operation bandwidth 中文意思是什麼
operation bandwidth
解釋
工作帶寬-
The control tactics of space voltage vector are investigated, and the simplified algorithm which judges the sector location of reference vector and calculates switch operation time is put forward. by analyzing the current hysteresis control, the relation between switch frequency, and hysteresis bandwidth and input inductance of pwm rectifier is deduced. by applying instantaneous power theory, the principle of pwm rectifier power control is analyzed, and the direct power control by matlab toolbox through estimating active power and reactive power with virtual flux is realized, and the simulation results prove that it is correct
對常用空間電壓矢量控制策略進行分析，提出了給定參考矢量所在區間判斷的簡化方法，以及電壓矢量作用時間的求取方法；分析了電流滯環控制策略，推導出開關頻率與滯環帶寬以及整流器輸入電感之間的關系；應用瞬時功率理論分析pwm整流器功率控制原理，通過虛擬磁鏈估計有功功率和無功功率，用matlab實現了直接功率控制，並驗證了該控制方法的正確性。 -
Based on it, a new kind of helix slow - wave structure named elliptical helix slow - wave structure used in helix traveling wave tubes has been detailedly investigated. by studying the rf characteristics of this slow - wave structure, it ’ s found that higher operation frequency and interaction impedance will be obtained by increasing the eccentricity of helix or decreasing it of the shield. meanwhile, great potential of improving system bandwidth has also been found if the eccentricity of helix or shield or the two are properly choosed
本文對近幾十年大功率行波管的研究進展進行了簡單討論，並在此基礎上研究了一種可應用於螺旋線行波管的新型的螺旋線慢波結構，即橢圓螺旋線慢波結構，通過對該螺旋線高頻特性進行詳細分析，我們初步認為，選擇適當的螺旋線和屏蔽筒離心率，可以提高系統工作頻率，增加系統耦合阻抗，並且具有改善系統帶寬的潛力。 -
Become a kind of new electronics circuit - current - mode circuit. it is replacing the traditional design method of the voltage - mode in the high frequency high - speed signal processing realm 。 this thesis mainly discussed the modified second - generation current conveyors based on the current - mode kinds of new cuicuit components, they are stronger modified standard current - mode parts in fuctions on this foundation. mainly including the modified differential difference current conveyor ( mddccii ) 、 the fully balanced second generation current conveyor ( fbccii ) 、 ( full balances ) four - terminal floating nullor ( fbftfn ) and the current differencing buffered amplifier ( cdba ), they are all function very strong standard current - mode parts, they all can provide some circuit functions of better than general operation amplifier, because they have the voltage importation and the current importation, therefore use it since can carry out the voltage - mode signal processing circuit expediently, can also carry out the current - mode signal processing circuit expediently, and have to increase the benefit bandwidth to accumulate more widely than the voltage - mode, but have their advantages more according to the current - mode filter of the modified current conveyor, because it constitutes in brief, the filter wave function is stronger and they are better than in general use operation amplifier of many advantages, be easy to composing for example 、 high speed 、 frequency bandwidth 、 the power supply voltage requests low 、 consume small, the impedance is different from etc. advantages, otherwise they have biggish dynamic range, and flexible circuit synthesize, so they are the best active parts
從第二代電流傳輸器ccii入手，重點研究了以下幾種改進型的第二代電流傳輸器:改進的差動差分電流傳輸器mddccii 、全平衡第二代電流傳輸器fbccii 、多輸出四端浮地零器ftfn 、全平衡四端浮地零器fbftfn 、電流差分緩沖放大器cdba的電路結構及其模型。然後在此基礎上系統地研究了基於這幾種改進型的第二代電流傳輸器的濾波器的設計方法，主要方法和結果如下:利用mddccii設計了差分式連續時間電流模式低通、帶通濾波器;電流模式跳耦結構考爾低通濾波器;利用fbccii設計了帶通二階節濾波器及電流模式雙二階通用濾波器;設計了基於多輸出端ftfn的電流模式二階通用濾波器電路;通過數字化開關選擇的基於fbftfn的電流模式通用濾波器;設計了基於最少個數電流緩沖放大器（兩個cdba ）的多功能通用電流模式濾波器及其在非理想因素情況下分析。設計濾波器的主要方法是採用級聯設計、運算模擬（信號流圖法）和反饋設計（跳耦法） 。 -
In addition, compallng of anplementaton, security flexibility scalability and support of qos between these two models is provided. at the saxne time, mels vpn - - - - a solution for integrated model is discussed in detail, including network components of mpls vpn and its operation mode. there are also some problems that must be solved to build a mpls vpn, such as customer address space overapping, network accessibility constraini, vpn route updating, saving of backbone bandwidth, reducing of complexity of pe rooters and accessing internet from vpn, etc. mpls vpn can solve all the problems, as well as bring us some values in scalability, implemotation and maintenance
在此基礎上，詳細闡述了集成模型的解決方案? ? mplsvpn的工作原理，包括mplsvpn的網路構成和運行模式，對實現虛擬專用網所面臨的問題：用戶地址空間重疊、網路連通性約束、 vpn路由信息更新、節省骨幹網帶寬資源、降低pe路由器處理的復雜性以及如何在虛擬專用網內訪問internet等提出了解決方案，並對mplsvpn在擴展性、可實現性、可維護性方面的優勢進行了說明。 -
In order to measure the characteristics of such semiconductor optical amplifier, we adopted a set of measurement system. this measurement system can be used to measure the characteristics of all kinds of active or inactive optical passive components. such device presents good polarization insensitivity ( < 0. 9db ), wide 3db bandwidth ( > 33nm ) at 0 - 200ma and different input signal light wavelength and power, the maximum fiber - to - fiber gain of 10db, lossless operation current of 50 - 75ma for different input signal light wavelength and power, large extinction ratio ( > 50db ) and lower noise figure ( nf ) ( < 8db )
與張瑞英博士一起，首次利用該種有源區結構制備出偏振不靈敏半導體光放大器，並在0 - 200ma注入電流范圍內獲得33nm的3db帶寬，在不同信號波長，不同信號功率0 - 200ma的注入電流范圍內，偏振相關損耗均《 0 . 9db ，在耦合差損為7db / facet的條件下，最大fiber - to - fiher增益達10db ，無損操作電流為50 - 70ma ，消光比達50db以上，而噪聲指數則低於8db ，最小可達4 . 6db 。 -
The joint transform correlator ( jtc ) is paid more attention by researchers than the matched filtering correlator ( mfc ) with its advantages, such as high spatial bandwidth product, without integrated filtering and real - time operation etc. photorefractive crystals have some advantages, such as fast response, high spatial resolution and large storage capacity etc. we can exert both advantages by combining the photorefractive crystal with the jtc
與匹配濾波相關器相比，聯合變換相關器具有諸多優點，如空間帶寬積高、無需濾波綜合、易於實時操作等，所以近年來更加引起人們的研究興趣。光折變晶體具有響應速度快、空間解析度高、存儲容量大等優點。將光折變晶體與聯合變換相關器相結合構成光折變聯合變換相關器，就可以充分發揮二者的優勢。 -
Due to restriction with the array aperture transition time, traditional phased array radar works under relative narrow signal bandwidth, so this restricts the application of phased array radar in the field where high performance is demanded. however, optically controlled phased array radar ( ocpar ) adopts the photoelectron technology, counteracts the aperture transition time via the method of optical true time delay ( ottd ), so it can realize wide instantaneous bandwidth and squint - free operation ; meanwhile, it can realize the miniaturization of phased array radar and has super anti - electromagnetism interference capability
而光控相控陣雷達採用光電子技術，通過光實時延遲的方法來抵消孔徑渡越時間，可以實現相控陣雷達的寬帶寬角掃描;同時也可以使得相控陣雷達小型化，並具有強的抗電磁干擾的能力;另外，由於光纖傳輸具有損耗低、頻帶寬等固有優點，採用光纖連接雷達天線和雷達控制中心，可以使兩者的距離較採用同軸電纜有較大的提高，更有利於保護雷達控制中心。 -
Aal2 technology is much better than aal1 in the efficiency of bandwidth, especially according to the low rate operation, and could promise a good transmission quality
在帶寬利用效率上，遠遠超過了aal1 ，尤其是針對低速率的業務，而且在傳輸質量（ qos ）上，基本上能得到保證。 -
Therefore, the design of high performance interconnection network is important to the improvement of high performance parallel computer. the " effect of the bottle - neck " of electronic interconnection network limits operation speed, clock skew and interconnection bandwidth constraints, which can not be dealed with through technology
電互連網路不僅存在著「瓶頸效應」 、運算速度有限、時鐘歪斜、互連帶寬受限等問題，而且從工藝上也是無法解決的。 -
This paper opens out this system combining spm technology with vr technology on network, analyses the characteristic of the long - distance simulation training system inside and outside and in being spm training system, and for the first time brings forward the exploiture client end with java3d in b / s structure at home. the system offers the mutral interface for the longdistance users, the construction and the display of dimensional virtual scene, the inter - operation and the range of the scene, and so on. and it solves bandwidth of network and favorable interoperability problems well in the long - distance training
該系統將spm技術與網路虛擬現實技術相結合，分析國內外遠程模擬培訓系統特點，以及現有的spm培訓系統，在國內首次提出b s體系的客戶端用java3d進行開發，提供與遠程用戶交互的界面和介面、三維虛擬場景的構造和顯示、場景的交互操作和漫遊等，很好地解決了遠程培訓所必須具備的網路帶寬和良好的互操作性問題， java3d這一新技術的應用使本系統呈現出嶄新的面貌。 -
However, as the development of data and multimedia services represented by the internet services continues and the situation of telecommunications operation changes, the environment of traffic transfer has change a lot. in providing packetized and new services, the traditional sdh transfer network has disadvantages such as complex service assignment, low bandwidth efficiency, high cost and poor network expandability
但是可以看到隨著以internet為代表的數據業務和多媒體業務的不斷發展，電信運營格局的變化，業務的傳送環境發生了很大變化，傳統的sdh傳送網對于基於分組化的業務和新的業務提供方式，存在著諸如業務指配處理復雜，帶寬效率低，成本高，網路擴展性差等缺點。 -
Currently, the railway emergency communication systems rely only on the previous communications systems. because the bandwidth is limited, it supports a few services, low transmission rate and transmission efficiency. this affects seriously the emergency services operation
目前，鐵路應急通信主要依賴鐵路沿線通話柱這個單一接入手段，其有限的帶寬，致使承載業務少，傳輸速度慢，傳輸效果差，嚴重影響應急搶險指揮工作。 -
The network will merge the high dependability, possibility of upgrading, real - time character and convenience to use of the existing pronunciation network and the high bandwidth, low cost, fast & high - efficient data network. the new network have integrated optical, atm / ip and gigabit process ability of multiple business and cover many kinds of method, such as wired, wireless, pronunciation, data, video, etc. it also can customize for consumer depending on the business operation mode choosing by the customer
這一網路將融合現有語音網路的高可靠性、可升級性、實時性、易用性等特點，以及數據網路的高帶寬、低成本、快速高效等特點，具有集成了光、 atm ip和吉比特處理能力的多業務核心，覆蓋有線、無線、語音、數據、視像等多種手段、多媒體業務的帶寬，以及為客戶量身定製，由客戶選擇、驅動的業務運作模式。 -
The bandwidth available to a grid and that used by the grid in its normal operation
網格可用的帶寬和網格正常操作時使用的帶寬。 -
Moreover, cutting the top patch into two or three sub - patches can meet the dual - band even multi - band operation. the effects of mobile handsets case and bandwidth are investigated chapter 2 gives system concerns of mobile antenna design
此外，頂部貼片劃分為兩個或者更多的小貼片能夠使天線在雙頻、三頻甚至多頻工作。
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