sinusoid 中文意思是什麼

sinusoid 解釋
n. 名詞 【數學】正弦曲線 （＝sine curve）。
adj. 形容詞 -al
  1. Purely spinal epidural cavernous hemangioma is a rare benign tumor composed of sinusoid vascular channels

    除非發生出血現象或侵犯到腦幹部位較易生成神經學癥狀。
  2. Experimental results certify that the proposed flyback inverter features small thd in the output sinusoid voltage, small size, light weight and fast dynamic response

    研製的100va原理樣機實驗結果表明，該逆變電路輸出正弦電壓失真度小，體積小，輸出動態及靜態性能良好。
  3. The paper researches rectangle, parabola, sinusoid and triangle acceleration curves and their response characteristics, and puts forward a concept of combined acceleration

    摘要研究了輸送機的各種加速度（矩形、拋物線形、正弦形和三角形）曲線及其響應特性，在此基礎上，提出了組合加速度的概念，並對其進行了研究。
  4. During the development of liver in alligator sinensis embryos, ss - ir cells appeared in a few of sinusoid endothelial cells on 8th day. 5 - ht - ir blood cells and tgf p 1 - ir blood cells were found in vein vessel from 30 - 55th day. egf - ir cells and sp - ir cells appeared in the outer membrane of liver from 40 - 55th day

    揚子鱷胚胎肝臟中，生長抑素免疫陽性細胞出現于孵育第8天肝血竇內皮細胞間；孵育第30 ? 55天，靜脈血管中發現5 ?羥色胺陽性血細胞和tgf 1陽性血細胞；表皮生長因子陽性細胞和p物質陽性細胞僅在第40 ? 55天出現于肝臟外被膜；甲胎蛋白免疫陽性細胞在第55天出現于肝臟外被膜及靠近外被膜的血管內皮。
  5. The dynamic response of the cam mechanism fan - out was found with the rule of sinusoid acceleration, and these establish the foundation of the design of the cam contour line, and provide a fire - new idea for the research of the mortar pump

    通過正弦加速度運動規律得到了凸輪機構輸出端的動態響應，為凸輪廓線的沒計-奠定了基礎，為砂漿泵的研究提供了嶄新的思路。
  6. A fast and accurate algorithm to estimate the frequency of a coherent pulse sinusoid is presented in chapter 3. it is based on the autocorrelation iterative method, and the simulation results show that for the lower snr, this algorithm can accord with the request of the soplat ’ s precision and less computational complexity. therefore, it ’ s a promising algorithm for practical application

    在對正弦脈沖信號的頻率估計中，第三章在總結、比較前人演算法的基礎上，選擇了基於自相關迭代的頻率精確估計演算法，並進行模擬分析，結果表明，該演算法在較低信噪比時，可以達到單站無源定位所要求的估計精度，且運算量小，具有廣闊的應用前景。
  7. The 500va experimental prototype of aero static inverter has the advantages of flat volt - ampere characteristic, small thd of output sinusoid voltage, high efficiency, small size, light weight and low cost

    500va輸出的航空靜止變流器樣機試驗結果表明，逆變電路輸出外特性平直，正弦電壓失真度小，變換效率高，體積小，成本低。
  8. Firstly, according to the characteristic that the doppler frequency shift signal can be approximated as a single sinusoid signal, the extended sinusoid signal retrieval ( pisarenko and esprit ) methods are presented and signal state and measurement formulations are developed, so the kalman filter recursive method is got. the brief introduction of low velocity moving target doppler frequency shift signal wigner - ville transformation and wavelet transformation expression are presented in this paper. secondly, because the clutter is gaussian distribution, cumement and high - order spectrum based methods are presented and the simulation results prove their good performance to suppress gaussian clutter in low velocity moving target doppler frequency shift signal processing

    一個方面是根據低速目標的多普勒信號可簡化為單一正弦波形式這一特點，得到了擴展的高斯色噪聲背景下的諧波恢復演算法，即高斯色噪聲中的pisarenko諧波恢復法和旋轉因子不變法（ esprit ） ；並推導了信號的狀態方程和觀測方程，進而得到基於卡爾曼濾波的遞推演算法對信號進行提取；本文還簡單的介紹了低速運動目標的多普勒頻移信號的wigner - ville變換與小波變換；另一個方面是針對雜波服從高斯分佈這一特點，提出了對接收信號求累積量和高階譜來對高斯雜波進行抑制。
  9. 3. making a deep research on weak sinusoid signal detection using duffing oscillators and combining chaos critical state detection method with general detection methods, this dissertation realizes weak sinusoid signal detection below - 50db snr. furthermore, starting from the analysis of the intermittent chaotic motion occurring in the detecting process, an array of duffing oscillators are used to estimate the frequency of weak sinusoid signals accurately

    （ 3 ）全面深入地研究了duffing振子用於微弱正弦信號檢測的機理，並把混沌臨界狀態檢測法和傳統檢測方法相結合，實現- 50db以下超低信噪比的微弱正弦信號檢測;建立了混沌振子陣列，實現低信噪比下正弦信號頻率的估計。
  10. The thesis mainly deals with the third part of across : " sompi " cepstrum methods. the principle and system structure of across a re first introduced. the propagation of wave in media is simply studied and its transfer function in frequency domain is modeled as superimposed damped exponential sinusoids, each damped exponential sinusoid is called as a wave element and its exponential index part consists of two factors : group velocity travel time and decayed factor

    為此，首先介紹了across的原理與組成和通過簡單地討論地震波在介質中的傳播情況建立起介質的傳遞函數模型，指出：在一個狹窄的頻率窗口裡，介質的傳遞函數可以用有限個阻尼正弦項的疊加的形式表示，每個阻尼正弦項代表一個波成分，其指數部分包括兩個因子：波成分在介質中的傳播時間和衰減因子。
  11. The method is limited when the conventional dft - based techniques are used in sinusoid detecting in the presence of strong signal and weak signal in noise

    摘要就被測信號的強弱差異對使用常規dft譜峰搜索的信號檢測影響，基於非監督的遞歸演算法，通過選擇適當的門限參數，提出了一種適合於強弱信號並存的多信號檢測方法。
  12. Based on the minimum potential energy principal, the influences of three loads, which are concentrated force, trapezoidal load and sinusoid load, over shear lag of cantilever single - box - single - cell box girder are deducted and discussed, and a conclusion is reached, which has some instructive significance for designer to determine the sectional dimension and reinforcing bars ; the bending normal stress changes greatly as considering the shear lag effect

    以最小勢能原理為基礎，推導並討論了3種形式的荷載：集中力、梯形荷載、正弦形荷載對懸臂單箱單室箱形梁剪力滯的影響，得出考慮剪力滯效應后彎曲法向應力有較大變化的結論，對設計人員確定截面尺寸、截面配筋具有一定的指導意義。
  13. The digital control of the full bridge inverter and the control strategy for outputting sinusoid current of inverters are mainly discussed. it presented a digital control method of digital pid for current control of single phase full bridge inverters through analyzing the mathematical model of inverters and its spwm method

    介紹了交流穩流源的基本設計原理和結構以及電壓型逆變器的spwm調壓方法，並在分析單相全橋逆變器數學模型的基礎上，在電壓型逆變器中實現控制輸出電流的數字pid控制方法。
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