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如何选择加热器绝缘材料

现代塑料 2009年第6期 44-45页

作者： John pape 《现代塑料》编辑部

为塑料加工应用选择合适的加热器非常重要，尤其是在较高的温度应用中更是如此。当购买者懂得了诸如温度．性能和效率这些绝缘材料参数的重要性时．利用绝缘材料类型的细目分类．就能为其应用选择到合适的加热器。

关键词：绝缘材料加热器加工应用材料类型材料参数购买者温度塑料

Comparative urbanization of birds in China and Europe based on birds associated with trees

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Current Zoology 2019年第6期65卷 617-625页

作者： Anders pape MOLLER Canwei XIA Bo ZHOU Xianli CHE Xingzhi CHE Changzhang FENG Karsten LAURSEN Federico MORELLI Wangming LI Jianping LIU Qing QUAN Min ZHANG Qiang ZHANG Qiangwen ZHAN Laikun MA Haitao WANG Fasheng ZOU Wei LianG Ecologie Systematique Evolution University Paris-SudCNRSAgroParisTechUniversity Paris-SaclayOrsay CedexFrance Ministry of Education Key Laboratory for Biodiversity and Ecological Engineering College of Life SciencesBeijing Normal UniversityBeijingChina Ministry of Education Key Laboratory for Ecology of Tropical Islands College of Life SciencesHainan Normal UniversityHaikouChina Guangdong Key Laboratory of Animal Conservation and Resource Utilization Guangdong Public Laboratory of Wild Animal Conservation and UtilizationGuangdong Institute of Applied Biological ResourcesGuangzhouChina Institute of Bioscience Aarhus UniversityDenmarkDenmark Faculty of Environmental Sciences Department of Applied Geoinformatics and Spatial PlanningCzech University of Life Sciences PraguePragueCzech Republic Jilin Provincial Engineering Laboratory for Avian Ecology and Conservation Genetics Northeast Normal UniversityChangchunChina

Urbanization effects on living organisms are spatially *** we quantified the abundance of birds per tree in forested urban and rural habitats for 85,829 trees mainly in China and Europe.A population model was based on the assumption that:1)birds have a normally distributed habitat preference;2)an increase in population size linked to the habitat preference;3)a population size dependent on the habitat preference;and 4)the removal of a certain fraction of individuals giving rise to *** tested for large-scale differences in the impact of urbanization on the frequency distribution of the difference in abundance between urban and rural habitats in China and parts of *** difference in the frequency distribution of urban population density of birds in trees minus rural population density of birds in trees in China and Europe was statistically significant suggesting that the abundance of birds differed between trees in urban and rural habitats,but more so in China than in *** hypothesize that more pronounced differences in China than in Europe may have arisen due to the Four Pests Campaign in 1958-1962 that resulted in death of hundreds of millions of birds(mainly tree sparrows Passer monfanus,but also numerous other less common species that were starting to become urbanized around 1960).Species that were less common in 1960 could not sustain reductions in population size in urban areas and hence these species are still rare or absent in urban areas today 60 years later.

关键词： AN0SIM community composition distribution frequency skewness habitat preference human-bird interactions kurtosis sociality

Influence of Prandtl Number on Thin Film Condensation in Forced Convection in an Inclined Wall Covered with a Porous Material

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Advances in Materials Physics and Chemistry 2022年第6期12卷 125-140页

作者： Goumbo Ndiaye Momath Ndiaye Vincent Sambou pape Tamsir Ndiaye Madialène Sène Cheikh Mbow The Water Energy Environment and Industrial Processes Laboratory of the Polytech Higher School Cheikh Anta Diop University Dakar Senegal Laboratory of Fluids Mechanics and Transfers Faculty of Sciences and Technologies Cheikh Anta Diop University Dakar Senegal Department of the Ufr Hydraulics Rural Engineering Machinery and Renewable Energy University of Sine Saloum Elhadji Ibrahima NIASS Kaolack Senegal

The numerical study of thin film type condensation in forced convection of a saturated pure vapor in an inclined wall covered with a porous material is presented. The generalized Darcy-Brinkman-Forchheimer (DBF) model is used to describe the flow in the porous medium while the classical boundary layer equations have been exploited in the case of a pure liquid. The dimensionless equations are solved by an implicit finite difference method and the iterative Gauss-Seidel method. The objective of this study is to examine the influence of the Prandtl number on the hydrodynamic and thermal fields but also on the local Nusselt number and on the boundary layer thickness. For Pr ≤ 0.7 (low) the velocity and the longitudinal temperature increase with the Prandtl number. On the other hand, when Pr ≥ 2 (high) the Prandtl number no longer influences the velocity and the longitudinal temperature. The local Nusselt number increases as the Prandtl number increases and the thickness of the hydrodynamic boundary layer increases as the Prandtl number decreases.

关键词： Condensation Thin Film Forced Convection Inclined Porous Wall Generalized Darcy-Brinkman-Forchheimer Model Prandtl Number

Influence of the Magnetic Field on the Transient Decay of the Density of Charge Carriers in a Silicon Photocell with Vertical Multijunctions Connected in Series Placed in Open Circuit

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Energy and Power Engineering 2022年第12期14卷 747-761页

作者： Papa Monzon Alassane Samake Papa Touty Traore Babou Dione pape Diop Fatimata Ba Mamadou Wade Physics Departement Cheikh Anta Diop University Dakar Senegal Polytechnic School of Thies Water and Environmental Science and Technology Laboratory Thies Senegal

This study investigates the effect of the magnetic field on the transient density of excess minority charge carriers in the base of a series-connected vertical junction silicon solar cell. The solar cell is presented in open circuit transient operation. The magnetic field through the Laplace force which deflects the photogenerated carriers from their initial trajectory towards the lateral surfaces reducing their mobility, diffusion and conduction, will certainly influence the decay time of the transient regime. The transient density of excess minority carriers in the base is a sum of infinite terms whose decay time of the different harmonics is studied.

关键词： Silicon Solar Cell-Series Vertical Junction Recombination Velocities Magnetic Field Base Thickness (P) Eigenvalues Decay Time Constant

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麻雀幼鸟和成鸟逃逸距离的比较

动物学杂志 2019年第5期54卷 627-635页

作者：张谦益钟浩何飘雨 M?ller Anders pape 夏灿玮北京师范大学生命科学学院

逃逸是鸟类常用的反捕食手段。自然选择会优化鸟类的逃逸距离,以便在躲避被捕食风险和保持能量之间做出权衡。理论模型预测动物个体可依据期望寿命来调整自身的行为:期望寿命短的个体倾向于风险偏好,即逃逸距离短;而期望寿命长的个体倾... 详细信息

逃逸是鸟类常用的反捕食手段。自然选择会优化鸟类的逃逸距离,以便在躲避被捕食风险和保持能量之间做出权衡。理论模型预测动物个体可依据期望寿命来调整自身的行为:期望寿命短的个体倾向于风险偏好,即逃逸距离短;而期望寿命长的个体倾向于风险回避,即逃逸距离长。同时,逃逸距离还受到外部因素(如人为干扰强度、鸟类群体大小)的影响。本研究在北京城区收集了麻雀(Passer montanus)145只成鸟和75只幼鸟的逃逸距离数据,发现麻雀成鸟比幼鸟有着更长的逃逸距离,且成鸟更可能是群体中首先逃逸的个体。此外,研究发现麻雀的逃逸距离随着人为干扰强度的增加而降低,随着群体大小增加而增加。本研究结果符合理论预期:存活率高的类群(成鸟)有着更长的逃逸距离。

关键词：逃逸警戒距离惊飞距离飞逃距离麻雀年龄

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解决电热器内的湿气问题

中国设备工程 2008年第6期 48-49页

作者： John pape Watlow

使用电子设备的人通常因充分的理由将7K和电视为最坏的组合。在电动刀具和理发吹发机等许多厨具和浴室电子设备上可以发现标签，警告用户如果设备接触7K，可能会触电。

关键词：电热器湿气电子设备触电

Coronary Angioplasty in a Low Income Sub-Saharan Country: Situational Analysis

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World Journal of Cardiovascular Diseases 2018年第12期8卷 539-544页

作者： Mouhamed Cherif Mboup Djibril Marie Ba Modou Jobe Massamba Thiam Khadidiatou Dia pape Diadie Fall Hopital Principal de Dakar Dakar Senegal Military Hospital of Ouakam Dakar Senegal Clinique Du Golf Dakar Senegal

Introduction: Coronary angioplasty is not widely conducted in sub-Saharan Africa in general and Senegal in particular. The objective of this work was to describe the indications, techniques, results and difficulties of coronary angioplasty in Senegal. Patients and Methods: We prospectively included all patients who underwent coronary angioplasty between July 2012 and November 2014. We evaluated the clinical characteristics, techniques used, and the peri-procedural complications. Results: 110 coronary angioplasties were performed at the cardiac catheterisation unit of the Clinique du Golf in Dakar. The average age of patients was 60.41 ± 10.93 years. A male predominance was noted with a sex ratio of 6.3. Hypertension was found in 57% of patients. The principal indications for coronary angioplasty were for the management of acute coronary syndromes with or without ST elevation, in 29 and 39 patients respectively. The femoral artery was the puncture site in 104 patients. The lesions treated were type A/B1 or B2/C in 53 and 57 cases respectively. The success rates of coronary angioplasties and 30-day mortality were 91% and 0.9% respectively. Conclusion: In sub-Saharan Africa, Senegal in particular, the practice of coronary angioplasty is low. Indeed, many factors linked to socioeconomic status limit the development of coronary angioplasty in Senegal.

关键词： Coronary Angioplasty Acute Coronary Syndrome Interventional Cardiology

Indications and Results of Repair of the Rhumatismal Valve in Children in Senegal concerning 63 Cases

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World Journal of Cardiovascular Surgery 2020年第5期10卷 51-58页

作者： Momar Sokhna Diop Papa Amath Diagne Ndeye Fatou Sow Papa Salmane Ba Magaye Gaye pape Ousmane Ba Souleymane Diatta Moussa Seck Diop Mareme Soda Mbaye pape Adama Dieng Amadou Gabriel Ciss Assane Ndiaye Thoracic and Cardiovascular Surgery Center Cheikh Anta Diop University Dakar Sénégal

In Africa, acute rheumatic fever is endemic. Cardiac involvement is one of the most common complications in the form of valvular heart disease representing all damages to the heart valves. It is in this perspective that we realized this study whose general objective was to evaluate the results of mitral repair surgery in children in Senegal and the specific objective was to state the indications for mitral repair surgery and assess the results in terms of morbidity and mortality. This is a retrospective and analytical monocentric study, in the thoracic and cardiovascular surgery department of FANN National University Hospital Center in Dakar. It took place over a period of 30 months. All the patients who underwent mitral surgery, aged less than 18 years were included. The total number of patients was 63, including 39 girls and 24 boys, a sex ratio of 0.62. The average age at the time of the surgery was 12 years old [5 - 17]. The functional symptomatology was dominated by the dyspnea found in all the patients. Cardiac ultrasound was diagnosed with mitral regurgitation in all patients. For all surgical procedures, the approach was a vertical midline sternotomy. The mitral valve was approached by left atriotomy in 40 patients (63.5%) and by transseptal way in 23 patients. All patients had undergone mitral valve repair associated or not with either aortic valve repair in 9 patients (14.2%), aortic valve replacement in 3 patients (4.8%), or one tricuspid valve repair in 31 patients (49%). The average duration of intubation was 6 hours [2 - 52]. The average length of stay in intensive care was 2 days. Postoperative complications have been observed. Surgery was performed in 10 patients with 3 mitral valve replacements, 2 aortic valve replacements, a double mitral and an aortic valve replacement associated with a tricuspid repair and in 4 cases a perfection of their mitral repair. Early and late surgical mortality was zero. The average follow-up time for our patients was 9

关键词： Mitral Valve Repair Acute Rheumatic Fever Senegal

Minimally Invaded Sentinel Lymph Node Model for the Development of Intraoperative Infrared Fluorescence Imaging

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Advances in Molecular Imaging 2018年第4期8卷 48-58页

作者： Badiane Serigne Moussa Raes Florian Julien Sobilo Natkunarajah Sharuja Lerondel Stéphanie Le pape Alain UFR des Sciences de la Santé Université Gaston BERGER Saint-Louis Sénégal Centre for Small Animal Imaging PHENOMIN-TAAM CIPA CNRS UPS44 Orléans France

In this study we implemented an axillary SLN invasion model to develop highly sensitive imaging strategies enabling detection of a very small amount of tumor cells. A highly diffusible molecular probe targeting αvβ3 and αvβ5 integrins was investigated either via IV or locoregional injections. We additionally documented the potential interferences of this Near Infrared Fluorescence Probe with Blue Patente V and ICG dyes routinely used to facilitate lymph node detection during surgery. The human mammary adenocarcinoma MDA-MB-231-luc model was injected into the forepaw of nude female rats to obtain a controlled invasion of the axillary LN. Thanks to its high sensitivity, BLI was selected to achieve in vivo quantitation of tumor cells in SLNs and determine eligible animals for the study. NIRF of integrins was performed at 680 nm both in vivo and ex vivo using spectral unmixing to suppress auto-fluorescence signal and preserve sensitivity. In vivo BLI was quite reliable in estimating discrete invasion by cancer cells in the LN with thresholds of detection and quantitation of about 500 and 1500 cells respectively. For fluorescence at 680 nm, in vivo imaging is not suitable to detect micro-invasion, but ex vivo fluorescence with spectral unmixing of SLNs confirmed the presence of a tumor burden as low as 1500 cells expressing αvβ3/αvβ5 integrins. Targeting few tumor cells inside a micro-invaded sentinel lymph node by molecular probes is not sensitive enough to provide direct in vivo or peroperative imaging. At the time NIRF is performed on the excised specimen, high sensitivity imaging associated with spectral unmixing allowed such detection within less than 1 minute of examination.

关键词： Sentinel Lymph Node Near Infrared Fluorescence Imaging Photoacoustic Imaging Molecular Imaging