beam period 中文意思是什麼
beam period
解釋
搖桿擺動周期-
The theoretical expression of the critical angle is acquired, showing that it rises with the increase of the depth and period of modulation of refractive index. also, it increases as the beam width decreases
從理論上得到了該臨界角的表達式，它隨折射率調制周期、調制深度的增加而增大，且光束越窄臨界值越大。 -
Based on extensive investigation of construction technique history of chinese ancient buildings, the structure method, structure developing history and seismic behavior of chinese ancient timber structure buildings are analyzed in several respects of the structural system and form. through a series of experiments on constituent parts of chinese ancient timber building structure, including the tests on the corbels and brackets called dougong subjected to low cyclic reversed loadings, the tests on the wooden frame using the tenon - mortise joints as connections of column and beam subjected to low cyclic reversed loadings, the tests on vibration isolation effect of friction and slippage between column footing and their socle base, and a series of shaking table tests on a chinese ancient timber structure palace building mode under artificial earthquake at serving conditions, destroyed conditions and reinforced conditions, many valuable results of structures such as moment - curvature hysteretic loops of dougong structure and tenon - mortise joints under low cyckc reversed loadings, the static function, the seismic performance, energy dissipation, vibration reduction, energy - loss mechanism, nechanicalmode and failure mode were studied. aplenty of valuable parameters of the structure system were obtained, such as the natural period of structure, vibration modes, damping ratio, factor of vibration isolation, oscillate amplitude of ineitial accebration, velocity and displacement, magnitude of slippage, and the mechanism of structure failure and collapse etc. based on these research, the complete analysis of ancient timber structure under earthquake were carried out in which including mechanism analysis method, calculating mode, strength analysis of members and joints, strengthening methods for serving damaged ancient timber structure buildings were also taken into account
依照宋代《營造法式》建造了抬梁式殿堂木結構構件及結構模型，對中國古代木結構中的典型構造如：柱腳在礎石頂面平擱簡支、柱架榫卯連接、柱高不越間之廣、側腳、生起、斗拱等的構造機理及結構功能進行了量化分析和實驗研究： （一）通過木柱石礎靜摩擦試驗，測定了柱腳與石礎古鏡面間的摩擦系數及摩擦力隨上部結構荷載變化的規律； （二）通過單柱承載力試驗，測定了古建築中木柱的受力變形特徵、破壞模式、及模型材料的變形模量、極限承載力、極限變形等參量； （三）通過柱架低周反復荷載試驗，測定了柱架的抗側移剛度、柱架恢復力特性及滯回曲線、榫卯張角剛度及其變化規律、柱架及榫卯的極限承載力和極限變形、及榫卯減振參數； （四）通過斗?低周反復荷載試驗和受壓試驗，測定了古建築木構件與木構件間摩擦系數，斗?抗側移剛度，斗?恢復力特性及滯回曲線，斗?抗壓極限承載力及受力變形規律； （五）通過抬梁式殿堂間架模型振動臺試驗，測定了殿堂木構架結構自振周期，地震反應振形、阻尼特性及阻尼比；按結構分層特點對柱腳、柱頭和斗?層上的屋蓋的地震反應採用多點同步測量，對柱根滑移、榫卯變形、斗?的變形、復位、耗能減振參數等進行了定量分析。 -
By calculating large quantity of examples, this text studies earthquake resistant behavior of tapered portal frame with pined bases and analyzes its natural frequency, natural period of vibration and vibration mode. by comparing interior forces of pillar top, beam end and span midpoint in two conditions that seismic action effect participates combination of forces and not when portal frame is n ' t changed, ensure conditions that combination of seismic action effect has controlling f unction during tapered portal frame design, and tapered portal frame demands anti - earthquake design
本文通過大量算例分析，研究柱腳鉸接楔形變截面門式剛架的抗震性能，並對其自振頻率、振型進行了分析；通過比較地震作用效應參與荷載組合與不參與荷載組合兩種情況下，樑柱截面尺寸不變時，柱上端、梁端、跨中截面處的內力大小，確定在什麼情況下地震作用效應組合起控製作用，變截面門式剛架需要進行抗震設計。 -
Therefore, the three fundamentals required to obtain high precise measurements are : 1 ) frequency stability and frequency difference stability of the double - frequency laser source as well as the stable equivalent length of bore ; 2 ) the measuring beam and the reference beam are placed very co - axially ; 3 ) capability of recording the sub - division of the period of phase change and a reversible counter system
因而干涉儀系統達到高精度的基礎是：頻率及頻差穩定的雙頻激光源、穩定的等效腔長；測量光與參考光合光後有很高同軸度的光路結構；能可靠記錄相位差變化周期數的細分及可逆計數系統三部分。 -
The passed - joint hypo - beam as the first line of defence organization against horizontal force ineluctably bear most curves during the first period under the seismic force, which ca n ' t be balanced by the pre - stressing force of the pre - stressed hypo - beam, therefore, the first crack will occur on it ' s end and at last develop into the plastic - hinge
2 、通過本次試驗，並結合他人的一些研究成果，我們應該可以認為邊梁扭矩對節點的受力性能是有利的。彎、剪、扭的受力機制並不會使節點的抗震性能有明顯的降低。 -
Meanwhile, the rotational capability of the plastic hinge on the end of the passed - joint hypo - beam determine the capability of dissipation earthquake energy and occurrence of the process of internal force redistributing in the last period under earthquake force of the structure system in this test
3 .邊梁的抗扭性能和梁端「扭轉塑性鉸」的轉動性能對整個結構抗震性能的影響至關重要，因而在工程設計中應注意邊梁的抗扭設計 -
In view of the construction peculiarity of non - bracket construction trait of y - shape pier upper plate beam in goughexin road viaduct project, the author uses the beam - rod finite element to calculate the whole construction period by steps, compares the result with engineering practice, and finally proves, the calculation can offer reference for the construction and design of non - bracket upper plate beam
摘要針對共和新路高架橋y型墩上蓋梁無支架的施工特點，採用梁桿單元，對上蓋梁施工過程的各工況進行了分步計算，並與現場測試結果進行比較， ?上蓋梁無支架施工設計提供依據。 -
We give a brief theoretic analysis of using delayed self - controlling feedback to control beam halo. s ( the length of one period of focusing channel ) is selected as the delay parameter of the controller and the maximal lyapunov exponent is calculated
經分析，確定了延遲反饋控制器的延遲參數為s （一個聚焦磁場通道周期） ；而後，計算了系統的最大李雅普諾夫指數。 -
In recent years, developing completely along with high grade highway and stereoscopic transportation in cities, bridge development has entered the unprecedented high tide period. among them the box girder occupies important position in developments of the long - span pc beam bridge with its good section - form
公路及城市立體交通的全面發展，橋梁建設進入了前所未有的高潮時期，其中箱型梁以其優良的截面形式在大跨度pc梁橋建設中佔有極重要的地位。 -
The calculation model of the first period dead load is beam with simply supported ends ; the calculation model of the second period dead load is continuous beam on elastic support
第一期恆載，計算模型為簡支梁模型；第二期恆載以及活載，計算模型為彈性支承連續梁模型。 -
Centering at soft x - ray multilayer uniformity technology, we introduce general situation of multilayer, design of multilayer structure, simulation calculation, ion - beam sputtering deposition and evaluation of samples. above all, we carry out study of improving uniformity of period thickness spatial distribution, and develop correction mask for controlling period thickness. as a result, we improve uniformity from 4. 5 % to 2. 0 %, the error of period thickness on ( 130nm field is controlled within 0. 18nm, and the reflectivity reach 35 % at center wavelength 17. 1nm
特別地，我們設計並應用膜厚擋板補償技術控制多層膜的膜厚分佈，將膜厚分佈非均勻性從4 . 5減小到2 ，周期厚度絕對差值控制在0 . 18nm以內，並且制備得實際多層膜樣品在中心波長17 . 1nm處實測反射率達到35 ，達到實用水平。 -
By means of field monitoring the strain in beam slab of partial building floors of a typical super - length prestressed floor slab after a period of their prestressing, the variation of stress with the temperature at different monitoring locations was given
摘要通過對一典型超長預應力樓蓋的部分樓層梁板在施加預應力后一段時間內應變的現場監測，給出了不同位置測點應力和溫度的變化曲線。 -
The three level fortification criterion and two stage design method and the elastic response spectrum theory are adopted, and the program of nba ( the program of nonlinear - aseismic analysis for beam bridge ) is used to calculate. a lot of bridge design materials are gathered, through analyzing and calculating, the bridge and the lrb are related by the intrinsic period
本論文採用三水準設防、兩階段設計方法、彈性反應譜計算理論，採用橋梁結構非線性地震響應分析程序nba （ theprogramofnonlinear ? aseismicanalysisforbeambridge ）進行計算；通過收集大量的實橋設計資料，經分析計算，通過周期將橋梁與鉛銷橡膠支座聯系起來。 -
Porras and fu et al proposed that slowly varying envelope approximation and the complex amplitude envelope do n ' t fit anymore for the ultrashort pulsed beam shorter than or even near to one oscillation optical period, because they lead to a spatial singularity
結果表明，對于脈沖寬度較長（相對於一個光學周期）的超短無啁啾脈沖光束可以使用緩變包絡近似和復振幅包絡表達式。 -
The driver waits for the vertical retrace period the runtime will beam trace to prevent tearing
驅動程序需要等待垂直回描周期（運行庫將實施跟蹤以防止脫節） 。 -
3 ) planar gratings of germanium doped glass and sol - gel glass waveguides were written by means of uv beam, the period of the gratings is 535. 5 nm. 5
3 ）首次在鍺摻雜平面玻璃和鍺摻雜溶膠?凝膠玻璃波導上成功地寫入了平面bragg光柵，該光柵的周期均是535 . 5nm 。 -
In chapter three, the importance of maintaining the equal optical path between measuring beam and reference beam in measuring horizontal and vertical vibration table are analyzed, and the factors having effect on contrast degree of interference fringe are introduced. for improving the accuracy of laser - vibration - measuring - system, the phase - modulation - multi - period - average method and the vibration isolated of system are analyzed
第三章分析了光路設計中的等光程問題的重要性，以及影響干涉條紋對比度的相關因素；並從提高測量精度的角度分析了調相多周期平均法和系統的隔振。 -
Secondly, the push - over analysis is for the three - dimensional solid element model and the plane beam element model. the total shearing force - lateral displacement curve can be obtained from it. and then the total shearing force - lateral displacement curve is converted to pseudo acceleration - period curve and some comparisons are made between the pseudo acceleration - period curve and design response spectrum
然後，建立了有限元三維實體單元模型及平面桿單元模型，對其進行了push - over分析，並將所得的底部剪力一頂點位移曲線轉化為擬加速度一周期曲線，與規范反應譜進行對比，以此評定該體系的抗震能力。 -
Furthermore, the construction management of the fabrication and erection of the box beam is in complexity for the new workmanship, various procedures, and very special site conditions which should be taken into account so as to achieve the construction objectives in terms of safety, quality, progress respectively. with the various external affections, the working period was extremely tight for fabrication and erection of the box beam by the sixth company limited of fifth china railway group on the qinshen special passenger line, consequently, progress management became the
因諸多外界原因的影響，中鐵五局六公司在秦沈客運專線進行制梁和架梁施工中都遇到異常緊張的工期要求，施工進度管理成為其施工管理的關鍵，文中重點介紹的網路法組織箱梁製造施工和結合現場實際、分析施工工序、測定作業效率來控制架梁進度的方法對箱梁的製造與架設施工是極為有效的、科學的管理方法，對施工項目的各項管理都有借鑒意義。
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