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Characteristics and Trend Variation of Light,Temperature and Water Resources in Dongling District of Shenyang Province in Recent 49 Years
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作者 刁军 董晓明 +1 位作者 刘凤芝 贺明慧 《Meteorological and Environmental Research》 CAS 2010年第10期33-35,38,共4页
The meteorological data of light,temperature and water during 1961-2009 were selected to analyze the trend variation of climatic resources and provide the basis for developing and utilizing local climate resources.The... The meteorological data of light,temperature and water during 1961-2009 were selected to analyze the trend variation of climatic resources and provide the basis for developing and utilizing local climate resources.The results indicated that light resource presented the decreasing tendency in Dongling District,annual radiation reduced by 528 MJ/m2,and annual sunshine duration decreased by 333 h.The heat resource presented the increasing tendency,the average annual temperature increased by 1.04 ℃,and active accumulated temperature increased by 228 ℃.The general trend of annual precipitation declined slightly,precipitation resource during every age changed slightly and would tend to be stable. 展开更多
关键词 light Temperature and water RESOURCE Tendency rate Trend variation Dongling District China
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Interacting Light Paths Attract KELEA (Kinetic Energy Limiting Electrostatic Attraction) and Can Lead to the Activation of Water 被引量:7
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作者 W. John Martin 《Open Journal of Biophysics》 2015年第4期115-121,共7页
Water can acquire a kinetic activity, which is attributed to the absorption of an environmental force termed KELEA (kinetic energy limiting electrostatic attraction). This activity can lead to increased volatility of ... Water can acquire a kinetic activity, which is attributed to the absorption of an environmental force termed KELEA (kinetic energy limiting electrostatic attraction). This activity can lead to increased volatility of the water that can be measured as the progressive weight loss in closed but not completely sealed containers. It has been proposed that KELEA is a natural force required to prevent the fusion and possible annihilation of electrostatically attracted opposite electrical charges. As such, it may be especially available where there is a convergence of force fields of opposing electrical charges. At least conceptually, this may arise with facing light sources with centrally directed light beams. An oscillating attraction and release of KELEA may be facilitated by repetitively disrupting the light paths using an overhead flashing light source. This paper reports on preliminary studies that are based on this premise. Although not proving the premise, the reported experiments do indicate a simple method for activating water. Moreover, the described procedure should allow for further exploration of the underlying mechanism of water activation. The procedure involves the use of four, diagonally placed regular LED traffic lights, with an overhead strobe light. The volatility of water samples in closed but not completely sealed glass vials placed within the lighted area significantly increases in a manner that persists well beyond the periods of light exposure. The paper further shows that activated water can indirectly lead to the activation of nearby water. The reported observations are of both practical and theoretical importance. 展开更多
关键词 ACE Alternative Cellular Energy KELEA water Hydrogen BONDING light
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Influence of light intensity and water content of medium on total dendrobine of Dendrobium nobile Lindl 被引量:7
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作者 Jin-Ling Li Zhi Zhao +2 位作者 Hong-Chang Liu Chun-Li Luo Hua-Lei Wang 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2017年第11期1095-1100,共6页
Objective: To ascertain the influence of light intensity and water content of medium on the total dendrobine of Dendrobium nobile(D. nobile).Method: The principal component analysis combined with total dendrobine accu... Objective: To ascertain the influence of light intensity and water content of medium on the total dendrobine of Dendrobium nobile(D. nobile).Method: The principal component analysis combined with total dendrobine accumulation was conducted to assess the yield and quality of D. nobile in all treatments. In the experiment, D. nobile plants were cultivated in greenhouse as tested materials, and complete test of 9 treatments was adopted with relative light intensities 75.02%, 39.74%,29.93% and relative water content of medium 50%, 65%, 80%. The plants were treated in June and harvested till December. Indexes including agronomic traits, fresh weight and dry weight of stem and leaf, ash content, extract, and dendrobine were measured.Results: Under the light intensity treatments of 75.02% with 50%, 65%, 80% water content of medium, the basal stems of plants were comparatively thicker with more leaves, and the fresh weight and dry weight of stems and leaves were significantly higher than other 6 treatments.Leaves in all treatments contained dendrobine. Under the light intensity treatments of 75.02%with 50%, 65%, 80% water content of medium, dendrobine content of leaves was lower while dendrobine contents of other treatments were more than 0.60%. After comprehensive assessment through the principal component analysis and total dendrobine accumulation, the results showed that 3 treatments with relative light intensity of 75.02% ranked the top three.Conclusions: In brief, the moderately strong light intensity and water content of medium from low to medium can facilitate the growth and yield of D. nobile plants, while light intensity from moderately weak to weak can enhance the dendrobine content. 展开更多
关键词 Dendrobium nobile light intensity water content of medium Total dendrobine Principal component analysis
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Photosynthetic Light Utilization Efficiency, Water Relations and Leaf Growth of C3 and CAM Tropical Orchids under Natural Conditions 被引量:1
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作者 Shawn Tay Jie He Tim Wing Yam 《American Journal of Plant Sciences》 2015年第18期2949-2959,共11页
Native orchid species of Singapore in their natural conditions experience stress from high irradiance, high temperatures and periods of extended low rainfall, which impact orchid plant physiology and lead to reduced g... Native orchid species of Singapore in their natural conditions experience stress from high irradiance, high temperatures and periods of extended low rainfall, which impact orchid plant physiology and lead to reduced growth and productivity. In this study, it was found that there was a reduction in photochemical efficiency of photosystem II (PSII) in 6 native orchid species under high light (HL) and Bulbophyllum membranaceum under low light (LL). There was chronic photoinhibition in these 6 orchid species over a period of 3 months after transplanting onto the tree trunks without watering and fertilization, especially in Coelogynes mayeriana and Bulbophyllum membranaceum under both HL and LL. This chronic photoinhibition caused by sustained period of water deficit in their natural conditions was later reversed by natural re-watering conditions from higher rainfall. These results indicate that water deficit has a greater impact on photosynthetic light utilization efficiency than excess light. The present study also showed that after natural rewatering, relative water content (RWC) of leaves and pseudobulbs generally increased. During the natural re-watering, total leaf area also gradually increased and reached maximum expansion after 7 weeks under both HL and LL, with some exceptions due to leaf abscission or decline in total leaf area, possibly a strategy for water conservation. 展开更多
关键词 ORCHID CAM C3 PHOTOSYNTHETIC light Utilization Efficiency water Relations and LEAF Growth
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Physical Properties of Water under the Actionby Electricity and Light
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作者 CAO Chang-nian,XING Kai (Dept.of Appl.Phys.,Northwestern Polytechnical University,Xi′an 710072,CHN) 《Semiconductor Photonics and Technology》 CAS 1999年第4期229-232,共4页
The significance of research of water system is demonstrated by the experiments and statistical data. Some physical and chemical properties of water system affected by various factors in the nature are given. It also ... The significance of research of water system is demonstrated by the experiments and statistical data. Some physical and chemical properties of water system affected by various factors in the nature are given. It also points out that further research of the effect on extremely complicated water system caused by electricity, magnetic field, sound and light now becomes an important research subject. 展开更多
关键词 ELECTRICITY Infrared Absorbing Spectrum light Physical Properties water System
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Influence of Artificial Light on Laying Hens Production of Heat, Moisture and Carbon Dioxide in a Floor Housing System
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作者 Gosta Gustafsson Eva Von Wachenfelt 《Journal of Agricultural Science and Technology(A)》 2012年第9期1086-1093,共8页
Investigations about laying hens reactions on artificial light conditions were carried out in a climate chamber equipped with a floor housing system for laying hens. The release of moisture increased during light peri... Investigations about laying hens reactions on artificial light conditions were carried out in a climate chamber equipped with a floor housing system for laying hens. The release of moisture increased during light periods probably due to increased activity which increased respiration rate but also on increased scratching which increased evaporation of moisture from bedding material. The daily average was 6.29 g henl h"l at 4 lux and 5.97 g henl hl, at 93 lux which corresponds to a difference of 5%. The level of light intensity seemed to have little influence on the release of moisture. The total release of heat was slightly higher during light periods compared to dark periods. Explanations can be increased activity but also feed intake increasing the metabolic rate during light periods. The daily average of total heat production was 17.0 W per hen at 4 lux and 14.7 at 93 lux which corresponds to a difference of 16%. The release of carbon dioxide increased during light periods probably due to increased activity and respiration. 展开更多
关键词 Laying hens artificial light heat MOISTURE carbon dioxide.
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The Effect of Photon Flux Density and Lighting Period on Growth,Flowering,Powdery Mildew and Water Relations of Miniature Roses 被引量:1
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作者 Leiv M.Mortensen 《American Journal of Plant Sciences》 2014年第13期1813-1818,共6页
Miniature roses (Rosa sp.) were grown at 100 and 150 μmol m-2·s-1 photon flux densities (PFD) with 16, 20 and 24 h·day-1 lighting periods (LP) in a greenhouse compartment in midwinter at latitude 59° n... Miniature roses (Rosa sp.) were grown at 100 and 150 μmol m-2·s-1 photon flux densities (PFD) with 16, 20 and 24 h·day-1 lighting periods (LP) in a greenhouse compartment in midwinter at latitude 59° north. The study included 10 different treatments and six rose cultivars, altogether 900 plants. The 16 and 20 h LP were applied with or without a dark period of 8 and 4 h·day-1, respectively, by timing the LP in relation to daylight that lasted for 7 - 8 h. Number of days until flowering decreased with an increase in PFD and in LP up to 24 day-1 and was unaffected by the timing of the 16 and 20 h·day-1 LP. Number of flowers and plant dry weight increased 20% to 30% by increasing the PFD. Plant dry weight increased by increasing the LP from 16 to 20 h·day-1 (about 25%), but no effect was found with a further increase to 24 h·day-1. Mean growth rate until flowering increased 30% to 40% by increasing the PFD or by increasing the LP from 16 to 20 h day-1, while little effect was found by a further increase to 24 h·day-1. Increasing the photosynthetic active radiation (PAR) by increasing the LP from 16 to 20 h·day-1 increased the growth rate more than increasing the PFD did. Three of the cultivars were tested for water loss after the detachment of some leaves. Leaves that had developed without a dark period showed a considerably higher water loss than the treatments that included a dark period of 4 or 8 h·day-1. The keeping quality at indoor conditions, however, was unaffected by the treatment due to sufficient watering. Powdery mildew developed significantly more on plants grown with a dark period of 8 h as compared with the other treatments. It was concluded that 20 h·day-1 LP including a dark period of 4 h·day-1 and a PFD of at least 150 μmol·m-2·s-1 should be applied to miniature roses during the winter months in order to effectively produce miniature pot roses with a high quality. 展开更多
关键词 FLOWERING GROWTH Keeping Life Leaf water Loss lighting Period Miniature Rose Photon Flux Density(PFD) Photosynthetic Active Radiation(PAR) Powdery Mildew
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A Novel Visible-light-responsive Photocatalyst Bi1.5Cr0.5WO6 with Suitable Bandgap Structure and Its Application in Water Decontamination
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作者 XIE Li-Yan LIU Ping +2 位作者 HUANG Li-Ting WANG Wan-Jun HUANG Jian-Hui 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2019年第6期930-940,共11页
Integrating the advantages of Bi and Cr elements in the bandgap engineering of metal oxides, a visible-light-responsive photocatalyst Bi1.5Cr0.5WO6 is successfully constructed and initially applied in water decontamin... Integrating the advantages of Bi and Cr elements in the bandgap engineering of metal oxides, a visible-light-responsive photocatalyst Bi1.5Cr0.5WO6 is successfully constructed and initially applied in water decontamination. The combination of UV-vis diffuses reflectance and the Mott-Schottky curve from electrochemical testing can be used to determine the conduction band and valence band of Bi1.5Cr0.5WO6 to be about –1.26 and 1.42 V, respectively. The location of energy band structure indicates that the superoxide free radical can be produced in Bi1.5Cr0.5WO6 photocatalytic system without hydroxyl group. This speculation is also confirmed by ESR experiment and active radical species scavenging experiments. In addition, the best photocatalytic performance of Bi1.5Cr0.5WO6 obtained under 180 ℃ is attributed to the smallest impedance and the strongest electronic migration capability. 展开更多
关键词 tungsten acid BISMUTH chromium VISIBLE-light response photocatalysis water DECONTAMINATION MALACHITE green
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Enhanced Visible-Light-Sensitive Two-Step Overall Water-Splitting Based on Band Structure Controls of Titanium Dioxide and Strontium Titanate
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作者 Satoshi Tanigawa Toshihiro Takashima Hiroshi Irie 《Journal of Materials Science and Chemical Engineering》 2017年第1期129-141,共13页
Visible light-induced two-step overall water-splitting was achieved by combining two types of photocatalysts, which were prepared by introducing foreign elements into rutile titanium dioxide (TiO2) and strontium titan... Visible light-induced two-step overall water-splitting was achieved by combining two types of photocatalysts, which were prepared by introducing foreign elements into rutile titanium dioxide (TiO2) and strontium titanate (SrTiO3) with a controlled electronic band structure. Rutile TiO2 and SrTiO3 were doped with chromium and tantalum (Cr,Ta-TiO2) and with rhodium (Rh-SrTiO3), respectively, to introduce visible-light sensitivity. Under irradiation with only visible light from a 420-nm LED lamp, the simultaneous liberation of hydrogen and oxygen with a molar ratio of ~2:1 was achieved with these two types of photocatalysts in the presence of iodate ion/iodide ion as a redox mediator. 展开更多
关键词 Titanium Dioxide STRONTIUM TITANATE Visible light Overall water-SPLITTING TWO-STEP Excitation
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Electrodeposition of Cu_2O/g-C_3N_4 heterojunction film on an FTO substrate for enhancing visible light photoelectrochemical water splitting 被引量:3
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作者 张声森 晏洁 +5 位作者 杨思源 徐悦华 蔡欣 张向超 彭峰 方岳平 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2017年第2期365-371,共7页
An immobilized Cu2O/g-C3N4 heterojunction film was successfully made on an FTO substrate by electrophoretic deposition of g-C3N4 on a Cu2O thin film.The photoelectrochemical(PEC) performance for water splitting by t... An immobilized Cu2O/g-C3N4 heterojunction film was successfully made on an FTO substrate by electrophoretic deposition of g-C3N4 on a Cu2O thin film.The photoelectrochemical(PEC) performance for water splitting by the Cu2O/g-C3N4 film was better than pure g-C3N4 and pure Cu2O film.Under-0.4 V external bias and visible light irradiation,the photocurrent density and PEC hydrogen evolution efficiency of the optimized Cu2O/g-C3N4 film was-1.38 mA/cm^2 and 0.48 mL h^-1 cm^-2,respectively.The enhanced PEC performance of Cu2O/g-C3N4 was attributed to the synergistic effect of light coupling and a matching energy band structure between g-C3N4 and Cu2O as well as the external bias. 展开更多
关键词 Cuprous oxide Graphitic carbon nitride Heterojunction film ELECTRODEPOSITION Visible light Photoelectrochemical water splitting Hydrogen evolution
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Internal quantum efficiency drop induced by the heat generation inside of light emitting diodes (LEDs) 被引量:3
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作者 陈依新 沈光地 +2 位作者 郭伟玲 徐晨 李建军 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第1期562-565,共4页
The reasons for low output power of AlGalnP Light Emitting Diodes (LEDs) have been analysed. LEDs with AlGaInP material have high internal but low external quantum efficiency and much heat generated inside especiall... The reasons for low output power of AlGalnP Light Emitting Diodes (LEDs) have been analysed. LEDs with AlGaInP material have high internal but low external quantum efficiency and much heat generated inside especially at a large injected current which would reduce both the internal and external quantum efficiencies. Two kinds of LEDs with the same active region but different window layers have been fabricated. The new window layer composed of textured 0.5 μm GaP and thin Indium-Tin-Oxide film has shown that low external quantum efficiency (EQE) has serious impaction on the internal quantum efficiency (IQE), because the carrier distribution will change with the body temperature increasing due to the heat inside, and the test results have shown the evidence of LEDs with lower output power and bigger wavelength red shift. 展开更多
关键词 AlGaInP light emitting diodes internal quantum efficiency heat light power
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The analysis of heat and water fluxes in frozen silty soil
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作者 DaHu Rui Ming Lu +1 位作者 Kunio Watanabe Jun Zhang 《Research in Cold and Arid Regions》 CSCD 2019年第1期21-28,共8页
In this paper, based on the basic equations of water flow and heat transfer, the hydrothermal coupling model is established.The numerical model was realized in COMSOL Multiphysics software, and simulation results are ... In this paper, based on the basic equations of water flow and heat transfer, the hydrothermal coupling model is established.The numerical model was realized in COMSOL Multiphysics software, and simulation results are compared with the experimental results of Watanabe and Wake(2008) to verify the effectiveness of the model. Through the calculation, we can obtain the dynamic changes of heat and water fluxes, thermal and hydrological properties, matric potential and temperature gradient in unsaturated freezing soil; and these variables are unmeasurable in practice. 展开更多
关键词 UNSATURATED FREEZING soil HYDROTHERMAL coupling heat and water FLUXES COMSOL
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基于CEEMDAN-VMD-TCN-lightGBM模型的水质预测研究
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作者 项新建 张颖超 +3 位作者 许宏辉 厉阳 王世乾 郑永平 《中国农村水利水电》 北大核心 2024年第3期86-95,共10页
针对目前水质预测模型中因为数据本身的复杂性、在信号处理过程中存在的噪声干扰以及分解深度不够导致单一分解难以全面捕捉信号非线性特征的问题,提出了一种基于二次分解的水质预测模型。该模型采用完全自适应噪声集合经验模态分解(CEE... 针对目前水质预测模型中因为数据本身的复杂性、在信号处理过程中存在的噪声干扰以及分解深度不够导致单一分解难以全面捕捉信号非线性特征的问题,提出了一种基于二次分解的水质预测模型。该模型采用完全自适应噪声集合经验模态分解(CEEMDAN)对原始数据进行分解,再利用变分模态分解(VMD)对熵值最高的模态分量进行二次分解,最终将处理后的时间序列输入到TCN-lightGBM多特征预测模型中。同时,采用麻雀算法(SSA)对预测模型进行优化。以山东省玉符河水质为例,本模型的均方根误差(RMSE)是0.1053,平均绝对误差(MAE)是0.0815,决定系数(R2)是0.9471,与GRU、LSTM、LightGBM、TCN等当下较为流行的模型的预测指标进行比较。结果显示,在R2上本模型提升了53.04%、70.41%、66.07%、65.20%等,在RMSE上减少了62.76%、65.50%、64.93%、64.80%等,在MAE上降低了62.76%、66.24%、63.80%、65.24%等。由此可知,基于CEEMDAN-VMD-TCN-lightGBM的模型具有更好的预测性能、泛化能力和捕捉信号非线性特征的能力。 展开更多
关键词 二次分解 TCN lightGBM 多特征预测 水质预测 麻雀算法
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Nanocomposites of graphene-CdS as photoactive and reusable catalysts for visible-light-induced selective reduction process 被引量:1
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作者 Siqi Liu Min-Quan Yang +1 位作者 Nan Zhang Yi-Jun Xu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2014年第2期145-155,共11页
Graphene (GR)-CdS nanocomposites with different weight addition ratios of GR have been assembled by a facile solvothermal treatment. The GR-CdS nanocomposite photocatalyst with an appropriate ratio of GR exhibits en... Graphene (GR)-CdS nanocomposites with different weight addition ratios of GR have been assembled by a facile solvothermal treatment. The GR-CdS nanocomposite photocatalyst with an appropriate ratio of GR exhibits enhanced photoactivity for selective reduction of aromatic nitro compounds to the corresponding aromatic amines in water under visible light irradiation as compared with blank-CdS. The characterization of GR-CdS nanocomposite photocatalysts by a collection of techniques discloses that: i) GR can tune the microscopic morphology of CdS nanoparticles and improve light absorption intensity in the visible light region; ii) GR scaffolds act as an electron reservoir to trap and shuttle the electrons photogenerated from CdS semiconductor under the visible light illumination; iii) the introduction of GR enhances the adsorption capacity of GR-CdS nanocomposites toward the substrates, aromatic nitro compounds. The synergistic effect of these factors should account for the photoactivity advancement of GR-CdS nanocomposites toward the probe reactions. Furthermore, because the photogenerated holes in the system are trapped by the quenching agent ammonium oxalate, the as-obtained GR-CdS photocataiyst is stable during the photocatalytic reduction reactions. A reasonable model has also been proposed to illustrate the reaction mechanism. 展开更多
关键词 graphene CDS photocatalytic selective reduction nitro compounds visible light water
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Model Test and Design of the Wave Energy System on "Central Fairway No. 1" Light Ship 被引量:1
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作者 Gao Xiangfan , Liang Xianguang Jiang Niandong Feng Manzhi Wang Wei Senior Engineer, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, 510070 GuangzhouAssociate Professor, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, 510070 Guangzhou Engineer, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, 510070 Guangzhou 《China Ocean Engineering》 SCIE EI 1992年第3期351-360,共10页
This paper presents the test of a ship model for the design of a backward-bent duct oscillating water column type wave energy conversion system, to supply electric power for a light ship. This system suggests a new wa... This paper presents the test of a ship model for the design of a backward-bent duct oscillating water column type wave energy conversion system, to supply electric power for a light ship. This system suggests a new way to produce electric power automatically for large light ships. 展开更多
关键词 model test wave energy oscillating water column (OWC) light ship wave-activated generator
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Aurivillius compound Bi_(5)Ti_(3)CrO_(15) as a visible-light-active photocatalyst for hydrogen production from water 被引量:2
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作者 Zeming Gu Jun Qian +3 位作者 Ran Wang Meilin Lv Xiaoxiang Xu Chun Luo 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第11期572-580,I0013,共10页
Layered Aurivillius compound Bi_(5)Ti_(3)CrO_(15) has been synthesized by a hydrothermal method for the application as a photocatalyst to liberate hydrogen from water. Bi_(5)Ti_(3)CrO_(15) owns a narrow band gap (Eg ~... Layered Aurivillius compound Bi_(5)Ti_(3)CrO_(15) has been synthesized by a hydrothermal method for the application as a photocatalyst to liberate hydrogen from water. Bi_(5)Ti_(3)CrO_(15) owns a narrow band gap (Eg ~2.46 eV) and shows stable photocatalytic activity under both full range (λ ≥250 nm) and visible light illumination (λ ≥420 nm). A short hydrothermal reaction time is critical to achieve high photocatalytic activity as defects such as Cr^(6+) and Bi^(5+) can be avoided. An AQE as high as 3.66% at 420 nm ± 20 nm has been recorded, warranting promising application in the field of solar energy conversions. DFT calculation reveals the important role of Cr^(3+) cations for visible light sensitivity of Bi_(5)Ti_(3)CrO_(15). 展开更多
关键词 Bi_(5)Ti_(3)CrO_(15) Aurivillius phase PHOTOCATALYST water splitting Visible light DFT
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Forming technology of boiling structure on evaporation surface of phase-change heat sink for high-power light emitting diode 被引量:1
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作者 向建化 叶邦彦 +2 位作者 汤勇 周伟 胡志华 《Journal of Central South University》 SCIE EI CAS 2010年第3期544-548,共5页
Boiling structures on evaporation surface of red copper sheet with a diameter (D) of 10 mm and a wall thickness (h) of 1 mm were processed by the ploughing-extrusion (P-E) processing method, which is one part of... Boiling structures on evaporation surface of red copper sheet with a diameter (D) of 10 mm and a wall thickness (h) of 1 mm were processed by the ploughing-extrusion (P-E) processing method, which is one part of the phase-change heat sink for high power (HP) light emitting diode (LED). The experimental results show that two different structures of rectangular- and triangular-shaped micro-grooves are formed in P-E process. When P-E depth (ap), interval of helical grooves (dp) and rotation speed (n) are 0.12 ram, 0.2 mm and 100 r/min, respectively, the boiling structures of triangular-shaped grooves with the fin height of 0.15 mm that has good evaporation performance are obtained. The shapes of the boiling structures are restricted by dp and ap, and dp is determined by n and amount of feed (f). The ploughing speed has an important influence on the formation of groove structure in P-E process. 展开更多
关键词 phase-change heat sink boiling structure high power light emitting diode ploughing-extrusion
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Application of homogenization techniques for inflow transport approximation on light water reactor analysis 被引量:1
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作者 Xiang Xiao Kan Wang +1 位作者 Tong-Rui Yang Yi-Xue Chen 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2022年第1期67-80,共14页
The transport cross-section based on inflow transport approximation can significantly improve the accuracy of light water reactor(LWR)analysis,especially for the treatment of the anisotropic scattering effect.The prev... The transport cross-section based on inflow transport approximation can significantly improve the accuracy of light water reactor(LWR)analysis,especially for the treatment of the anisotropic scattering effect.The previous inflow transport approximation is based on the moderator cross-section and normalized fission source,which is approximated using transport theory.Although the accuracy of reactivity is increased,the P0 flux moment has a large error in the Monte Carlo code.In this study,an improved inflow transport approximation was introduced with homogenization techniques,applying the homogenized cross-section and accurate fission source.The numerical results indicated that the improved inflow transport approximation can increase the P0 flux moment accuracy and maintain the reactivity calculation precision with the previous inflow transport approximation in typical LWR cases.In addition to this investigation,the improved inflow transport approximation is related to the temperature factors.The improved inflow transport approximation is flexible and accurate in the treatment of the anisotropic scattering effect,which can be directly used in the temperature-dependent nuclear data library. 展开更多
关键词 Inflow transport approximation Anisotropic scattering effect Homogenization techniques light water reactor
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Thermal Analysis of Organic Light Emitting Diodes Based on Basic Heat Transfer Theory 被引量:1
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作者 张稳稳 吴朝新 +3 位作者 刘迎文 董军 严学文 侯洵 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第8期139-143,共5页
We investigate the thermal characteristics of standard organic light-emitting diodes (OLEDs) using a simple and clear 1D thermal model based on the basic heat transfer theory. The thermal model can accurately estima... We investigate the thermal characteristics of standard organic light-emitting diodes (OLEDs) using a simple and clear 1D thermal model based on the basic heat transfer theory. The thermal model can accurately estimate the device temperature, which is linearly with electrical input power. The simulation results show that there is almost no temperature gradient within the OLED device working under steady state conditions. Furthermore, thermal analysis simulation results show that the surface properties (convective heat transfer coetficient and surface emissivity) of the substrate or cathode can significantly affect the temperature distribution of the OLED. 展开更多
关键词 OLEDS Thermal Analysis of Organic light Emitting Diodes Based on Basic heat Transfer Theory EML
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Theoretical Models of Light Scattering Applied in Sizing Particles in Coal Water Slurry 被引量:1
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作者 王仁哲 张荣曾 徐志强 《Journal of China University of Mining and Technology》 2004年第1期64-66,81,共4页
Advantges and disadvantage of Mie scattering model and Fraunhofer diffraction model are discussed. The result shows that 1) the Fraunhofer diffraction model is simple in design and fast in operation, which is quite su... Advantges and disadvantage of Mie scattering model and Fraunhofer diffraction model are discussed. The result shows that 1) the Fraunhofer diffraction model is simple in design and fast in operation, which is quite suitable for on-line control and 2) the intensity and energy distribution of diffracted light of both the Mie scattering model and the Fraunhofer theoretical model are compared and researched. Feasibility of using the Fraunhofer diffraction model to replace the Mie scattering model in measuring particles in coal water slurry is demonstrated. 展开更多
关键词 coal water slurry light scattering model Mie scattering model DIFFRACTION
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