中频

Melting by 5 T / hot air at the cupola and 750 KG / N IF the electric furnace, the high temperature will be above 1500 ℃ hot metal, machine-wave modeling in addition to modeling, advanced Fumo sand and shell technology, equipped with a polishing equipment and the entire fire, Polished, finishing processes, can provide users with fine casting.

熔炼采用5T/时热风冲天炉和750KG/N的中频电炉，可获得1500℃以上高温铁水，造型除潮模机器造型外有先进的复膜砂和壳型工艺，配备有抛光设备及整火、磨光、精整工艺，可为用户提供精美的铸件。

The company is under the jurisdiction of 843 state-run factories of Industry Corporation of weapons (the Qin chuan of the North of Xi'an now ), have cooperated with unit experts and technical staff such as Zhejiang University , Tsing-Hua University , Xi'an Communications University ,etc. for many years, in absorb , digest Company and AG reaction of Company , BBC of Germany , heat power at the technological foundation, develop , help integrated circuit control and digital control circuit brilliant floodgate in charge of the power of intermediate frequency, apply various smelting , being completely hot , quenching metal to , return bend and reaction heat field of brazing, make reaction heating technology of our company in in a leading position competence at home.

公司隶属于兵器工业总公司国营843厂（现为西安北方秦川有限公司），多年来同浙江大学、清华大学、西安交通大学等单位的专家及技术人员合作，在吸收消化德国BBC公司与AG公司的感应加热电源技术基础上，研制成全集成电路控制及数字控制线路晶闸管中频电源，应用于各种金属的熔炼、透热、淬火、弯管及感应加热钎焊领域，使我公司的感应加热技术在国内处于领先水平。

And the GPS IF signal generator platform has been designed by using Nemerix\'s GPS RF chip NJ1006A.

并利用Nemerix公司的GPS射频芯片NJ1006A设计制作了GPS中频信号产生平台。

Secondly, we discuss the application of IF sampling and digital demodulation technique in PD weather radar signal processing system.

其次，本文研究了中频采样及数字解调技术在气象雷达中的应用。

In this thesis, a digital-IF Doppler radar system is designed.

本文设计了具有数字中频结构的多普勒雷达系统。

The bandpass sampling theory and variable speed digital signal processing were described in detail.

本文首先讨论了多频多模接收模块的实现方案，对比了几种方案，论证了数字中频方案的可行性。

At first,the performance of different discriminators in code and carrier loop are compared based on anlyzing the principle of GPS tracking.Then the tracking effects with different loop patameters are simulated and compared.At last,a couple of discriminators are selected and proper loop parameters are designed to track actual GPS intermediate frequency signal,and the tracking results validate the design.

在分析GPS跟踪原理的基础上，对比码环与载波环不同鉴相器的性能，然后在不同环路参数下对跟踪效果进行了仿真比较，最后选择一组鉴相器并设计合适的环路参数，对实际采集的GPS中频信号进行跟踪，跟踪结果验证了设计环路的有效性。

Bispectral analysis and dynamic spectral analysis are applied to the wind data of June, 1997, measured by MF radar in Yamagawa, Japan, to investigate nonlinear interactions among planetary waves, tidal waves and gravity waves in the mesopause region.

对中纬度中频雷达1997年6月82km高度的小时平均风场数据进行了动态谱分析和双谱分析，得到了中层顶区域谱行为具有多样性和各向异性的特点，以及行星波、潮汐波和重力波之间相位相干的现象，讨论了中层顶行星波、潮汐波和重力波之间存在非线性相互作用的可能性。

So it can achieve more accurate representation of the medium and high frequency information of SAR images.

基于小波变换的压缩方法往往视信号的高、中频部分为不重要信息，造成细节失真。

Based on medium frequency and high power inverter, one digital control system of multi-cell-cascaded inverter power supply is studied in detail in this paper.

本文针对中频大功率逆变电源，对多单元串联逆变电源的数字化控制系统进行了研究。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。