查询词典 thermal conductivity

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。

In the third chapter, by the analysis of the thermal lens effect of laser crystal, single-end-pumped laser crystal is analyzed and a thermal model suited for particular operating circumstance is founded. By the use of equation of heat conduction and with the boundary conditions, the half analytic solution of thermal field in the laser crystal is obtained through half-analytic thermal analysis, and a practical example is calculated together with analysis of the effect of some parameters on the distribution of thermal field.

第三章从分析激光晶体的热透镜效应出发，对单端泵浦激光晶体进行了分析，建立了符合工作条件下激光系统的热温场模型，通过热传导方程及晶体的边界条件，利用半解析热分析方法得出了晶体内部温度场的半解析解，并对实例进行了计算，分析了各种参量对温度场分布的影响。

The results show that the atmosphere has a big influence on the thermal stability of C_(60).C_(60) begins to decompose at 423.5℃in the air,the deomposed peak temperature is 668.5℃,but very stable in the helium atmosphere,only sublimate,the crystal shape of C_(60) has a certain influence to its thermal stability.The synthesized nine kinds of nitro-fullerene derivatives all have good thermal stability and their decomposed peak temperatures all exceed 350℃.The thermal explosion temperature for 5 seconds delay of product 4 is 253℃.The category,number and position of nitryl group in nitro-fullerene derivatives all have influence on their thermal stability.

利用差热分析仪和DSC-TG综合热分析仪对C_(60)及其硝基衍生物的热稳定性进行了研究，结果表明，环境气氛对C_(60)热稳定性影响很大，C_(60)在空气中423.5℃开始分解，放热峰值温度为668.5℃，在氦气中很稳定，仅表现为升华，C_(60)的晶型对其热稳定性也有一定的影响；合成得到的九种硝基富勒烯衍生物都具有较好的热稳定性，分解峰值温度均高于350℃；产物4的5秒爆发点测试结果为253℃。

The software includes two modules. One is to evaluate and manage how smoke bomb can shield the thermal images, which can be used as the guide in the development and improvement of thermal smoke bomb. The other is to process the data of thermal images under smoke-screen to locate target in the shortest time and improve the quality of the target thermal images, which can be used as the reference to further design for development and improvement of thermal image.

该软件主要包括两大功能模组：1红外烟幕对热像图遮蔽效果的评价和管理模块，利用该模块研究红外烟幕环境对红外与热像传输影响的定量测试与评价，指导红外烟幕弹的研制与改进；2红外烟幕遮蔽条件下热像图增强处理模块，该模块主要是研究采用一定的处理方法，改善烟幕遮蔽条件目标热像图的观察效果，争取最短时间发现或识别目标，为今后热像仪的研制设计、改进提供参考依据。

According to the result of SWOT analysis, the research area of thermal spring resources can be divided into four main classification includes Urban commercialized thermal spring , Suburban commercialized thermal spring ,Regular thermal spring , Conservancy thermal spring.

本研究依据SWOT评估的结果，将阳明山地区温泉水资源分为四个主要类型，包含了都会区之商业化温泉郊区之商业化温泉日常用途之温泉以自然保育为主之温泉，并将其发展条件的优缺点列出以及提出其发展策略。

They experience feelings deeply and intensely, and their emotions are often mercurial.

他们的感情深刻而强烈，情绪善变。

Surrounded with or as if with a rampart.

用城墙围绕的用城墙围绕的或类似于为城墙围绕的