Combination Machine Analysis and Design

针对大型焊接结构件的焊后加工问题，本文主要探讨双面镗车组合机床的设计问题。从工艺分析入手，对956Ⅱ装载机大型结构件后车架进行加工工艺分析，为确保焊后加工质量与各组件间的形位精度要求，对结构件各部件分清主次，使焊接、加工的基准统一，设计合理的工艺方案，并通过经济可行性分析，确定通过设计组合机床来完成加工任务。 本文重点阐述了工艺方案设计、组合机床设计、工装设计、刀具设计、液压系统设计、PLC控制设计等6个方面，经过分析论证，提出用闲置的两个镗孔车端面动力头与两个机械滑台来完成后车架铰接孔与四个端面的加工，工件用副车架支承架的孔定位，设计可平移微调的工装来确保4个端面的加工余量及相互间的位置尺...According to the problem of large structural part machining after welding, this article mainly discusses how to design two-end boring and turning combination machine tool. Starting with process analysis, this article carrys out machining process analysis for rear frame of Wheel loader Model 956Ⅱ. In order to guarantee machining quality after welding and the geometric precision among different asse...学位：工程硕士院系专业：信息科学与技术学院自动化系_控制工程学号：X20043103

Lagrange multipliers and generalized differentiable functions in vector extremum problems

In this paper, we establish a necessary optimality condition for a nondifferentiable vector extremum problem which involves a generalized vector-valued Lagrangian function. Such a condition is stated for a wide class of functions, which embraces the differentiable ones and a subclass of locally Lipschitzian functions. The condition embodies the classic theorem of F. John in multiobjective optimization

Massimo della somma tra una funzione lineare ed una funzione lineare fratta

We present a sequential method to solve a constrained extrema problem with feasible region defined by linear inequalities and objective function expressed as a sum of a linear and homografical functions. The technique used finds a finite number of local extrema, the last being the global one. © 1985 Springer-Verlag

Stationary points and necessary conditions in vector extremum problems

The concept of lower limit for a real-valued function is extended to vector optimization; the vector lower limit allows us to propose a definition of a vector lower semi-stationary point which extends the concept of critical Pareto point. The study of the strict connection between a lower semi-stationary point and a local vector minimum point permits us to obtain necessary and/or sufficient optimality conditions for non differentiable multiobjective functions, which assume a simple form in the differentiable case. Some of these results are characterized to Pareto vector problems and to the scalar case in order to obtain known conditions and new ones

Some results on regularity in vector optimization

In this paper we suggest an approach to regularity in vector optimization; some necessary or sufficient regularity conditions are given for a wide class of nondifferentiable vector optimization problems which embraces the convex ones

REGULARITY CONDITIONS FOR CONSTRAINED EXTREMUM PROBLEMS

Necessary and/or sufficient conditions are stated in order to have regularity for nondifferentiable problems or differentiable problems. These conditions are compared with some known constraint qualifications