thinning frequency 中文意思是什麼
thinning frequency
解釋
疏伐頻度-
This paper mainly discusses the designing and testing method to the dds acousto - optic mode locking. it also makes some further analysis on the critical technology - - - - - - the transducer acoustical membrane matching and transducer thinning, which can directly affect the performance of acousto - optic elements. it then analyses the heat effect of acousto - optic elements and the technology of transducer thinning by developing ion - beam sputtering of high frequency acousto - optic elements
本文重點討論了dds聲光鎖模器的設計及測試方法，討論和分析了影響聲光器件性能的關鍵工藝換能器聲學膜層匹配和換能器減薄工藝，對聲光器件的熱效應進行了測試分析，對離子刻蝕法聲光換能器減薄新工藝作了一定的探討。 -
The former one is a product of the pressure pulsation resulting from the fan blade periodically cutting the air, with the blade passing frequency as its base frequency and accompanied by higher harmonics. the wide - band turbulent noise is formed when the rotating fan forces the surrounding air to produce turbulent throw - outs and results in gas thickening and thinning processes
旋轉噪聲是由於風扇的葉片周期性地切割空氣，引起空氣的壓力脈動產生的，以葉片通過頻率為基頻，並伴有高次諧波。湍流噪聲是由於風扇運動導致的周圍空氣發生湍流脫體，使空氣發生擾動，形成氣體的壓縮與稀疏過程而形成的，是一個寬頻帶噪聲。 -
We have studied pretreatment of fingerprint images with experiments, including all the algorithm implementations of the normalization of fingerprint image, estimation of orientation and frequency field, fingerprint image enhancement, extraction of fingerprint ridges, and thinning of fingerprint ridges. the result can be accepted
本文對指紋預處理進行了實驗研究，編程實現了指紋圖像歸一化，指紋圖像方向場的計算，頻率的計算，指紋圖像的濾波增強，指紋圖像的紋線提取（二值化） ，紋線細化。 -
This paper studies the least redundant solutions of two - dimensional array system by using the simulated annealing algorithm. two ideal thinning solutions for the two - dimensional circle array were discussed intensively in this paper. one solution uses half - circle configuration with very much reduced number of elements and taking an image by rotating the array ; the other selects element positions around the full circle to provide a roughly uniform coverage in the spatial frequency domain
在一維天線陣設計的基礎上，本文利用模擬退火演算法給出了兩種最小冗餘二維圓環天線陣的結構設計方案，一種方案利用天線旋轉，在半圓周內稀疏天線；另一種方案通過將空間頻率采樣點的均勻分佈作為優化的約束條件，在全圓周上使天線單元分佈達到最優。 -
Thinning the crystal grain and increasing the center vent are effective approach to raise the limiting frequency of high permeability mnzn ferrite. through large quantities of experiments, we made progress in raising limiting frequency of high permeability mnzn ferrite. we prepared the broad band mnzn ferrite of which the initial permeability was 10000
通過採用上述實驗中的優化配方、添加劑組合以及制備工藝，我們在高磁導率材料的寬頻特性方面取得了很大的進展，研製出了起始磁導率磁導率為10000的寬頻mnzn鐵氧體材料，當頻率達到300khz時，起始磁導率下降不到20 % ，其性能相當于epcos公司改進的t38材料。
分享友人