查询词典 conductivity

The Ultra-Fine-Grained copperwith fine structure performs excellent properties,such as ductibility,electrical conductivity and heat conductivity and so on.It has become an important raw material in the following industrial departments as electric apparatus instrument,chemical industry, shipbuilding,aviation and machinery,etc.,and has wide application prospects.

超细晶铜材因具有微小的细晶结构而表现出了优异的延展性、导电性以及导热性等性能，已经发展成为了电器仪表、化工、造船、航空、机械等工业部门中的重要原料，具有广阔的应用前景。

The methods which are used to measure conductivity and the problem dividing erth's surfce into regions for equiv lent conductivity are discussed.

本文给出了我国中部地区大地等效电导率的测量结果，分析了所用的测量方法，讨论了等效电导率的分区问题，并为长波授时与导航业务制作我国大地等效电导率分布图提出了具体建议。

Using a model of concrete in which the aggregates are spherical and nonconductive particles, the ratio of the interfacial transition zone electrical conductivity and the matrix electrical conductivity σ_/σ_ were calculated.

利用一个将骨料看成非电导球形颗粒的混凝土模型，计算了界面过渡区的电导率与水泥浆基体电导率的比值。

It shows that the critical exponents of conductivity, u, are in good agreement with the mean-field percolation value and in clear disagreement with the universal value in three dimension. This nonuniversal behavior can be interpreted as a result of the interaction between CB and polymer. The influences of the property and volume fraction of CB and radiation crosslinking on conductivity and critical exponent were also studied.

发现电导率临界指数u与三维普适值不符，而与平均场逾渗的指数相吻合，认为电导率的非普适行为主要是由于炭黑粒子之间和炭黑—聚合物之间的相互作用所引起，考察了炭黑的基本性质、含量和辐照交联对电导率及其临界指数的影响。

Study on the Percolation Conductive Behavior of the Conductive Composites Using classic statistic percolation theory, the conductivity behaviors of the PET/EG、PA6/EG and PA6/PET/EG composites were investigated, and the percolation thresholds and critical exponents were obtain. The nonuniversal critical exponent should be attributed to the anisotropy of conductivity, the tunneling conduction, the particular structure, the anomaly distributing of the particles and so on.

四、聚合物—石墨导电复合材料的逾渗导电行为运用统计逾渗理论探讨了PET／EG、PA6／EG及PA6／PET／EG导电复合材料的导电机理，得出了各体系的逾渗值和临界指数，并从导电性能的各向异性、逾渗值以上的隧道导电机理、独特的形态结构、导电粒子的不规则分布等方面分析了造成临界指数非普适行为的可能原因。

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 oxide ionic conductivity was increased with the increase of temperature, but the protonic conductivity displayed a maximum at 900 ℃, due to the combined increase in mobility and depletion of the carriers. The fuel cell could work stably.

氧离子电导率随着温度的升高而增大，而质子电导率在约900℃时出现最大值，这是由于在陶瓷中质子迁移率的增大及质子浓度的降低共同影响的结果。

The electronic conduction could be neglected in this case, thus the total conductivity in wet hydrogen was approximately regarded as protonic conductivity.

由于在此条件下的电子电导很小可忽略不计，该陶瓷样品在氢气气氛中的电导率可近似视为质子电导率。

With the increasing of content of selenium, the electrical conductivity and thermal conductivity increase but the Seebeck coefficient decreases.

随着Se含量的增加，样品的电导率和热导率逐渐增加，而Seebeck系数逐渐降低。

The absolute value of the Seebeck coefficient increases with Sr content, while thermal conductivity and electrical conductivity decreases.

Seebeck系数的绝对值升高，热导率降低，电导率下降。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。