نتایج جستجو برای: mélange
تعداد نتایج: 613 فیلتر نتایج به سال:
Constellation of ipsilateral posterior hip dislocation, intertrochantericand proximal tibial fracture with popliteal artery injury is rare. Management of this presentation is challenging. A motor vehicle accident victim presented with these injuries, but without any initial signs of vascular compromise. Popliteal artery injury was diagnosed intra-operatively and repaired. This was followed by e...
L’estimation conditionnelle itérative (ECI) est une méthode d’estimation itérative des paramètres dans le cas des données incomplètes. Sa mise en œuvre demande des hypothèses relativement faibles et peut être effectuée dans des situations relativement complexes, comme les modèles de Markov triplets. L’objet de cette Note est d’énoncer un théorème général de convergence de l’ECI, et de montrer s...
Lherzolite is one of the main units in the Ab-Bid ultramafic complex from Esfandagheh-HadjiAbad coloured mélange (South of Iran). The complex contains harzburgite, dunite, lherzolite and pyroxenite dykes and the lherzolites mainly occur in the margins. In the field, lherzolites occur as weakly foliated coarse-grained peridotites with shiny pyroxene grains and cut by neumerous pyroxenitic veins....
The Baft ophiolitic mélange, covering an area approximately 150 Km2, is located in the Esfandaghe-Khamrood melange belt. The main part of intrusive rocks in the Baft ophiolitic mélange consists of gabbros, mostly isotropic and occasionally as pegmatitic rocks. Plagiogranites, as veins and small outcrops, are common along with gabbros and doleritic dikes through the area. Plagiogranites consist ...
Baft ophiolite mélange is a part of Naein-Baft ophiolite (southeast of Kerman province in Iran). Serpentinites from Baft ophiolite mélange contain different types of spinels such as chromite, chromespinel, ferritchromite and magnetite which can reveal different stages of evolution in host serpentinites. The compositions of Baft chromites show that they belong to podiform chromitites that may ha...
During the Late Paleozoic to Cenozoic, with closure of Tethys oceans, East and/or Southeast Asia was amalgamated by individual blocks. In order understand Paleogeography Eastern Paleo-Tethys, a systematic UPb dating on 11 samples have conducted constrain age and provenance elements forming Ailaoshan-Song Ma mélange. These consist ophiolitic mélange zone (6 samples), sedimentary cover Indochina ...
Résumé. Très populaire et très efficace pour l’estimation de paramètres d’un modèle de mélange, l’algorithme EM présente l’inconvénient majeur de converger parfois lentement. Son application sur des tableaux de grande taille devient ainsi irréalisable. Afin de remédier à ce problème, plusieurs méthodes ont été proposées. Nous présentons ici le comportement d’une méthode connue, LEM, et d’une va...
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