曲率系數 的英文怎麼說
中文拼音 [qūlǜxìshǔ]
曲率系數
英文
buckling factor-
If the velocity of atoms is near to zero, the light for ces will tend to confine the atoms near to nodes and antinodes. the stability depends on the magnitude of the negative slope of the light force, the depth of the potential well and the momentum diffusion coefficient. it is important to select the parameters, e. g
如果通過激光冷卻能使原子速度降至很小甚至為零,光壓力的作用將使原子被較穩定地囚禁于激光駐波場的節點和反節點處,其穩定程度取決于該處光壓力曲線負斜率的大小、對應勢能的勢阱深度以及動量擴散系數的大小,因此,如何在實驗中合理選擇激光強度、失諧量等顯得尤為關鍵。This paper analyses the coupling wastage in columniform wave guide gas laser, and gives the function between the coupling wastage of laser guide modulo eh11 and the position and radius of reflector
摘要分析了圓柱形波導氣體激光器中的耦合損耗,給出了最低階波導模eh11的耦合損耗與反射鏡位置、曲率半徑的函數關系。The relation of radius of curvature and error as well as formulas of increasing parameters on condition of constant error are diverted. the equation of the line on the center of approximate circular arc is obtained , and it can avoids the trouble that numerical solution owns possibility of no convergence and simplifies node calculation of non - circular curve
導出了曲率半徑與逼近誤差之間的關系和等誤差條件下的參數遞推公式,建立了通過逼近圓弧圓心的直線方程和圓心坐標計算公式.按這種方法用圓弧逼近平面參數曲線,不需要求解非線性方程組,避免了計算可能不收斂的麻煩,簡化了非圓曲線的節點計算過程Based on the diopter status of myopia and hypermetropia, the paper presented the principle of excimer laser refractive surgery, the change of impacting cornea curvature on the cornea diopter. in this chapter, we also discussed excimer laser - corneal tissue interactions and photoablation. determine the relationship between the fluence of arf excimer laser and the cornea ablation rate, attain the relationship between the energy density and the ablation depth
研究了激光與生物組織相互作用、光蝕作用及準分子激光消融角膜的機理;首次定量研究193nm準分子激光高斯光束的切削量與能量密度的關系,計算單個激光脈沖角膜切削量;發現了角膜曲率對切削效果的影響,首次提出了角膜曲率半徑、切削位置與切削深度的關系;首次定量確定了激光光斑參數及其排列方式對術后角膜表面粗糙度的影響,為更精確實現角膜切削和提高切削后角膜表面光潔度、減少手術后角膜渾濁及角膜表面術后不規則提供了理論依據。The paper also does some deep research on the mesh characteristic of the mechanism, analyses the cause o f the cam profile error and index error during working, using object - oriented method, vc + + and pro / toolkit, performs second development to pro / engineer, completes entity proplasm of the cam mechanism using only few parameters, the press angle calculate module, error analysis module and curvature calculate module are built on the basis of it
然後通過對弧面分度凸輪加工中產生廓面誤差及工作時產生分度誤差原因的分析,建立了計算加工和分度誤差的數學模型。應用vc + +和pro toolkit對pro engineer進行二次開發,建立了弧面分度凸輪機構的參數化設計和三維造型及壓力角、誘導主曲率等運動特性和誤差分析軟體系統。Long focus object lens of three color achromatic aberration is one of two posers of optical design, using this method can get a perfect result. compared with pw method, the first results received from the wave - deviation method are more accurate and more rapid
使用此數學模型編的光學自動設計程序,也可以說是光學鏡頭設計的一種新方法,即實現自動選玻璃,求解初始結構(曲率半徑r ,厚度d等)和自動校正像差和優化系統等。Then a high - degree geometric continuity blending surface is obtained with transfinite interpolate method. ( e ) g3 blending surface with approximation can be constructed by lofting if geometric invariant errors are given, the surface can be converted to b - spline, nurbs form for the purpose of system aggregation
最後,為滿足曲面造型系統集成的需要,在保證曲率、曲率導數和撓率精度情況下,將上述研究結果應用於曲面放樣逼近方法,得到參數過渡曲面轉換成b樣條曲面或nurbs曲面的形式。It is important to analyze the stresses and reinforcement design of spherical shell with transnormal nozzle because it is widely used in petroleum > chemicak nuclear electric and other industries. first of all, in order to explore and master the characteristic of stress distribution on this structure and to find reinforcement design which can accommodate to different instances, the stresses of a series of models with different t / t and r / r were analyzed by the finite element procedure - ansys
首先,為了更進一步了解和掌握球殼超標開孔平齊接管結構的應力分佈特點,並找到適用於不同情況下的補強設計方法,本文利用ansys有限元分析計算程序對不同開孔率和不同厚度比的一系列球殼超標開孔平齊接管結構進行了應力分析,得到了應力分佈曲線和應力集中系數曲線。It has been shown that : with the increase of the kerr medium intensity parameter u, the rabi oscillation extent of the mean photon number decrease and the rabi oscillation frequency becomes rapid, the antibunching effect becomes strengthened ; with the increase of n, the interaction between the field and atoms gradually becomes weak, however, the interaction between the field and the kerr medium gradually becomes strengthened and happen in advance ; with the increase of the coupling constants of two atoms, the rabi oscillation extent of the mean photon number decrease and the rabi oscillation frequency becomes rapid too, the antibunching effect becomes weak
結果表明:隨著值的增加,光子統計演化曲線的rabi振蕩的幅度減小,振蕩頻率變快,系統的反聚束效應增強;隨著初始場強( ? )的增大,場與原子的相互作用逐漸減弱,而與介質的相互作用逐漸加強並提前發生。隨著原子間耦合系數g的增大,光子統計演化曲線的rabi振蕩的幅度減小且振蕩周期縮短,同時,系統的反聚束效應減弱。Results show that the influence of mainstream reynolds numbers on heat transfer coefficience is little and the heat transfer coefficience raise with the increase of reynolds numbers. the influence of the position of holes on heat transfer coefficience is complex and correlate with the mainstream speed and the balde surface curvature. and the influence of blowing ratio on heat transfer coefficience is more great ( especially to stator ), and show a complex relation to mainstream reynolds number and the position of holes
實驗結果表明,不同孔位出流的換熱由於孔排下游表面來流速度及葉片表面曲率的不同而有不同的規律,而主流雷諾數對葉片表面特別是壓力面和前緣區域的換熱系數比的影響較小,吹風比對換熱系數影響較大(特別是導葉) ,並且隨氣膜孔位置和來流雷諾數的變化而情況復雜。The equation for the quasi - continuous atom laser beam wave - function is given by schrodinger equation, the beam width, divergence curvature radius and quality factor were introduced to represent the atom laser beam whose transverse potential could be separated. for the conservative quality factor system in some direction, we can ge t the propagator of abcd formulation
本文在含時量子系統傳播子的abcd形式理論的基礎上,引入某一方向的束寬、發散角、曲率半徑和品質因子等光束傳輸參數來表徵橫向勢能滿足x和y分量相互獨立的原子激光的傳輸。This paper reviews the existing research methods for the water - yielding rules, presents the difference between the lab core and the real reservoir in macroscopic and microscopic geologic characteristics, integrated with the relative permeability curve and the methods for determination of the volumetric conformance efficiency of lab core and the real reservoir, and proposes a new method - conformance efficiency modification method that can be used to determine the theoretic water cut curve of the water drive oilfield
在總結現有產水規律研究方法的基礎上,從考慮室內巖心與實際油藏宏觀,微觀地質特性差異的角度出發,結合相對滲透率曲線以及實驗巖心、實際油藏體積波及系數的確定方法,提出並建立了一種確定水驅油田理論含水率曲線的新方法波及系數修正法。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。The results indicated that the dimension, shape and purity of base material could meet the functional demand of solid lubricant ; the thermal decomposition temperature of ptfe resin exceeds 400 c, but organic and inorganic packing filler added in ptfe made the water absorption rate of composite material increased, melting temperature and decomposition temperature decreased, in the meanwhile oxidative decomposition reaction was accompanied ; polar groups such as c = o, c - o - c and so on in the carbon fiber surface is advantageous to increase compatibility with other components and interlayer shearing strength ; uniform design experimental method could help to find the relationship between formula and frictional property by relatively small tests. the developing trend of each formula ' s friction coefficient could be showed by fitting curve ; the friction coefficient with no copper powder or graphite in formula was relatively big. this fact showed that copper powder and graphite should be used cooperatively ; it was found that when the ratio of copper powder to graphite by weight is 15 : 60, 30 : 30 - 40 and 60 : 15 - 30 respectively, the friction coefficient was relatively small. the degree of crystallinity of pure ptfe reached maximum by air cooling and the abrasion loss also reached maximum among three ones ; at the same time, the abrasion loss of solid lubricant sample was also the biggest among three ones ; when solid lubricant matched with 45 # steel axle or gcrl5 steel axle, lubricant transfer film could be formed on metal surface, thus direct contact between the surface of metal friction pair rings was reduced. their working life was elongated extremely ; there was mainly much graphite, a little ptff, moo3, feso4, cus and so on in lubricant transfer film
試驗結果表明:所選原料的尺寸、形狀及純度可滿足固體潤滑劑的性能要求;聚四氟乙烯樹脂熱分解溫度超過400 ,但在ptfe中加入無機填料會使復合材料吸水率提高,熔融溫度及分解溫度降低,且伴有氧化分解反應;碳纖維表面含有c = o及c - o - c等極性基團,有利於提高其與其它組分的相容性,提高層間剪切強度;均勻設計試驗方法能夠用較少的試驗次數找出配方與摩擦性能間的關系,擬合曲線基本能表示各配方的摩擦系數發展趨勢;配方中不加銅粉或不加石墨,其摩擦系數均較高,說明銅粉和石墨應該配合使用;當銅粉15份、石墨60份時,銅粉30份、石墨30 - 40份時,銅粉60 、石墨15 - 30份時,摩擦系數均具有較低值;純聚四氟乙烯樹脂在空氣冷卻時結晶度最大,磨損量也是三者中最大的;同時,固體潤滑劑試樣在空氣冷卻時的磨損量也是三者中最大的:不論是固體潤滑劑與45 #鋼軸配副或是固體潤滑劑鑲嵌入銅套后與gcr15鋼軸配副,在金屬表面均可形成潤滑轉移膜,從而減少金屬摩擦副表面間的直接接觸,大大延長其使用壽命;轉移膜中主要含有較多的石墨、少量聚四氟乙烯、 moo 。Through forming a framework of domestic rate of cost, the thesis has analyzed the competitive advantages from three levels, resource allocation efficiency of fresh fruits, latent competitive advantages and protective level and distorting degree from the government firstly. then, the thesis post - analyzed and examined the comparative advantages of china ' s apple and orange with tsc and kca. it consider that apple, orange, pear in china gave higher competitive advantages but the competitive advantage of fruits is decreasing in general, mandarin orange and golden orange ' s export competitiveness is stronger while aurantium, lemon and bitter orange have no export competitiveness at all
本文通過建立國內資源成本分析框架,應用國內資源成本分析法( drc ) 、社會效益分析法( nsp ) 、有效保護率法( erp ) ,從幾種鮮果生產的資源配置效率,潛在的比較優勢和政策保護水平以及扭曲程度3個層面對中國蘋果和柑橘的比較優勢進行了事前分析;然後運用凈出口指標(貿易專門化系數, tsc )分析法, 「顯性比較優勢系數」 ( rca )分析法對中國蘋果和柑橘的比較優勢進行事後分析和檢驗。Applying the basic theories of spatial data mining and geomorphology, taking the loess plateau of north shaanxi province, china as the research area, this dissertation explored the theories and systematic structures of geomorphologic data mining and acknowledge discovery from dems, ascertained the systematic structures of topographic factors and synthetic topographic acknowledge, as well as systemically summarized mining algorithms from dems. the author pa id more attention also to analyze the principle and algorithm of flow length, curvature, relief, the earth ' s surface incision and gully density. in this research, the elementary constitutes and mining algorithms of regional character acknowledge in the loess plateau were probed
本研究在廣泛總結前人研究成果與研究經驗的基礎上,利用空間數據挖掘和地形地貌學的基本理論,以陜北黃土高原多地貌類型區為實驗樣區,以1 10000比例尺dem為樣本數據,探討了dem中地形地貌數據挖掘與知識發現的理論方法和體系結構;確定了宏觀和微觀地形因子、地形綜合特徵知識的體系結構;系統總結了dem基本地形因子的提取演算法,並重點對坡長、曲率、地形的起伏度、切割深度和溝壑密度因子提取的原理與演算法作了深入的分析;提出了黃土高原地區區域特徵知識的基本構成及其系統完整、科學可行的挖掘提取演算法;擴充了arcviewgis軟體平臺中dem空間分析的基本功能;實現了以delphi7 . 0為平臺的地形信息輔助挖掘系統的設計與開發;完成了對黃土高原多地貌類型區(樣區)地形信息空間分異特徵的分析。Then some optimal models of water supply networks are enumerated and some factors which can influence the optimal results are analyzed such as the efficiency of pump station, the temporal value of fund, the curve of water consumption and the coefficient of water supply energy and so on
接著,列舉給水管網優化設計的數學模型,並分析影響目標函數優化結果的各種因素,例如泵站效率、資金時間效率、用水量變化曲線、供水能量變化系數等。Firstly, the pretreatment of character to be recognized is researched, stressed discussing the subdivisional process of character, and a kind of fast shape preserving morphological thinning algorithm is used. in the following, how to construct the structure model on the basis of characteristic point ) sub - stroke and their interrelation is discussed, and a kind of method that describe sub - stroke through the feature of the sequence of curvature is brought forward. finally, the paper adopts the recognising model of printing number that base on repository, and describes the constructing method of repository
文中首先對待識別字元的預處理進行了研究,著重探討了字元的細化過程,採用了一種基於數學形態學的保形的快速細化演算法;接著探討了如何以特徵點和子筆段及其相互關系為基礎構造結構模型,提出了一種以曲率序列性質描述子筆段的方法:最後採用了以知識庫為基礎的印刷體數字識別模型,並詳細地描述了知識庫的構造方法。The maximal load - carrying capability of the arch support is calculated by adopting mechanical model of curved beam based on its force analysis, and relationship between bearing capacity coefficient of small curvature arch support and radius and span of curved beam is gained based on supporting capacity comparison of curved beam and straight beam
採用曲梁模型進行了支架系統的受力分析,得到其最大承載能力;通過與直梁支架承載能力相比較,得到了小曲率拱型支架承載能力系數與曲梁跨度和半徑的影響關系。According to several boundary conditions, the frequency equation of flexural circular plate is calculated. similarly some coefficients in the displacement distribution can also be acquired, which provide a preparation for further study
在求得頻率的基礎上,進一步求解了與之對應的歸一化了的振形曲線系數,從而為後面的計算鋪平了道路。分享友人