beam channel 中文意思是什麼
beam channel
解釋
槽形梁-
We also present a low - complexity general channel simulation model for both transmitter diversity case and downlink beam - forming case. finally, we implemented the mimo channel model by dsp, introduced the software and hardware platforms of the channel simulator
最後，用dsp對所建立的多入多出通道模型進行了模擬實現，並介紹了整個硬體電路板的整體結構，給出了通道模擬器的軟體實現過程。 -
In the next generation of wireless communication, the base station antenna should have these functions : integration of different diversity methods to release multi - path fading, beam - downtilt to reduce co - channel interference, beam - forming to optimize coverage
在設計新一代移動通信基站天線時，應使天線能綜合各種分集方式進行天線分集以消除多徑效應，具有波束下傾以減少同頻干擾，能波束賦形以實現優化覆蓋。 -
Chapter 2 : characteristics of propagation of ultra - intense laser beam in a partially stripped preformed plasma channel is discussed, in which the relativistic self - focusing effects, together with the perturbed plasma density, is discussed
第二章：本章闡述了超強激光光束在拋物型部分電離的預等離子體（聚焦和散焦）隧道中的傳輸特性。研究了相對論自聚焦效應和等離子體波引起的密度擾動對傳輸的影響。 -
Besides one h - steel production line, we have three specialized production lines altogether, which can produce the round steel, screw steel, h - beam, channel steel, angle steel, i - beam
我公司下屬軋鋼廠一個，焊接h型鋼生產線一個，共有三套專業生產線，可以生產各種圓鋼、螺紋鋼、工字鋼、槽鋼、角鋼、 h型鋼。 -
Then we introduce the character of the atmosphere channel, which we emphasized on the atmosphere scatter, absorption and scintillation ' s effect on the laser beam. in chapter, we explain why we used cassegrain telescope to collect the optical signal at first, then the lightsource, detector, front amplifier used in optical communication has been compared to that of fiber communication, the noise including shot noise, thermal noise and background light noise has been explained here for analysis the snr and ber in the next section
在第三章介紹無線光接入系統的光收發單元，採用多孔徑卡塞格倫式的收發天線對消除減小大氣湍流影響有較大作用，針對大氣通道的特點無線光系統收發單元在光源、光探測器、前置放大電路上存在許多有別于光纖通信的技術，同時還闡述了光接收機包括背景噪聲的噪聲機制和接收靈敏度、誤碼率等指標，最後給出了一個整個傳送鏈路的功率預算。 -
The company has advanced technologies and the first - class equipment of examination and test of products. main products as below, raw elevator guide rails, container beam channel, forklift beam channel, mine using inclined beam channel, tire steel, ship - making bulb steel, track steel, equal angle bar, angle with unequal, silicon steel sheets, etc. and among them, bulb steel and track steel are the special kinds of products paid much attention by country
公司技術力量雄厚，檢測設備一流，產品主要有：電梯導軌毛坯集裝箱槽鋼叉車槽鋼礦用斜槽鋼汽車輪輞鋼船用球扁鋼履帶鋼等邊角鋼不等邊角鋼矽鋼片等，生產的「上三牌」電梯導軌毛坯技術含量高，是全國信得過產品，具有國際信譽。 -
In the following chapters, a 16 - channel experimental phased array ultrasonic testing system is thoroughly explained, including digital beam forming, low noise programmable amplification of received ultrasound signal, multi - channel hi - speed hi - precision data acquisition, hi - speed real - time processing of multi - channel ultrasound signal, and hi - speed data transfer based on pci bus. in addition, the frame of software system is built
本文詳細闡述了作者所獨立研製的16通道相控陣超聲檢測實驗系統，包括數字化超聲發射/接收波束形成、超聲信號的低噪聲程式控制放大、多通道高速高精度數據採集、多通道超聲信號高速實時處理、基於pci總線的高速數據傳輸等全部電路模塊的結構及工作原理，並說明了所編寫的底層軟體系統的框架。 -
3. polycrystalline lif thin films were grown by thermal evaporation on amorphous substrates. properties of broad band photo - luminescence at room temperature of active channel ( f2 and fa + ) produced by electron beam irradiation were studied
首次用熱蒸發法在玻璃襯底上制備了多晶lif薄膜平面波導，研究了由電子束照射產生的有源（ f _ 2和f _ 3 ~ +色心）溝道的室溫寬帶光致發光特性。 -
We give a brief theoretic analysis of using delayed self - controlling feedback to control beam halo. s ( the length of one period of focusing channel ) is selected as the delay parameter of the controller and the maximal lyapunov exponent is calculated
經分析，確定了延遲反饋控制器的延遲參數為s （一個聚焦磁場通道周期） ；而後，計算了系統的最大李雅普諾夫指數。 -
In the case of single - channel magnetic guiding, we calculate the relationship between the guiding efficiency and electric current or the transverse temperature of atomic beam. we also propose several atom - optical elements base on the uccc
本文也計算了單通道磁導引情況下，原子導引效率和電流、原子束橫向溫度之間的關系，並採用u -型載流導體構建了多種原子光學器件。 -
By the ray tracing in the channel waveguide, the dependency of the launching efficiency on the relative position of the pumping beam to the waveguide is analyzed and the coupling conditions are optimized
通過幾何光學法追跡泵浦光線在波導中的傳播，系統地分析了泵浦光束與波導相對位置變化對泵浦耦合效率的影響，進而確定最佳耦合條件。 -
The study of srs in non - linear optic fiber by simulink emphatically. the initial intensities of pump beam and stokes beam are similar, and small signal gain theory needs to amend have been pointed. srs comply with the special growth law, does not have " threshold " characteristics. lt depends not only on the intensity of pump beam but also on the intensity of stokes beam itself. even if the intensity of pump beam is weak, fhe srs effect is maybe still take place. in addition, the problem about srs effect depends on the number of channels, power in each channel and space of the channels, in a dwdm system has been studied
並著重論述了如何利用simulink研究非線性光纖光學中的受激喇曼效應，指出在光纖通信的情況兩個光束的初始強度相差不多時，小增益理論需要修正。 srs遵從特殊的增長規律，並不具有「閾值」特性。 stokes束的增長不僅依賴于泵浦波的強度，而且也和自身的強度有關系。 -
Firstly, the study of real two - channel data recorded by the airborne battlefield radar is made based on the methods of gmti, which including the study of methods of two - channel equilibrium, that of the precious estimate of beam scanning angle, that of the doppler center, that of the compensation for pattern error and that of gmti and that of location of the moving target using the phase - comparison mono - pulse method
首先，結合動目標檢測方法，對機載遠程戰場偵察雷達實驗系統錄取的雙通道數據的處理進行了研究。內容包括兩通道均衡方法研究，波束掃描角精確估計方法研究，多普勒中心估計方法研究，方向圖誤差補償方法研究，動目標的檢測和干涉定位方法研究。 -
This kind of switch use the unilateral fin - line as the basic transmission line, the beam lead pin diode of alpha co. ltd is the control element, there is two diodes in each channel and they are welded in circuit in parallel connection
本課題主要研究的是毫米波鰭線pin管單刀雙擲開關。該開關採用單側鰭線作為基本傳輸線，控制器件選用alpha公司的梁式引線pin二極體，每路使用兩只，採用並聯形式焊接在電路中。 -
Due to the different values of incident angle, there are two different propagation formats. one case is that the beam is finally trapped in a guide - like channel and propagates stably along the channel when the launching angle is smaller than a critical value. otherwise, it will propagate along the incident direction all along
由於入射角度的取值不同，格子孤子具有兩種不同的傳輸方式:當光束入射角小於某臨界角度時，光束可被類似波導形式的路徑俘獲，轉而沿該路徑向前傳輸;當光束入射角大於該臨界角時，孤子則不會被俘獲，而是沿著光束的入射方向直線傳輸。 -
In this new protocol : 1 ) channel reservation decision and the event of hearing rts / cts are separated ; 2 ) channel reservation rules are newly redesigned ; 3 ) two items are added into rts / cts frame for nodes to make a channel reservation decision ; 4 ) a new signaling frame, beam pattern change ( bpc ) frame, is adopted in order to release the protocol aggressiveness
該協議所做出的改進有: 1 ）通道預留判決不再與是否收到rts / cts幀直接相關; 2 ）通道預留判決的觸發時機以及具體規則被重新設計; 3 ）在rts / cts幀加入了兩項新的內容方便節點做通道預留判決; 4 ）增加了一條新的信令幀bpc （ beampatternchange ）幀，用於進一步釋放協議積極性。 -
Thirdly, the principle in realization of d / a using on - chip pwm channel in the tms320f2812 - based system is analyzed. some methods of spwm, specially, nonsymmetry regular sampling are studied. avc system based on pwm technology is realized. finally, active vibration control experiment is performed about the first vibration mode of cantilever beam
三、研究了利用pwm通道實現da功能的工作原理，選用精度相對較高的不對稱規則采樣演算法，利用dec2812設計並實現了基於脈寬調制技術的數模轉換系統，完成了數據採集， ad轉換， pwm波輸出的全過程，並對轉換結果進行了誤差分析。 -
Millimeter wave single pole multiple throw switch is one of the most important device in multi - channel system, widely applied to multi - beam radar, phase array radar system, electronic warfare system, and so on
毫米波單刀多擲開關是毫米波多通道轉換的重要部件，廣泛應用於多波束雷達、相控陣雷達、電子對抗技術等方面。 -
And a novel approach to prepare optical masks by using spatial light modulator for light - induced various waveguides, even a whole circuits is proposed. ( 4 ) fabricating planar and channel waveguide arrays in sbn : cr, linbo3 : fe and knsbn : ce crystals under illuminations of two - beam and four - beam interferograms are detailedly investigated both theoretically and experimentally
從理論和實驗兩個方面對利用雙光束和四光束干涉形成的光場在sbn ： cr 、 linbo _ 3 ： fe和knsbn ： ce晶體中寫入平面波導陣列和通道波導陣列的方法進行了詳細的研究。
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