Academic literature on the topic 'Engins blindés'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Engins blindés.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "Engins blindés"
1
Alicki, Robert, David Gelbwaser-Klimovsky, and Alejandro Jenkins. "The Problem of Engines in Statistical Physics." Entropy 23, no. 8 (August 22, 2021): 1095. http://dx.doi.org/10.3390/e23081095.
Full textAbstract:
Engines are open systems that can generate work cyclically at the expense of an external disequilibrium. They are ubiquitous in nature and technology, but the course of mathematical physics over the last 300 years has tended to make their dynamics in time a theoretical blind spot. This has hampered the usefulness of statistical mechanics applied to active systems, including living matter. We argue that recent advances in the theory of open quantum systems, coupled with renewed interest in understanding how active forces result from positive feedback between different macroscopic degrees of freedom in the presence of dissipation, point to a more realistic description of autonomous engines. We propose a general conceptualization of an engine that helps clarify the distinction between its heat and work outputs. Based on this, we show how the external loading force and the thermal noise may be incorporated into the relevant equations of motion. This modifies the usual Fokker–Planck and Langevin equations, offering a thermodynamically complete formulation of the irreversible dynamics of simple oscillating and rotating engines.
2
Gao, Jun Wen, Yan Ming Quan, and Yong Man Lin. "The Identification of Engine Noise Source Based on Simulink Blind Sources Separation." Advanced Materials Research 328-330 (September 2011): 2134–39. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.2134.
Full textAbstract:
AC algorithm of blind sources has been applied to the identification of engine noise sources. However, the testing platform based on the blind separation theory is difficult to actualize some experiments and obtain data in the real environment, or to obtain these requires high cost. Therefore, this paper proposes a new approach to construct an experimental testing platform-Sinmulink Model so as to identify engine surface noise sources. This model is applied to the test of the experimental data. These experiments demonstrate that Simulink model is efficient to identify engine noise source and the testing data accord with that made by the former platform. It is obvious that Simulink model, to some degree, can be used to replace engine surface noise sources testing platform.
3
Pelucchi, Mauro, Giuseppe Psaila, and Maurizio Toccu. "Hadoop vs. Spark: Impact on Performance of the Hammer Query Engine for Open Data Corpora." Algorithms 11, no. 12 (December 17, 2018): 209. http://dx.doi.org/10.3390/a11120209.
Full textAbstract:
The Hammer prototype is a query engine for corpora of Open Data that provides users with the concept of blind querying. Since data sets published on Open Data portals are heterogeneous, users wishing to find out interesting data sets are blind: queries cannot be fully specified, as in the case of databases. Consequently, the query engine is responsible for rewriting and adapting the blind query to the actual data sets, by exploiting lexical and semantic similarity. The effectiveness of this approach was discussed in our previous works. In this paper, we report our experience in developing the query engine. In fact, in the very first version of the prototype, we realized that the implementation of the retrieval technique was too slow, even though corpora contained only a few thousands of data sets. We decided to adopt the Map-Reduce paradigm, in order to parallelize the query engine and improve performances. We passed through several versions of the query engine, either based on the Hadoop framework or on the Spark framework. Hadoop and Spark are two very popular frameworks for writing and executing parallel algorithms based on the Map-Reduce paradigm. In this paper, we present our study about the impact of adopting the Map-Reduce approach and its two most famous frameworks to parallelize the Hammer query engine; we discuss various implementations of the query engine, either obtained without significantly rewriting the algorithm or obtained by completely rewriting the algorithm by exploiting high level abstractions provided by Spark. The experimental campaign we performed shows the benefits provided by each studied solution, with the perspective of moving toward Big Data in the future. The lessons we learned are collected and synthesized into behavioral guidelines for developers approaching the problem of parallelizing algorithms by means of Map-Reduce frameworks.
4
Zhang, Yong Xiang, Bo Liang, Jun Li, and Wei Ke. "Blind Source Separation for Impact Force Induced by Piston Slaps in Diesel Engines." Advanced Materials Research 681 (April 2013): 93–98. http://dx.doi.org/10.4028/www.scientific.net/amr.681.93.
Full textAbstract:
The diesel engine vibration induced by piston impact force (also known as slaps) presents us very important information about piston-and-cylinder clearance and engine performance. However it is notorious difficult formaking an accurate measurement for the piston slaps due to the enormous interferences, reverberation, and complicated vibration responses. This paper presents an application of blind source separation technique to solve the problem. The method is based on one novel algorithm which uses blind source de-convolution algorithm. It can overcome the conventional blind source separation calculation drawbacks like local minimization value problems occurred with the fixed step response algorithm.The simulation and experiment results have indicated it can recover the corrupted signals and obtain the accurate piston slap signals at the measurement point.
5
Meric-Bernstam, F., M. Walji, D. Sagaram, S. Sagaram, C. W. Johnson, and E. V. Bernstam. "Conventional cautions regarding online information: Do they predict accuracy of breast cancer websites?" Journal of Clinical Oncology 24, no. 18_suppl (June 20, 2006): 6086. http://dx.doi.org/10.1200/jco.2006.24.18_suppl.6086.
Full textAbstract:
6086 Introduction: Cancer patients and oncologists are increasingly using the Internet. Online information is affecting patient decisions regarding treatment. Therefore, multiple organizations published advice on how to screen out problematic information online. In the present study, we sought to determine whether existing quality assessment tools can screen out false or inaccurate breast cancer information online. Methods: Using 15 representative search queries on five popular search engines and only the first page of results, we generated a list of 1,585 Web pages. After eliminating irrelevant, broken and duplicate links 343 unique web pages were downloaded and evaluated for website characteristics, information accuracy and 15 quality criteria: authorship identified, author credentials identified, physician credentials stated, author affiliation stated, sources clear, general disclosures, attribution/references provided, disclosure of ownership, date created displayed, date of last update displayed, date of creation or last updated displayed, editorial process stated, internal search engine present, feedback mechanism provided and copyright notice. Quality criteria were evaluated by an independent evaluator blinded to the accuracy information. Accuracy was determined independently by a pair of clinically trained evaluators. Results: Of 343 pages evaluated, 41 false/misleading statements were displayed on 18 distinct pages. The presence of an internal search engine was correlated most strongly (r = .196, r2 = .038) with health information accuracy. However, all quality criteria (alone or in combinations tested exhaustively) were linearly associated with less than 7% of the variance in number of inaccuracies per website. Conclusion: Currently available technical quality criteria do not identify false or misleading online information about breast cancer. At this time, directing patients to websites with known content appears to be the only way to ensure patients will not encounter false or misleading online information. No significant financial relationships to disclose.
6
Rzeszutek, Leszek, and Grzegorz Kaczmarek. "Cooled Turbine Cantilevered Nozzle Mounting and Sealing System." Journal of KONES 26, no. 3 (September 1, 2019): 197–202. http://dx.doi.org/10.2478/kones-2019-0073.
Full textAbstract:
Abstract Small advanced turboprop and turboshaft engines, with two-stage high-pressure turbine (HPT), need to meet several challenges. Described herein is an exemplary solution adopted for a cantilevered HPT nozzle mounting and sealing system that helped to meet requirements for size constraint and sealing of split lines and mounting features. Since clearances do not scale down with engine size due to manufacturing tolerances, there is a very limited space available between first and second stage rotors to secure HPT nozzle and to provide means of cooling air supply. Due to small diameters, cavities and size of the parts and assembly access becomes very difficult and precluded the use of typical solutions – like supply air spooilers – known from bigger engines. Relatively larger clearances require also efficient solution for sealing leakage, which was achieved by means of high-temperature braided “rope seals”. The nozzle segments have weight effective hook-type outer band mounting to HPT outer casing and are axially retained by HPT shroud with a snap ring. The hook cavities were used as pockets for rope seals that are subsequently compressed during assembly making it more difficult. However, by special design of the pockets and parts engagement sequence, the assembly process was optimized even though it is so called blind assembly. The sealing system function is not only reducing leakages that are detrimental to a turbine efficiency, but also allow for pressurizing the cavity between the nozzle outer band and HPT outer casing with cooling air thus preventing from hot gas ingestion by higher back-flow margin (BFM) resulting in higher durability of the turbine.
7
Gu, Ke, Guangtao Zhai, Weisi Lin, Xiaokang Yang, and Wenjun Zhang. "Learning a blind quality evaluation engine of screen content images." Neurocomputing 196 (July 2016): 140–49. http://dx.doi.org/10.1016/j.neucom.2015.11.101.
Full text
8
Andronico, Patrizia, Marina Buzzi, Carlos Castillo, and Barbara Leporini. "Improving search engine interfaces for blind users: a case study." Universal Access in the Information Society 5, no. 1 (May 12, 2006): 23–40. http://dx.doi.org/10.1007/s10209-006-0022-3.
Full text
9
Huang, Chao Ming, Ping Zhang, and Hong Liang Yu. "Study on the Use of Blind ICA in Diesel Engine Vibration Processing." Applied Mechanics and Materials 239-240 (December 2012): 430–33. http://dx.doi.org/10.4028/www.scientific.net/amm.239-240.430.
Full textAbstract:
A method which can be used to analyze and separate the vibration signals of diesel engine is proposed. The vibration signals contain a great deal of information about the engine’s fault state, and it is hard to obtain the fault characteristic parameters because of the complex mechanical movement and operating conditions. Study on vibration by fourth order blind identification is carried out in this paper. And FOBI model that estimate the separation matrix by independent component analysis is established and applied to diesel engine vibration to separate the different signals. The results show that signals of different characteristics can be separated perfectly. This method can be used as the pre-processing step to obtain the fault characteristic parameters.
10
Liu, Jiang. "The Shell Molding Process Study for Mass Production of Single-Cylinder Diesel Engine Crankshaft." Applied Mechanics and Materials 44-47 (December 2010): 284–88. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.284.
Full textAbstract:
Crankshaft is a key transmission part in single-cylinder diesel engine, but its mass casting production is a problem. Based on the traditional shell molding process of ductile iron castings, this study did lots of techniques optimization for the crankshaft castings of single-cylinder diesel engine. Through increasing the multi-block or a combination of chill iron at sector-plate and upper spindle neck, increasing the pressure head of blind risers and the cross section of sprue, improving the fill compaction of iron pills, and other improvements, produces qualified ductile iron crankshaft castings without or almost without the shrinkage and other casting defects.
Dissertations / Theses on the topic "Engins blindés"
1
Lefebvre, Marie. "Résistance à l’impact balistique de matériaux composites à renforts Interlocks tissés : application au blindage de véhicules." Valenciennes, 2011. https://ged.uphf.fr/nuxeo/site/esupversions/25e254d5-2d8c-4d76-9959-cb97a45dcce8.
Full textAbstract:
Cette étude s’inscrit dans le cadre d’une recherche exploratoire innovante (REI), financée par la DGA et vise à étudier le comportement à l’impact de matériaux composites à renfort Interlock. L’objectif final de ce travail est d’intégrer dans des blindages de véhicules terrestres, un matériau composite à renfort tissé Interlock de fibres hautes performances qui sera placé à l’arrière d’un matériau métallique utilisé pour fragmenter le projectile, ici un FSP, au moment de l’impact. Le matériau composite aura un rôle d’absorbeur d’énergie durant l’impact et permettra d’arrêter les fragments métalliques suite à la pénétration du blindage métallique par le projectile. La réalisation de ce matériau passe par l’élaboration des structures tissées Interlocks sur une machine à tisser manuelle puis à la mise en œuvre des tissus par techniques d’infusion. Les matériaux sont ensuite testés en condition d’impact réel. Un critère de comparaison a été établi en prenant en compte la vitesse limite de perforation (Vlp) du matériau et les masses surfaciques de chaque structure testée afin de ramener les performances balistiques à iso masse. Pour cette étude nous avons choisi de fabriquer trois architectures Interlocks ayant des paramètres de tissage identiques. Nous avons choisi d’utiliser deux types de fibres, du Kevlar® et du Vectran® pour chaque structures. La modification du procédé de tissage et de l’infusion des matériaux a permis de faire ressortir deux structures Interlocks en Vectran® présentant un critère d’impact équivalent aux structures actuellement utilisées dans le domaine du blindage de véhiculeThis study is a part of an innovative exploratory research with the financial support of the DGA. The aim is to study the impact behaviour of Interlock composite materials. The final objective is to integrate a composite material based on Interlock weaving structure into vehicle armor system that will be placed as backing of a metal panel used to fragment the FSP projectile during the impact. The composite materials should absorb the impact energy during impact and stop the metal fragments after penetration of the metal panel by the projectile. The fabrication of these materials leads to create woven Interlock structures on a weaving loom and the implementation of the fabrics by infusion process. The materials are then impacted. A criterion of comparison was used, taking into account the speed limit perforation of the material and the area density of each impacted structures in order to compare the ballistic performance at the same weight. For this study we have made the choice to produce three Interlocks weaving structures with the same weaving parameters. We also choose to use two types of fibres, Kevlar® and Vectran® for each structure. The change of the weaving process and the infusion of materials allowed us to bring out two Interlocks structures composed of Vectran® fibres with the impact criterion equivalent to the structures currently used in the field of vehicle armor
2
Dreulle, Dominique. "Dimensionnement optimal des sources d'énergie des véhicules blindés terrestres par la prise en compte de leur profil d'emploi." Thesis, Nantes, 2018. http://www.theses.fr/2018NANT4005/document.
Full textAbstract:
L’électrification croissante des véhicules militaires va de pair avec la révolution « électrique » de ces dernières décennies. Aujourd’hui un véhicule militaire intègre plus de 120 consommateurs électriques. Cette évolution de l’électrification est également accompagnée de l’apparition de nouvelles fonctions comme le déplacement du blindé en mode furtif, animé grâce à une motorisation électrique. Dans ce contexte nous proposons de pré-dimensionner les différentes sources d’énergie du véhicule (dispositif de stockage, moteur, générateur, convertisseur). La transmission électrique est de type hybride parallèle mono-axe, l’arbre de sortie de la machine électrique est confondu avec l’arbre de sortie du moteur thermique. Ce choix est identique au prototype de véhicule blindé actuellement en étude. L’originalité des travaux repose sur le développement d’un modèle de l’emploi du véhicule pour sa phase d’utilisation la plus sensible, à savoir le combat de haute intensité. Ce modèle basé sur la matrice de Markov permet de générer aléatoirement de très nombreuses missions à partir d’une base de données enregistrée lors d’exercices d’entraînement au combat de haute intensité. Une seconde originalité réside dans la méthode de pré-dimensionnement proposée, associant le modèle d’emploi (statistique) aux modèles des flux de puissances décrivant le comportement du blindé. Le pré-dimensionnement obtenu est donc optimisé par rapport aux missions potentiellement réalisables par le véhiculeFollowing the example of the civil automotive sector, the electrification of military vehicles has widely increased during the last decades. Today, a military armoured vehicle embeds more than 120 electrical consumers. New functionalities has appeared like the hybrid electrical propulsion mode that allows stealthy moves. In this context, we propose to size the different components of the electrical propulsion such as the electric motor/alternator, storage device, electronic power converter. The propulsion selected is of parallel hybrid type. The rotary shaft of the electric motor is of the same as the combustion engine’s. This choice is similar to an armoured vehicle prototype under development today. The first original contribution of this research is the design and the use of a predictive model for a mission scenario. This model has been developed for the most critical phase, which is the high intensity engagement. This model is based on a Markov matrix, that allows to produce a lot of different missions through a random process. Input data have been recorded during several high intensity combat real training sessions. A second original contribution is the calculation method proposed. It combines the statistical modelling of the missions with the modelling of the power flows that describe the vehicle behaviour. So, the results obtained are optimized with regard to the extended field of the possible vehicle missions
3
Pesqueur, Michel. "L’emploi des blindés français sur le front occidental d’août 1944 à mai 1945." Thesis, Université de Lorraine, 2018. http://www.theses.fr/2018LORR0287/document.
Full textAbstract:
Le but de cette thèse est d’analyser l’emploi des blindés dans globalité et jusqu’aux plus petits échelons (pelotons, équipages) c’est-à-dire à hauteur d’hommes (slogan devenu à la mode depuis). En effet beaucoup d’écrits et d’études précédents restent souvent au niveau tactique voire stratégique. Il s’agit également d’étudier les éventuelles différences entre la théorie doctrinale et son application sur le terrain, voir si l’emploi des blindés variait en fonction des acteurs et si oui pourquoi. Cette étude se veut globale, elle prend en compte, les hommes (donc leur formation, leur origine, leur passé), la doctrine et le matériel car l’emploi au combat est la réunion de tous ces facteurs. Les recherches montrent que les trois GU blindées françaises n’étaient pas employées de la même façon, la raison principale résidant dans les conceptions d’emploi des chefs. Les unités blindées françaises étaient composées d’hommes au passé et au parcours différents. Des Gaullistes historiques au jeune engagé d’aout 1944 en passant par les rappelés de l’armée d’Afrique. Tous se retrouvèrent dans les tourelles avec un même but libérer le pays. Elles-mêmes avaient des origines diverses. Certaines n’avaient cessé de combattre, d’autres étaient restées en Afrique du nord ou en Afrique occidentale jusqu’au débarquement allié de novembre 1942. Mais toutes montrèrent un haut niveau de maîtrise tactique et de professionnalisme Leur équipement et leur organisation étaient homogènes car d’origine américain. Leur concept d’emploi était celui dicté par les FM qu’elles adaptèrent à leur main pour combattre à la Française et parfois marquer leur différence par rapport aux alliés. Une fois engagées, elles tinrent toute leur place aux côtés des unités alliés, prouvant leur valeur et marquant ainsi la renaissance de l’armée française. Cette unicité d’organisation, de doctrine et d’équipement masque cependant des différences dans l’emploi. Elles furent tributaires des grandes unités auxquelles elles étaient rattachées et de leur chef. L’emploi des unités blindées dépendait en grande partie des hommes. Des chefs d’abord dont tous n’avaient pas les mêmes conceptions d’emploi des unités blindées ce qui se traduisit par des frustrations et des conflits en particulier entre les généraux Leclerc et de Lattre. Mais également des équipages qui firent preuve d’un état d’esprit remarquable mais particulier et de beaucoup d’abnégationThe aim of this thesis is to analyze the use of armored vehicles globally and up to the smallest levels (platoons, crews), that is to say at the level of men (slogan that has become fashionable ever since). Indeed, many previous writings and studies often remain at the tactical or strategic level. It is also a question of studying the possible differences between the doctrinal theory and its application in the field, to see if the use of armored vehicles varied according to the actors and if so why. This study is intended to be comprehensive, it takes into account, men (thus their training, their origin, their past), doctrine and equipment because employment in combat is the meeting of all these factors. Research shows that the three French armored GUs were not employed in the same way, the main reason residing in the chiefs' conceptions of employment. French armored units were made up of men with different backgrounds and backgrounds. From the historical Gaullists to the young worker of August 1944, passing by the recalled African army. All found themselves in the turrets with the same goal to liberate the country. They themselves had various origins. Some had continued to fight, others had remained in North Africa or West Africa until the Allied landings of November 1942. But all showed a high level of tactical mastery and professionalism. Their equipment and organization were homogeneous because of American origin. Their concept of employment was that dictated by the FM that they adapted to their hand to fight the French and sometimes mark their difference compared to the allies. Once engaged, they held their place alongside the allied units, proving their value and thus marking the rebirth of the French army. This uniqueness of organization, doctrine and equipment, however, masks differences in employment. They were tributaries of the great units to which they were attached and of their leader. The use of armored units depended largely on men. Chiefs first, all of whom did not have the same conceptions of the use of armored units, which resulted in frustrations and conflicts in particular between Generals Leclerc and de Lattre. But also crews who showed a remarkable state of mind but particular and a lot of self-sacrifice
4
Carrier, Julien. "Caractérisation expérimentale et numérique aux différentes échelles de la tenue mécanique au choc d'assemblages soudés MAG." Thesis, Valenciennes, 2016. http://www.theses.fr/2016VALE0016.
Full textAbstract:
Ces travaux portent sur l'étude expérimentale et numérique de la rupture de structures soudées soumises à des sollicitations pyrotechniques telles que celles subies par les véhicules militaires sur le champ de bataille. Ce travail de thèse présente le développement de modèles éléments finis détaillés (à l’échelle mésoscopique) permettant de reproduire le comportement de ces assemblages lorsqu’ils sont sollicités par ces sollicitations dynamiques. Ils prennent en compte la géométrie locale des cordons de soudure et les différents matériaux. Pour paramétrer ces modèles, il est nécessaire de caractériser la soudure à l’échelle des matériaux constitutifs de l’assemblage. Ainsi des essais de caractérisation de leur comportement mécanique sont menés en se basant sur les vitesses de déformation relevées sur des modèles éléments finis de véhicule : quasi-statique jusqu’à 1000s-1. Pour l’analyse de la rupture, une large plage de triaxialité des contraintes est couverte au travers d’essais dédiés. Pour chaque matériau, une loi de comportement et un critère de rupture ont été déterminés par analyse inverse et validés sur des grandeurs globales et locales. Afin d’étudier la pertinence des modèles mésoscopiques, des essais au canon à gaz sont réalisés sur des assemblages soudés élémentaires en L et en T. Ils permettent de reproduire les principaux modes de rupture observés sur les pièces réelles. In fine, les simulations corrèlent les essais en termes de mode et de seuil d’apparition de la rupture. Ceci valide les lois de comportement identifiées et la modélisation mésoscopique proposéeFinite element modeling is commonly used to design armored vehicles and to evaluate the strength of the structure against mine explosion. This study investigates experimental and numerical failure of welded structures submitted to such dynamic loadings. The goal is to develop detailed finite element models at meso-scale that allow to predict the behavior and failure of welded joints at intermediate strain rates. These models must take into account the local properties of the welded joint as the geometries as the mechanical behavior of the constitutive materials. Experimental characterizations of the material behavior are led on tensile specimens from quasi-static loading up to 1000s-1. This strain rates range results from analysis on vehicle finite element models. Dedicated tests are also conducted to study the material failure on a large range of stress triaxiality values. For each constitutive material, the hardening and failure parameters are identified through a reverse engineering approach. To validate the meso-scale models, gas gun tests are led on basic L and T welded assemblies. Modes and thresholds of failure are correctly replicated thanks to these finite element models. This validates the identified material behavior laws and the proposed meso-scale modeling
5
Clark, William H. IV. "Blind Comprehension of Waveforms through Statistical Observations." Thesis, 2015. http://hdl.handle.net/10919/52908.
Full textAbstract:
This paper proposes a cumulant based classification means to identify waveforms for a blind receiver in the presence of time varying channels, which is built from the work done on cumulants in static channels currently in the literature. Results show the classification accuracy is on the order or better than current methods in use in static channels that do not vary over an observation period. This is accomplished by making use of second through tenth order cumulants in a signature vector that the search engine platform has the means of differentiating. A receiver can then blindly identify waveforms accurately in the presence of multipath Rayleigh fading with AWGN noise.
Channel learning occurs prior to classification in order to identify the consistent distortion pattern for a waveform that is observable in the signature vector. Then using a database look-up method, the observed waveform is identified as belonging to a particular cluster based on the observed signature vector. If the distortion patterns are collected from a variety of channel types, the database can then classify both the waveform and the rough channel type that the waveform passed through. If the exact channel model or channel parameters is known and used as a limiter, significant improvement on the waveform classification can be achieved. Greater accuracy comes from using the exact channel model as the limiter.Master of Science
6
Yi-Fan, Yang. "Specialized Design of Web Search Engine for the Blind People." 2006. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0016-0109200613414314.
Full text
7
Yang, Yi-Fan, and 楊以凡. "Specialized Design of Web Search Engine for the Blind People." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/37913873095992117418.
Full textAbstract:
碩士國立清華大學
工業工程與工程管理學系
94
As time goes on, the influence of Internet becomes more and more noticeable. Internet has shortened the distance between each other. With the development of multimedia technology, a lot of webpage designers use a large number of magnificent audio-visual contents to make the characteristics of the webpage stand out and attractive. However, the difficulties which the disabled persons have when browsing through the webpages have not been taken into consideration. As a result, the disabled persons, especially the blind people can not use the resources of Internet swimmingly, and thus they may be refused by the Internet, not to mention that they can surf the Web by themselves. In this research, Google Website was taken as a Web prototype to get modified. Specialized Search Engine for the Blind (SSEB) was constructed with an accessible interface and some improved functions (i.e., searching assistance functions, user-centered functions, and specialized design for the blind). An experiment was conducted to verify the effect of SSEB. From experimental results, it’s significant that users attained better performance in SSEB than in Google. Users also showed higher satisfaction with SSEB. This research proves that the consideration for designing an accessible website for the blind users is very important. It is expected that the users group of SSEB can be expanded to all visual-impaired people in the future. So that all people can keep pace with the changing World Wide Web, and make good use of all the Internet resources without disabilities and limitations.
8
Fang, Chung-Ho, and 方忠和. "Improving search engine interfaces for blind users by applying Specialized Client-Side JavaScript." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/76821184654773838543.
Full textAbstract:
碩士國立清華大學
資訊工程學系
95
With the development of information technology, search engines have become a necessary media in searching for information on the internet. However, the design of websites usually did not take web accessibility into consideration and visually impaired users encountered difficulties in retrieving required information. The current study used client-side JavaScript to improve the interfaces of the search engines. The objectives are making interfaces more suitable for visually impaired users either with screen reader or Braille and providing the same interface and functions for different search engines. The above-mentioned achievements can make the search tasks more efficient for all users and also demonstrate that client-side JavaScript can better website interfaces. The study had 5 blind participants to try out Specialized Client-Side JavaScript (SCSJ). The results showed that SCSJ successfully enhanced the efficiency in acquiring information for the blind. It is hoped SCSJ can be applied to other websites and make information easy access to everyone.
9
Wang, Sili. "Indoor Navigation For The Blind And Visually Impaired: Validation And Training Methodology Using Virtual Reality." 2017. https://scholarworks.umass.edu/masters_theses_2/485.
Full textAbstract:
In this thesis we propose a navigation instruction validation tool and an user training tool for PERCEPT system.
The validation tool evaluates the navigation instructions using a virtual reality environment by ensuring that each path in the virtual environment can be traversed by following the navigation instructions. This validation tool will serve as a first automatic validation of navigation instructions prior to testing them with blind and visually impaired users.
The user-training tool enables the blind user to explore and get familiar with the real environment by using the virtual environment generated in the Unity3d based game. The user interacts with the game using PERCEPT Smartphone client just like the user would interact in the real environment. Motion in the game is emulated using the keyboard. Motion directions follow the navigation instructions obtained through the Smartphone. This user-training tool will improve the users experience in the real environment by enabling them to explore and learn the environment a-priori to their arrival in the physical space.
Books on the topic "Engins blindés"
1
Military vehicles: 300 of the world's most effective military vehicles. Hoo, UK: Grange Books, 2007.
Find full text
2
R, Hart, ed. German tanks of World War II. London: Brown Books, an imprint of Amber Books, 1999.
Find full text
3
Thers, Alexandre. Blinde s en Normandie: Juin-aou t 1944. Paris: Histoire & collections, 2003.
Find full text
4
Ferrard, Stéphane. Engins blindés français: Cent ans d'histoire. Paris: EPA, 1996.
Find full text
7
Debay, Yves. VBL PANHARD (Military Equipment of the World). Histoire and Collections, 2004.
Find full text
8
Wiek, Till. It's True... I Might Be Half Deaf and Blind but I Can Still Hear a Radial Engine from over a Mile Away: 110 Game Sheets - 660 Tic-Tac-Toe Blank Games - Soft Cover Book for Kids for Traveling & Summer Vacations - Mini Game - Clever Kids - 110 Lined Pages -. Independently Published, 2019.
Find full textBook chapters on the topic "Engins blindés"
1
Yang, Yi-Fan, and Sheue-Ling Hwang. "Specialized Design of Web Search Engine for the Blind People." In Lecture Notes in Computer Science, 997–1005. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-73283-9_108.
Full text
2
Akil, Moussa, and Christine Servière. "Separability of Convolutive Mixtures: Application to the Separation of Combustion Noise and Piston-Slap in Diesel Engine." In Independent Component Analysis and Blind Signal Separation, 319–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11679363_40.
Full text
3
"“Blind Growth”:." In China’s Engine of Environmental Collapse, 16–48. Pluto Press, 2020. http://dx.doi.org/10.2307/j.ctv13qfwbz.8.
Full text
4
"Friedrich Engels. Review of Karl Blind's Article "Prince Napoleon and European Democracy"." In Karl Marx / Friedrich Engels: Werke, Artikel, Entwürfe, Mai 1875 bis Mai 1883, 186–87. Akademie Verlag, 2020. http://dx.doi.org/10.1515/9783050076195-027.
Full text
5
Anbarasi, S., S. Krishnaveni, R. Aruna, and K. Karpagasaravanakumar. "Smart Reader Glass for Blind and Visually Impaired People." In Recent Trends in Intensive Computing. IOS Press, 2021. http://dx.doi.org/10.3233/apc210303.
Full textAbstract:
Visually impaired people fail to read the text with existing technology. The proposed project targeted to design a spectacle with a camera by which the blind visually impaired people can read whatever they want to read based on contemporary OCR (optical character recognition) technique and text-to-speech (TTS) engines. This proposed smart reader will read any kind of documents like books, magazines and mobiles. People can access this novel technology with blindness and limited vision. The earlier version of the proposed project was developed successfully with mobile reader which had certain drawbacks such as high cost due to the need of android mobile, not user friendly and improper focusing. To overcome these disadvantages, a spectacle type reader with camera is proposed in this project, which will be cost effective and more efficient.
6
Kumar Sarkar, Pradip. "Driver Assistance Technologies." In Transportation Systems for Smart, Sustainable, Inclusive and Secure Cities [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94354.
Full textAbstract:
Topic: Driver Assistance Technology is emerging as new driving technology popularly known as ADAS. It is supported with Adaptive Cruise Control, Automatic Emergency Brake, blind spot monitoring, lane change assistance, and forward collision warnings etc. It is an important platform to integrate these multiple applications by using data from multifunction sensors, cameras, radars, lidars etc. and send command to plural actuators, engine, brake, steering etc. ADAS technology can detect some objects, do basic classification, alert the driver of hazardous road conditions, and in some cases, slow or stop the vehicle. The architecture of the electronic control units (ECUs) is responsible for executing advanced driver assistance systems (ADAS) in vehicle which is changing as per its response during the process of driving. Automotive system architecture integrates multiple applications into ADAS ECUs that serve multiple sensors for their functions. Hardware architecture of ADAS and autonomous driving, includes automotive Ethernet, TSN, Ethernet switch and gateway, and domain controller while Software architecture of ADAS and autonomous driving, including AUTOSAR Classic and Adaptive, ROS 2.0 and QNX. This chapter explains the functioning of Assistance Driving Technology with the help of its architecture and various types of sensors.
7
van Santen, Rutger, Djan Khoe, and Bram Vermeer. "Managing Failures." In 2030. Oxford University Press, 2010. http://dx.doi.org/10.1093/oso/9780195377170.003.0023.
Full textAbstract:
Computers are the engines that drive our society. We get paid via computer, and we use them to vote in elections; computers decide whether to deploy the airbags in our car; and doctors use them to help identify a patient’s injuries. Computers are embedded in all sorts of processes nowadays, and that can make us vulnerable. Because of a single computer glitch, large payment systems can grind to a halt. When computers malfunction, we risk losing our power supply, our railway links, and our communications. Worst of all, we habitually shift responsibility to computers and blindly follow their advice. This is why patients occasionally receive ridiculously high doses of a powerful drug or a car driver who blindly follows his satnav may end up in a ditch. Ubiquitous computer use can cause otherwise responsible people to leave their common sense at home. We’re all too familiar with poorly designed software, computer errors, or—worse still—programs that flatly refuse to function properly no matter what we do. It is hardly surprising then that computer failures cost the world hundreds of billions of dollars a year. In the United States alone, failed computer projects are believed to waste $55 billion annually. And the media only report the tip of the iceberg— the foul-ups that cost millions or result in fatalities. For instance, in the 1980s, several cancer patients were killed by a programming error that caused the Therac 25 radiotherapy unit to deliver excessive doses of radiation. In 1996, Europe’s first Ariane 5 rocket had to be blown up a mere 37 seconds after launch in what might be the costliest software failure in history. In 2007, six F-22 aircraft experienced multiple computer crashes as they crossed the date line, disabling all navigation and communication systems. The list can be extended endlessly, and there are many more failures that we never hear about. Only about a third of all computer projects can be described as successful, and even these are hardly error-free. Why can’t we prevent programming mistakes? Could we improve computers and their software to protect society from the “moods”’ of its digital machines?
8
Saremi, Amin. "Spatial Audio Signal Processing for Speech Telecommunication inside Vehicles." In Advances in Fundamental and Applied Research on Spatial Audio [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.105002.
Full textAbstract:
Since the introduction of hands-free telephony applications and speech dialog systems in automotive industry in 1990s, microphones have been mounted in car cabins to capture, and route the driver’s speech signals to the corresponding telecommunication networks. A car cabin is a noisy and reverberant environment where engine activity, structural vibrations, road bumps, and cross-talk interferences can add substantial amounts of acoustic noise to the captured speech signal. To enhance the speech signal, a variety of real-time signal enhancement methods such as acoustic echo cancelation, noise reduction, de-reverberation, and beamforming are typically applied. Moreover, the recent introduction of AI-driven online voice assistants in automotive industry has resulted in new requirements on speech signal enhancement methods to facilitate accurate speech recognition. In this chapter, we focus on spatial filtering techniques that are designed to spatially enhance signals that arrive from certain directions while attenuating signals that originate from other locations. The fundamentals of conventional beamforming and echo cancelation are explained and are accompanied by some real-world examples. Moreover, more recent techniques (namely blind source segregation, and neural-network based adaptive beamforming) are presented in the context of automotive applications. This chapter provides the readers with both fundamental and hands-on insights into the fast-growing field of automotive speech signal processing.
Conference papers on the topic "Engins blindés"
1
Stadler, Viktor, and Helmut Hlavacs. "Blind Adventure - A Game Engine for Blind Game Designers." In CHI PLAY '18: The annual symposium on Computer-Human Interaction in Play. New York, NY, USA: ACM, 2018. http://dx.doi.org/10.1145/3242671.3242703.
Full text
2
Kessler, Travis, Thomas Schwartz, Hsi-Wu Wong, and J. Hunter Mack. "Predicting the Cetane Number, Yield Sooting Index, Kinematic Viscosity, and Cloud Point for Catalytically Upgraded Pyrolysis Oil Using Artificial Neural Networks." In ASME 2020 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/icef2020-2978.
Full textAbstract:
Abstract The conversion of biomass using fast pyrolysis has the potential to be significantly less expensive at scale compared to alternative methods such as fermentation and gasification. Selective upgrading of the products of fast pyrolysis through chemical catalysis produces compounds with lower oxygen content and lower acidity; however, identifying the specific catalytic pathways for producing viable fuels and fuel additives often requires a trial-and-error approach. Specifically, key properties of the compounds must be experimentally tested to evaluate the viability of the resultant compounds. The present work proposes predictive models constructed with artificial neural networks (ANNs) for cetane number (CN), yield sooting index (YSI), kinematic viscosity (KV), and cloud point (CP), with blind test set median absolute errors of 5.14 cetane units, 3.36 yield sooting index units, 0.07 millimeters squared per second, and 4.89 degrees Celsius, respectively. Furthermore, the cetane number, yield sooting index, kinematic viscosity, and cloud point were predicted for over three hundred expected products from the catalytic upgrading of pyrolysis oil. It was discovered that 130 of these compounds have predicted cetane numbers greater than 40, with four of these compounds possessing predicted yield sooting index values significantly less than that of diesel fuel and predicted viscosities and cloud points comparable to that of diesel fuel.
3
Kessler, Travis, Thomas Schwartz, Hsi-Wu Wong, and J. Hunter Mack. "Evaluating Diesel/Biofuel Blends Using Artificial Neural Networks and Linear/Nonlinear Equations." In ASME 2021 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/icef2021-67785.
Full textAbstract:
Abstract The use of biomass-derived additives in diesel fuel mixtures has the potential to increase the fuel’s efficiency, decrease the formation of particulate matter during its combustion, and retain the fuel’s behavior in cold weather. To this end, identifying compounds that enable these behaviors is paramount. The present work utilizes a series of linear and non-linear equations in series with artificial neural networks to predict the cetane number, yield sooting index, kinematic viscosity, cloud point, and lower heating value of multi-component blends. Property values of pure components are predicted using artificial neural networks trained with existing experimental data, and these predictions and their expected errors are propagated through linear and non-linear equations to obtain property predictions for multi-component blends. Individual component property prediction errors, defined by blind prediction median absolute error, are 4.91 units, 7.84 units, 0.06 cSt, 4.00 °C, and 0.55 MJ/kg for cetane number, yield sooting index, kinematic viscosity, cloud point, and lower heating value respectively. On average, property predictions for blends are shown to be accurate to within 6% of the blends’ experimental values. Further, a multitude of compounds expected to be produced from catalytically upgrading products of fast pyrolysis are evaluated with respect to their behavior in diesel fuel blends.
4
Kaklanis, Nikolaos, Juan González Calleros, Jean Vanderdonckt, and Dimitrios Tzovaras. "A haptic rendering engine of web pages for blind users." In the working conference. New York, New York, USA: ACM Press, 2008. http://dx.doi.org/10.1145/1385569.1385653.
Full text
5
Simon, Donald L., Sébastien Borguet, Olivier Léonard, and Xiaodong (Frank) Zhang. "Aircraft Engine Gas Path Diagnostic Methods: Public Benchmarking Results." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-95077.
Full textAbstract:
Recent technology reviews have identified the need for objective assessments of aircraft engine health management (EHM) technologies. To help address this issue, a gas path diagnostic benchmark problem has been created and made publicly available. This software tool, referred to as the Propulsion Diagnostic Method Evaluation Strategy (ProDiMES), has been constructed based on feedback provided by the aircraft EHM community. It provides a standard benchmark problem enabling users to develop, evaluate and compare diagnostic methods. This paper will present an overview of ProDiMES along with a description of four gas path diagnostic methods developed and applied to the problem. These methods, which include analytical and empirical diagnostic techniques, will be described and associated blind-test-case metric results will be presented and compared. Lessons learned along with recommendations for improving the public benchmarking processes will also be presented and discussed.
6
Yongman, Lin, and Lin Tusheng. "Engine Noise of Identification using an Improved Blind Sources Separation Algorithm." In Third International Conference on Natural Computation (ICNC 2007). IEEE, 2007. http://dx.doi.org/10.1109/icnc.2007.357.
Full text
7
Yong Chang and Yihuai Hu. "Fault diagnosis of marine diesel engine based on blind source separation." In 2nd International Conference on Computer and Automation Engineering (ICCAE 2010). IEEE, 2010. http://dx.doi.org/10.1109/iccae.2010.5451207.
Full text
8
Lamouroux, Jean, Stéphane Richard, Quentin Malé, Gabriel Staffelbach, Antoine Dauptain, and Antony Misdariis. "On the Combination of Large Eddy Simulation and Phenomenological Soot Modelling to Calculate the Smoke Index From Aero-Engines Over a Large Range of Operating Conditions." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-64262.
Full textAbstract:
Nowadays, models predicting soot emissions are, neither able to describe correctly fine effects of technological changes on sooting trends nor sufficiently validated at relevant operating conditions to match design office quantification needs. Yet, phenomenological descriptions of soot formation, containing key ingredients for soot modeling exist in the literature, such as the well-known Leung et al. model (Combust Flame 1991). This approach indeed includes contributions of nucleation, surface growth, coagulation, oxidation and thermophoretic transport of soot. When blindly applied to aeronautical combustors for different operating conditions, this model fails to hierarchize operating points compared to experimental measurements. The objective of this work is to propose an extension of the Leung model, including an identification of its constants over a wide range of condition relevant of gas turbines operation. Today, the identification process can hardly be based on laboratory flames since few detailed experimental data are available for heavy-fuels at high pressure. Thus, it is decided to directly target smoke number values measured at the engine exhaust for a variety of combustors and operating conditions from idling to take-off. A Large Eddy Simulation approach is retained for its intrinsic ability to reproduce finely unsteady behavior, mixing and intermittency. In this framework, The Leung model for soot is coupled to the TFLES model for combustion. It is shown that pressure-sensitive laws for the modelling constant of the soot surface chemistry are sufficient to reproduce engine emissions. Grid convergence is carried out to verify the robustness of the proposed approach. Several cases are then computed blindly to assess the prediction capabilities of the extended model. This study paves the way for the systematic use of a high fidelity tool solution in design office constraints for combustion chamber development.
9
Shetty, Devdas, Tom Eppes, Nikolai Nazaryan, Jun Kondo, and Claudio Campana. "New Approach to the Inspection of Cooling Holes in Aero-Engines." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-16097.
Full textAbstract:
The need for improved thermal efficiency of jet engines has led to changes in the design of combustor turbine blades. Modern turbine stage inlet temperatures now exceed the melting point temperatures of turbine blade materials. Super alloys, based on nickel, have been developed for use as blades, guide vanes, afterburners etc. To combat and avert blade failure caused by excessive operating temperatures, film cooling has been incorporated into blade design. In film cooling, cool air is bled from the compressor stage, ducted into internal chambers of the turbine blades, and discharged through small holes in the blade walls. This provides a thin, cool, insulating blanket along the external surface of the turbine blade. Large numbers of shaped holes have allowed designers to maximize the cooling effect. This paper explores a new design for measuring the presence and depth of blind holes in turbine blade. In the paper, we examine the inspection techniques currently in use and present a novel optical technique as an alternative. To precisely control the location of the holes on the turbine blade, an XYZ inspection stage is employed. Using a small collimating tube, a micro-beam illuminates each hole in a pre-programmed fashion. Depending on the level of reflected intensity and when it occurs, the presence of a hole bottom is determined. The optical inspection system consists of a laser, motorized micropositioning stage, collimating tubes, data acquisition software and a customized fixture for manipulating the samples.
10
Basir-Kazeruni, Sina, Stefan Vlaski, Hawraa Salami, Ali H. Sayed, and Dejan Markovic. "A blind Adaptive Stimulation Artifact Rejection (ASAR) engine for closed-loop implantable neuromodulation systems." In 2017 8th International IEEE/EMBS Conference on Neural Engineering (NER). IEEE, 2017. http://dx.doi.org/10.1109/ner.2017.8008322.
Full text