Combined with curvature effect the corrugation breaks the local symmetry of two types of carbon atoms which induces the metal-semiconductor transition and true band gaps emerge for carbon nanotubes .

由于褶皱结构和曲率效应一起破坏了两类碳原子的结构对称性，导致了碳纳米管的金属半导体 相变以及真实 能隙的产生。

A linear fitting algorithm is applied to the frequency response of a 10-order high-pass FIR filter with 10 kHz sample rate and a transition band from 800 Hz to 3 800 Hz .

对采样率为10kHz， 过渡 带为800Hz至3800Hz的10阶FIR高通滤波器幅频响应曲线 过渡带局部进行线性拟合。

The transition metal doped wide band gap semiconductors with the dual characteristics of semiconductor materials and magnetic materials and regulation of electronic and spin in the same kind of material can be achieved .

过渡金属掺杂宽 禁带半导体具有半导体材料和磁性材料的双重特性，在同一种材料中可以实现对电子和自旋的调控。

Quasi-elliptic response filters are widely used in mobile and satellite communication systems for small size light weight and compact structure which are better than Chebyshev filters in transition property and extra band depression .

准椭圆滤波器体积小，重量轻，结构紧凑， 比契比雪夫滤波器有更好的 过渡特性，更高的 带 外抑制，在卫星通信和移动通信中有广泛的应用前景。

The violet emission was attributed to the electron transition from the valence band to interstitial zinc ( Zn_i ) level under the conditions of low oxygen pressure ( 50Pa ~ 500Pa ) .

在低氧气压力下（50Pa~500Pa），紫光的发射归因于电子从 价带到锌间隙原子（Zni）之间的 跃迁。

As a key technology in digital quadrature demodulation system the direct IF sampling filter with sharp cutting-off transition band can improve the performance of demodulation system .

中频采样是数字正交鉴相系统中的一项关键技术，具有 锐截止特性的中频采样 滤波器可以改善鉴相系统的性能。

The Calculation of Virtual Pitch Diameter of Sawtooth Thread 3.saw-tooth within upper transition band .

锯齿形螺纹作用中径计算（3）高端 过渡 带锯齿形。

These two filters have the advantage of compact size sharp transition band and deep stopband rejection .

仿真结果显示这两个带通滤波器都有非常紧凑的电路尺寸、陡峭的 过渡 带与高抑制度的阻带等优点。

Experimental data have shown that the value of transition band sample obtained by IA can be ensured to be optimal and the frequency characteristic of the filter is improved .

实验数据表明，采用免疫算法确定的频率 过渡 带样本值是最优的，设计的FIR滤波器的频率特性优于查表法。

GaAs is a compound semiconductor which has the best development in semiconductor materials which is used to fabricate the devices and circuits of high frequency and speed because of its high mobility ratio and direct transition energy band structure .

GaAs是发展最快的第二代化合物半导体材料，具有高迁移率、直接 跃迁 型能 带结构等优点，适合制造高频、高速器件和电路。

For the design of bandpass filter with unequal width of transition band the proposed algorithm result is better than the result of Parks-McClellan algorithm .

在设计不等宽 过渡 带的带通滤波器时，本算法优于Parks-McClellan算法的结果。

Inhomogeneous random distribution of phycobilin con formation variation results in asymmetric broadening of vibronic absorption transition band .

藻胆素构象的随机分布导致电子－振动吸收 跃迁谱 带的不对称增宽。

Via appropriate choice of wavelet parameters a wavelet cluster combined with multi-Morlet-like wavelet can be used as a band-pass filter with zero phase shift flat topped pass-band and rapid attenuation in the transition band . It can be used to extract high frequency natural vibration components .

通过合理的选择小波参数，用多个单Morlet小波组成的小波簇可构成具有零相移、平顶通带及快速衰减 过渡 带 特性的带通滤波器，用于提取振动信号的高频谐振成分。

The mid-frequency is a transition frequency band between low frequencies and high frequencies in which the structure response exhibits both low-frequency and high-frequency vibration features .

中频是从低频向高频的 过渡 频段，结构振动在此频段内兼具两个频段的振动特征。

A Probe Transition of W Band Waveguide-Microstrip Based on LTCC Technology

基于LTCC技术的W 波段波导-微带探针 过渡设计

The proposed low pass filter is based on the prototype of Chebyshev filter and with a notch added in the transition band for better frequency selectivity .

所设计的滤波器以切比雪夫滤波器为原型，在滤波器 过渡 带加入一个陷波，使得滤波器具有良好的频率选择性。

Thus the associated electron transition among the valence band the conduction band and the gap states results in the red-shift of light absorption .

因此，相关的 价带、导带和隙态的电子 跃迁导致吸收边红移。

The realized 2-D IIR filters not only keep the advantages of the linear phase charateristics in the pass band and approximately linear phase charateristics in the stop band but also compress the transition band to be steep and increase the attenuation of stop - band .

所实现的二维数字滤波器不仅保持贝塞尔滤波器通带内相位线性、阻带内相位近似线性的优点，而且能利用一维至二维的双线性变换压缩 过渡 带，使 过渡 带变得陡峭、阻带衰减增加。

In order to lower the requirement of the analog filter and enhance the performance of it cliffy transition band can be attained by adding the ranks of the FIR fliter .

同时还可以通过增加其阶数来获得较陡的 过渡 带，从而降低对前期模拟滤波器 过渡 带的要求，进一步提高滤波器的性能。

New Structure of Broad Band Coaxial-Rectangular Waveguide Transition in UHF Band

UHF宽带同轴-矩形波导 转换器新结构

By using prototype filters having a Square-Root cosine-roll-off ( SRCR ) transition band to design perfect reconstruction modulated filter banks a new method is proposed in which the prototype filter banks are designed using a second-order cone programming ( SOCP ) algorithm .

本文提出了使用 过渡 带具有平方根余弦滚降特性的原型滤波器设计完全重构滤波器组的方法，并采用二阶锥规划（SOCP）算法进行原型滤波器的求解。

Because the transition within the same conduction band ( or valence band ) between different sub-bands rely on the direction of light polarization field closely . Thus it is a main problem for this type of detector .

由于同一 导带（或价带）内不同子带间的 跃迁密切依赖于光极化场方向，因而这类探测器存在的主要问题是对垂直光入射吸收的禁戒性。

In consideration of broadband signal beams are formed at desired width by designing wedge-shaped transition band . The distance of virtual sound image is closer to listeners and listeners have the feeling of immersion .

考虑到宽带信号，引入具有楔形结构的 过渡 带，使得扬声器阵列在期望波束宽度内输出稳定波束，使得声像距离听众更近，产生强烈的沉浸感。

By comparing three design results we find the optimal design has a great deal of advantages including optimal frequency response and attenuate response smooth pass band and forbidden band and narrow transition band in the same order .

三种结果的比较发现，在同样阶数下，优化设计可以获得最佳的频率特性和衰耗特性，具有通带和阻带平坦， 过渡 带窄等优点。

Furthermore in the UV-Vis spectra the H2O2 treatment results in the formation of electronic transition band at 425 nm .

而在UV－Vis光谱中，吸附H2O2将导致一个新的电子 跃迁 带在425nm处形成。

OPtimum Design of Transition Band for the F.I.R. Filter

FIR滤波器的 过渡 带优化设计

Morlet wavelet function is introduced in designing FIR digital filter in this paper . By using the Morlet wavelet function characteristics the FIR digital filter has the properties of sharper transition band higher stopband attenuation easier to design and less computation .

本文将Morlet小波函数引入FIR窗函数设计，利用Morlet小波函数具有的特点，设计出的滤波器具有较小的 过渡 带，较大的阻带衰减，设计方法简单且计算量小等优点。

In this paper the problem of design of shaping filter with odd symmetrical transition band is discussed . An relatively general conclusion is obtained : on frequency domain the shaping filtered function is the convolution of ideal low pass filtered function and one window 's function .

讨论了具有奇对称 过渡 带的成形滤波器的设计问题，得到一个较为一般性的结论：在频域上，成形滤波函数为一个理想低通滤波函数与一个窗函数的卷积；