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But it is proved in practice that the cartographic point group usually shows nonuniformity of local fractal characteristics.

这些分形对象一旦受到不同因素的交叉影响,往往在空间形态与分布上表现出非均匀现象。

Results The internal nuclide dose results showed that the maximum absor

结果MC EGS4法计算结果提示:病灶内剂量分布不均匀。

Furthermore, the relation between the moving period of the nuzzle and the isothermal characteristics of the heating object was obtained.

像这样的射流冲击加热装置,如果射流喷嘴宽度小于被加热物体的宽度,那么被加热物体的温度分布将会不太均匀…。

The catalytic property was tested by hydrogenation ofα-octene, cyclohexene and nitrobenzene in ethanol, octane and cyclohexane were prepared at normal temperature and under hydrogen pressure in a 100% yield, respectively.

聚乙烯吡咯烷酮负载纳米钯的超细纤维状催化剂,钯纳米颗粒直径在15 nm以下,并且纳米颗粒负载分布均匀,在室温下催化α-辛烯的加氢反应,产率可达到100%。

Through onflow κ-ε equation and structuralization are not even reseau, the simulation of model of numeric wind tunnel that uses test and verify of wind tunnel experiment 4 punch position is different, but the light steel architecture with same size, be based on load of above model wind to distributing the configuration that puts forward to defy wind actively.

通过湍流κ-ε方程和结构化非均匀网格,采用风洞实验验证的数值风洞模型模拟了4个开洞位置不同,但尺寸相同的轻钢建筑,并基于以上模型风荷载分布提出主动抗风的结构形式。

The conventional 40Ar/39Ar age of muscovite in high-pressure metamorphic orthogneiss, surrounding rocks of the Qinglongshan eclogite, is identical with its Rb-Sr and Sm-Nd ages.

作为东海青龙山榴辉岩围岩的高压变质的正片麻岩,其白云母的常规~(40)Ar/~(39)Ar年龄和Rb-Sr、Sm-Nd年龄一致,激光微区Ar同位素分析表明,白云母的Ar同位素分布也是均匀的。

The theoretical and computational results show that an important reason resulting in eccentric wear of the inner cylinder and the pumping rod lies in the nonuniformity of the stress distribution on the outwall of the inner cylinder which yields excentralization effect of the pumping rod when swabbing fluid flows in eccentric annuli with the pumping rod moving axially in a well.

在实验上,通过不同重量百分比浓度的HPAM水溶液在内管做轴向往复运动的偏心环空中非定常流实验,把由理论公式算得的时间平均流量与实验中测得的时间平均流量做了比较,验证了本文数值计算幂律流体在内管做轴向往复运动的偏心环空中非定常流方法的正确性;上述的理论与计算表明,抽油机井杆管偏磨的一个重要原因是,在聚驱工况下,抽汲液体在抽油杆做轴向运动的井筒中流动时,抽汲液体作用在抽油杆外壁上的压力分布的不均匀性所引起的抽油杆在井筒中的偏心效应。

The numerical simulation of velocity field and temperature field of the office using hot-water floor panel heating system is carried out.

对采用热水地板辐射供暖系统的办公室的速度场、温度场进行了数值模拟,室内气流分布比较均匀,没有吹风感觉,竖直方向温度梯度较小,热舒适度较好。

ISO834 and parametric equation approach are lack of pertinence. The results may be too conservative. The temperature obtained by zone model is low, so that it is not suitable for the performance-based fire protection design on this structure. Field model considers the heterogeneity of environmental temperature, and its result is close to the real fire, so that it is commended to the performance-based fire protection design on steel staggered-truss structure.

国际标准升温曲线和参数化室内升温曲线不考虑火源功率、建筑通风口等因素,缺乏针对性,分析结果偏于保守;区域模型所得温度偏低,不宜用于交错桁架结构的性能化抗火设计;场模型考虑了火源功率及环境温度分布的不均匀性,和实际火灾较接近,计算结果相对较为准确,可用于结构的性能化防火设计。

By analyzing the problem of hydrological 3D spatial dispersion in 3D finite differential numeric simulation of porous groundwater flow, as well as discontinuous spatial distribution and asymmetric thickness of porous aquiferous strata and partitive groundwater stratum, the paper presents the GIS-based technique of 3D spatial dispersion of porous aquiferous stratum system. Besides, the paper puts forward the 3D spatial dispersion method of irregular hexahedral unit based on GIS to guarantee to the greatest degree the uniqueness of the stratum types among the dispersed units and improve the precision of 3D spatial dispersion.

分析了目前孔隙地下水流三维有限差分数值模拟中对含水层系统三维空间离散存在的问题,针对自然界孔隙含水层与隔水层空间分布的不连续性与厚度的不均匀性,研究了基於GIS的孔隙含水层系统三维空间离散实现的技术路线,提出了基於GIS与不规则六面体元的孔隙含水层系统的三维空间离散方法,最大限度地保证了离散体元中含水层类型的单一性,提高了孔隙地下水流模拟模型三维空间离散的精度。

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