复轴的

According to the biaxial reciprocating gear-driven principle that presents by professor He guo jin in this thesis, the biaxial reciprocating cylinder gear reducer has been designed and interiorinput power of this reducer is forty watt.

本文根据何国金教授提出的两平行轴间多级圆柱齿轮来复传动原理，设计了一台两平行轴大速比来复传动圆柱齿轮减速器，其输入功率为40w，这种减速器中的双联齿轮与轴之间为空套联接，双联齿轮所在的轴段只受弯矩，不受扭矩；也就是说，输入轴只有靠近电动机一端的20mm长度上受扭矩，输出轴只是在靠近外伸输出端与其键联接的齿轮和外伸端部之间承受扭矩，因此轴的扭转刚度高。

By spectral analysis of the system, we find that 0 is the uniquespectral point of system on the imaginary axis.

同时通过研究系统算子的谱特征，证明了系统算子的谱点均位于复平面的左半平面且虚轴上除0外无谱，进而得到系统的渐近稳定性，特别在范数意义下系统的动态解收敛到稳态解。

Secondly, a conjecture about the stability for these systems is proposed based on the sufficient and necessary condition of the isolated transfer function being positive real. When the zeros and poles of the transfer functions lie in the imaginary axis, a known conclusion is derived from the conjecture; while the zeros and poles are on the real axis, a new result is obtained and is proved in this note. Finally, according to the conjecture, an example with poles existing on the complex plane is presented, which is not only interesting but also challenging.

然后， 基于所有孤立部分传递函数都正实的充分必要条件给出了上述系统为稳定的一个猜想，当传递函数的零极点都位于虚轴上时，由这一猜想得到了一个已知的结论；当传递函数的零极点都位于实轴上时，由这一猜想得到了一个新的结论，本文证明该结论是正确的；最后，根据这一猜想，给出了传递函数极点位于复平面的一个例子，它涉及到一类系数矩阵为时变正定矩阵的振动方程的稳定性问题，值得去深入研究。

All backscattering field s intensity from conducting plate can be calculated by complex ray method ,especially complex ray paraxial approximation in angle domain through modeling the conducting plate.

本文通过建立导电平板反射场分析模型，利用复射线方法特别是角域中的复射线近轴近似方法，有效地实现了导电平板在整个后向范围内散射场的计算，同时计算精度可以由复射线展开参数ξ来加以控制。

According to the characteristic that the definition point of the Q matrix of wave front is always located on the extremum point on the axis of the beam, a three-dimensional formula for the rectificative factor of phase in complex ray paraxial approximation is proposed, which calculates the rectificative factor of phase directly without considering the calculation of the main directions and curvatures and the rotation of the coordinates, thus simplifying the paraxial approximation calculation by the complex ray expansion method.

根据波前Q矩阵的定义点总位于波束轴上极值点的特点，提出了三维复射线近轴近似相位校正因子计算公式。该公式不用考虑主方向和主曲率的计算和坐标旋转，直接计算相位校正因子，从而简化了复射线展开法的近轴近似计算。

Reduction of ovule number as a tendency of speciation in the genus is substantiated by the occurrence of tri_ovulate cones coupled with comprehensive characters of the genus. The metamorphic patterns as well as the leaf nature of the outer envelope indicate that female cones of Ephedra are compound while the female reproductive units of the ovulate cone have been reduced from secondary reproductive shoots similar to those of cordaites by phylogenetic transformation, fusion and reduction. Each fertile bract together with its axillary female reproductive unit composed the Bract Scale and Seed Scale Complex of Ephedra .

基于返祖性畸形三胚珠球花的出现及其他形态特征，认为麻黄属胚珠数目减少是该属内物种特化的一个趋势；利用雌球花发育的畸形现象及外珠被的形态学本质提出麻黄属的雌球果为复轴性构造，雌性生殖单位是由类似于科达类的次级生殖枝构造经系统发育变态、融合、简化成现存的生胚珠构造式样，每一可育苞片及其腋内雌性生殖单位共同组成了麻黄属的苞鳞_种鳞复合体。

Based on the Collins integral formula, the propagation of generalized hypergeometric beams in paraxial ABCD optical systems is studied and the analytical expressions for complex amplitude at output plane are obtained.

利用柯林积分公式研究了广义超几何光束在ABCD近轴光学系统中的传播行为，得到了光束在输出平面复振幅的解析表达式。

In the visual system, 5-HT/TPH-like immunoreactive neurons (ca.35 per hemisphere) were mainly situated between the optic lobe and lateral protocerebrum, the neurites of which either descended into the optic neuropils or ascended into the protocerebrum, thus possibly integrating the optic lobes and other brain regions.

TPH阳性神经元的类型、数目、分布位置、投射区域与5-HT基本相同。5-HT/TPH阳性神经元在视觉系统主要分布于视叶与侧前脑之间，每侧大约有35个，其轴突及分枝或下行进入视叶或上行进入前脑。5-HT/TPH阳性神经元在前脑分布于前脑背方、肯氏细胞两侧，大约有25个，轴突主要投射到蕈形体和中央复合体的广泛区域，另有个别神经元轴突下行投射进入视叶形成广泛分枝。

In the visual system, 5-HT/TPH-like immunoreactiveneurons (ca.35 per hemisphere) were mainly situated between the optic lobe and lateralprotocerebrum, the neurites of which either descended into the optic neuropils or ascendedinto the protocerebrum, thus possibly integrating the optic lobes and other brain regions. Inthe protocerebrum, 5-HT/TPH-like immunoreactive neurons (ca. 25) mainly distributed dorsalto the protocerebrum beside the Kenyon cells. Their axons directly projected into theprotocerebrum as well as the optic lobe.

TPH阳性神经元的类型、数目、分布位置、投射区域与5-HT基本相同。5-HT/TPH阳性神经元在视觉系统主要分布于视叶与侧前脑之间，每侧大约有35个，其轴突及分枝或下行进入视叶或上行进入前脑。5-HT/TPH阳性神经元在前脑分布于前脑背方、肯氏细胞两侧，大约有25个，轴突主要投射到蕈形体和中央复合体的广泛区域，另有个别神经元轴突下行投射进入视叶形成广泛分枝。

The propagation of elegant cosh-squared-Gaussian beams has been investigated and the analytic solutions have been obtained by means of an angular spectrum technique in uniaxially anisotropic crystals.

基于光束在单轴晶体中传输的角谱理论，对复宗量双曲余弦平方-高斯光束在单轴各向异性晶体中的传输作了研究，得到了一般的解析传输公式，并用数值的方法讨论了晶体内源于复宗量双曲余弦平方-高斯光束的两偏振分量的传输特性，结果表明，在适当参数的条件下，两偏振分量在晶体中的传输波形结构基本保持不变。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。