微分

On the basis of similarity principle study of the ASP ternary complex flooding, we adopt the method of simplicity, take the foam into differential equation, construct the similarity criterion and the similarity principle of differential conditions, the similarity criterion and the similarity principle are checked and analyzed by numerical simulation and physical simulation method.

在三元复合驱相似原理研究的基础上，采用简化的方法，将泡沫相引入微分方程，建立了泡沫复合驱物理模拟全相似准数及不同条件下的相似准则，并利用数值模拟方法、物理模拟方法对准则进行了检验和敏感性分析。

In order to depress the noise, a lock-in differential conductance measurement system is designed.

为了抑制噪声的影响，应用交流技术开发了有更高精度的锁相微分电导测量系统。

Based on virtual instrument technology, automatic measurement systems for measuring I-V curve and differential conductance were realized.

基于虚拟仪器技术实现了I-V曲线和微分电导的自动化测量系统。

Based on conformal mapping and differential geometry theory,a triangular mesh parametrization method by optimizing deformation energy is proposed in the paper.

本文首先基于保形映射和微分几何相关理论，定义了一种统一衡量参数化的角度变形和面积变形的变形能量。

The character is often broken, conglutination, distorted and redundant, so it is necessary to correct and repair the character in order to removing the unnecessary information and retrieving the essential information which embody the author's intention.

偏微分方程的图像恢复、图像平滑和图像分割等功能，能十分有效的应用于手写体字符的预处理，使处理过的图像在很大程度上反应书写者的书写意图。

The theory of rectilinear congruence is an important field in differential geometry.

直线汇理论是古典微分几何的一个重要研究领域。

Based on differential geometry and spatial engaging theory,a set of formula of conical surface double enveloping worm gearing had been derived and its figures,position and distribution had been depicted by graphs.

以微分几何与空间啮合理论为基础，推导了锥面二次包络圆柱蜗杆传动两次包络过程中的啮合方程和主要啮合性能指标方程，以图直观的表示出其形状、位置和分布状况。

The main objective of the course in conjugate element theory should be to develop in the engineering student the ability to Vector, differential geometry, gear theory.

在啮合元件理论课程的主要目的使工程的学生对向量微分几合及齿轮理论有所认识并用於实务设计上。

As an important content in mathematics, Conjugation can be studied and discussed from different aspects such as differential coefficient, algebra, geometry and so on.

摘要共轭是数学中一个重要的内容，讨论也有不同的方法，可以用微分、代数、几何等方法。

It takesthe weighted average of the L2 norm of the difference of the observation and thesolution of the system and the L2 norm of the difference of conormal derivativeat the different sides of the interface for every subdomain as cost functional andthe smooth coefficients of the subproblem and the value of solution of the originalproblem at interface as identification parameters;Using the property of continu-ous functional defined on compact set,the existence of the optimal solution of theidentification problem is proved;The necessary conditions of optimality charac-terized by the system equation,the adjoit equation and the variational inequalitysimultaneously are given by introducing the conception ofdifferential andadjoit variable;An algorithm is devised and its flow graph is given.

其次，针对分片光滑动力系统的特征，结合正演过程的区域分解算法，建立了分片光滑系统的分解区域参数辨识模型，该模型以子区域上解的实测值与计算值之差的L2范数和界面两侧的通量差的L2范数的加权平均作目标泛函，各子问题的光滑系数及界面上真解的值为待辨识参量；利用紧致集上连续泛函的性质，证明了子区域上参数辨识问题最优辨识参量的存在性；引入微分的概念，借助伴随变量，给出了由系统方程，伴随方程和变分不等式共同表征的最优性必要条件；根据此必要条件设计了算法，给出了算法的程序框图。

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。