reduction frequency 中文意思是什麼
reduction frequency
解釋
折算頻率-
( 2 ) gene flow frequency was reduced as distance from pollen donor increased and a dramatic reduction occurred at about 2 meters. the maximum distance where gene flow was not detected was 50 m for hybrid rice while it was 70 m for ms lines, with an exception that in one of the four ms lines it was detected a frequency of gene flow 2. 8 + 10 - 6 at 150 m for zhong 9a
在開花期主流風向ne的風速為0 . 2 ? 2 . 2m / sec的條件下， 2個雜交稻品種的最大漂流距離為40m ； 4個不育系的基因漂流基本上到60m為止， 70m處基因漂流頻率均降為0 ，僅中9a在150m處發現了1株basta抗性苗，經pcr檢測驗證為陽性。 -
Frequency domain model reduction method
頻域模型降價法 -
The good news, the editorial writers say, is that women in the placebo group experienced about a 30 percent reduction in seerity and frequency of symptoms during the 12 - month follow - up period
好消息是，社論作者說，安慰劑試驗組的婦女在12個月的隨訪期間，頻繁和嚴重的癥狀減少了30 。 -
A patch antenna with etched holes on the ground plane is also studied. the performance of the antenna at the resonant frequency is analyzed by using the fdtd method together with the pml boundary treatment. the results show that the surface waves are suppressed greatly, the bandwidth is improved and a 1 odb reduction on the sidelobe level is achieved at the 110 and 260 directions in the e plane
全面地研究了地面腐蝕周期圓孔結構的電磁晶體貼片天線在基波頻率處的性能，用fdtd方法並結合pml邊界處理技術對該天線所取得的研究結果顯示，本文設計的地面腐蝕型電磁晶體結構抑制了貼片天線中的表面波，增加了天線的帶寬，並有效地削弱了旁瓣，使天線的e面方向圖上110和260方向的兩個旁瓣被削弱了10db 。 -
The conclusions obtained as follows : firstly, the structure ' s free frequency is decreased by the reduction of the mechanical property of the material with the increasing temperature ; secondly the thermal stress produced by the temperature gradient may decrease or enlarge the structures natural frequency ; thirdly, the variety of natural frequency of the alloy structures effected by the heat effect apparently higher than that of the composite material structures
最後，採用ansys程序分析了合金材料、復合材料的板、彈體結構的熱振動特性。在不同的熱載條件下，取得以下結論：升溫導致的材料機械性能下降都會降低結構固有頻率，而溫度梯度產生的熱應力可能降低也可能提高結構的固有頻率；金屬材料結構的固有頻率受溫度的影響要比復合材料結構的固有頻率受溫度的影響要明顯。 -
The paper produces noise reduction measurements and major frequency coverage that is 200 ~ 2khz to be used in selection of acoustical absorption and sound insulation materials. the measurement produces self - contained data to design lower noise railway vehicles in the future
本次測試的車輛車內噪聲主頻帶為20 2khz ，可依據此頻段進行新型車的設計和車體內部隔聲吸聲材料的選擇。 -
Firstly, we find that both the quoted bid - ask spreads and depths decline dramatically in all twenty - five closed - end funds following the reduction in minimum tick size. we also find trade frequency increase. secondly, our analysis shows the reduction in minimum tick size cause an decrease in the variance of rice. finaly, we find that the minimum tick size influence the market efficency and the reduction in minimum tick size increase the market information efficency
研究結果表明：一，最小報價單位「分改厘」使上海證券交易所交易的25支封閉基金的買賣價差和報價深度明顯減小，而交易頻數增加：二，最小報價單位的減小降低了封閉式基金的價格波動性；三，最小報價單位的大小會影響市場效率， 「分改厘」提高了封閉式基金市場的信息效率。 -
With the rising demand ever, the orbital resource and frequency spectrum resource for gso communication satellite has been almost fully exploited and utilized, by means of cross polarization, multi coverage, and orbital space reduction
隨著通信需求的增長，人們採用極化復用、空間復用和縮小軌位間距等手段，對靜止衛星軌位和無線電頻譜資源作了接近極限的開發利用。 -
The research result demonstrates that along with the increment of reynolds number, the root mean square value of outer fluctuating magnitude of the external diameter in fall frequency band increases, the root mean square value of fluctuating magnitude of the external diameter in high frequency band decreses, demonstrating that the fluctuation of flexible pipe wall changes fluctuation don field of original rigid pipe, large - size eddy motion increases and small - size eddy motion decreases, this reduces energy loss and increases friction reduction effectiveness
研究結果表明：隨著雷諾數的增加，全頻帶的外徑脈動的均方根值加大，但高頻帶外徑脈動的均方根值減小，說明柔性管管壁脈動確實改變了原剛性管的脈動流場，大尺度渦的運動加劇，低尺度渦運動減弱，從而使得能量損失減少，減阻效果增大。 -
Simultaneously we append a high frequency amplifier in the high frequency sector, in order to recover the reduction of the gain in the new system
同時，在改進后雷達的高頻部分增加高頻放大器，以抵消天線改進后引起的增益下降。 -
If internet facilities enable or encourage people either to economise on the usage of money for example by netting payments due among two or more parties or by practising barter or to reduce the frequency of movements of money for example by leaving export receipts in an internet account in order to pay for imports, rather than repatriating them first, then there may be a prospect of a general reduction in transactions traffic in all currencies
倘若網上設施會促使或鼓勵人們減少使用貨幣例如消費時，通過兩家或更多機構支付帳款，或實行以物易物，又或是減少貨幣流動的頻密程度例如出口商把出口收益存放在售貨地的網上戶口，用以購買進口貨品，而不是一收到貨款即調匯回本國，則將來所有貨幣的交易流量都會普遍減少。 -
After analyzed the basic principle of optimized noise reduction on tyre pattern, summarized three approaches to noise reduction. the first is trying to reduce size of single block or socket to reduce noise amplitude on time domain, the second is to adjust stripes sorting order and their interlace value to avoid noise - made by every single block - peak values on time domain overlayed and the last is to adjust ratio of blocks and sockets, ratio of stripe interval and stripe sorting order to avoid noise periodical distribution and abnormal high peak values in some frequency strip
論文第四章分析了輪胎花紋優化降噪的基本原理，總結出三條降噪途徑：在允許范圍內盡量減小單個塊或槽的大小、刻刀槽軟化花紋塊來減小噪聲時域波幅度；調整節距排列順序、花紋條之間的錯位值，使各發聲單元發出的聲壓時域波形的同向峰值錯開，避免同向峰值疊加；調整花紋塊和槽比例、節距比例、節距排列順序，盡量避免周期性分佈，使輪胎所發出的噪聲趨于白噪化，避免某些頻段的異常高峰值。 -
Abstract : it is the first time to use powder damping technique in reducing the vibration and noise of cold saw clamp. through measurement and analysls of the noise reduction effects and frequency spectrum, it is found that powder damping is a simple and practical technique, and influences on the strength and natural characteristics of the clamp are small
文摘:把粉體阻尼技術首次用於冷鋸機夾盤的減振降噪，通過對其降噪效果及頻譜的測量分析，發現粉體阻尼不但是一種簡單實用的技術而且對夾盤的強度和固有特性影響小。 -
An algorithm of attribute frequency reduction based on discernibility matrix
基於可辨識矩陣的屬性頻率約簡演算法 -
Application of derrick high frequency fine screen in iron increase and silicon reduction
德瑞克高頻細篩在降硅提鐵中的應用 -
This paper presents an investigation on a new type of rubber damper, that is, a rubber damper with honeycomb structure. the honeycomb structure will enhance the energy dissipation of a rubber damper and as a result increase the damping of the damper. the performances of honeycomb dampers are experimentally tested by a test rig. the results show that the diameter and the density of holes of the honeycomb structure are important parameters in the design of the damper. for a damper of given size, there are optimum values of both parameters with which the damper provides highest damping. additionally the honeycomb structure does not change the correlation of damping to frequency. a practical honeycomb damper is designe d and applied to inlet pipe of a screw compressor in a petroleum factory for vibration reduction. the vibration of the pipe is obviously suppressed by the damper, at least 25 %
本文採用理論分析和實驗相結合的方法，研究了蜂窩孔這種結構因素對橡膠阻尼材料阻尼性能的影響。在自行設計、製作的懸臂式阻尼測試實驗裝置上，對蜂窩式橡膠阻尼器的阻尼性能進行了大量的實驗測試，初步找出了蜂窩孔孔徑、孔數以及預壓縮量等因素與阻尼器阻尼性能的關系。本文利用實驗研究的結論，設計了一種專用的蜂窩式橡膠阻尼器，並應用於某廠螺桿壓縮機進口管道的減振，取得了明顯的減振效果。 -
The result shows that average absorption coefficient and noise reduction coefficient separately equal to 0. 58 and 0. 60, and fine property of sound absorption at middle - low frequency
結果表明材料的平均吸聲系數和降噪系數分別達0 . 58和0 . 60 ，且材料的中低頻吸聲性能優良。 -
High - capacitance enables reduction of noise over a wide frequency range
高電容的特性所以適用於寬范圍的雜訊消除 -
This refinement may mean a reduction in the frequency of issues open to retail investors compared with the experimental period, but it will enable the allocation of a larger portion of the selected issues for allotment to them. it will also facilitate more focused retail marketing for the relevant issues
透過此項革新，開放予一般投資者參與的期數可能較試驗期少，但卻可使他們獲配售所選債券期數中的較大比重，亦可配合為有關期數的外匯基金債券進行更有效的市場推廣。 -
With the conduction property of the triggered thyristor and the intellective numerical controlled frequency reduction of the triggering pulse by mpu, we can divide alternating current into several complete sinusoidal waves to supply some loads. it can be made as a controller or a pcb ware, which is suitable for the air conditioning, machine tool and various instruments that require electric power or rotate speed adjustment
利用晶閘管的觸發導通特性，用單片機對觸發信號進行智能數字降頻，可在交流電中切分出部分完整的正弦波形供負載使用，可以單獨做成一臺控制儀器或者作為一個控制電路板用於需要電功率和轉速調節的空調、機床以及各類儀器設備中。
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