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Geochemical evaluation of mineralization potential of the Somie-Ntem area within the Tikar plain,Cameroon:implication on petrogenesis

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Acta Geochimica 2022年第5期41卷 861-886页

作者： Mero Yannah Yaya Fodoue maurice Kwekam Benoit Joseph Mbassa Juliana Amboh Tifang Armand Dongmo Kagou Samuel Ndonwi Ayonghe Institute of Geological and Mining Research YaoundeCameroon Department of Earth Sciences University of DschangDschangCameroon Central Unit for Internal Control and Evaluation University of BueaBueaCameroon

Somie-Ntem area of the Tikar plain belongs to the western Cameroon *** lithology of the plain has been characterized,and the mineral potential is still unclear despite previous reports on Sn deposit within one of the magmatic *** results show two groups of granitic rocks displaying oxidized and reduced character;(1)mesocratic(oxidized)granites including biotitebearing,hornblende-biotite-bearing,hornblende-epidotebearing and pyroxene-bearing;(2)leucogranites(reduced)that are generally amphibole-pyroxene *** granitoids are hosted by gneisses and metasedimentary rocks partially covered by *** element composition shows high-K calc-alkaline to shoshonite affinity,metaluminous to weakly peraluminous I-type *** granites show moderately negative Eu anomaly,depleted in Nb,p,Ti,and are related to syn-collisional *** are post-orogenic with strong negative Eu anomaly,depleted in Ba and Sr and enriched in Hf,Nb and *** are fertile in Sn and Zn,enriched through postmagmatic metasomatism and ***–Cu–Ni–V mineralization occurs in hornblende-bearing gneisses and their enrichment suggests a possible Ni–Cutype pGEs mineralization in this ***,their trace element shows high Ni/Cu,very low Rb/Sr,low LILE and LREE which indicates mantle fractionation at *** absence of olivine and pyroxene,and increased SiO_(2)and Al_(2)O_(3)in the Cr–Cu–Ni–V-bearing rocks show that the parent magma experienced fractional crystallization and crustal contamination during ***,the high Zr/Rb and K/Rb ratios show that hydrothermal activity was not intense to enhance mineralization in the *** in the direction of stress during shear deformation inhibited an effective hydrothermal activity and ore deposition in the region.

关键词： Geochemistry Mineralization Somie-Ntem Tikar plain Cameroon

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Consumer Attitudes on Salt and Fat Reduced Foods in the Republic of Ireland

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Food and Nutrition Sciences 2018年第7期9卷 880-898页

作者： Susann Fellendorf Joseph p. Kerry maurice G. O’Sullivan The Sensory Group School of Food and Nutritional Sciences University College Cork Cork Ireland The Food packaging Group School of Food and Nutritional Sciences University College Cork Cork Ireland

public health campaigns are continually promoting healthier foods and in parallel many food manufacturers are working on recipes low in fat and salt. The following survey investigates how well consumers (n = 1045) in Ireland have assimilated the message of consuming healthier foods, including salt and fat reduced foods, into their diet. It seems that campaigns regarding the importance of a balanced diet have generally been adopted by respondents, as only a minority of the participants did not take care of their diet, independent of age, gender and level of education. More than half of the participants carefully maintained a balanced diet. Furthermore, an increase in purchasing salt reduced food was observed, though fat reduced food products were already better accepted. In general, men, young adults (people purchased less salt and fat reduced foods and took less care in maintaining a balanced diet. No conflict was observed for traditional foods reduced in salt and fat content when their intrinsic sensory character is maintained. The majority of the participants were aware of the health risks of a diet rich in salt and fat, though less participants transferred this knowledge into their diet. A very high demand for more salt and fat reduced foods on the market was observed although the smaller range of salt and fat reduced products and their higher prices might diminish the level of consumer acceptance. Launching taxation and subsidies in tandem might counteract this and furthermore, user-friendly product labelling schemes are required.

关键词： Survey Reduced Salt Fat Attitudes

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永磁同步电机负载转矩观测器

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电工技术学报 2010年第2期25卷 30-36页

作者：郑泽东李永东肖曦 maurice Fadel 清华大学电力系统及发电设备控制和仿真国家重点实验室北京100084 法国图卢兹国家理工学院INpT-ENSEEIHT LApLACE-CNRS实验室图卢兹31071

负载转矩的扰动会影响永磁同步电机控制系统的性能,测量或者观测负载转矩并用作前馈补偿,形成二自由度控制器可以减小负载转矩扰动的影响。本文研究分析了几种实用的永磁同步电机负载转矩观测器,可以根据测量的电流、机械位置和转速等... 详细信息

负载转矩的扰动会影响永磁同步电机控制系统的性能,测量或者观测负载转矩并用作前馈补偿,形成二自由度控制器可以减小负载转矩扰动的影响。本文研究分析了几种实用的永磁同步电机负载转矩观测器,可以根据测量的电流、机械位置和转速等准确观测负载转矩,不增加额外的硬件设备。全阶负载转矩观测器还可以根据机械传感器的输出量观测准确的转子位置和转速,代替了传统的转速计算方法,避免了微分计算,减小了测量噪声和离散误差的影响。以基于Kalman滤波器的负载转矩观测器为例,对观测器和前馈补偿的性能进行了仿真和实验验证。

关键词：负载转矩观测器 Luenberger观测器 Kalman滤波器永磁同步电机二自由度控制器前馈补偿

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基于扩展Kalman滤波器的pMSM高性能控制系统

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电工技术学报 2007年第10期22卷 18-23,29页

作者：郑泽东李永东 maurice Fadel 肖曦清华大学电机工程与应用电子技术系北京100084 图卢兹国家理工学院ENSEEIHT LEEI-CNRS实验室图卢兹31071

扩展Kalman滤波器考虑了系统噪声和测量噪声的影响,是一种基于最优控制理论的非线性估计方法。本文提出一种新型的用于永磁同步电机(pMSM)的基于扩展Kalman滤波器(EKF)的状态观测器,可以把有限精度的光电码盘信号的量化误差考虑为测量噪... 详细信息

扩展Kalman滤波器考虑了系统噪声和测量噪声的影响,是一种基于最优控制理论的非线性估计方法。本文提出一种新型的用于永磁同步电机(pMSM)的基于扩展Kalman滤波器(EKF)的状态观测器,可以把有限精度的光电码盘信号的量化误差考虑为测量噪声,从而可以精确观测转子位置和转子转速。电机不需要知道转子初始位置就可以起动。该状态观测器还可以观测负载转矩,利用观测的负载转矩形成对给定转矩的前馈补偿,可以大大改善负载转矩波动过程中的转速控制性能。在轻负载时永磁同步电机定子电流较小,因此电流测量过程中的噪声和干扰对系统性能的影响就非常明显。Kalman滤波器可以有效消除电流测量值中的干扰和测量噪声,提高系统在轻载时的性能。仿真和实验结果验证了该系统的性能。

关键词：扩展Kalman滤波器状态观测器负载观测初始位置前馈补偿

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Advanced protection against environmental degradation of silver mirror stacks for space application

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Journal of Materials Science & Technology 2021年第5期64卷 1-9页

作者： Rajendra Kurapati Vincent maurice Antoine Seyeux Lorena H.Klein Dimitri Mercier Gregory Chauveau Catherine Grees-Besset Loic Berthod philippe Marcus pSL Research University CNRS-Chimie ParisTechInstitut De Recherche De Chimie ParisPhysical Chemistry of Surfaces Group11 Rue Pierre Et Marie Curie75005 ParisFrance CILAS MARSEILLE 600 Avenue De La Roche FourcadePole ALPHA Sud-Saint Mitre13400 AubagneFrance CNES Sous-direction Assurance QualitéService TechnologiesMatériaux Et Procédés18 AvenueÉdouard Belin31401 ToulouseFrance

protection of silver mirror stacks from environmental degradation before launching is crucial for space ***,we report a comparative study of the advanced protection of silver mirror stacks for space telescopes provided by SiO_(2)and Al_(2)O_(3)coatings in conditions of accelerated aging by *** model silver stack samples were deposited by cathodic magnetron sputtering on a reference silica substrate for optical applications and a surface-pretreated SiC *** aging was per-formed in dry and more severe wet *** micrographic observations,surface and interface analysis by Time-of Flight Secondary Ion Mass Spectrometry(ToF-SIMS)and reflectivity measurements were combined to comparatively study the effects of *** results show a lower kinetics of degradation by accelerated aging of the stacks protected by the alumina coating in comparable test conditions.

关键词： Mirror layers protection Layers Silver Atmospheric corrosion Accelerated aging Surface analysis Space applications

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Evolving simple-to-use method to determine water-oil relative permeability in petroleum reservoirs

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petroleum 2016年第1期2卷 67-78页

作者： Mohammad Ali Ahmadi Sohrab Zendehboudi maurice B.Dusseault Ioannis Chatzis Department of petroleum Engineering Ahwaz Faculty of Petroleum Engineering Petroleum University of Technology Department of Chemical Engineering Massachusetts Institute of Technology (MIT) Department of Earth and Environmental Science University of Waterloo Department of Chemical Engineering University of Waterloo

In the current research, a new approach constructed based on artificial intelligence concept is introduced to determine water/oil relative permeability at various conditions. To attain an effective tool, various artificial intelligence approaches such as artificial neural network(ANN), hybrid of genetic algorithm and particle swarm optimization(HGApSO) are examined. Intrinsic potential of feed-forward artificial neural network(ANN) optimized by different optimization algorithms are composed to estimate water/oil relative permeability. The optimization methods such as genetic algorithm, particle swarm optimization and hybrid approach of them are implemented to obtain optimal connection weights involved in the developed smart technique. The constructed intelligent models are evaluated by utilizing extensive experimental data reported in open literature. Results obtained from the proposed intelligent tools were compared with the corresponding experimental relative permeability data. The average absolute deviation between the model predictions and the relevant experimental data was found to be less than 0.1% for hybrid genetic algorithm and particle swarm optimization technique. It is expected that implication of HGApSO-ANN in relative permeability of water/oil estimation leads to more reliable water/oil relative permeability predictions, resulting in design of more comprehensive simulation and further plans for reservoir production and management.

关键词： Crude oil Water Optimization Relative permeability Neural network porous media

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Risk Assessment at the Design phase of Construction projects in Ghana

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Journal of Building Construction and planning Research 2019年第2期7卷 39-58页

作者： maurice Azochiman Awuni University for Development Studies Tamale Ghana

The study was carried out exclusively in Ghana to explore the approaches employed by consultants in risk assessment at the design phase of projects in Ghana. One hundred and fourteen (114) consultants were selected out of a population of one hundred and eighty six (186) from three main professional associations in Ghana made up of the Ghana Institute of Architects, Ghana Institution of Engineers and the Ghana Institution of Surveyors (Quantity Surveying Division) practicing in Ghana for the study. Both primary and secondary data were collected. A descriptive survey was also used to observe and describe the presence, frequency or absence of characteristics of a phenomenon as it naturally occurred, in order to gain additional information. A questionnaire was also designed to collect data from the architects, engineers and quantity surveyors. The data was analyzed using Statistical package for the Social Scientists (SpSS) 17.0. Descriptive and inferential statistics, such as frequency tables, percentages and cross tabulations were used in the data analysis and summaries. Simple tests of associations were undertaken by using Chi square and Cramer’s V statistics to compare relationships between variables. Again, relative importance index was also used to analyze some of the data by computing to deduce their rankings. The relative importance index was used to analyze some of the data by computing to deduce their rankings. The research revealed that majority of consultants had an average knowledge of risk management. Based on the findings it was recommended that consultants undergo advanced training in risk assessment. It was therefore suggested that consultancy firms should develop a set of laid down procedures for consultants to use in risk assessment in order that the use of intuition employed by majority is lessened. The challenges observed in risk assessment and the remedial steps suggested curtailing the detrimental effects of risks would be of wide importance to man

关键词： Construction Industry project Risk Management Assessment Design phase

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Life:Different Colours(4)

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英语学习 1996年第9期 39-40页

作者： maurice Dipple

The mother of mischief,"says an old Scottish proverb,"is no bigger than a midge’s wing."This is why yourmother hopes you won’t go into TV *** just above politics and rodeo clowns on the *** makes you wonder what kin... 详细信息

关键词：电视广告 TV Life:Different Colours

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Hemifacial microsomia:management of the vertical ramus compartment

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plastic and Aesthetic Research 2015年第1期2卷 99-106页

作者： maurice Yves Mommaerts European Face Centre Universitair Ziekenhuis BrusselLaarbeeklaan 1011090 BrusselsBelgium

Hemifacial microsomia and Goldenhar syndrome pose unique challenges to the craniofacial *** *** provides a description of the craniofacial *** the“M”of O.M.E.N.S.(the mandible),the pruzansky-Kaban classification provides therapeutic guidelines for joint and face reconstruction.A sequence of standard procedures,including temporomandibular joint reconstruction,facial rotation surgery,gluteal fat grafting,and patient-specific titanium implantation,each have their *** author provides his expert opinion,acquired over thirty years of experience,with an emphasis on descriptions of and solutions for ten problematic issues.

关键词： Congenital abnormalities goldenhar syndrome mandibular reconstruction

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Lift of cheek and neck:technical notes

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plastic and Aesthetic Research 2015年第1期2卷 301-308页

作者： maurice Yves Mommaerts European Face Centre Universitair Ziekenhuis BrusselLaarbeeklaan 1011090 BrusselsBelgium

INTRODUCTION Because alternatives exist for the full facelift(rhytidectomy),this procedure has become less popular *** the past,forehead wrinkles were addressed with coronal[1,2]and endoscopically assisted forehead lift[3]***,botulinum toxin and hyaluronic acid fillers are used for this purpose because they are more effective and result in less downtime.

关键词： notes Today time.

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