Xem 1-20 trên 749 kết quả Emission
  • Essential for students, science and medical graduates who want to understand the basic science of Positron Emission Tomography (PET), this book describes the physics, chemistry, technology and overview of the clinical uses behind the science of PET and the imaging techniques it uses. In recent years, PET has moved from high-end research imaging tool used by the highly specialized to an essential component of clinical evaluation in the clinic, especially in cancer management.

    pdf381p famvandao 13-04-2012 67 21   Download

  • There are two main reasons why the chemical process industry should be motivated to reduce energy consumption and CO 2 emissions: rising concerns in companies, the public and scientifi c community about climate change or global warming, and the increasing fraction of energy in manufacturing costs. ‘ Climate change ’ [1] in this context, means a change of climate, which is attributed directly or indirectly to human activity that alters the composition of the global atmosphere and which is in addition to natural climate variability observed over comparable time periods....

    pdf485p aries23 29-09-2012 37 17   Download

  • This chapter presents the basic theory and characteristics of stimulated emission and optical amplification gain in semiconductors. The former is the mostimportant principlethat enablessemiconductorlaserstobeimplemented, and the latter is the most important parameter for analysis of the laser performances. First, stimulated emission in semiconductors is explained, and then quantum theory analysis and statistic analysis using the density matrix of the optical amplification gain are given.

    pdf44p vuongpm 16-05-2010 66 11   Download

  • Acoustic emission (AE) is a phenomenon in which elastic or stress waves are emitted from rapid, localized change of strain energy in material. The practical application of the AE first emerged in the 1950's, but only in the last 20 years the science, technology and applications of AE have progressed significantly.

    pdf230p lyly_5 22-03-2013 24 6   Download

  • Founded in 1968, was part of Foster Wheeler until 1989. Now subsidiary of DuPont. Located in Parsippany, New Jersey Employing about 65 people Worldwide Supplier of Technologies for Controls of Particulate, SOX and NOX emissions. Specializing in reduction of Oil Refinery Emissions. More systems installed and operating than ALL other competitors “COMBINED” Offering a wide range of solutions to better serve our customers Certified ISO 9001-2000

    pdf47p chatraqn 13-12-2012 19 4   Download

  • This document is one of several white papers that summarize readily available information on control techniques and measures to mitigate greenhouse gas (GHG) emissions from specific industrial sectors.

    pdf62p loixinloi 08-05-2013 31 4   Download

  • To engage communities, particularly environmental justice communities, communities in a dialog about the development of this rulemaking early in the process Part of EPA’s overall outreach strategy to stakeholders Builds on EPA’s earlier Clean Air Act 101 webinar for EPA s communities Rulemaking combines several regulatory programs including programs that look at risk and those that don’t ► ► .

    pdf52p chatraqn 13-12-2012 15 3   Download

  • Indoor air quality problems resulting from the emission of volatile organic compounds have become an issue of increasing concern. Emissions from building and furnishing materials, which are frequently constructed from particleboard and medium density fiberboard, are a potentially important contributor of indoor VOCs. In this research, VOC emissions from particleboard and MDF were measured in small stainless steel chambers for 4 days. Samples were collected from 53 of the 61 U.S. mills that produce particleboard and MDF.

    pdf8p thanhtoyz 17-10-2015 13 2   Download

  • During the past several decades, air quality in homes and office buildings has become a matter of increasing concern. Indoor air concentrations of volatile organic compounds are often significantly higher than outside due to VOC emissions from building materials, furnishings, and occupant’s activities. This problem was exacerbated following the energy crisis in the 1970s as homeowners and builders improved the energy efficiency of their buildings by decreasing air exchange rates.

    pdf8p thanhtoyz 17-10-2015 7 2   Download

  • In 2003 we published Positron Emission Tomography: Basic Science and Clinical Practice. The aim of that book was to address what we perceived of as a lack, at the time, of a comprehensive contemporary reference work on the rapidly expanding area of positron emission imaging. The scope was intentionally wide. The original proposal for a 350 page book turned into a nearly 900 page volume.

    pdf381p gian_anh 18-10-2012 22 1   Download

  • Refinery Process Air Emissions The most significant air emission sources in oil refineries are catalytic or thermal cracking units, catalytic reformer units, sulfur recovery plants, storage vessels, fluid coking units wastewater streams, cooling towers, equipment leaks, blowdown systems, vacuum distillation units, steam boilers, process furnaces, process heaters, compressor engines, barge or ship loading and gasoline loading racks specifically located at petroleum refineries.

    pdf10p chatraqn 13-12-2012 18 1   Download

  • The cement industry contributes about 5% to global anthropogenic CO2 emissions, making the cement industry an important sector for CO2-emission mitigation strategies. CO2 is emitted from the calcination process of limestone, from combustion of fuels in the kiln, as well as from power generation. In this paper, we review the total CO2 emissions from cement making, including process and energyrelated emissions. Currently, most available data only includes the process emissions. We also discuss CO2 emission mitigation options for the cement industry....

    pdf28p hailedangbs 02-05-2013 23 1   Download

  • This 1993 document entitled "Assessment of Sources of Air, Water, and Land Pollution: A Guide to Rapid Source Inventory Techniques" provides techniques for conducting source inventories in Chapter 2 and describes models for estimating air emissions under current controls in Chapter 3. Appendix II includes the United Nations (UN) classification of industries and services.

    pdf230p anhthaopro 13-04-2011 335 88   Download

  • The author gratefully acknowledges the U.S. Department of Energy, Office of Industrial Technology, Steam System BestPractices Program for sponsoring the development of this guide. Special thanks are extended to Fred Hart and Bob Gemmer of DOE for their support and guidance.

    pdf173p lovecafe2 17-09-2011 53 22   Download

  • The papers in this volume explore the key issues linked to this shift, including: ' Increasing research into the Earth Sciences, climate reconstruction and forecasting in order to decrease the degree of uncertainty about the origin, development and implications of climate change; ' The introduction of more binding and comprehensive regulation of both greenhouse gas emissions and adaptation measures, like that in the United Kingdom; ' Matching climate policy with that for disasters and mainstreaming it into overall development strategies.

    pdf79p ktct_1669 08-05-2012 57 22   Download

  • The use of biodiesel worldwide is becoming increasingly important, because of the widespread shortage of oil resources, which has raised the prices of fossil fuels. This biofuel also offers an opportunity to meet the energy demands with less impact to the environment due its renewable characteristics. This book entitled "Biodiesel – Quality, Emissions and By-Products" comprises 20 chapters and covers topics related to biodiesel quality, performance of combustion engines that use biodiesel, and the emissions they generate.

    pdf0p ktcn_1 10-07-2012 42 15   Download

  • Diesel engines, also known as CI engines, possess a wide field of applications as energy converters because of their higher efficiency. However, diesel engines are a major source of NOX and particulate matter (PM) emissions. Because of its importance, five chapters in this book have been devoted to the formulation and control of these pollutants. The world is currently experiencing an oil crisis. Gaseous fuels like natural gas, pure hydrogen gas, biomass-based and coke-based syngas can be considered as alternative fuels for diesel engines.

    pdf278p bunmang_1 03-05-2013 60 11   Download

  • A new type of semiconductor laser is studied, in which injected carriers in the active region are quantum mechanically confined in localized finite self-assembled wire-like quantumdash (Qdash) structures that are varied in sizes and compositions. Effects of such carrier distribution and quasi three-dimensional density of states contribute to a quasisupercontinuum interband lasing characteristics, which is a new laser design platform as compared to continuous broad emission spectrum generated by nonlinear media pumped with ultrashort laser pulse....

    pdf364p 123859674 30-06-2012 31 10   Download

  • Sound emission (AE) is one of the most important test non-destructive (NDT) methods of materials, construction and machinery. The sound emission method with most other technical non-destructive testing in two important respects. first of all, the signal source is always located inside the investigated materials / structures. The second important thing is the NDT method to detect geometrical discontinuities, while emission sound motion detection errors.

    pdf408p lulanphuong 27-03-2012 40 9   Download

  • Consider the spontaneous emission term describing the contribution of the spontaneous emission to the laser oscillation, which appears as the final term on the right-hand side of the rate equation for the photon density (Eq. (6.21)). Since this term represents the component of the spontaneous emission belonging to the same mode as the laser oscillation (angular frequency !m), it is closely related to the gain for the oscillation mode. Consider a laser of index-guiding type, and let E ¼ E(r) ¼ E(x, y)E(z) be the complex electric field of the oscillation mode. ...

    pdf3p vuongpm 16-05-2010 58 8   Download

Đồng bộ tài khoản