查询词典 temperature conductivity

The results show that thermal conductivity of SiC is inversely proportional to temperature, and the coefficient of linear expansion is directly proportional to temperature.

结果表明，SiC材料导热系数与温度成反比，其线膨胀系数与温度成正比。

According to actual condition, a model of wall thickness of rotary kiln is established. The constant coefficients in the model, including thermal conductivity, heat transfer coefficient, Fourier coefficient and contact resistance, are closely calculated. A formula of contact resistance is draw from a great deal of data of surface and inner temperature of rotary kiln. The wall thickness of rotary kiln is simulated by MATLAB. The simulation result is transmitted from MATLAB to DELPHI through a group of interface functions compiled by VC++. The basic graphs-circle and line are analyzed by the means of the technique of Visualization in Scientific Computing and the Bresenham arithmetic, and are realized the visualization of the wall thickness. The contents of communication between master computer and slaver computer are designed and the error control technique, the idea of multi-thread and the embedded assembly language are applied to realize the temperature data transmission and graph transmission, which largely improved the speed of transmission and the reliability and stability of system.

建立了符合现场实际的回转窑壁厚数学模型；结合现场采用红外测温仪测量所得的温度数据和回转窑的实际结构数据，确定出适合该模型的定常系数(包括导热系数、换热系数、傅立叶系数、接触热阻等)，并得出与回转窑工况的相近的接触热阻公式ln=T~(0.5154)-36.7868；利用MATLAB软件仿真出回转窑壁厚，并将运算结果通过在VC++的编译环境下编译出MATLAB和DELPHI的接口函数传输到该监测系统中，实现了温度数据的转换和交换；运用科学计算可视化技术和Bresenham扫描转换算法对基本图形——圆和直线进行分析，从而实现了仿真后的壁厚数据可视化；在研究异步串行通信方式的基础上，设计了该系统上下位机功能和通信内容，并运用差错控制技术、多线程思想以及嵌入式汇编语言实现了温度数据和图形数据在上下位机之间的远程传输，提高了数据传输的速率和系统的可靠性、稳定性。

Add the clauses of appearance, lixivium ion content and pipe shell eccentricity, improve the thermal conductivity and dimension allowable indexes, add the safe service aphorism, modifies the regulation of inspection and change the "the maximum service temperature" to "temperature for shrinkage under hot load".

增列了外观、浸出液离子含量及管壳偏心度条款，提高了部分板的导热系数及尺寸允差指标，增列安全使用警语，修改了验收规则，并将"最高使用温度"改为"热荷重收缩温度"。

Strontium doped lanthanum manganate La_(1-xSr_xMnO_3, LSM is commonly used as ABO_3 type cathode in traditional high temperature solid oxide fuel cells. However, LSM is not suitable to operate in intermediate temperature range, due to the low conductivity and electrochemical activity.

传统的SOFC阴极材料多为钙钛矿结构ABO_3型氧化物，如La_(1-x)Sr_xMnO_3等，这类材料在1000 oC时极化电阻仅为几欧姆，但随着工作温度的降低，其极化电阻猛增到几千欧姆。

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主要产品有：回弹仪、导热系数测定仪、渗透仪、收缩膨胀仪、手持应变仪、防水材料检测仪、低温弯折仪、渣球含量分离器、热荷重试验仪、燃烧性能试验炉、各种测厚仪、石墨电极热膨胀仪、煤强度测定仪、电动击实仪、憎水性测试仪、矿棉容重测定仪、混凝土钻孔取样机、锯切机、磨平机、套丝切管机、液压弯管机、不透水试验仪、耐热性测定具、加热伸缩测定器、延伸仪、针入度仪、细度计、粘度计、干燥时间试验器、铅笔硬度计、摆式硬度计、附着力测试仪、漆膜划格器、耐洗刷测定仪、耐溶剂测定仪、耐磨仪、平磨仪、涂层落砂耐磨仪、耐沾污测试仪、冲击试验仪、穿孔仪、漆膜弯曲仪、涂膜涂布器、砂磨机、锥形磨、高速分散机、三滚研磨机、划痕试验仪、压痕试验仪、光泽仪、白度仪、鲜映性仪、反射率仪、铁钴比色计、涂料密度杯、抗裂性试验仪、流平仪、流挂仪、目视比色箱、最低成磨温度测定仪、低温脆性试验仪、目视比色箱、电子拉力机、门尼粘度仪、硫化仪、直读比重计、压缩耐寒试验仪、文物耐磨仪、文物划痕仪、摩擦系数测定仪、涂层检测划格板、涂层耐燃烧试验仪等多种试验仪器。

In the investigation,the finite-element software ANSYS was adopted to simulate the temperature field,and the effects of heat conductivity,specific heat and some boundary conditions such as sunlight radiancy and wind speed on the temperature field were analyzed.

应用有限元软件ANSYS对温度场进行模拟，分析了太阳辐射、风速等边界条件和导热系数、比热等计算参数对温度场的影响，并提出了相应的建议值。

Finally, the curve of between temperature and thermal conductivity at low temperature has been obtained.

根据试验，讨论了低温热导率的影响因素如温度、密度、吸水率等。

Effective heat capacity method was used to simulate heat transfer of freezing phase change growth in the metallic foams at the third boundary condition. The average temperature distributions vs. time in the metallic foams were obtained. The results showed effects of different porosity and thermal conductivity on the temperature distributions.

采用显热容法模拟了第三类边界条件下泡沫金属中水的冻结相变传热过程，得到了泡沫金属中骨架和流体的温度分布及其平均温度的变化，分析了不同骨架导热系数及不同孔隙率对介质温度分布的影响。

In this thesis, the engineering property of the frozen earth in the frozen railway roadbed in Anduo section (between DK1561+975-DK1562+530) of Naquhe region of Qinghai-Tibet railway was studied indoor. The change of engineering property of the earth samples with different water content , density and temperature were researched. The influence of concentration of the diffluent salt to the frozen strength was pilot studied. The thermal conductivity of the soil was experimented. With the result and data of the tests, the earth temperature field in Anduo section was demonstrated by numerical analysis, the structure parameter of the spall revetmentd and the rubble berm was given, the stability of the railway roadbed was evaluated.

本文以青藏铁路格尔木-拉萨段那曲河地区安多段(DK1561+975～DK1562+530)冻土路基为对象，对该地区冻土的工程性质进行了室内试验研究；对不同含水率、不同压实度的土样，研究在特定温度变化范围内工程性质的变化：初步分析了易溶盐含量对冻结强度的影响：测试了土样的导热系数；在室内土工试验的基础上，根据测试结果和数据，对安多段区域地温场进行了数值模拟，分析了该工点区间内合理片石护道、碎石护坡结构参数，评价了路基稳定性。

The results indicate that the different thermal expansions and elastoplastic properties and distributed randomness of various mineral particles composed of oil shale will lead to the nonuniformity of thermal field, deformation field and stress field in heating process, which makes the particles of oil shale deform incompatibly: and the release of product pyrolysis results in irreversible damages of oil shale material and structure. These are the main reasons for the thermal fracture of oil shale. When oil shale is heated through thermal conduction, temperature transfers slowly, so the spacing between heating well and production well should not be kept too long. When difference exists in oil shale reservoir's properties, heating well should be chosen in the high conductivity region. Oil shale's stratification is vital for developing permeation zone in in-situ retorting. Oil shale will generate additional expansion force as it reaches its pyrolysis temperature, and stratification will be cracked first, so the oil shale stratification should be utilized to enhance its permeability.

研究结果表明：组成油页岩各种矿物颗粒热膨胀和弹塑性性质的不同及其分布的随机性，导致油页岩加热过程中温度场、变形场和应力场的非均匀性，使得油页岩颗粒间变形不协调和油页岩热解产物释放引起油页岩材料与结构性能发生不可逆的劣化损伤，这是油页岩发生热破裂的主要原因；热传导方式加热油页岩，温度的传递比较缓慢，加热井和生产井的间距不宜过大，对油页岩储层性质存在差异时，注热井应选择较高热导率的区段；油页岩的层理对油页岩地下原位开发形成渗透带至关重要，油页岩达到热解温度会产生附加的膨胀力，首先在层理处开裂，应充分利用油页岩层理赋存条件改造其渗透性。

We are forbidden from giving money to these shoeless, skinny children, as this will perpetuate begging.

向光着脚，骨瘦如柴的孩子施舍是不可以的，因为要招来无休无止的乞讨。

It would be hard not to fall victim to some sharpeyed policeman.

要想不被某个目光锐利的警察抓到，谈何容易。