球形對稱 的英文怎麼說
中文拼音 [qiúxíngduìchèn]
球形對稱
英文
spherical symmetry-
In this paper, we give a brief introduction to the helfrich elastic theory. to solve the helfrich equation under the physical conditions of vesicles, a taylor series method is introduced, which offers a unified method to reproduce the exact solution including the famous axisymmetrical constant - curvature surfaces and the biconcave shape solution
本文在簡要介紹了helfrich的彈性理論及膜方程的基礎上，開創性地引入taylor級數法，在軸對稱膜的邊界條件下，對helfrich膜方程以taylor級數法求解，統一地得到了目前已知的兩個特解：常平均曲率曲面和紅血球形狀解。The simulation results suggest that, at the end of the scanning line, the dissymmetric temperature field and the great temperature gradient result in the balling phenomenon and great thermal stress, which could lead to the destruction of the sintering samples in this region. because of the coupling effect between scanning lines, the balling phenomenon is increased as the increase of the scanning lines, thus the over short scanning lines should be avoided in the sintering process. different scanning strategies have significant influence on the sintering
模擬結果表明，掃描端點溫度場的不對稱及較大的溫度梯度造成了端點球化現象，並在端點處產生較大的熱應力，使燒結成形試樣易在此處破壞;激光掃描線間的耦合作用使端點球化現象隨掃描線的增加而逐漸顯著，燒結時應避免過短的掃描線;不同掃描策略對燒結成形有很大影響，交替掃描會影響燒結試樣的質量，實際製造時應採用單向掃描策略。Implants for osteosynthesis - bone plates - specification for holes corresponding to screws with asymmetrical thread and spherical undersurfaces
骨接合術用外科植入物.第23部分:金屬接骨板.第3節:不對稱螺紋球形底面螺釘的螺釘孔Implants for osteosynthesis - bone screws and auxiliary equipment - specification for the mechanical requirements and test methods for screws having asymmetrical thread and spherical undersurface
骨接合術用外科植入物.第5部分:不對稱螺紋和球形下表面金屬接骨螺釘.第6節:機械要求和試驗方法規范In this article, starting from the biggest objective factor - the unipolar world order with the united sates standing out of all the other powers - and the biggest subjective factor - the traditional diplomatic thoughts of the united states, the author tries to analyze various disagreements and arguments about the united nations in america, especially between the whitehouse and the congress, so as to bring to light the reason why the united states ca n ' t have or implement a stable and clear - cut un policy. by trying to locate the united nations in the global hegemon strategy of the united states, the author put on exposure the essence of america ' s un policy : the united states is striving to lead and dominate the united nations and using it as a means to materialize its global hegemon dream
本文將從美國主導的一超多強單極格局這一最大的客觀因素和美國傳統的外交思想這一最大的主觀因素出發，通過剖析美國國內，尤其是行政部門和立法部門關于聯合國的種種分歧和爭論，探究美國難以形成和執行穩定鮮明的聯合國政策的原因，並通過分析美國的全球稱霸戰略與聯合國的關系，進一步揭露冷戰后美國對聯合國政策的本質，即在美國主導的單極世界格局裡，美國在參與、支持和改革聯合國的同時，力圖謀求控制和領導聯合國，把它當成其稱霸世界的工具。Based on the qps ionosphere model, the gradients model 、 quasi - cosine disturbed model and qps model with es layer are also introduced. then using the platform, the backscatter ionogram of these typical states are simulated, comparing with the real ionogram to find that they can match well, which proves the validity and practicability of the platform. the influence of the inputting parameters of these model and antenna patterns on the backscatter ionogram is also discussed in this paper
本文在球形對稱準拋物電離層模型基礎上，分別引入了梯度模型、準餘弦擾動模型、包含es層的準拋物模型，然後利用該模擬平臺，對這幾種典型電離層狀態的返回散射電離圖進行了模擬，並與實測圖進行了比較，一致性很好，證明了該模擬平臺的有效性和實用性。As regards to the spheric thin shell structure under external hydro static pressure, basing on flat - plate theory and by using basic von karman equations for large deflection, the equilibrium problem of axisymmetric bending of the spheric shell under uniform external pressure is simplified to an equilibrium problem of bending of elastic basic flat - plate and further converted into an equilibrium problem of beam on elastic fundation taking into consideration of the deformation characteristics
對球形薄殼結構隨靜水外壓的情況，應用平板理論中的vonkarman大撓度基本方程，將球形薄殼在均勻外壓下的軸對稱彎曲平衡問題簡化為彈性基礎平板的彎曲平衡問題，進而再根據變形特點將其轉化為彈性基礎梁的復雜彎曲平衡問題。Explicit iterated integral formulae of the moments in various order of the hitting times of geodesic spheres by brownian motions on rotationally symmetric manifolds are given in this paper
摘要主要給出了旋轉對稱流形上布朗運動關于測地球面的首中時、球殼的首出時的各階矩的迭代積分公式。Medico - surgical equipment. orthopaedic instruments. drills, taps and countersink cutters for use with osteosynthese screws with asymmetrical thread and spherical under - surfaces. material and dimensions
外科醫療器械.矯形外科器械.帶不對稱螺紋和球形下表面的骨縫術螺釘用鉆絲錐和沉頭鉆This paper discusses three slot - coupled microstrip antennas with high dielectric constants based on gps ( global positioning system ) receiving antenna. they are separately with slots of oblique, t shape, and l shape
本文以全球定位系統（ globalpositioningsystem ，簡稱gps ）接收機微帶天線單元為研究對象，探討了三種高介電常數縫隙加載正方形貼片的天線特性，分別是斜縫， t形縫和l形縫。First, the ray tracing equation and its numeric solution is presented in this paper, then on the base of quasi - parabolic ionosphere model, using the technology of the numeric ray tracing, a ray tracing simulateing platform is established. this platform can simulate the ray tracing for a fixed frequency or sweeping frequencies, also can calculate the group path and the covered region of rays
首先，本文給出了射線追蹤方程及其數值解法，在球形對稱準拋物模型背景電離層基礎上，利用數字射線追蹤方法，建立了射線軌跡演示平臺。該平臺可實現定頻或掃頻射線軌跡演示，計算各射線群路徑，覆蓋區域等功能。( 3 ) the most principal factors that influence the supersonic atomization process include the flow ratio of the gas - liquid metal ( gmr ) value, the flow of atomizing of gas and the range of the inverse vortex taper. the more of the value of three factors, the more advantage they are for the atomization and the more fine the powders are. ( 4 ) the produced powders are the best in efficient atomization efficiency, particle diameter, particle shape and dispersion when the solder alloy is zhl63a, atomizing medium is n2, the protrusion h = 6. 0mm, atomizing gas pressure p = 100mpa, over - heat temperature t = 167 ( t = 350 )
研究結果表明： （ 1 ）超音速霧化器的氣體流場在導液管下端形成一個倒渦流錐，在二維空間上呈軸對稱的雙峰分佈，負壓形成於這個倒渦流錐內； （ 2 ）修正後的霧化氣體速度公式可以滿足超音速霧化的要求； （ 3 ）影響超音速霧化工藝最根本的因素有氣液質量流率比（ gmr ）的大小、霧化氣體流量和倒渦流錐范圍，三個因素的值越大，對形成細粉越有利； （ 4 ）在焊錫合金為zhl63a ，霧化介質微n _ 2 ，導液管突出高度取h = 6 . 0mm ，霧化氣體壓力取p = 1 . 0mpa ，合金過熱度取t = 167 （ t = 350 ）時，所制得的粉末在有效霧化率、顆粒球形度、粒度及其離散度三個方面綜合性能最好。Incessant nuclear tests, unlimited industrial pollution so that mankind can continue to enjoy and be lazy, have worsen the condition of the dying earth. yet we are still patting ourselves in the back for coming up with silly inventions like flush - free toilets. we click our tongues in wonder at mutant fishes, but they could not awaken us to our ruthlessness and indifference towards the natural environment
不斷的核試炸，無止盡的工業污染，為了滿足人類的享受和惰性發展，奄奄一息的地球不斷病情加劇，人類卻還在為研究出上廁所不必抽水的無聊「發明」而沾沾自喜海洋中畸形魚的出現只是讓人咄咄稱奇，卻仍不足以喚醒人類對自然生態的無情和冷漠，當然也無法遏止人類對所謂文明科技的需索無度。In this paper, we use the main results of type 2 vdr to analyze the spherical symmetric distribution. we obtain the two equivalent representations of the spherical symmetric distribution. they are both a product of a positive random variable and a random vector with uniform distribution, and the domain of uniform distribution are both related with sphere
本文將第二類垂直密度表示的主要結論應用於球對稱分佈，得到了球對稱分佈的兩種等價表示形式，它們都是一個正隨機變量與一個均勻分佈向量的乘積的形式，且均勻分佈的區域都與球有關。For example, a single electron in an unexcited atom is pictured classically as a particle moving in a circular trajectory around the atomic nucleus, whereas in quantum mechanics it is described by a static, spherically symmetric wavefunction surrounding the nucleus
例如，單個電子在不活躍原子里被經典描述為粒子圍繞原子核圓形運動，但是在量子力學里它通過用靜止、圍繞核子的球對稱波函數來描述。This paper discussed two - pole permanent magnetic spherical motor, in which two poles of rotor are permanent magnets. the electro - magnetic relationship is analyzed and the electro - magnetic model has been developed, which includes voltage equations, flux linkage equations, and electro - magnetic torque expressions
本文研究了雙極永磁型球形電動機的電磁關系，將不對稱繞組折算為對稱繞組，建立了電機的電磁模型：電壓方程式、磁鏈方程式和電磁轉矩方程式。Radially symmetric deformation of a class of compressible hyper - elastic spherical shells
一類可壓縮的超彈性球殼的徑向對稱變形The use of wave packet to analyze the dynamics of quantum mechanical systems is an increasingly important method to the study of the classical - quantum correspondence. using the quantum gaussian wave packet analysis method, we calculate the autocorrelation function of the rectangular billiard, the peak positions of the autocorrelation function match well with the periods of the classical periodic orbits, which show that the period of the classical orbits can be produced by the time - dependent quantum wave packet method. we also discuss wave packet revivals and fractional revivals in the rectangular billiard, the results show that there are exact revival for all wave packet at each revival time. we find additional cases of exact revivals with short revival times for zero - momentum wave packets initially located at special symmetry point inside the billiard
利用波包分析量子力學體系的動力學行為在研究經典和量子的對應關系方面越來越成為一個非常重要的方法.利用高斯波包分析方法，我們計算了矩形彈子球體系的自關聯函數，自關聯函數的峰和經典周期軌道的周期符合的很好，這表明經典周期軌道的周期可以通過含時的量子波包方法產生.我們還討論了矩形彈子球的波包回歸和波包的部分回歸，計算結果表明在每一個回歸時間，波包出現精確的回歸.對于動量為零的波包，初始位置在彈子球內部的特殊對稱點處，出現一些時間比較短的附加的回歸Because the forces that are supposed to drive off mass from dying stars are spherically symmetrical, astronomers before the 1980s thought of planetary nebulae as expanding spherical bubbles [ see “ planetary nebulae, ” by martha and william liller ; scientific american, april 1963 ]
由於原本認為，從垂死恆星表面將質量載運出來的作用力具有球狀對稱性， 1980年代以前的天文學家，把行星狀星雲想像成膨脹的球形泡泡（請參見延伸閱讀1 ） 。The popol vuh, sacred to the mayans, unequivocally states, " men came from the stars, knowing everything, and they examined the four corners of the sky and the earth ' s round surface.
對于瑪雅人來說是神聖的，毫不含糊地聲稱： 「人類來自星星，知曉萬物，他們檢查天空的四隻角和地球的圓形表面。 」分享友人