[物] 中频
The pure quartz lump becomes quartz tube via untouched technology of intermediate frequency induction heating.
采用中频感应加热无接触技术，将石英净坨拉制成为石英管。
Computerized Intermediate Frequency Therapy Apparatus is one of the most useful electrotherapy units in clinical.
电脑中频治疗仪是一种在临床被广泛应用的电子康复治疗设备。
While the Digital Intermediate Frequency technology is one of the pivotal technology in the wireless base station system.
而数字中频技术是无线基站传输系统中的关键技术之一。
Objective To observe the clinical effect of acupunture and computer intermediate frequency for fibromyalgia syndrome (FS).
目的观察针刺加电脑中频治疗纤维肌痛综合征的临床疗效。
The non-ideal characteristic of intermediate frequency signal is unfavorable for band-pass sampling and affects the performance of quadrature transform.
信号中频的非理想给带通采样有着不利影响，并影响正交变换的性能。
And the application in intermediate frequency digital receiver proves this software system′s efficiency and dependability.
在中频数字接收系统中的应用验证了此软件系统的效率和可靠性。
The paper introduces some experience in anti-interference for design and parallel operation of small intermediate frequency three-phase synchronous generator with active load.
本文介绍了带有源负载时，小型三相同步中频发电机的设计和并联运行时抗干扰方面的一些经验。
Application : This series can be widely used in the communication systems of Intermediate Frequency for improving selectivity and anti-jamming capacity of signals.
用途：可广泛应用于中频通讯系统中，提高信号的选择性和抗干扰能力。
The three dimensional non linear finite element analysis of the transient temperature field during intermediate frequency quenching of ***sel crankshaft was simulated by using of ANSYS.
利用ANSYS有限元分析软件，采用三维非线性有限元方法对柴油机曲轴中频淬火瞬态温度场进行了模拟计算；
The example by quenching to intermediate frequency is analysed, advantage having ascertained mill roller intermediate frequency quenching.
通过对中频淬火的实例分析，确定了轧钢机轧辊中频淬火的优势。
Aiming at request of private mobile radio, technology requirement of base station receiver based on TETRA protocol is analyzed, and two intermediate frequency superheterodyne structure is selected.
针对专用移动移动通信对接收机的要求，分析了TETRA协议中基站接收机技术指标和选择双中频超外差接收机方案。
The de-hopping and digital intermediate frequency receiver can either do the real-time de-hopping processing or be used as a software radio receiver.
需要实现的跳频解跳与数字中频接收机既能对跳频信号进行实时解跳，又能做为一台软件无线电接收机使用。
The key component of the system is a digital intermediate frequency receiver employing DSP and FPGA to obtain amplitude and phase data in real-time, which improves measurement speed and flexibility.
该系统的关键部件是一个数字中频接收机，利用DSP和FPGA实时获取幅度和相位数据，从而提高了测量速度和灵活性。
The common breakdown and its removal of the rectifier circuits and inverse transforming circuits in intermediate frequency induction electric furnace for thyristor are introduced.
介绍了在可控硅中频感应电炉中整流电路和逆变电路的常见故障及其排除方法。
ICNIA general signal processor mostly is the same with general digital process of intermediate frequency and baseband signal in ICNIA system, and has interface function with major control computer.
ICNIA通用信号处理板主要目的是构造ICNIA系统中中频及基带信号的通用化数字处理平台，并完成与主控计算机之间的通信接口功能。
Having the property of good image rejection in broadband and low intermediate frequency (IF) cases, the image-rejected mixers (IRM) have been widely used in various MMW receivers.
而镜频抑制混频器能够在宽带、低中频的情况下实现良好的镜频抑制。
A feasible digital intermediate frequency receiver based on software radio technology is presented in this paper.
基于软件无线电思想介绍了一种可行的中频数字化接收机系统设计方案。
This scheme can also adapt DS/DMPSK modulation and demodulation with different base data rate, different pseudo random codes and different intermediate frequency.
该方案可以适应不同基带数据速率、不同伪随机码和不同中频的DS/DMPSK的调制和解调。
Finally the fruit of research for my master degree presents in the way of actual de-hopping and digital intermediate frequency receivers that have passed the examination.
最终以通过检测的跳频解跳与数字中频接收机的实物作为硕士期间的研究成果呈现。
GPS digitized intermediate frequency signal sampler was used to validate the algorithm of acquisition and tracking of software receiver.
采用GPS中频信号采样器采集实际GPS数据，对搜索和跟踪算法进行了验证。
In order to improve the power parameter further, the intermediate frequency inversion of an electric voltage power type series resonance and frequency trace technique are adopted.
为使系统的功率因数较高，采用电压源型负载串联谐振中频逆变器和频率跟踪技术。
An adaptive stochastic resonance algorithm is proposed and used in detecting the fault signal of intermediate frequency power source. The result is preferable.
提出了一种随机共振自适应算法，并运用于中频电源的故障信号检测，取得了较好结果。
Adopt chain ty pe transmission, can equip 25KW-160KW intermediate frequency power, for heating the head of the long length rod.
采用链条式送料传动机构，可配置25KW-160KW中频电源，适应长棒料端部加热。
In this paper, some techniques in digital intermediate frequency receiving system were introduced. The DDC based on FPGA is stu***d, and one specific design is given too.
对基于软件无线电的数字中频接收系统进行了讨论，对基于FPGA的数字下变频模块进行了优化设计，并给出了具体设计方案。
|mean frequency;[物]中频
在电子工程领域，Intermediate Frequency (IF) 中文译为中频，指在超外差接收机（Superheterodyne Receiver）架构中，将接收到的高频射频信号通过变频过程转换成的固定较低频率信号。这个频率介于原始射频（RF）和高保真音频或基带信号之间，故称“中频”。
其核心原理和功能如下：
变频目的与过程：
中频的核心优势：
典型应用与数值：
中频（Intermediate Frequency）是超外差接收技术的关键概念，指通过变频过程将可变的高频射频信号转换为一个固定的、较低频率的信号。这一转换的核心目的是利用在固定频率上更容易实现高增益、高选择性滤波和稳定放大的优势，从而显著提升接收机的灵敏度、选择性和整体性能。该技术自发明以来一直是无线电接收领域的基石之一，并在现代通信和电子系统中持续发挥着重要作用。
参考资料来源：
“Intermediate frequency”（简称IF）是通信和电子工程领域的专业术语，根据上下文不同，其含义可分为以下两类：
指300 kHz至3000 kHz的频率范围，常用于调幅（AM）广播。其特点是：
指高频信号经过变频处理后生成的固定频率信号，主要应用于无线电接收机、雷达等设备。其核心作用包括：
该术语在不同场景下的具体含义需结合上下文判断，但在电子工程中主要指第二种定义。
hisgunby chancerepentancegigglelayoffsqueamishoverreachanonbusinesslikedreamilyleasinglinkenpterosaurspinalisYemenattrition rateoutermost layerpot of goldanthranilantitradesanywaysautopolyploidbacklockingbalancergranulopeniahydrofluorinatorinterdendriticlanosteneWSN