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Based on the repetitive characteristic of the transmitted signal, a frequency domain signal model is developed. Its similarity to DOA estimation using an array and its ambiguity in parameter estimation are analyzed.

基于发射信号的周期重复性,建立了接收信号的频域模型,分析了该模型与利用阵列进行来波方向估计模型的相似性,以及该模型在参数估值时的模糊性。

In this study, we have fabricated phosphors containing indium and investigated the possibility of these phosphors using for FED.

这个研究的目的,是要开发含铟化合物或锗化合物的萤光粉,并研究其使用於场发射显示器的可性。

The face of all this suffering, she suffers, hold on tears, forget all the pain, more hard, strong, and finally, she found that radioactive elements polonium and radium, has created one after another shocking miracle, and more idol for generations of people.

面对这一切的苦难,她承受着,挺住泪水,忘记所有的伤痛,更加努力、坚强,终于,她发现发射性元素钋和镭,创造了一个又一个令人震惊的奇迹,也更为一代一代人的偶像。

In the interest of seeking the essential principle and technique about how to enhancethe muzzle velocity of projectile, preparation technics and fundamental characterstics ofprogrammed splitting stick propellants and polyether polyurethane close-grainedpropellants, this two kinds of high progressivity burning and high charging densitypropellants, were researched in this paper.

为了寻求提高弹丸初速的基本原理和方法,本文对按序分裂杆状和小颗粒固结药柱两种高渐增性/高密度发射药的制备工艺和基本性能进行了研究。

It takes advantage of radioactive isotopes of ionization ionizing air to generate ion, and electriferous in the neptuni static electricity.

它诳骗发射性同位荤的电离功用电离氛围天生离子,来洋和带电体上的静电。

We present a simple method to functionalize the surface and to modify the structures of multi-walled carbon nanotube grown on silicon substrates using argon plasma. The as-grown CNT films prepared by thermal chemical vapor deposition were treated with Ar plasma.

在此研究中使用非反应性的Ar电浆子蚀刻,处藉由热化学气相沉积法在矽基板表面所积的多层米碳管,并观察处过后的米碳管表面型态与结构上的改变及其对场发射特性的影响。

Within carboxylic groups, the coordination properties of carbonyl were studied and tn SEM graphs of picolinic acid, meta-methyl benzoic acid and 2-chloro-benzoic acid systems, a large amount of chains like structures probably caused by crystal growth have been firstly observed.

首次在杯[4]芳烃下沿羟基引进亲电性的三乙氧基硅基异腈酸丙酯,并且根据能量传递与匹配的机理合成了五种新型以改性超分子为功能片段的强键型杂化材料,其中与铽能量传递与发射情况最为优异。

The mainly characteristic of it is the high efficiency intermingles and homogeneous. Not only the microstructure but also the second phase is uniform.

其主要特征是均匀性掺杂,不仅反映在纳米电子发射材料的微观结构方面,而且表现在第二相的更加均匀分布方面。

Till now, there has not three-dimensional computation of radiation in system with complex geometry and fulled of inhomegeneous, absorpting and emitting medium existed in our country also. The author carries on three-dimensional computation of radiation in vectored nozzle for the first time, which undoubtedly establishes certain basis in this field.

此前我们国内还没有对复杂形状的系统内,不均匀吸收-发射性气体介质的辐射场的三维数值计算,本文率先对矢量喷管的辐射场进行了三维数值计算,为该领域的研究奠定了一定的基础。

We note from the further studies that in the crystals, which sharing the similar crystal structures and coordinational environments, the magnitude of the Stokes shift of the luminescence of the dopant ion is in line with the average covalency of the replaced lattice site. This is because that the nature of Stokes shift is the energy transfer from the luminescent ion to the host lattice. The value of this energy is determined by the frequency of the host lattice in which the frequency is controlled by the chemical bond characters.

更深入的研究发现,在晶体结构和中心离子配位环境非常相似的系列晶体中,掺杂离子发射光的Stokes位移值与其所取代格位的平均共价性成正比的关系,这是由于Stokes位移的本质是发光离子在发光过程中向基质以光波辐射的形式传递能量,这一能量的大小是由基质的振动频率决定的,而基质的化学键性质恰恰决定着基质的振动频率。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。