negative modulation 中文意思是什麼

negative modulation 解釋
負調制
  • negative : adj 1 否定的 否認的；拒絕的 （opp affirmative）； 反對的 反面的；消極的。2 （opp positive） 【電...
  • modulation : n 調整，調節；（聲調的）抑揚，變化；【音樂】轉調，變調；【無線電】調制。 amplitude modulation 振...
  1. There has been a revolutionary advance in ultrashort pulse technology since the discovery of self - mode locking of ti : sapphire lasers. few - femtosecond pulses have already been generated from ti : sapphire lasers, by means of combining self - phase modulation with negative group velocity dispersion, which is similar to the way of soliton generation

    鈦寶石激光自鎖模的發現使得超短脈沖技術發生了革命性的變化，利用自相位調制和負群速度色散結合的類孤子產生方式，人們已經在鈦寶石鎖模激光器上得到了脈寬只有幾個飛秒的光脈沖。
  2. The second, at the high frequency primary coil, when switch turn on with control signal ( the spwm pulse is modulated ), in the positive or negative semi - period of low frequency modulation signal, transformer coil with same direction voltage. the magnetic flux of transformer core will increase step by step. at the end, it leads to magnetic flux saturation

    二、在高頻變壓器原邊，當開關管接收控制信號脈沖列（經調制的spwm波列）導通時，在低頻調制信號的正半周或負半周內，施加在變壓器繞組上的是同一方向的電壓，變壓器磁芯中的磁通可能將級進地逐漸增加，導致磁芯飽和，造成磁偏或單向磁化，導致低頻電信號放大失真或由於很大的磁化電流而無法正常工作。
  3. ( 5 ) the frequency modulation effects of positive ( negative ) dipole and positive ( negative ) unipole forcing source on lfo have the same sensitive region

    （ 5 ）正（負）偶極和正（負）單極對大氣的低頻振蕩調制有相同的敏感區。
  4. The electric power harmonic comprehensive control system with low cast and high security is applied in this article. it adopts that sourced compensation links with non - sourced compensation herewhich the former is realized by high frequency pwm control technology and the latter is carried out by crystal switch formed by non - flow and over - voltage. it can realize stepless modulation with imaginary power, mightiness compensation of harmonic and negative electricity, and circuitry consumption debasing are achieved

    提出採用有源補償與無源補償相結合的電力諧波綜合治理技術及裝置，無源部分採用無涌流和過電壓的晶閘管控制電容器技術實現，有源部分採用高頻pwm控制技術實現，成本低、可靠性高、可實現無功功率的無級調節、強力補償諧波電流和負序電流，降低線路損耗。
  5. ( 3 ) the frequency modulation effects of positive ( negative ) dipole or unipole forcing source on lfo in the mid - high latitudes are difference

    （ 3 ）正、負偶（單）極強迫源對中高緯大氣的低頻振蕩調製作用不同。
  6. ( 4 ) the frequency modulation effects of positive dipole ( unipole ) forcing source on lfo is stronger than negative dipole ( unipole ), and the wave oscillation quicken evidently

    （ 4 ）正偶（單）極強迫源對大氣低頻振蕩的調製作用強于負偶（單）極，波動振蕩明顯加快。
  7. They pointed out that modulation wave fronts ( such as those in the front of a light pulse ) in a negative index material are aligned the same way as they are in a positive index material ? anything else would violate basic causality and require parts of the wave to travel with infinite velocity

    他們指出在負折射率材料中調制波前（例如光脈沖前端的波前）的方向，與在正折射率材料中相同；若非如此，就會違反基本因果律，且部份波的前進速度將成為無限大。
  8. Based on the findings above, more conclusions are presented in the following : 1 ) adolescents have a lower, general evaluation on internet environment and they are not satisfied with it ; adolescents have positive behaviors rather than negative behaviors on internet ; adolescents have a higher self - evaluation on internet ; the commonly and frequently negative internet behaviors are cheating, legpulling and adventuring, etc ; the internet use motivations are chat on - line, amusement, information reception, correspondance, emotional modulation, etc. internet use only has a negative influence on a few numbers of the adolescents ;. 2 ) adolescents most frequently use chat on - line, which is sequently followed with amusement, general information browse, e - mail, etc. in addition, there is no gender significant difference between internet use and user ' s surfing time

    研究發現： 1 ）青少年對網際網路環境的總體評價較低；在網際網路中積極的行為多於消極的行為；對自我網際網路行為的評價高於對他人的行為評價；常見的消極網際網路行為依次是欺騙、惡作劇與冒險，且對他人構成的消極影響較小；網際網路使用動機依次是在線聊天、娛樂休閑、獲得信息、與親朋好友聯系和調節情緒；網際網路使用只對少數青少年個體造成負面影響； 2 ）青少年在網際網路上使用最多是在線聊天，其次為娛樂、聽音樂、看電影、一般的信息瀏覽、收發郵件和搜尋網上資源等。
  9. One new method that the uwb signal can be received ambiguously has been presented in this dissertation. furthermore, the sampling lfm signal becomes two sine signals with different frequencies based on two different delay processes. based on fft and remainder algorithm, the modulation rate and initial frequency of sub - sampling lfm signal are estimated precisely and unambiguously in negative snr

    該方法通過在數字域對信號進行兩路不同的延時和余數定理實現欠采樣條件下超寬帶線性調頻信號的調制斜率和初始頻率的無模糊估計，在不降低參數估計精度的前提下，解決了欠采樣方法引起硬體復雜度增加的問題。
  10. In addition, based on fft and remainder algorithm, the modulation rate and initial frequency of sub - sampling uwb lfm signal are estimated unambiguously in negative snr

    該方法通過fft和余數定理解頻率模糊，解決了負信噪比條件下超寬帶線性調頻信號調制斜率和初始頻率的估計問題。
分享友人
分享到 Line

分享到臉書