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Comparing EMD method with traditional FFT method in the analytical process, Hilbert-Huang transformation is found to be superior in performance. Structural response of the warship subjected to underwater explosion is simulated numerically, and EMD method is applied to analyzing the structural impulse signals.

该方法不把信号分解成正弦或余弦函数,因此既能分析线性稳态信号又可用于非线性非平稳信号的分析,且避免了高频干扰结果的出现,被认为是近年来对以Fourier变换为基础的线性和稳态谱分析的一个重大突破。

A conclusion can be drawn that tryptopanase expressed only by constructed plasmid during "catabolite repression".

在葡萄糖存在的条件下由于分解代谢产物阻遏,基因组上的色氨酸酶基因不表达,加入IPTG只表达质粒上的基因,如果在合适条件下测得色氨酸酶活性,则可以证明质粒上的基因能表达出有活性的色氨酸酶。

Accordingly,they can result in the celebrated Jordan theorem and the third decomposition theorem of space directly and, moreover,they can give a new deep insight into the exquisite and subtle structure of the Jordan ...

因而,它们能够直接导致著名的Jordan定理及空间的第三分解定理,且能给出对Jordan形精致微妙结构的新的深刻洞察。后者表明,复线性变换的Jordan标准形是一种在双重任意选择下具有不变性的结构。

Thermodynamic process of direct aluminium extraction from aluminium sub-sulphide, which is unstable and easily decomposed into Al and Al2O3 at a low temperature, was analytically studied. The temperature, at which alumina, FeS and carbon react to form aluminium sub-sulphide in different pressure, was evaluated with "Substance Gibbs' Free Energy Functional Determinant" method.

本文利用铝的低价硫化物在高温下存在,低温下不稳定容易分解得到金属铝的特性,从热力学角度引入"物质吉布斯自由能函数法"讨论在不同压力下,氧化铝、硫化亚铁与还原剂碳的反应生成低价硫化物的条件。

Owing to the approximate and detail coefficients at each level after decomposition using undecimated wavelet transform have the same length as the original signal, the transform can possess time invariant property and retain more characteristics in time domain, and therefore improve the effect of denoising.

由于非降采样小波分解后的各层系数和原始信号的长度均相同,因此在具备平移不变性的同时还能保留更多的时域信息,从而可以提高信号的降噪效果。

This paper mainly inquired into the characteristics of the ferment bed pig - raising technique and its applying in realizing the cleaner production of pig farms. ferment bed ; cleaner production ; pig - raising technique ; waste treatment

但由于发酵床技术主要靠微生物降解猪场废物,而目前所使用的菌种分解效率不是很高,使得单位面积饲养的猪数量有限,另外由于猪舍是半开放式的,受外界的环境变化的影响,如何使菌种在不同的气候条件下都能发挥较高的效率也是一个需要解

The occurring of autoreduction of Pt〓 ions is avoided on L zeolite, therefore the dispersion and aromatization reactivity of Pt/L zeolite is superior to that of Pt/β zeolite.

二。同样研究载Pt化合物在L沸石上的分解,发现Pt〓离子不被自还原,因而Pt粒子能保持较高的分散度,芳构化性能也更为优异。

The obtained results a re compared with analytic solution and those from integral equation and other me ans. It is shown that the staggered grid finite difference method combined with the Biconjugate gradient iterative solver processed with divergence correction and incomplete Cholesky decomposition procedures can efficiently improve the three dimensional electromagnetic calculation with high accuracy and stability.

经与解析方法、积分方程等其他方法的计算结果对比表明,交错网格有限差分法结合散度校正和不完全乔累斯基分解预处理的双共轭梯度迭代方法进行正演计算,速度快、精度高、结果稳定,能适应三维复杂介质的数值模拟,为三维电磁反演奠定了基础。

The form of intumestant char layer could depart polymer base and burning part while prevent heat transfer. Obviously,the fire –retardant effect of IFR is also that it intermits heat transfer.

因此,其阻燃作用主要属于凝聚相机理;APP、MN等分解时产生的NH3、H2O等不燃性气体,这些气体在能被捕集之前逸出到材料表面的气相,稀释了可燃气体的浓度;膨胀碳层的形成,起到阻止热传递的壁障作用,把聚合物基质与燃烧区隔开。

Process in the jasmine flower tea foundation in green tea but, especially the high class jasmine spends in process of process certain physics and chemistry in occurrence in quality in its inside function, such as:The polyphenol material in the tea, tea is single rather under the water the wet term of decomposition, do not dissolve to decline the solution in the aqueous protein amino acids, can die down that drink the hour of green tea feels, the function has the variety, the fresh and thick in its taste is thick and alter fluently, this is also a north to like to drink the jasmine flower tea causal a.

茉莉花茶在绿茶的基础上加工而成,特别是高级茉莉花在加工的过程中其内质发生一定的理化作用,如:茶叶中的多酚类物质、茶单宁在水湿条件下的分解,不溶于水的蛋白质降解成氨基酸,能减弱喝绿茶时的涩感,功能有所变化,其滋味鲜浓醇厚、更易上口,这也是北方喜爱喝茉莉花茶的原因的之一。

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推荐网络例句

I didn't watch TV last night, because it .

昨晚我没有看电视,因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来,在北京的很多小区里,电梯液晶电视被撤了下来。

I'm running my simile to an extreme.

我比喻得过头了。