非线性优化

It is based on nonlinear homotopic BP neural network with nonlinear normalization method to identify the oil pumping model, and the genetic algorithm to optimize the downtime.

利用非线性规范化方法的非线性同伦BP神经网络对采油模型进行辨识，采用遗传算法优化停机时间。

This paper discusses the nonlinear inversion algorithms instructively andmainlystudytwokinds ofnonlinearinversionalgorithms: SimulatedAnnealingConjugate Grads and Artificial Neural Network Genetic Algorithms, these two methods can decrease the iteration times and avoiddroppinginto the local extremum, we do the model calculation and confirm thevalidityofthealgorithm.

对非线性反演算法进行了有益的探讨，主要研究了两种非线性混合优化反演算法：模拟退火共轭梯度混合反演和神经网络遗传反演算法，两种混合算法都达到了减少迭代次数、避免陷入局部极值的目的，并进行了模型试算，验证了算法的有效性。

Particle swarm optimization and linear matrix inequality were used for the design of input-constrained nonlinear predictive controller .

将微粒群算法与线性矩阵不等式用于输入受限非线性预测控制器的设计，提出了基于PSO与LMI联合优化的非线性预测控制算法。

The former uses Eigen-associative Learning algorithm to learn various facial expressions according to a face image with neutral expression. The latter is a two-level fusion approach which combines local linear and global nonlinear subspace learning. Amongst, the local linear subspace learning adopts eigen-representation technique for video sample compression in temporal domain; the global nonlinear subspace learning synthesizes optimized facial expressions in spatial domain.

前者采用特征关联学习算法根据一幅中性表情人脸图像合成具有其它表情的人脸图像；后者是一种结合局部线性和全局非线性子空间分析的两层融合方法，其中局部线性子空间学习采用特征表示技术在时间域对视频样本进行压缩、全局非线性子空间学习在空间域内产生优化的人脸表情。

Parts of current parallel databases support expanding of data types, but all of them lack of theoretical foundation. It is difficult to predicate the performances of parallel query, complicated to optimize parallel query and unattainable to keep the correctness of parallel query optimization This thesis, for the first time, combines monoid algebra system with BSP parallel model systematically, and provides a general-purpose parallel object-relational database systems-PORDBMS.

文章系统地研究了资源分配问题的分解协调理论与方法，给出了非线性分解式模型的构造和有效的求解方法，其中对主问题提出了适应性较强的修正算法，可用于一些难于公式化的问题的模型构造与求解，逐步寻优策略可有效地求解非线性关联约束优化问题。

According to the optimization design and reactor networks design of chemical system engineering, the method which restriction nonlinear programming problems can be transformed to the no-restriction no-linear programming problems was put forward.

针对化工系统工程中的优化设计、反应器网络设计等问题，提出了一种将有约束的非线性规划问题转化为无约束的非线性规划问题的北京化工大学博士学位论文方法，使用本论文提出的改进遗传算法对这类问题进行了求解，提高了计算效率和计算精度，能有效地寻找到全局最优解。4。

When some parameters undergo the nonlinearity model, this algorithm can exactly present the posterior distribution, which is able to make full use of sensor measurement message every time, and optimize measurement variance.

按实际的非线性模型演化时，该算法能够很好地对非线性函数的后验均值与方差进行拟合，并充分利用了传感器每次量测带来的信息并进一步优化了测量方差。

A new kinematically admissible velocity field is constructed. On operating with a linear failure criterion that exceeds the actual nonlinear failure criterion, the objective function formulation of the upper bound theorem leads to a classical nonlinear programming problem where the objective function, which is to be minimized, corresponds to the dissipated power.

本论文在上限定理的基础上，首次提出&切线法&与非线性&序列二次规划&优化相结合的计算方法，使在非线性屈服下求解岩土承载力或稳定性问题成为可能，为上限定理的广泛应用开辟了新的途径。

The simulation, evaluation and optimization of an unli near multicircuit pipeline system can be realized by solving an unlinear equati on set whose scale grows exponentially with the scale of the network.

通过对一组规模随网络环路规模呈指数增长的非线性方程组的求解，实现对非线性多环管路网络系统的仿真、评估和优化。

Then a global separable nonlinear least-squares identification method which estimates the time delays and transfer function parameters separably is derived to reduce the possibility of convergence to a local minimum by using the global optimization theory.Furthermore,the GSNLS method is modified to a novel global separable nonl...

为降低收敛于局部最小的可能性，利用全局优化理论，推导了全局可分离的非线性最小二乘辨识方法；为消除强观测噪声所引起的参数估计的偏差，将GSNLS方法调整为一新颖的全局可分离的非线性多新息递推最小二乘辨识方法，仿真实验验证了算法的有效性。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。