Buletinul Institutului Politehnic București - Mecanică, 1989 (Anul 51)

Summary C. Udriște, O. Dogaru • Constrained Extrema on Orbits............................................................ ....................................... 3 ț — ' ’ i . E. Grecu Automorphisms Involutifs of Sympleetic Group......................................................................... 11 O. Șandru, I. Șandru Local Conditions for a Banach Space to Be X- isometric to a Hilbert Space..................... 15 V. Scridoncsi— Călin Energctie SCF Functionals Fitted by the Catastrophe Structures...................................... 19 T. Demian, C. Nițu Wear in Matrix Printheads........................................................................................................... 29 Gh. Iordache, Gh. Ene, T. Sima The Rheological Behaviour of Some Native Ceramic Pastes................................................... 35 Șt. S t a i c u Modelling of Equations in Plane Systems Dynamic................................................................ 41 Mihaela Păunescu, C. Tacă, Mariana Ștcfănescu Stress Analysis in Pressure Vessel Cylindrical Shell—Plane Flange Junction..................... 49 E. Curatn Zone Netwoorks Matrix for Uniform lluminution in Microlilhograpbying installations . . 59 D. Robescu, T. Petrov ici, Sz. Lanyi, Anne Marie Bcșliu, I. Constantinescu Technique and Equipment for Wastewater Pnrificution, Resulted of the Rain'd Ships ................................................................................................................................................. 65 Al. Petcovici The Thermodynamical Study upon Emptying Limited Capacity Tanks....................... 71 I. Părăușanu Criticai Speed Computer Program for Rotor Bearing System Using Finite Element Method .................................................................................................................................................. 83 C. Bălan Two Problems in Kinematics of Viscous Fluid FTow......................................................... 95

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