The Experts below are selected from a list of 282 Experts worldwide ranked by ideXlab platform

Min Qiu - One of the best experts on this subject based on the ideXlab platform.

  • Dynamic Thermal Emission Control Based on Ultrathin Plasmonic Metamaterials Including Phase‐Changing Material GST
    Laser & Photonics Reviews, 2017
    Co-Authors: Lu Cai, Min Qiu
    Abstract:

    Dynamic thermal Emission Control has attracted growing interest in a broad range of fields, including radiative cooling, thermophotovoltaics and adaptive camouflage. Previous demonstrations of dynamic thermal Emission Control present disadvantages of either large thickness or requiring sustained electrical or thermal excitations. In this paper, an ultrathin (∼0.023λ, λ is the Emission peak wavelength) metal-insulator-metal plasmonic metamaterial-based zero-static-power mid-infrared thermal emitter incorporating phase-changing material GST is experimentally demonstrated to dynamically Control the thermal Emission. The electromagnetic modes can be continuously tuned through the intermediate phases determined by Controlling the temperature. A typical resonance mode, which involves the coupling between the high-order magnetic resonance and anti-reflection resonance, shifts from 6.51 to 9.33 μm while GST is tuned from amorphous to crystalline phase. This demonstration will pave the way towards the dynamical thermal Emission Control in both the fundamental science field and a number of energy-harvesting applications.

  • dynamic thermal Emission Control based on ultrathin plasmonic metamaterials including phase changing material gst
    Laser & Photonics Reviews, 2017
    Co-Authors: Lu Cai, Min Qiu
    Abstract:

    Dynamic thermal Emission Control has attracted growing interest in a broad range of fields, including radiative cooling, thermophotovoltaics and adaptive camouflage. Previous demonstrations of dynamic thermal Emission Control present disadvantages of either large thickness or requiring sustained electrical or thermal excitations. In this paper, an ultrathin (∼0.023λ, λ is the Emission peak wavelength) metal-insulator-metal plasmonic metamaterial-based zero-static-power mid-infrared thermal emitter incorporating phase-changing material GST is experimentally demonstrated to dynamically Control the thermal Emission. The electromagnetic modes can be continuously tuned through the intermediate phases determined by Controlling the temperature. A typical resonance mode, which involves the coupling between the high-order magnetic resonance and anti-reflection resonance, shifts from 6.51 to 9.33 μm while GST is tuned from amorphous to crystalline phase. This demonstration will pave the way towards the dynamical thermal Emission Control in both the fundamental science field and a number of energy-harvesting applications.

Lu Cai - One of the best experts on this subject based on the ideXlab platform.

  • Dynamic Thermal Emission Control Based on Ultrathin Plasmonic Metamaterials Including Phase‐Changing Material GST
    Laser & Photonics Reviews, 2017
    Co-Authors: Lu Cai, Min Qiu
    Abstract:

    Dynamic thermal Emission Control has attracted growing interest in a broad range of fields, including radiative cooling, thermophotovoltaics and adaptive camouflage. Previous demonstrations of dynamic thermal Emission Control present disadvantages of either large thickness or requiring sustained electrical or thermal excitations. In this paper, an ultrathin (∼0.023λ, λ is the Emission peak wavelength) metal-insulator-metal plasmonic metamaterial-based zero-static-power mid-infrared thermal emitter incorporating phase-changing material GST is experimentally demonstrated to dynamically Control the thermal Emission. The electromagnetic modes can be continuously tuned through the intermediate phases determined by Controlling the temperature. A typical resonance mode, which involves the coupling between the high-order magnetic resonance and anti-reflection resonance, shifts from 6.51 to 9.33 μm while GST is tuned from amorphous to crystalline phase. This demonstration will pave the way towards the dynamical thermal Emission Control in both the fundamental science field and a number of energy-harvesting applications.

  • dynamic thermal Emission Control based on ultrathin plasmonic metamaterials including phase changing material gst
    Laser & Photonics Reviews, 2017
    Co-Authors: Lu Cai, Min Qiu
    Abstract:

    Dynamic thermal Emission Control has attracted growing interest in a broad range of fields, including radiative cooling, thermophotovoltaics and adaptive camouflage. Previous demonstrations of dynamic thermal Emission Control present disadvantages of either large thickness or requiring sustained electrical or thermal excitations. In this paper, an ultrathin (∼0.023λ, λ is the Emission peak wavelength) metal-insulator-metal plasmonic metamaterial-based zero-static-power mid-infrared thermal emitter incorporating phase-changing material GST is experimentally demonstrated to dynamically Control the thermal Emission. The electromagnetic modes can be continuously tuned through the intermediate phases determined by Controlling the temperature. A typical resonance mode, which involves the coupling between the high-order magnetic resonance and anti-reflection resonance, shifts from 6.51 to 9.33 μm while GST is tuned from amorphous to crystalline phase. This demonstration will pave the way towards the dynamical thermal Emission Control in both the fundamental science field and a number of energy-harvesting applications.

Kunnawee Kanitpong - One of the best experts on this subject based on the ideXlab platform.

  • Vehicle Emission Control Strategies and Public Opinion in Bhutan
    Transportation Research Record, 2010
    Co-Authors: Sherub Phuntsho, Kunnawee Kanitpong
    Abstract:

    Because of the increasing number of vehicles in Bhutan, vehicle Emissions have become a major cause of air pollution in the city of Thimphu. Although the Bhutanese government has implemented many strategies to Control vehicle Emissions, the strategies appear inadequate; there is still a need to explore alternative strategies for alleviating the problem. Although vehicle Emission Control strategies can be easily proposed, they are difficult to implement because they depend on public acceptance and support. A questionnaire survey of public opinion on vehicle Emission Control strategies was carried out in Thimphu City. Data from the survey have been used to analyze individual preference for vehicle Emission Control strategies and whether they can be statistically linked to socioeconomic characteristics of survey respondents. The results from this study could be helpful to policy makers for evaluating long-term plans to reduce vehicle Emissions in Thimphu City.

Jacob A. Moulijn - One of the best experts on this subject based on the ideXlab platform.

  • Diesel particulate Emission Control
    Fuel Processing Technology, 1996
    Co-Authors: John P.a. Neeft, Michiel Makkee, Jacob A. Moulijn
    Abstract:

    This paper reviews the Emission Control of particulates from diesel exhaust gases. The efficiency and exhaust Emissions of diesel engines will be compared with those of otto engines (petrol engines). The formation of particulates (or "soot"), one of the main nuisances of diesel exhaust gases, will be briefly outlined. The effects of various Emission components on human health and the environment will be described, and subsequently the Emission standards for particulates and for NOx, which have been introduced worldwide, will be summarized. Possible measures for reducing exhaust Emissions of particulates and NOx will be discussed, such as the use of alternative fuels, modifications to the engine and the use of aftertreatment devices. It will be made clear that aftertreatment devices may become necessary as diesel Emission standards become more stringent, in spite of important progress in the other fields of reducing exhaust Emissions. Selective catalytic reduction via hydrocarbons, ammonia or urea, a possible aftertreatment method for NOx Emission Control, will be discussed briefly. Filters for collecting particulates from diesel exhaust gases will be examined in more detail and aftertreatment Control systems for particulate removal will be reviewed. These can be divided into (i) non-catalytic filter based systems which use burners and electric heaters to burn the soot once it has been collected on the filter, (ii) catalytic filter-based systems which consist of filters with a catalyst coating, or filters used in combination with catalytically active precursor compounds added to the diesel fuel; and (iii) catalytic non-filter-based systems in which gaseous hydrocarbons, carbon monoxide and part of the hydrocarbon fraction of the particulates are oxidized in the exhaust gases. Finally, recent trends in diesel particulate Emission Control will be discussed, indicating the growing importance of the catalytic solutions: the fast introduction of non-filter-based catalysts for diesel engines and the possible application of filters in combination with catalytically active precursor compounds added to diesel fuel.

Timothy V Johnson - One of the best experts on this subject based on the ideXlab platform.

  • diesel Emission Control in review
    SAE International Journal of Fuels and Lubricants, 2008
    Co-Authors: Timothy V Johnson
    Abstract:

    The paper summarizes the key developments in diesel Emission Control, generally for 2005. Regulatory targets for the next 10 years and projected advancements in engine technology are used to estimate future Emission Control needs. Recent NOx Control developments on selective catalytic reduction (SCR), lean NOx traps (LNT) and lean NOx catalysts (LNC) are then summarized. Likewise, the paper covers important recent developments on diesel particulate filters (DPFs), summarizing regeneration strategies, new filter and catalyst materials, ash management, and PM measurement. Recent developments in diesel oxidation catalysts are also briefly summarized. Finally, the paper discusses examples of how it is all pulled together to meet the tightest future regulations.

  • Diesel Emission Control in review: The last 12 months
    SAE Technical Paper Series, 2003
    Co-Authors: Timothy V Johnson
    Abstract:

    Driven mainly by tightening of regulations, advance diesel Emission Control technologies are rapidly advancing. This paper will review the field with the intent of highlighting representative studies that illustrate the state-of-the-art. First, the author makes estimates of the Emission Control efficiency targets for heavy and light duty applications. Given the emerging significance of ultrafines to health, and to Emission Control technologies, an overview of the significant developments in ultrafine particulate science is provided, followed by an assessment of filter technology. Major deNOx catalyst developments, in addition to SCR and LNT progress is described. Finally, system integration examples are provided. In general, progress is impressive and studies have demonstrated that high-efficiency systems are within reach in all sectors highway vehicle sectors. Engines are making impressive gains, and will increase the options for Emission Control. Regarding ultrafines, evidence suggests the aerosol nanoparticles come from lube oil. Filter technology is focusing on optimization, with work being done on better ways to regenerate the filter and improving system back pressure. SCR NOx Control is focusing on urea injection algorithms, and system optimization, while NOx adsorbers are showing marked improvements in performs and durability. System integration of filters and NOx Control is moving into heavy-duty systems, albeit mainly on the bench.