检索结果-南通市图书馆

Reconfigurable Intelligent Surface Assisted D2D Underlay Communications:A Two-Timescale Optimization Design

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 Communications and Information Networks 2020年第4期5卷 369-380页

作者： Chang Cai Huiyuan Yang Xiaojun Yuan Ying-Jun angela Zhang Yi Liu Center for Intelligent Networking and Communications(CINC) University of Electronic Science and Technology of China(UESTC)Chengdu 611731China Department of Information Engineering The Chinese University of Hong KongHong Kong 999077China

The performance of a device-to-device(D2D)underlay communication system is limited by the co-channel interference between cellular users(CUs)and D2D *** address this challenge,a reconfigurable intelligent surface(RIS)aided D2D underlay system is studied in this paper.A two-timescale optimization scheme is proposed to reduce the required channel training and feedback overhead,where transmit beamforming at the base station(BS)and power control at the D2D transmitters are adapted to instantaneous effective channel state information(CSI);and the RIS phase shifts are adapted to slow-varying channel *** on the two-timescale optimization scheme,we aim to maximize the D2D ergodic weighted sum-rate(WSR)subject to a given outage probability constrained signal-to-interference-plus-noise ratio(SINR)target for each *** two-timescale problem is decoupled into two sub-problems,and the two sub-problems are solved *** results verified that the two-timescale based optimization performs better than two baselines,and also demonstrated a favourable trade-off between system performance and CSI overhead.

关键词： reconfigurable intelligent surface(RIS) device-to-device(D2D)underlay communication twotimescale optimization

DATA IN THE APPLICATION OF NUCLEAR TECHNIQUES

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 1990年第Z1期1卷 10-13页

作者： angela Li Scholz State University of New York at Albany New York 12222U.S.A.

Beginning from the proposition that availability of reliable data is necessary to the application of nuclear techniques, we explore the questions of how such data are obtained and how the extent of their reliability is ascertained. These questions are considered first in general terms in relation to data types and organizational frameworks, then with particular reference to the journal Atomic Data and Nuclear Data Tables. The reliability issue is further discussed in terms of this journal’s policies and unique presentation style.

关键词： Nuclear technique Atomic data Nuclear data

The Outcome Analysis of Epidural Analgesia on Labor in Primigravida Women:a Systematic Review and Meta-analysis Focusing on Duration of Labor

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

The Outcome Analysis of Epidural Analgesia on Labor in Primi...

作者： angela Peter Aweda 重庆医科大学

学位级别：硕士

BACKGROUND: Epidural anesthesia is extensively used worldwide for pain relief in labor and more lately as an alternative and preferred form of anesthesia for caesarean sections;although its use is gaining universality,its outcome on the duration of labor is still *** meta-analysis aimed at analyzing the effects of epidural analgesia on duration of labor in primigravid women focusing on duration of ***: We conducted a systematical literature search in Pub Med and Embase(from the inception to July 2016).We calculated weighted mean differences(WMD)between the groups for continuous data,and corresponding 95% confidence intervals(CIs)using the random-effects *** also performed a subgroup analysis for the effects of different types of studies on duration of *** heterogeneity amongst the included studies was tested by I2 ***: Twelve studies,recruiting 16200 mothers overall,were selected for this systematic review and *** duration of first stage of labor was significantly prolonged in the no epidural group by a mean of 2.66(0.89,4.43,P=0.003)and significantly shortened the second stage of labor by a mean of-12.79(-21.13,-4.45,P=0.003).Moreover,the overall subgroup analyses shown significantly prolongation of the first stage of labor by the same mean of 2.66(0.89,4.43,P=0.003).CONCLUSION: The use of epidural analgesia for pain relief during labor is not associated with prolongation of first and second stages of labor in the groups of patients who requested epidural analgesia for pain relief during normal vaginal delivery.

关键词： Epidural analgesia Labor Primigravid Ropivacaine

Comparison of PM_(10) concentrations and metal content in three different sites of the Venice Lagoon: An analysis of possible aerosol sources

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2012年第11期24卷 1954-1965页

作者： Daniele Contini Franco Belosi Andrea Gambaro Daniela Cesari angela Maria Stortini Maria Chiara Bove Institute of Atmospheric Sciences and Climate ISAC-CNRLecceItaly Institute of Atmospheric Sciences and Climate ISAC-CNRBolognaItaly Department of Environmental Sciences Informatics and StatisticsUniversity Ca'Foscari of VeniceVeneziaItaly Institute of Atmospheric Sciences and Climate ISAC-CNRLecceItaly. Institute for the Dynamics of Environmental Processes IDPA-CNRVeneziaItaly

The Venice Lagoon is exposed to atmospheric pollutants from industrial activities, thermoelectric power plants, petrochemical plants, incinerator, domestic heating, ship traffic, glass factories and vehicular emissions on the mainland. In 2005, construction began on the mobile dams （MOSE）, one dam for each channel connecting the lagoon to the Adriatic Sea as a barrier against high tide. These construction works could represent an additional source of pollutants. PM10 samples were taken on random days between 2007 and 2010 at three different sites： Punta Sabbioni, Chioggia and Malamocco, located near the respective dam construction worksites. Chemical analyses of V, Cr, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sb, T1 and Pb in PM10 samples were performed by Inductively coupled plasma- quadrupole mass spectrometry （ICP-QMS） and results were used to identify the main aerosol sources. The correlation of measured data with meteorology, and source apportionment, failed to highlight a contribution specifically associated to the emissions of the MOSE construction works. The comparison of the measurements at the three sites showed a substantial homogeneity of metal concentrations in the area. Source apportionment with principal component analysis （PCA） and positive matrix factorization （PMF） showed that a four principal factors model could describe the sources of metals in PM10. Three of them were assigned to specific sources in the area and one was characterised as a source of mixed origin （anthropogenic and crustal）. A specific anthropogenic source of PM10 rich in Ni and Cr, active at the Chioggia site, was also identified.

关键词： MOdulo Sperimentale Elettromeccanico metals Venice Lagoon PM10 principal component analysis positive matrixfactorization

Management of mucinous cystic neoplasms of the pancreas

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 2010年第45期16卷 5682-5692页

作者： Mario Testini angela Gurrado Germana Lissidini Pietro Venezia Luigi Greco Giuseppe Piccinni Unit of Endocrine Digestive and Emergency SurgeryDepartment of Biomedical Sciences and Human OncologySection of General and Oncologic SurgeryUniversity Medical School of Bari70124 BariItaly Department of Emergency and Organ Transplantation University Medical School of Bari70124 BariItaly

The purpose of this study was to investigate the actual management of mucinous cystic neoplasm (MCN) of the pancreas. A systematic review was performed in December 2009 by consulting PubMed MEDLINE for publications and matching the "pancreatic mucinous cystic neoplasm", "pancreatic mucinous cystic tumour", "pancreatic mucinous cystic mass", "pancreatic cyst", and "pancreatic cystic neoplasm" to identify English language articles describing the diagnosis and treatment of the mucinous cystic neoplasm of the pancreas. In total, 16 322 references ranging from January 1969 to December 2009 were analysed and 77 articles were identified. No articles published before 1996 were selected because MCNs were not previously considered to be a completely autonomous disease. Definition, epidemiology, anatomopathological findings, clinical presentation, preoperative evaluation, treatment and prognosis were reviewed. MCNs are pancreatic mucinproducing cysts with a distinctive ovarian-type stroma localized in the body-tail of the gland and occurring in middle-aged females. The majority of MCNs are slow growing and asymptomatic. The prevalence of invasive carcinoma varies between 6% and 55%. Preoperative diagnosis depends on a combination of clinical features, tumor markers, computed tomography (CT), magnetic resonance imaging, endoscopic ultrasound with cyst fluid analysis, and positron emission tomography-CT. Surgery is indicated for all MCNs.

关键词： Pancreatic cystic lesion Pancreatic mucinous cystic neoplasm Pancreatic mucin-producing cysts Pancreatic cystic neoplasm Pancreatic ovarian-type stroma

Atypical cutaneous lesions in advanced-stage Hodgkin lymphoma: A case report

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 2019年第17期7卷 2513-2518页

作者： Fulvio Massaro angela Ferrari Enrico Zendri Magda Zanelli Francesco Merli Hematology Azienda Unità Sanitaria Locale IRCCS di Reggio Emilia

BACKGROUND Cutaneous involvement in Hodgkin lymphoma (HL) is a rare *** cases have been reported in literature,most describing paraneoplastic *** very few papers have described primary HL skin infiltration,reporting a wide range of clinical presentations that frequently include ulcers;plaques,nodules and papules have also been *** SUMMARY We report the case of a 56-year-old man who presented fever,multiple adenomegalies of neck and axilla and thick serpiginous skin lesions involving bilateral pectoral *** an initial diagnostic workup for a suspected active infectious disease,a lymph node biopsy was performed,which showed a neoplastic invasion from a mixed cellularity classical *** same histological pattern was described in a cutaneous biopsy of the chest *** other staging procedures performed revealed an advanced disease,with unfavourable clinical prognostic *** patient was prescribed 6 cycles of ABVD chemotherapy scheme (doxorubicin,bleomycin,vinblastine,dacarbazine),a regiment that requires demonstration of metabolic response achievement at the interim PET/CT scan to confirm continuation or to change therapeutic *** Skin involvement in HL is a rare finding and may represent a challenging clinical presentation due to extremely various types of lesions observed.

关键词： Hodgkin lymphoma Skin lesions Advanced stage ABVD Case report

Full Text Ejournal Packages East and West:CJN and JSTOR

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

现代图书情报技术 2002年第S1期 124-128页

作者： Anthony W.Ferguson angela Ko The University of Hong Kong Libraries Hong KongChinaThe University of Hong Kong LibrariesHong KongChina

In libraries,full text ejournal packages are among themost unique aspects of the digital *** challengemany of the basic concepts that librarians have held close totheir hearts:The journals themselves come in packages-thatis,unlike their print counter parts,they are bought as apackage and not one at a *** librarians who havelooked with pride at their journal collections because theywere selected one-by-one,on the basis of local needs,

关键词： Full Text Ejournal Packages East and West CJN

Reply to Grange PC,Morris PT,Benz HL,Buggele WA,Fryrear *** to the editor re:Amparore D,Pecoraro A,Piramide F,Verri P,Checcucci E,De Cillis S,et ***-dimensional imaging reconstruction of the kidney’s anatomy for a tailored minimally invasive partial nephrectomy:A pilot *** J Urol 2022;9:263-71.A further step towards personalized surgery through virtual clip application

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

Asian Journal of Urology 2023年第1期10卷 115-116页

作者： angela Pecoraro Daniele Amparore Department of Urology San Luigi Gonzaga HospitalUniversity of TurinOrbassanoTurinItaly

Dear Editor,We read with great interest the Letter relative to our recently published article on the role of three-dimensional(3D)imaging reconstruction of the kidney’s anatomy for the management of minimally invasive partial nephrectomy[1].We thank the Authors for the discussion points that they have raised,giving us the possibility to explain more in details the methodological draw of the study as well as to introduce some new steps in the evolution of 3D virtual models(3DVMs).

关键词： anatomy editor details

Potential utility of liquid biopsies in the management of patients with biliary tract cancers:A review

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 Gastrointestinal Oncology 2021年第9期13卷 1073-1085页

作者： Rohan Shotton angela Lamarca Juan Valle Mairéad G McNamara Department of Medical Oncology The Christie NHS Foundation TrustManchester M204BXUnited Kingdom Division of Cancer Sciences School of Medical SciencesFaculty of BiologyMedicine and HealthUniversity of ManchesterManchester M139PLUnited Kingdom

Biliary tract cancer,comprising gallbladder cancer,cholangiocarcinoma and ampullary cancer,represents a more uncommon entity outside high-endemic areas,though global incidence is *** majority of patients present at a late stage,and 5-year survival remains *** stage disease is incurable,and though palliative chemotherapy has been shown to improve survival,further diagnostic and therapeutic options are required in order to improve patient *** certain subtypes of biliary tract cancer are relatively rich in targetable mutations,attaining tumour tissue for histological diagnosis and treatment monitoring is challenging due to locoregional anatomical constraints and patient *** biopsies offer a safe and convenient alternative to invasive procedures and have great potential as diagnostic,predictive and prognostic *** this review,the current standard of care for patients with biliary tract cancer,future treatment horizons and the possible utility of liquid biopsies within a variety of contexts will be *** tumour DNA,circulating microRNA and circulating tumour cells are discussed with an overview of their potential applications in management of biliary tract cancer.A summary is also provided of currently recruiting clinical trials incorporating liquid biopsies within biliary tract cancer research.

关键词： Biliary tract cancer Liquid biopsy Circulating tumour DNA Cell free DNA Circulating tumour cells Biomarkers