熱擴散率 的英文怎麼說

中文拼音 [rèkuòsǎnlǜ]
熱擴散率 英文
diffusivity of heat
  • 擴 : 動詞（擴大） expand; enlarge; extend
  • 散 : 散動詞1. （由聚集而分離） break up; disperse 2. （散布） distribute; disseminate; give out 3. （排除） dispel; let out
  • 率 : 率名詞（比值） rate; ratio; proportion
  1. In heterogeneous anisotropic materials the thermal diffusivity cannot be described by a single number.

    在各向異性的非均質物質中，熱擴散率不可能用一個簡單數字來表達。
  2. The thermal conductivities and thermal diffusivities of the material must be known.

    必須知道各種材料的熱導率和熱擴散率。
  3. A transfer model is established, which can be used to study the interaction between the land surface physical processes of inhomogeneous region and the structure of atmosphere boundary - layer over urban and rural terrains. the model has simulated surface heat flux, surface temperature, temperature profiles, height of mixture layer and so on. and the differences between urban area, suburban area and rural area have been compared. this model mainly depends on the parameters below : surface albedo, surface roughness coefficient, moisture available coefficient of soil, thermal capacity and thermal diffusion coefficient of errain, cloudage. the result shows that this model can simulate the structure and eigenvalues of atmosphere boundary layer and their changes in a day. parameters used in this model aim at beijing city, and the time is at the beginning of september. to other cities, or other time, the parameters should be adjusted accordingly. in addition, being adjusted, the model can also be used for other homogeneous and inhomogeneous terrains

    模式主要依賴于以下參數和物理量：地面反照率下墊面粗糙度土壤的可含水量下墊面的熱容量和熱擴散系數雲量等參數。結果表明，本模式能合理地模擬不同地表熱量平衡地表氣溫混合層高度湍流交換系數湍流動能位溫廓線等，以及它們的日變化。該模式所取參數主要針對北京市，時間為九月初，對于其他城市，參數應作相應的調整。
  4. Test methods of thermal diffusivity, specific heat capacity, and thermal conductivity for fine ceramics by laser flash method

    激光閃爍法測定精細陶瓷的熱擴散率比熱容量熱傳導率試驗方法
  5. These kinds of measurements are necessary for determinations of thermal diffusivities from the thermal conductivity and densities.

    根據熱導率和密度確定熱擴散率必須進行這種測量。
  6. In materials marked by low thermal diffusivity, the absorption is good.

    熱擴散率低的物質吸收性好。
  7. Limiting the extraction of great amount of heat from the underground even more is the low thermal conductivity and low thermal diffusivity of rocks.

    由於巖石的熱導率和熱擴散率都比較低，更加限制了地下熱能的大量抽取。
  8. Test method for thermal diffusivity of hardmetal carbide

    硬質合金熱擴散率的測定方法
  9. Taking into consideration of the factor include heat diffuse coefficient of soil and time, which affect soil temperature of differential deep, the model can calculates temperature of any time in different depth

    模型中充分考慮了土壤熱擴散率、時間對溫室土壤不同深度的溫度影響，可計算出任一時間、土壤不同深度的溫度。
  10. It presents a mathematical heat transfer model of air and soil temperature in greenhouse basing on the theory of transmission of heat. the model calculates the heat diffuse coefficient of soil by difference method and establishes regression equation on experimental data by sas

    基於傳熱學的熱傳導方程，利用測試的地溫數據，選用差分法計算了土壤熱擴散率，應用sas軟體擬合了非線性方程，建立了日光溫室土壤溫度場的數學模型。
  11. To measure the thin film ' s diffusivity a testing system based on the ac * calorimetric method is set up, in which a laser source is used to heat up the samples

    根據交流量熱法原理，構建了一個測量薄膜熱擴散率的測試系統。在該系統中，用超短脈寬的激光作為熱源。
  12. This paper mainly studies on the thermal diffusivity and thermal conductivity by ptr method

    本文主要用光熱輻射（ ptr ）技術理論來研究材料的熱擴散系數和熱導率。
  13. We give ptr ' s amplitude and phase signal of one dimension based on the theory of ptr, discuss the ptr ' s signal ' s frequency characteristic, and a method for measuring thermal diffusivity of opaque materials is introduced. then, we study on anisotropic materials " thermal conductivity, the temperature field and thermal conductivity tensor of anisotropic materials is theoretically deduced from the theory of ptr, and is proved by the experiment

    從光熱輻射理論出發，推導出一維情況下ptr信號的振幅和位相表達式，討論了光熱信號的頻率特性，介紹了一種用ptr技術測量不透明材料熱擴散系數的優化方法；接著研究分析了各向異性介質受調制激光束輻照下產生的光熱信號，在理論上推導出各向異性介質的溫度場以及熱導率張量並給予一定的實驗驗證。
  14. Testing of carbon materials ; determination of thermal diffusity at high temperatures by the laser pulse method ; solid materials

    炭素材料的試驗.高溫下用激光脈沖法測定熱擴散率.固
  15. A new thermal probe method for determining thermal conductivity based on the minimal dispersion of thermal diffusivity

    據熱擴散率最小離散度確定導熱系數的新熱探針法
  16. A new method of measuring thermal diffusivity for solid material by modulated photothermal reflectance technique

    光熱反射技術測量材料熱擴散率的一種新方法
  17. Moreover, there are good fitted power function relationship between thermal conductivity and soil water content, soil water suction and salt concentration. meanwhile, based on the measured data of soil water content and soil temperature distribution under temperature - controlled conditions, according to philip ' s empirical equation, through difference method, the water diffusivity under temperature gradient was calculated, which can be expressed as a power function of temperature

    此外，研究表明，導熱率與土壤含水率、土壤水吸力、含鹽濃度之間均存在良好的冪函數關系；在取得一定溫控條件下的土壤水分與溫度分佈實測資料的基礎上，根據philip經驗方程，通過差分法計算得出溫差作用下的水分擴散率，該參數可表示為溫度的冪函數形式。
  18. The results show that the thermal diffusivity of thin film is smaller than its corresponding bulk material, and with the decreasing of the thickness, the thermal diffusivity also decreasing

    ）的二氧化硅薄膜、氮化硅薄膜、多晶硅薄膜的熱擴散率，實驗結果表明，薄膜的熱擴散率比其體材料的要小，並且隨著薄膜厚度的減小，熱擴散率也減小。
  19. Advanced technical ceramics. ceramic composites. thermophysical properties. determination of thermal diffusivity

    高技術陶瓷.陶瓷混合物.熱物理學特性.第2部分:熱擴散率的測定
  20. The heat transfer and thermophysical properties of thin films, including thermal conductivity and thermal diffusivity, differ from the corresponding bulk material when it comes into microscale regime

    進入微尺度以後，薄膜材料的導熱規律以及熱物性（包括熱擴散率、熱導率）與體材料相比發生了很大的變化，出現了超常現象。
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