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中数连续

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Then,they are presented,to satisfy the demands of forestry development in new century,that the volume estimation method by using one-way volume table should be improved,and that some important forestry tables such as volume table and biomass table should be revised or supplemented.

从分析我国森林资源连续清查中的材积估计问题入手,提出为满足新世纪林业发展的需要,必须对目前用一元材积表估计材积的方法加以改进,并进一步补充完善材积表和生物量表等基础林业数表。

Three of the cases took place on consecutive days last week, prompting anguished questions about dark forces welling in Chinese society, and spurring authorities to clamp down on school security and discourage further media coverage of the crimes.

数起案件中,有三起于上周连续发生,让人对中国社会不断喷涌的各种邪恶力量产生了痛苦的质疑,同时促使当局强化校园安全,并阻止媒体对这些案件的进一步报道。

On the basis of analyzing the theory of the modeling of the propeller surface, this paper transforms the section data given by design to the data in Descartes coordinates. Interpolates the section data to get enough data and fits the blade surface with the least square method. A perfect C2 blade surface can be obtained by adjusting the deviation weight and fairing weight. According to the cylinder rough, two rough cut methods are preferred.

本论文在深入分析螺旋桨曲面成型原理的基础上,将设计时给定的桨叶曲面的切面数据转化为笛卡尔坐标系中的坐标,利用B样条方法对截面数据点插值并加密,得到足够的数据点,进而利用最小二乘法拟合出桨叶曲面,通过调整偏离权和光顺权得到了理想的二阶连续的桨叶曲面。

In order to disclosure the reason why the electrocatalysis activeness and selectivity droped after being used several hundred hours continuously, the x-ray diffraction, scanning electron microscopy and energy dispersive spectroscope have been used to characterize the surface condition variations of Monel metal. The results indicated: Monel metal belongs to the Cu-Ni alloy around the electrolysis experiment.And after being used for 600hr, the surface layer element composition and geometry distribution of the alloy changed, namely in the alloy the Cu element /which superficial free enthalpy was smaller,"concentrated" to the alloy surface,and formed one kind of marble structure microcrystallite.Thus the electrode surface becamed rough a

为了揭示蒙乃尔合金阴极在连续使用数百个小时后电催化活性剂选择性下降的原因,采用X射线衍射仪、电子扫描电镜和电子能谱分析仪对电解实验所用的蒙乃尔阴极材料在电解实验前后的表面状态进行了表征,结果表明:所使用的蒙乃尔合金阴极材料在电解实验前后均属于Cu-Ni合金,使用600hr后,由于表面层元素组成和几何排布发生了变化,即合金中表面自由焓较小的Cu元素向合金表面&富集&,形成一种大理石结构的微晶,表面粗糙、不均一,这是造成其对硝基苯电还原的催化活性及选择性随着使用时间延长而逐渐下降的主要原因,同时也为此类电极的修饰改进提供了方向。

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推荐网络例句

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时,滚道或滚动元件褪色是很常见的特征。

The lawyer's case blew up because he had no proof.

律师的辩护失败,因为他没有证据。