椭圆运动

Using Beltrami-Klein coordinate system, convexity and motion of ellipse in hyperbolic plane is considered.

在双曲平面中，利用Beltrami-Klein坐标系对椭圆的凸性和运动做出细致考察。

Lawrence martyr , 10 august : the monthly recurrence known as the new moon with the old moon in her arms : the posited influence of celestial on human bodies : the appearance of a star 1st magnitude of exceeding brilliancy dominating by night and day a new luminous sun generated by the collision and amalgamation in incandescence of two nonluminous exsuns about the period of the birth of william shakespeare over delta in the recumbent neversetting constellation of cassiopeia and of a star 2nd magnitude of similar origin but lesser brilliancy which had appeared in and disappeared from the constellation of the corona septentrionalis about the period of the birth of leopold bloom and of other stars of presumably similar origin which had effectively or presumably appeared in and disappeared from the constellation of andromeda about the period of the birth of stephen dedalus , and in and from the constellation of auriga some years after the birth and death of rudolph bloom , junior , and in and from other constellations some years before or after the birth or death of other persons : the attendant phenomena of eclipses , solar and lunar , from immersion to emersion , abatement of wind , transit of shadow , taciturnity of winged creatures , emergence of nocturnal or crepuscular animals , persistence of infernal light , obscurity of terrestrial waters , pallor of human beings

显示出不同程度之生命力的缤纷色彩白浅黄深红朱红银朱诸星之亮度一直包括到七等星以等级标志的诸星之大小诸星的位置御夫座沃尔辛厄姆路172大卫的战车173土星光环螺旋星云凝固后形成有卫星的恒星群两重大阳相互依存的旋转运动伽利略西蒙马里乌斯174皮亚175勒威耶赫歇耳加勒176等人各自独立地同时所做的发现波得和开普勒所尝试的距离的立方与回转次数的平方的体系化177多毛的众彗星178那几殆无限的被压缩性，以及自近日点至远日点那广漠的远心的重返大气层的椭圆轨道陨石的恒星之起源年纪较轻的天体观测者诞生的那个时期火星上所出现的"暗波"现象179每年在圣劳伦斯节殉教者，八月十日前后降落的陨石雨每月都发生的所谓"新月抱旧月"现象180关于天体对人体的影响的假定威廉莎士比亚出生的时期，在斜倚却永不没落的仙后座那三角形上端，一颗不分昼夜散发着极亮光彩的星辰一等星出现了181这是两个无光死灭了的太阳因相撞并汞合为白热体而形成的灿烂的新太阳大约在利奥波德布卢姆出生时，出现在七星花冠星座里而后又消失了的一颗同一起源亮度却稍逊的星宿二等星182还有约于斯蒂芬迪达勒斯出生时，出现在仙女座中之后又消失，小鲁道尔夫布卢姆出生与夭折数年后出现于御夫座后又消失，以及另外一些人出生或去世前前后后出现在许许多多其他星座中而又消失了的假定是同一起源的实际存在或假定存在的星斗183 。

The perturbed relative motion of satellite clusters on highly eccentric orbits makes orbit designers face a new challenge.

大椭圆轨道上卫星编队的相对运动特性及其所受摄动力的影响给编队轨道设计者提出了新的挑战。

Then with some special parameters selected,the equation of motion in the phase plane is obtained.

通过求解运动方程发现系统在时域的周期解为包含一类椭圆函数的反函数解析解。

By Visual Basic 6.0 program, taken the distance between hole 200mm and buried depth 120～150mm as the optimization goal, the most optimum parameters range of the mechanism was obtained as follows: the initial angle between planet frame and the line formed from spraying-fertilizer needle-tip and planet wheel axle was -45°～-40°, the initial angular displacement of planet frame was 40°～50°, the distance between spraying-fertilizer needle-tip and the planetary gear axle center was 280～300mm, simultaneously, the semi-major axis of elliptic gear was 29.364mm, the teeth quantity was 23, the ratio of semi-minor axes and semi-major axis was 0.958, the radius of circular gear was 25mm.

对该机构进行运动学分析，建立了数学模型，以穴距200mm和入土深度120～150mm为寻优目标，应用Visual Basic 6.0软件编程得出满足机构运动要求的最优参数范围为：喷肥针尖和行星轮轴连线与行星架的初始夹角-45°～-40°、行星架初始角位移40°～50°、喷肥针尖与行星轮轴心距离280～300mm，此时椭圆齿轮长半轴29.364mm、齿数23、短半轴与长半轴比0.958，正圆齿轮半径25mm。

The principal components of the vestibular system are the semicircular canals and the utricle and saccule.

半规管是主要的旋转运动感受器，椭圆囊和球囊内有听斑，其中含有耳石。

The undercutting analysis probe the position of undercutting line and the spherical angle of spherical gears. Teeth contact analysis probe the kinematic error and the position of contact point of spherical gears with misalignment and ideal case. Another contact pattern analysis probe the positions and size of contact pattern ofspherical gears.

齿面过切分析主要探讨球形齿轮之齿面过切位置及过切发生的球形角，接触分析则讨论球形齿轮分别在具有装配误差及理想状况时之运动误差及接触点位置，另外，齿印分析探讨球形齿轮在受力变形后其接触椭圆之位置及大小。

The various colours significant of various degrees of vitality (white, yellow, crimson, vermilion, cinnabar): their degrees of brilliancy: their magnitudes revealed up to and including the 7th: their positions: the waggoner's star: Walsingham way: the chariot of David: the annular cinctures of Saturn: the condensation of spiral nebulae into suns: the interdependent gyrations of double suns: the independent synchronous discoveries of Galileo, Simon Marius, Piazzi, Le Verrier, Herschel, Galle: the systematisations attempted by Bode and Kepler of cubes of distances and squares of times of revolution: the almost infinite compressibility of hirsute comets and their vast elliptical egressive and reentrant orbits from perihelion to aphelion: the sidereal origin of meteoric stones: the Libyan floods on Mars about the period of the birth of the younger astroscopist: the annual recurrence of meteoric showers about the period of the feast of S.

357显示出不同程度之生命力的缤纷色彩（白、浅黄、深红、朱红、银朱）；诸星之亮度；一直包括到七等星、以等级标志的诸星之大小；诸星的位置；御夫座；沃尔辛厄姆路；大卫的战车；土星光环；螺旋星云凝固后形成有卫星的恒星群；两重大阳相互依存的旋转运动；伽利略、西蒙。马里乌斯、皮亚齐、勒威耶、赫歇耳、加勒等人各自独立地同时所做的发现；波得和开普勒所尝试的距离的立方与回转次数的平方的体系化；多毛的众彗星那几殆无限的被压缩性，以及自近日点至远日点那广漠的远心的重返大气层的椭圆轨道；陨石的恒星之起源；年纪较轻的天体观测者诞生的那个时期火星上所出现的&暗波&现象；每年在圣劳伦斯节前后降落的陨石雨；每月都发生的所谓&新月抱旧月&现象；关于天体对人体的影响的假定；威廉。

If the reader will turn to the poem,"A Roxbury Garden", he will find in the first two sections an attempt to give the circular movement of a hoop bowling along the ground, and the up and down, elliptical curve of a flying shuttlecock.

如果读者谈谈诗，&阿罗克斯伯里园&，他会发现在头两节，试图给一个圆箍沿地面运动的保龄球和向上和向下，一飞毽椭圆曲线。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。