長通濾波器 的英文怎麼說
中文拼音 [zhǎngtōnglǜbōqì]
長通濾波器
英文
long pass filter- 長 : 長Ⅰ形容詞1 (年紀較大) older; elder; senior 2 (排行最大) eldest; oldest Ⅱ名詞(領導人) chief;...
- 通 : 通量詞(用於動作)
- 濾 : 動詞(除去液體雜質) filter; strain
- 波 : Ⅰ名詞1 (波浪) wave 2 [物理學] (振動傳播的過程) wave 3 (意外變化) an unexpected turn of even...
- 器 : 名詞1. (器具) implement; utensil; ware 2. (器官) organ 3. (度量; 才能) capacity; talent 4. (姓氏) a surname
- 濾波器 : [電子學] electric filter; (electric) wave filter; filter
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The basic concept of siw is that it use the top and bottom layers of metal together with two row of vias is very small compared with wavelength, the dissipation loss of radiation is very small. it acts like a rectangular waveguide filled with some dielectrics, so components which can be composed by rectangular waveguide can also composed by siw such as antenna, filter, power divider, coupler, resonator
基片集成波導的基本概念是利用基片的上下金屬板和兩排間隔一定距離的金屬孔構成波導的金屬壁,由於每排金屬孔孔間距遠小於波長,因此由縫隙泄漏的能量很小,這相當于內部填充了介質的矩形波導,所以能夠用矩形普通波導實現的結構也都可以用基片集成波導來實現,比如功分器、濾波器、天線、耦合器、振蕩器等。Upon its establishment tera xtal managed to recruit the top technical personnel in crystal growth and wafer processing fields. their first mission was to manufacture the lithium tantalate crystal substrate for the rf saw filters used in the wireless applications
凝聚國內長晶及晶圓加工等技術第一流菁英共同組成的經營團隊投入創業,半年來最主要的課題就是在最短的時間內生產出無線通訊器材內射頻表面聲波濾波器The stability output second harmonic generation ( shg ) experiment results of single - longitudinal mode and multi - longitudinal mode with long cavity were explained reasonably with these rate equations. the high polarization of fundamental wave in the isotropic laser media nd : yag with type - i critical phase - matching lbo was studied with the rate equations including polarization of fundamental light. using the polarization function of lbo, a quartz full - wave plate was introduced into the cavity, a kind of birefringent filter by considering the combination of the polarization function of the type - i critical phase - matching doubling frequency crystal lbo and the quartz whole - wave plate was constructed
將腔內多縱模倍頻速率方程推廣應用到準三能級藍光激光器中,分析了一個縱模、兩個縱模、多個縱模時的噪聲情況,合理地解釋了實驗中激光器單縱模運轉以及長腔多縱模運轉時穩定輸出的實驗現象,同時利用該速率方程分析了以各向同性激光晶體nd : yag為工作物質,類臨界相位匹配lbo為倍頻晶體的藍光激光器中基頻光偏振特性,合理利用類臨界相位匹配lbo倍頻晶體的偏振特性與引入的石英晶體全波片構成雙折射濾光片,通過選單頻來抑制噪聲,獲得了藍光低噪聲的穩定輸出。The increasing of single channel capacities and evolution of optical networks topology, from simple point - to - point to intelligent optical networks, call for strict demands to optical filters. in this paper, the crucial technologies of optical filters such as interleaver, optical digital filter, fused biconical taper all - wave coupler as well as polarization - pump combiner have been studied experimentally and theoretically, which include : 1. a new process, cascaded fbt ( fused biconical taper ) with precise control as well as strict interference arm length difference, is proposed for the first time to our knowledge
單通道速率不斷提高以及網路拓撲由單一的點對點傳輸向可上下載的環網和可動態選擇波長路由的智能型格形光網路演進,對光濾波器的常規性能指標、時域特性和動態可調諧特性提出了更加苛刻的要求,鑒於此,本論文全面研究了全光纖熔錐型奇偶交錯濾波技術、數字光濾波技術、基於g - t全通濾波器的奇偶交錯濾波技術以及熔錐型全波耦合器和偏振泵浦合波器。In this thesis, first, we present the theory of sess system, the generation of the sess spreading code and its characteristics and the acquisition theory of conventional spread spectrum communication system. an efficient acquisition scheme based on periodically transmitting the synchronization head, which is composed of binary chaotic codes, using the matched filter and automatic decision threshold - level control based on a so - called constant false alarm criterion for sess system is present. the acquisition model of sess system is built and simulated in the awgn channel, the raleigh fading channel and imulti - address interfere condition
本文首先概述了自編碼擴頻通信的原理、自編碼擴頻序列的產生方法及其特性和擴頻通信系統編碼同步的理論,然後針對自編碼擴頻通信系統提出了擴頻序列捕獲方案:周期性地加入混沌序列同步碼,並採用恆虛警率匹配濾波器捕獲法;在加性白高斯噪聲通道、瑞利衰落通道和多址干擾情況下進行了模擬,分析了各種捕獲性能:在選擇性能最優的混沌序列、適當的序列長度、虛警概率及門限值的情況下,可以獲得較短的捕獲時間和較大的捕獲概率。In the hardware implementation of a multi - channel active noise control system, the computational complexity is increased sharply when the number of filter coefficients and channels are increased
摘要在多通道有源噪聲控制系統的硬體實現中,當通道數目增大或濾波器長度較長時,常規的多通道演算法運算量急劇增加,使控制器可能無法實時實現。Secondly, ground on the duct noise control, the delayed - lms algorithm, which is actulized easily, is brought forward, then the simulation on pc is achieved. it is shown from the computer simulation that for the single frequency noise, there will be a good effect when choosing the suitable parameters ; but for the narrowband noise, the effect will become worse with increasement of the bandwidth. this result is helpful to analyze the parameters influencing anc
結果表明: ( 1 )隨著濾波器長度的增大,系統收斂速度變快; ( 2 )隨著值的增大,系統的收斂速度增大,但是當值超過某一范圍時會引起系統的發散; ( 3 )次級通路的延遲數與初級噪聲頻率有關; ( 4 )對于窄帶信號, dlms演算法可以取得一定的降噪量,但是隨著窄帶信號帶寬的增大,降噪效果明顯變差。At this time, the approximate mechanical model of devices has been put forward, which frequency is 70 mhz, then we analyzed the euler ? bernoulli equation, find that the frequency is determined by the resonator ’ s density thickness and length ; the free - free - beam 、 coupled beam 、 support beam 、 transducer have been designed ; the model was simulated and modal analyzed on the coventorware and were consistent with the designed parameter. the silicon surface microfabrication process was developed and emphatically introduced several key surface microfabrication technologies, and was simulated by coventorware
本文通過分析歐拉-貝努立方程,得出濾波器的共振頻率主要由諧振梁的密度、厚度和長度決定,考慮切變形和轉動慣量的情況下,完成微機械諧振梁、支撐梁、驅動電容的設計;在coventorware軟體上進行模擬,分析結果與理論設計比較好地吻合;對微機械濾波器的加工工藝進行設計,給出器件的完整的工藝流程,重點介紹微機械表面加工工藝,並在coventorware上進行模擬。The inductor, which is one of the most important magnetic components, is not only used in lc filter and choke but also in rf communication circuit. the thin film inductor can be integrated with semiconductor components, so far it has not been widely used in these fields, the reason is the limited of thin - film material and substrate, process technology and design technology. designing and fabricating thin film inductor is the key point of this paper
而作為磁性元器件中最重要的電感,它不僅在lc濾波電路、扼流圈中必不可少,在現代射頻通信電路中也被廣泛使用,特別是能與硅器件一起集成的薄膜電感器,在國際上備受重視,而國內長期以來,由於受薄膜磁芯材料、繞組材料、基片材料,包括製作技術及最為關鍵的設計技術限制,尚未研發出能夠用於這一應用領域的高、中、低頻薄膜電感器。By setting a amplitude filter ( module ) with certain transmission function in arrayed waveguides, we design optic signal add / minus. by changing the length of center arrayed waveguides, we design phase foil filter of awg ultimately, the present stage work are summarized and some future work are discussed
通過在陣列波導嵌入一定傳遞函數的振幅型濾波片(模片) ,設計了awg型光信號加減器;通過改變中心陣列波導的長度,設計了awg型相襯濾波器。By analyzing the refraction 、 reflection process of fault transient current traveling wave of high voltage and characteristics of refraction 、 reflection coefficient systematically, a new fault location method of single ended traveling wave is presented. it can not only identify the reflection wave for fault location efficiently, but also not be affected by the structure and length of line. fault earthed resistance 、 fault type 、 system impedance and can locate fault in adjacent areas accurately
論文深入地分析了高壓線路故障暫態電流行波的波折、反射過程以及折、反射系數的特點,提出了新的單端行波故障測距方法,它不僅能夠有效地識別出測距所用的反射波,而且幾乎不受線路結構、長短、故障接地電阻、故障類型、系統阻抗的影響,在近區仍可以準確地進行測距;同時模擬阻波器的特徵,設計了低通數字濾波器,對通過了低通數字濾波器的暫態故障電流行波再次進行小波分析,並利用本文提出的單端行波故障測距方法進行故障定位,結論是所提出的測距方法在實際應用中仍是有效的。Cooperation with the universities and colleges widely, such as sichuan university, zhejiang university, zhejiang university of technology, etc. established long design research item. mainly products are : tv - if saw filters for color tv sets and b / w tv sets, cordless phone saw filters, saw resonator and all kinds of low insertion saw components in the communication
公司與四川大學、浙江大學、浙江工業大學等大專院校建立長期的科研合作關系,主要設計開發的產品有:電視中頻聲表面波濾波器、無繩電話聲表面波雙工器、廣泛應用於通信領域的聲表面波諧振器和各類低插損聲表面波帶通濾波器。In this paper, the partial - update algorithm used in the multi - channel active noise control system is investigated, and a variety of factors influencing the hardware implementation are discussed
研究了局部迭代演算法在多通道有源控制系統中的應用,討論了系統選取不同通道數和濾波器長度時,對演算法硬體實現的影響。From introducing its function in wavelenght division multiplexing and theory, this paper fetch out researchful intention and significance about long - wavelength pass filter. in this paper, it expatiates film theory and microcosmic process of film growing
本文通過簡單地介紹長波通濾光片在波分復用器( wdm )中的作用及工作原理,引出了長波通濾光膜的研究目的和意義。Ideas about applications of lpfg to band - pass filters, optical add / drop multiplexing, optical fiber sources, coupling of fibers, optical fiber polarizers and novel sensing are illustrated
闡明了長周期光纖光柵用於帶通濾波、光上下路復用、光纖光源、光纖耦合、偏振器件、新型傳感等新技術領域的思路,給出了具體實現方法。Based on the structure of all optical active fiber ring resonator, dual - tunable er3 + - doped optical fiber ring resonator filter is investigated by adding a tunable bandpass filter to change its wavelength. its finesse can also be tunable by adjusting the pump power. the wavelength tuning range of the dual - tunable fiber ring resonator filter is 39nm, from l526nm to l565nm
在基於摻鉺光纖環形腔結構基礎之上,通過在腔中加入的可調諧介質薄膜濾波器來選擇濾波波長,並通過調節泵浦功率來改變腔精細度,以實現一種濾波波長以及精細度雙可調諧的光纖環形腔結構窄帶濾波器。Being key components of optical fiber communication, fabry - perot filters and fiber grating filters have been applied in optical sources, wdm multiplexing and de - multiplexing, and add - drop multiplexing, wavelength routers, optical switching of all optical network etc., which greatly promote the advance of high. speed optical communication technology
而法布里-珀羅濾波器和光纖光柵濾波器是現代光通信系統中的關鍵器件,它被廣泛應用於光纖通信的各個關鍵環節,從光源、波分復用的分波和合波,到全光網路的上下路、波長路由;光交換等。The principle and characteristics of ofdm system are introduced first. then several key technologies of channel estimation and equalization for ofdm are discussed in detail, including pilot signal based channel estimation methods, cyclic prefix based channel estimation method, frequency domain adaptive filtering method and time domain equalization method for long channel impulse. the corresponding comparison and simulations are also provided
文中討論了利用導頻信號的通道估計方法,利用循環前綴進行通道估計的方法, ofdm信號均衡中自適應濾波技術,及通道沖擊響應長于循環前綴時利用時域均衡減少解調器輸入信號拖尾長度的方法,分析了這些方法的原理,並通過計算機模擬驗證了這些方法的性能。Based on the analysis of autonomous underwater vehicle ( auv ) sensor failure, diagnosis methods corresponding to three kinds of sensor failure are presented, that is, through that no sensor output for a long time to diagnose the fault of sensor signal gathered keeping unchanged, linear smoothing to solve the vibration of sensor signal, wavelet transform to inspect the broken sensor signal
摘要在分析水下機器人傳感器故障形式的基礎上,對傳感器可能出現的三種故障形式分別給出了相應的診斷方法,即通過傳感器長時間採集不到數據來診斷傳感器信息保持不變的故障,線性平滑濾波解決傳感器輸出振蕩,小波變換檢測傳感器信息的突變。This paper has studied and set up a supervision and control system based on the backing item of jinzhou yangtze river bridge with main span of 500m, by analyzing the development of construction control of cable - stayed bridges in china and abroad, foreword calculation of 250 work cases of plane bar fem, adoption of advanced equipment and devices, quick analysis of gathered data research of karemen filtering method, least square and gray model gm ( 1, 1 ) into the identification of the real state and precuts and effective manage mechanism
本文以荊州長江公路大橋主跨500米的混凝土斜拉橋施工為應用背景,通過分析目前國內外大跨度混凝土斜拉橋施工控制現狀,結合該橋施工實踐,運用平面桿系有限元計算理論對大橋250個工藝進行正裝計算,採用先進測試設備和儀器,利用計算機快速分析處理技術對現場監測系統收集的數據進行誤差分析,系用卡爾曼濾波法、最小二乘法和灰色理論gm ( 1 , 1 )進行結構真實狀態的識別和後期預測,通過科學高效的監控管理機制的運行和監控實踐,探索並建立了一套適合於大跨度混凝土斜拉橋的施工監測監控體系。分享友人