导数

It will discuss the algorithm from three parts:(1) disparting theselected points;(2) how to find start point and end points first derivative (3) thealgorithm which forms the curve.

本文将主要从3个方面进行论述这一算法：(1)对选定点的纵横划分；(2)划分后端点一阶导数的确定方法；(3)形成曲线的数值方法。

This chapter proposes three conceptions, i.e., Kernelled quasidiferential, star-kernel and star-diferential, and establishes their operational properties. A sufficient theorem and a sufficent and necessity theorem for a quasi-kernel being a kernelled quasidiferential are proven. Both the existence of star-kernel for a quasidiferentiable function and the existence of star-differential for a direnction-ally diferentiable function are established.

在这一章里，首先给出核拟微分，星核与星微分的定义及其它们的运算性质；然后证明了拟核微分的一个充分条件定理及一个充要条件定理；最后讨(来源：A27BC论文网www.abclunwen.com)论拟可微函数星核的存在性及方向可微函数星微分的存在性以及Penot-微分与上下导数之间的关系。

Thischapter proposes three concepts,i.e.,kernelled quasidifferential,star-kerneland star-differential,and establishes their operational properties.A sufficiencytheorem and a sufficiency and necessity theorem for a quasi-kernel being a ker-nelled quasidifferential are proven.Both the existence of star-kernel for a qua-sidifferentiable function and the existence of star-differential for a directionallydifferentiable function are established.The relationships between sub-and su-per derivatives and Penot differentials are discussed as well.

这一章我们引入了三个概念，即核拟微分，星核与星微分并建立了它们的运算性质；证明了拟核为核拟微分的一个充分条件定理及一个充分与必要条件定理；建立了拟可微函数星核的存在性及方向可微函数星微分的存在性并讨论了Penot微分与上、下导数的关系。

His prospective father-in-law, however, reneged, perhaps making this not only the first derivative but the first default on a derivative.

他未来的岳父，但食言，也许这不仅使一阶导数，但第一次违约的衍生产品。

Good effect is obtained. The application of derivative sign binary algorithm in interference fringe skeletonizing overcomes the difficulty of threshold picking in ordinary binary methods.

导数符号二值图法在提取干涉条纹中心过程中的运用，克服了普通二值化方法中阈值难以选取的问题，提高了测量的精确度。

The results show that the calibration model established with firstderivative preprocessing spectra was the best, 18 samples of tested set were predicted with this model, the relative standard errors for the prediction of ami no nitrogen, total acid, salt content and color ratio were 1.516%, 1.811%, 1.798% and 1.893%, respectively.

结果表明，采用一阶导数预处理光谱建立的数学校正模型能得到最佳的预测效果，在对预测集18个样本中的氨基酸态氮、总酸、食盐的含量和色度进行预测时，所得的预测集相对标准偏差分别为1516%， 1811%， 1798%， 1893%。

It is shown that this approach is feasible and can be applied in actual bridge engineering.

训练结果表明神经网络可以应用于实际桥梁气动导数的识别。

Half penalty method and optimism design of ten connecting bar mechanism of plunger slide in double action drawing press;2. The essential boundary condition is imposed by employing a penalty method .

将选择施加在&虚结构&控制点上的虚载荷作为形状优化的设计变量，并将它与无网格Galerkin法相结合来开展结构形状优化研究，采用罚函数法来施加边界条件，通过直接微分法建立了结构形状优化的离散型灵敏度分析算法，利用无网格法研究了节点坐标关于设计变量导数的计算。

Key words:Ofloxacin;Ear drop pills;Orthogonal test;The first order derivative spectorphotometry;PolyglycolPEG

关键词］氧氟沙星；耳用滴丸；正交实验；一阶导数光谱法；聚乙二醇PEG

In this paper an innovative method for machining sculptured surfaces is presented. By using a disc cutter with a concave end instead of traditional ball-ended or drum-shaped tools, and adjusting the cut- ted axis to swing relative to the component being machined under some special rules, the envelope formed by the trace of the tool-nose may have the same derivative up to the third order as the required theoretical surface.

本文提出了一种加工自由曲面的新方法，即采用中凹的盘形铣刀取代传统的球头或鼓形铣刀，在每一行程中让刀具轴线相对于工件按特定的规律摆动，使得在垂直于进给方向的法截面中，由刀尖轨迹形成的包络面与理论曲面的法截线具有相同的1～3阶导数，从而在保持精度不变的前提下，使实际行程次数得以大幅度的减少。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。