digital approximation 中文意思是什麼

digital approximation 解釋
數值逼近
  • digital : adj. 1. 手指的；指狀的。2. 數字的，數據的。n. 1. （鋼琴等的）琴鍵。2. 手指。
  • approximation : n. 1. 接近；近似。2. 【數學】近似值。3. 概算，略計。
  1. This paper mainly focuses on the noise limiting by means of the direct sequence spread spectrum ( dsss ) and the analysis of the transmission performance of the plc and some digital modulation technology. the contents of the paper is as follows : 1 ) the technical feasibility is proved after simulating noise limiting principle of dsss by means of systemview, the simulation software ; 2 ) a kind of band pass filter ( bpf ) is realized according to the requirement of filter and the principle of butterworth approximation, which satisfies the index of performance of dsss. 3 ) the low voltage plc system includes the sc1128, the specific modulation / demodulation ic, the bpf filter and other circuit components, furthermore, the control function of system is realized by means of the personal computer and the microcontroller

    本課題在對低壓電力線的傳輸特性和數字調制技術進行分析的基礎上，將通信理論中的直接序列擴頻技術（ dsss ）用於解決低壓電力線通信的干擾問題，主要研究內容如下： （ 1 ）用通信模擬軟體systemview對dsss技術的通信和抗干擾原理進行模擬分析，分別對時域和頻域下採用dsss技術前後接收信號的頻譜進行分析，驗證dsss技術在本系統中的可行性； （ 2 ）由dsss技術對濾波系統的要求，根據濾波理論分析了巴特沃思型濾波器的逼近原理並設計了合適的濾波電路； （ 3 ）用調制解調晶元sc1128和自行設計的濾波器加之輔助外圍電路，構造出低壓電力線載波通信系統，並採用atmel公司的單片機設計了接收和發射電路的微控制器； （ 4 ）分別對採取抗干擾措施前後輸入和輸出信號進行對比實驗，並對結果進行分析，驗證了dsss技術對干擾信號的抑制作用。
  2. Manipulation of the pure time delay in digital control system applying pade approximation

    近似式處理數字控制系統中的純滯后
  3. Based on the fourier series digital approximation method, the optimal design of flat - top and high isolation pass band frequency response interleaver has been studied. at last a solution of high isolation ( > 45db )

    用傅立葉級數展開數值逼近的方法進行了高隔離度平頂通帶頻響全光纖奇偶交錯濾波器的優化設計，提出了隔離度大於45db通帶平坦濾波器的製作方案。
  4. Low power high precision successive approximation register analog to digital converter

    低功耗高精度逐次逼近型模數轉換器的設計
  5. Making full use of the correlated space information of multi - beam bathymetric data, the author put forward a method of gaussian surface approximation to build the grid net of regular digital terrain model ( dtm ) of surveyed seafloor, which is more accurate than other approximation methods

    本文充分利用了多波束數據的空間相關信息，提出了一種基於高斯地形曲面擬合的數字地理模型數據網格化方法，準確快速地得到標準等深線圖。
  6. It take advantages of processing digital in time. we confirm that the mainly controlled part is dsp finally, for realization and approximation needs, dsp used in the paper is programmed to actualize smart field communicatior on hart protocol

    確定由dsp來完成主要控制功能。最後，為滿足本課題所完成的功能和性能指標演算法需要，利用dsp來實現hart協議智能現場通信器的設計。
  7. But it has intrinsic defects such as low convergence and local minimum because the negative gradient method is adopted in weight adjusting. an improved rbf network is introduced which has the advantage in digital approximation, classification and learning rate and at the same time, the corresponding sensibility is also analysed

    但bp網路在用於函數逼近時，權值的調節採用的是負梯度下降法，這種調節方法有它的局限性，如收斂速度慢和容易陷入局部極小等缺點。
  8. Wavelet analysis have many advantages over discrete fourier transform by zoom - in and zoom - out capability. wavelet denoising in multi resolution approximation has been evolved to become very powerful tools for digital picture signal processing

    去噪處理已成為研究重點。小波多解析度逼近分析去噪已發展成為圖像處理的一個重要而有效的工具。
  9. The unconstrained and constrained linear matrix equations and related least squares ( l - s ) problems have been of interest for many applications, including particle physics and geology, control theory, the inverse sturm - liouville problem, inverse problems of vibration theory, digital image and signal processing, photogrammetry, finite elements and multidimensional approximation

    例如在粒子物理學和地質學， sturm - liouville逆問題，自動控制理論的逆問題，振動理論的逆問題，數碼影象和信號處理，航空投影測量學，有限元及多維逼近問題等方面都有重要的作用。
  10. Furthermore, various tools of nonlinear control design are introduced the paper is organized as follows : in the part one, we introduce a background and currant research situation of nonlinear sampled - data systems using digital controller designed on the base of the approximation and brief a main ide

    第六部分:問題的總結和展望，提出未解決的問題以及研究方向.在固定采樣間隔條件下，基於近似離散化模型上設計一的采樣控制器控制其連續
  11. The characteristics of vfc - type analog to digital converter ( atd ) and successive approximation analog to digital converter are analyzed. the paper disscuss the advantage of mcu integrated adc, select the data acquisition system of the design. 4. this paper utilizes the monolithic silicon integrated circuit performs switch monitoring and switch operation

    在開人、開出迴路設計方面，分析了傳統開人、開出的不足之處，提出了對開人、開出迴路進行改進的創新想法，設計了更為簡潔、可靠的開人、開出電路。
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