frequency level 中文意思是什麼

frequency level 解釋
頻率級
  • frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
  • level : n 1 水平儀，水準儀；水準測量。2 水平線，水平面；水平狀態；平面，平地。3 水平，水準；水位；標準；...
  1. In designing analogic circuit, we adopt programmable filter max262 to meet the system ' s command. after the step, we can make the signal ' s frequency width is wider and noise level is lower. to make the signal ' s amplitude to meet the analogic to digital device ' s command, we adopt the max551 to finish the gain control

    在模擬電路部分，採用可編程濾波器max262 ，這樣就滿足了該數據採集裝置所採集的信號的頻率范圍較寬以及具有較低的噪聲水平的要求，為了使采樣到的信號的幅度滿足後面a d轉換器的要求，採用max551對采樣到的信號進行調理（增益控制） 。
  2. The results indicated that all isolates exhibited a susceptibility to amikacin and ceftriaxon, and 67 isolates showed a greater or lesser degree resistance to streptomycin, kanamycin, gentamicin, ampicillin, tetracycline, chloramphenicol, florfenical, cefotaxime, cephalothin and ceftiofur, to which 22 isolates exhibited a susceptibility. some isolates showed resistance to multiple antibiotics and displayed a highest level resistance to streptomycin with a frequency of 43. 8 %, followed by tetracycline with a frequency of 30. 3 %

    結果表明，所有分離菌株均對阿米卡星和頭孢曲松敏感； 67株對鏈黴素、卡那黴素、慶大黴素、氨芐西林、四環素、氯黴素、氟苯尼考、頭孢噻肟、頭孢噻吩、頭孢噻呋表現出不同程度的耐藥性，其中對鏈黴素的耐藥率最高，為43 . 8 ，其次為四環素（ 30 . 3 ） ，其餘22株為敏感菌株。
  3. This instrument can meter the electric level, frequency spectrum, carry to noise ratio, a / v, cobbly ratio, voltages of the ac trunk line and the battery. furthermore it can display the above information on the lcd and store them in the eprom

    該場強儀可以對有線電視系統的電平、頻譜、載噪比、 a v比、系統不平度、交流干線和電池電壓等進行測量，並通過液晶顯示，結果保存於eprom中。
  4. At. detail specification for cold welded seal quartz crystal units for oscillator applications - dk enclosure, 6. 0 to 25 mhz frequency range - fundamental thickness - shear mode, at - cut, for operation over wide temperature ranges non - temperature controlled - full assessment level

    振蕩器用冷焊密封石英晶體振子詳細規范. dp外殼6 . 0至25mhz頻率范圍.寬溫范圍
  5. At. detail specification for cold welded seal quartz crystal units for oscillator applications - dn, dq and dp enclosures, 17 to 75 mhz frequency range - third overtone thickness - shear mode, at - cut, for operation over narrow temperature ranges temperature controlled - full assessment level

    振蕩器用冷焊密封石英晶體振子詳細規范. dn dq和dp外殼17至75mhz頻率范圍.窄溫范圍
  6. At. detail specification for cold welded seal quartz crystal units for oscillator applications - dn, dq and dp enclosures, 50 to 125 mhz frequency range - fifth overtone thickness - shear mode, at - cut, for operation over wide temperature ranges non - temperature controlled - full assessment level

    振蕩器用冷焊密封石英晶體振子詳細規范. dn dq和dp外殼50至125mhz頻率規范.寬溫范圍
  7. At. detail specification for cold welded seal quartz crystal units for oscillator applications - dn, dq and dp enclosures, 50 to 125 mhz frequency range - fifth overtone thickness - shear mode, at - cut, for operation over narrow temperature ranges temperature controlled - full assessment level

    經質量評定的振蕩器用冷焊封石英晶體振子詳細規范. dn dq和dp外殼， 50至125mhz頻率規范.窄溫范圍
  8. At. detail specification for cold welded seal quartz crystal units for oscillator applications - dn, 47 u 2, dq and dp enclosures, 17 to 75 mhz frequency range - third overtone thickness - shear mode, at - cut, for operation over wide temperature ranges non - temperature controlled - full assessment level

    振蕩器用冷焊密封石英晶體振子詳細規范. dn 47u 2 dq和dp外殼17至75mhz頻率范圍.寬溫范圍
  9. At. detail specification for cold welded seal quartz crystal units for oscillator applications - dn, dq and dp enclosures, 0. 8 to 20 mhz and 3. 0 to 30 mhz frequency ranges - fundamental thickness - shear mode, at - cut, for operation over narrow temperature ranges temperature controlled - full assessment level

    振蕩器用冷焊密封石英晶體振子詳細規范. dn dq和dp外殼0 . 8至20mhz和3 . 0到30mhz頻率范圍.窄溫范圍
  10. On data level, it is firstly explored fusing signature data from sparse - band collocated radars to obtain wider band target frequency response. the most difficult problem which restricts the fusion process is the lack of mutual coherence between the various radar subbands

    在數據層，首先探索了對多個配置在同一地方的不同頻帶雷達測得的目標頻率響應進行融合，以獲取更寬頻帶目標頻率響應的方法。
  11. Abstract : this paper analyzes causal factors of flood in the middle reaches of changjiang river. due to neglection of environmental management, soil erosion in the upper and middle reaches of the changjiag river, lake sedimentation, large - scale reclamation of marshes, the flood regulation capacity of the lake was descended, and flood stage was risen and prolonged. consequently more and more river levees and lake dikes were reinforced almost every year to prevent the disasters, which made flood level go up and flood period last for more days. the frequency of flood and waterlogging disasters rose and their damage was enlarged. several proposals for flood prevention including agricultural modernization are put forward

    文摘: 1998年長江大洪水后開始實施的「平垸行洪，退田還湖」的土地利用調整方案，從長遠來說應尋求農業安全且收入逐漸提高條件下的土地利用，長江中游地區應積極推進農業現代化，提高農業勞動生產率，轉移，減少分蓄洪區的人口，移民建鎮，對區內的土地要促進其規模經營，由優秀的有文化的農民經營，平時只有少量的直接從事農業生產的經營管理人員，農忙時則大量地使用季節性合同工或實現機械化，大洪水時退田還湖，減輕長江幹流大洪水的壓力，減少分洪與特大洪災時的損失，這樣還可促進避洪、冬季農業等的發展，也有利於長江中上游地區陡坡耕地的退耕還林，還可在糧食充足時進行休耕，在旱災、糧食緊張時擴大糧食生產?
  12. The distance between the acoustic-emission source and the receiving transducer, and the background noise level are primary factors in selecting a particular frequency band.

    聲發射源與接收訊號傳感器間的距離以及環境噪聲的電平是選擇頻帶的主要依據。
  13. Verification regulation of high frequency standard level meter

    高頻標準零電平表檢定規程
  14. So it holds a ideal ability to anti - interference and has 2 scalar level resolution in location and measuring velocity than traditional radio induction technology. and the channel composed of the new radio induction system for communication is different from the parameter - constant channel and the traditional parameter - changing channel, its parameter is decided by the mutual induction between its antenna and induction - cable, by the location of its antenna, by the signal frequency passing through, its parameter has nothing to do with the time parameter. the channel composed of the new radio induction system is a new parameter - changing channel independently of time for communication

    而且，由新型無線感應系統組成的通道既不是恆參通道，也不是一般目前所知的變參通道，其通道傳遞函數的幅值只與信號的頻率有關，與系統中天線和感應電纜之間的互感和天線的位置有關，而與時間無關，其通道傳遞函數的相位只與天線的位置有關，而與時間無關，由新型無線感應系統組成的通道是一種不隨時間變化的新型變參通道。
  15. An under estimation of the hearing effects by the low frequency noise could be happened. that is to say, even if the a - weight sound level is small, the low frequency noise may annoy to listener by the different ways from the high frequency noise. so it is necessary to understand psychoacoustics in order to make noise quality evaluations that match the subjective experience of the purchaser

    同時應用主觀評價方法?成對比較法（ paircomparisonstatisticalevaluationmethods ）對不同家用空調器噪聲進行主觀評價試驗，並與客觀評價結果進行了對比，結果表明：人主觀響應（煩躁程度）與各心理聲學評價指標之間均具有很高的相關性，相關系數一般均大於0 . 9 ，而與a計權聲壓級之間的相關系數只有0 . 78 。
  16. Detail specification for multi - contact circular electrical connectors for d. c. and low frequency applications - bayonet coupling with front release, rear removable crimp contacts - full assessment level

    直流和低頻用多觸頭圓形電氣連接件詳細規范帶有前面可釋放後面可拆卸的壓接觸點卡口接頭.全面評估級
  17. Secondly, the wavelet transform of ae signals collected in experiment is carried out with db6 wavelet and scale 3 on the basis of the signal ' s frequency analysis. the high frequency d, signal is ae characteristic signal. and by choosing the level ' s wavelet coefficient as its input, the wavelet - neural networks can be trained with the data of ae experiment, and the ae signals can be effectively recognized

    然後，在實驗與對實驗所採集數據頻譜分析基礎上，根據對小波分析用於信號處理可行性研究，本文選擇db6母小波、尺度j = 3對實驗所採集數據信號進行小波變換，變換后其高頻成分d _ 1信號即為聲發射特徵信號。
  18. The general statistical results of the study indicated that chinese high school students in general employed a variety of learning strategies to study english at a medium frequency level. compensation strategy, metacognitive strategy and cognitive strategy received relatively higher level of usage, while memory, affective and social strategy were reported to be used less frequently. to find out whether there is any difference in strategy use among high, middle and low proficiency students, anova was employed to analyze the variance of learning strategies among groups of different proficiency

    在比較高中低分組策略運用和高考成績之間的關系時，我們發現高考成績高分、中分和低分組的學生在使用認知、補救、元認知、社會策略時有顯著差異，英語成績高的學生在使用這些策略的頻率上顯著高於低成績組的學生，而在記憶策略和情感策略的運用頻率雖無顯著差異，但也是高分組高於低分組。
  19. Flex frequency level expander

    頻率擴展器
  20. In fact, the whole planet was at a different frequency level

    實際上，整個地球在一個不同的頻率水平上。
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