扩散率

短切纤维和2D碳布叠层结构的摩阻材料平行方向的热扩散率为垂直方向的两倍；

Axial Thermal diffusivity of short fiber and2D fabric is twice as large as longitude thermal diffusivity .

瞬态热栅法测量La（0.6）Sr（0.4）MnO3薄膜的热扩散率

Thermal diffusivity of La_ ( 0.6 ) Sr_ ( 0.4 ) MnO_3 thin film measured by transient thermal grating

文中利用Ansys软件模拟验证了测试结构设计的合理性和模型建立的正确性，在自然环境下，实验测得多晶硅薄膜扩散率。

Finite element software ANSYS is used to verify the design and the electrothermal model .

Cu+在ZnS中具有很高的热扩散率，500℃时热扩散系数已达10-9cm2/s，是各种杂质中热扩散最强的杂质。

Cu + possesses a strong thermo-diffusion with diffusivity of about 10-9 cm2 / s in ZnS .

热导率的变化与热扩散率的变化有相似的规律；材料的热膨胀系数随温度的升高单调递增，温度上升相同情况下，材料的热膨胀系数随Ni含量的增加而增加。

Thermal expansion coefficient of TiC-Ni cermets increased monotonously with temperature increasing , and also increased with Ni content when the cermets were heated to the same temperature .

PTR方法对材料热扩散率和热导率的研究

Study on the Thermal Diffusivity and Thermal Conductivity by PTR Method

KDP和DKDP溶液扩散率的全息研究

Holographic Study on Diffusivity of KDP and DKDP in Solution

不透明材料热扩散率PTR测量方法的研究

Study on Measurement of Thermal Diffusivity of Opaque Material by PTR Method

液态合金有效热扩散率DFP反算方法

DFP Inverse Method of Effective Thermal Diffusivity of Liquid Alloy

利用Mirage效应确定非均匀材料厚度方向的热扩散率分布

Determination of thermal diffusivity distribution along the thickness of an inhomogeneous material by Mirage effect

CuCr触头合金热扩散率的实验研究

Experimental study of thermal diffusivity for CuCr contact alloys

假设（J0-φ0）为泵且处于薄随机层，给出扩散率的解析表达式。同时，我们又数值计算了作为耦合常数b、非线性参数K及迭代次数N等函数的扩散率。

We present estimates diffusion coefficient as a function of coupling constant b , the nonlinearity parameters k and the number of iteration N , and compared with the results of the theoretical .

同时，我们利用MPR径向扫描法测量了块状样品的热扩散率，得到了较好的实验结果。

Moreover , the sample 's thermal diffusivity is measured by MPR radial scanning methods . Experimental results are satisfactory .

计算机解PARKER数学模型在激光热导仪测定热扩散率研究中的应用

Application of computer solutions of parker 's mathematical model to analytical investigation of laser pulse conductivity apparatus for determining thermal diffusivity

结果表明：非饱和土壤水扩散率变化于8.30×10-4-4.23cm2／min之间，土壤水分扩散率随土壤含水量的变化而变化。

The results show that the unsaturated soil water diffusivity ranged from 8 . 30 × 10-4 to 4 . 23 cm2 / min , and was influenced by soil moisture .

用内排水法实地测定了比利时北部近海岸草地沙土的非饱和导水率K（θ）和扩散率D（θ）.并求得其经验公式。

Unsaturated hydraulic conductivity K (θ) and diffusivity D (θ) of meadow sandy soil in coastal area of North Belgium are determined in situ by internal drainage method , and their empirical formulae are obtained .

非均匀等离子体由激光诱发的后向Raman散射利用Mirage效应确定非均匀材料厚度方向的热扩散率分布

BACKWARD RAMAN SCATTERING EXCITED BY LASER LIGHT IN AN INHOMOGENEOUS PLASMA Determination of thermal diffusivity distribution along the thickness of an inhomogeneous material by Mirage effect

结果表明频域PTR技术可以较准确的测量金属膜材料的热扩散率。

The results show that the frequency-domain PTR method could accurately measure the diffusivity of metal film material . 3 .

随TiC含量增加，材料的热膨胀系数和比热容都增加，而热扩散率和热导率则显著下降。

As TiC content increases the coefficient of thermal expansion and the heat capacity of TiC / W composite increase , but , the thermal diffusivity and the thermal conductivity decrease remarkably .

准确获取能代表田间土壤条件的土壤水分运动参数（土壤水分特征曲线（或比水容重C）、土壤导水率K和土壤水分扩散率D）是模拟土壤中水和溶质运动的基础。

An important step for understanding transport of water and solute in soils is to obtain soil water properties which can represent field conditions . The parameters include soil water characteristic curve , hydraulic conductibility ( K ) and water diffusivity ( D ) .

结论锥体束扩散率及各向异性指标结合彩色FA图及彩色编码张量图，可对痉挛型脑瘫患儿运动功能障碍做出客观评价。

Conclusion The diffusivity and the anisotropy values combined with color-coded FA images and three-dimensional color-coded tensor images are potentially useful in the assessment of motor dysfunction in children with spastic cerebral palsy .

多晶硅薄膜被广泛地应用于MEMS和集成电路系统中，多晶硅薄膜的热扩散率与器件的动态特性有紧密联系。

And Polysilicon thin films are widely used in MEMS devices and ICs , which are important constituents of such micromechanical elements . The diffusivity of it has close relationship with the dynamic response of thermal CMOS devices .

为了测量纳米材料的热扩散率，采用激光光热位移技术测量了不同频率下热位移的相位，由相位的拟合曲线得到材料热扩散率的方法，得到了不同退火温度下纳米TiO2热扩散率。

A method for measuring diffusivity of nanometer material by means of laser photothermal displacement technique is presented , which measures the phase of thermal displacement in different frequencies and gives the diffusivity of material by fitted curves of phase .

本文对Si-Mo、Cr-Mo耐热铸铁的导热率和热扩散率及其影响因素作了测试和分析。

In this paper , the thermal conductivity , thermal diffusivity and effecting factors of Si-Mo , Cr-Mo heat resisting cast iron were measured and analysed .

当样品的前表面被一束脉冲激光照射时，可从样品后表面的温升历程得到热扩散率，此即Parker的方法。

When the front surface of the specimen is radiated by a laser pulse , the thermal diffusivity a can be obtained by the temperature rising history of the rear surface of specimen ( i.e. Parker 's method ) .

理论分析表明，在利用MPR频响法测量材料热扩散率时，该方法无需测量泵浦和探测光斑半径的大小，可有效地避免泵浦和探测光斑半径的测量误差对热扩散率测量的不利影响。

It was showed that the method didn ′ t need to directly determine sizes of pump and probe beams , which effectively avoid the influence of the error resulted from determining the beam sizes on the thermal diffusivity measurement .

基于传热学的热传导方程，利用测试的地温数据，选用差分法计算了土壤热扩散率，应用SAS软件拟合了非线性方程，建立了日光温室土壤温度场的数学模型。

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 .

结果表明：竹材的热扩散率α与竹材生长的方向和高度的关系不大；导热系数λ、热扩散率α、比热均Cp在温度为70℃左右时具有最大值。

The result shows that the thermal diffusivity α of bamboo has little to do with its height and direction and that the heat conductivity λ, the thermal diffusivity α and the specific heat C _p are all getting their maximum values at the temperature of 70 ℃ .

方法：对29例RRMS患者和35例健康志愿者行常规MRI和DTI检查，分割提取NAWM后，绘制出NAWM的平均扩散率（MD）和部分各向异性（FA）直方图，并对其进行分析。

Methods : Conventional and DTI scans were performed in 29 patients with RRMS and 35 controls . After segmentation of the NAWM , the mean diffusivity ( MD ) and fractional anisotropy ( FA ) histograms of the NAWM were created and analyzed .

实验结果表明该结构的热扩散率比SiO2体材料的要小，并且随着SiO2层厚度的减小，热扩散率也减小。熔融织构（MTG）的YBa2Cu3O（7-δ）块材的交流磁化率研究

The results show that the thermal diffusivity of the thin film was smaller than its corresponding bulk material , and with the decreasing of the film thickness , the thermal diffusivity also decreasing . AC Susceptibility on YBa_2Cu_3O ( 7 - δ) Bulk Material by Melt-textured Growth Method