查询词典 thermal conductivity

Based on thermal conduction theory, a thermal model is built up to get the effective thermal content and the effective thermal conductivity to be 1.0×10^(-3) W/K and 8.1 μJ/K, respectively, and the temperature-fluctuation noise is nearly 1.73×10^(-10)W/Hz(superscript 1/2). According to the device operating principle and energy equipartition theory of thermodynamics, the mechanical-thermal noise is 9.96×10^(-9) W/Hz(superscript 1/2), and the background noise is nearly 3.22×10^(-11)W/Hz(superscript 1/2), so that the normalized detectivity is deduced to be 9.03×10^6 cmHz(superscript 1/2)/W.

从理论上建立了器件的基本热模型，推导得到器件的等效热熔和等效热导分别为8.1μJ/K和1.0×10^(-3)W/K，温度噪声约为1.73×10^(-10)W/Hz(上标 1/2)；通过器件的工作机理和能量均分原理，推导得到热机械噪声的等效噪声功率约为9.96×10^(-9)W/Hz(上标 1/2)，器件的背景噪声约为3.22×10^(-11)W/Hz(上标 1/2)，从而得出器件的归一化探测率约为9.03×106cm。

SiC ceramic has been extensively applied in precision bearings, sealing element, steam-turbine rotor, burner nozzle, heat interchanger parts, atomic reactor materials and etc. because of its excellent properties in high temperature mechanical properties, antioxidatio, abrasion resistance, thermal stability, smaller coefficient of thermal expansion, larger thermal conductivity, hardness, thermal shock and chemical corrosion.

SiC陶瓷具有优良的高温力学性能，抗氧化性强、耐磨损性好、热稳定性佳、热膨胀系数小、热导率大、硬度高以及抗热震和耐化学腐蚀等优良性能，被广泛应用于精密轴承、密封件、气轮机转子、燃烧喷嘴、热交换器部件及原子热反应堆材料等，并日益受到人们的重视，应用前景十分广阔。

Thermal conductivity is a very important physical parameter.The measurement of thermal conductivity of poor conductor is a significant experiment in thermology.

导热系数是一个重要的物理量，不良导体导热系数的测定，是热学中比较重要的实验。

A method of measuring the materials thermal conductivity is proposed, through optimal approach of the measurement of the surface temperature with the analytical solution to calculate the materials thermal conductivity in the third boundary condition.

提出了一种根据第三类边界条件下物体瞬态温度场的变化规律，利用物体表面温度的实测值推算物体导热系数的快速测定方法。

In this study, the highest thermal conductivity of W/m K was attained when the unpurified MWNTs loadings reaches 4.0 wt %, which is over 10 times higher than the thermal conductivity of PMMA.

本研究对奈米复合材料的热传导系数进行研究，结果显示添加4.0 wt%未纯化的多壁奈米碳管对於复合材料热导性质的提升量最高，可达到基材热导系数的十倍以上。

In this paper, finite element software ANSYS is used to simulate the thermal conductivity and pressureless infiltration technique is used to produce aluminum infiltrated silicon carbide composite with high volume fraction of SiC. The influence of interfacial thickness and temperature on thermal conductivity and CTE have been investigated and analysed.

本文采用有限元软件ANSYS对铝渗碳化硅复合材料的有效热导率进行了数值模拟，用无压浸渗法制备了高体积分数的铝渗碳化硅复合材料，研究了界面层厚度和温度等对铝渗碳化硅复合材料的热导率和热膨胀系数的影响，并进行了分析。

The main is focused on the discussion on the crystal structure, porosity, temperature profiles, thermal conductivity, salinity and density of sea ice in Liaodong Bay based on the author's research on ice temperature profile in field, thermal conductivity coefficients in field and in laboratory, and the ice structures studied under the computerized tomography scanner.

重点以作者完成的海冰现场温度场、现场冰层导热系数和实验室导热系数以及应用正交偏光和CT扫描研究冰组构等研究成果为主体，讨论了辽东湾海冰的晶体结构、孔隙率、温度场和导热系数、盐度、密度等工程海冰指标。

Long-necked valve cover design mainly the design of the neck length L, L refers to the stuffing to the bottom of the sealing seat surface distance (Figure 1), which, and the material thermal conductivity, thermal conductivity and surface area factor, cooling 隔膜阀 area, and other factors, more complicated calculation, generally obtained from the experiment.

长颈阀盖的设计主要是颈部长度L的设计，L指的是填料函底部到上密封座上表面的距离（如图1），它和材料的导热系数、导热面积及平衡阀表面散热系数、散热面积等因素有关，计算比较繁琐，一般由实验法求得。

The measures for reducing thermal conductivity were shown in the thesis through the analysis of the mathematical model of thermal conductivity, including: addition of dopant atoms, increasing porosity and minishing coating thickness.

通过分析导热系数的数学模型，分别从添加掺杂物、孔隙率和涂层厚度的角度提出了降低导热系数的方法。

At room temperature directly touch the surface of heat sink, cooler feeling relatively good thermal conductivity, I feel relatively poor thermal conductivity of heat.

直接在室温下用手摸散热片的表面，感觉比较凉的导热性较好，感觉比较热的导热性较差。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。