輻條式 的英文怎麼說
中文拼音 [fútiáoshì]
輻條式
英文
spoke type-
Using the hulscher model of the formation of sand waves and sandbanks, under the ancient bathymetry, or under the modern bathymetry, the stokes number of the tidal flow and resistance parameter in the radial sandbanks satisfy the conditions for the formation of sandbanks. the research demonstrates that the dynamic flow conditions result in the development of tidal current sandbank. the radial sandbanks and it ' s asymmetrical distributions will still maintain in the future
應用hulscher沙波及沙脊增長模式，通過對該海域斯托克斯數及底部阻力參數的計算首次發現，南黃海輻射沙脊群海域在概化古地形和現代輻射狀沙脊群水下地形情況下，其斯托克斯數及底部阻力參數均滿足形成潮流沙脊的條件。The basic condition that produced superradiance and the radiation power were gotten
推導出產生超輻射機理的基本條件，並得到了微波輻射功率的解析表達式。Conclusions : these data may proide a rationale to explore clinical use of atra for the preention of radiation - induced lung fibrosis and other pathologic conditions inoling pulmonary fibrosis
結論：本研究資料為探索全反式維甲酸預防輻射和其他病理條件誘發肺纖維化的臨床應用提供了理論依據。Hub and spoke model
軸與輻條模式Based on the spectral irradiance measured with the sun - atmosphere ultraviolet spectrum radiometer ( sauvs ) developed by the institute of atmosphere physics and the changchun institute of optics and fine mechanics, chinese academy of sciences, measuring the direct and scatter irradiance spectrum of ultraviolet waveband which arrives in beijing global surface, giving a method of retrieving the aerosol optical depth ( aod ) and put up with primary results that exponential function can fit the retrieval results according to its visibility, putting forth different coefficients and functions on variable visibility, also giving a primary analysis on the aod in dust - storm day and some contrast between sun - day and dust - storm day, analyzing the ratio between scatter and total irradiance, and its relationship with atmosphere mass and total atmosphere optical depth, lastly contrasting with the survey results by aeronet beijing station, the results of retrieval is in reason, this work gives some help in researching the co - effect of aerosol - radiance - climate and makes preparation for further survey on the radiance characteristics of dust
利用中國科學院大氣物理研究所與長春光學精密機械研究所合作研製的太陽?大氣紫外光譜輻射計（ sauvs ） ，測量到達北京地表的太陽直接和散射紫外光譜輻射，導出了大氣氣溶膠的光學厚度。初步結果表明：北京紫外波段大氣氣溶膠的光學厚度在絕大部分情況下隨波長的增加而單調減小，用指數函數可以較好地擬合反演結果，統計得到了三個水平能見度狀況下擬合函數的系數值和公式表達式；初步分析了揚沙、浮塵、沙塵暴天氣條件下氣溶膠光學厚度的特點，並與一般晴朗天氣條件下的氣溶膠光學厚度特點做了比較分析；分析了太陽紫外譜輻射中散射輻射與大氣質量、大氣總光學厚度的定性關系和定量表達式；最後與全球氣溶膠監測網路（ aeronet ）北京站的資料做比對，表明反演結果基本合理。It is found that the fwm field can cause the asymmetry of electromagnetically induce transparency profile. in addition, the effect of different propagating orientations of probe field on the electromagnetically induced transparency is also discussed. in the molecular multi - level system with the perturbed superposition levels, we discuss the electromagnetically induced transparency, spontaneous emission enhancement, double dark resonance and double electromagnetically induced transparency by using the density matrix equation under weisskopf - winger approximation and dressed - state density matrix equation
針對實際的實驗條件，考慮了一種影響量子干涉的新的因素-四波混頻場，研究了四波混頻場對雙光子探測的-型能級體系的eit的影響，發現四波混頻場能夠導致雙光子探測的eit線型的不對稱，在此基礎上，討論了不同探測場的傳播方式對eit的影響，針對分子中實際存在的包含有微擾能級的不同多能級系統，我們分別採用綴飾態繪景下的密度矩陣方程和weisskopf - wigner近似下的密度矩陣方程詳細地討論了電磁感應透明、自發輻射的干涉相消和相長、雙暗態共振和雙電磁感應透明現象。The circular permanent - magnetic chuck can be classified as straight stripe fine ? pole type, ordinary pole type and radial pole type
圓形永磁吸盤按其結構可分為直條密極，普通極和輻射狀極等形式。The impedance matching criterion that the sum of all the radiating slot normalized conductances is equal to 2 for the inner feed, and also the sum of all the coupling slot normalized impedances for the series - shunt inner feeder is equal to 2 are verified by using microwave network theory
採用微波網路理論，在內部饋電情況下，分別對一條輻射波導上輻射裂縫的歸一化導納和為2的匹配設計準則，以及對串並形式饋電裝置，對耦合裂縫的歸一化阻抗和為2的匹配設計準則進行了證明。Properly drawn and woven into normal fabric, the mirrored fibers could lead to wearable radiation barriers, optical bar - code tags for clothing and flexible filters for telecommunications
在一般的纖維里適當混入光晶纖維，就能得出穿戴式的輻射屏蔽、衣服內的光學條碼標簽與柔韌的電訊過濾器。Based on the semi - vector wave equation under cylindrical coordinate system, the mode distribution and complex propagation constant in bent waveguides were computed by a finite difference method with perfectly matched layer ( pml ) boundary condition
摘要以柱坐標下的半矢量波動方程為基礎，採用基於完美匹配層（ pml ）邊界條件的有限差分方法，對彎曲波導進行模式求解，進而得到波導彎曲引起的輻射損耗。This technique combines the edge - based finite - element method with physical optics ( po ) and physical theory of diffraction ( ptd ). the hybrid technique is applied to compute the scattering fields from the electrically large bodies with cracks and cavities on their surfaces. it is also used to analyze the scattering characteristics of microstrip antennas residing in a cavity mounted on metal objects with finite sizes
本文採用edge - basedfem為基本方法，結合物理光學法（ po ） 、物理繞射理論（ ptd ） 、邊界積分方程（ bi ） 、區域分解技術（ ddm ）和完全匹配層（ pml ）吸收邊界條件等求解方法構成的混合方法，對電磁散射和輻射問題進行了研究，主要包括以下內容：提出了一種edge - basedfem與物理光學方法和物理繞射理論相結合的混合方法? fem po - ptd方法，並將該混合方法應用於帶有腔體或槽縫的電大尺寸導體目標的電磁散射特性分析和位於有限導體目標上的背腔式微帶貼片天線的電磁散射特性分析。Given the thermal physical parameters of the envelops and the weather data, the above two parameters are determined by the following system design parameters : radiant panel dimension, radiant panel location and radiant panel layout style ( center or peripheral ). based on the thermal net model, digital analysis of the energy consumption and thermal environment are carried out to the several representative spaces under different design parameters, through which the relations of the heating load to the design parameters are obtained and can be a reference in the practical system design
對于給定圍護結構熱物性參數和室外氣候參數的條件下，室內平均輻射溫度和室內空氣溫度的大小取決于系統的設計參數：輻射板的布置方式（周邊布置和中心布置） 、輻射板尺寸和輻射板鋪設位置。基於熱網模型，利用matlab軟體編程對採暖空間在不同設計參數下室內的熱環境和能耗進行數值分析，得出了低溫熱水地板輻射採暖系統的性能和能耗指標隨這些參數變化的規律，從而為低溫熱水地板輻射採暖系統的優化設計提供了參考。In this dissertation, the numerical computation for the acoustic radiation problem ( arp ) is studied deeply and systematically in the theory, method and the application technique, based on analyzing the situation of the home and abroad on the numerical computation for the acoustic radiation problem. the calculation formulas of the boundary element method ( bem ) for the exterior acoustic radiation problem in the full - space and half - space are deduced, based on the wave propagation theorem ; the arising of the non - unique solutions, which is associated with the application of the boundary integral equation ( bie ) in acoustic radiation problem, is analyzed and proofed ; the improved combined helmholtz integral equation formulation ( ichief ) is presented to overcome the non - uniqueness problem more effectively and reliably ; the determination of the singular integral coefficients on various occasions is analyzed ; the properties and treatments of the singular integrals with different orders axe studied ; the computation program of the cubic spline ichief is developed and its ability to overcome the non - uniqueness problem and feasibility to discrete the surface coarsely with the sufficient calculation precision are examined through examples
第二章在聲波動理論基礎上，詳細地推導出對應于無限域和半無限域的外部振動聲輻射問題的邊界積分方程計算公式；根據fredholm積分理論，對利用邊界積分方程計算振動聲輻射問題過程中解的非唯一性的產生進行了分析和證明；改進了chief法以提高其克服解的非唯一性的有效性和可靠性；對不同條件下奇性系數的計算、強奇性積分的收斂性及其在變量替換時與普通積分的差異性、不同階奇性積分的計算、數值求積分等進行了研究；開發了三次樣條改進chief法計算軟體，並通過算例考核了該方法在特徵波數處克服解的非唯一性的有效性和在保證計算精度的前提下實現剖分粗化以提高計算效率的可行性。The tidal current in the radial sandbanks area apparently has directional to - and - fro movement, which can be observed not only from tidal ellipses, but also from water particle traces. the calculated distribution of tidal velocity in this area shows that the average velocity is around 0. 6 to 1. 0 m / s
平面潮流橢圓、水質點跡線、潮流流速特徵研究表明，輻射狀沙脊群海域潮流具有明顯的定嚮往復流形式，平均潮流流速一般為0 . 6 1 . 0m s ，滿足形成潮流沙脊的水動力條件。The conformal microstrip antenna with some unique character has been applied in many fields, especialy on speedy objects. in this paper, an efficient fdtd algorithm is introduced to analyse the microstrip antenna. firstly, the fdtd formula in descartes coordinate system and in cylindrical coordinate system are obtained from the time _ dependent maxwell equations using the yee algorithm in a calculating region where the dielectric parameters are independent of time and space. the choice of the space discretization units and the time discretization interval are discussed which are decided by the accuracy and stability respectively. the shape and setup of the excitation source are discussed too. the excitation source is chosen to be gaussian pulse in shape. secondly, the mur ' s first - order and second - order boundary condition are deduced in cylindrical coordinate system. the methods of transforming radiation fields from near zone to far zone in the frequency domain and in the time domain are presented when fdtd is applied to analyse the characteristics of far zone. finally, three kinds of microstrip antennas are analysed. they are a slot antenna that lies on a plane ground of a microstrip, a slot antenna that lies on a cylindrical ground of a microstrip and a microstrip line _ fed aperture coupled stacked rectangular patch antenna in cylindrical coordinate system
本文從麥克斯韋旋度方程出發，建立了笛卡兒坐標下無源空間中均勻無耗媒質的fdtd基本方程和圓柱坐標下無源空間中均勻無耗媒質的fdtd基本方程，詳細討論了fdtd法計算中時間步長和空間步長的選取原則以及激勵源的類型和設置；推導了mur一階和二階邊界條件在圓柱坐標下的差分格式；給出了在用fdtd法計算天線的遠場輻射特性時必需採用的頻域和時域近場遠場變換技術；最後用fdtd法計算了平面微帶縫隙天線、柱面共形微帶縫隙天線和柱面共形微帶層疊天線的輸入阻抗和遠區輻射場，並分析了天線的一些參數的變化對天線輸入阻抗的影響，得出了一些有用的結論。The radiation problems of microstrip antennas residing in a cavity are analyzed by the edge - based fem with perfectly matched layer ( pml ) absorbing boundary condition ( abc )
將edge七asedfem與完全匹配層吸收邊界條件相結合，分析了背腔式微帶天線和背腔式分形微帶天線的電磁輻射特性。On the basis of the existing researches about the fully coupled thermal field and moisture movement in unsarurated loess soils, this paper gives the finite element module of thermal field after consideration of various natural elements such as wind speed, radiation, evaporation, and meanwhile put forwards the finite element module of moisture movement on saturated - unsaturated loess soils. furthermore, the paper also probes into the thermal and moisture transferring and coupled theory, and gives finite element module of fully coupled thermal field and moisture movement in unsarurated loess soils
在國內外有關非飽和土溫度場、水分遷移場及其耦合問題研究的基礎上，給出了考慮輻射、蒸發、風速等邊界條件的溫度場有限元方程，給出了計算飽和-非飽和土水分遷移場的有限元方程，對非飽和黃土中溫度場和水分遷移場傳輸機理及其耦合問題進行了初步的研究，給出了土體溫度場和水分遷移場之間耦合問題的有限元計算模式，分析了溫度和含水量之間的相互作用和影響。Abstract : have connected with ir target signature research, this paper deals with the principle and realization for the ir imaging terminal - guidance technology of an air - to - air missile in clutter backgrounds. the radiation signature of clutter earth backgrounds is analyzed, and the comprehensive analysis of the target ir radiation signature types of a military jet fighter as the mainly attacked target for air - to - air missile is gave. also we discusses the extraction and algorithm for target ir signature
文摘:本文結合對目標紅外特性的研究，論述了在復雜背景條件下空-空彈紅外成像末制導技術的原理和實現，分析了地面背景的輻射和散射的特徵;綜合分析了軍用噴氣式戰斗機作為主要被攻擊對象的紅外輻射特性，並給出了目標紅外特徵提取的多種方法和演算法According to thermal comfort theory, adopting radiation directly acting to human ' s body, people can also feel comfortable even if indoor air temperature is relatively higher in summer and relatively lower in winter than that of convection heat - supply which means that it is evident energy - saving as to the traditional convection heat transfer
根據熱舒適指標理論，採用輻射方式直接作用於人體，在室內空氣溫度較高（夏季供冷工況） 、較低（冬季供熱工況）的條件下，仍可以使人達到熱舒適，與傳統的對流傳熱方式相比具有明顯的節能性。A series of nerve endings forms a circular pattern of neural swellings in a hub - and - spoke arrangement just below the outer skin surface
皮膚表層之下，一連串的神經末梢以輪轂與輻條的排列方式，形成環狀的神經隆起。分享友人