椭圆系统

The phase tracking principle of source-contained homodyne detection is researched, the frame diagram for phase detection and experimental results are given.

介绍了一种新型的光纤电压传感器结构和工作原理，分析了系统中椭圆芯双模光纤的传输模式和模间相干光斑的变化，采用熔接的方式进行相干光接收来获得正交相位漂移信号，根据模间群折射率差与光程差的关系设计调整光纤的长度，依据石英晶体和空气的绝缘强度进行传感光纤匝数设计，讨论了含源零差探测法的相位跟踪原理，给出了相位检测框架图及实验结果，分析表明该设计方案能达到相位跟踪的目的。

The chaotic attitude motion of an asymmetric satellite moving on a Keplerian orbit in the central gravitational field was discussed. The Hamiltonian function of the system can be expressed by using Serret-Andoyer variables.

基於土星卫星上所观察到的混沌运动，研究了中心引力场中Kepler椭圆轨道上非对称卫星的姿态运动，其系统的Hamilton函数可用Serret-Andoyer变量写出。

The synchronous satellite is used to support some small bussinesses in the time with low business amount which nonsynchronous satellite can not cover like late at night and small hours,thus to insure the requirement of satellite communication of China with low investment cost.

本发明公开了一种中国综合卫星通信系统，它是由同步卫星和若干个非同步卫星构成，所述的非同步卫星是由中轨卫星或椭圆轨道卫星星座组成，具有区域性和时限性，即非同步卫星采用只在每天业务高峰期覆盖我国的时限区域性星座，在非同步卫星不能覆盖的低业务量时段如深夜和凌晨，可由同步卫星来支持这些小的业务量。

With a comprehensive study on the development of ellipsometer both at home and abroad as well as an analysis of the problems undermining HST-1 ellipsometer such as low effeciency in measuring, poor precision and ISA, this paper applies the master-sercice framework with USB interface into the designing of a precise reflectional null ellipsometer according to the principles by which the null ellipsometer works.

摘要本文综述了椭偏仪的国内外发展状况，分析了原来HST-1型椭偏仪存在的问题，如测量速度慢、精度不高和ISA接口等，根据消光式椭偏测量原理，采用了USB接口的主从机系统框架，设计了一台高精度反射式消光法椭圆偏振测厚仪样机，并对该仪器进行了大量的测试，测试数据表明该仪器测量精确度高且速度快。

Volcan Copahue, an active stratovolcano which hosts an active hydrothermal system,sits on the southwestern rim of the elliptical Caviahue megacaldera.

博尔坎科帕韦积极的层状火山它承载了积极热液系统，就坐在椭圆Caviahue megacaldera西南边缘。

On the basis of analyzing the forming mechanism of elliptical head profile spinning a locus equation for the spinning process has been worked out. Then, proposed in a relatively systematic way is a method for the determination of the following: the parameters of the involute profile form plate for the control of a boiler head spinning, and the...

文中分析了椭圆封头仿形旋压成形机理，建立了旋压轨迹方程，较系统地提出了控制封头旋压的渐开线仿形模板参数及旋压道次间距序列的确定方法，并成功地进行了工艺试验，为回转体的仿形旋压控制参数的确定提供参考。

Superior steering system Use hydraulic steering,decreases the fatigue of the driver greatly;the steering has the advantage of low noise and little leak; Use sross cylinder steering axle,its front and rear connector use ellipse design,and the connection with chassis adopted a block ofshock,largely reduces the shock of the truck.

优良的转向系统采用全液压转向器转向中大大减少操作者的疲劳；采用的转向器噪音低，内泄漏小的优点：采用横置油缸转向桥，前后连接轴采用椭圆型设计，与车架连接采用减震块固定，由刚性连接变为柔性连接，减少了叉车的震动。

When it is under certain perturbation, a quasi-elliptic response with transmission zeros to improve the transition can be obtained using the transmission zero technique given in the dissertation. Further, a multi-mode resonator composed of a half wavelength resonator loaded with two shunt series LC circuit is also investigated intensive.

本文提出了一种新型准集总元件谐振器，它既具有结构紧凑的优点，又能够引入传输零点构成准椭圆特性响应；本文也提出了一种由半波长传输线加入微扰构成的双模谐振器，并对它的传输零点技术做了全面系统的研究，这种双模谐振器相比传统的环形双模谐振器有更加紧凑的尺寸；本文提出了一种由半波长传输线加载并联串联LC电路构成的多模谐振器并对其在宽带滤波器的应用进行了研究；论文对一种复合谐振器及其在双通带滤波器设计中的应用进行了研究。

The VCL method and the displacement method are used to calculate the Stress Intensity Factors of semi-elliptical surface crack at the root of pipe screws, on the basis of which a simplified calculating model for screws contact is put forward so as to analyse the fracture intensity for oil drill pipe screw coupling. For the semi-elliptical surface crack with different shape and deep ratio at the root of female and male screws and the corner of male flange, the SIF has been studied systemically under inter-pressure, tension, bend and torsion loads and the approximate formulas encluding the structure parameters of oil drill pipe screw coupling, deep ratio and the shape parameters of surface crack are developed.

对工程实际中的多种石油钻杆接头螺纹连接件，就公螺纹齿根、母螺纹齿根、公螺纹台阶转角处存在的不同形状、不同厚度比的半椭圆表面裂纹，在拉伸、内压、弯曲、扭转多种载荷作用下的应力强度因子作了系统研究，在大量有限元计算基础上，建立了包含接头结构参数、裂纹形状、厚度比在内的近似计算公式。

Because the radius is expressed with general norm, we can obtain several largest stable regions (such as parallelotopes, ellipsoides, polytopes el.) in parameter space.

由于这个半径是以欧氏空间的一般范数表示的，所以对于参数摄动范围是菱形、矩形、椭圆、对称多边形等情况，均可以利用它求出系统参数的最大允许摄动范围。

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。