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使用面部识别来实现员工签到的应用，该应用能适应随时间变化（年龄、脸型）

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使用面部识别来实现员工签到的应用，该应用能适应随时间变化（年...

作者： KOUADIO EHOUMAN jean yves 华北电力大学(北京)

学位级别：硕士

实施考勤登记是在日常业务中的一项重要工作。传统方法普遍使用人工输入,即员工在进入大楼时记录他们的姓名、到达和离开时间,这种方法过于耗时,并且容易受到欺诈行为的影响。为了解决这些问题,本文开发了一种基于面部识别的新型系统,... 详细信息

实施考勤登记是在日常业务中的一项重要工作。传统方法普遍使用人工输入,即员工在进入大楼时记录他们的姓名、到达和离开时间,这种方法过于耗时,并且容易受到欺诈行为的影响。为了解决这些问题,本文开发了一种基于面部识别的新型系统,以简化员工考勤流程。所提出的系统设计了专用应用程序。当员工到达工作场所时,可以便捷地访问应用程序并接受一系列验证步骤。首先,该应用程序会检查员工是否实际存在于公司的经营场所内。如果确认存在,应用程序将会激活设备的摄像头来捕捉员工的面部图像。该系统采用了先进的面部检测和识别技术,分析捕捉到的图像用以识别个人。一旦员工被成功识别,他们的考勤就会被记录下来,系统会将他们的状态更新为“出席”同时记载当前时间和日期。通过面部识别技术实现考勤流程自动化,该系统大大降低了传统手动数据输入方法中相关的错误和欺诈行为的可能性。这种设计的解决方案不仅提高了考勤效率,还提高了考勤机的整体准确性和可靠性。通过消除手动输入的需要,员工可以通过简单的面部扫描无缝记录他们的出勤情况,最大限度地减少管理负担和潜在的差异。该系统能够实时跟踪员工的出勤情况,为监控考勤模式、促进资源分配和加强整体运营管理提供了宝贵的数据。总之,基于面部识别的考勤系统的实现为传统方法所面临的问题提供了一个优异的解决方案。通过利用尖端技术,该系统提高识别准确性,节省了考勤时间,同时降低了欺诈风险,有助于在组织内实现更高效、更可靠的考勤管理流程。

关键词：深度学习 python 图像处理人脸检测人脸识别 CNN PHP

Algorithm and Design Methodology to Develop a PIFA with Optimized Reflection Coefficient for the ISM 868 MHz Band

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Open Journal of Antennas and Propagation 2016年第4期4卷 166-175页

作者： Bouchta Hajjine Christophe Escriba Daniel Medale jean-yves Fourniols LAAS-CNRS Université de Toulouse CNRS INSA Toulouse France

This paper presents a methodological approach to design a printed Inverted F antenna for the ISM 868 MHz band. For this design, the ground plane dimensions were kept fixed and the meandered radiating arm was modified to obtain the best compromise integration/performances. This approach was then generalized to design meandered printed inverted F antennas.

关键词： Design Algorithm Meandered Antenna PIFA ISM Integration Reflection Coefficient

卢旺达公路货运的客户服务质量评估例分析：Simera Transport Ltd.

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卢旺达公路货运的客户服务质量评估例分析：Simera Transport Ltd...

作者： Mbonyintore Rugwiro jean yves 北京交通大学

学位级别：硕士

公路货运现在被认为是促进卢旺达货物和包裹运输的最重要手段之一。此外,由于其他道路运输系统(尤其是铁路)的状况不佳,人们现在在很大程度上依赖于公路运输。这种运输方式所发挥的重要作用是由于其对卢旺达大多数公司的灵活性,可获得... 详细信息

公路货运现在被认为是促进卢旺达货物和包裹运输的最重要手段之一。此外,由于其他道路运输系统(尤其是铁路)的状况不佳,人们现在在很大程度上依赖于公路运输。这种运输方式所发挥的重要作用是由于其对卢旺达大多数公司的灵活性,可获得性和可负担性。目前卢旺达有大量的本地货运代理商,其中大部分是中小型货运代理商。然而,它们占据了非常小的市场份额并且正被外国公司抢占,其中一个主要原因是服务质量低。服务质量在赢得新客户以及保留忠诚客户方面发挥着至关重要的作用。由于其特殊性,很难对公司的服务质量进行全面评估。SERVQUAL模型被认为是最常用的评估工具之一,它基于五个因素:可靠性、信任、有形性、响应速度和移情作用。本文首先给出了公路货运和服务质量评估的主要概念,重点是客户服务和SERVQUAL模型。然后介绍了 Simera运输有限公司,公路货运的现状和客户服务质量的情况。本文使用定量方法,通过公司向使用Simera运输有限公司道路货运服务的企业客户分发调查问卷。五周后成功收集了 222份回复,以揭示客户对Simera运输有限公司服务质量的真实看法。结果显示了这些公司的许多弱点,尤其是在可靠性和信任因素方面。最后,提出一些建议以评估Simera运输有限公司货运的服务质量。本文共有图3个,表11个,参考文献50篇。

关键词：服务质量模型客户服务客户满意度道路货运

环取代基对金属化聚苯胺衍生物膜修饰电极性能的影响

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高等学校化学学报 2002年第7期23卷 1404-1408页

作者：戴李宗许一婷 jean-yves GAL 吴辉煌厦门大学化学化工学院固体表面物理化学国家重点实验室 UMR Laboratoire Hydrosciences(CNRS UMIIIRD)Maison des Sciences de l'Eau de MontpellierUniversité Montpellier Ⅱ34095 Montpellier Cedex 05France

通过比较聚 2 ,5 -二甲氧基苯胺 (PDMAn)、聚邻甲基苯胺 (POT)和聚间氯苯胺 (Pm Cl An)膜修饰电极的氧化还原电位、沉积在这 3种聚合物上的铂微粒的表面形态与晶面取向以及异丙醇在分散 Pt微粒的聚苯胺膜修饰电极上的氧化行为 ,从电子... 详细信息

通过比较聚 2 ,5 -二甲氧基苯胺 (PDMAn)、聚邻甲基苯胺 (POT)和聚间氯苯胺 (Pm Cl An)膜修饰电极的氧化还原电位、沉积在这 3种聚合物上的铂微粒的表面形态与晶面取向以及异丙醇在分散 Pt微粒的聚苯胺膜修饰电极上的氧化行为 ,从电子效应和立体效应探讨了聚合物电化学性质与环取代基的关系以及不同聚合物基质对 Pt沉积机理和电极催化性能的影响 .结果表明 ,在硫酸溶液中 PDMAn膜修饰电极的氧化还原电位最负、 POT次之、 Pm Cl An最正 .Pt在 PDMAn和 POT膜上的电沉积机理与在 Pm Cl An膜上的不同 ,聚合物膜上沉积的 Pt微粒呈现 (2 0 0 )晶面择优取向 ,其中 POT膜上择优取向度最大 ,PDMAn次之 ,Pm Cl An最小 .异丙醇在金属化聚合物膜电极上的氧化电位取决于聚苯胺的本质 ,在 POT膜修饰电极上异丙醇的电氧化主要发生在 POT的活性电位区 ,而在 PDMAn与 Pm Cl An膜上的电氧化则主要发生在 Pt上的氧化电位区 ,说明聚合物膜不仅作为 Pt微粒的分散介质 ,而且本身可能产生催化作用 .

关键词：金属化聚苯胺衍生物膜环取代聚苯胺金属-聚合物复全材料异丙醇电氧化化学修饰电极电极材料导电聚合物滴除法

Chronic fatigue syndrome with history of severe infection combined altered blood oxidant status, and reduced potassium efflux and muscle excitability at exercise

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Open Journal of Internal Medicine 2013年第3期3卷 98-105页

作者： yves Jammes jean Guillaume Steinberg Regis Guieu Stephane Delliaux Clinical Respiratory Physiology Exercise Testing Laboratory North Hospital Public Health-Hospitals in Marseille Marseille France UMR MD2 Faculty of Medicine Aix-Marseille University Marseille France

It is documented that chronic fatigue syndrome (CFS) combines enhanced oxidative stress with altered muscle excitability. We hypothesized that these disorders may be accentuated when severe infection preceded the CFS symptoms. This case-control study compared 55 CFS patients to a matched control group of 40 healthy subjects. In twenty-five CFS patients, severe infection was reported within the three to seven?month period preceding the CFS symptoms. The others had practiced sport at high level. Plasma concentrations of potassium, a marker of lipid peroxidation (thiobarbituric acid reactive substances, TBARS), and an endogenous antioxidant (reduced ascorbic acid, RAA) were measured. Action potential (M-wave) was evoked in the vastus lateralis muscle to explore the muscle membrane excitability. All subjects performed a maximal incremental cycling exercise. Compared to control subjects, all CFS patients presented an elevated resting TBARS level and, during and after exercise, an altered M-wave configuration. History of infection was associated with marked significant increase in resting TBARS level, enhanced M-wave alterations, and also reduced exercise-induced potassium efflux. The magnitude of exercise-induced M-wave alterations was proportional to the baseline TBARS level. Severe infection preceding CFS seems to constitute a stressor inducing altered blood oxidant status and a reduced muscle excitability at work.

关键词： Chronic Fatigue Syndrome Infectious Diseases Muscle Excitability Oxidative Stress

High Intensity Focused Ultrasound Optimal Device Design for Targeted Prostate Cancer Treatment: A Numerical Study

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Journal of Modern Physics 2013年第2期4卷 240-245页

作者： Laura Curiel Dexter Hobson jean-yves Chapelon Samuel Pichardo Lakehead University Thunder Bay Regional Research Institute Ontario Canada National Institute of Health and Medical Research (INSERM) Lyon France

A parametric study was performed to design a device capable of treating small targeted regions within the prostate using high intensity focused ultrasound, while sparing the surrounding organs and minimizing the number of elements. The optimal focal length (L), operating frequency (f), element size (a) and central opening radius for lodging an imaging probe (r) of a device that would safely treat tissue within the prostate were obtained. Images from the Visible Human Project were used to determine simulated organ sizes and treatment locations. Elliptical tumors were placed throughout the simulated prostate and their lateral and axial limits were selected as test locations. Using graphics processors, the acoustic field and Bio-Heat Transfer Equation were solved to calculate the heating produced during a simulated treatment. L, f, a and r were varied from 45 to 75 mm, 2.25 to 3 MHz, 1.5 to 8 times the wavelength and 9 to 12.5 mm, respectively. The resulting optimal device was a 761-element concentric-ring transducer with L = 68 mm, f = 2.75 MHz, a = 2.05λ and r = 9 mm. Simulated thermal lesions showed that it was possible to treat target tumors consistent with reported locations and sizes for prostate cancer.

关键词： Focused Ultrasound Prostate Cancer Thermal Ablation Non-Invasive Treatment BHTE HIFU

Septate uterus with cervical duplication and longitudinal vaginal septum:A two case series

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Laparoscopic, Endoscopic and Robotic Surgery 2019年第1期2卷 21-24页

作者： Noa Ndoua Claude Cyrille Ayissi Gregory Mendibi Sandrine Belinga Etienne Metogo Junie Kasia Onana yves Bertrand Kasia jean-Marie Departement of Gynecology and Obstetrics Faculty of Medicine and Biomedical ScienceUniversity of Yaounde IYaoundeCameroon Hospital Center for Research and Application in Endoscopic Surgery and Human Reproduction YaoundeCameroon

Müllerian duct anomalies consist of a set of structural malformations resulting from abnormal development of the paramesonephric or Müllerian *** in lateral fusion may result in uterus didelphys,bicornuate uterus or arcuate uterus while,reabsorption failure results in a uterus with a partial or complete *** reported a series of two cases of a woman with a septate uterus,cervical duplication and longitudinal vaginal septum undergoing an in vitro fertilization *** uterus with double cervix and longitudinal vaginal septum is a rare *** reported its endoscopic management in two infertile *** metroplasty which is a safe and simple approach for the removal of the uterine septum can improve reproductive outcomes but in vitro fertilization can be an alternative approach for these patients.

关键词： Septate uterus Cervical duplication Metroplasty Hysteroscopy

Indoor Narrowband Power Lines Channel Characterization

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Journal of Control Science and Engineering 2014年第2期2卷 61-69页

作者： Anouar Achouri jean-Charles Le Bunetel yves Raingeaud Richard Nizigiyimana LAN (Laboratoire des Applications Numerique) Digital Lab Tauxigny 37165 France GREMAN (Research Group on Materials Microelectronics and Acoustics Nanotechnology) University of Tours Tours 37200France

Power line is an efficient media for home area networking communication scenarios. However, it is not designed to transmit data. This causes several perturbations phenomenon for communications technologies over the power cables. This work presents an investigation of the indoor narrowband power lines channel behavior. The load, the transmission line length and the network topology impact are studied using a simple network. A channel response measure campaign has been realized in 13 sites. The channel capacity has been used for channel classification. The measures were classified into 5 classes. It is shown that channel response is mainly impacted by the load impedance. The class distributions are more impacted by the nature of appliances connected into the indoor network.

关键词： Power lines channel narrowband load impedance channel classification.

Mass Transfer around a Rising CO2 Bubble in an Air Lift Column Applied to Aquaculture

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Natural Resources 2020年第5期11卷 205-217页

作者： Djimako Bongo Edith Kadjagaba Nekoulnang Djetounako Clarisse jean-yves Champagne National Institute of Science and Technology of Abéché Abéché Chad Faculty of Exact and Applied Sciences University of N’Djamena N’Djamena Chad Laboratory of Fluid Mechanics and Acoustics INSA-Lyon Lyon France

He mentioned in the 18th century the possibility of injecting gas bubbles into a column of liquid to create a displacement of this liquid due to the rise of bubbles. This system takes the name of Air Lift and the first publications around this process appear at the beginning of the 20th century. There are many economic and ecological interests: CO2 from industrial production is valued because it is consumed by algae, which once they reach maturity can be converted into fuel. It is therefore a very good energy balance thanks to a low consumption of gray energy and the system is simple to set up. In this study, we will delve deeper into the description of the bubble column and the theory that accompanies it. We will then describe our experiences and the work done.

关键词： Mass Transfer PLIF PIV Transverse Velocity CO2