基于目标约束函数的汽车电子机械制动系统性能优化

为优化汽车电子机械制动系统制动性能,考虑汽车满载以及空载使用率,提出基于目标约束函数的汽车电子机械制动系统性能优化方法。以汽车制动力最优分配为目标建立目标函数,以N1类汽车ECE相关法规建立约束函数,针对汽车制动过程中影响制动压力的制动阀平衡力,将制动力最优分配转化为制动压力响应优化问题,基于汽车制动力最优分配的目标函数以及约束函数建立汽车制动力综合平衡优化模型,并通过水平激振力振动响应、竖直激振力振动响应以及激振力矩振动响应求解该模型,实现汽车电子机械制动系统性能优化。结果表明,汽车经优化后制动工况较为稳定,前轮抱死时的制动减速度大于后轮抱死时的制动减速度,说明优化方法提高了汽车制动性能。

基于最小哈希的网络单信道重复数据剔除算法

剔除重复数据是保证网络高效运行不可缺少的步骤,但该过程易受信号强度、网络装置、路由器性能等问题的干扰。为此,提出基于最小哈希的网络单信道重复数据剔除算法。首先利用哈希算法中的散列函数对网络单信道数据实行聚类处理,然后采用带有监督判别的投影算法对聚类后的数据进行降维处理,最后采用代数签名预估数据,保证数据之间的计算开销最小,再构造最小哈希树生成校验值,在更新去重标签的同时,通过双层剔除机制完全剔除单信道中的重复数据。实验结果表明,该算法的执行时间短,且计算和存储开销较小。

跨流域调水工程水量调度模拟演算研究

论文通过建立跨流域联合调水模拟模型，对南水北调东线水量调度进行模拟演算，建立反映系统结构、行为和功能的数学模型，通过计算机对模型进行求解，得到所模拟系统的有关特性，从而找到一条优化配置方法，实现优化调度，改善因缺水而恶化的区域环境，使缺水区域经济得到良性发展，满足人们不断增长的物质文化生活需要。

Another Approach to Multiobjective Programming Problems with V-invex Functions

In this paper, optimality conditions for multiobjective programming problems having V-invex objective and constraint functions are considered. An equivalent multiobjective programming problem is constructed by a modification of the objective function.Furthermore, a (α, η)-Lagrange function is introduced for a constructed multiobjective programming problem, and a new type of saddle point is introduced. Some results for the new type of saddle point are given.

Economic Dispatch with Convex and Non-Convex Fuel Cost Functions Including Line Losses Using Pattern Search

This article presents an application of generalized pattern search （PS） algorithm to solve economic load dispatch （ELD） problems with convex and non-convex fuel cost objective functions. Main objective of ELI） is to determine the most economic generating dispatch required to satisfy the predicted load demands including line losses. Relaxing various equality and inequality constraints are considered. The unit operation minhnum/maximum constraints, effects of valve-point and line losses are considered for the practical applications. Several case studies were tested and verified, which indicate an improvement in total fuel cost savings. The robustness of the proposed PS method have been assessed and investigated through intensive comparisons with reported results in recent researches. The results are very encouraging and suggesting that PS may be very useful tool in solving power system ELD problems.

两种严格界面向目标误差估计方法的等价性

在模型检验研究中,针对离散误差的后验误差估计扮演着重要角色。在工程有限元分析中,有关问题解答场的标量性质的目标输出量是后验误差分析中人们所关注的。在已有的面向目标误差估计技术中,有2种方法能够提供目标量误差的严格上下界,即本构关系误差法与凸目标函数优化法。该文简要总结了这2种方法,并从计算列式的一致性和基本原理的等价性2个层面论证了2种方法的等价性,给出了2种严格界方法的本质均为余能原理的论断。对2种方法等价性的探讨有助于结合2种表达格式的优势,并拓展到更复杂的问题中,形成简明有效的计算列式。

A proximal point algorithm revisit on the alternating direction method of multipliers

The alternating direction method of multipliers(ADMM)is a benchmark for solving convex programming problems with separable objective functions and linear constraints.In the literature it has been illustrated as an application of the proximal point algorithm(PPA)to the dual problem of the model under consideration.This paper shows that ADMM can also be regarded as an application of PPA to the primal model with a customized choice of the proximal parameter.This primal illustration of ADMM is thus complemental to its dual illustration in the literature.This PPA revisit on ADMM from the primal perspective also enables us to recover the generalized ADMM proposed by Eckstein and Bertsekas easily.A worst-case O(1/t)convergence rate in ergodic sense is established for a slight extension of Eckstein and Bertsekas’s generalized ADMM.