[物] 中頻
The pure quartz lump becomes quartz tube via untouched technology of intermediate frequency induction heating.
采用中頻感應加熱無接觸技術，将石英淨坨拉制成為石英管。
Computerized Intermediate Frequency Therapy Apparatus is one of the most useful electrotherapy units in clinical.
電腦中頻治療儀是一種在臨床被廣泛應用的電子康複治療設備。
While the Digital Intermediate Frequency technology is one of the pivotal technology in the wireless base station system.
而數字中頻技術是無線基站傳輸系統中的關鍵技術之一。
Objective To observe the clinical effect of acupunture and computer intermediate frequency for fibromyalgia syndrome (FS).
目的觀察針刺加電腦中頻治療纖維肌痛綜合征的臨床療效。
The non-ideal characteristic of intermediate frequency signal is unfavorable for band-pass sampling and affects the performance of quadrature transform.
信號中頻的非理想給帶通采樣有着不利影響，并影響正交變換的性能。
And the application in intermediate frequency digital receiver proves this software system′s efficiency and dependability.
在中頻數字接收系統中的應用驗證了此軟件系統的效率和可靠性。
The paper introduces some experience in anti-interference for design and parallel operation of small intermediate frequency three-phase synchronous generator with active load.
本文介紹了帶有源負載時，小型三相同步中頻發電機的設計和并聯運行時抗幹擾方面的一些經驗。
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：可廣泛應用于中頻通訊系統中，提高信號的選擇性和抗幹擾能力。
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有限元分析軟件，采用三維非線性有限元方法對柴油機曲軸中頻淬火瞬态溫度場進行了模拟計算；
The example by quenching to intermediate frequency is analysed, advantage having ascertained mill roller intermediate frequency quenching.
通過對中頻淬火的實例分析，确定了軋鋼機軋輥中頻淬火的優勢。
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.
針對專用移動移動通信對接收機的要求，分析了TETRA協議中基站接收機技術指标和選擇雙中頻超外差接收機方案。
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.
需要實現的跳頻解跳與數字中頻接收機既能對跳頻信號進行實時解跳，又能做為一台軟件無線電接收機使用。
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.
該系統的關鍵部件是一個數字中頻接收機，利用DSP和FPGA實時獲取幅度和相位數據，從而提高了測量速度和靈活性。
The common breakdown and its removal of the rectifier circuits and inverse transforming circuits in intermediate frequency induction electric furnace for thyristor are introduced.
介紹了在可控矽中頻感應電爐中整流電路和逆變電路的常見故障及其排除方法。
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通用信號處理闆主要目的是構造ICNIA系統中中頻及基帶信號的通用化數字處理平台，并完成與主控計算機之間的通信接口功能。
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.
而鏡頻抑制混頻器能夠在寬帶、低中頻的情況下實現良好的鏡頻抑制。
A feasible digital intermediate frequency receiver based on software radio technology is presented in this paper.
基于軟件無線電思想介紹了一種可行的中頻數字化接收機系統設計方案。
This scheme can also adapt DS/DMPSK modulation and demodulation with different base data rate, different pseudo random codes and different intermediate frequency.
該方案可以適應不同基帶數據速率、不同僞隨機碼和不同中頻的DS/DMPSK的調制和解調。
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.
最終以通過檢測的跳頻解跳與數字中頻接收機的實物作為碩士期間的研究成果呈現。
GPS digitized intermediate frequency signal sampler was used to validate the algorithm of acquisition and tracking of software receiver.
采用GPS中頻信號采樣器采集實際GPS數據，對搜索和跟蹤算法進行了驗證。
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.
為使系統的功率因數較高，采用電壓源型負載串聯諧振中頻逆變器和頻率跟蹤技術。
An adaptive stochastic resonance algorithm is proposed and used in detecting the fault signal of intermediate frequency power source. The result is preferable.
提出了一種隨機共振自適應算法，并運用于中頻電源的故障信號檢測，取得了較好結果。
Adopt chain ty pe transmission, can equip 25KW-160KW intermediate frequency power, for heating the head of the long length rod.
采用鍊條式送料傳動機構，可配置25KW-160KW中頻電源，適應長棒料端部加熱。
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.
對基于軟件無線電的數字中頻接收系統進行了讨論，對基于FPGA的數字下變頻模塊進行了優化設計，并給出了具體設計方案。
|mean frequency;[物]中頻
在電子工程領域，Intermediate Frequency (IF) 中文譯為中頻，指在超外差接收機（Superheterodyne Receiver）架構中，将接收到的高頻射頻信號通過變頻過程轉換成的固定較低頻率信號。這個頻率介于原始射頻（RF）和高保真音頻或基帶信號之間，故稱“中頻”。
其核心原理和功能如下：
變頻目的與過程：
中頻的核心優勢：
典型應用與數值：
中頻（Intermediate Frequency）是超外差接收技術的關鍵概念，指通過變頻過程将可變的高頻射頻信號轉換為一個固定的、較低頻率的信號。這一轉換的核心目的是利用在固定頻率上更容易實現高增益、高選擇性濾波和穩定放大的優勢，從而顯著提升接收機的靈敏度、選擇性和整體性能。該技術自發明以來一直是無線電接收領域的基石之一，并在現代通信和電子系統中持續發揮着重要作用。
參考資料來源：
“Intermediate frequency”（簡稱IF）是通信和電子工程領域的專業術語，根據上下文不同，其含義可分為以下兩類：
指300 kHz至3000 kHz的頻率範圍，常用于調幅（AM）廣播。其特點是：
指高頻信號經過變頻處理後生成的固定頻率信號，主要應用于無線電接收機、雷達等設備。其核心作用包括：
該術語在不同場景下的具體含義需結合上下文判斷，但在電子工程中主要指第二種定義。
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