查询词典 section boss

The ratio of the distance of any point on a conic section from a focus to its distance from the corresponding directrix. This ratio is constant for any particular conic section.

离心率二次曲线上任何一点到焦点的距离与到准线的距离之比对任一特定二次曲线来说，这个比值都是一个常数

In view of the fact that the complicated power electronic and electric machine system has multiple nonlineerand simulating tests are difficult and costly, the paper analyzes the configuration of the complicated power electronic and electric machine system, studies the model and simulation methods of each section and according to its section complexity, proposes the method of the modeling and simulation method of modeling separately and simulating connectedly to combine the circuit simulation method with the system simulation method.

针对复杂的电力电子电机系统通常具有多个非线性环节，且实验模拟测试困难费用昂贵等问题，采用仿真方法，通过分析复杂电力电子电机系统的结构，并根据其结构特点，研究了其各组成部分的建模与仿真方法，提出了根据各子系统复杂程度单独建模、再从系统角度把电路仿真和系统仿真结合起来联合仿真的仿真研究方法。

Transactions which require agency approval under section 1843 of Title 12 or section 1464 of Title 12, if copies of all information and documentary material filed with any such agency are contemporaneously filed with the Federal Trade Commission and the Assistant Attorney General at least 30 days prior to consummation of the proposed transaction

经下列机构批准的交易，提供给上述机构的所有信息和文件性证据，副本要同时在上述交易完成前的30天送交联邦贸易委员会和司法部长助理。1956年银行控股法第4节；全国住宅法第403节或408节，或1933年住宅所有者贷款法案第5节规定的机构。

Furthermore, the first-order optimality condition and its equivalent reformulations for generalized semi-infinite max-min programming with a non-compact set are presented using the lower-Hadamard directional derivative and subdifferential.2. Chapter 3 studies the gradient-type methods for unconstrained optimization problems. Section 1 proposes a new class of three-term memory gradient methods. The global convergence property of the method is established. Furthermore, in order to improve the convergence property of the method, a new class of memory gradient projection methods is presented with the property that the whole sequence of iterates converges to a solution to the problem under the conditions such as pseudo-convexity and continuous differentiability of objective function. In section 2, two new classes of methods, called gradient-type method with perturbations and hybrid projection method with perturbations, are proposed. In these methods, non-monotone line search technique is employed, which makes them easily executed in computer.

第3章研究了无约束优化问题的梯度型算法，第1节提出了一类新的三项记忆梯度算法，讨论了算法的全局收敛性，进一步提出了一类新的具有更好收敛性质的记忆梯度投影算法，并证明了该算法在函数伪凸的情况下具有整体收敛性，第2节在非单调步长搜索下提出了带扰动项的梯度型算法及其混合投影算法，这两类算法的一个重要特征就是步长采用线搜索确定而不象许多文献中那样要求步长趋于零，这样更容易在计算机上实现，在较弱的条件下证明了这些算法的全局收敛性，数值算例表明了算法的有效性。

Pollens of Polygonum convolvulus P. multiflorum P. cuspidatum were examined by transmission electron microscope and technique of ultrathin section. The results of thin section indicate pollens of P.

为此，本文以花粉壁的内部结构为重点，用透射电镜的薄切片技术，对广义蓼属蔓蓼组的4种植物花粉外壁构造的特点进行了观察和研究。

According to the comparative discovery with the value of theory and experiment: When the cross section ratio is smaller than 100, ANSYS artificial displacement amplitude vs the cross-section ratio represents the direct ratio.

通过与实验值理论值的比较发现：在粗细端截面积比大到100的范围里，ANSYS仿真的位移振幅放大系数与截面积比成正比。

The stress-strain curve of new-old concrete and HPRRC, are suggested to be modeled by two sections: the ascending section of the stress-strain curve is simulated by cubic parabola equation and the descending section is simulated by rational fraction, where the theoretical value is in good agreement with the test value.

新—老砼及HPRRC应力—应变全曲线建议采用两段式拟合：上升段采用三次抛物线方程模拟，下降段采用有理分式模拟，理论值与试验结果吻合较好。

The control section of spillway is the key section to curb the water flow.

溢洪道控制段是控制水流下泄的关键部位。溢洪道；溢水管

The power amplification unit is composed of voltage amplification section and current amplification section.

高压放大单元包括电压放大级和电流扩展级，分别实现电压和电流的放大。

The section of voltage amplification is realized by the integration operational amplifier and the current amplification section is made up of the VMOS.

电压放大级采用集成放大器实现，电流扩展级则采用功率MOS管组成互补输出电路。

I want to be a big fish in a small pond.

我要做一条在小池塘里的大鱼。

While the software functioned well, we did not feel the same about their customer support!

虽然该软件运行良好，我们没有同样的感觉他们的客户支持！