bluuebunny/crossref_metadata_2025 huggingface dataset:
Migrations et mémoires : les Indo-Malgaches de France et de Madagascar depuis les années 1970
Authors: Gandelot Ludovic
Published: December 2013

Résumé : L'article évoque d'abord l'itinéraire migratoire des Indiens de Madagascar en particulier des musulmans chiites, depuis les années 1970, en insistant sur les différences socio-économiques au sein de cette minorité. A partir de cette période, les migrations qui affectent les Indiens, induisent de profonds changements et des affinités identitaires complexes. Celles-ci sont mobilisées de façon différenciée, en fonction des contextes et des lieux de résidence. L'article tente de comparer ensuite le vécu des communautés indiennes de Madagascar vivant en France à celles restées à Madagascar. La place du souvenir et de la mémoire des origines, tant malgaches que gujaratis, y sont décrites ainsi que les modalités de la transmission de cet héritage. Enfin, y est évoquée l'attraction particulière, que semble jouer plus récemment l'Inde, pour ces communautés aux références culturelles multiples.
Les funérailles des gouverneurs ou l'accession au Panthéon colonial à la fin du XIXe siècle
Authors: Rezzi Nathalie
Published: December 2013

Summary : Like all governments, the Third Republic needed to create its own heroes. Some colonial personalities have been used for colonial propaganda. The funeral is the good time to create the figure of "the" man who is used by the State with monuments like statues.
« Des vassaux à désirer » : les Acadiens et l'Atlantique français
Authors: Hodson Christopher
Published: December 2013

Résumé : Cet article s'intéresse au monde atlantique français à travers les expériences diverses des réfugiés acadiens. Peuplée par des Amérindiens mi'kmaqs et des migrants originaires de la France de l'Ouest et du Centre, la colonie française d'Acadie devint la province britannique de Nouvelle-Ecosse en 17 13. Après deux générations de relations tendues entre ces colons francophones et catholiques et leurs gouvernants protestants, les autorités provinciales lancèrent une campagne militaire en 1755 afin d'arrêter et d'expulser la population acadienne tout entière, soit 15 000 individus. Entre 1755 et les années 1780, les réfugiés acadiens parcoururent le monde atlantique, ayant été d'abord déportés dans les villes de l'empire britannique, puis s'établissant à Saint-Domingue, en Guyane, dans les îles Malouines et même dans les colonies agraires de France métropolitaine. L'article démontre que l'histoire des Acadiens en exil permet de mettre en lumière deux aspects fondamentaux de l'Atlantique français sur lesquels les historiens n'avaient pas encore assez insisté. Il révèle qu'aux lendemains de la guerre de Sept Ans se multiplièrent les projets relatifs à l'empire et à la colonisation, qui exercèrent une grande influence sur la culture politique française. Fait encore plus important, il montre également que lorsqu'on les considère du point de vue des Acadiens, les « Atlantiques » français, britannique et espagnol apparaissent comme étroitement connectés.
La photo de presse et les événements de Nouvelle-Calédonie (1984-1989)
Authors: Illido Prescilla
Published: December 2013

The photographie representations of the New Caledonian Events from 1984 to 1989 in the French metropolitan and Caledonian press (4th actor in the conflict), registered in a System of opposition between pro and independents, sketched the portrait of a violent and racist New-Caledonian, which became the major stake in the French domestic policy. The pictured reproductions of the conflict which was treated more as a civil war than a politic crisis, treated about the local antagonisms, not for them but as a arguments of a power struggle between "left" and "right", RPCR and FLNKS.
La SECACO : la création d'une usine en temps de guerre en Haute-Volta
Authors: Etienne Sissao Claude
Published: December 2013

The article relates the episodes of the setting up of a factory called SECACO (Colonial Fuel Exploitation Company) between 1938 and 1953. In that way, it approaches the aspects of an economy in war time which initially was to produce alternative fuel by transforming a plant known as karite. It is also reflections on the atypical geographical name of a village of Upper Volta, now Burkina Faso.

This text militates in the advantage of the protection of the ruins of the factory as an archeological witness of the first modem industries and also for the preservation utilitarian vegetal specy left by the former generations and the importance of which grows greater as zvell as in the world today and probably in the future.
Pratiques démocratiques au Cameroun actuel : étude comparée avec la période de l'accession à l'indépendance.
Authors: Martin Mbengué Nguimè
Published: December 2013

Résumé : Le présent article vise à relever la contribution stratégique et tactique des deux principaux dirigeants du "Cameroun nouveau" à l'épanouissement politique du peuple camerounais à travers la gestion des exigences démocratiques. Dans un contexte social et économique dynamique, les initiatives politiques d'Ahmadou Ahidjo et celles de Paul Biya assurent, respectivement de 1960 à 1972 et de 1990 à 2010, le triomphe successif de deux responsables du pays. Elles imposent au peuple d'une part la loi dictatoriale aux lendemains de l'accession à l'indépendance, d'autre part la contrainte de maturité politique en vue de l'essor démocratique attendu depuis 1982.

Le constat soulève une curiosité autour de l'application démocratiques des principes aux Cameroun postindépendance. Il exhorte le chercheur à saisir et à cerner les techniques utilisées par chacun des leaders camerounais pour gérer le jeune État pendant plus d'une décennie.

La synthèse intelligible qui résulte d'une telle pression symbolique est originale. Elle émane de l'exploitation de sources rares, parcellaires, complémentaires et des apports de l'observation directe. Elle rappelle l'adoption du multipartisme de principe au Cameroun indépendant de 1960 à 1972, la reconnaissance et la fragilisation des opposants politiques en 1990-2010, le rêve/illusion de l'alternance inaliénable en tant que caractéristique des deux périodes de vie démocratique au Cameroun des années 1960-2010. ; il s'agit d'améliorer l'historiographie de ce pays et celle de l'ensemble de l'Afrique à l'aube du XXIe siècle en comblant un vide scientifique dont l'histoire du Cameroun ne saurait s'accommoder encore longtemps.
Les rapatriés d'Algérie et la presse. Le cas lyonnais.
Authors: André Marc
Published: December 2013

En 1962, un événement surprend les métropolitains : l'arrivée des rapatriés d'Algérie. Un corps étranger pénètre brusquement dans les villes et Lyon n'échappe pas au phénomène, suscitant l'élaboration d'un discours cohérent. Les quotidiens régionaux sont un lieu d'analyse privilégié de ce discours : ils représentent la collectivité dans la mesure où chaque citoyen y a ses repères, ses trajets de lectures. La place prise par les rapatriés dans ces journaux permet de mesurer leur degré d'intégration. Ils vont alors être présents dans la presse de deux manières. Tout d'abord, leur arrivée, en tant qu'événement, est un objet journalistique par la réaction immédiate qu'il suscite. Un certain nombre de groupes structurés - organisations, syndicats, associations, partis ou personnes politiques -, avec leur rhétorique et leurs codes, ont accès aux journaux pour diffuser des messages. Il ressort de cette polyphonie un unanimisme optimiste. Puis, une mise en page de la présence des rapatriés dans la collectivité suppose un journalisme de nature différent. Il convient alors, non de laisser la parole à différents groupes structurés, mais d'élaborer une image de la collectivité lyonnaise avec cette nouvelle présence des rapatriés. La ventilation des rapatriés dans les colonnes du journal représente et facilite l'intégration effective dans la ville de Lyon. Mais celle-ci repose in fine sur une affinité politique entre les élus et les nouveaux « patriotes ».
Les gouverneurs français de 1880 à 1914 : essai de typologie.
Authors: Rezzi Nathalie
Published: December 2013

Nathalie REZZI : Les gouverneurs de 1880 à 1914.

Il s'agit, dans une étude basée sur des recherches effectuées dans le cadre d'une thèse, de brosser le portrait de ce corps de hauts fonctionnaires. Dépositaires du pouvoir central, ces gouverneurs se veulent porteurs des idéaux de la République et ont choisi de la représenter outre-mer. Considérés comme des héros ou symboles de la brutalité coloniale, leur étude prosopographique montre en fait que la République envoie dans ses colonies un personnel qu'elle pourrait placer dans n'importe qu'elle région métropolitaine.

Ce travail se propose donc d'étudier les origines géographiques, sociales, professionnelles et la formation intellectuelle de ces fonctionnaires et de comparer ainsi les différents types de gouverneurs (explorateurs, militaires, administratifs et politiques) et de procéder à une comparaison géographique (envoie-t-on le même type d'hommes en Afrique, en Indochine ou dans les « petites » colonies ?) en particulier au travers des dossiers individuels, source incontournable pour procéder à une étude de ce corps.

Une fois cette étude faite, un second axe consisterait à voir comment ces hommes étaient perçus par leurs administrés. La perception des colons peut être étudiée au travers de la presse (suivre un gouverneur dans ses différents postes et procéder au dépouillement des journaux locaux). Etudier la réaction des populations colonisées est plus difficile : les sources sont a priori des sources européennes et non indigènes mais le dépouillement des archives politiques peut permettre d'envisager la vision indigène de ces représentants du pouvoir colonial.
Naaba Saaga II et Kougri, rois de Ouagadougou : un père et son fils dans la tourmente coloniale puis postcoloniale (1942-1982)
Authors: Beucher Benoît
Published: December 2013

Benoît K. BEUCHER : Les souverains moosé Naaba Sagha II et Kugri : un père et son fils dans la tourmente de la colonisation puis de l'indépendance (1942-1982).

Naaba Sagha II (1942-1957) et Kugri (1957-1983) sont tous deux les héritiers d'une longue dynastie de souverains régnant, depuis le XVIe siècle, sur le royaume de Ouagadougou, la partie centrale du Burkina Faso actuel. Leurs points communs ne s'arrêtent pas là. En effet, le père comme le fils, sont tous deux liés au sort de la France depuis que la métropole s'est attachée le service des souverains à l'occasion de la signature du traité de protectorat sur le « Mossi » en 1897.

Ces deux rois, formés à l'école « du Blanc », ont la tâche de réussir ce jeu d'équilibre entre les intérêts propres à un royaume sans frontière dont ils ont traditionnellement la charge, et ceux de la puissance coloniale, puis, à partir de l'indépendance acquise en 1960, des élites africaines « occidentalisées », en leur qualité de précieux auxiliaires de l'administration.

Toute l'histoire des relations entre ces rois et les nouvelles élites qui leur délèguent une parcelle de leur autorité, pourrait se résumer en une dialectique d'accompagnement ou d'opposition à l'égard du vent du changement que celles-ci font souffler sur la Haute- Volta. Attirance ou répulsion vis-à-vis de la métropole ou des élites que celle-ci a façonnées, divergence ou convergence des points de vue et des projets, sont intimement liés au tempérament ainsi qu'au sens politique d'un père et d'un fils qui ne partagent pas la même vision de l'avenir.

C'est qu'au-delà de ce qui les rassemble, Naaba Sagha II et Kugri - qui n'a pas été élevé à la Cour en vertu de la coutume - n'ont pas le même caractère : si l'un est diplomate et réfléchi, l'autre semble plus impulsif et fougueux. Ils n'appartiennent pas davantage à la même génération, entendons par là que Naaba Sagha II a connu les derniers temps où le souverain était l'unique intermédiaire entre le « roi de la brousse » - l'administrateur colonial - et ses sujets. C'est également lui qui a su préparer son royaume à entrer dans l'ère nouvelle des élections à partir de 1945. Naaba Kugri, quant à lui, est intronisé au moment même où son pays s'apprête à gagner son indépendance, et ne parvient pas à trouver sa place dans le nouvel ordre politique ; la tentative de coup d'Etat dont il est à l'origine en 1958 en est la preuve flagrante, tout comme les difficiles relations entretenues avec les chefs d'État voltaïques qui se sont succédés jusqu'à son décès survenu en 1983.

De ces différences d'approche se trouve conditionnée la transmission d'un État d'inspiration française, et plus largement le choix de ce qui doit être conservé ou oublié de la domination coloniale afin de préparer l'entrée du pays dans le XXIe siècle.
Le Service des beaux-arts, antiquités et monuments historiques, clef de voûte de la politique patrimoniale française au Maroc sous la résidence de Lyautey (1912-1925)
Authors: Théliol Mylène
Published: December 2013

Mylène THELIOL : Le service des Beaux-Arts, des Antiquités et Monuments Historiques, clef de voûte de la politique patrimoniale coloniale française au Maroc sous le mandat du Général Hubert Lyautey (1912-1925).

La nomination en avril 191 2 du Général Lyautey à la tête du protectorat français au Maroc ouvre la voie à la pacification au sein d'un pays révolté depuis la signature du traité de Fès qui instaure la mise sous tutelle du royaume chérifien. Outre une présence militaire accrue, le résident général applique les clauses du traité en respectant et protégeant les infrastructures politiques et les traditions marocaines ainsi que la religion musulmane. Sur le plan culturel, il emploie les mêmes principes. Les architectures et les villes marocaines sont gardées dans leur intégrité tandis que des nouvelles cités françaises se construisent à côté. Afin de garantir la protection des monuments et des médinas, le général Lyautey crée le service des Beaux-Arts, Monuments historiques et Antiquités dont le chef et son adjoint sont deux artistes peintres : Maurice Tranchant de Lunel et Joseph de la Nézière. Entre 1912 et 1925, le service, sous la bienveillance de Lyautey lui-même, a les mains libres pour mettre en œuvre le classement des édifices marocains les plus typiques. Les lois (dahirs) du 26 novembre 1912 et du 17 juin 1914 contribuent à cet inventaire des monuments historiques. Les bâtiments sont alors conservés dans leur état d'origine ou alors restaurés selon des critères et des méthodes oscillant entre les traditions artisanales marocaines et les théories françaises de Viollet le Duc à la fin du dix-neuvième siècle. La conception de Monuments historiques est nouvelle dans un pays musulman. Il convient alors d'en définir la notion française et ensuite d'analyser quels édifices sont ainsi répertoriés. Les modalités et les techniques employées pour la conservation et la restauration des édifices sont aussi les deux autres thèmes majeurs à étudier. Les architectures des quatre villes impériales (Fès, Marrakech, Meknès et Rabat-Salé) sont prises comme exemple car celles-ci ont été les plus touchées par ce programme patrimonial colonial.
Les trois batailles aux Indes d'André-Antoine de Serquigny comte d'Aché (avril et août 1758-septembre 1759)
Authors: Hartmann Claude
Published: December 2013

Résumé : Le 3 mai 1757, l'escadre commandée par André-Antoine de Serquigny comte d'Aché quitte le port de Lorient pour secourir les établissements français de l'Inde, menacés par les Anglais. Elle affrontera les vaisseaux de la Navy au cours de trois batailles indécises. La troisième, le 10 septembre I759 au large de Pondichéry aurait pu lui donner un avantage décisif. Mais, encore une fois, malgré l'intervention d'un jeune officier, Jean-Louis-Thomas Heurtault de Lamerville, les Français rompent le combat. Le 27 septembre, d'Aché, une fois de plus, laisse échapper l'occasion d'accrocher la flotte anglaise. Les 27 et 28 janvier 1760, un cyclone sur l'île de France jette 32 bâtiments à la côte. A la suite de ce désastre, d'Aché laisse le commandement à M. de l'Éguille et rentre en France, scellant ainsi la perte de Pondichéry, ajoutant de ce fait un échec cuisant à la longue liste des revers de la Guerre de Sept-ans.
Bald Eagle Nesting Habitats in the Upper Mississippi River National Wildlife and Fish Refuge
Authors: Mundahl Neal D. , Bilyeu Anthony G. , Maas Lisa
Published: December 2013

This study examined habitat variables associated with 53 active bald eagle Haliaeetus leucocephalus nest sites in the Winona District of the Upper Mississippi River National Wildlife and Fish Refuge, Minnesota and Wisconsin. The Refuge is the most heavily visited refuge in the United States, where breeding eagle populations have been increasing dramatically. During February–April 2009, nest trees were identified and measured, nest heights were determined, distances to nearest water bodies were assessed, and forest inventories were conducted for the standing timber surrounding the nest trees. Nest densities and spacing were assessed within each navigation pool, and land cover types were examined within 100- and 1,000-m radii around known eagle nest sites and random points within the Refuge. Ninety-three percent of nest sites had supercanopy eastern cottonwoods Populus deltoides and silver maples Acer saccharinum as the nest trees. Potential human disturbances from highways, railroads, and commercial barge and recreational boat traffic were present within 400 m of 90% of known nest sites. Eagle nest sites were located an average of 1.52 km from the next nearest nest, with nest densities ranging from 0.32 to 9.72 nests/100 km2 among the four navigation pools of the Winona District. Land cover types around known nest sites and random points differed significantly at both 100- and 1,000 m scales, with wet forest and open water significantly more abundant and agricultural and developed lands significantly less abundant than around randomly selected points. Successful nests that fledged at least one young were spaced significantly further away from other active nests and were located in areas with lower tree density than were unsuccessful nests. Floodplain-nesting bald eagles tended to select the tallest, dominant trees for nest sites, placing nests near the height of the surrounding canopy. Human presence within the Refuge does not appear to be limiting the expansion of nesting bald eagles in this riverine habitat.
Difference between Two Seismic Response Analysis Programs for Soft Site
Authors: Yu Xiao Bo , Sun Rui
Published: December 2013

In the process of seismic safety evaluation, engineers need ground motion parameters which may be obtained from different programs. For exploring the difference caused by different programs, 4 horizontal layer models of construction sites are established, and 3 earthquake waves are inputted. Results between SHAKE2000 and LSSRLI-1 indicate that there exists evident difference when the groundsill is weak. Soil profiles, inputting earthquake waves, and amplitude influence on the error of the programs. In the process of seismic safety evaluation engineers should take care of the error caused by using different programs. The error also demonstrates that equivalent linearization method have upgrade potential internally.
A Novel Structural Form of Semi-Submersible Platform for a Floating Offshore Wind Turbine with Hydrodynamic Performance Analysis
Authors: Lai Bin Bin , Zhao Cheng Bi , Chen Xiao Ming , Tang You Hong , Lin Wei
Published: December 2013

With the mature of floating offshore wind turbine technology, floating wind farm building in the deep sea becomes an inevitable trend. In the design of floating offshore wind turbine, the change of structural form is the main factor influencing hydrodynamic performance. This research, taking a typical sea condition in China's coastal areas as the object of study, designs a novel semi-submersible foundation for NREL 5 MW offshore wind turbine in 200 m deep water. In the design, deep-draft buoys structures are used to reduce the force of waves on the floating offshore, while damping structures are used to optimize the stability of wind turbine and reduce the heave amplitude. By means of numerical simulation method, the hydrodynamic performance of semi-submersible support is studied. Meanwhile, the response amplitude operators (RAOs) and the wave response motions of platform are calculated. The results in time domain indicate that the floating wind turbine system can keep safe and survive in the harsh sea condition, coupling wind, waves and currents. It is showed that the designed semi-submersible support of platform has excellent hydrodynamic performance. This change of structural form may serve as a reference on the development of offshore wind floating platform.
Study on Architectural Design for Indoor Space of Small Area House
Authors: Du Fei Long , Li Tao
Published: December 2013

Based on the characters of interior space in small area houses, this paper gives summarization of the typical design strategy of indoor dwelling unit type design. It makes study on different households requirements and the main design problem in small apartment.
Brief Analysis of Settlement Patterns in Taiyuan County in Ming Dynasty
Authors: Zheng Jie , Wang Jin Ping
Published: December 2013

Ming Taiyuan County ,as the main component of Jinyang City relics, is the bond of cultural evolution from ancient to modern times. The ancient county pattern still exists from which can clearly see overall appearance of culture development in the Taiyuan area after the Ming and Qing Dynasties. It is of great significance for the study of the history of Ming and Qing Dynasty in Taiyuan area. This paper analyzes the historical background, settlement patterns, layout of streets and lanes of the Ming Taiyuan County, and summarizes the characteristics of the value of ancient town.
Polymerization and Chiroptical Behavior of N-[o-(4-isopropyl-4,5-dihydro-1,3-oxazol-2-yl) phenyl] Methacrylamide
Authors: Fu Zheng , Wei Hong , Ding Yang , Yuan Chao
Published: December 2013

The radical polymerization of optically active methacrylamide derivative, N-[o-(4-isopropyl-4,5-dihydro -1,3-oxazol-2-yl)phenyl] methacrylamide ((S)-MeOPMAM), was carried out under various conditions. The effect of Lewis acid, that is, rare earth metal trifluoromethanesulfonates on the free-radical polymerization were examined under different solvents. The polymerization in the presence of rare earth metal trifluoromethanesulfonates produced isotactic-rich polymers compared with those obtained without the Lewis acid. The polymerization characteristics and the chiroptical behavior of the resultant polymers have been examined by using circular dichroism (CD), UV–Vis, and NMR spectroscopies.
Preparation of a Net with the Function of Sand-Resistance and Sand-Fixation
Authors: Wang Hai Wang , Cheng Mei Ling , Zhu Ying , Wei Xin Fang
Published: December 2013

When the railway pass through the desert and highlands, it is often corroded and buried by the sand. So it is necessary to spread out nylon material sand-fixation net along with the railway for windbreak and sand-fixation. The using of the refractory nylon net is restricted because it is difficult to be degraded. Nowadays, much attention has been paid to the desertification. To mitigate the effects of desertification, it is imperative to research for a new type of sand-fixation material. Here, we deal fiber-linen with advanced surface treatment technology to make a new kind of material which can be degraded. It is not only environmental-friendly and advanced but also very cheap, Whats more, it has the excellent abilities of ageing resistance, water resistance, and UV resistance.
Synthesis of Monodispersed Lauric Acid Capped Silver Nanoparticles by Wet-Chemical Reduction Method
Authors: Dong Chun Fa , Zhang Xiang Lin , Cao Chuan Liang , Cai Hao
Published: December 2013

Silver nanoparticles with narrow distribution were prepared by a simple route in water in presence of lauric acid as the capping agents. The morphology and crystal structure of as-synthesized silver nanoparticles were analyzed by transmission electron microscopy (TEM) and X-ray powder diffraction (XRD). The mass ratio of lauric acid and silver nitrate, the reaction temperature play important roles on the morphology and size of the silver nanoparticles. Well-dispersed silver nanopartilces with diameter of 8 nm were obtained when the mass ratio of lauric acid and silver nitrate was 1.2:1 and the reaction temperature was room temperature. It is also confirmed that the sol system was monodisperse nanosilver sol.
Influence of Ti to the Microstructure and Mechanical Properties of Al-12Si-3.2Cu-1Mg-2.4Ni Piston Alloy
Authors: Zhou Ling Zhan , Peng Yin Jiang , Zhu Xiu Rong , Zhang Guang Ming , Yang Li Ming , Shi Hong Xia
Published: December 2013

Al-12Si-3.2Cu-1Mg-2.4Ni-χTi (χ=0, 0.2) alloys were prepared by squeeze casting process, and then heat-treated. The mechanical properties were tested at 350°C, the microstructure and phases in them were investigated by optical microscope, SEM, EDS and XRD. It is found that the grain size has an obvious increment after 0.2 wt. % Ti additions to Al-12Si-3.2Cu-1Mg-2.4Ni, and the ultimate tensile strength at elevated-temperature increased accordingly. Intermetallic compounds, such as γ-Al7Cu4Ni, M-Mg2Si, Q-Al5Cu2Mg8Si6 and δ-Al3CuNi existing in alloys with and without Ti addition. Needle-like Ti containing phase with the elements of Al, Si and Ti created in Al-12Si-3.2Cu-1Mg-2.4Ni-0.2Ti alloy, and the eutectic Si is found to distribute by the side of Ti containing phase.
The Effect of Initial Microstructure on the Dynamic Mechanical Behavior of Titanium Plate at Different Strain Rates
Authors: Li Mian , Li Bo Long , Wang Tong Bo , Nie Zuo Ren
Published: December 2013

The dynamic mechanical property and microstructure evolution of commercial pure titanium with initial lamellar dislocation boundary structures were studied at different strain rate compression. The experiments were conducted to the cylindrical specimens using Gleeble-3500 thermal mechanical simulation machine at room temperature. With increasing of the strain rate, strain rate strengthening effect was found in the material. New dislocation boundary structures along impact direction were generated which perpendicular to initial dislocation boundary. Then the S bands boundary structure was formed by interaction between new and initial dislocations. It can be supposed that initial dislocation boundary are sheared and kinked by new dislocation slipping.
Pressure-Induced Tunable Magnetism and Half-Metallic Stability in Co2FeGa Heusler Alloy
Authors: Gao Qin Xiang
Published: December 2013

Using the first-principles calculations within the density functional theory (DFT), we have investigated the structure, magnetism and half-metallic stability of Co2FeGa Heusler compound under pressure from 0 to 50GPa. The results revel that the lattice constant is gradually shrank and total magnetic moment in per unit slightly decreased with increasing pressure, respectively. Moreover, with the increase of the pressure, the Fermi level will move towards high-energy orientation. When the pressure reaches at 30GPa the most stable half-metallicity is observed which the Fermi level is located at the middle of the spin-minority gap.
The Study on Properties of Soluble Alumina Based Ceramic Cores
Authors: Jia Zhi Hong , Wang Shun Cheng , Ma Ming Zhe , Xu Liang , Zhao Yu Tao , Ma De Xin , Zhu Xiang
Published: December 2013

The effect of the sintering temperature, quartz and sodium phosphate content on the core strength,shrinking percentage and solubility of alumina matrix ceramic cores was investigated．The results show that：the more the quartz is, the higher of the bending, tensile strength at room temperature of core are;It has the extreme point when quartz is 10wt%, then decreases slightly.The shrinkage rate and the room temperature strength of core increases with the rising of sintering temperature,but decreases with the increasing of content of sodium phosphate. Furthermore, the effect of the sintering temperature,quartz powder and sodium phosphate content on solubility of core was discussed.
Development of the Reliable Fluorometric Assay for the Sensitive Determination of Nitric Oxide Metabolites in Biological Fluids
Authors: Yang Qiao , Zhang Xiao Ling , Huang Hong Liang
Published: December 2013

In this study, we developed a fluorescence measurements in microplates for high-throughput determination of nitric oxide (NO) metabolites, which is used as a reliable and sensitive marker of NO production, in biological fluids using a pH-independent fluorescence increasing probe, DAMBO-PH. The sensitivity of this method is lower than that of the other detection methods reported in the literature. This method was demonstrated to be useful for the rapid screening of large numbers of biological and clinical samples, and should be an important tool for further clarifying the physiology, pathology and pharmacology roles of NO.
Influence of Plasma Treatment on Size Adhesion Strength to Raw Cotton Yarns
Authors: Sun Shi Yuan , Fu Chun Hong , Wei Xiao Ying
Published: December 2013

This study systematically investigated how helium and oxygen (He/O2) atmospheric pressure plasma jet (APPJ) treatment influences the size adhesion strength (SAS) to the cotton yarn. Results show that the SAS increases with the treatment time from 0 to 18 s then decreases until 24s. The SAS has a decreasing trend when the jet to sample distance (JTSD) goes up from 1.5 to 6.0 mm and it increases with the rising of O2 flux from 0.1 to 0.3 L/min then decreases until 0.45 L/min. For samples with different moisture regains (MRs) of 0.5%, 9.3% and 26.3%, the SAS decreases as the MR rises up. SEM and XPS analyses show that APPJ treated samples have roughened surfaces and are introduced polar bonds such as COH, C=O and OC=O. Cotton fibers with lower MRs are more efficiently etched and more polar bonds are imparted by the APPJ treatment.
Study on the Abrasive Wear of Ceramic Piston Rings and the Different Cylinder Bore
Authors: Gao Wen Wei , Zheng Zhi , An Ya Qin , He Song Bai
Published: December 2013

The paper takes the SRV friction and wear tester, conducts the research on the abrasive ability of the three tribomate pairs (ceramic piston ring and P-B, Cu-Cr-Ni-Mo and bainite cylinder bores) under the condition that there lies a certain amount of quartz sand in the lubricant and find that the more hardness of cylinder bores, the more capability of resisting abrasion. The capability of resisting abrasion of ceramic piston ring/bainite cylinder bores is the best in three tribomate pairs.
Copper from Copper Smelting Slag by Oxidation Leaching
Authors: Chen Mao Sheng , Zhu Xin Ming , Han Zi Rong , Ning Ping , Ma Yi Xing
Published: December 2013

In this paper, copper was recovered from copper smelting slag by oxidation-ammonia leaching under normal pressure. Ammonia persulfate was employed as oxidizing agent and ammonia as complexing. The results showed that the optimal parameters were as following: the mass ratio of liquid and solid was 4:1, the temperature was 35°C, the leaching time was 180 minutes, the amount of (NH4)2S2O8 was 0.4 times of the slag sample, the ammonia concentration was 11mol/L. Under the optimal conditions, recovery of copper was 81.7%.
Numerical Research on Implosion of Condensed Liners Used in Study of Shock Adiabat of Materials
Authors: Wang Gang Hua , Kan Ming Xian , Zhao Hai Long
Published: December 2013

Research on material properties under extreme conditions plays a great role in material science and high energy physics. Condensed liner accelerated by powerful pulse facilities has been used to compress the target liner. The motion of liner implosion driven by a pulse of current of several microseconds rise time and 70~90 MA has been numerically studied in this paper. Liners state and velocities are discussed. Results of 2D magnetohydrodynamics liner implosion computations are presented in order to study the development of interface instability.
Preparation of Ceria from Bastnaesite with NaHCO3 as Fluoride Retention Additive
Authors: Zhong Hui , Qiu Ke Hui , Qiu Yu Chong , Li Yu Tao , Fu Ning Jia
Published: December 2013

The CeO2 is prepared directly from bastnaesite as raw material that originated in Dechang, Sichuan province, China. Fully mixed with sodium bicarbonate (NaHCO3) and roasted at 550 °C, the rare earth element (REE) in bastnaesite transformed into rare earth oxide. And the CeO2 will be obtained by removing NaF through water washing and leaching the impurity elements including La, Fe, Al, Ca, etc. via hydrochloric acid (HCl). The CeO2 was characterized by X-ray diffraction (XRD) and X-ray fluorescence (XRF). The XRF results demonstrated that the content of CeO2 could reach more than 70% in products which can be used as polishing material.
The SVC Based AFOSM Method for the Structure Reliability Sensitivity Analysis
Authors: Chen Wei Dong , Jia Ping , Wu Xian De , Yu Yan Chun , Zhang Feng Chao , Lu Sheng Zhuo
Published: December 2013

The limit state function (LSF) is implicit to many structure reliability analysis problems, which may make some classical reliability method complicated to be applied. One of the surrogate methods-support vector classification (SVC) was applied in the structural reliability analysis herein which has not been applied to structure reliability analysis until recent years. Then the advanced first order second moment method (AFOSM) can be applied. The expressions of structure system reliability sensitivity to basic variable were deduced. The flow of how to call the SVC program was presented. An example was shown to compare the SVC based method with some other classical reliability analysis methods. The results are accurately accepted and the advantages of SVC are analyzed.
Research on Hexahedral and Tetrahedral Mesh Applied to Strength Analysis of Bogie Frame
Authors: Li Guang Jun , Wang Wen Jing , An Li , Zhang Ze Jin
Published: December 2013

The structure of bogie frame is meshed by hexahedral and tetrahedral elements respectively. FE analysis is taken based on the loads defined by JIS E 4207 standard and the stress distributions of two separate models are obtained. To clarify the accuracy of two kinds of finite element models, the bench test of the bogie frame is carried out. It shows that both the hexahedral and tetrahedral models are valid according to the comparison between FE results and experimental values when the structural model is regular. However, for complex structure model 10-node tetrahedral model takes precedence.
A Windowed Range Migration Imaging Algorithm for Ground Penetrating Radar Applications
Authors: Lei Wen Tai , Shi Yu Jia
Published: December 2013

The article proposes a new imaging method for ground penetrating radar (GPR) nondestructive testing (DET). Traditional GPR range migration (RM) imaging algorithm regards all the data in GPR echo data as equally important. This assumption is always not in consistent with real GPR detection scenario and usually cannot obtain high quality imaging results. To improve the quality of GPR imaging results, a new windowed RM imaging algorithm is presented in this paper. The radar profile is processed by one-dimensional windowed Fourier transform. The central point of window function is determined by maximum intensity technique. By using windowed RM imaging algorithm, the clutter of GPR profile is suppressed and the imaging results quality is improved. The simulation of this algorithm is processed and experimental results validate the feasibility of this algorithm.
Investigation of the Predictive Ability of Two Advection Schemes on the Formation of a Turbulent Separation Bubble in a Boundary Layer Wind Tunnel
Authors: De Queiroz Matheus , De Vasconcellos Guilherme Loyola França , Maia Cristiana Brasil , Weiss Julien , De Morais Hanriot Sérgio
Published: December 2013

This paper presents a study that correlates the capacity of two advection schemes in foreseeing flow separation inside a boundary layer wind tunnel (BLWT herein after). The geometry of the BLWT forces the generation of a turbulent separation bubble. Numerical simulations were carried out with the commercial Computational Fluid Dynamics software ANSYS-CFX®. The high-resolution advection scheme is shown to be more appropriate than the upwind scheme in predicting flows where properties are subject to strong gradients, such as pressure and velocity.
Investigation of CFD Method Simulating Hydrodynamic Performance of AUV with Complicated Shape
Authors: Wang Ya Xing , Pang Yong Jie , Gao Ting , Wang Jian
Published: December 2013

Analyze veracity and computing efficiency of direct route drag of axis symmetry revolution body with 2D Computer Fluid Dynamic (CFD) method by comparing to the experiment data, discuss affection of different wall boundary functions to the results when calculating Automatic Underwater Vehicles (AUVs) hydrodynamic performance in CFD method. Find out characters of several meshing strategies when spring-based smooth dynamic model is adopted. Method with ball domain inside, which can simulate all the PMM tests and get reasonable outcome, turned out to be the best choice.
Simulation Study of Three-Phase Flow Field Based on Microbubble Flotation
Authors: He Wei , Li Zhe Kun , Tang Ai Rong , Liu An , He Bang Gui
Published: December 2013

Analyzed the research status of flotation separation in the field of water treatment. By using CFD software, the important parameters of velocity and pressure in the flotation column are analyzed and contrasted. Through the simulation, it will identify design adequacy and optimize operating parameters and structural parameters. The important factors influencing floatation column separation are got. In the process of oil-water separation, keeping proper bubble size and gas holdup is necessary.
Computational Fluid Dynamic of Date Transfer
Authors: Lu Bao Yan , Li Yan Zhou
Published: December 2013

A high-speed craft in the supersonic speed, ambient temperature and pressure would affect its structure, heat flow fluid-solid coupling simulation can quantify the effect. Due to physical fields had different heat flow fluid-solid coupling simulation, the data transmission was needed when the fluid dynamics to calculate the quantities of the import structure field. This paper given the derivation process and method of the physical fields data transfer, fluid dynamics to calculate the data in the simulation of structure field was implemented and to quantify the temperature field and stress field impacted on structure field.
Evaluation of the Higher Order Terms of the Wedge-Splitting Specimen Based on the SBFEM
Authors: Xu Feng Lin , Liu Jun Yu , Ning Bao Kuan , Fan He
Published: December 2013

The scaled boundary finite element method (abbr. SBFEM) is a semi-analytical method developed by Wolf and Song. The analytical advantage of the solution in the radial direction allows SBFEM converge to the Williams expansion. The coefficients of the Williams expansion, including the stress intensity factor, the T-stress, and higher order terms can be calculated directly without further processing. In the paper the coefficients of higher order terms of the crack tip asymptotic field of typical wedge splitting specimens with two different loading arrangements are evaluated using SBFEM. Numerical results show the method has high accuracy and effectiveness. The results have certain significance on determining crack stability of the wedge-splitting specimen.
The Mathematical Model of Crane Hoisting Mechanism
Authors: He Wei , Li Zhe Kun , Wang Zhen Yu , Liu An
Published: December 2013

Established the mathematical model of hoisting mechanism based on the theory of vibration, through experimental and theoretical method obtained system stiffness coefficient, damping coefficient, finally calculated reel resistance torque. According to the mathematical model, the hoisting mechanism is simulated and analyzed by using virtual prototype technology, it provide a theoretical basis for design of non-contact type weighing sensor.
The Research on Oblique Crack Tip Deformation Field of Airship Envelope Composites Based on the Digital Speckle Correlation Method
Authors: Liu Long Bin , Gu Yun Chao , Cao Shuai , Xiao Hou Di
Published: December 2013

The tearing mechanical properties and the deformation field distribution of 45 degree oblique direction of the crack tip was studied on the stratospheric airship envelope reinforced by plain woven Kevlar-fiber composite. Here, the material samples were prefabricated with the initial length of 20mm unilateral incision, and the digital speckle correlation experimental method was used to obtain the perpendicular crack tip displacement and strain fields with artificial spots under mono-axial tear test. The results show the deformation field changes with the characteristic of discrete step and the strain concentration phenomenon, and the strain concentration zone expands as increasing tensile load. The warp and weft step maximum displacement reaches 6.00mm and 1.7mm, and deformation in every step exhibits a diminishing step law, the warp deformation in the rear area of the crack tip are evenly, while the shear and weft strain volatile in a wide range
Kinematics Analysis of Morse CVT Input Mechanism
Authors: Chen Qin Hong , Sun Dong Ming , Zhao De Hua , Kang Gui Rong , Sun Jian
Published: December 2013

Kinematics simulation study on Morse CVT input mechanism was established by using simulation software Adams, and it can get curves of displacement, velocity and acceleration of input mechanism of each bar to research its movement characteristics. This method is suit for kinematics simulation of connecting rod mechanism, meanwhile it can modify corresponding simulation parameter and is easy to do optimal design.
Numerical and Experimental Buckling and Post - Buckling Analysis of Composite Cylindrical Panel with Delamination
Authors: Barski Marek , Muc Aleksander , Pastuszak Przemysław , Bondyra Agnieszka
Published: December 2013

The present work is devoted to the analysis of a buckling behavior of a cylindrical composite panel. The considered structure is subjected to the uniform axial compression. The wall of the panel consists of the 8 layers. In addition, in the geometrical center of the structure there is a square delamination located between the fourth and the fifth layer. The main goal is to determine the buckling and post - buckling behavior as well as the influence of the delamination on the stability of the structure. The nonlinear numerical analysis is carried out with aid of the FEM method. The experimental verification is also performed. The results obtained from numerical and experimental analysis show very similar behavior of the structure.
Solar-Powered Wireless Sensor Network’s Energy Gathering Technology
Authors: Ma De Xin , Ma Jian , Xu Peng Min , Song Cai Xia , Pang Ying
Published: December 2013

We analyze the solar-powered wireless sensor network's energy gathering techniques, aiming to prolong the lifetime of wireless sensor network. We summarize wireless sensor network node's energy autonomy system, its characteristics in detail and new technology adopts, provides some suggestions and new ideas in the design and research of solar-powered wireless sensor networks.
A Method for the Assessment of the Inhalation Dose Exposure to Radionuclides in an Indoor Environment
Authors: Hu Xiao Feng , Huang Hong , Shen Shi Fei , Yuan Hong Yong
Published: December 2013

The radionuclides released from NPPs (Nuclear Power Plants) as a result of accidents will significantly affect human health by causing cancer, genetic diseases, or acute radiation sickness. To investigate and evaluate the influence of the airborne hazardous materials on human bodies in an indoor environment in urban areas near NPPs, it is necessary to calculate the inhalation dose. In this study, a method for the assessment of the inhalation dose of indoor radionuclides was proposed. This method consists of the combination of the basic equation of natural ventilation and the empirical equation for calculation of the inhalation dose. The method was applied in a modeled densely urban domain, and CFD simulations were conducted to obtain the wind pressure distribution on the building surfaces. Moreover, the impacts of certain important parameters, including the ventilation coefficient, the age group of humans, the wind velocity, the urban street width, and the building height, were discussed in this paper. The results show that all of these parameters affect the indoor inhalation dose. In most cases, the indoor dose obtained at the same floor was higher with a higher ventilation coefficient, breathing rate, wind velocity, and street width or a lower building height. Furthermore, people living in the middle floors will generally be exposed to a lower inhalation dose than those in other floors especially the top floor.
Experimental Study on Influence of Seasonally Frozen Ground on Horizontal Frost-Heave Force of Frozen Wall
Authors: Yu Hao Lin , Zhang Yi , Wang Wei , Xu Xu Yan , Zhang Chen Xi
Published: December 2013

To investigate the influence of seasonally frozen ground on frost-heave force of artificial frozen wall, 6 artificial frozen wall model tests were performed with different temperature of seasonally frozen ground on developed test platform. Experimental data indicate that compared with the final horizontal frost-heave force of artificial frozen wall without seasonally frozen ground, it increased 8.6% and 9.1% with-3°C and-12°C seasonally frozen ground layer, separately, and it shows that there is an important influence of seasonally frozen ground on the horizontal frost-heave force of artificial frozen wall. It also can be concluded that the lower the temperature of seasonally frozen ground is, the less the freezing time is and the bigger the final horizontal frost-heave force is, but, among all the model tests, the freezing time that is taken to get a stable state is the most for the artificial frozen wall without seasonally frozen ground , and its the final horizontal frost-heave force is the smallest.
Effect of Different Organic Matter Content on Soil Moisture Dynamics
Authors: Ding Yao , Huang He , Wang Lei , Zhang Zhao Qi , Zhang Wei Hua
Published: December 2013

Organic matter plays an important role in soil moisture variation. In order to know the effect of organic matter on soil moisture dynamics, this study compared the infiltration and evaporation of soils with different organic matter content. The results showed that increasing the organic matter content in a certain degree can suppress evaporation and infiltration of soil moisture, and hence improving water use efficiency. When the organic matter content reaches3.2%, effect of suppressing evaporation is most obvious.
Meso-Mechanical Simulation of Fracture Grouting under Fluid-Solid Coupling Environment and Engineering Applications
Authors: Sun Feng , Pan Rong , Zhu Xiu Yun , Chen Tie Lin
Published: December 2013

Due to the complication of grouting process in soil, design of fracture grouting works is still mainly based on empirical considerations and experiences from past projects. Based on the theory of particle flow, the domain of flow is defined by using Fish language implemented in PFC and the formulas for flow and pressure are put forward respectively. Combined with above study, the process of fracture grouting in soil is simulated with particle flow code (PFC2D) from micro-viewpoint under coupling environment. In addition, the emergence and development of crack and grouting pressure in soil is analyzed under different grouting pressure and soil properties. The research results show that pressure plays a key role in consolidating the soil by fracture grouting, but in fact it should be kept in a reasonable value in order to forming grouting slurry net entirely. Filed test indicates that fracture grouting greatly increases the bearing capacity of weathered rock in Xiamen Xiangan subsea tunneling and the conclusions of numerical simulation agrees well with the field test and grouting theory.