aperture loss 中文意思是什麼
aperture loss
解釋
孔經失真-
The position and size of the monochromator, focusing curvature radii and tilting angles of the germanium focusing monochromator under different different take - off angle, size and divergency of the second collimator and intensity loss due to the use of it were determined. the neutron flux at different wavelength, under different reflection and take - off angle of the monochromator and divergency of the first collimator, were given. the simulation on the aperture used for limiting beam size in front of the sample showed that, smaller the size of the aperture and further the distance from the aperture to the sample, greater the loss of the intensity and more serious the spread of the beam along vertical direction at the sample position which makes the practical sampling volume greater than expected
用蒙特卡羅模擬方法對中子應力衍射譜儀的設計方案進行了優化研究，提出了一系列可供參考的數據：確定了單色器的位置、尺寸、垂直聚焦單色器在不同起飛角下的聚焦曲率半徑和傾角；討論了第二準直器的尺寸和發散，以及使用第二準直器造成的強度損失；給出了在不同單色器反射面、起飛角、中子波長和第一準直器發散度的情況下樣品處的中子注量率，以及多種組合情況下譜儀的解析度曲線；對限束方孔的尺寸、距離樣品遠近對強度損失和測量中的影響做了深入研究。 -
( 4 ) through the hydraulic property experiment of micro - hole lateral pipes of simple sdi in air, it was found that the average pressure of 60 mitre length lateral pipes was at the position of per 40o / o ~ ~ ~ 50 % of the effectual pipe length from the fist micro - hole, major pressure - loss was occurred at the ahead part of half pipe. the pressure uniformity reduced with orifice aperture ? increasing, and the relationship between pressure uniformity and initial water pressure was poor. running under the initial water pressure of 1. 5 meter, the discharge uniformity reduced with orifice aperture ? increasing, and when the orifice aperture smaller than or equal 1. 0mm, irrigation uniformity could achieve above 0. 6
（ 3 ）通過對空氣介質中簡易地下滴灌的微孔毛管試驗研究發現： 60m管長的毛管平均壓力水頭的位置基本上在距第一孔口的有效管長40 - 45的地方；大部分水頭損失發生在毛管的前半部分；壓力均勻度隨孔徑的增大而減小，但與初始工作水頭關系不密切；在1 . 5m以下的工作壓力下運行，沿程出流均勻度隨孔徑的增大而降低，當孔徑不大於1 . 0mm時，灌水均勻度可以達到60以上；當孔徑大於等於1 . 2mm時，灌水均勻度低於50 。 -
After the introduction of the innovations and the improvements of foreign hydraulic shock absorbers, the profound cushion mechanics study is done aiming to the shock absorbers chosen for the thesis ; the cushion process of hydraulic shock absorbers can be divided into several stages, which include local pressure loss caused by across sectional area shrinking, sharp edge throttling and aperture throttling
在對國外新型液壓緩沖器的研究基礎上，針對本課題所選液壓緩沖器的結構特點，提出了分階段建立機理數學模型方法。將液壓緩沖器緩沖過程分為：由於流道斷面突然收縮引起的局部壓力損失階段，緩沖柱塞的邊緣和緩沖孔的邊緣形成銳緣節流階段，當緩沖柱塞進入緩沖孔中形成的縫隙節流階段等三過程。 -
Pcb manufacturer cooperating with our company has founded the factory for nearly 20 years, since our company becomes and keeps good cooperation with our company immediately, this factory possesses more than 20 layers of many plywood, multistage laser and buries the hole board production capacity blindly, very in enormous quantities processing line wide line from 3 mil 0. 075mm, high - accuracy pcb board of aperture 4 mil 0. 10mm, produce, can reach more than plywood more than 50000 square meters per month. our company many person responsible for, coordinate pcb engineers and technicians to produce matters engaged in pcb production management for many years, can deal with various project problems in pcb production process easily, strictly control the order assigning, finished pcb board of the craft to confirm and close, avoid customer s unnecessary cost input and loss effectively
與我司合作之pcb生產廠家建廠已近20年，自我司成立即與我司保持良好合作關系，該廠具備二十層以上多層板多級激光盲埋孔板生產能力，可大批量加工線寬線距3mil 0 . 075mm ，孔徑4mil 0 . 10mm的高精密pcb板，產能達每月多層板50000平米以上。我司多名負責協調pcb生產事宜的工程技術人員都曾從事pcb生產管理多年，可輕松處理pcb生產過程中各種工程問題，並嚴把工藝指令下達成品pcb板驗收關，有效避免客戶不必要的成本投入和損失。
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