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fh

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fh FH, F.H.＝ fire hydrant 消防栓，消...

FH, F.H. ＝ fire hydrant 消防栓，消防龍頭，滅火龍頭。 “fh-s“ 中文翻譯：   soluble]可溶性延胡索酸水化酶; 可溶性延胡索酸水化酶“fh = reehold“ 中文翻譯：   完全保有地產“fh aachen“ 中文翻譯：   亞琛學院“fh boomerang“ 中文翻譯：   離手大“一”字“fh darmstadt“ 中文翻譯：   達姆斯塔特學院“fh esslingen“ 中文翻譯：   艾斯林根學院“fh hafnarfjordur“ 中文翻譯：   夏拿佐杜亞“fh karlsruhe“ 中文翻譯：   卡爾斯魯厄學院“fh koeln“ 中文翻譯：   但也有特例比如; 科隆學院“fh mannheim“ 中文翻譯：   曼海姆學院“fh muenchen“ 中文翻譯：   慕尼黑學院“fh muenster“ 中文翻譯：   明斯特學院“fh pforzheim“ 中文翻譯：   普弗爾茨海姆學院“fh reutlingen“ 中文翻譯：   洛于特林根學院“fh throw“ 中文翻譯：   離手大回環“fh wiesbaden“ 中文翻譯：   威斯巴登學院“fh-703g“ 中文翻譯：   法國號“fh-fyt“ 中文翻譯：   防火調節閥“hafnarfjordur fh“ 中文翻譯：   夏拿佐杜亞“familial hypercholesterolemia, fh“ 中文翻譯：   家族性高膽固醇血癥“fh file handle“ 中文翻譯：   文件句柄“fh bonn-rhein-sieg“ 中文翻譯：   波恩學院“fh fast forward“ 中文翻譯：   快進“fh firmware hub“ 中文翻譯：   固件中心“fgv“ 中文翻譯：   增長值“fgun“ 中文翻譯：   幽王拳套

fha

The fh signal is a kind of non - stationary signal that the frequency changes non - linearly along with the time . however , the time - frequency analysis technique is the powerful tool to deal with these signals 跳頻信號是一種頻率隨時間非線性變化的非平穩信號,而時-頻分析是分析這類信號的有力工具。

For meeting the military radio needs , we encrypt the fh system with stream cipher to enhance it ’ s security . it is a good way to guarantee information safety and improve the properties of fh sequences 通過利用序列密碼對跳頻系統進行加密,可尋求到具有較好密碼強度的跳頻序列和更為安全的信息傳輸。

The panel discussed the paper on the proposed conversion of fanling hospital ( fh ) into a new rehabilitation facility to provide day and residential services to people with disabilities 事務委員會討論關于下述事項的文件：建議把粉嶺醫院院舍改建為一所為殘疾人士提供日間和住宿服務的新康復設施。

This thesis includes researches on the design of communication countermeasure federation , implementations of constant frequency and fh ( frequency hopping ) communication countermeasure federations 本文的研究內容分為三個部分:通信對抗聯邦設計、定頻通信對抗聯邦實現以及跳頻通信對抗聯邦實現。

The methods of measurement for monotone and dual tone intermodulation suppression are provided as receiver works at fh mode based on intercept probability and false alarm probability are up to par 提出在滿足截獲概率和虛警概率條件下，接收機跳頻工作方式的單音和雙音互調抑制性能測試方法。

On the basis of recent researches on the ladder encoder / decoder based on fbgs , the possibility of this equipment used to ds , fe , fh and ds / fh versions of ocdma system is discussed 在有關串聯結構fbg編解碼器研究的基礎上，分析了它在ds 、 fe 、 fh以及ds fh等ocdma系統中運用的可能性。

By analyzing the spectrum feature and correlation feature of walsh sequence , we find that it has the spectrum feature of ds / fh ( direct spread / frequency hopping ) communication mode 我們分析了walsh函數序列的頻譜特性和相關特性，結果表明，該序列具有ds fh (直擴跳頻)的頻譜特性。

Therefore , based on researching fh communication systems , the influence of part time - resident interference on fh communication ' s synchronization and its tracking has been mainly analyzed 為此，在對跳頻通信系統研究基礎上，重點分析了部分駐留時間干擾對跳頻通信系統同步及跟蹤的影響。

The system completes anti - jamming function of frequency - hopping ( fh ) and direct sequence spread spectrum ( ds - ss ) by exploiting dsps + fpga structure , so it is flexible and modular 它采用dsps + fpga的結構，實現跳頻擴頻和直接序列擴頻的抗干擾功能，因而結構靈活，適于模塊化設計。

New interference methods , such as sweeping frequency interference and faster - hop - collision interference , become a new focus of electronic countermeasures to fh communication systems 摘要掃頻式干擾、更高跳速碰撞干擾等新的干擾方法成為跳頻通信系統電子對抗領域中又一重要研究方向。

So researching the surveillance , interception and classification methods for fh signals has been a difficult and pressing task in communication countermeasure fields 開展對跳頻通信對抗的研究，尋求截獲，分選識別跳頻通信信號方法，已成了當前通信對抗領域緊迫而困難的任務之一。

But fh systems are used primarily in anti - jam projection , where many users share a common bandwidth , and this may result in degrading in performance of fh system 但由于其通常運用于抗人為干擾的場合，在這種環境下，許多用戶共用相同的帶寬，系統容易受到干擾，導致性能下降。

Chaotic spread spectrum sequences , including direct sequences ( ds ) and frequency hopping ( fh ) sequences are designed utilizing chebvshev map chaotic system 采用離散混沌系統chebyshev映射設計了混沌擴頻序列，包括直擴序列和跳頻序哈爾濱工程大學博士學位論文列。

A new hybrid spread - spectrum ( ds - fh ) communication mode is discussed in detail in this paper , walsh sequence is used as frequency - hopping sequence in this mode 本文將討論一種新型的ds - fh混合擴頻通信系統。在這種系統中，使用walsh函數序列作為跳頻序列。

Then h is generated by b . ( 6 ) derfh = adh ( h + fh ) ( addi ) 3vi 1 ) , ( 7 ) let gs be the derivation algebra of lie superalgebra 5 on f and charf = 3 ( 5 )設，則h由集合b生成( 6 )其中h型模李超代數的導子代數的維數為( 7 )設g _ s是f上的李超代數s的導子代數

Further more , a preliminary solution in favor to the black ground of frequency hopping ( fh ) is suggested after an overall consideration of both performance and cost 進一步的，本文還對在跳頻體系下的ofdm應用給出了初步的系統框架。

Fh synchronization is to obtain initial synchronization , service synchronization and delayed network - joining synchronization when communication is initiated 跳頻同步解決電臺建立通信時的初始同步、勤務同步以及遲入網同步等問題。

Over the past few decades , frequency - hopping ( fh ) communication system is widely used in military applications for its well performance 跳頻通信是擴頻通信的一個分支，它的突出優點是抗干擾性強，因而很適用于軍事領域。

Synchredzation is one of the key tecboques of fh conunnication , the paper provides a synchrondation system for underwate fh coiiununication 同步技術是跳頻通信的關鍵技術，本文研究的是水聲跳頻通信中的同步問題。