timing and weight 中文意思是什麼
timing and weight
解釋
時間控制與量感-
Based on the basic principle of wavelet analysis, multi - resolution analysis of signal in atomic clock is made. the coefficients of wavelet transform for synthesis atomic time, which are weighed and averaged at different wavelet scales, are obtained. then according to reconstruction theorem, multi - resolution synthesis time scale can be reconstructed. since the signal of atomic clock has been analysed by multi - resolution, we can use wavelet variance at different scales to weight and average the coefficients. thus either the difference in stability of different clock or the varying characteristic of the same clock at the different scale are all considered. finaly, this method is checked by the measured data from national timing serve center of shaanxi astronomy observatory. it confirmed that this technique, which is simple and practicable, is a new method of multi - resolution. from this method, the common characteristic of different clocks can be extracted. the stability of multi - resolution synthesis atomic time scale is obviously superior to that of other methods
本文根據小波分析的基本原理，對原子鐘信號進行多解析度分解，將分解后的小波變換系數進行加權平均，得到不同小波尺度綜合原子時的加權平均小波變換系數，然後由小波變換的重構條件，反演綜合時間尺度.由於對原子鐘信號進行了小波分解，利用不同尺度的小波變換系數的小波方差進行加權平均，這樣既考慮不同原子鐘在穩定性方面的差異，又顧及同一臺原子鐘在不同小波尺度的變化特性.最後根據陜西天文臺國家授時中心的實測數據對這種方法進行了檢驗.表明這是一種全新的多解析度綜合方法，這種方法比較簡單而切實可行，它能提取各個原子鐘的共同特性，多解析度綜合時間尺度的平穩性明顯優于其他方法 -
Secondly, the dissertation proposes a novel blind symbol - timing scheme for ofdm systems based on cyclostationarity feature of received symbols. the proposed schemes also exploits the periodicity of ofdm symbol introduced by cyclic prefix, by applying 2 - dimentional fourier transformation and choosing the appropriate correlation peak value as the symbol start location, the precision of this scheme is higher than previous conventional method. thirdly, the dissertation presents analysis with regard to channel estimation of ofdm systems. several interpolation algorithm in ofdm systems which based on pilot sequence have been analyzed in the first instance, and the influence of the channel noise on interpolation precision has discussed. the theoretic analysis and simulation results show that : the interpolation error induced by the precision of interpolation procedure itself has out weight
第三，論文在ofdm系統的通道估計方面，先對基於導頻的ofdm通道估計中的多種插值方法進行了分析，討論了噪聲對插值精度的影響，指出插值本身的精度所造成的插值誤差遠大於噪聲所帶來的插值誤差，從而階次更高的插值演算法在實用中並非最優的;並指出插值濾波法比變采樣率演算法對噪聲的影響更為敏感，在信噪比較高時插值濾波演算法比變采樣率演算法更優。 -
It has been playing an important role in equipping all kinds of arms and services for campaigns, tactical exercises and emergent actions etc. based on the detailed analysis of the exchange ' s architecture and implementing, this thesis points out some disadvantages of the device, such as too many absolute components, not very high enough reliability and security, very large size and weight, operating and maintaining difficultly. considering low power requirement and man - machine interface optimizing design at the same time, the thesis come up with an integrated design scheme to the previous device based on " mcu + cpld / fpga architecture " : ( 1 ) signal frequency dividing, timing frequency producing, 20 customers " led states controlling are implemented in cpld ; ( 2 ) decoding, latching data and controlling signals are implemented in cpld by bus interface between mcu and cpld ; ( 3 ) chip selecting principles and mcu idle mode design are completed under the consideration of low power requirement ; ( 4 ) operation by chinese lcd menus is adopted in the man - machine interface
本項目以該交換機為研究對象，在詳細分析原設備的系統結構和功能實現方式的基礎上，指出該機型在使用過程中存在技術相對陳舊、分立元件過多、可靠性和保密性不夠、體積大、重量大、維修困難等問題，同時結合系統的低功耗需求和優化人機介面設計，本文提出基於「單片機+ cpld fpga體系結構」的集成化設計方案：在cpld中實現信號音分頻和計時頻率生成電路、 20路用戶led狀態控制電路； cpld與單片機以總線介面方式實現譯碼、數據和控制信號鎖存功能的vhdl設計；基於低功耗設計的器件選型方案和單片機待機模式設計；人機介面的lcd菜單操作方式。 -
A person with overactive bladder also can modify certain behaviors, including timing and regulating fluid intake, reducing caffeine and alcohol, losing weight and quitting smoking
尿頻的患者也需要改變一些特殊的生活習慣，包括定時的有規律的飲水、少喝咖啡和酒精飲料、減肥以及戒煙等。 -
The design on a kind auto - weight and packing machine by three - step timing
一種三級控制自動定量包裝機的設計
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