)regarding resectability,especially for BCLC-B patients who might benefit from surgical management(3,4).Recent advances in systemic and locoregional therapies have led to changes in many guidelines regarding systemic therapy,as well as the possibility for downstaging patients to undergo surgery or transplant with curative intent.

关键词： Hepatocellular carcinoma(HCC) Barcelona Clinic Liver Cancer(BCLC) tumor burden score

Coating powder beds with liquids and foams based on viscous formulations using a twin screw mixer:A continuous process study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuology 2024年第10期93卷 364-376页

作者： Mohamed S.Manga dimitrios Kontziampasis Mustafa Al-Maqdad Sean Clifford Serafim Bakalis David W.York School of Chemical and Process Engineering Faculty of Engineering and Physical SciencesUniversity of LeedsLeedsLS29JTUK School of Mechanical Engineering Faculty of Engineering and Physical SciencesUniversity of LeedsLeedsLS29JTUK School of Science and Engineering University of DundeeDD14HNDundeeScotlandUK Dundee International Institute of Central South University Tongzipo RoadCentral South UniversityChangshaHunan410013China Department of Chemical Engineering School of EngineeringUniversity of NewcastleNewcastleNE17RUUK School of Chemical Engineering University of BirminghamBirminghamB152TTUK Department of Chemical Engineering Faculty of EngineeringUniversity of NottinghamNG72RDUK

Coating with viscous formulations has been essential in numerous industries as it can be a means for providing functionalization, additional properties, as well as other benefits. However, there have been scarce studies that have investigated and proposed methodologies in literature. Continuous coating of powders with viscous liquids poses as a promising technology, which has been mentioned in some studies, but has not yet been thoroughly investigated. This paper employs the use of image processing and analysis, in combination with statistical analysis of particles to evaluate the effectiveness of foams and liquids as a means of coating powder beds. Two different sizes of twin screw mixers that are working in continuous operation are employed, and a new continuous foaming device is fabricated and used for the experiments of coating. The effect of materials and process parameters (as for example rotational speed, and flowrate) on the quality of coating are investigated. Image analysis is used to assess the coating quality. The results clearly showcase the potential of using twin screw mixers for coating purposes and not only for mixing. The hypothesis that using large bubble foams to improve the coating of viscous liquids on particles is proven correct, as they provide higher quality coatings compared to their equivalent liquids, when used in the twin screw mixer. Surprisingly, using a larger scale twin screw mixer, does not show a substantial effect on the mixing, regarding quality, however there is still a requirement for mix optimization for achieving scale-up of this process. These results provide a new pathway for coating powders with viscous formulations in industrial applications, requiring less energy and effort in this process, and can pave the way towards introducing more sustainable industrial methodologies for coating.

关键词： Powder coating Continuous processing Viscous liquid Foam Image analysis Positron emission particle traking(PEPT)

Latest updates on structure and recommendations of cardiac rehabilitation programs in chronic heart failure

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 Clinical Cases 2024年第8期12卷 1382-1387页

作者： Christos Kourek Alexandros Briasoulis dimitrios E Magouliotis John Skoularigis Andrew Xanthopoulos Medical School of Athens National and Kapodistrian University of AthensAthens 15772Greece Department of Clinical Therapeutics Alexandra HospitalFaculty of MedicineNational and Kapodistrian University of AthensAthens 11528Greece Department of Surgery University Hospital of LarissaLarissa 41110Greece of Cardiology University Hospital of LarissaLarissa 41110Greece

Chronic heart failure(HF)is a clinical syndrome with high morbidity and mor-tality *** rehabilitation(CR)is a medically supervised program designed to maintain or improve cardiovascular health of people living with HF,recommended by both American and European guidelines.A CR program con-sists of a multispecialty group including physicians,nurses,physiotherapists,trainers,nutritionists,and psychologists with the common purpose of improving functional capacity and quality of life of chronic HF *** activity,lifestyle,and psychological support are core components of a successful CR *** has been shown to be beneficial in all ejection fraction categories in HF and most patients,who are stable under medication,are capable of *** individualized exercise prescription should be developed on the basis of a baseline evaluation in all *** main modalities of exercise training are aerobic exercise and muscle strength training of different intensity and *** is important to set the appropriate clinical outcomes from the beginning,in order to assess the effectiveness of a CR *** are still significant limitations that prevent patients from participating in these programs and need to be solved.A significant limitation is the generally low quality of research in CR and the presence of negative trials,such as the rehabilitation after myocardial infarction trial,where comprehensive rehabilitation following myocardial infraction had no important effect on mortality,morbidity,risk factors,or health-related quality of life or *** the present editorial,we present all the updated knowledge and recommendations in CR programs.

关键词： Cardiac rehabilitation Heart failure Outcomes Exercise protocols Prescription Future perspectives Limitations

Height-diameter models for King Boris fir(Abies borisii regis Mattf.) and Scots pine(Pinus sylvestris L.) in Olympus and Pieria Mountains, Greece

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 Mountain Science 2024年第5期21卷 1475-1490页

作者： dimitrios I.RAPTIS Dimitra PAPADOPOULOU Angeliki PSARRA Athanasios A.FALLIAS Aristides G.TSITSANIS Vassiliki KAZANA Renewable Natural Resource Management and Bioeconomy Laboratory Department of Forest and Natural Environment SciencesInternational Hellenic University66100 DramaGreece

In forest science and practice, the total tree height is one of the basic morphometric attributes at the tree level and it has been closely linked with important stand attributes. In the current research, sixteen nonlinear functions for height prediction were tested in terms of their fitting ability against samples of Abies borisii regis and Pinus sylvestris trees from mountainous forests in central Greece. The fitting procedure was based on generalized nonlinear weighted regression. At the final stage, a five-quantile nonlinear height-diameter model was developed for both species through a quantile regression approach, to estimate the entire conditional distribution of tree height, enabling the evaluation of the diameter impact at various quantiles and providing a comprehensive understanding of the proposed relationship across the distribution. The results clearly showed that employing the diameter as the sole independent variable, the 3-parameter Hossfeld function and the 2-parameter N?slund function managed to explain approximately 84.0% and 81.7% of the total height variance in the case of King Boris fir and Scots pine species, respectively. Furthermore, the models exhibited low levels of error in both cases(2.310m for the fir and 3.004m for the pine), yielding unbiased predictions for both fir(-0.002m) and pine(-0.004m). Notably, all the required assumptions for homogeneity and normality of the associated residuals were achieved through the weighting procedure, while the quantile regression approach provided additional insights into the height-diameter allometry of the specific species. The proposed models can turn into valuable tools for operational forest management planning, particularly for wood production and conservation of mountainous forest ecosystems.

关键词： Generalized nonlinear weighted regression Monte Carlo cross-validation Mountainous ecosystems Quantile regression Central Greece