Xem 1-18 trên 18 kết quả Thermal radiation
  • Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Tailoring photonic metamaterial resonances for thermal radiation

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  • Heat transfer is a fundamental part of thermal engineering. It is the science of the rules governing the transfer of heat between systems of different temperatures. In thermodynamics, the heat transferred from one system to its surroundings is assumed as a given process parameter. This assumption does not give any information on how the heat is transferred and which rules determine the quantity of the transferred heat. Heat transfer describes the dependencies of the heat transfer rate from a corresponding temperature difference and other physical conditions....

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  • ADC’s latest addition to its family of outside plant products, the Radiator II Above Ground HDSLx Repeater Housing, is a highly cost- effective outside plant enclosure for local loop electronics. With its advanced thermal management capabilities, the Radiator II extends the life of enclosed cards or repeaters and reduces costly truck rolls and maintenance. Radial placement of modular card cages permits efficient and predictable thermal transfer for uniform cooling. In addition, its unique design allows the heat to radiate externally, increasing the reliability of the enclosed electronics....

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  • Heat transfer has emerged as a central discipline in contemporary engineering science. The research activity of a few decades ago—the material reviewed in the first handbooks—has distilled itself into textbook concepts and results. Heat transfer has become not only a self-standing discipline in the current literature and engineering curricula, but also an indispensable discipline at the interface with other pivotal and older disciplines.

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  • The book contains fundamentals of solar radiation, its ecological impacts, applications, especially in agriculture, architecture, thermal and electric energy. Chapters are written by numerous experienced scientists in the field from various parts of the world. Apart from chapter one which is the introductory chapter of the book, that gives a general topic insight of the book, there are 24 more chapters that cover various fields of solar radiation.

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  • Physical measurement dimensions, such as temperature or pressure and tensile forces, can affect glass fibres and locally change the characteristics of light transmission in the fibre. As a result of the damping of the light in the quartz glass fibres through scattering, the location of an external physical effect can be determined so that the optical fibre can be employed as a linear sensor. Light scattering, also known as Raman scattering, occurs in the optical fibre.

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  • The radiation of the sun in which the planet is incessantly plunged, penetrates the air, the earth, and the waters; its elements are divided, change direction in every way, and, penetrating the mass of the globe, would raise its temperature more and more, if the heat acquired were not exactly balanced by that which escapes in rays from all points of the surface and expands through the sky.

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  • ADC’s latest addition to its family of outside plant products, the Radiator II Below Ground HDSLx Repeater Housing, is a highly costeffective outside plant enclosure for local loop electronics. With its advanced thermal management capabilities, the Radiator II extends the life of enclosed cards or repeaters and reduces costly truck rolls and maintenance. Radial placement of modular card cages permits efficient and predictable thermal transfer for uniform cooling. In addition, its unique design allows the heat to radiate externally, increasing the reliability of the enclosed electronics....

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  • Temperature Measurement of Transparent Solid Bodies Pyrometric, Contactless Method All solid bodies which partially or totally transmit thermal radiation in the wavelength of visible and infrared radiation, are classified as transparent bodies . The notation used to consider pyrometric methods for measuring the surface temperature of solid bodies has already been introduced in Section 8.2. It will be recalled that solid bodies, which have a transmission factor limited to a = 0, are non-transparent bodies in the whole range of wavelengths used in optical pyrometry .

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  • Prof. Dr. David Jou Universitat Autònoma de Barcelona Dept. Fisica - Edifici Cc Grup Fisica Estadistica Bellaterra 08193 Catalonia, Spain David.Jou@uab.es Prof. Dr. Georgy Lebon Université de Liège Dept. d’Astrophysique G´ ophysique et Oc´ anographie e e B5 Sart Tilman Liege 4000 Belgium g.lebon@ulg.ac.be Prof. Dr. José Casas-Vázquez Universitat Autònoma de Barcelona Dept. Fisica - Edifici Cc Grup Fisica Estadistica Bellaterra 08193 Catalonia, Spain Jose.Casas@uab.es Cover image: Thermal radiation leaving the Earth, seen by the EOS-Terra satellite (NASA). Image from www.

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  • Enormous number of books, reviews and original papers concerning engineering applications of heat transfer has already been published and numerous new publications appear every year due to exceptionally wide list of objects and processes that require to be considered with a view to thermal energy redistribution. All the three mechanisms of heat transfer (conduction, convection and radiation) contribute to energy redistribution, however frequently the dominant mechanism can be singled out.

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  • The Nondestructive testing science is a broad field that covers variety of testing methods and applications, in addition to the associated pre and post processing mathematics. In terms of methods and techniques the Nondestructive testing modalities rely on different physical phenomena such as the electromagnetism, the acoustic emission, the thermal emission and the penetration of high-energy radiation through materials and structures.

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  • During the last years, spectacular progress has been made in all aspects of heat transfer. Heat transfer is a branch of engineering science and technology that deals with the analysis of the rate of transfer thermal energy. Its fundamental modes are conduction, convection, radiation, convection vs. conduction and mass transfer. It has a broad application to many diff erent branches of science, technology and industry, ranging from biological, medical and chemical systems, to common practice of thermal engineering (e.g.

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  • CHAPTER 4 3 HEAT TRANSFER FUNDAMENTALS G. P. "Bud" Peterson Executive Associate Dean and Associate Vice Chancellor of Engineering Texas A&M University College Station, Texas 43.1 SYMBOLS AND UNITS 1 6 3 7 1400 43.2 CONDUCTION HEAT TRANSFER 1 6 3 9 43.4 RADIATION HEAT TRANSFER 1 0 4 0 43.2.1 Thermal Conductivity 1 7 3 0 43.4.1 Black-Body Radiation 1 0 4 0 43.2.2 One-Dimensional Steady43.4.2 Radiation Properties 1 0 4 4 State Heat Conduction 1375 43.4.3 Configuration Factor 1 0 4 7 43.2.3 Two-Dimensional Steady43 A A Radiative Exchange State Heat Conduction 1377 among Diffuse-Gray 43.2.

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  • Greenhouse gases, such as carbon dioxide, nitrous oxide, methane, and ozone, play an important role in balancing the temperature of the Earth’s surface by absorbing and emitting radiation within the thermal infrared range from the source. However, with the enormous burning of fossil fuels from the industrial revolution, the concentration of greenhouse gases in the atmosphere has greatly increased.

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  • Solar energy refers primarily to the use of solar radiation for practical ends. However, all renewable energies, other than geothermal and tidal, derive their energy from the sun. Solar technologies are broadly characterized as either passive or active depending on the way they capture, convert and distribute sunlight. Active solar techniques use photovoltaic panels, pumps, and fans to convert sunlight into useful outputs.

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  • Table 38-2 Esophageal Dysphagia Esophageal Mechanical Dysphagia I. Wall defects A. Congenital B. Tracheoesophageal fistula II. Intrinsic narrowing A. Inflammatory esophagitis 1. Viral (herpes simplex, varicella-zoster, cytomegalovirus) 2. Bacterial 3. Fungal (Candida) 4. Mucocutaneous bullous diseases 5. Caustic, chemical, thermal injury 6. Eosinophilic esophagitis B. Webs and rings 1. Esophageal (congenital, inflammatory) 2. Lower esophageal mucosal ring (Schatzki's ring) 3. Eosinophilic esophagitis 4. Host-versus-graft disease, mucocutaneous disorders C.

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  • Lecture Sensors and analytical devices: Temperature measurement include all of the following: Thermoelectric effect sensors (thermocouples), varying resistance devices, semiconductor devices, radiation thermometers, thermography (thermal imaging), thermal expansion methods, quartz thermometers, fiber – optic temperature sensors,...

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