port noise 中文意思是什麼
port noise
解釋
開孔噪聲-
Fluid noise mainly comes from out put pulsation of rate of flow, the main reason of out put pulsation of rate of flow is the instant high pressure return flow that obturation cubage produced when the big round curve pressure transition. the v trough on the port plate can reduce the fluid noise. in this paper, the author based on the acting of dam a river and condensability of liquid and used matlab language as tool to calculate the v trough on the original port plate and drew out the p - t diagrammatic curve and analyzed its shortcoming and improved the design of original v trough and got that the best size of its angle was 12. 3 and its length was 5mm and the cross section was an equilateral triangle
流體噪聲主要來源於輸出流量脈動，造成輸出流量脈動的主要原因是閉死容積在大圓弧段壓力切換時產生的瞬時高壓迴流，在配流盤上開設v型尖槽可降低因高壓迴流而引起的流體噪聲，本文以截流作用和液體的可壓縮性為理論依據，以matlab語言為工具，對原配流盤上的v型尖槽進行了理論計算，繪制出p - t圖線，分析了它的不足，並對原有v型尖槽進行了優化設計，得出了v型尖槽的最佳幾何尺寸：配流盤平面上的v型尖槽的兩邊的夾角為12 . 3 ，槽長5mm ，槽的橫截面為等邊三角形。 -
Qinhuangdao international hotel is a “ four - star ” sumptuous traveling hotel, which is located at the center of qinhuangdao city, close to the railway station in the north and qinhuangdao airport and port in the east. traffic is pretty convenient while no ciry noise. it s the ideal place to stay for business and traveling
秦皇島國際飯店是一家四星級豪華涉外飯店，地處秦皇島市中心，北臨火車站，東臨飛機場與客運碼頭，交通便利又無鬧市之喧囂，是商務和旅遊度假的理想下榻之處。 -
Three phase dry type power transformer, which make it with those features : safety, reliability, and energy saving, fireproof, flameproof, simple maintenance etc., the design is advanced ; the structure of products is reasonable and the outline is fine, the main performances of the products are much better than the national standards, for example, partial discharge level no - load loss, on - load loss, noise level, it is adaptable for application on heavy humidity and severely pollute places which are near to lake, sea and rive, as well as, high demand - fireproof, heavy load capacity place, such as : high building, airport, station, port, underground, hospital, electrical power station, metallurgy, shopping center, residential area and petroleum chemical industry, nuclear power station, nuclear - powered submarine
非包封線圈三相干式變壓器，具有安全可靠節能防火防爆維護簡單等優點。其設計先進結構合理外形美觀。主要性能指標均優于國內標準，如局放水平空載損耗負載損耗噪聲以及能適應高溫度環境使用等，可安裝在靠近湖海河邊污穢潮濕的環境及防火要求高負荷較大的地區，適用於高層建築機場車站碼頭地鐵醫院電廠冶金行業購物中心居民密集區以及石油化工核電站核潛艇等場所。 -
After analyzing the noise in the high frequency carrier channel and computing the parameter of channel, we solved the kernel problems of coupling and matched impedance. separate designing the power, power amplification, port, transceiver and other circuits, we fitted together all circuits become the whole lonworks node circuit, and then triumphantly debugged it
經過對高頻載波通道的干擾特性分析和線路參數的計算，解決了耦合和阻抗匹配等核心問題，並對電源、功放、介面、收發器等部分電路分別設計，最後形成了完整的lonworks節點硬體電路，並調試成功。 -
In this paper, the author improved the design of v trough of port plate by studying the automobile power steering pump ( apsp ) produced home and abroad and analyzing the different reasons of their noise from the stator transition curve, which could reduce the noise of apsp effectively
本文以國內和國外生產的汽車動力轉向泵為研究對象，從定子過渡曲線的角度分析了它們噪聲不同的原因，並對配流盤v形尖槽進行了優化設計，可以有效地降低汽車動力轉向泵的噪聲。 -
Adjustable signal levels, shielded housing, not to mention carefully selected components and a first - class signal - to - noise ratio together guarantee the perfect playback of your recordings. and the best thing about it : the phono preamp requires no additional drivers, no sound card and no external power supply. simply connect it to the your computer s usb port and start recording
它的外接式設計可完整的保護訊號並對抗失真，更不必打開計算機機殼進行安裝，只要透過phono preamp將唱盤與計算機連接起來，就這么簡單，也不用額外的驅動程序或電源，所有電源均來自usb埠。 -
This low noise amplifier and the 1. 5ghz 1. 8ghz low noise amplifier will work well in the environment under - 40oc, when the input port and the output port connect with open, short or 50 ? loads. both amplifiers achieve leading level in domestic
該低噪聲放大器和1 . 5ghz 1 . 8ghz的低噪聲放大器能夠保證- 40oc的環境溫度下，在輸入埠和輸出埠分別接短路器、開路器和50負載九種情況下保持穩定，而且其噪聲系數、增益等指標都已達到國內先進水平。 -
Further port development would mean more congestion, more air pollution, more noise pollution and more urban blight
繼續發展港口，將進一步惡化交通擠塞、空氣污染、噪音等問題，並破壞市容。
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