La Dilution D’Une Solution
•Télécharger en tant que PPT, PDF•
2 j'aime•3,180 vues
Signaler
Partager
Signaler
Partager
![Exp érience: diluez votre solution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Recommandé
Automotive Anodizing
The document summarizes automotive specifications for aluminum anodizing from various standards organizations. It outlines the general requirements for General Motors, Ford, DaimlerChrysler, Japanese, German, and European standards. All require various testing such as adhesion, thickness, and corrosion resistance testing. It also provides information on documentation required for the Production Part Approval Process (PPAP) such as process studies, control plans, and measurement analysis.
Power Point detailed
This document provides an overview of the processes and capacities of Metal Finishing Company and its various divisions. It lists over 50 surface treatment processes that are available, including abrasive blasting, various plating and coating methods, cleaning, anodizing, passivation, and heat treating. Tank sizes and equipment details are provided for many of the processes. The document also outlines the services available through Metal Finishing Company's divisions in Wichita, Kansas, Wellington, Kansas, and Chihuahua City, Mexico, which include additional plating, anodizing, coating, cleaning, and non-destructive testing capabilities.
Automotive Standards And QC Tests
Aluminum Anodizing for the automotive industry by AACOA, Inc., Niles, MI - Automotive standards and quality control testing.
Anodized aluminum measurement
Aluminium oxide (Alumina)is widely used as protective coating in various application. Optical alumina mainly depends on deposition condition. probe system is used to measure both thickness and optical constant.
Industrial chemistry lecture on sulfuric acid (ji&rb)
Sulfuric acid has strong acidic properties, is colorless and oily, and is produced industrially via the contact process. It is widely used in applications like lead-acid batteries, fertilizer production, metal pickling, and manufacture of other acids due to its dehydrating ability. Exposure can cause severe burns and its atmospheric emissions contribute to acid rain.
Surface finishing processes - Electroplating
The presentation takes into account widely used surface finishing processes including electroplating, anodizing, alodining, cadmium plating, zinc plating, phosphating, passivation
Effect of Nanoporous Anodic Aluminum Oxide (AAO) Characteristics On Solar Abs...
Nanoporous anodic aluminum oxide (AAO) has been used in many different fields of science and technology, due to its great structural characteristics. Solar selective surface is an important application of this type porous material. This paper investigates the effect of nanoporous AAO properties, including; film thickness, pore area percentage and pore diameter, on absorption spectra in the range of solar radiation. The parameters were verified individually depending on anodization condition, and the absorption spectra were characterized using spectrophotometer analysis. The results showed that the absorptivity was increased with growth of the film thickness. Furthermore, increasing the pore diameter shifted the absorption spectra to the right range, and vice versa. The investigation revealed the presence of an optimum pore area percentage around 14% in which the absorptivity was at its maximum value.
A SHORT REVIEW ON ALUMINIUM ANODIZING: AN ECO-FRIENDLY METAL FINISHING PROCESS
Protection of aluminium alloys is most commonly done by forming anodic films. Anodic films can also be formed on metals like titanium, zinc, magnesium, niobium, and tantalum. Aluminium alloy parts are anodized to greatly increase the thickness of the natural oxide layer for corrosion resistance. A thin aluminium oxide film, that seals the aluminium from further oxidation when it is exposed to air. The anodizing process increases the thickness of the oxidized surface. Anodizing is accomplished by immersing the aluminium into an acid electrolyte bath and passing an electric current through the medium. In an anodizing cell, the aluminium work piece is made the anode by connecting it to the positive terminal of a dc power supply and the cathode is connected to the negative terminal of the dc source. Sealing is needed to seal the pores in oxide layer to prevent further corrosion. Oxide layer on the anodized aluminium has a highly ordered, porous structure that allows for secondary processes such as dyeing, printing and sealing. Nanowires and nanotubes can be made by using the pores in the oxide layer as templates.
Recommandé
Automotive Anodizing
The document summarizes automotive specifications for aluminum anodizing from various standards organizations. It outlines the general requirements for General Motors, Ford, DaimlerChrysler, Japanese, German, and European standards. All require various testing such as adhesion, thickness, and corrosion resistance testing. It also provides information on documentation required for the Production Part Approval Process (PPAP) such as process studies, control plans, and measurement analysis.
Power Point detailed
This document provides an overview of the processes and capacities of Metal Finishing Company and its various divisions. It lists over 50 surface treatment processes that are available, including abrasive blasting, various plating and coating methods, cleaning, anodizing, passivation, and heat treating. Tank sizes and equipment details are provided for many of the processes. The document also outlines the services available through Metal Finishing Company's divisions in Wichita, Kansas, Wellington, Kansas, and Chihuahua City, Mexico, which include additional plating, anodizing, coating, cleaning, and non-destructive testing capabilities.
Automotive Standards And QC Tests
Aluminum Anodizing for the automotive industry by AACOA, Inc., Niles, MI - Automotive standards and quality control testing.
Anodized aluminum measurement
Aluminium oxide (Alumina)is widely used as protective coating in various application. Optical alumina mainly depends on deposition condition. probe system is used to measure both thickness and optical constant.
Industrial chemistry lecture on sulfuric acid (ji&rb)
Sulfuric acid has strong acidic properties, is colorless and oily, and is produced industrially via the contact process. It is widely used in applications like lead-acid batteries, fertilizer production, metal pickling, and manufacture of other acids due to its dehydrating ability. Exposure can cause severe burns and its atmospheric emissions contribute to acid rain.
Surface finishing processes - Electroplating
The presentation takes into account widely used surface finishing processes including electroplating, anodizing, alodining, cadmium plating, zinc plating, phosphating, passivation
Effect of Nanoporous Anodic Aluminum Oxide (AAO) Characteristics On Solar Abs...
Nanoporous anodic aluminum oxide (AAO) has been used in many different fields of science and technology, due to its great structural characteristics. Solar selective surface is an important application of this type porous material. This paper investigates the effect of nanoporous AAO properties, including; film thickness, pore area percentage and pore diameter, on absorption spectra in the range of solar radiation. The parameters were verified individually depending on anodization condition, and the absorption spectra were characterized using spectrophotometer analysis. The results showed that the absorptivity was increased with growth of the film thickness. Furthermore, increasing the pore diameter shifted the absorption spectra to the right range, and vice versa. The investigation revealed the presence of an optimum pore area percentage around 14% in which the absorptivity was at its maximum value.
A SHORT REVIEW ON ALUMINIUM ANODIZING: AN ECO-FRIENDLY METAL FINISHING PROCESS
Protection of aluminium alloys is most commonly done by forming anodic films. Anodic films can also be formed on metals like titanium, zinc, magnesium, niobium, and tantalum. Aluminium alloy parts are anodized to greatly increase the thickness of the natural oxide layer for corrosion resistance. A thin aluminium oxide film, that seals the aluminium from further oxidation when it is exposed to air. The anodizing process increases the thickness of the oxidized surface. Anodizing is accomplished by immersing the aluminium into an acid electrolyte bath and passing an electric current through the medium. In an anodizing cell, the aluminium work piece is made the anode by connecting it to the positive terminal of a dc power supply and the cathode is connected to the negative terminal of the dc source. Sealing is needed to seal the pores in oxide layer to prevent further corrosion. Oxide layer on the anodized aluminium has a highly ordered, porous structure that allows for secondary processes such as dyeing, printing and sealing. Nanowires and nanotubes can be made by using the pores in the oxide layer as templates.
Aluminum Anodizing
Anodizing is an electrochemical process that converts the metal surface of aluminum to aluminum oxide. It produces a coating that is very durable, corrosion resistant, and maintains the metallic appearance of the aluminum. The anodizing process involves racking parts for processing, cleaning, etching, anodizing in an acid bath using electricity, coloring or sealing the pores, and testing to quality check the coating. Anodized aluminum has advantages like durability, low maintenance, and an environmentally friendly process.
Nickel alloys corrosion performance chart
This document provides a chart summarizing the corrosion performance of various metals and alloys when exposed to different fluids. The chart lists metals/alloys down the left column and fluids across the top row, indicating each material's corrosion resistance to that fluid through performance ratings of outstanding, be alert, or N/A (not applicable). It is intended as a general reference for selecting metals/alloys when exposed to various fluids.
TALAT Lecture 5203: Anodizing of Aluminium
This lecture describes the process of anodic oxidation of aluminium, which is one of the most unique and commonly used surface treatment techniques for aluminium; it illustrates the weathering behaviour of anodized surfaces. Some familiarity with the subject matter covered in TALAT This lectures 5101- 5104 is assumed.
M a. rengifo (2009). estudio por micro raman del comportamiento del anodizado...
Este documento presenta un estudio del comportamiento del anodizado de aluminio usando tres electrolitos diferentes: ácido sulfúrico, ácido fosfórico y ácido oxálico. Se caracterizaron las películas de óxido formadas mediante espectroscopia Raman y se analizaron las soluciones electrolíticas por absorción atómica. Los resultados mostraron que se disuelve más aluminio en la solución de ácido sulfúrico y que la disolución aumenta con la concentración de ácido oxálico. Los espectros Raman
Residu d'àcid sulfúric_ Butlletí_09/10
Cas pràctic de gestió d'àcid sulfúric diluït com a subproducte
LBI General Presentation
This document summarizes the services provided by a Dutch company that specializes in surface treatment and coating processes. The company has been in business for over 20 years and provides anodizing, electroplating, powder coating, and galvanizing services. It has modern facilities and equipment to design, model, engineer, and produce surface treatments using techniques like CNC production. The company aims to provide full service solutions from design to implementation and maintenance for surface coating needs.
unidad 4. PRODUCCION DE FURFURAL.
El documento describe el proceso de producción de furfural a partir de bagazo de caña de azúcar. Inicialmente el bagazo es pretratado y luego sometido a hidrólisis con ácido sulfúrico en reactores. El furfural formado se extrae con vapor de agua y se purifica mediante destilación y refinación para eliminar impurezas. El furfural tiene diversos usos industriales como agente decolorante y solvente.
Ve day post tripl 2010
The document outlines the 12-day itinerary for the 2010 Bell High School 65th VE Day tour of sites related to World War 2 in Europe. The itinerary includes visits to memorial sites in Paris, Normandy, Belgium, and Germany from April 29 to May 10. The tour commemorates VE Day and visits important locations such as Versailles, Notre Dame, Arromanche Beach, Vimy Ridge Memorial, Menin Gate Memorial, and sites in Berlin, Potsdam, and the Netherlands.
Contenu connexe
En vedette
Aluminum Anodizing
Anodizing is an electrochemical process that converts the metal surface of aluminum to aluminum oxide. It produces a coating that is very durable, corrosion resistant, and maintains the metallic appearance of the aluminum. The anodizing process involves racking parts for processing, cleaning, etching, anodizing in an acid bath using electricity, coloring or sealing the pores, and testing to quality check the coating. Anodized aluminum has advantages like durability, low maintenance, and an environmentally friendly process.
Nickel alloys corrosion performance chart
This document provides a chart summarizing the corrosion performance of various metals and alloys when exposed to different fluids. The chart lists metals/alloys down the left column and fluids across the top row, indicating each material's corrosion resistance to that fluid through performance ratings of outstanding, be alert, or N/A (not applicable). It is intended as a general reference for selecting metals/alloys when exposed to various fluids.
TALAT Lecture 5203: Anodizing of Aluminium
This lecture describes the process of anodic oxidation of aluminium, which is one of the most unique and commonly used surface treatment techniques for aluminium; it illustrates the weathering behaviour of anodized surfaces. Some familiarity with the subject matter covered in TALAT This lectures 5101- 5104 is assumed.
M a. rengifo (2009). estudio por micro raman del comportamiento del anodizado...
Este documento presenta un estudio del comportamiento del anodizado de aluminio usando tres electrolitos diferentes: ácido sulfúrico, ácido fosfórico y ácido oxálico. Se caracterizaron las películas de óxido formadas mediante espectroscopia Raman y se analizaron las soluciones electrolíticas por absorción atómica. Los resultados mostraron que se disuelve más aluminio en la solución de ácido sulfúrico y que la disolución aumenta con la concentración de ácido oxálico. Los espectros Raman
Residu d'àcid sulfúric_ Butlletí_09/10
Cas pràctic de gestió d'àcid sulfúric diluït com a subproducte
LBI General Presentation
This document summarizes the services provided by a Dutch company that specializes in surface treatment and coating processes. The company has been in business for over 20 years and provides anodizing, electroplating, powder coating, and galvanizing services. It has modern facilities and equipment to design, model, engineer, and produce surface treatments using techniques like CNC production. The company aims to provide full service solutions from design to implementation and maintenance for surface coating needs.
unidad 4. PRODUCCION DE FURFURAL.
El documento describe el proceso de producción de furfural a partir de bagazo de caña de azúcar. Inicialmente el bagazo es pretratado y luego sometido a hidrólisis con ácido sulfúrico en reactores. El furfural formado se extrae con vapor de agua y se purifica mediante destilación y refinación para eliminar impurezas. El furfural tiene diversos usos industriales como agente decolorante y solvente.
En vedette (13)
M a. rengifo (2009). estudio por micro raman del comportamiento del anodizado...
M a. rengifo (2009). estudio por micro raman del comportamiento del anodizado...
Plus de lisahetherington
Ve day post tripl 2010
The document outlines the 12-day itinerary for the 2010 Bell High School 65th VE Day tour of sites related to World War 2 in Europe. The itinerary includes visits to memorial sites in Paris, Normandy, Belgium, and Germany from April 29 to May 10. The tour commemorates VE Day and visits important locations such as Versailles, Notre Dame, Arromanche Beach, Vimy Ridge Memorial, Menin Gate Memorial, and sites in Berlin, Potsdam, and the Netherlands.
Plus de lisahetherington (20)
La DéTermination De La Formule MoléCulaire Par LéTudiant
La DéTermination De La Formule MoléCulaire Par LéTudiant
Dernier
Ouvrez la porte ou prenez un mur (Agile Tour Genève 2024)
(Conférence dessinée)
Vous êtes certainement à l’origine, ou impliqué, dans un changement au sein de votre organisation. Et peut être que cela ne se passe pas aussi bien qu’attendu…
Depuis plusieurs années, je fais régulièrement le constat de l’échec de l’adoption de l’Agilité, et plus globalement de grands changements, dans les organisations. Je vais tenter de vous expliquer pourquoi ils suscitent peu d'adhésion, peu d’engagement, et ils ne tiennent pas dans le temps.
Heureusement, il existe un autre chemin. Pour l'emprunter il s'agira de cultiver l'invitation, l'intelligence collective , la mécanique des jeux, les rites de passages, .... afin que l'agilité prenne racine.
Vous repartirez de cette conférence en ayant pris du recul sur le changement tel qu‘il est généralement opéré aujourd’hui, et en ayant découvert (ou redécouvert) le seul guide valable à suivre, à mon sens, pour un changement authentique, durable, et respectueux des individus! Et en bonus, 2 ou 3 trucs pratiques!
De l'IA comme plagiat à la rédaction d'une « charte IA » à l'université
L'IA connaît une croissance rapide et son intégration dans le domaine éducatif soulève de nombreuses questions. Aujourd'hui, nous explorerons comment les étudiants utilisent l'IA, les perceptions des enseignants à ce sujet, et les mesures possibles pour encadrer ces usages.
Constat Actuel
L'IA est de plus en plus présente dans notre quotidien, y compris dans l'éducation. Certaines universités, comme Science Po en janvier 2023, ont interdit l'utilisation de l'IA, tandis que d'autres, comme l'Université de Prague, la considèrent comme du plagiat. Cette diversité de positions souligne la nécessité urgente d'une réponse institutionnelle pour encadrer ces usages et prévenir les risques de triche et de plagiat.
Enquête Nationale
Pour mieux comprendre ces dynamiques, une enquête nationale intitulée "L'IA dans l'enseignement" a été réalisée. Les auteurs de cette enquête sont Le Sphynx (sondage) et Compilatio (fraude académique). Elle a été diffusée dans les universités de Lyon et d'Aix-Marseille entre le 21 juin et le 15 août 2023, touchant 1242 enseignants et 4443 étudiants. Les questionnaires, conçus pour étudier les usages de l'IA et les représentations de ces usages, abordaient des thèmes comme les craintes, les opportunités et l'acceptabilité.
Résultats de l'Enquête
Les résultats montrent que 55 % des étudiants utilisent l'IA de manière occasionnelle ou fréquente, contre 34 % des enseignants. Cependant, 88 % des enseignants pensent que leurs étudiants utilisent l'IA, ce qui pourrait indiquer une surestimation des usages. Les usages identifiés incluent la recherche d'informations et la rédaction de textes, bien que ces réponses ne puissent pas être cumulées dans les choix proposés.
Analyse Critique
Une analyse plus approfondie révèle que les enseignants peinent à percevoir les bénéfices de l'IA pour l'apprentissage, contrairement aux étudiants. La question de savoir si l'IA améliore les notes sans développer les compétences reste débattue. Est-ce un dopage académique ou une opportunité pour un apprentissage plus efficace ?
Acceptabilité et Éthique
L'enquête révèle que beaucoup d'étudiants jugent acceptable d'utiliser l'IA pour rédiger leurs devoirs, et même un quart des enseignants partagent cet avis. Cela pose des questions éthiques cruciales : copier-coller est-il tricher ? Utiliser l'IA sous supervision ou pour des traductions est-il acceptable ? La réponse n'est pas simple et nécessite un débat ouvert.
Propositions et Solutions
Pour encadrer ces usages, plusieurs solutions sont proposées. Plutôt que d'interdire l'IA, il est suggéré de fixer des règles pour une utilisation responsable. Des innovations pédagogiques peuvent également être explorées, comme la création de situations de concurrence professionnelle ou l'utilisation de détecteurs d'IA.
Conclusion
En conclusion, bien que l'étude présente des limites, elle souligne un besoin urgent de régulation. Une charte institutionnelle pourrait fournir un cadre pour une utilisation éthique.
PRESENTATION DE L'ACTIVE DIRECTORY SOUS WINDOWS SERVEUR.pptx
Active Directory est le service d'annuaire développé par Microsoft pour la gestion des identités et des accès dans les environnements Windows
MongoDB in a scale-up: how to get away from a monolithic hell — MongoDB Paris...
This is the slide deck of a talk by Alexis "Horgix" Chotard and Laurentiu Capatina presented at the MongoDB Paris User Group in June 2024 about the feedback on how PayFit move away from a monolithic hell of a self-hosted MongoDB cluster to managed alternatives. Pitch below.
March 15, 2023, 6:59 AM: a MongoDB cluster collapses. Tough luck, this cluster contains 95% of user data and is absolutely vital for even minimal operation of our application. To worsen matters, this cluster is 7 years behind on versions, is not scalable, and barely observable. Furthermore, even the data model would quickly raise eyebrows: applications communicating with each other by reading/writing in the same MongoDB documents, documents reaching the maximum limit of 16MiB with hundreds of levels of nesting, and so forth. The incident will last several days and result in the loss of many users. We've seen better scenarios.
Let's explore how PayFit found itself in this hellish situation and, more importantly, how we managed to overcome it!
On the agenda: technical stabilization, untangling data models, breaking apart a Single Point of Failure (SPOF) into several elements with a more restricted blast radius, transitioning to managed services, improving internal accesses, regaining control over risky operations, and ultimately, approaching a technical migration when it impacts all development teams.
Le support de présentation des Signaux 2024
Découvrez le support de présentation des Signaux 2024, la conférence des grandes tendances de l'innovation et du numérique.
Le Comptoir OCTO - Qu’apporte l’analyse de cycle de vie lors d’un audit d’éco...
Par Nicolas Bordier (Consultant numérique responsable @OCTO Technology) et Alaric Rougnon-Glasson (Sustainable Tech Consultant @OCTO Technology)
Sur un exemple très concret d’audit d’éco-conception de l’outil de bilan carbone C’Bilan développé par ICDC (Caisse des dépôts et consignations) nous allons expliquer en quoi l’ACV (analyse de cycle de vie) a été déterminante pour identifier les pistes d’actions pour réduire jusqu'à 82% de l’empreinte environnementale du service.
Vidéo Youtube : https://www.youtube.com/watch?v=7R8oL2P_DkU
Compte-rendu :
Dernier (7)
Ouvrez la porte ou prenez un mur (Agile Tour Genève 2024)
Ouvrez la porte ou prenez un mur (Agile Tour Genève 2024)
De l'IA comme plagiat à la rédaction d'une « charte IA » à l'université
De l'IA comme plagiat à la rédaction d'une « charte IA » à l'université
PRESENTATION DE L'ACTIVE DIRECTORY SOUS WINDOWS SERVEUR.pptx
PRESENTATION DE L'ACTIVE DIRECTORY SOUS WINDOWS SERVEUR.pptx
MongoDB in a scale-up: how to get away from a monolithic hell — MongoDB Paris...
MongoDB in a scale-up: how to get away from a monolithic hell — MongoDB Paris...
Le Comptoir OCTO - Qu’apporte l’analyse de cycle de vie lors d’un audit d’éco...
Le Comptoir OCTO - Qu’apporte l’analyse de cycle de vie lors d’un audit d’éco...
La Dilution D’Une Solution
- 1. La dilution d’une solution p320 “Chimie 11” On peut préparer des solutions de concentration spécifique en diluant des solutions concentrées.