https://repository.utm.md/handle/5014/4599 2026-04-19T15:52:31Z 2026-04-19T15:52:31Z BOSTAN, Ion https://repository.utm.md/handle/5014/33682 2025-11-12T15:57:05Z 2024-01-01T00:00:00Z

Precessional transmissions. Vol. 3: Surface Generation and Applications BOSTAN, Ion The monograph PRECESSIONAL TRANSMISSIONS consists of three volumes and is structured into 12 chapters with distinct contents, which as a whole refect the development of precessional transmissions from idea to implementation. Volume 3 - Precessional Transmissions: Surface Generation and Applications - includes chapters 9 -12, devoted to the development of manufacturing technologies of conical toothed wheels based on new methods of generating teeth with non-standardized convex/concaves flank profiles, les, made by spatial tumbling-rolling with tools of „cone trunk” shape, of „peripherally profiled disc” shape and of cylindrical shape on numerically controlled multi-axial machine tools, including through non-conventional technologies with plastic pressure injection, metal powder sintering, electroerosion and 3D printing. Representative examples of precessional transmission applications with power and kinematic bolted AB and toothed AD gears are also presented in the form of reducers or drive mechanisms based on them for various machines, mechanical systems and technological equipment. This monograph, by the way of approaching the problems, represents an interface of the academic textbook and of the research-design guideline, comprising all the stages of product development: from idea - to theoretical and experimental research; from design - to manufacture and implementation. The work is addressed to researchers in the feld of exact sciences, engineersmachine builders, Bachelor, Master and Doctoral degree students in higher technical education, especially to all those concerned with the research of mechanical transmissions, as well as those interested in innovative activity.

2024-01-01T00:00:00Z BOSTAN, Ion https://repository.utm.md/handle/5014/33679 2025-11-12T15:55:50Z 2024-01-01T00:00:00Z

Precessional transmissions. Vol. 2: Contact Geometry, Kinematics and Bearing BOSTAN, Ion The monograph PRECESSIONAL TRANSMISSIONS consists of three volumes and is structured into 12 chapters with distinct contents, which as a whole refect the development of precessional transmissions from idea to implementation. Volume 2 - Precessional Transmissions: Contact Geometry, Kinematics and Bearing - includes chapters 7 and 8, devoted to the development of the geometry and kinematics of tooth contact in precessional gears under the aspects of increasing the bearing capacity and reducing the power losses at relative sliding with friction between conjugated anks. The pro les of the teeth, the geometry of the convex-concave multiple pair contact and the kinematics of the contact point are described analytically according to the constructive parameters of the gear. The modi cation of the tooth shape, de ned by the geometry of the convex-concave contact and the degree of replacement of relative sliding by rolling friction of the conjugated anks, is described. The extension of gear ratios to the area of small values depending on the correlation of the tooth numbers of the conjugated wheels is addressed. This monograph, by the way of approaching the problems, represents an interface of the academic textbook and of the research-design guideline, comprising all the stages of product development: from idea - to theoretical and experimental research; from design - to manufacture and implementation. The work is addressed to researchers in the eld of exact sciences, engineers-machine builders, Bachelor, Master and Doctoral degree students in higher technical education, especially to all those concerned with the research of mechanical trans-missions, as well as those interested in innovative activity.

2024-01-01T00:00:00Z BOSTAN, Ion https://repository.utm.md/handle/5014/33678 2025-11-12T15:56:13Z 2024-01-01T00:00:00Z

Precessional transmissions. Vol. 1: Synthesis, Kinematics and Calculation Elements BOSTAN, Ion The monograph PRECESSIONAL TRANSMISSIONS consists of three volumes and is structured into 12 chapters with distinct contents, which as a whole refect the development of precessional transmissions from idea to implementation. Volume 1 - Precessional transmissions: Synthesis, Kinematics and Calculation Elements - includes chapters 1 6, devoted to the structural and kinematic synthesis studies of precessional transmissions of the K H V, 2K H and combined types, the development of the fundamental theory of the multiple pair gear with spherospatial interaction of conjugated teeth, the experimental research on physical models of their functional characteristics, followed by the iden cation of the criteria of the operating capacity and the calculation methods at resistance of gears with bolts and the toothed ones with convex-concave, convex-rectilinear and concave-concave contact. This monograph, by the way of approaching the problems, represents an interface of the academic textbook and of the research-design guideline, comprising all the stages of product development: from idea - to theoretical and experimental research; from design - to manufacture and implementation. The work is addressed to researchers in the eld of exact sciences, engineers-machine builders, Bachelor, Master and Doctoral degree students in higher technical education, especially to all those concerned with the research of mechanical trans-missions, as well as all those interested in innovative activity.

2024-01-01T00:00:00Z ZESTREA, Petru TURCULEŢ, Mihail CIOBANU, Nicolae https://repository.utm.md/handle/5014/15256 2021-05-26T12:12:19Z 2018-01-01T00:00:00Z

Terminologie tehnică în domeniul urbanismului, construcţiilor, cadastrului urban ZESTREA, Petru; TURCULEŢ, Mihail; CIOBANU, Nicolae Lucrarea are aspect enciclopedic. Aceasta include material educativ ce vizează întreg sistemul de construcții, urbanism și cadastru urban, domeniu nou cu dezvoltări revoluționare la zi. Materialul este destinat în principal studenților specialităților Urbanism și planificare urbană; Arhitectură; Construcții; Geodezie; Cadastru; Evaluarea imobilului; Inginerie minieră; Drept patrimonial; Organizarea teritoriului; Geografie; Administrare publică, angajaților A.P.L., dar, în egală măsură, poate constitui un document de studiu şi aprofundare pentru orice persoană care doreşte să pătrundă în esenţa sistemului menționat. Fişierul ataşat conţine: Introducere, Cuprins, Bibliografie. Textul integral al publicației poate fi accesat pe site-ul http://library.utm.md. Accesul prin logare este valabil pentru studenţi, masteranzi, doctoranzi şi cadre didactice UTM.

2018-01-01T00:00:00Z