查询词典 frequency bandwidth

Naturally,though,this implies that the entire model reproduction chain,of tape player,loudspeaker,microphone and recorder,must be capable of operating at very high quality with a frequency range of 400Hz to 100kHz,in order to be able to model accurately a typical bandwidth of,say,40Hz to 15kHz.

当然，正因为如此，这也暗示了整个模型的再生过程所使用的器材，从放音机，喇叭，麦克风到录音机，都要能在极高的水准下运作，其所处理的频宽为 400Hz到100kHz，以便能正确模仿一般频宽的40Hz到15kHz。

Naturally,though,this implies that the entire model reproduction chain,of tape player,loudspeaker,microphone and recorder,must be capable of operating at very high quality with a frequency range of 400Hz to 100kHz,in order to be able to model accurately a typical bandwidth of,say,40Hz to 15kHz.

当然，正因为如此，这也暗示了整个模型的再生过程所使用的器材，从放音机，喇叭，麦克风到录音机，都要能在极高的水准下运作，其所处理的频宽为400Hz到100kHz，以便能正确模彷一般频宽的40Hz到15kHz。

It features ultra-low noise import pulp Senate carbon fiber, rigid speaker cone greatly strengthened, the effective bandwidth within a more flat frequency response, the unit used aluminum frame and aluminum wire voice coil. Shaker skeleton of the United States military material, light weight, high efficiency, so that the audio sound pressure increased significantly.

超低音单元采用进口纸浆参碳纤维，纸盆刚性大大加强，在有效的频宽内有更平坦的频率回应，单元采用铝盆架和铝扁线音圈，音圈骨架为美国军事物料制造，品质轻，效率高，使音频的声压大幅度提高，更具爆发力，灵敏度极高，低音磁路采用高效率的冷却系统，保证了。

It features ultra-low noise import pulp Senate carbon fiber, rigid speaker cone greatly strengthened, the effective bandwidth within a more flat frequency response, the unit used aluminum frame and aluminum wire voice coil. Shaker skeleton of the United States military material, light weight, high efficiency, so that the audio sound pressure increased significantly.

超低音單元採用進口紙漿參碳纖維，紙盆剛性大大加強，在有效的頻寬內有更平坦的頻率回應，單元採用鋁盆架和鋁扁線音圈，音圈骨架為美國軍事物料製造，品質輕，效率高，使音頻的聲壓大幅度提高，更具爆發力，靈敏度極高，低音磁路採用高效率的冷卻系統，保證了。

In this paper, based on a pill-box window model with a conical-shaped alumina ceramic and Ansoft HFSS software, the relation of VSWR with various electrical parameters in the window is simulated; the effects of variations of the output window structure on electrical field intensity, microwave power flow and quantity of heat are analyzed; the electrical characteristics of frequency bandwidth, power capability and heat dissipation for the pill-box window with conical-shaped or disk alumina ceramic are discussed, which shows that, with a rational structure of the window with conical-shaped alumina ceramic, the output capability of microwave peak and average power may greatly be increased, the secondary electron emission may effectively be suppressed, and heat dissipation may become more uniform and be easier for cooling.

本文在前人工作的基础上，基于圆锥形陶瓷盒形输出窗模型，采用Ansoft HFSS三维计算软件的优化模拟，对该输出窗模型的驻波频率特性与各种结构参量的关系进行了优化模拟，分析了该输出窗片结构变化对其表面的电场分布，功率流分布、热量分布的影响，得出最优模型参数。并且探讨了陶瓷窗片的形状和几何结构对改善输出窗的频带特性、提高峰值功率和平均功率、抑制二次电子倍增方面的作用。

The designed central frequency of the filter is 2017.5MHz and the fractional bandwidth is 0.297%.The filter was fabricated with double-coated DyBa2Cu3O7 film on MgO wafer.

该滤波器的中心频率为2017.5MHz，相对带宽为0.297%，由MgO衬底上的双面DyBa2Cu3O7超导薄膜加工而成。

Recent progress in radio prototype has extended the horizons of radio technology by liberating chronics dependence on hard-wired characteristics including frequency band, channel bandwidth, and channel coding. These efforts have led us to the feasibility of dynamically programmable receivers system of software radio.

软件无线电系统的硬件结构与功能相对独立，这样就可以基于相对通用的硬件平台，通过软件实现不同的通信功能，并可对工作频率、系统频带、调制方式等进行编程控制，系统的灵活性大大增加。

There are three parts included. The first part is the prepositive-amplifier, it gets broadband high gain and flat frequency response. The second part is the U band quadrupler, which composed of two doublers using a PHEMT chip HMMC-5040, a Schottky diode of DMK-2790, a HMMC-5040 amplifier, and a fin-line transitional stage. Maximum output power higher than 60mW is obtained in V band. The third part is a 2nd harmonic gunn oscillator injection locked by the Fundamental Wave,which get about 2GHz locked bandwidth in W band.

电路主要由三部分组成，第一部分为采用HMMC-5618设计的前置放大器，实现了宽带高增益和平坦的频率响应；第二部分为设计的主体，由HMMC-5040设计的二倍频器、DMK-2790设计的二倍频器、HMMC-5040设计的放大器及鳍线过渡段组成的U波段四倍频器，在U波段实现了最高60mW以上的输出功率；第三部分为基波注入锁定谐波Gunn振荡器，在W波段实现了近2GHz锁定带宽。

Components that exhibit significant loss over a bandwidth of over 100 MHz, ferrites can be characterized as high frequency

电感及电容所组成的电磁波干扰滤波器，有可能会使电路感应而形成共振，造成额外有电磁波干扰问题的频带。

Firstly two characteristic points of the open-loop frequency are identified based on relay feedback experiments: the ultimate point and the bandwidth point.

通过继电反馈辨识系统开环带宽度点和临界点，利用带宽点的信息建立一阶加纯延迟模型。

In the chapter 2, the theoretic knowledge about the photosensitive resin and the grinding tools was firstly introduced.

第二章阐述了光固化树脂结合剂磨具的相关理论研究。

Do not use the program's indenting or margin-setting features; these will be added during typesetting.

不要使用缩排，页面边缘设置之类的选项，偶看不大懂。