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HTML

Sébastien Merour
publié le 13/06/2020 à 15h46 | modifé le 13/06/2020 à 19h00
Catégorie : LangagesCommentaires (16487)
HTML
Description

HTML signifie : Hypertext Markup Language

Le langage HTML est constitué :

- de balises (tags en anglais)

- d'attributs (attributes)

- d'éléments (ce qui se trouve entre la balise ouvrante < et la balise fermante >).

Structure d'une page Web

Une page HTML est constituée au minimum :

- du doctype (pour indiquer au navigateur que le document est de type HTML)

- des balises qui elles-mêmen renferment 2 autres balises : et : ces 3 balises  sont les balises de premier niveau.

La section Head

La balise head renferme plusieurs balises qui sont interprétées par le navigateur, mais dont le contenu n'est pas affiché sur la page.

La section Head contient de nombreuses balises, parmi lesquelles nous trouvons : l'encodage de la page (le plus souvent UTF-8), le titre de la page (balise title) . On y trouve également des balises meta, des liens vers des feuilles de style CSS, et parfois des scripts en Javascript.

Les différentes balises meta et title jouent un rôle primordial pour le référencement.

La section Body

Elle contient au contraire tout ce qui sera affiché sur la page web dans le navigateur. Il existe de nombreux types de balises :

- les balises sectionnantes (permettant de diviser la page en plusieurs sections, comme header, nav, section, footer, article. Elles sont primordiales car elles donnent des indicationx aux moteurs de recherche qui parcourent les pages web).

- les balises de structuration du texte (comme les headings, les blockquotes, les paragraphes)

- les balises de listes (numérotées ou non)

- les balises de tableau (désormais déconseillées pour construire une page web, mais parfois très utiles pour construire le template d'une newsletter)

- les balises de formulaire (form, input, textarea...)

- les balises génériques (div, span...)

Mode d'affichage des éléments HTML

Il existe également une autre façon de distinguer certains types de balises.

On parle parfois en effet de :

- balises "inline" qui permettent de définir l'affichage d'un élément sans retour à la ligne. Parmi les balises inline, nous avons par exemple les balises  span, a, strong, img ...

- balises "blocks": elles occupent toute la largeur disponibles. Lorsque 2 éléments de type "blocks" se suivent, ils sont disposés par défaut l'un en dessous de l'autre. Nous avons par exemple les balises div, h1, p, ul, form, table, blockquote.

-de balises "invisibles" : elles ne s'affichent pas sur la page, comme par exemple la balise meta, inclue dans la partie head de la page.

Fonctionnalités
HTML permet d'écrire de l'hypertexte. Il permet de structurer sémantiquement et logiquement le contenu des pages web, mais aussi d'inclure des éléments multimédia tels que des images ou des vidéos.
Année de création
1992
Créateur
Web Hypertext Application Technology Working Group
Dernière version
5.2
Langage
HTML
Liens
Aux dernières nouvelles
Actuellement, la dernière version du HTML est le HTML 5. Mais les membres du groupe de travail du W3C veulent créer un HTML Living Standard, une version du HTML qui n'aurait pas de numéro de version. Ainsi le HTML serait en constante évolution.

16487 Commentaire(s)
  1. user
    Charlesjobby
    17/06/2025 à 16h17  commentaire modifé
    Balanset-1A: Cutting-edge Portable Balancer & Vibration Analyzer Next-generation Dynamic Balancing Solution Balanset-1A represents an groundbreaking solution for vibration correction of rotors in their own bearings, developed by Estonian company Vibromera OU. The device ensures professional equipment balancing at €1,751, which is 3-10 times more affordable than traditional vibration analyzers while preserving exceptional measurement accuracy. The system allows field balancing directly at the equipment's working position without requiring removal, which is vital for minimizing production downtime. About the Manufacturer Vibromera OU is an Estonian company specializing in the development and manufacturing of equipment for technical diagnostics of industrial equipment. The company is established in Estonia (registration number 14317077) and has offices in Portugal. Contact Information: Official website: https://vibromera.eu/shop/2/ Technical Specifications Detection Parameters Balanset-1A ensures accurate measurements using a twin-channel vibration analysis system. The device measures RMS vibration velocity in the range of 0-80 mm/s with an accuracy of ±(0.1 + 0.1?Vi) mm/s. The operating frequency range is 5-550 Hz with optional extension to 1000 Hz. The system supports rotational speed measurement from 250 to 90,000 RPM with phase angle determination accuracy of ±1 degree. Working Principle The device uses phase-sensitive vibration measurement technology with MEMS accelerometers ADXL335 and laser tachometry. Two uniaxial accelerometers measure mechanical vibrations proportional to acceleration, while a laser tachometer generates pulse signals for determining rotational speed and phase angle. Digital signal processing includes FFT analysis for frequency analysis and specialized algorithms for automatic computation of balancing masses. Full Kit Components The standard Balanset-1A delivery includes: Measurement unit with USB interface - main module with built-in preamplifiers, integrators, and ADC 2 vibration sensors (accelerometers) with 4m cables (optionally 10m) Optical sensor (laser tachometer) with 50-500mm measuring distance Magnetic stand for sensor mounting Electronic scales for precise measurement of corrective masses Software for Windows 7-11 (32/64-bit) Plastic transport case Complete set of cables and documentation Operating Capabilities Vibrometer Mode Balanset-1A functions as a complete vibration analyzer with capabilities for measuring overall vibration level, FFT spectrum analysis up to 1000 Hz, calculating amplitude and phase of the fundamental frequency (1x), and continuous data recording. The system delivers visualization of time signals and spectral analysis for equipment condition diagnostics. Balancing Mode The device supports one-plane (static) and dual-plane (dynamic) balancing with automatic calculation of correction masses and their installation angles. The unique influence coefficient saving function enables substantial acceleration of repeat balancing of similar equipment. A specialized grinding wheel balancing mode uses the three-correction-weight method. Software The intuitive program interface delivers step-by-step guidance through the balancing process, making the device usable to personnel without specific training. Key functions include: Automatic tolerance calculation per ISO 1940 Polar diagrams for imbalance visualization Result archiving with report generation capability Metric and imperial system support Multilingual interface (English, German, French, Polish, Russian) Application Areas and Equipment Types Industrial Equipment Balanset-1A is effectively used for balancing fans (centrifugal, axial), pumps (hydraulic, centrifugal), turbines (steam, gas), centrifuges, compressors, and electric motors. In production facilities, the device is used for balancing grinding wheels, machine spindles, and drive shafts. Agricultural Machinery The device provides particular value for agriculture, where uninterrupted operation during season is essential. Balanset-1A is applied for balancing combine threshing drums, shredders, mulchers, mowers, and augers. The ability to balance on-site without equipment disassembly permits eliminating costly downtime during critical harvest periods. Specialized Equipment The device is effectively used for balancing crushers of various types, turbochargers, drone propellers, and other high-speed equipment. The rotation frequency range from 250 to 90,000 RPM covers virtually all types of industrial equipment. Benefits Over Competitors Economic Value At a price of €1,751, Balanset-1A offers the functionality of devices costing €10,000-25,000. The investment breaks even after preventing just 2-3 bearing failures. Cost reduction on outsourced balancing specialist services reaches thousands of euros annually. Ease of Use Unlike complex vibration analyzers requiring months of training, mastering Balanset-1A takes 3-4 hours. The step-by-step guide in the software allows professional balancing by personnel without specialized vibration diagnostics training. Mobility and Independence The complete kit weighs only 4 kg, with power supplied through the laptop's USB port. This allows balancing in field conditions, at distant sites, and in hard-to-reach locations without external power supply. Versatile Application One device is adequate for balancing the broadest spectrum of equipment - from small electric motors to large industrial fans and turbines. Support for one and two-plane balancing covers all standard tasks. Real Application Results Drone Propeller Balancing A user achieved vibration reduction from 0.74 mm/s to 0.014 mm/s - a 50-fold improvement. This demonstrates the outstanding accuracy of the device even on small rotors. Shopping Center Ventilation Systems Engineers successfully balanced radial fans, achieving reduced energy consumption, removed excessive noise, and prolonged equipment lifespan. Energy savings recovered the device cost within several months. Agricultural Equipment Farmers note that Balanset-1A has become an vital tool preventing costly breakdowns during peak season. Reduced vibration of threshing drums led to decreased fuel consumption and bearing wear. Investment and Delivery Terms Current Prices Complete Balanset-1A Kit: €1,751 OEM Kit (without case, stand, and scales): €1,561 Special Offer: €50 discount for newsletter subscribers Volume Discounts: up to 15% for orders of 4+ units Ordering Options Official Website: vibromera.eu (recommended) eBay: verified sellers with 100% rating Industrial Distributors: through B2B channels Payment and Shipping Terms Payment Methods: PayPal, bank cards, bank transfer Shipping: 10-20 business days by international mail Shipping Cost: from $10 (economy) to $95 (express) Warranty: factory warranty Technical Support: included in price Final Assessment Balanset-1A represents an perfect solution for organizations striving to implement an successful equipment balancing system without significant capital expenditure. The device makes accessible access to professional balancing, allowing small businesses and service centers to offer services at the level of large industrial companies. The blend of affordable price, ease of use, and professional features makes Balanset-1A an indispensable tool for modern technical maintenance. Investment in this device is an investment in equipment dependability, reduced operating costs, and enhanced competitiveness of your company.

  2. user
    Prokarniz
    17/06/2025 à 15h29  commentaire modifé
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  4. user
    Charlesjobby
    17/06/2025 à 10h20  commentaire modifé
    Key Use Cases Balanset-1A dual-channel portable balancer is designed for precision correction of imbalance and vibration analysis in industrial environments . The system is used for: vibration analysis and balancing on running machines without disassembly , reducing downtime and improving reliability , supporting predictive maintenance programs . This instrument is the perfect solution for preventive and corrective balancing in any production facility, utility, or workshop environment . Device Description The supplied equipment includes: a two-channel measurement unit , a pair of industrial accelerometers , a laser tachometer (phase sensor) , robust mounting accessories , electronic digital scales , licensed Vibromera balancing software for Windows , heavy-duty carry case for all components . All you need for operation is any notebook running Windows OS . Key Advantages Vibrometer Mode: Integrated FFT spectral analysis . Balancing Mode: Influence coefficient saving and reuse . Advanced Functions: Support for custom influence coefficients . Investment Balanset-1A — EUR 1751 Product page: https://vibromera.eu/product/balanset-1/ Included in Delivery Dual-channel measurement unit 2 vibration sensors (accelerometers) Laser tachometer (phase sensor) with reflective tape Magnetic holder Electronic scales Balancing software (USB flash drive) Sturdy transport case Delivery and Payment Worldwide delivery: CTT Standard (Portugal Post): EUR 36, 7–30 days, https://www.ctt.pt/ EMS Express Mail Service: EUR 250, 4–10 days, https://www.ems.post/ Payment options: Bank transfer Credit/Debit card PayPal After-Sales Service 1-year warranty: covers any manufacturing defects, with repair or replacement at no extra charge . Extended technical support (subscription-based): Direct WhatsApp chat with experts, photo/video troubleshooting, remote software and hardware setup guidance, vibration data interpretation, tailored recommendations for your equipment. Subscribe: https://vibromera.eu/pricing-all/ Request a Consultation Website: https://vibromera.eu/shop/2/

  5. user
    Charlesjobby
    17/06/2025 à 03h17  commentaire modifé
    Balanset-1A: Revolutionary Mobile Balancer & Vibration Analyzer High-precision Dynamic Balancing Solution Balanset-1A stands as an innovative solution for vibration correction of rotors in their own bearings, developed by Estonian company Vibromera OU. The device provides professional equipment balancing at €1,751, which is significantly cheaper than traditional vibration analyzers while retaining superior measurement accuracy. The system enables on-site balancing directly at the equipment's installation site without requiring dismantling, which is critically important for preventing production downtime. About the Manufacturer Vibromera OU is an Estonian company concentrating in the design and manufacturing of equipment for technical diagnostics of industrial equipment. The company is established in Estonia (registration number 14317077) and has representatives in Portugal. Contact Information: Official website: https://vibromera.eu/shop/2/ Technical Specifications Detection Parameters Balanset-1A provides high-precision measurements using a dual-channel vibration analysis system. The device measures RMS vibration velocity in the range of 0-80 mm/s with an accuracy of ±(0.1 + 0.1?Vi) mm/s. The working frequency range is 5-550 Hz with possible extension to 1000 Hz. The system supports rotation frequency measurement from 250 to 90,000 RPM with phase angle determination accuracy of ±1 degree. Working Principle The device uses phase-sensitive vibration measurement technology with MEMS accelerometers ADXL335 and laser tachometry. Two single-axis accelerometers measure mechanical vibrations proportional to acceleration, while a laser tachometer generates pulse signals for calculating RPM and phase angle. Digital signal processing includes FFT analysis for frequency analysis and specialized algorithms for automatic computation of balancing masses. Full Kit Contents The standard Balanset-1A delivery includes: Measurement unit with USB interface - primary module with embedded preamplifiers, integrators, and ADC 2 vibration sensors (accelerometers) with 4m cables (optionally 10m) Optical sensor (laser tachometer) with 50-500mm measuring distance Magnetic stand for sensor mounting Electronic scales for precise measurement of corrective masses Software for Windows 7-11 (32/64-bit) Plastic transport case Complete set of cables and documentation Functional Capabilities Vibrometer Mode Balanset-1A functions as a complete vibration analyzer with features for measuring overall vibration level, FFT spectrum analysis up to 1000 Hz, measuring amplitude and phase of the fundamental frequency (1x), and continuous data recording. The system delivers visualization of time signals and spectral analysis for equipment condition diagnostics. Balancing Mode The device supports one-plane (static) and two-plane (dynamic) balancing with automatic calculation of correction masses and their installation angles. The unique influence coefficient saving function allows significant acceleration of subsequent balancing of same-type equipment. A dedicated grinding wheel balancing mode uses the three-correction-weight method. Software The easy-to-use program interface offers step-by-step guidance through the balancing process, making the device accessible to personnel without special training. Key functions include: Automatic tolerance calculation per ISO 1940 Polar diagrams for imbalance visualization Result archiving with report generation capability Metric and imperial system support Multilingual interface (English, German, French, Polish, Russian) Application Areas and Equipment Types Industrial Equipment Balanset-1A is effectively applied for balancing fans (centrifugal, axial), pumps (hydraulic, centrifugal), turbines (steam, gas), centrifuges, compressors, and electric motors. In production facilities, the device is used for balancing grinding wheels, machine spindles, and drive shafts. Agricultural Machinery The device represents exceptional value for agriculture, where reliable operation during season is vital. Balanset-1A is applied for balancing combine threshing drums, shredders, mulchers, mowers, and augers. The ability to balance on-site without equipment disassembly enables preventing costly downtime during critical harvest periods. Specialized Equipment The device is successfully used for balancing crushers of various types, turbochargers, drone propellers, and other high-speed equipment. The rotation frequency range from 250 to 90,000 RPM covers practically all types of industrial equipment. Superiority Over Alternatives Economic Efficiency At a price of €1,751, Balanset-1A provides the functionality of devices costing €10,000-25,000. The investment recovers costs after preventing just 2-3 bearing failures. Savings on external balancing specialist services totals thousands of euros annually. Ease of Use Unlike complex vibration analyzers requiring months of training, mastering Balanset-1A takes 3-4 hours. The step-by-step guide in the software permits professional balancing by personnel without specific vibration diagnostics training. Portability and Independence The complete kit weighs only 4 kg, with power supplied through the laptop's USB port. This allows balancing in field conditions, at distant sites, and in difficult-access locations without external power supply. Versatile Application One device is suitable for balancing the broadest spectrum of equipment - from small electric motors to large industrial fans and turbines. Support for single and dual-plane balancing covers all common tasks. Real Application Results Drone Propeller Balancing A user achieved vibration reduction from 0.74 mm/s to 0.014 mm/s - a 50-fold improvement. This demonstrates the outstanding accuracy of the device even on small rotors. Shopping Center Ventilation Systems Engineers effectively balanced radial fans, achieving decreased energy consumption, eliminated excessive noise, and prolonged equipment lifespan. Energy savings paid for the device cost within several months. Agricultural Equipment Farmers note that Balanset-1A has become an indispensable tool preventing costly breakdowns during peak season. Reduced vibration of threshing drums led to lower fuel consumption and bearing wear. Pricing and Delivery Terms Current Prices Complete Balanset-1A Kit: €1,751 OEM Kit (without case, stand, and scales): €1,561 Special Offer: €50 discount for newsletter subscribers Wholesale Discounts: up to 15% for orders of 4+ units Purchase Options Official Website: vibromera.eu (recommended) eBay: certified sellers with 100% rating Industrial Distributors: through B2B channels Payment and Shipping Terms Payment Methods: PayPal, credit cards, bank transfer Shipping: 10-20 business days by international mail Shipping Cost: from $10 (economy) to $95 (express) Warranty: manufacturer's warranty Technical Support: included in price Conclusion Balanset-1A represents an ideal solution for organizations striving to deploy an successful equipment balancing system without major capital expenditure. The device democratizes access to professional balancing, permitting small companies and service centers to deliver services at the level of large industrial companies. The blend of reasonable price, ease of use, and professional functionality makes Balanset-1A an essential tool for modern technical maintenance. Investment in this device is an investment in equipment stability, lower operating costs, and increased competitiveness of your company.

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