Especially, regularity as one of the constraints assure the flatness in passband and the high attenuation in stopband, even the value of stopband response is very close to zero.
尤其是本文把正则阶作为约束条件之一,从而保证了滤波器通带的平坦性和阻带的快速衰减,并且在阻带滤波器的频谱值非常接近于零。
The results of experiments show that there are obvious linearity relationship between the attenuation of ultrasonic and the concentration of high water based fluid in some ranges.
实验结果表明:超声波在高水基流体介质中的衰减与一定范围的介质浓度存在较好的线性关系。
Some papers indicate that using high attenuation rate neutral filter can expand the measuring range of CCD.
多篇文献提出在CCD前加高衰减率的中性滤光片来扩大测温范围。
Objective the variations of the site and shape of focal region for a concave spherical ultrasound transducer in the case of high sound intensity and stronger attenuation were studied.
目的研究凹球面超声换能器的声焦域在高声强和媒质有较大衰减情况下,其形状和几何位置的变化。
The linchpin of undertaking high temperature ultrasonic testing is the control of the coupling, attenuation and route of the sound.
在高温状态下,超声波探伤实施的关键在于声耦合、声衰减和声路径的控制。
Ct usually demonstrates a high attenuation region surrounded by a halo of abnormally low attenuation, consistent with acute hemorrhage and secondary edema, respectively.
CT上经常显示一个高信号衰减区外周围绕一圈低信号衰减光晕,这种影像与相应的出血和继发性水肿是相一致的。
These high frequencies and the accompanying formation attenuation severely limit the range of investigation.
高频率和随之而来的地层衰减严重制约了测量范围。
But whether it can reach the prospecting aim by study for inversion of attenuation by earth absorption and by decreasing high frequency noise?
但是否可以通过研究反演大地吸收衰减和减少采集的高频噪声达到勘探的目的呢?
Air-fluid level in the left maxillary sinus (red arrow) containing high attenuation is consistent with hematoma.
左侧上颌窦气液平面(红箭)密度较高,符合出血。
On the other hand, the attenuation of high temperature fiber used for temperature sensor is still too high for communication purpose.
主要用于传感的耐高温光纤的衰减太大,也不能用于通信。
When frequency is comparatively high, circular tunnel, rectangular tunnel and arched tunnel have same formulation of attenuation rate.
当频率较高时,圆形隧道、矩形隧道和拱形隧道的衰减率表达式是一致的;
The cylinder in invention is provided with large initial rigidity, high load capacity, slow attenuation of load capacity and rigidity, good total aseismic consumed energy behavior.
本发明的筒体比现有筒体的初始刚度大、承载能力高、承载力和刚度衰减慢、整体抗震耗能性能好。
Mainly by High Power is white, warm white, red, yellow, blue, green series products, the stability, the attenuation extent, consistency, color rendering all have excellent performance.
主要以HighPower正白、暖白、红、黄、蓝、绿系列产品,其稳定性、衰减幅度、一致性、显色性均具有出色的性能。
The product is a new energy-saving lighting source, with the performance of high brightness, low attenuation, long lifetime and high reliability.
本产品是一种新型高功率节能光源,它具有亮度高、衰减小、寿命长、可靠性高等优点。
With the features of super brightness, low attenuation, high reliability, good consistency, and high weather ability.
超高亮、低衰减、高可靠性、一致性好、高耐候性;
Results: High quality VR-3D images will be obtained by selecting 2 or 3 objects, appropriate range of attenuation value and opacity %.
结果:选择2或3个目标、合适的衰减值及不透明度的限值可获得良好的VR立体成像。
Attenuation of wave amplitude of reservoir rock at simulated high temperature and pressure is measured with spectrum-amplitude comparison mediod in laboratory.
在实验室内用频谱振幅比较法模拟测试了储集层岩石在高温高压下的弹性波振幅衰减值。
The karst multi-media structure is high heterogeneity, and the outflow process is simulated by using laboratory experiment, especially the discharge attenuation process is deeply analyzed.
本文借助室内实验装置,模拟了结构不均匀的岩溶多重介质的出流过程,并着重对流量衰减过程进行了分析。
The optical fiber communication technique is well suited to a large delay time, due to the low attenuation and chromatic dispersion of the fiber, and to its high bandwidth.
通信技术中使用的光纤,由于其低耗与宽带特性,能较好地满足这种要求。
It is characterized by good frequency selectivity, low insertion loss and high attenuation of specified frequency.
它具有频率选择性好,通带插损低,对陷波频点抑制较高的优点。
The transmission zeros(TZ) of Quasi-elliptic function filter could be placed in any position, so the attenuation out of band is controllable, then a high selection performance could get.
准椭圆函数滤波器的传输零点,可以位于阻带内的任意位置处,这能更加灵活地对滤波器的带外抑制度进行调节,其矩形系数可以做得很高。
Small solid solder joint, electrical conductivity, and no signal attenuation, when subjected to high temperature and low temperature will not fall off.
焊点细小牢靠、导电性好、无讯号衰减,在经受高温和低温时不会脱落。
The serial product features include wide frequency band, low VSWR, high attenuation accuracy, small dimensions, high power, excellent capacity in anti-burnout etc.
该系列产品具有频率范围宽、驻波系数低、衰减精度高、体积小、功率大、抗烧毁性能好等特点。
The bandpass filter that has spurious suppression characteristics can solve this problem and it has excellent bandpass symmetry and stopband attenuation characteristics at high frequency.
具有杂波抑制特性的带通滤波器不仅可以实现这个功能,同时由于抑制了杂波还可以提高带通滤波器的通带对称性以及高端阻带的衰减特性。
The utility model has simple operation, system sealing ring controlling, high reliability and high attenuation preciseness.
本实用新型操作简易,系统闭环控制,可靠性高,衰减精度高。
Narrow channel band, severe multipath interferences and severe channel attenuation have demonstrated the great complexities and difficulties of high-speed UWA communications.
信道通带窄、多途干扰强、衰落严重是水声通信高速可靠传输信息的主要障碍。
It has a rather high transmission frequency and low attenuation.
居有较高的传输频率和较低的衰减。
The design of reliable high speed communication systems for power line communication (PLC) requires an accurate knowledge of such channel specific characteristics as attenuation, impedance and noise.
为了设计基于电力线通信( PLC)的高速可靠通信系统,必须了解衰耗、阻抗、噪声等电力线信道特性。
High brightness, low attenuation, low energy consumption, long service life.
高亮度,光衰低,能耗低,寿命长。
In this paper, I present three studies on high-frequency seismic attenuation and propose that the physical mechanism results from the interference of elastic microscopic multiple scattering waves.
通常认为地震波高频衰减的物理机制主要是滞弹性的吸收,本文通过如下三方面的研究认为地震波高频衰减的物理机制主要是弹性的微观多次散射波的相互干涉。
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