检索结果-南通市图书馆

Parametric robust H2 control

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Parametric robust H2 control

On the Centre of Mass Motion in Human Walking

2011 Chinese Control and Decision Conference（CCDC）

作者： L.Ravanbod-Hosseini D.Noll P.Apkarian université paul sabatier Institut de Mathématiques118 route de Narbonne31062 ToulouseFrance laleh

H2-control with structured controllers is discussed,and a way to enhance the robustness of the design with respect to real uncertain parameters is proposed.

关键词： Structured H2 control parametric robustness

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2017年第5期14卷 542-551页

作者： Justin Carpentier Mehdi Benallegue Jean-paul Laumond LAAS-cnrs University of Toulouse Humanoids Research Group National Institute of Advanced Industrial Science and Technology

The center of mass （CoM） is a key descriptor in the understanding and the analysis of bipedal locomotion. Some approaches are based on the premise that humans minimize the CoM vertical displacement. Other approaches express walking dynamics through the inverted pendulum model. Such approaches are contradictory in that they lead to two conflicting patterns to express the CoM motion： straight line segments for the first approaches and arcs of a circle for the second ones. In this paper, we show that CoM motion is a trade-off between both patterns. Specifically, CoM follows a ＂curtate cycloid＂, which is the curve described by a point rigidly attached to a wheel rolling on a flat surface. We demonstrate that all the three parameters defining a curtate cycloid only depend on the height of the subjects.

关键词： Human locomotion analytical model centre of mass locomotion signature synergies.

维普期刊数据库

Dinitrogen cleavage and hydrogenation to ammonia with a uranium complex

在线全文

学校读者我要写书评

暂无评论

National Science Review 2023年第2期10卷 165-173页

作者： Xiaoqing Xin Iskander Douair Yue Zhao Shuao Wang Laurent Maron Congqing Zhu State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical EngineeringNanjing University School of Medicine and Holistic Integrative Medicine Nanjing University of Chinese Medicine LPCNO CNRS and INSA Université Paul Sabatier State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow University

The Haber-Bosch process produces ammonia(NH3) from dinitrogen(N2) and dihydrogen(H2),but re quires high temperature and *** iron-based catalysts were exploited in the current industrial Haber-Bosch process,uranium-based materials served as effective catalysts for production of NH3from *** some molecular uranium complexes are known to be capable of combining with N2,further hydrogenation with H2forming NH3has not been reported to ***,we describe the first example of N2cleavage and hydrogenation with H2to NH3with a molecular uranium *** N2cleavage product contains three uranium centers that are bridged by three imido μ2-NH ligands and one nitridoμ3-N *** experiments with15N demonstrate that the nitrido ligand in the product originates from *** of the N2-cleaved complex with H2or H+forms NH3under mild conditions.A synthetic cycle has been established by the reaction of the N2-cleaved complex with trimethylsilyl *** isolation of this trinuclear imido-nitrido product implies that a multi-metallic uranium assembly plays an important role in the activation of N2.

关键词： N

Structural Dynamics in Biology: A Bridge Given by Implicit Vibratory Crossed Models

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Engineering（科研） 2021年第5期13卷 237-256页

作者： Yves Gourinat Laura Christon Frédéric Lachaud ISAE-SUPAERO université de toulouse Toulouse France ITIC université paul-Valéry Montpellier Montpellier France

This article proposes a synthesis and contribution at three levels: generation of dynamic equations of shell structures interacting with fluids, reduction of implicit resolution, and cross-applications to aerospace tanks and living systems. The synthesis of the equations is proposed around the four principles of thermodynamics at the level of discrete, structural and digitized systems. The implicit approach envisages an innovative analysis in terms of condensation and digitization, with in particular a perspective towards singular and integral methods. Some illustrations are proposed, in the field of performed research models and also in the fields of educational applications in biodynamics. The proposed bridge links, on one hand, the analytical Lagrange-Feynman’s approach, and on the other hand experimental results obtained in laboratory and numerical experiments obtained with multiphysics software. Finally, the realized models concern conservative and dissipative models for the active and passive control of complex systems, in a unified approach.

关键词： Vibrations Fluid Shell Interaction General Dynamics Implicit Dynamics Structural Entropy Biophysics

Laboratory scale study of an industrial phosphate and thermal treatment for polluted dredged sediments

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 Journal of Sediment Research 2012年第4期27卷 538-546页

作者： Souhila KRIBI Jocelyn RAMAROSON Ange NZIHOU Patrick SHARROCK Guy DEPELSENAIRE Ecole des Mines d'Albi-Carmaux RAPSODEE UMR-CNRS 2392Route de Teillet-81013 ALBI CT Cedex 09France Ph.D. paul sabatier university Solvay DCRTRue de Ransbeek 310BrusselsBelgium

Dredged sediments are being chemically treated with phosphoric acid on an industrial *** effectiveness of the treatment was evaluated by performing the chemical reaction in a tubular reactor, followed by convective drying and maturation of the treated sediment at ambient temperature and finally thermal destruction of the organic matter by calcinations(500℃-900℃).The influence of acid concentration and calcination temperature on the specific surface area of the sediment was investigated. The stabilization of the heavy metals was evaluated by leaching tests and sequential extraction *** phosphoric acid treatment is effective in reducing heavy metal mobility,a prerequisite for recycling the sediments in various construction materials.

关键词： Dredged sediments Heavy metal pollution Chemical treatment Thermal treatment

Experimental Investigation of Effects of Electric Operating Parameters on Pulsed Corona Discharges in Humid Air at Atmospheric Pressure

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Analytical Sciences, Methods and Instrumentation 2018年第4期8卷 49-64页

作者： Hasna Guedah Alyen Abahazem Nofel Merbahi Mohamed Yousfi Karim Saber Ahmed Ihlal Laboratory Materials and Renewable Energies Physics Department Ibn Zohr University Agadir Morocco CRMEF-SM Inezgane Morocco LAPLACE UMR 5213-cnrs Paul Sabatier University Toulouse France

The present work is devoted to electrical and optical study of a point-plane atmospheric pressure corona discharge reactor in humid air powered by pulsed high voltage supply. The corona current and the injected energy are analyzed as a function of several parameters such as applied voltage and humidity rate. Then, investigations based on emission spectroscopy analysis were used in UV range (from 200 nm to about 400 nm). The main observed excited species were the second positive (SPS), the first negative (FNS) systems and OH(A-X) rotational bands. The latter band was used to simulate the rotational temperature (Tr), whereas the N2+ (FNS) band was used to determine the vibrational temperature (Tv). The electron temperature (Te ) is determined from the ratio of line intensities of the spectral bands of both N2+ FNS at 391.4 nm and N2SPS at 394.4 nm. The rotational, vibrational and electronic temperatures are analyzed as a function of above parameters (applied voltage, frequency and hygrometry rate) near the anodic tip. As well we study the axial variation of electronic temperature for a fixed applied voltage at 6.4 kV, frequency at 10 kHz and 100% of humidity. It is found that the rotational, vibrational and electronic temperatures increased with increasing applied voltage, frequency and humidity rate. The increase of rate hygrometry for an inter-electrode distance fixed at 10 mm causes an increase in both the amplitude of the corona current discharge and the energy injected in corona discharge. This is indicative of more intense reactive plasma while increasing hygrometry rate.

关键词： Corona Discharge Atmospheric Pressure Optical Emission Spectroscopy Pulsed High Voltage Humidity

Use of Landsat 8 OLI Images to Assess Groundwater Potential Areas in the Bamun Plateau: Cameroon Volcanic Line (CVL)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Water Resource and Protection 2020年第7期12卷 558-576页

作者： Oumar Farouk Mouncherou Olivier Njikeu Brice Tchakam Kamtchueng Amidou Kpoumié Zakari Mfonka Oumarou Farikou Mfochive Yvette Frida Danwe Mohammad Bello Amidou Moundi Jules Remy Ndam Ngoupayou Jean Claude Tonga Institute of Mining and Geological Research (IRGM) Yaounde Cameroon Department of Earth Sciences University of Yaounde I Yaounde Cameroon Department of Earth Sciences University of Maroua Maroua Cameroon Spatiale Studies Center of the Biospher UMR 5126 CNRS-CNES-IRD-UPS IUT Paul Sabatier Toulouse France

The problem of groundwater supply in the Bamun plateau situated in the Cameroon Volcanic Line exists and no proper solution has been found so far. This investigation intends to find the suitable groundwater potential zones by overlaying the geomorphologic map, lineament map, lineament density map and lithological map, using visual interpretation of Landsat imagery. The results reveal that about 1921 structural elements, ranging in size, from 30 m to 5.845 km with an average length of 671 m in the field. The total length of the mapped lineaments is approximately 1289 km. The most important lineament (5.845 km length) diagonally crosses the study area in the direction NNE-SSW. In addition to this trend, all others are smaller than 14 km. More than 92% of lineaments are less than 5 km in size and only 1.3% of them are larger than 10 km. Small lineaments are thus the most numerous. According to their directions, the lineaments listed are grouped into 18 directional classes of 10-degree intervals. The rosette of their directions highlights the preferred directions NE-SW, N-S, E-W, NNE-SSW and ENE-WSW. Most of the lineaments clusters in the central part of the area are N20° - 30°E and N60° - 70°E trending lineaments. In this study, the NE-SW trend dominates the structural trend followed by NW-SE and N-S. This can be an indication of the directions of groundwater movement in the area. Alluvial plain and valley have moderate to very good groundwater potential that occurs all over the study area. Porosity of the volcanic rocks varies greatly, but it is everywhere more porous than the underlying, unweathered bedrock. There are essentially three classes (low, average and high) of groundwater potential zones. Hight potential zones are observed around the localities of the Khogham, Mbatpit and Mbam massifs on the one

关键词： Bamun Plateau Aquifer Lineaments Landsat Imageries Groundwater

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于汞同位素的全球汞循环模型

基于汞同位素的全球汞循环模型

法国比利牛斯山Trimouns滑石-绿泥石矿床地质与成因(英文)

中国矿物岩石地球化学学会第九次全国会员代表大会暨第16届学术年会

作者：孙若愚 Sonke J.E. 天津大学表层地球系统科学研究院 cnrs/ird/université paul sabatier toulouse 3 Laboratoire Géosciences Environnement Toulouse

汞在自然界有7个稳定同位素:Hg(0.16%)、Hg(10.0)、Hg(16.9%)、Hg(23.1%)、Hg(13.2%)、Hg(29.7%)和Hg(6.82%),不但具有常见的质量分馏,而且还有奇数同位素的非质量分馏。此外,近期越来越多的研究表明大气过程还可能产生非常明显的偶数... 详细信息

汞在自然界有7个稳定同位素:Hg(0.16%)、Hg(10.0)、Hg(16.9%)、Hg(23.1%)、Hg(13.2%)、Hg(29.7%)和Hg(6.82%),不但具有常见的质量分馏,而且还有奇数同位素的非质量分馏。此外,近期越来越多的研究表明大气过程还可能产生非常明显的偶数汞同位素的非质量分馏。汞同位素的多种分馏模式,极大拓展了汞同位素在环境化学、地球化学、地质学等领域的应用。当今的汞循环涉及多源复合式排放以及

关键词：汞污染循环模型非质量分馏汞同位素

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

岩石学报 2004年第4期20卷 877-886页

作者： Ph de PARSEVAL 蒋少涌 F FONTAN 王汝成 F MARTIN J FREEET UMR 5563-cnrs Laboratoire de Mecanismes de transfert en Géologie-universite paul sabatier-14 Av. Edouard Belin 31400 Toulouse France. State Key Laboratory for Mineral Deposits Research Departement of Earth Sciences Nanjing University Nanjing 210093 China UMR 5563-cnrs Laboratoire de Mecanismes de transfert en Geologie-universite paul sabatier-14 Av. Edouard Belin 31400 Toulouse France. universite de Limoges cnrs UMR 6532 'HydrASA' 123 avenue Albert Thomas 87000 Limoges France. Talc de Luzenac S. A. BP 11 09250 Luzenac France.

位于法国比利牛斯山的nimouns矿床是世界上最大的滑石-绿泥石矿床之一.对该矿床形成的条件及滑石和绿泥石矿石的含量已较清楚.它是由不同类型的岩石通过热液交代蚀变而形成的,主要包括白云岩蚀变为滑石为主的矿石和硅铝质岩石(云母片岩... 详细信息

位于法国比利牛斯山的nimouns矿床是世界上最大的滑石-绿泥石矿床之一.对该矿床形成的条件及滑石和绿泥石矿石的含量已较清楚.它是由不同类型的岩石通过热液交代蚀变而形成的,主要包括白云岩蚀变为滑石为主的矿石和硅铝质岩石(云母片岩和伟晶岩)蚀变为绿泥石为主的矿石.滑石矿石显示片理化结构(滑石片岩)或压实块状结构(块滑石).由伟晶岩蚀变而来的绿泥石矿石为呈绿色的球状矿体,而由云母片岩蚀变而来的绿泥石矿石呈块状或片理状、颜色为灰绿色和深灰色.本文对欧洲这个独一无二的滑石和绿泥石矿床的地质特征和成因进行了总结和讨论.流体包裹体研究表明成矿流体为高盐度(20 to30%***%NaCl)、中温(320℃)、压为为2.5kbars.磷钇矿和独居石的U-Pb定年结果表明,成矿年代为112～97Ma,成矿作用可能持续了16Ma以上.

关键词：滑石-绿泥石矿床热液交代过程法国Trimouns矿床

维普期刊数据库