查询词典 wide band

Due to the quantum effect of nanocrystallites, the 〓/MCM-41 mesophase not onlydisplayed the characteristic narrow emission based on the f-〓 electronic transitions,but a wide emission band of the MCM-41 matrix.

在制膜的过程中，溶胶液的浓度、陈化时间、铺膜厚度、溶剂挥发速率以及基片的清洁度等因素直接影响到所得薄膜的质量，如透明性、均匀性和致密性等。

The wide flexible openwork band formed of three latticework motifs set with cabochon rubies and small circular cut diamonds, connect by geometrical set with further circular cut and baguette diamonds.

柔软灵活的镂空宽手链，由3个镶嵌鹅蛋红宝石及小颗圆形切割钻石的格子图案组成，中间由几何图案连接，以更多圆形切割及长方形钻石镶嵌而成

The first disadvantage of MMI device is wavelength sensitive, which leads to restricted applications. To reduce the wavelength insensitivity in optical network applications, the demand of light source with a specific wavelength is needed, especially for power splitters. For this reason, a wideband criterion for MMI splitter is proposed. The basic principle is based on reducing the interference length difference and making it shorter than the spot size for constructive mode interference. Simulation results show the spectra of proposed MMI splitter is wide enough (1.26-1.61um) to cover the fiber communication band and the size of the splitter is more compact than that of the conventional MMI or Y-branch splitter.

多模干涉元件的第一个缺点为波长敏感，此缺点会限制其在实际上的用途；因元件在网路上的应用时，通常都需要降低波长敏感性，以减低对光源波长准确性的要求；有鉴於此，本论文提出多模干涉分光器的宽频标准；基本原理是建立在缩短其多模干涉区的长度差，并使之小於建设性干涉的光点大小；透过模拟后发现，操作频宽可涵盖光纤通信全波段(1.26-1.61um)，且长度小於Y形分支结构的分光器。

Time-Frequency parameter estimation and direction finding for nonstationary signals impinging on an antenna array over a wide frequency band (2~18GHz) is under in-vestigation, and a new method for parameter and 2-D Angle-Of-Arrival estimation of spatio-temporal undersampled LFM sources is proposed in this paper.

摘要针对宽频段(2-18GHz)内非平稳来波信号的参数估计和测向问题，提出一种时空欠采样线性调频信号参数与二维到达角联合估计方法。

The result of UV-visible spectroscopy show that the absorption band of the titanium dioxide hydrosol is extend to visible light region, what'more the absorption band in ultraviolet region is strong and wide.

紫外-可见光漫反射吸收光谱分析表明，该纳米二氧化钛水溶胶在紫外光区具有强而宽的吸收带，且其吸收边(500nm)扩展到了可见光区，扩展了对光谱的吸收范围。

In this paper we propose a method called Generalized Spectral Correlation Signal Subspace Fitting for DOA estimation,which is applicable in both wide and narrow band scenarios.Especially,in narrow band cases,the method is capable of enlarging the effective aperture of sensor array considerably.

本文提出了一种用广义谱相关信号子空间拟合进行波达方向估计的方法，该方法同时适用于宽带与窄带信号的DOA估计，在窄带情形下还能够大大提高阵列的等效孔径。

In this paper, an algorithm to achieve both two dimensional high resolution and wide swath is proposed. Every small satellite work in the active state, they transmit and receive different frequency band signal simultaneity. First, the azimuth ambiguity is eliminated in each frequency sub-band, then the signal is rectified to zero Doppler frequency, after that this algorithm does the range spectral synthesis to achieve high range resolution.

该文分析了一种沿航向排列分布式小卫星宽测绘带二维高分辨率成像技术，每颗卫星同时发射接收不同频率的线性调频信号，先分别在每个子带解方位多普勒模糊，并将方位多普勒中心频率调整至零频，然后在距离向进行子带拼接得到大带宽的线性调频信号从而得到高的距离向分辨率。

Provided are carbide derived carbon materials prepared by thermochemically reacting carbide compounds and a halogen containing gas and extracting all atoms of the carbide compounds except carbon atoms, wherein the intensity ratios of the graphite G band at 1590 cm -1 to the disordered-induced D band at 1350 cm-1 are in the range of 0.3 through 5 when the carbide derived carbon is analyzed using Raman peak analysis, wherein the BET surface area of the carbide derived carbon is 1000 m 2 /g or more, wherein a weak peak or wide single peak of the graphite (002) surface is seen at 2 = 25 DEG when the carbide derived carbon is analyzed using X-ray diffractometry, and wherein the electron diffraction pattern of the carbide derived carbon is the halo pattern typical of amorphous carbon when the carbide derived carbon is analyzed using electron microscopy.

提供了得自碳化物的碳，其通过热化学反应碳化物化合物和含卤族元素的气体并提取除了碳原子之外的碳化物化合物的全部原子制备，其中当使用拉曼峰分析法分析该得自碳化物的碳时，在1590cm -1 的石墨G波段与在1350cm -1 的无序引发的D波段的强度比为0.3至5，其中该得自碳化物的碳的BET表面积是1000m 2 /g或更大，其中当使用X射线衍射法分析该得自碳化物的碳时，在2θ＝25°观察到石墨(002)面的弱峰或宽单峰，以及其中当使用电子显微法分析该得自碳化物的碳时，得自碳化物的碳的电子衍射图是代表无定形碳的晕图案。该发射体具有良好的均匀性和长寿命。可以使用比用于生产常规碳纳米管的方法更廉价的方法制备发射体。

Diamond has many outstanding physical, chemical, optical, mechanical, and electrical properties such as the highest thermal conductivity, the extreme chemical inertness, the highest known hardness, the lowest compressibility of known material, high in Young's modulus, low in friction coefficient, wide in band gap, and a wide optical transparency bandwidth.

中文摘要钻石拥有许多优异的物理、化学、光学、力学与电学特性，例如它拥有最高的热传导系数、具化学惰性、具有最高硬度、高杨氏系数与低摩擦系数、具有宽能隙与宽的光学穿透频域。

High-resolved X-ray diffraction measurements show that the crystal quality of high aluminum mole fraction(x=0.1) is poor and it may cause a large dark current. The window layer acts as a band-choice role. It induces a high responsivity and a wide response band for a higher aluminum mole fraction.

高分辨率X射线衍射仪对材料的测试结果表明，高铝组分(0.1)窗口层薄膜材料的晶体质量较差，导致暗电流增大，而其窗口层的窗口选择作用则可以得到较高的响应率和较宽的响应波段。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。