限幅的 的英文怎麼說
中文拼音 [xiànfúde]
限幅的
英文
clipped-
Research on the optical limiting properties of 4 - ethynyl - 4 ' - n, n - dihydroxyethylamino azobenzene
二羥乙基胺基偶氮苯基乙炔的光限幅性能研究We have made benefic trials on the research of optical limiting materials
對于實用性光限幅材料的研製,本論文作出了有益嘗試。We have made benefic trials on the research of optical limiting materials with abroad protective wavelength, high optical density and high transmission
對于多波段,高光密度,高透過率的光限幅材料的研製,本論文做出了有益的嘗試。Counteraction technology for correlative intermodulation products based on soft iimited transparent transponder in dsss
系統中用於軟限幅轉發器的相關互調分量抵消技術However, after co - porphyrin is kept in 1, 4 - dioxane for two weeks, excited by 488nm, it shows apparent reverse saturable absorption and enhanced optical limiting effect, which can be attributed to the absorption cross - section change of exicited state in co - porphyrin derived probably from the production of co ( iii ) - porphyrin due to oxidation of 62 on co ( ii ) - porphyrin
鈷卟啉( co ( ) tpp )對457 . 9nm 、 514 . 5nm和488nm波長的光都具有限幅作用,並對457 . 9nm波長的光呈現明顯的飽和吸收。放置半個月的樣品在488nm波長光的作用下表現出明顯的反飽和吸收,並且其光限幅特性在488nm處表現出增強效應。Application of a new digitronik in double cross limit combustion control of heat treating furnace
一種新型可編程數字調節器在交叉限幅控制方案中的應用Fractal coding has been proved useful for image compression. it is also proved effective for content - based image retrieval. in the paper, we present a block - constrained fractal coding scheme and a matching strategy for content - based image retrieval. in this coding scheme, an image is partitioned into non - overlap blocks of a size close to that of a query iconic image. fractal codes are generated for each block independently. in the similarity measure of fractal codes, an improved nona - tree decomposition scheme is adopted to avoid matching the fractal codes globally in order to reduce computational complexity. our experimental results show that our coding scheme and the matching strategy we adopted is useful for image retrieval, and is compared favorably with other two methods tested in terms of storage usage and computing time
分形編碼在圖像壓縮方面取得了很好的效果,同時,分形編碼也能夠用於基於內容的圖像檢索.本文提出了一種基於塊限制的分形編碼演算法和匹配策略,並將它們用於圖像檢索.在我們編碼演算法中,圖像會被預先分成互相不重疊的子圖像塊,然後對這些子圖像進行獨立地分形編碼,從而獲得整幅圖像的分形碼.該編碼演算法能夠在很大程度上減少編碼時間.在進行圖像間相似性的匹配時,我們採用改進的基於九叉樹的分配策略,從而避免全局地進行分形碼的匹配,減少了計算量.實驗結果說明,我們的編碼演算法和匹配策略能夠比較有效地應用於基於內容的圖像檢索,在計算時間和存儲時間上都優于實驗中其它兩種方法The linear and nonlinear optical properties of these compounds have been systematically studied. the following parts are included in this thesis : one - photon and two - photon fluorescence ; upconversion superradiance and cavity lasing properties ; the optical power limiting effect of these compounds ; and so on. tpa absorption coefficients have been got by z - scan method
3 、系統研究了它們的線性和非線性光學性質,主要包括:單、雙光子熒光,上轉換超輻射和腔激射性能及其效率,光限幅效應,用z - scan的方法得到了其雙光子吸收截面。That is, using a soft thresholding to remove noise components from the wavelet coefficients of the voiced and unvoiced speech in noisy speech respectively in a different way, which is not only removing noise but also is preventing the quality degradation of the unvoiced sounds and enhancing the signal - noise ratio
該方法採用軟限幅函數對濁音和清音信號的小波變換系數作不同的閾值處理,既抑制了噪聲,又減少了語音段信息的損失,提高了信噪比。Superior frequency characteristics shortest recovery time, realize the switching of the circuit, complete functions such as open and close, clip wave, wave detector, high - frequency rectifier, logic control, which fit for all kinds of digital circuits and analog circuits
具有良好的高頻開關特性反向恢復時間短,可實現對電路開和關的控制功能,可完成開關限幅檢波高頻整流邏輯控制等功能,適用於各類數位電路類比電路。In the two - photon resonance case, part of the input pulse energy is transformed into higher and lower frequency components through amplified spontaneous emission and four - wave mixing, and the medium shows strong optical power limiting effect
在雙光子共振情況下,即入射脈沖頻率等於1 、 3能級之間的共振頻率的一半,由於介質中放大的自發輻射和四波混頻的作用,部分入射脈沖能量轉化為高頻和低頻電場成分的能量,分子介質表現出了很強的光功率限幅特性。Phalocyanines are a kind of centrosymmetric planar organo - metallic molecules with an extensively delocalized two dimensional conjugated - electron system which show a relatively large third order optical nonlinearity, varying upon central metal atom substitution and other factors
金屬酞菁配合物是一種具有平面共軛電子結構的大環配合物。研究表明,酞菁配合物在可見及近紅外波段具有良好的非線性光限幅性能。The capacitance offset averaging network is used in the distributed track - and - hold circuit block of the designed system. finally, according to the analysis on error effects in adc, the mathematics error model is simulated. furthermore, the input - output characteristics including input -
最後,基於對a / d轉換器系統中誤差的分析,對其誤差數學模型進行了模擬,得到了包含延遲、限幅、諧波失真等誤差的輸入輸出特性曲線。In the lowest order, for the propagation of solitons in an inhomogeneous dusty plasma composed by two kinds of dust grains with different masses, if the interface of two kinds of dust grains in an inhomogenous dusty plasma is discontinuous, the tra nsmision and reflection waves both can be described by the kdv equation
2在非均勻塵埃等離子體中,對于小的、但有限振幅的長波振動,孤子可用kdv方程(或kdv型方程)來描述,而且電勢孤子的傳播情況在定性上與離子等離子體中電勢孤子的傳播情況一致。Thirdly, the relative theories of the limiter and rectifier are studied. in order to make the passive responder work stably under the conditions of large dynamic range of the receiving power and the high efficiency requirement, a two - stage limiter circuit and a voltage - doubler rectifier circuit with several diodes parallel are developed
3 ,對應答器地面裝置中的能量轉換電路進行了研究,針對應答器地面裝置接收到的載波功率具有大動態范圍的特點以及系統能量轉換的高效率要求,設計了一種兩級級聯二極體限幅電路和多管並聯的倍壓整流電路。Aiming at wide variations in loads and moment of inertia, large disturbed moment of a permanent magnet synchronous motor position servo system, and the problem of velocity limit to uniform sliding mode control, a cascaded compound slide mode controller was proposed and designed for permanent magnet synchronous motor position servo system
摘要針對某永磁同步電動機位置伺服系統負載力矩和轉動慣量變化大、干擾力矩強的特點,以及統一滑模變結構控制速度限幅的難題,提出並設計了串級復合滑模變結構拉制器。When the interaction length or gain coefficient is changed, the sbs threshold is changed, and the intensity value of optical limiting is altered
當改變相互作用長度或者介質增益系數,即可以改變受激布里淵散射的產生閾值,進而改變輸出脈沖空間限幅的幅值。In order to enhance the rapid reaction performance and regulate the current of main circuit in real time, a current loop ' s controller is set up inside the speed loop, it takes the pi regulator for the current loop ' s controller, which can make the output limited
為了能夠盡量的提高伺服控制系統的反應快速性,並且能夠為了實時的對主電路的電流進行檢測調節,系統在速度環的內部設置一個電流反饋環並且以帶輸出限幅的pi調節器作為電流環的控制器。The forward calculation of control signal and back - propagation of network - weight modification equations are given, along with the principle to specify the initial net - weight values. the output of the network is set with limit. simulation shows turbine controlled with the n - pid governor can achieve good static and dynamic characteristic
推導出了n - pid控制器的前向演算法和反傳演算法,討論了n - pid網路權重初值的確定和對輸出進行限幅的處理,在對使用n - pid控制器的水輪機調節系統所作的模擬實驗中,獲得了良好的動態和靜態性能。This paper goes on with analysis of the phased array radar calibration theory and compare of different schemes, then the best is adopted. 2 mhz digital circuit mainly composed of dds ( direct digital synthesis ) chip, which carries out the shift of the phase and the limit of the amplitude, has been designed and debugged successfully. it is used to substitute for the conventional phased shift circuit and amplitude limiting circuit which work at the radio frequency, so the all - digital transmit channel of phased shift array radar is achieved
本論文研究的重點是:針對傳統相控陣雷達系統收發( t r )組件中的移相和限幅功能均在射頻段完成,大膽利用直接數字合成( dds )晶元組成頻率在2mhz左右的數字電路代替傳統相控陣雷達在射頻段進行移相和限幅的電路,從而組成全數字發射通道,使對相位和幅度的控制和調試更方便快捷,並設計具體的電路驗證此方案的可行性。分享友人