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使稀疏

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Scale emergence makes the parts relationship network becoming a scale-free network, and the emanative network whose local world is dense and other is sparse is changed gradually on the network structure.

标度涌现使零部件关系网络成为无标度网络,在结构上逐渐演变为局部密集、大部分稀疏的发散型网络。

As an efficient 2-D capacitance extract method, ES-MEI can solve a multiconductor in multilayered dielectric media problem using the comparable unknown number like in the integral equation method as well as the sparse matrix like in FD.

作为进行二维电容参数提取的有效方法,使其能以与积分方程法相当的变量数以类似有限差分法的稀疏矩阵处理分层介质中多导体传输线的电容提取问题。

The results showed that:(1) some governing points, which were measured by submeter precision GPS, were utilized to correct the 1 m precision remote sensing image and it could satisfy the desired precision of geometrical correction, therefore, this method could be used as geometrical correction in the region where was short of the big scale relief map;(2) the density of the original data was the main factor to affect precision of the volume, and the precision of the calculated volume of earthwork could be improved to more than 90% when using the test points and feature points; the sparser the data density were, more significant could be improved; On the base that elevation of test points were measured by the submeter precision GPS, the error of the volume, which was produced by vectoring relief map to obtain DEM, could be calculated, and the calculation precision of the earthwork could be improved markedly.

结果表明:利用平面精度达亚米级的GPS测量控制点坐标对1米分辨率的遥感卫星影像进行几何校正,能够满足其几何校正的精度要求,可以解决缺乏大比例尺地形图地区的高分辨率遥感卫星影像的几何校正问题;通过对模型数据的分析,数据密度是影响体积精度的主要因素,利用检测点高程和特征点可以提高土方量计算的精度,使土方量计算的精度达到90%以上,数据密度越稀疏,精度提高越显著;采用高程精度达厘米级的RTK(Real Time Kinematic实时动态差分)测量检测点的高程,对用地形图扫描矢量化形成的DEM模型进行检测求出误差体积,可以大大提高土方量的计算精度。

Numerical results indicate that in some cases detonation wave may quench when detonation wave front diffracts at the entrance of expanding chamber due to the extreme declination of temperature and pressure.

结果表明,爆轰波传播至突变截面扩张管道时,由于稀疏波的作用可能会使爆轰波局部熄爆甚至完全熄爆,对于某些敏感度高的反应气体爆轰波可以二次起爆。

Evolution has since stripped humans of their pelts.

进化使人类的毛发变得越来越稀疏。

The shockwave of the meteorite strike on the terrane of the surface passes the dynamic energy to the surface and forms the target terrane shatter cone; due to the fact that the terrane of stricken surface can not maintain the state of stress, a cluster of rarefaction wave was formed behind the shockwave to decompress terrane substances from high pressure state, this cluster of rarefaction wave ejects with high speed from the interface between the substances such as meteorite, surface terrane and lava, the shockwave compresses the target terrane substances, generating super-high temperature and forming a jet current of rock mass, rock powder, lava or rock fog with high pressure and temperature, the jet current lasted until the shockwave rebounded from the backside of rock, and the target of meteorite-stricken surface is formed on surface.

陨石撞击地面岩层时的冲击波把动能传给地表产生靶岩震裂锥,由于被撞击地表岩层不能维持应力状态,冲击波后面就发展一簇稀疏波使岩层物质从高压状态下减压,在陨石、地表岩层、熔岩等物质交界处高速喷出,冲击波压缩靶点岩层物质产生超高温,成为压力大温度高的岩块、岩粉、熔岩或岩雾喷射流,直到冲击波从岩石背侧反射、地面上形成陨击靶点。

Mowing suppressed seedling emergence of tall-growing Stipa krylovii by affecting seed availability due to reproductive parts removal when mown in the previous year, whilst exerted a positive effect on low-growing Cleistogenes squarrossa probably as result of increased light availability and less competitive pressure from adult individuals, because mowing largely lowered the vegetation height and density. 3."U"shaped curve for seedling mortality across the entire growing season was thought to be associated with seasonal changes of air temperature but a small peak from mid-June to early July could probably be attributed to drought due to previous rainfall shortage.

自5月下旬至8月中旬,三种禾草的实生苗密度总体上都呈上升趋势,但刈割和放牧会使克氏针茅的实生苗密度受到抑制,表明前一年的刈割去除部分生殖器官影响形成实生苗的种子来源;刈割和放牧对生长较低矮的糙隐子草实生苗会产生正向效应,对低矮和稀疏植被进行有规律的刈割会增加植物群落内部的光照,减轻实生苗与成年母株的竞争。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。