检索结果-南通市图书馆

Evolution of the 3.65-2.58 Ga Mairi Gneiss Complex,Brazil:Implications for growth of the continental crust in the São francisco Craton

引用

Geoscience Frontiers 2022年第5期13卷 110-128页

作者： Igor de Camargo Moreira Elson Paiva Oliveira Daniel francisco Martins de Sousa Institute of Geosciences University of Campinas(UNICAMP)CampinasSPBrazil

The composition and formation of the Earth’s primitive continental crust and mantle differentiation are key issues to understand and reconstruct the geodynamic terrestrial evolution,especially during the ***,the scarcity of exposure to these rocks,the complexity of lithological relationships,and the high degree of superimposed deformation,especially with long-lived magmatism,make it difficult to study ancient *** this complexity,exposures of the Archean Mairi Gneiss Complex basement unit in the São francisco Craton offer important information about the evolution of South America’s primitive ***,here we present field relationships,LA-ICP-SFMS zircon U-Pb ages,and LA-ICP-MCMS Lu-Hf isotope data for the recently identified Eoarchean to Neoarchean gneisses of the Mairi *** Complex is composed of massive and banded gneisses with mafic members ranging from dioritic to tonalitic,and felsic members ranging from TTG(Tonalite-Trondhjemite-Granodiorite)to granitic *** new data point to several magmatic episodes in the formation of the Mairi Gneiss Complex:Eoarchean(ca.3.65–3.60 Ga),early Paleoarchean(ca.3.55–3.52 Ga),middle-late Paleoarchean(ca.3.49–3.33 Ga)and Neoarchean(ca.2.74–2.58 Ga),with no records of Mesoarchean ***-Hf data unveiled a progressive evolution of mantle differentiation and crustal recycling over *** the Eoarchean,rocks are probably formed by the interaction between the pre-existing crust and juvenile contribution from chondritic to weakly depleted mantle sources,whereas mantle depletion played a role in the Paleoarchean,followed by greater differentiation of the crust with thickening and recycling in the middle–late Paleoarchean.A different stage of crustal growth and recycling dominated the Neoarchean,probably owing to the thickening of the continental crust by collision,continental arc growth,and mantle differentiation.

关键词： São francisco Craton Mairi Gneiss Complex Primitive continental crust Zircon U-Pb dating Lu-Hf isotope geochemistry

来源：

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

SARS-CoV-2 and hearing:An audiometric analysis of COVID-19 hospitalized patients

引用

Journal of Otology 2021年第3期16卷 158-164页

作者： francisco alves de Sousa Rodrigo Pinto Costa Sandra Xará Ana Nóbrega Pinto Cecília Almeida e Sousa Centro Hospitalar Universitario do Porto Serviço de Otorrinolaringologia e Cirurgia da Cabeça e Pescoço(Otorhinolaryngology and Head&Neck surgery Department)Largo Prof.Abel Salazar4099-001PortoPortugal Unidade de Saúde Familiar Garcia de Orta ACeS Porto OcidentalMedicina Geral e Familiar(Family Medicine)R.Pinho Leal 294150-620PortoPortugal Centro Hospitalar Universitario do Porto Serviço de Doenças Infeciosas(Infectious Diseases Department)Largo Prof.Abel Salazar4099-001PortoPortugal

Purpose COVID-19 associated hearing loss is still an ongoing matter of *** original studies exist on audiological effects of SARS-CoV-2 infection in hospitalized *** main objective was to determine whether SARS-CoV-2 may affect auditory function in clinically ill COVID-19 *** and methods COVID-19 patients with moderate-severe disease and without prior history of hearing abnormalities were enrolled from a tertiary referral center,and matched with *** performed an audiometric evaluation,and thresholds were *** 120 ears from 60 patients were *** with COVID-19 showed worse mean auditory thresholds starting from 1000 Hz through higher frequencies,when compared to controls(1000 Hz:18.52±5.49 dB HL in controls vs 25.36±6.79 dB HL in COVID-19,p<0.001;2000Hz:17.50±5.57 dB HL in controls vs 21.96±7.05 dB HL in COVID-19,p=0.010;3000Hz:17.97±8.07 dB HL in controls vs 25±9.38 dB HL in COVID-19,p=0.003;4000 Hz:20.16±10.12 dB HL in controls vs 29.55±11.26 dB HL in COVID-19,p=0.001;8000 Hz:31.09±12.75 dB HL in controls vs 40.71±19.40 dB HL in COVID-19,p=0.030;Pure Tone Average:20.42±4.29 dB HL in controls vs 24.85±5.62 dB HL in COVID-19,p=0.001).Statistical significance persisted after adjusting for confounders such as age,gender and various comorbidities(p<0.05).Conclusions SARS-CoV-2 may affect hearing in COVID-19 patients with moderate-severe *** are in line with the previous suggested effects of COVID-19 on auditory *** study is expected to encourage further research on this topic.

关键词： SARS-CoV-2 COVID-19 Coronavirus Audiometry Hearing

来源：

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

Challenges and improvement strategies in the hospitalization of chronic multimorbid patients

引用

World Journal of Clinical Cases 2025年第3期13卷 35-41页

作者： Andres Fontalba-Navas francisco Pozo Muñoz Rogelio Garcia Cisneros Maria Jose Garcia Larrosa Maria del Mar Callejon Gil Ignacio Garcia Delgado Maria Belen Jimenez Martinez Antequera Hospital Northern Málaga Integrated Healthcare AreaAntequera 29200AndalusiaSpain Department of Public Health and Psychiatry University of MálagaMálaga 29010Spain Antequera Hospital Northern Málaga Antequera Integrated Healthcare AreaAntequera 29200MálagaSpain

BACKGROUND Addressing the growing challenge of hospitalizing chronic multimorbid patients,this study examines the strain these conditions impose on healthcare systems at a local level,focusing on a pilot *** diseases and complex patients require comprehensive management strategies to reduce healthcare burdens and improve patient *** proven effective,this pilot model has the potential to be replicated in other healthcare settings to enhance the management of chronic multimorbid *** To evaluate the effectiveness of the high complexity unit(HCU)in managing chronic multimorbid patients through a multidisciplinary care model and to compare it with standard hospital *** The study employed a descriptive longitudinal approach,analyzing data from the Basic Minimum Data Set(BMDS)to compare hospitalization variables among the HCU,the Internal Medicine Service,and other services at Antequera Hospital throughout *** HCU,designed for patients with complex chronic conditions,integrates a patient-centered model emphasizing multidisciplinary care and continuity *** The study employed a descriptive longitudinal approach,analyzing data from the BMDS to compare hospitalization variables among the HCU,the Internal Medicine Service,and other services at Antequera Hospital throughout *** HCU,designed for patients with complex chronic conditions,integrates a patient-centered model emphasizing multidisciplinary care and continuity *** This study demonstrates the effectiveness of the HCU in managing patients with complex chronic diseases through a multidisciplinary *** coordinated care provided by the HCU results in improved patient outcomes,reduced unnecessary hospitalizations,and better management of patient *** superiority of the HCU compared to standard care is evident in key outcomes such as fewer readmissions and higher patient satisfaction,reinforcing its value as a model of ca

关键词： High complexity unit Chronic multimorbidity Patient-centered care Integrated care Healthcare management

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Local Fourier Analysis for Edge-Based Discretizations on Triangular Grids

引用

Numerical Mathematics(Theory,Methods and Applications) 2015年第1期8卷 78-96页

作者： Carmen Rodrigo francisco Sanz francisco J.Gaspar francisco J.Lisbona Department of Applied Mathematics University of ZaragozaC/Maria de Luna 350018ZaragozaSpain BIFI University of Zaragoza C/Pedro Cerbuna 1250009ZaragozaSpain Department of Applied Mathematics University of ZaragozaC/Pedro Cerbuna 1250009ZaragozaSpain

In this paper,we present a local Fourier analysis framework for analyzing the different components within multigrid solvers for edge-based discretizations on triangular *** different stencils associated with edges of different orientation in a triangular mesh make this analysis *** resulting tool is demonstrated for the vector Laplace problem discretized by mimetic finite difference *** from the local Fourier analysis,as well as experimentally obtained results,are presented to validate the proposed analysis.

关键词： Multigrid local Fourier analysis edge-based discretizations mimetic finite differences

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Integrated risk management: a Petrobras application in offshore well construction safety to minimize critical emergency disconnections

引用

Petroleum Science 2018年第2期15卷 421-431页

作者： Claudio Benevenuto de Campos Lima Pedro Esteves Aranha Jose francisco Tebaldi de Castro Gilson Brito alves Lima Augusto Borella Hougaz Felipe de Souza Terra Petrobras Department of Production Engineering Federal Fluminense University

In order to avoid mistakes and to save a great deal of time in analysis, an innovative methodology was developed that can analyze the well operations and rig characteristics involved to define the best emergency disconnect sequence （EDS） available. A solution was developed based on the characteristics of the rigs and blowout preventers （BOPs）, and six variables were considered that directly affect the choice of EDS. All possible combinations of 64 scenarios were analyzed, and the priority of choice of the EDS was defined empirically. This paper presents an approach to EDS risk management and examples of exposure time （time without riser safety margin and shear capability） for the same well, which can be lowered from 13% to 0.1%. The impact of this reduction is related to the ability of the BOP to cut some of the heavy casings, in addition to improved availability of EDS modes. This implementation opened up many possibilities for the performance of risk exposure analysis, enabling comparison of several BOP configurations of contracted rigs and selection of the best options. This innovative approach allowed a better management of the rig schedules, prioritizing safety aspects and making it possible to allocate the fleet in a systematic way.

关键词： Well safety Safety barriers Emergency disconnect sequence (EDS) Well control Kick Well design

来源：

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

Controversies around the treatment of peritoneal metastases of colorectal cancer

引用

World Journal of Gastrointestinal Oncology 2025年第1期17卷 260-264页

作者： francisco J Morera-Ocon Clara Navarro-Campoy Ticiano Guastella francisco Landete-Molina Department of General Surgery Hospital General de RequenaRequena 46340Spain Department of Gynecology and Obstetrics Hospital 9 OctubreValencia 46015Spain Department of Pathology Hospital General de RequenaRequena 46340Spain

In this editorial we examine the article by Wu et al published in the World Journal of Gastrointestinal *** resection for peritoneal metastases from colorectal cancer(CRC)has been gradually accepted in the medical oncology community.A randomized trial(PRODIGE 7)on cytoreductive surgery(CRS)with hyperthermic intraperitoneal chemotherapy(HIPEC)failed to prove any benefit of oxaliplatin in the overall survival of patients with peritoneal metastases from colorectal ***,isolated systemic chemotherapy for CRC stage IV has demonstrated a reduced response in peritoneal metastases than that obtained in other metastatic sites such as the *** tool is required in those patients to achieve more local control of the *** groups in peritoneal surgery continue to use HIPEC in their procedures,using other agents than oxaliplatin for peritoneal cavity infusion,such as mitomycin *** patients present with complex surgical issues to manage,and consequently a large burden of complications has to be ***,identifying patients who will benefit from CRS with or without HIPEC would be of great interest.

关键词： Colorectal cancer Peritoneal metastasis Hyperthermic intraoperative chemotherapy Treatment strategies Peritoneal Surface Oncology GroupInternational

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Impact of Shaft Stiffness on Inertial Response of Fixed Speed Wind Turbines

引用

电力系统自动化 2012年第8期36卷 191-197页

作者： francisco GONZLEZ-LONGATT Faculty of Engineering and Computing Coventry UniversityCoventry CV1 5FBUnited Kingdom

Future power system faces several challenges,one of them is the high penetration level of intermittent wind power generation,providing small or even no inertial response and being not contributing to the frequency *** effect of shaft stiffness on inertial response of fixed speed wind turbines is *** different drive-train models based on the multi-body system are *** small-signal analysis demonstrates no significant differences between models in terms of electro-mechanical eigen-values for increasing shaft *** natural resonance frequency of drive-train torsion modes shows slightly different values between damped and undamped models,but no significant differences are found in the number-mass ***-domain simulations show the changes in the active power contribution of a wind farm based on a fixed speed wind turbine during the system frequency *** changes in the kinetic energy during the dynamic process are calculated and their contribution to the inertia constant is small and *** largest contribution of the kinetic energy is provided at the beginning of the system frequency disturbance to reduce the rate of the frequency change,it is positive for the frequency stability.

关键词：风力发电机刚度模型惯性风力涡轮机频率稳定性轴定速传动系统

来源：

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

Ferrofluid moving thin films for active flow control

引用

Chinese Journal of Aeronautics 2021年第5期34卷 115-119页

作者： francisco J.ARIAS Department of Fluid Mechanics Polytechnic University of CataloniaESEIAATC/Colom 1108222 BarcelonaSpain

Ferrofluid moving thin films and their possible significance with regard to active flow control for lift and attack angle enhancement are *** this strategy,a very thin film of ferrofluid is strongly attached at the wall of the wing by a normal magnetic field from below and pumped tangentially along the *** a simplified physical model and from the available experimental data on moving walls,the expected lift enhancement and effect on the attack angle were *** research and design is required in order to explore the possibilities in the use of ferrofluid moving thin films.

关键词： Active flow control Boundary layer separation Ferrofluid

来源：

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

Assessment of Genetic Stability Among In Vitro Plants of Arachis retusa Using RAPD and AFLP Markers for Germplasm Preservation

引用

Journal of Integrative Plant Biology 2007年第3期49卷 307-312页

作者： Rachel Fatima Gagliardi Luiz Ricardo Hanai Georgia Pacheco Carlos Alberto Oliveira Leonardo alves Carneiro José francisco Montenegro Valls Elisabeth Mansur Maria Lucia Carneiro Vieira Laboratório de Micropropagacao e Transformacao de Plantas Universidade do Estado do Rio de Janeiro postal code 20550-013 Maracana Rio de Janeiro Brazil Departamento de Genética - Escola Superior de Agricultura Luiz de Queiroz Universidade de Sao Paulo postal code 13418-900 Piracicaba Brazil Embrapa Recursos Genéticos e Biotecnologia postal code 70770-901 Brasilia Brazil

Arachis retusa Krapov. et W. C. Gregory et Valls is endemic in the West-central region of Brazil, occurring In areas endangered by human actions. The establishment of in vitro preservation methods for wild species of Arachis is an alternative to seed banks for germplasm storage, multiplication and distribution. The risk of genetic changes Induced by tissue culture and the monitoring of the genetic stability of the biological material before, during and after storage must be considered In the context of conservation. Random amplified polymorphlc ONA （RAPO） and amplified fragment length polymorphism （AFLP） fingerprinting were used to evaluate the genetic stability of in vitro plants originated from cotyledons and embryo axes of A. retusa. Cotyledons originated shoots through direct organogenesls and embryo axes displayed muItishoot formation Induced by 110 mmol/L and 8.8 mmol/L BAP, respectively. Ninety genomlc regions （loci） generated from RAPO and 372 from AFLP analyses were evaluated. All amplified fragments detected by both techniques in plants derived from the two explant types were monomorphic. The results Indicate that the recovered shoots are genetically stable at the assessed genomic regions.

关键词： amplified fragment length polymorphism Arachis retusa in vitro preservation micropropagation random amplifiedpolymorphic DNA somaclonal variation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

An approximate Kerr-Newman-like metric endowed with a magnetic dipole and mass quadrupole

引用

Communications in Theoretical Physics 2024年第8期76卷 124-138页

作者： francisco Frutos-Alfaro Space Research Center and School of Physics University of Costa RicaSan PedroSan JoseCosta Rica

Approximate all-terrain spacetimes for astrophysical applications are presented. The metrics possess five relativistic multipole moments, namely, mass, rotation, mass quadrupole, charge,and magnetic dipole moment. All these spacetimes approximately satisfy the Einstein-Maxwell field equations. The first metric is generated using the Hoenselaers-Perjés method from given relativistic multipoles. The second metric is a perturbation of the Kerr-Newman metric, which makes it a relevant approximation for astrophysical calculations. The last metric is an extension of the Hartle-Thorne metric that is important for obtaining internal models of compact objects perturbatively. The electromagnetic field is calculated using Cartan forms for locally non-rotating observers. These spacetimes are relevant for inferring properties of compact objects from astrophysical observations. Furthermore, the numerical implementations of these metrics are straightforward, making them versatile for simulating potential astrophysical applications.

关键词： Gravitation Einstein-Maxwell equations Compact objects

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：