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工具技术 2017年第1期51卷 I0002-I0003页

作者： jean—louis mACEY 山特维克可乐满大中华区

2016年山特维克可乐满的业务发展和中国机械加工市场一样都经历了一个先抑后扬的过程。在上半年，市场形势依旧低迷，我们也面临着很大的挑战，承受着很大的压力；进入下半年，中国制造业逐渐释放出积极的信号，机械行业开始回暖，尤其... 详细信息

2016年山特维克可乐满的业务发展和中国机械加工市场一样都经历了一个先抑后扬的过程。在上半年，市场形势依旧低迷，我们也面临着很大的挑战，承受着很大的压力；进入下半年，中国制造业逐渐释放出积极的信号，机械行业开始回暖，尤其到了第四季度，复苏的动力更加明显。一系列宏观经济数据给了我们很大的信心。制造业采购经理人指数、

关键词：市场形势数字化加工中国制造业机械加工业务发展机械行业经济数据经理人

Supervised Learning method: Critical Analysis and Updating of Cubing Rate Formulas for Determining Bark masses of Prunus africana (Hook. f.) Kalkman (Rosaceae) in Cameroon

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Variability of the Critical Frequency foF2 for Equatorial Regions during Solar Cycle’s minima and maxima at Ouagadougou and manila Stations

Open Journal of Forestry（林学期刊） 2024年第3期 346页

作者： Armand Ndedy Bile Alain mpouam Benoit Fouadjio Lorette Guedeu Kambale muhesi Steve Tassiamba Paulette Kouam Eric Wete marius Ela michèle Yimga Joseph Ambara louis Aimé Fono jean Lagarde Betti

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International Journal of geosciences 2019年第10期10卷 833-844页

作者： Kaboré m’Bi Zerbo jean louis Zoundi Christian Ouattara Frédéric Laboratoire de Recherche en Energétique et météorologie de l’Espace (LAREmE) Université Norbert Zongo Koudougou Burkina Faso Laboratoire de matériaux d’Héliophysique et Environnement (LAMHE) Université Nazi Boni Bobo Dioulasso Burkina Faso.

In this paper we report on the foF2 variabilities for two equatorial regions (Ouagadougou: Lat. 12.4°N;Long. 358.5°E, Dip. 1.43°S;and manila: Lat. 14°36'15.12''N;Long. 120°58'55.92''E;Dip. 0.6°S) during solar cycles 20 and 21 minima and maxima phases. many previous works have argued on the diurnal and seasonal variation of foF2 for different solar events conditions for latitudinal position. But there are few investigations for Africa equatorial region longitudinal variation. The present paper’s goal is to outline possible similarity in foF2 behavior between variations for better understanding of physical process lead to some observed phenomenon in Asia-Africa equatorial sector. The F-layer critical frequency (foF2) data observed from the two equatorial ionosonde stations have been used for the present comparative study. The results show significant similarity between the critical frequency (foF2) seasonal variations over the time intervals 1976-1996. During day-time measured data from manila station are higher than those from Ouagadougou station. That may lie in that manila is closer to equatorial ionization crest region. During solar minimum phase, the longitudinal variation of foF2 shows two crossing points (11:00 UT and 22:00 UT) between the foF2 profiles form the two stations for all seasons regardless of the solar cycle. However during intense solar activity condition, the number of crossing-point between measured data from manila and Ouagadougou stations varies by seasons and solar cycle. This phenomenon may be due to the compilations of severe activities (storms, coronal mass ejection, heliosheet fluctuations) during the solar maximum phases.

关键词： Critical Frequency (foF2) Longitudinal Variation Seasonal Solar Cycle

Channel Transmission Behavioral modeling Dedicated to WSNs

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Journal of Energy and Power Engineering 2012年第7期6卷 1042-1049页

作者： Nasreddine Nadim Boizard jean louis Christophe Escriba Fourniols jean Yves Laboratory for Analysis and Architecture of Systems LAAS University of Toulouse Toulouse F-31077 France

The design, manufacture and deployment of embedded systems become increasingly complex and multidisciplinary process. Before the steps of manufacturing and deployment, a simulation and validation phase is necessary. Given the increasing complexity of systems such as telecommunications systems, control systems and others, a specific simulation and validation process must take place. This simulation ideally made in a single development environment should cover different areas and all components of the system. In this paper, the authors briefly describe the behavioral models of the elements of a large scale WSN （wireless sensors network） used to create simulator, focusing specifically on the model of the transmission channel, and how it can retrieve results from the behavioral simulator. In side to legacy network simulator, for the testing and modeling of communication protocols, this simulator should not omit WSN specific aspect, in accuracy it covers the modeling of node platforms, protocols, and real world phenomena.

关键词： WSN VHDL-AmS BER PER.

企业家精神代际传递与农村迁移人口的城市创业

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经济研究 2017年第11期52卷 74-87页

作者：周敏慧 jean-louis ARCAND 陶然对外经济贸易大学公共管理学院 100029 瑞士日内瓦研究院中国人民大学经济学院汉青经济与金融高级研究院100872

本文建立了一个家庭选择模型来刻画农民工家庭在城市的创业行为,并利用一项流动人口调查数据,实证检验了企业家资本对后代从农村向城市迁移后职业选择的影响。研究发现,那些具有特定家庭出身的农村移民,进城之后会有更高可能性从事企业... 详细信息

本文建立了一个家庭选择模型来刻画农民工家庭在城市的创业行为,并利用一项流动人口调查数据,实证检验了企业家资本对后代从农村向城市迁移后职业选择的影响。研究发现,那些具有特定家庭出身的农村移民,进城之后会有更高可能性从事企业家型的创业活动。这表明,尽管一段历史时期进行的阶级成分划分在当时给这些家庭带来了人力与物质资本方面的负面冲击,但这些家庭的非物质资本依然可以在一定程度上实现代际传递,使其后辈在迁入城市后仍更可能成为企业家型自营者,并为社会创造就业机会。未来新型城镇化模式的建立及城镇化相关政策的制定都应该更多关注自我雇佣型流动人口,尤其是激励那些企业家型流动人口的创业行为。

关键词：家庭选择模型农民工企业家资本大众创业

Embedded FPGA Simulator for Wireless Sensor Network Design

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Journal of Energy and Power Engineering 2012年第6期6卷 984-992页

作者： Nasreddine Nadim Boizard jean louis Christophe Escriba Foumiols jean Yves Laboratory for Analysis and Architecture of Systems University of Toulouse Toulouse F-31077 France

The design, manufacture and deployment of embedded systems become increasingly complex and multidisciplinary process. Before the steps of manufacturing and deployment, a simulation and validation phase is necessary. In this paper, a WSN （wireless sensors network） emulator, implemented on a FPGA, is described by： describing some models as examples, how multiple simulations can be done when the device was configured and programmed once, and how results from the behavioral emulator can be extracted. The diversity of applications and the typically scarce node resources set very tight constraints to WSN. It is not possible to fulfill all requirements with a general purpose WSN, for which reason the rapid development of application specific WSNs is preferred. A new emulator for the design, simulation, and evaluation of WSNs, implemented on a very dense FPGA （field programmable gate arrays）, is presented, exploring the parallelism and his resources to do a very rapid simulation ofa WSN for long periods, and without overloading memory by the intermediate data.

关键词： WSN FPGA VHDL BER PER.

视知觉学习对于识别动态随机点立体图深度运动方向的作用（英文）

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生物化学与生物物理进展 2017年第7期44卷 615-624页

作者：张地 Vincent Nourrit 桑新柱 jean-louis de Bougrenet de la Tocnaye 北京邮电大学信息光子学与光通信国家重点实验室北京100086 Optics Deportment IMT AtlantiqueBrest 29280France

立体视觉不仅指对静态深度信息的感知,也包括对物体在三维空间中的运动方向的判断.本研究记录了人眼对于动态随机点图运动方向的辨别能力以及视觉训练在提高对动态信息分辨能力的作用.实验结果表明,对于没有任何相关经验的视力正常的受... 详细信息

立体视觉不仅指对静态深度信息的感知,也包括对物体在三维空间中的运动方向的判断.本研究记录了人眼对于动态随机点图运动方向的辨别能力以及视觉训练在提高对动态信息分辨能力的作用.实验结果表明,对于没有任何相关经验的视力正常的受试者,很难分辨出动态随机点的深度运动方向,而视觉训练可以大大提高人眼对物体深度运动方向判断的敏感度.此外,这种视觉训练所达到的效果具有较长时间的持续性(至少6个月).这种通过视觉训练提高受试者对立体运动信息敏感度的方式,为立体视觉相关的实验和研究提供了新的视角.

关键词：动态随机点立体图深度运动立体视觉视知觉学习

Total Electron Content Diurnal and Seasonal Variations and Response to Solar Events at Koudougou Station in Burkina Faso

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International Journal of geosciences 2023年第9期14卷 827-839页

作者： Yacouba Sawadogo m’Bi Kaboré Somaïla Koala Arouna mandé jean louis Zerbo Laboratoire de matériaux d’Héliophysique et Environnement (La.M.H.E) Université Nazi BONI Bobo-Dioulasso Burkina Faso

In this paper, we studied the seasonal behavior of the total electron content (TEC) during a part of solar cycle 24 ascending, maximum and decreasing phases at Koudougou station (Latitude: 12°15'09"N Longitude: 2°21'45"W). Response of TEC to solar recurrent events is presented. The highest values of the TEC in 2014, 2015 and 2016 were recorded on march and October, while in 2013 they were recorded on April and November, corresponding to equinox months. This observation shows that TEC values at the equinoxes are higher than those of solstices. moreover, the monthly TEC varies in phase with the sunspots number showing a linear dependence of the TEC on solar activity. The ionospheric electron contents are generally very low both before noon and during the night, but quite high at noon and after noon. This pattern of TEC variation is due to the fluctuation of incident solar radiation on the Earth’s equatorial ionosphere. During quiet periods, the number of free electrons generated is lower than that generated during recurrent periods, which shows a positive contribution of recurrent activity to the level of the TEC. Investigations have also highlighted a winter anomaly and equinoctial asymmetry in TEC behavior at Koudougou station.

关键词： Total Electron Content (TEC) Recurrent Activity Quiet Activity Seasonal Variation

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