检索结果-南通市图书馆

Brava和自体脂肪移植是一种安全有效的隆乳选择：一项6年，81例多中心前瞻性研究结果（摘要）

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国美容整形外科杂志 2012年第7期23卷 I0003-I0003页

作者： Roger K. Khouri Marita Eisenmann-Klein eufemiano. cardoso Brian C. Cooley Daniel. Kacher Eva Gombos Thomas J. Baker 朱利娜魏峰高景恒张晨迈阿密乳房中心美国佛罗里达州比斯坎湾《中国美容整形外科杂志》编辑部大连大学附属新华医院整形外科

背景与目的隆乳术中采用自体脂肪移植是经科学认证的有吸引力的选择。方法多中心前瞻性研究中，纳入81例女性，年龄17—63岁，均使用Brava设备4周。Brava是一个类似乳罩装置、负压体外组织扩张器。而后利用10～14个针刺位点以三维扇形... 详细信息

背景与目的隆乳术中采用自体脂肪移植是经科学认证的有吸引力的选择。方法多中心前瞻性研究中，纳入81例女性，年龄17—63岁，均使用Brava设备4周。Brava是一个类似乳罩装置、负压体外组织扩张器。而后利用10～14个针刺位点以三维扇形模式对每个乳房注射自体脂肪（平均每个乳房注射277ml）。受试者在注射后24h内重新使用Brava，并使用7d以上。利用磁共振成像技术扫描治疗前和治疗后的乳房体积，并与6篇已报道的自体脂肪隆乳术（未使用扩张器）报道的Meta分析结果相比较。随访期为1～6年（平均为3．7年）。结果3—6个月内乳房体积没有变化。接受治疗的女性中有71例按要求使用Brava，其结果是1年内每个乳房体积增加233ml，而之前报道的没有使用Brava的女性乳房体积只增加134ml（P〈0．00001）。使用Brava扩张的移植存活率为（82±18）％，而未使用Brava的移植存活率为（55±18）％（P〈0．00001）。且移植前的Brava扩张与乳房增大的体积有强烈的线性相关性（R2=0．87）。未发现可疑的乳房肿块或结节。1年后影像评估时，磁共振成像技术发现脂肪坏死的发生率为16％。结论自体脂肪移植术前使用Brava扩张器可使乳房体积明显增大，且脂肪植入点更多，移植成活率更高，移植物坏死和并发症最少，证明该方法具有很高的安全性和有效性。临床问题／证据等级：疗法，Ⅳ级。

关键词：多中心前瞻性研究自体脂肪移植隆乳术安全性磁共振成像技术组织扩张器乳房体积移植存活率

Comprehensive Survey and Critical Evaluation of the Performance of State-of-the-art LED Drivers for Lighting 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

Chinese Journal of Electrical Engineering 2021年第2期7卷 21-36页

作者： Fernando Bento Antonio J.Marques cardoso CISE-Electromechatronic Systems Research Centre University of Beira InteriorCovilhã6201-001Portugal

The adoption of light-emitting diodes(LEDs)for lighting applications is becoming increasingly relevant as this recent technology is *** the recent uptake of LED lighting technologies for distinctive end-uses,the research community has also committed to the development of an ever-increasing range of power electronic converters that are suitable for yielding maximum quality lighting,high efficiency,and long *** one of the most recent and promising technologies of the moment,it is vital to fully understand the performance and merits of each state-of-the-art LED lighting ***,this paper compiles essential information about a broad range of state-of-the-art LED lighting systems,aiming to compare their performances in terms of *** on the comparative analysis,the main merits and drawbacks of each LED lighting system architecture are ***,a detailed evaluation of the performance of a particular LED lighting system and the corresponding control strategy is developed,thereby enabling a clear view of the evolution of the performance of the system as a function of parameters like supply voltage and number of driver channels.

关键词： Efficiency analysis LED lighting AC-DC converters DC-DC converters

Determination of runoff coefficient(C)in catchments based on analysis of precipitation and flow events

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 Soil and Water Conservation Research 2022年第2期10卷 208-216页

作者： Ronalton Evandro Machado Tais Oliveira cardoso Matheus Henrique Mortene Unicamp(University of Campinas)-College of Technology LimeiraSPBrazil

Runoff coefficient(C)values are tabulated and enshrined in hydrological *** values are considered to be constant although they may not correspond to *** the same catchment,they may vary according to intensity,temporal and spatial distribution of precipitation events,humidity condi-tions,soil and land *** study aimed to analyze extreme events of precipitation and their corre-sponding flows to obtain experimental runoff coefficients(C)and compare them with the tabulated *** study was conducted in five experimental catchments in the state of S~ao Paulo,Brazil,with different land *** runoff coefficients(C)were obtained from the analysis of hydrograms and using a digital filter,which made it possible to separate the direct runoff from the total *** observed a different variation in runoff coefficient values between catchments compared to those obtained from the *** runoff coefficients had a high correlation with land *** catchments with original vege-tation cover,such as Cerrado and forest,they varied little among the events analyzed,unlike the catchments where land use is diversified,with predominantly agricultural and urban occupation.

关键词： Digital filter Hydrograms Hydrology Land use Watershed

Comparison of thermal performance between test cells with different coverage systems for experimental typical day of heat in Brazilian Southeastern

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Architectural Research 2014年第3期3卷 271-282页

作者： Grace Tiberio cardoso Francisco Vecchia Graduate Program in Environmental Engineering Sciences University of Sao Paulo Rua Borges Lagoa94 apto 73 Sao Paulo 04038-000 Brazil

This article shows experimentally the thermal performance of two test cells with different coverage systems, Ught Green Roof （LGR） and ceramic roof by analyzing internal surface temperatures （IST） in the ceiling and dry bulb temperatures （DBT）. The objective was to evaluate the spatial distnbution of temperatures in buildings according to spatial and temporal Dynamic CUmato[ogy approaches. An experimental, typical day for heat conditions was determined. The data of the main climatic vari- ables provided by an automatic weather station and temperatures inside the test cells were collected using thermocouples installed such that the entire space is included. The results led to the conclusion that the LGR has a balanced IST and DBT spatial distribution compared with ceramic roofs. Nevertheless, the analysis of the thermal performance is only one of the variables that must be considered when developing a construction proposal that is adapted to the context. The manner in which the thermocouples were placecl inside the test cells also showed the importance of specifying the location of the sensors in experimental studies on the behavior and thermal performance of buildings.

关键词： Light Green Roof(LGR) Thermal perfor-mance Dynamic Climatology Internal tempera-tures Spatial distribution Experimental typicalday

Effect of pier shape and pier alignment on the equilibrium scour depth at single piers

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

International Journal of Sediment Research 2016年第3期31卷 244-250页

作者： Cristina Fael Rui Lana António cardoso Faculdade de Engenharia Universidade da Beira InteriorEdificio Ⅱ das EngenhariasCalcada Fonte da Lameiro Instituto Superior de Engenharia/Universidade do Algarve Instituto Superior Tecnico Universidade de Lisboa

The equilibrium scour depth at uniform single bridge piers depends on a large number of variables,including the pier horizontal cross-section shape and its alignment angle towards the flow *** influence of these variables has been studied by only a few researchers,mostly,on the basis of tests that were far from approaching *** experimental study aims at revisiting the influence of piers’ shape and alignment on local scouring for length-width ratios smaller than or equal to 4,by increasing the experimental *** five long-duration laboratory tests were run under steady,clear-water flow,close to the threshold for initiation of sediment *** pier shapes were considered:circular,rectangular square-nosed,rectangular round-nosed,oblong,and zero-spacing(packed) pile-groups;the tested skew-angles were 0°,30°,45°,60°,and 90°.It was concluded that i) the shape factor can be taken as 1.0,for rectangular round-nosed and oblong cross-section piers,and as 1.2,for rectangular squarenosed and packed pile-group cross-section piers,ii) the shape factor does not vary significantly with the duration of tests,this way confirming the robustness of the shape factors reported to date,iii) the effect of shape is present at skewed piers although the associated coefficients remain in the narrow range of1.0-1.2,and iv) for length-width ratios smaller than 4,the shape factor is of the same order of magnitude as the skew angle factor and should not be neglected.

关键词： Scour Pier shape Pier alignment

A Comprehensive Survey on Fault Diagnosis and Fault Tolerance of DC-DC Converters

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

Chinese Journal of Electrical Engineering 2018年第3期4卷 1-12页

作者： Fernando Bento Antonio J.Marques cardoso CISE-Electromechatronic Systems Research Centre Universidade da Beira InteriorCalcada Fonte do LameiroP-6201-001 CovilhaPortugal Department of Electromechanical Engineering Universidade da Beira InteriorCalcada Fonte do LameiroP-6201-001 CovilhaPortugal

DC-DC converters are becoming more commonly used in power conversion solutions for energy management purposes,being employed in an ever-increasing range of DC-based applications,such as LED lighting,electric vehicles,energy storage solutions,and consumer electronics(laptops,smartphones,etc.).In this context,efficiency and reliability are *** research efforts made in improving reliability of DC-DC converters are still quite narrow and ***,DC-DC converters take the shape of an endless number of topologies,with different functionalities and operation principles,thus complicating the task of improving reliability of all forms of DC-DC ***,compiling the information about the main failure modes,corresponding fault diagnostic algorithms and fault tolerance strategies developed so far,in a single document,becomes increasingly ***,this paper presents an up-to-date review of the recent achievements attained regarding the improvement of availability and reliability of DC-DC converters.

关键词： DC-DC converters fault diagnosis fault tolerance reliability

Truncated States Obtained by Iteration

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2008年第2期25卷 517-520页

作者： W. B. cardoso N. G. de Almeida Instituto de Física Universidade Federal de Goiás 74.001-970 Goiania (GO) Brazil Núcleo de Pesquisas em Física Universidade Católica de Goiá s 74.605-220 Goiania (GO) Brazil

We introduce the concept of truncated states obtained via iterative processes （TSI） and study its statistical features, making an analogy with dynamical systems theory （DST）. As a specific example, we have studied TSI for the doubling and the logistic functions, which are standard functions in studying chaos. TSI for both the doubling and logistic functions exhibit certain similar patterns when their statistical features are compared from the point of view of DST.

关键词： QUANTUM CRYPTOGRAPHY DECOHERENCE GENERATION COLLAPSE REVIVAL OPTICS FIELD

Effect of Anti-Diffusion Oxide Layer on Enhanced Thermal Stability of Magnetic Tunnel Junctions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2006年第4期23卷 932-935页

作者：张宗芝赵慧 cardoso S. Freitas P.P. Department of Optical Science and Engineering State Key Laboratory for Advanced Photonic Materials and Devices Fudan University Shanghai 200433 INESC-MN R. Alves Redol 9 1000 and Physics Department IST Av. Rovisco Pals 1096 Lisbon Portugal

Magnetic tunnel junctions （MTJs） with one proper oxidized FeOx layer placed between the Al oxide barrier and the top CoFe pinned layer show large tunnelling-magnetoresistance （TMR） signals as high as 39% after anneal at 380℃. The increased TMR signal may originate from the as-deposited Fe/FeOx （non-magnetic） layers changing to Fe＋magnetic FeOy layer （some Fe3O4 and mostly other kind of magnetic Fe oxide） after high temperature anneal. The maximum TMR value （TMR ） and the corresponding temperature Ts where the TMRmax occurs upon annealing are closely associated with the oxidation time of the AlOx and FeOx layers, too long oxidation for the Fe layers is detrimental for the TMR value. In addition to the enhanced AlOx barrier quality upon anneal, the improved thermal stability is also attributed to the Mn diffusion retardation by the presence of the FeOx layer which acts as an antidiffusion layer. For MTJs without the interposed FeOx layer, the TMR signal reduction at 300℃ originates from the Mnlr/CoFe partially decoupling and CoFe/AlOx interface polarization loss due to the significant Mn diffusion.

关键词： ROOM-TEMPERATURE MAGNETORESISTANCE INTERFACE BARRIERS DIFFUSION

Teleportation of Entangled States through Divorce of Entangled Pair Mediated by a Weak Coherent Field in a High-Q Cavity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2008年第7期25卷 2488-2491页

作者： W. B. cardoso N. G. de Almeida Instituto de Ffsica Universidade Federal de Goiaes 74.001-970 Goiaenia (GO) Brazil Nucleo de Pesquisas em Fisica Universidade Catoelica de Goids 74.605-080 Goiania (GO) Brazil

We propose a scheme to partially teleport an unknown entangled atomic state. A high-Q cavity, supporting one mode of a weak coherent state, is needed to accomplish this process. By partial teleportation we mean that teleportation will occur by changing one of the partners of the entangled state to be teleported. The entangled state to be teleported is composed by one pair of particles, we called this surprising characteristic of maintaining the entanglement, even when one of the particle of the entangled pair being teleported is changed, of divorce of entangled states.

关键词： UNKNOWN ATOMIC STATE DETERMINISTIC QUANTUM TELEPORTATION PODOLSKY-ROSEN CHANNELS SCHEME SUPERPOSITION OPERATIONS LIGHT