positive modulation 中文意思是什麼

positive modulation 解釋
電視的正調制
  • positive : adj 1 確實的，明確的；確定的；無條件的 （opp qualified implied inferential）; 絕對的，無疑問的，...
  • 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. 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。
  2. ( 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。
  3. ( 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。
  4. ( 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。
  5. 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。
  6. The proposed control system includes the attitude controller acting on the rigid hub, designed by using pulse - width pulse - frequency ( pwpf ) modulation integrated with command shaping technique based on csvs method, and the piezoelectric material elements as sensors / actuators bonded on the surface of the beam appendages, designed by the optimal positive position feedback ( oppf ) control technique, in which the selection of ppf gains is determined via introducing a cost function to be minimized by feedback gains which are subject to the stability criterion at the

    設計的控制器僅利用輸出信息，從而避免設計撓性模態狀態觀測器以及引入狀態觀測器誤差;在此基礎上，採用分力合成方法設計命令成形控制器來抑制撓性附件的振動，設計的優化命令成形控制信號在理論上可以對系統的各階撓性模態完全抑制。但考慮到模型不確定性和外部擾動，在內迴路又設計了最優正位置反饋（ oppf ）補償器以增加撓性結構的阻尼，使撓性結構的振動能夠很快衰減。
  7. 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。
  8. Passive measure include : filter, fielding, earthing, bypass, decoupling etc. positive measure have resonant switching modulation ( include soft switching modulation ), random switching modulation and chaotic switching modulation which be studied in this thesis

    從源頭上減小電磁干擾的方法有：各種諧振開關技術（包括軟開關技術） 、隨機開關調制技術、以及本文研究的混沌開關調制技術等。
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