检索结果-南通市图书馆

Hardware Architecture of Polyphase Filter Banks Performing Embedded Resampling for Software-Defined Radio Front-Ends

引用

ZTE Communications 2012年第1期10卷 54-62,70页

作者： Mehmood Awan yannick Le Moullec Peter Koch Fred Harris Technology Platforms Section Dept. of Electronic Systems Aalborg University Dept. of Electrical & Computer Engineering San Diego State University

In this paper, we describe resourceefficient hardware architectures for softwaredefined radio （SDR） frontends. These architectures are made efficient by using a polyphase channelizer that performs arbitrary sample rate changes, frequency selection, and bandwidth control. We discuss area, time, and power optimization for field programmable gate array （FPGA） based architectures in an Mpath polyphase filter bank with modified Npath polyphase filter. Such systems allow resampling by arbitrary ratios while simultaneously performing baseband aliasing from center frequencies at Nyquist zones that are not multiples of the output sample rate. A nonmaximally decimated polyphase filter bank, where the number of data loads is not equal to the number of M subfilters, processes M subfilters in a time period that is either less than or greater than the Mdataload ＇ s time period. We present a loadprocess architecture （LPA） and a runtime architecture （RA）（based on serial polyphase structure） which have different scheduling. In LPA, Nsubfilters are loaded, and then M subfilters are processed at a clock rate that is a multiple of the input data rate. This is necessary to meet the output time constraint of the down-sampled data. In RA, Msubfilters processes are efficiently scheduled within Ndataload time while simultaneously loading N subfilters. This requires reduced clock rates compared with LPA, and potentially less power is consumed. A polyphase filter bank that uses different resampling factors for maximally decimated, underdecimated, overdecimated, and combined upand downsampled scenarios is used as a case study, and an analysis of area, time, and power for their FPGA architectures is given. For resourceoptimized SDR frontends, RA is superior for reducing operating clock rates and dynamic power consumption. RA is also superior for reducing area resources, except when indices are prestored in LUTs.

关键词： SDR FPGA Digital Frontends Polyphase Filter Bank Embedded Resampling

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

Influence of Thin Water Film on Skid Resistance

引用

Journal of Traffic and Transportation Engineering 2014年第1期2卷 36-44页

作者： Minh-Tan Do Veronique Cerezo yannick Beautru Malal Kane IFSTTAR (French Institute of Science and Technology for Transport Development and Networks) Bouguenais 44344 France

Most of past researches on the skid resistance/road wetness relationship deal with thick water depths （〉 1 mm）. Questions remain as to the variation of skid resistance with thin water films and the transition between the dry state and the so-called ＂damp＂ or ＂humid＂ state at which the skid resistance drop can be as high as 30%-40%. This paper deals with a theoretical and experimental assessment of the friction-water depth relationship. The main objective is to estimate local water depths trapped between the tire and the road asperities and to define a so-called ＂critical＂ water depth which can be used to detect risky situations for road users. Tests are performed in laboratory. It was found that the friction-water depth curves have an inverse-S shape and present an initial constant-friction part before decreasing to a minimum value. A ＂critical＂ water depth, defined as the water depth above which the friction coefficient collapses significantly, is determined from surface texture on critical water depth is discussed. observed friction-water depth curves. Influence of test speed and

关键词： Skid resistance, water depth, microtexture.

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

Polyphase Filter Banks for Embedded Sample Rate Changes in Digital Radio Front-Ends

引用

ZTE Communications 2011年第4期9卷 3-9页

作者： Mehmood Awan yannick Le Moullec Peter Koch Fred Harris Technology Platforms Section Dept. of Electronic Systems Aalborg University Denmark Dept. of Electrical & Computer Engineering San Diego State UniversityCA USA

This paper presents efficient processing engines for software-defined radio （SDR） front-ends. These engines, based on a polyphase channelizer, perform arbitrary sample-rate changes, frequency selection, and bandwidth control. This paper presents an M-path polyphase filter bank based on a modified N-path polyphase filter. Such a system allows resampling by arbitrary ratios while performing baseband aliasing from center frequencies at Nyquist zones that are not multiples of the output sample rate. This resampling technique is based on sliding cyclic data load interacting with cyclic-shifted coefficients. A non-maximally-decimated polyphase filterbank （where the number of data loads is not equal to the number of M subfilters） processes M subfilters in a time period that is less than or greater than the M data loads. A polyphase filter bank with five different resampling modes is used as a case study for embedded resamp/ing in SDR front-ends. These modes are （i） maximally decimated, （ii） Under-decimated, （iii） over-decimated, and combined up- and down-sampling with （iv） single stride length, and （v） multiple stride lengths. These modes can be used to obtain any required rational sampling rate change in an SDR front-end based on a polyphase channelizer. They can also be used for translation to and from arbitrary center frequencies that are unrelated to the output sample rates.

关键词： SDR digital front-ends polyphase filter bank embedded resampling

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

高含量紫胶桐酸的中试生产研究

引用

林产工业 2019年第6期46卷 56-59页

作者：关庆芳姚品修 yannick Benichou 安宁戴科精细化工有限公司昆明650301

对紫胶桐酸的制备进行了中试生产试验。结果表明:采用中试工艺生产紫胶桐酸的方法操作简单易行,生产周期短,不使用任何有机溶剂,原辅料价廉易得,生产成本低;所得紫胶桐酸色泽白、晶型好、含量高。

关键词：紫胶紫胶桐酸中试生产

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

Single Platform Integration Environment for Turbine Rotor Design and Analysis

引用

Journal of Energy and Power Engineering 2014年第9期8卷 1590-1598页

作者： Francois Lagloire yannick Ouellet Benoit Blondin Francois Gamier Hany Moustapha Ecole de technologie superieure Montreal H3C 3R9 Canada Pratt and Whitney Canada Montreal J4G 1A1 Canada

The present article covers briefly state of the art software interoperability technical solutions and the development of the first module of a new single platform D ＆ A （design ＆ analysis） tool for simulation and prediction of stress and burst behavior of turbine rotating disc a preliminary design stage. This platform singularity requires integration of multiple CAD （computer assisted design）＆ FEA （finite element analysis） tools processing in batch mode and driven from a SPIE （single platform integration environment）. This first module is also to demonstrate, for an axial turbine disc hub axi-symmetric component, feasibility and usefulness of such a platform at preliminary design stage. Expected benefits of the D ＆ A single platform are to improve output accuracy, reduce cycle time, improve process quality and improve resource productivity.

关键词： Aero-engines gas turbines preliminary design turbines optimisation.

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

A General Model for Hepatitis B Disease with Age-Dependent Susceptibility and Transmission Probabilities

引用

Applied Mathematics 2014年第4期5卷 707-722页

作者： Danga Duplex Elvis Houpa Tagne Eric Miamdjo Tchaptchie yannick Kouakep Department of Mathematics and Computer Science Ngaoundéré University Ngaoundere Cameroon

A SEI model for hepatitis B is constructed where the susceptibility and other crucial transmission probabilities depend on the chronological age and the basic reproduction rate R0 is derived. Under suitable (biological and mathematical) assumptions in a closed population, results of Houpa D. D. E. et al. [1] are extended from constant case of p and q to age-dependent case: the disease-free equilibrium is globally asymptotically stable (GAS) if R0 . On the other hand, R0 > 1 induces that endemic equilibrium is GAS and the system is uniformly persistent.

关键词： A General Model for Hepatitis B Disease with Age-Dependent Susceptibility and Transmission Probabilities

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

一种基于SGX的轻量Fabric链码可信执行环境构建方法

引用

信息网络安全 2022年第7期 73-83页

作者： KELEKET GOMA Christy Junior yannick 易文哲王鹃武汉大学国家网络安全学院武汉430072 武汉大学空天信息安全与可信计算教育部重点实验室武汉430072

Hyperledger Fabric是一个开源分布式账本平台,其不仅拥有公有链防篡改、分布式记账的特点,还具有身份识别、数据保密、低延迟、高吞吐率等优点。传统Fabric架构中的链码缺乏安全执行环境,其容器执行环境会带来隐私泄露风险,而现有的智... 详细信息

Hyperledger Fabric是一个开源分布式账本平台,其不仅拥有公有链防篡改、分布式记账的特点,还具有身份识别、数据保密、低延迟、高吞吐率等优点。传统Fabric架构中的链码缺乏安全执行环境,其容器执行环境会带来隐私泄露风险,而现有的智能合约隐私保护方案无法适用于Go语言链码架构,且性能开销较大。因此,文章提出一种基于SGX的轻量Fabric链码可信执行环境构建方法及E-Fabric架构,搭建支持原生Go语言的可信镜像和容器,为链码创建可信执行环境,并通过远程认证协议验证链码是否可信。理论评估和数据测试结果表明,SGX Enclave的构建会适当增加开销,与原Fabric架构相比,E-Fabric的延迟升高了8%左右,吞吐率下降了4%左右,但整体性能达到原网络的94%,并且具有较小的可信计算基和更好的安全性。

关键词：区块链 Hyperledger Fabric 链码可信执行环境 Intel SGX

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

The Epidemio-Clinic Profile of Clandestine Abortion at Saint Joseph Hospital (Kinshasa)

引用

Open Journal of Obstetrics and Gynecology 2018年第12期8卷 1176-1184页

作者： Leon Mubikayi Aristide Yamba yannick Mubikayi Elisee Kuedimutshima Dolores Nembunzu School of Medicine Kasayi University Kananga Democratic Republic of the Congo Nurse School of Kananga Kananga Democratic Republic of the Congo Saint Joseph Hospital Kinshasa Democratic Republic of the Congo

Objective: To identify the epidemiologic profile of the woman having practiced the clandestine abortion, to determine the frequency and the complications of the clandestine abortion and to evaluate the prognosis of the clandestine abortion in our area. Method: The present study is descriptive and retrospective covering the period from January 2017 to December 2017, the one year period. On 118 patients received in the service for clandestine abortion, 60 were retained for the study. The 58 other files were excluded because of not containing sufficient information for this study. The descriptive statistical analyses were applied for the data analysis. Results: The frequency of the allowed patients for complication of clandestine abortion caused at the Saint Joseph hospital of Kinshasa was 6.03%. The most concerned population with this practice was less than 15 years and more than 45 years;they were unmarried (41.6%) and nulliparous (41.6%) in most cases. Ancillary medical staff (especially nurses) was accused the most in this practice of the illegal abortion caused by the dilatation and curettage with 50%. The genital haemorrhage constitutes the principal complication and reason for consultation and accounted for 78.3%. The assumption of responsibility is primarily medical and surgical. The vital prognosis is satisfactory for the immediate one, because no death is noted. Conclusion: The clandestine abortion remains public health problem in our communities. The results found in our study call for certain reflections so that to reduce its frequency and to avoid its complications.

关键词： Abortions Clandestine Complications

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

Molecular recognition by gold, silver and copper nanoparticles

引用

World Journal of Biological Chemistry 2013年第3期4卷 35-63页

作者： yannick Tauran Arnaud Brioude Anthony W Coleman Moez Rhimi Beonjoom Kim CNRS LMI University of Lyon 1F69622 Villeurbanne France Institute of Industrial Science University of TokyoTokyo 153-0041Japan IFE-Micalis INRA-AgroPariTech Jouy-en-JosasF78352 domaine de Vilvert France

The intrinsic physical properties of the noble metal nanoparticles,which are highly sensitive to the nature of their local molecular environment,make such systems ideal for the detection of molecular recognition *** current review describes the state of the art concerning molecular recognition of Noble metal *** the first part the preparation of such nanoparticles is discussed along with methods of capping and stabilization.A brief discussion of the three common methods of functionalization:Electrostatic adsorption;Chemisorption;Affinity-based coordination is *** the second section a discussion of the optical and electrical properties of nanoparticles is given to aid the reader in understanding the use of such properties in molecular *** the main section the various types of capping agents for molecular recognition;nucleic acid coatings,protein coatings and molecules from the family of supramolecular chemistry are described along with their numerous *** for the nucleic acids is on complementary oligonucleotide and aptamer *** the proteins the recognition properties of antibodies form the core of the *** respect to the supramolecular systems the cyclodextrins,calix[n]arenes,dendrimers,crown ethers and the cucurbitales are treated in *** a short section deals with the possible toxicity of the nanoparticles,a concern in public health.

关键词： Hybrid nanoparticles Gold Silver Copper Metal Molecular recognition DNA Protein Supramolecular assembly Toxicity

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

Prevalence of ENT Diseases in the Mental Deficient Patients

引用

International Journal of Otolaryngology and Head & Neck Surgery 2021年第3期10卷 229-237页

作者： Ndadi Tchiengang Kadielle Junie Adama Koundoul Kizonde Kalungwe yannick Diom Siga Evelyne ENT and CCF Department Peace Hospital Ziguinchor Senegal Emile Badiane Psychiatric Center Ziguinchor Senegal ENT and CCF Department Dakar-Senegal “Principal” Hospital Dakar Senegal

Introduction: Patients with mental deficiency have increased health needs. They develop certain ailments more than the rest of the general population. ENT pathology includes all the ailments concerning the nose, throat and ear and is a frequent reason for consultation in our health facilities. The aim of this study was to report the prevalence of ENT diseases in mental deficient. Material and Methods: This was a prospective, longitudinal study on a population of patients received in ENT consultation, during the days of October 15, 2019 and February 18, 2020 on the occasion of health campaigns organized by the Senegal Special Olympics Association. All admitted patients were mental deficient. Results: Out of a total of 334 patients received in general consultation (all specialties combined), 61 patients underwent an ENT consultation, i.e. a prevalence of 18.26%. There were more men (N = 39) than women (N = 32). The average age of the patients was 20 years. A past history of chronic otitis media was reported in 9.83% of patients (N = 6). Functional signs were dominated by hypoacusis (N = 16). Seventy point forty-nine patients (N = 43) had otologic conditions. Thirty-four patients had trisomy 21 (64.15%). Conclusion: The prevalence of ENT diseases among the mental deficient is considerable. This study is the first of its type in Senegal which superimposes the ENT on mental deficiency.

关键词： ENT Mental Deficiency Ziguinchor

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

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：