切削用量优化的一种加权模型

在金属切削加工中,切削用量的优化是提高切削加工效益的主要途径之一。不同目标下的优化切削速度是不一致的。本文对单个目标优化所得出的两种切削速度进行比较和分析,然后运用多目标规划的加权方法对两个单目标进行综合,给出一种新的计算切削速度公式。     

试论体育教学艺术的创造

着重探讨体育教学艺术的创造问题，探讨的范围主要是体育教学艺术创造的条件、原则、为优化和提高体育教学的整体效益服务，丰富和完善现代教学理论     

二人山银铅多金属矿地质特征及成矿条件分析

在前人认识实践的基础上,利用本区阶段性勘查成果,综合矿区地层、构造,以及矿体的发育情况,通过对矿体地质特征、成矿条件的研究,总结找矿标志,对今后在本地区进一步找矿具有一定的指导意义。     

拟可微B－preinvex规划的最优性条件

本文借助文献［１］中Ｂ－ｐｒｅｉｎｖｅｘ函数的概念及文献［２］中可拟可微的定义，讨论了当目标函数与约束函数均为拟可微Ｂ－ｐｒｅｉｎｖｅｘ函数时的数学规划问题的最优性条件     

对纸质文献命运的再认识

本文回顾并分析了文献演变的历史，社会的知识量与技术条件是影响文献演变的主要因素，通过进一步对社会知识量的现实及发展的预测，结合当今电子出版物技术状况，认为纸质文献不会退出历史舞台，在一个较长时期内文献载体多元化的局面将会出现。     

Conditions of use for sealed cobalt 60 sources

Conditions of use specifications define suitable operating environments for sealed radioactive sources. There are minor differences between manufacturer’s specifications. The basis for these differences is explored and the results of recent water quality surveillance presented. It is concluded that the specifications are readily achievable and that gamma irradiation continues to be a safe and reliable technology.     

Efficient Oxidation of Alcohols with KBrO 3 in the Presence of Silica Chloride and Wet SiO 2

Alcohols were oxidized to their corresponding carbonyl compounds with KBrO 3 in the presence of silica chloride and wet SiO 2 , in solution and under solvent free conditions.     

Vector subdifferentials via recession mappings ∗ ∗this research was supported by grants from M.U.R.S.T (Itall) and the australian research council.$ef:

A vector subdifferential is defined for a class of directionally differentiable mappings between ordered topological vector spaces. The method used to derive the subdifferential is based on the existcnce of a recession mapping for a positively homogeneous operator. The properties of the recession mapping are discussed and they are shown to he similar to those in the real–valued case. In addition a calculus for the vector subdifferential is developed. Final1y these results are used to develop first order necessary optimality conditions for a class of vector optimization problems involving either proper or weak minimality concepts.     

Quasi-Multiplier Rules for Quasidifferentiable Extremum Problems

The purpose of the present article is to contribute to clarify the role of the Lagrange multipliers within the theory of the first order necessary optimality conditions for nonsmooth constrained optimization, when the directional derivatives of functions involved in the extremum problems are not sublinear. This task is accomplished in the particular case of quasidifferentiable problems with side constraints. In such setting, making use of the image-space approach, it is possible to establish a generalized (nonlinear) separation result by means of which a new Lagrange principle is obtained. According to this principle, which seems to fit better quasidifferentiable extremum problems than the classic one, the concept of linear multiplier is to be replaced with that of quasi-multiplier, a sublinear and continuous functional whose existence can be guaranteed under mild assumptions, even when classic multipliers fail to exist. Such as extension allows to formulate in terms of Lagrange function the known optimality necessary condition for unconstrained quasidifferentiable optimization expressed in form of quasidifferential inclusion. Along with this, other multiplier rules are established.     

Necessary optimality conditions and regularity results for state and adjoint state of nonlinear control problems

For optimal control problems of nonlinear evolution equations of first order we derive regularity properties for the corresponding adjoint states where the proof is based on the necessary optimal conditions and smoothness properites of the optimal states. These results are used for the characterization of the optimal solution and the corresponding adjoint state of the periodic three-dimensionel NAVIER-STOKES system.