逆平行結構 的英文怎麼說

中文拼音 [nìpínghángjiēgòu]
逆平行結構 英文
antiparallel beta structure
  • 逆 : Ⅰ形容詞1 （方向相反） contrary; counter 2 [數學] inverse; converse Ⅱ動詞1 （抵觸; 不順從） go aga...
  • 平 : Ⅰ形容詞1 （沒有高低凹凸 不頃斜） flat; level; even; smooth 2 （高度相同; 不相上下） on the same l...
  • 行 : 行Ⅰ名詞1 （行列） line; row 2 （排行） seniority among brothers and sisters:你行幾? 我行三。where...
  • 結 : 結動詞（長出果實或種子） bear （fruit）; form （seed）
  • 構 : Ⅰ動詞1 （構造; 組合） construct; form; compose 2 （結成） fabricate; make up 3 （建造; 架屋） bui...
  • 結構 : 1 （各組成部分的搭配形式） structure; composition; construction; formation; constitution; fabric;...
  1. A general stack equation of mobile robot based on analyzing the motion of planar motion object and the mathematical models of four different kinds of common wheels is developed, accordingly, the mobility of mobile robot is addressed and the forward and inverse solutions to speed for specific configuration driven by differential speed are derived. utilizing the muir and newman convention, the description of the posture transformation matrices between different coordinate frames and the solution for the speed of point located on these frames are introduced. according to posture estimation, a more accurate method, dead reckoning algorithm, is developed for a specified configuration characterized by differential speed motorization, and simulations of this algorithm and other traditional methods are carried out using matlab while traversing a circular path

    本文對兩輪差速驅動移動機器人的運動學及其本體緩沖設計進行了探討，在對平面運動物體運動分析的基礎上結合四種常用車輪的數學模型，推導出了一個通用的移動機器人堆積方程，在此基礎上分析了移動機器人的移動能力、並針對兩輪差速構型推導了速度正解與逆解；使用muir和newman的運動學建模方法，推導了移動機器人上點及連桿坐標系位姿、速度變換關系矩陣及求解方法；在移動機器人位姿識別方法中結合差速驅動構型對航位推演算法進行了分析：推導了一種理論精度較高的航位推算演算法，並使用matlab對其與傳統的推算演算法在跟蹤圓弧軌跡情況下進行了模擬；最後針對本文所研究的機器人給出了一種比較系統、可靠的緩沖結構設計思路，較好地解決了移動機器人作業過程中外界因素及本身設計中引入的各種不確定誤差問題；本論文研究成果已在本實驗室所開發的樣機上得到實現，經過應用與考核證明其中的分析與設計是切實可行的。
  2. Light microscopy was used to investigate the anatomy of 5 species of salt - enduring plants lived in the songnen plain. the result showed that humulus scandens ( lour. ) merr.,

    為了闡明耐鹽植物頡頏鹽逆境的解剖結構特徵，使用石蠟製片和光學顯微鏡技術對松嫩平原五種耐鹽植物進行結構植物學研究。
  3. This can fully consider the effect of the structure of transmission line and the selection of lighting parameter etc. by calculating and analyzing various of factor that affect the lightning tripping probability of 500kv double circuit transmission line, we can draw the conclusions : the result by intersecting method is more accord with the practicality circumstance than by existing standard methods, using unbalance high insulation and reverse sequence of wire can reduce the contemporary outage rate of double circuit line, reducing the footing resistance is one of the most efficiency method to reduce the back stroking rate of double circuit transmission line, the double back stroking rate and the single back stroking rate will fall by three ground wire, when the footing resistance is 10 ohm, the back stroking rate by three ground wire is 83 percent of by two ground wire

    在分析輸電線路繞擊耐雷性能時，對線路的雷電屏蔽問題進行了分析，提出對擊距法進行改進，充分考慮了風速的影響因素，編寫了具有工程實用價值的計算線路繞擊耐雷水平的程序，此方法可以充分考慮線路結構和雷電參數等對繞擊率的影響。通過對影響500kv同桿雙回線路雷擊跳閘率的各種因素進行了計算和分析，得到以下結論：採用相交法的計算結果比定義法更符合實際運行情況。採用不平衡高絕緣方式和導線逆相序排列可以大大降低雙回同時跳閘率。
  4. The asynchronous motor is widely used for its simple construction, ruggedness, high working reliability, relatively low cost, and high environmental adaptability. it is suit for the direction of high voltage, high speed and large capacity. vector control is its ideal speed modulation method. the harmonics of three - level inverter are less than the traditional two - level inverter ’ s, and it is convenient to realize high sinusoidal voltage output. the maximum voltage strength which each electric component bears is small, and it is easy for three - level inverter to realize large capacity. the research on the asynchronous motor vector control based on the three - level inverter is one novel work

    異步電機結構簡單、堅固耐用、運行可靠、成本低、環境適應性強，容易向高壓高速和大容量方向發展，獲得了廣泛應用，矢量控制為其理想的調速方法;三電平逆變器輸出端諧波少，有利於實現輸出電壓的正弦化，且單個開關管承受的最大電壓小，適合向高壓大容量方向發展。對基於三電平逆變器的異步電機調速系統開展矢量控制研究，是一件有意義的工作。
  5. This paper studies on used the ac servo system based on ti dsp ( lf2407a ) and the foc and digital signal processing thorem, achieves following results : algorithm. we employ svpwm ( space voltage pwm ) algorithm, improve the efficiency of the electric source, and decrease the harmonious elements. we build the mathematic model of the system and simulate it on matlab platform, dsigne segmented pid regulator to adapt variable speed and widen the speed range. measurement. the velocity and electric current measuring, we adopt multi - sampling - rate and digital filter principles. as more improvements we make, the whole system gets a good results. pc control. the complete controlling system can be controlled remotely. so we develop the pc controlling program.

    採用磁場定向脈寬調制演算法，提高了電源利用率，降低了逆變電壓的諧波，改善了電機的運行特性，降低了對電網的污染；在matlab平臺上建立了交流永磁同步伺服電機和電壓空間矢量脈寬調制控制系統的數學模型，在模擬的基礎上，對傳統pid調節器進行了改進，提出轉速調節器和電流調節器採用分段pid結構，根據給定轉速所處的區間，自動選擇相應pid調節器的參數，拓寬了調速范圍，提高了控制精度。
  6. In the twodimensional wind tunnel, systematic experimental researches were carried out on the phenomenon of reverse transition on a heated plane with stable density stratification

    針對加熱平板表面密度分層結構中的逆轉捩現象，在二元風洞中進行了系統的實驗研究。
  7. In this paper, the principle and method that making use of complex programmable logic devices ( cpld ) to realize high accurate pwm controller are chiefly analyzed, and a new control method and amendatory strategy for the triple multi - level convector based on cpld is put forward. by carefully analyzing the triple multi - level power amplifier composed of four bridges converter bridge, the fact and idea that complex programmable logic devices ( cpld ) have high speed

    本文詳細討論分析了用可編程邏輯器件cpld實現高精度pwm控制器的原理和方法，並且提出了一種基於cpld器件的三進制多電平逆變器的控制方法和改進策略，針對具有四級逆變橋結構的三進制多電平功率放大器進行了具體的分析和驗證，證實了可編程邏輯器件內部高速處理的性能和在電力電子技術控制中的應用優勢。
  8. Based on the above knowledge, the core components s - boxes of the rijndael algorithm and the camellia algorithm, which are the only nonlinear components, are analyzed and compared in detail. eight algebraic properties of s - boxes such as balanceness, strict avalanche criterion, differential uniformance, algebraic order, and so on are calculated and proved. the reason that the s - boxes which are constructed by the inverse operation on finite field has the specialty of 4 - difference is analyzed

    在此之後，本論文分針對rijndael和camellia演算法的核心部件，也是唯一的非線性部件s盒進行了詳細的分析和比較，計算並證明了s盒的平衡性、嚴格雪崩準則、差分均勻度、代數次數等八種代數性質，特別給出了通過有限域上的取逆運算構造的s盒其差分特性為4的原因，最後計算了兩個演算法s盒的兩種代數結構，表明rijndael和camellia演算法的s盒均具有良好的代數性質和復雜的代數結構，為今後兩種演算法在各個領域的應用提供了理論保障。
分享友人
分享到 Line

分享到臉書