The Experts below are selected from a list of 16554 Experts worldwide ranked by ideXlab platform
M G Kong - One of the best experts on this subject based on the ideXlab platform.
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array of surface confined glow discharges in atmospheric pressure helium modes and dynamics
Applied Physics Letters, 2014Co-Authors: Dan Li, Hongtao Li, H L Chen, M G KongAbstract:Array of atmospheric pressure surface discharges confined by a two-dimensional Hexagon electrode mesh is studied for its discharge modes and temporal evolution so as to a theoretical underpinning to their growing applications in medicine, aerodynamic control, and environmental remediation. Helium plasma surface-confined by one Hexagon-shaped rim electrode is shown to evolve from a Townsend mode to a normal and abnormal glow mode, and its evolution develops from the rim electrodes as six individual microdischarges merging in the middle of the Hexagon mesh element. Within one Hexagon element, microdischarges remain largely static with the mesh electrode being the instantaneous cathode, but move towards the Hexagon center when the electrode is the instantaneous anode. On the entire array electrode surface, plasma ignition is found to beat an unspecific Hexagon element and then spreads to ignite surrounding Hexagon elements. The spreading of microdischarges is in the form of an expanding circle at a speed of ...
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array of surface confined glow discharges in atmospheric pressure helium modes and dynamics
Applied Physics Letters, 2014Co-Authors: Dongmei Li, H L Chen, Hong Li, M G KongAbstract:Array of atmospheric pressure surface discharges confined by a two-dimensional Hexagon electrode mesh is studied for its discharge modes and temporal evolution so as to a theoretical underpinning to their growing applications in medicine, aerodynamic control, and environmental remediation. Helium plasma surface-confined by one Hexagon-shaped rim electrode is shown to evolve from a Townsend mode to a normal and abnormal glow mode, and its evolution develops from the rim electrodes as six individual microdischarges merging in the middle of the Hexagon mesh element. Within one Hexagon element, microdischarges remain largely static with the mesh electrode being the instantaneous cathode, but move towards the Hexagon center when the electrode is the instantaneous anode. On the entire array electrode surface, plasma ignition is found to beat an unspecific Hexagon element and then spreads to ignite surrounding Hexagon elements. The spreading of microdischarges is in the form of an expanding circle at a speed of about 3 × 104 m/s, and their quenching starts in the location of the initial plasma ignition. Plasma modes influence how input electrical power is used to generate and accelerate electrons and as such the reaction chemistry, whereas plasma dynamics are central to understand and control plasma instabilities. The present study provides an important aspect of plasma physics of the atmospheric surface-confined discharge array and a theoretical underpinning to its future technological innovation.
H L Chen - One of the best experts on this subject based on the ideXlab platform.
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array of surface confined glow discharges in atmospheric pressure helium modes and dynamics
Applied Physics Letters, 2014Co-Authors: Dan Li, Hongtao Li, H L Chen, M G KongAbstract:Array of atmospheric pressure surface discharges confined by a two-dimensional Hexagon electrode mesh is studied for its discharge modes and temporal evolution so as to a theoretical underpinning to their growing applications in medicine, aerodynamic control, and environmental remediation. Helium plasma surface-confined by one Hexagon-shaped rim electrode is shown to evolve from a Townsend mode to a normal and abnormal glow mode, and its evolution develops from the rim electrodes as six individual microdischarges merging in the middle of the Hexagon mesh element. Within one Hexagon element, microdischarges remain largely static with the mesh electrode being the instantaneous cathode, but move towards the Hexagon center when the electrode is the instantaneous anode. On the entire array electrode surface, plasma ignition is found to beat an unspecific Hexagon element and then spreads to ignite surrounding Hexagon elements. The spreading of microdischarges is in the form of an expanding circle at a speed of ...
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array of surface confined glow discharges in atmospheric pressure helium modes and dynamics
Applied Physics Letters, 2014Co-Authors: Dongmei Li, H L Chen, Hong Li, M G KongAbstract:Array of atmospheric pressure surface discharges confined by a two-dimensional Hexagon electrode mesh is studied for its discharge modes and temporal evolution so as to a theoretical underpinning to their growing applications in medicine, aerodynamic control, and environmental remediation. Helium plasma surface-confined by one Hexagon-shaped rim electrode is shown to evolve from a Townsend mode to a normal and abnormal glow mode, and its evolution develops from the rim electrodes as six individual microdischarges merging in the middle of the Hexagon mesh element. Within one Hexagon element, microdischarges remain largely static with the mesh electrode being the instantaneous cathode, but move towards the Hexagon center when the electrode is the instantaneous anode. On the entire array electrode surface, plasma ignition is found to beat an unspecific Hexagon element and then spreads to ignite surrounding Hexagon elements. The spreading of microdischarges is in the form of an expanding circle at a speed of about 3 × 104 m/s, and their quenching starts in the location of the initial plasma ignition. Plasma modes influence how input electrical power is used to generate and accelerate electrons and as such the reaction chemistry, whereas plasma dynamics are central to understand and control plasma instabilities. The present study provides an important aspect of plasma physics of the atmospheric surface-confined discharge array and a theoretical underpinning to its future technological innovation.
Dongmei Li - One of the best experts on this subject based on the ideXlab platform.
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array of surface confined glow discharges in atmospheric pressure helium modes and dynamics
Applied Physics Letters, 2014Co-Authors: Dongmei Li, H L Chen, Hong Li, M G KongAbstract:Array of atmospheric pressure surface discharges confined by a two-dimensional Hexagon electrode mesh is studied for its discharge modes and temporal evolution so as to a theoretical underpinning to their growing applications in medicine, aerodynamic control, and environmental remediation. Helium plasma surface-confined by one Hexagon-shaped rim electrode is shown to evolve from a Townsend mode to a normal and abnormal glow mode, and its evolution develops from the rim electrodes as six individual microdischarges merging in the middle of the Hexagon mesh element. Within one Hexagon element, microdischarges remain largely static with the mesh electrode being the instantaneous cathode, but move towards the Hexagon center when the electrode is the instantaneous anode. On the entire array electrode surface, plasma ignition is found to beat an unspecific Hexagon element and then spreads to ignite surrounding Hexagon elements. The spreading of microdischarges is in the form of an expanding circle at a speed of about 3 × 104 m/s, and their quenching starts in the location of the initial plasma ignition. Plasma modes influence how input electrical power is used to generate and accelerate electrons and as such the reaction chemistry, whereas plasma dynamics are central to understand and control plasma instabilities. The present study provides an important aspect of plasma physics of the atmospheric surface-confined discharge array and a theoretical underpinning to its future technological innovation.
János Bölöni - One of the best experts on this subject based on the ideXlab platform.
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a grid based satellite image supported multi attributed vegetation mapping method meta
Folia Geobotanica, 2007Co-Authors: Zsolt Molnár, Sándor Bartha, Tibor Seregélyes, Eszter Illyés, Gábor Tímár, Ferenc Horváth, András Révész, András Kun, Zoltan Bottadukat, János BölöniAbstract:In this paper we present the main characteristics of a new, grid-based, landscape-ecology-oriented, satellite-image supported, field vegetation mapping method, called META (META stands for Magyarorszagi Előhelyek Terkepi Adatbazisa: GIS Database of the Hungarian Habitats). The goals of the META method based vegetation mapping program (META mapping) include the following: (1) to map the actual (semi-)natural vegetation of Hungary; (2) to evaluate Hungarian (semi-)natural vegetation heritage for conservation purposes; (3) to evaluate the present state of Hungarian landscapes from a vegetation point of view; (4) to collect vegetation and landscape ecological data for the prognosis of future changes of vegetation and the landscape. Spatial resolution, mapped attributes and mapping methods were developed to meet these goals. The META method uses a Hexagon grid with cells of 35 hectares. In the Hexagons, habitat types are listed, then the area, naturalness-based habitat quality, spatial pattern in the Hexagon, effect of the neighbourhood, connectedness, and threats are recorded for each habitat type. Other attributes are recorded in the Hexagons: potential natural vegetation, area occupied by invasive plant species, area of old fields, land use of grasslands, and landscape health status (naturalness and regeneration potential of the landscape in general). One hundred Hexagons form a quadrat — mainly for practical, organizational reasons, but also for collecting certain vegetation data at this spatial scale. For standardization of mapping, three different pre-printed data sheets and two different kinds of guides have been composed (Mapping Guide and Habitat Guide) and field trainings were organized. For standardization of estimation of naturalness-based habitat quality and regeneration potential field examples were prepared for each habitat type and each category of these attributes.
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A grid-based, satellite-image supported, multi-attributed vegetation mapping method (MÉTA)
Folia Geobotanica, 2007Co-Authors: Zsolt Molnár, Sándor Bartha, Tibor Seregélyes, Eszter Illyés, Zoltán Botta-dukát, Gábor Tímár, Ferenc Horváth, András Révész, András Kun, János BölöniAbstract:In this paper we present the main characteristics of a new, grid-based, landscape-ecology-oriented, satellite-image supported, field vegetation mapping method, called MÉTA (MÉTA stands for Magyarországi Élőhelyek Térképi Adatbázisa: GIS Database of the Hungarian Habitats). The goals of the MÉTA method based vegetation mapping program (MÉTA mapping) include the following: (1) to map the actual (semi-)natural vegetation of Hungary; (2) to evaluate Hungarian (semi-)natural vegetation heritage for conservation purposes; (3) to evaluate the present state of Hungarian landscapes from a vegetation point of view; (4) to collect vegetation and landscape ecological data for the prognosis of future changes of vegetation and the landscape. Spatial resolution, mapped attributes and mapping methods were developed to meet these goals. The MÉTA method uses a Hexagon grid with cells of 35 hectares. In the Hexagons, habitat types are listed, then the area, naturalness-based habitat quality, spatial pattern in the Hexagon, effect of the neighbourhood, connectedness, and threats are recorded for each habitat type. Other attributes are recorded in the Hexagons: potential natural vegetation, area occupied by invasive plant species, area of old fields, land use of grasslands, and landscape health status (naturalness and regeneration potential of the landscape in general). One hundred Hexagons form a quadrat — mainly for practical, organizational reasons, but also for collecting certain vegetation data at this spatial scale. For standardization of mapping, three different pre-printed data sheets and two different kinds of guides have been composed (Mapping Guide and Habitat Guide) and field trainings were organized. For standardization of estimation of naturalness-based habitat quality and regeneration potential field examples were prepared for each habitat type and each category of these attributes.
Dan Li - One of the best experts on this subject based on the ideXlab platform.
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array of surface confined glow discharges in atmospheric pressure helium modes and dynamics
Applied Physics Letters, 2014Co-Authors: Dan Li, Hongtao Li, H L Chen, M G KongAbstract:Array of atmospheric pressure surface discharges confined by a two-dimensional Hexagon electrode mesh is studied for its discharge modes and temporal evolution so as to a theoretical underpinning to their growing applications in medicine, aerodynamic control, and environmental remediation. Helium plasma surface-confined by one Hexagon-shaped rim electrode is shown to evolve from a Townsend mode to a normal and abnormal glow mode, and its evolution develops from the rim electrodes as six individual microdischarges merging in the middle of the Hexagon mesh element. Within one Hexagon element, microdischarges remain largely static with the mesh electrode being the instantaneous cathode, but move towards the Hexagon center when the electrode is the instantaneous anode. On the entire array electrode surface, plasma ignition is found to beat an unspecific Hexagon element and then spreads to ignite surrounding Hexagon elements. The spreading of microdischarges is in the form of an expanding circle at a speed of ...
