放寬系數 的英文怎麼說

中文拼音 [fàngkuānxìshǔ]
放寬系數 英文
looseness factor
  • 放 : releaseset freelet go
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 放寬 : relax restrictions; relax
  • 系數 : [數學] coefficient; ratio; modulus; quotient; factor
  1. This paper starts the research of the liquid floated pendulous accelerometer testing system according to the engineering. at first, this paper gives the brief introduction of the history and present status of accelerometer and its testing technology, the working principium and math model of the liquid floated pendu - lous accelerometer, and then, decides the binary width pulse force retrim loop as the design proposal of testing system, researches the transfer function of every part in the system emphasizly, analyses the stability of the whole accelerometer testing system from the angle of control theoretics by the open loop transfer function of system, and designed the correcting net, analyses the basal problems such as resolution, sampling restraint, precision and so on, designs the hardware testing circuits such as preamplification, band - pass filter, alternating amplifier, phase sensitive demodulatorn, pulse - width modulation, frequency scale circuit, moment current generator. finally, using the graphics program language labv - iew which is designed for testing field especially by ni accomplishes the solfware design of testing system, realized the testing functions

    首先對加速度計及其測試技術的發展歷史和現狀，液浮擺式加速度計的工作原理和數學模型等作了簡要的介紹，然後確定了以二元調寬脈沖再平衡測試迴路為設計方案，並從控制理論的角度進行了分析，著重研究了系統中各部分的傳遞函數，利用系統開環傳遞函數分析了系統的穩定性，同時設計了系統的校正網路;分析了二元調寬脈沖再平衡測試迴路的解析度、采樣約束以及測試精度等基本問題，並按照系統分析的結果設計了包括前置放大、帶通濾波、交流放大、相敏解調、脈寬調制、頻標電路以及力矩電流發生器等測試系統各部分硬體電路，驗證了電路的正確性，最後按照測試系統的要求，採用了美國ni公司專為測試領域所開發的虛擬儀器工具? ? labview作為測試軟體開發工具，利用該圖形化編程語言完成了測試系統軟體部分的設計，實現了測試功能。
  2. Teachers in the past put much time and many efforts in the * so - called " exercises sea tactics ", but students still can not achieve good ideation as well as the examination results., in the recent years, thanks to the recognition of the agile and integrative application of the basic knowledge as the college entrance examination focuses closely on the general outline of the texts, teachers hence have an opportunity to pay much attention to working over the texts, laying solid foundation and fostering ability for the students. this article describes, through teaching practice, mainly on how to " press close to the texts while insist on necessary versatility ", it includes : 1. design the scene of the question so as to introduce the topic, emphasis on the knowledge process

    這篇文章主要通過一些教學實踐談談如何「貼近課本，有所變通」 ，主要從如下幾個方面進行闡述： （ 1 ）設計問題情境引入課題，注重展示知識的形成過程（ 2 ）注重變式教學，挖掘課本中例題、習題的內涵，或將原例題中的條件或結論改變一下，使之成為一個新例題；或將教材中的一些例題、習題改編為_些開放題進行教學，培養學生的創新能力和創新精神；或對課本例題、習題的解法來一個拓寬，探索其多解性（ 3 ）重視課本知識的歸納，培養學生的概括能力（ 4 ）將課本中的數學問題與生活中的實際問題聯系起來，強調數學的應用（ 5 ）在講解例、習題的過程中，融入數學史和數學的美學知識，激發學生的學習興趣。
  3. Under consideration of the effects of the life time of nd : yag lower level on extracted energy from amplifier, a numerical model and calculation program incorporated the effects of the pulse width on amplifier energy extraction is proposed. the calculated results are compared with the experimental data of a slab mopa dpl system setup previously and then the model is modified according to experimental results

    考慮到nd ： yag激光下能級壽對放大器能量提取的影響，建立了脈寬對放大器能量提取影響的數值計算模型及程序，計算結果與已建立的板條mopadpl系統的實驗數據進行了比對並對程序進行了修正，提高了程序的可靠性。
  4. It is found that the current amplification coefficient strongly depends on the spin polarization of the electrons injected from the emitter to the base, the spin relaxation time and the width of the base

    自旋晶體管中的電流放大系數主要取決于注入基區的自旋極化電子的極化程度，基區中自旋的馳豫時間及基區的寬度。
  5. So, the emphases are put on this part. first, all sources of noise are analyzed and calculated to determine the parameter of component and estimate the feasibility of the system. second, on the one hand, low noise wideband and high gain amplifier is detailed particularly in the design of hardware, on the other hand, several mathematical methods are introduced to reduce the noise further in the design of software

    首先，詳細分析了整個系統的噪聲來源，計算可能出現的噪聲，在器件的選擇上對參數提出要求，並分析方案的可行性；其次，在硬體設計上，兼顧帶寬，噪聲與放大倍數；在軟體設計上，採用累加平均，最小二乘擬合等信號處理方法，進一步降低噪聲。
  6. Based on these foundations, we give a perfect scheme of the bbo opos : single pass amplification coefficient of the opg under different pump intensity is calculated ; collinear type - i and type - ii phase matching tuning curve pumped by the q switch nd : yag various harmonics as well as noncollinear type - i tuning curve are calculated in details ; the effect of the walkoff for the nonlinear effect coefficient and the group velocity matching are analyzed ; the acceptance angle in parametric process is calculated ; the numerical threshold of the bbo opo is calculated ; the process of the saturation and depletion of the pump beam are analyzed ; the relationship of the conversion efficiency and reflectance of output mirror are discussed ; various linewidth controlling methods are discussed ; the improvement of the beam quality applying the unstable cavity is discussed ; and the crystal bbo design is considered

    在此基礎上，給出了一整套bbo - opo激光參數設計方案：計算了不同泵浦強度下的參量放大倍數；詳細計算了在nd : yag調q激光器各次諧波泵浦條件下的共線類和類相位匹配的調諧曲線，以及非共線類相位匹配調諧曲線；分析了走離角對非線性系數和群速匹配的影響；計算了參量過程的允許角；計算了bbo - opo的理論閾值條件；分析了飽和與泵浦光束的消耗過程；給出了轉換效率與超過泵浦閾值的倍數的關系；討論了轉換效率與輸出鏡反射率的關系；討論了線寬控制的各種方法；研究了利用非穩腔改善光束質量的方法；考慮了bbo晶體的設計。
  7. The paper is concerned with periodic solutions to nonautonomous second order hamilton systems where, m : [ 0, t ] - s ( rn, rn ) is a continuous mapping in the space s ( rn, rn ) of symmetric real ( n x n ) - matrices, such that for some u > 0 and all ( t, z ) [ 0, t ] x rn, ( m ( t ) x, x ) > u | x | 2. a s ( rn, rn ), f : [ 0, t ] x rn r is continuous and f : [ 0, t ] xr r exists, is continuous and we study the existence of periodic solutions of the systems by using ekeland variational principle and the saddle points theorem. we suppose that the nonlinearity vf and potential f belongs to a class of unbounded functional. our work improves the existed results. we obtained the results of multiplicity of periodic solutions of the systems by using lusternik - schnirelman category theory and the generalized saddle points theorem, and the functional does not need the condition of constant definite. at last, we obtained the existence of infinity many distinct periodic solutions of the corresponding non - perturbation systems by using the symmetric mountain pass theorem

    （ ? ， ? ）為r ~ n中內積， | ? |為對應范數。 f [ 0 ， t ] r ~ n r連續， ? f （ t ， x ）存在且連續， h l ~ 1 （ 0 ， t ； r ~ n ） 。利用ekeland變分原理和鞍點定理討論了該系統周期解的存在性，把非線性項和位勢函數放寬到一類無界函數，推廣了這方面工作的一些已有結果；利用廣義鞍點定理和lusternik - schnirelman疇數理論得到了該系統的多重周期解，取掉了泛函的常定要求；最後利用對稱山路定理得到沒有擾動時系統的無窮多周期解。
  8. Firstly, the system has a good snr and high accuracy, which is owed to wideband operational amplifier being used, accurate adjustment by da, 12 - bit high sampling ad converter being applied. secondly, data transmission becomes less by using forecasting code technology and dictionary compress technology, which are run by dsp on board

    本採集系統採用400mhz增益帶寬積的運算放大器，運用da高精度校準技術，並選用高采樣率低噪聲的12位ad轉換晶元進行模擬電路和ad轉換電路設計，既保證了數據採集系統的信噪比，又提高了系統測量精度。
  9. Most drive systems offer a choice between transistorized silicone - controlled rectifiers and pulse width modulation over the full range of amplified voltages

    大多數驅動系統提供兩個調節全程放大電壓的選擇：晶體管化的硅樹脂控制整流器和脈沖寬度調制器。
  10. In order to supply the main two services ? vod ( video on demand ) and iptv which are used popularly in the application, 8010r & d designed a new streaming media system based on our new operating system named digital organic system ( dos ) with high dependability, high concurrence, low - price - high - efficiency and high retractility as its characters. in our stream media system, there are three important components

    當前政府正在大力推廣internet及寬帶網路，加之正在興起的網路電視計劃，這些因素極大的推動了網路流媒體業務的迅速發展。針對目前流媒體應用最廣泛的視頻點播和在線直播服務， 8010實驗室自主研發了具有高可靠性、高並發性、高性價比及高伸縮性的數字有機體流媒體播放系統。
  11. On data transmission it use the streaming media technology and it make fluent playing in the net. on synchronize playing of multimedia it use smil language and it make the exact synchronization and automatic change media files in line with users " band. on the integration with the distributed resource web it use web service technology and make it can make seamless integration. it is more straight because of the incorpation of time thread and page

    《 k12非編多媒體課程製作系統》在數據交換上採用了「國際語言」 xml ，這使該製作系統能更好地與其它系統交換數據；在數據傳輸上採用了流媒體技術，這使製作的多媒體課程在網路上的播放更加流暢；在多種媒體的同步播放上採用了smil語言，這使多種媒體在網路上播放時能準確同步，並能自動根據用戶帶寬選擇媒體文件；在與分散式資源庫的整合上採用了webservice技術，這使該製作系統很方便地實現了與分散式資源庫的整合；由於採用時間線與頁相結合的方式，亦使系統製作更加直觀。
  12. In succession, the theory of chirped - pulse amplifier system is given in detail, firstly, studying from designing experimental light road and optical components to theoretical analysis, we par ' tly finished the system by ourselves. about ultr a - shoft pulse with a pulse - width of 9. 8f s and output power of 650mw and band - width of about l 20nm is output from oscillator source, secondiy, the stretching capacity of single grating four - pass stretcher is measured using abcd matrix combining collins function, and the effect of relativ e parameters to the streching ratio is also simulated. thirdly, a new type of disjunctional frequency moduiating function is provided according to the gain - narrowing and gain - saturation which are appeared in the co urse of amplification, under modulating the two effects are both controlled on some e xtent, fourthiy, the effect of ase that is often ignored by people is analyzed and the resolving methods are also given

    從光路、光學元件的自行設計到理論分析計算，初步建立了一臺實驗系統；採用abcd矩陣法結合collins公式計算了四通式單光柵展寬器的展寬量，並模擬了相關參數對展寬比的影響，對實驗具有指導意義；評價了再生放大器和多通放大器的優缺點，對放大過程中通常忽略的放大自發輻射現象（ ase ）進行了分析，並提出了相應的解決方法；針對放大過程中出現的增益窄化和增益飽和現象，對輸入種子脈沖提出了一種新的分段頻率調制函數，實現了對增益窄化效應和增益飽和效應的共同抑制；提出了系統的材料（包括放大介質和光路中的普通介質）正是融合高階色散的來源。
  13. That means the state will pay more attention to the macro - regucation to the specialities distributed, the scale and the profit, while the pe institute will be given more power for designing the structure of the subjects ; the influence of the market on the subject designing will be enhanced ; the suitableness and the practicalness of the subject designing will be enhanced further more ; the subject designing model will turn to the conotation styled ", the variety of the subjects will be reduced, and the specifications will be of the majors developed ; the extensive, outdated and simplistic subjects structure will he replaced by the systematic and varied owe one

    21世紀我國高等學校體育本科專業設置五大發展趨勢，即國家將更加重視對專業布局、規模和效益方面的宏觀調控，而體育院校在專業設置方面將被賦予更多的自主權；市場導向對專業設置的影響將進一步增強；專業設置的社合適應性和實用性進一步加強；專業設置將更注重「內涵式」發展模式，專業種數將繼續減少，專業口徑將進一步拓寬；系統、多樣化的新型專業結構將替代原有粗放、單一的專業結構。
  14. Second, the popularization and application of internet technology has a revolutionary impact on the compiling and publication of the academic journals and gives a lot more and newer to the editorial work : sufficient information supplies editorials with a good environment to make in - advance plans ; the open and comprehensive information system makes editorials compile journals and update reviewer database in time and accurately ; editorials can accept papers and submit papers for reviewing by internet communication tools ; editorials can also contact the authors conveniently by emails for decline or revision of the papers ; the department of editorial and print plant can exchange data through the net for printing hard copies ; more sale methods are made based on the internet ; more ways are made for readers " feedback

    其次，網路技術的普及和應用還使學術期刊編輯、出版的工作方式發生了變革，賦予了編輯工作更多更新的內容：信息量的充分為編輯制訂計劃創造了良好的信息環境；信息的開放與全面使編輯可以及時準確地組稿和更新審稿人數據庫，編輯還可利用網路通信工具實現稿件送審；可以利用網路及時與作者聯系方便稿件的退修；對印刷版，可以利用網路方便地在編輯部和印刷廠之間傳遞數據；為期刊網上發行渠道的開通提供了平臺；拓寬了讀者反饋的途徑。此外，學術期刊光盤版和網路版的出現為學術期刊的經營提出了一種新的模< wp = 4 >式。
  15. Based on the work of the former people, in this paper, we mainly studied the effect of the driving field phase fluctuation, the effect of gaussian transverse profile of the driving and laser fields, the doppler effect and so on for the open v - type lwi system

    本文在前人工作的基礎上主要討論了開放的v型三能級系統中驅動場的相位漲落、驅動場與激光場的橫向效應以及doppler展寬對產生無反轉激光的影響，並討論了系統其他各種參數的作用。
  16. The analytical solutions of the gain, dispersion and population difference in the steady state of an open ladder lasing without inversion ( lwi ) system are at first given when the phase fluctuation of the driving field is considered. then the effects of the driving field phase fluctuation on the gain, dispersion and population difference are analyzed by the numerical results from the analytical solutions. our research shows that the phase fluctuation of the driving field will results in a finite line width ; with the line width increasing, the gain decreases monotonously, however, variation of the dispersion isn ? t monotonous, it has a maximum value when the line width takes some value ; the line width varying can ? t lead to change lasing from without to with population inversion

    給出了有驅動場位相漲落的開放的梯型無粒子數反轉激光（ lwi ）系統增益、色散和布居數差的定態解析解，進而用得到的數值計算結果分析了驅動場位相漲落對增益、色散和布居數差的影響.研究結果表明，驅動場位相漲落將導致有限線寬;隨著線寬的增加，系統增益單調地減小，但系統色散的變化並不是單調的，當線寬取某個值時，色散有極大值;線寬的變化不能導致無反轉激光向反轉激光的轉變
  17. During the help - the - poor efforts in the past decade or so, poverty - stricken minority areas have enjoyed the preferential help - the - poor policy offered by the chinese government to other poverty - stricken areas, as well as a series of special policies formulated by the state : ( 1 ) expanding the sphere of aiding the minority areas

    在十多年的扶貧開發過程中，少數民族貧困地區除享受其他貧困地區扶貧開發的優惠政策外，還享受國家制定的一系列特殊政策: （一）放寬標準，擴大對少數民族地區的扶持范圍。
  18. By use of the morphological coefficients of estuarine riverbed and the relevant data of the north channel of the yangtze river estuary, the widening rate of the regulation line of the north deep - water channel of the yangtze river estuary is calculated, and the calculation result is in agreement with that of the fixed bed model test

    利用已有的河口河床形態系數及長江口北槽的有關數據，估算了長江口北槽深水航道治導線的放寬率，且與定床物理模型試驗值基本相符。
  19. This paper studies the design methods and techniques of the broadband lna. using negative feedback techniques and lossy match method, a broadband lna acceptable for sdr is presented. the measured results showed that over 30mhz ~ 3000mhz, the lna achieved a maximum noise figure of 2. 0db, a power gain of 22db with gain flatness of less than 2. 0db

    本文最後對寬帶低噪聲放大器的設計方法進行了詳細探討，並運用負反饋技術和有損匹配的方法，研製了一種適合軟體無線電應用的寬帶低噪聲放大器，經測試，在30 3000mhz頻率范圍內，噪聲系數nf 2 . 0db ，增益g = 22db 2 . 0db 。
  20. The structure and character of deformable mirror were analyzed, and the conflict between the deformation band and the pitch of deformable cells was pointed out. the " two - time compensation " wave - front correct mode was introduced to settle that conflict. the method for allocating wave - front aberration and designing static corrector was found, and the " two - time compensation " wave - front correct mode was validated by simulation

    分析了變形鏡的結構特點，初步給出了變形鏡本身驅動單元數與校正量之間的制約關系；引入「二次補償」波前校正方案，解決了變形鏡校正量有限與高功率固體激光系統波前誤差起伏量大的矛盾，建立了波前校正對象優化分配、靜態校正器優化設計等細節過程所需要的方法，通過模擬模擬驗證了「二次補償」波前校正方案對于降低變形鏡校正量要求和放寬光學元件加工精度的作用； 5
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