preferred numbers 中文意思是什麼
preferred numbers
解釋
標準數目-
Preferred frequencies, frequency levels, and band numbers for acoustical measurements
聲學測量的優先選擇頻率頻率級和頻帶數 -
Schedule of preferred numbers for the resistance of resistors and the capacitance of capacitors for telecommunication equipment
電信設備用電阻器的電阻與電容器的電容優選數值表 -
Preferred numbers - series of preferred numbers
優先數和優先數系 -
Guide to the use of preferred numbers and of series of preferred numbers
優先數和優先數系的應用指南 -
The article below deals with the mechanism research of this kind of machine, describing the structure and principle ; theoretically analyzing the data to derive formula ; tentatively proposing theory of radial flow between parallel plates for future design ; pores arrangement, i. e., longitudinal pores are equally spaced, horizontal pores bore size is preferred unequal and rows distance can be either equal or not but generally smaller than pores distance, and rows shall be odd numbers and are arranged symmetrical from the center row and bore size reduces gradually from the center row
本文對氣墊機作了機理研究，描述了氣墊機的結構型式及工作原理，對氣墊機的主參數作了理論分析，根據平行平板間的徑向流動理論，建立了計算模型，導出了計算公式，可作為氣墊設計理論的依據；提出了氣孔布置的原則：縱向孔間距相等較好，橫向孔徑不等為佳，橫向孔排距可以相等，也可以不相等，但一般小於孔間距。氣孔排數應為奇數，由中心兩側呈對稱布置，孔徑由中心向兩旁逐漸減小。 -
Date of birth. travel preferences, such as preferred cities, datetime display preferences, flight seating and meal preferences, as well as others like frequent flyer numbers
旅遊喜好（如喜愛的城市） ，日期時間顯示選擇，機位及餐飲選擇，以及其他項目（如優惠飛行哩數等） 。 -
Prepared technical parameters were optimized by l9 ( 34 ) experiment analysis. a unique method for cleaning and drying of substrate - cleaning used by scour, drying used by infrared light was fished out by large numbers of experiment. chemical mechnism of zno thin film prepared by sol - gel technique was discussed by dta for the first time. by the measurements of sem, xrd and uvs, the thin film was analysed. the result proved that the thin film with strongly preferred orientation of c - axis perpendicular to the substrate surface which surface was homogenous, dense and crackfree was the crystalline phase of hexagonal wurtzite. the thin film was composed of plentiful asteroidal crystal which crystal dimension approximately 10 30nm. the average transmittance of thin film in visible region was above 90 %. the results of measurements else also proved that the thickness of single dip - coating was 75 240nm, this films resistivity was found to be 3. 105 102 3. 96 105 ? cm. the thickness and resistivity of thin film influenced by dope - content, withdrawal speed, pre - heat - treatment, anealing were reseached respectively
利用xrd 、 sem以及uvs光譜儀等分析方法對薄膜進行了研究，結果顯示，所制備的薄膜為六方纖鋅礦型結構，具有高c軸擇優取向性；表面均勻、緻密，薄膜材料由許多星狀晶粒組成，晶粒尺寸大約為10 - 30nm左右；薄膜可見光透過率平均可達90 % ；對薄膜厚度以及電學性能進行了測定后發現：單次鍍膜厚度約為75 - 240nm ， al ~ （ 3 + ）離子摻雜型氧化鋅薄膜的電阻率在3 . 015 102 - 3 . 96 103 ? cm范圍內；分別研究了摻雜濃度、提拉速度、預燒溫度、退火溫度等工藝參數對薄膜厚度和電阻率的影響。 -
Preferred numbers and series of preferred numbers ; basic values, calculated values, rounded values
基準數值和基準數值系列.基準數計算數圓整數 -
Guide to the choice of series of preferred numbers and of series containing more rounded values of preferred numbers
優先數和優先數化整值系列的選用指南 -
Basic standards. guide to the choice of series of preferred numbers and of series containing more rounded values of preferred numbers
基礎標準.優先數系列和多組優先數圓整值系列的選擇指南 -
Basic standards. preferred numbers
基礎標準.優先數
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