查询词典 thermal conductivity

The several kinds of Ag-NiFe2O4 cermets with different mass percent of Ag have prepared. Microstructural changes were observed by scanning electronic microscope and composition was determined with x-ray detector. Effect of different content of Ag on the density, property of thermal shock,conductivity and corrodent rate were tested. The results showed that the thermal shock performance and conductivity have improved in company with the addition of content of Ag.

制备了不同金属Ag含量的Ag-NiFe2O4金属陶瓷，利用扫描电子显微镜观察显微组织，由X射线衍射分析化学成分，研究了Ag的添加量对其体积密度、气孔率、热震性、导电率以及腐蚀速率的影响，试验结果表明，抗热震性和导电能力随着Ag含量的增加而增强，导电率的提高和腐蚀率的增大仍是一对突出的矛盾。

Thermal stress calculation in ice cover is a nonlinear problem, this includes edgeconditions nonlinearity, ice specific heat and conductivity nonlinearity, and ice elasticmodulus and linear thermal expansivity nonlinearity.

冰层温度应力问题是非线性问题，包括边界非线性、冰的比热C和导热系数K的非线性、冰弹性模量和热膨胀系数的非线性等。

The results show that the compound conductive fiber has typical structure of sheath-core consists of black greened polyaniline electric conductive deposition as the skin and the white polypropylene matrix fiber as the core, which makes the compound fiber preferable physical mechanical property. The intensity and the elongation ratio of the electric conductive fiber are decreased but the thermal stability is enhanced after modified. The compound fiber has the good acid resistance but poor base resistance. The thermal stability of the compound fiber prepared by 4-methyl-benzene sulfonic acid is better than that prepared by hydrochloride acid. Moreover, the compound fiber can be re-doped by other organic or inorganic acid after freed from the adsorbed acid. Furthermore, the electric conductivity of the compound fiber decreases with the temperature increasing but hardly changed with the humidity. The adsorptive ability and therefore the content of the polyaniline, the constant of electric conduction, and the durability of the compound fiber can be enhanced by thinning the diameter, section heteromorphosis, section heteromorphosis and plasma treatment of the surface or blending with COPET of the fiber.

结果表明：复合纤维是聚丙烯与聚苯胺的共混体系，具有典型的皮芯型结构，皮层为墨绿色的聚苯胺沉积层，形成连续的导电通道，芯层为白色的聚丙烯基质纤维，提供物理机械性能；导电改性后纤维的强度、强力和伸长率均有下降，但热稳定性得到提高；复合纤维的耐酸性比耐碱性好，以对甲苯磺酸做掺杂酸比盐酸掺杂聚苯胺热稳定性好，脱掺杂后的复合纤维，可用其它无机酸或有机酸进行再掺杂；复合导电纤维的电导率随温度升高降低幅度较大，但几乎不受湿度影响；基质纤维细旦化、截面异形化、表面等离子体处理或共混COPET等改性处理均能提高纤维的吸附性，进而提高复合纤维表面聚苯胺含量、电导率和耐久性。

This series oil feature excellent thermal stability over oxidization and low-temperature fluidity, low carbon residue, long life of 4-8 times of mineral compressor oil, 15% higher conductivity and 5%-10% more thermal capacity, good lubricity, high flash point(200~210℃), low solidifying point(-40℃), It conforms to the specification of ISO DAC/DAJ.

本产品具有良好的高温氧化安定性和低温流动性，积碳倾向小，使用寿命长，为普通矿物压缩机油的4~8倍，良好的润滑性，传导率较矿物油高15%，热容大5~10%，闪点高(200~210℃)，凝点低(-40℃)，主要指标均达到了ISO DAC/DAJ 水平！

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。

Their molecular compositions and structures were characterized by means of elemental analysis, EDTA titrimetric method, conductivity determination, FT-IR and UV spectroscopies; their thermal properties were studied by thermal analysis instrument.

通过红外光谱分析、紫外光谱分析、元素分析、EDTA配位滴定分析以及电导率的测定对铕三元荧光配合物的组成及结构进行表征。

The study provided 2 kinds of finish systems which were pouring and anchoring rock-wool panel respectively. In general, galvanizing steel-meshwork using machine anchor can use all kinds of Rock-wool panel made in China. The interface mortar used in Rock-wool can prevent worker's hand from hurting and improve the water-proof capability and bonding intensity of rock-wool panel. The low-heat conductivity of polystyrene foaming granule paste improved the integer and anti-crack of system. The 2 kinds of rock-wool system all can resolve the current rock-wool panel applied difficulty in outer-wall external thermal insulation. The rock-wool external thermal insulation which has very nice fire-proof capability can apply any kinds of builds, especially high-rise buildings.

研究提出了现浇和锚固岩棉板2种涂料饰面构造做法，其中采用机械锚固热镀锌钢网施工可充分利用国产各类型岩棉板；岩棉板的界面砂浆处理可起到防止岩棉纤维扎手、增强岩棉板的防水性能和提高岩棉板与找平层的粘结强度的作用；聚苯颗粒的低导热系数过渡层提高了系统的整体性和抗裂性。2种构造做法经试验和工程试点证明均可解决目前国内岩棉难以应用在外墙外保温系统中的技术问题，具有优异防火性能的岩棉外保温系统可应用于任何类型的建筑中，在高层建筑和防火要求高的建筑中其优势更为明显。

Part II. Synthesis, characterization and fluorescent properties of rare earthcomplexes of rutin Rare earth complexes of rutin have been synthesized by the reaction of rare earth chloride with rutin in alcohol solution (pH=7～8). The composition and thermal stability of the complexes were characterized by elemental analysis, molar conductivity, thermal analysis, IR, UV.

第二部分：稀土芦丁配合物的合成与表征及其荧光性质以稀土金属氯化物和芦丁为原料，在乙醇溶液中(pH=7～8)合成了6种稀土配合物，通过元素分析、IR、UV、热重-差热分析、摩尔电导率的测定对配合物进行了表征，确定了配合物的组成，分析了配合物的热稳定性和热分解行为。

Currently some obvious defects can be found in existing double flat thermal conductivity instrument such as long time measuring,complicated operation etc.

现有的平板式导热系数测定仪存在测量时间长，操作不便等问题。针对这些问题，本课题研制了一种以微处理器ARM为核心的新型双平板式导热系数测定仪。

In view of deficiency in former model that thermal conductivity has to be a fixed value, Kirchhoff transformation is adopted in our calculation to make up the drawback.

由于以前的计算中存在着器件热导率只能为定值的问题，本文利用Kirchhoff变换，弥补了这方面的缺陷。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。