Results 51 to 60 of about 4,362,785 (247)

ОПТИМІЗАЦІЯ ДОБОВОГО ГРАФІКУ РОБОТИ ГІДРОЕЛЕКТРОСТАНЦІЇ З УРАХУВАННЯМ НЕЛІНІЙНОЇ ФУНКЦІЇ ВИТРАТ НА ВЛАСНІ ПОТРЕБИ

open access: yesПраці Інституту електродинаміки Національної академії наук України
A mathematical model of the daily distribution of the available hydro resources of the dam hydroelectric power station is presented, taking into account the non-linear function of technological costs of electrical energy.
Д.О. Олефір   +3 more
doaj   +1 more source

The Design of Drawing Process of Cylindrical Cup with Oval Bottom Using Computer Simulation

open access: yesMATEC Web of Conferences, 2017
Based on technological calculations, technology of one-operation drawing without blankholder was designed for production of a large-dimensional drawpiece with shape of welded on concave bottom.
Kapustová Mária, Sobota Róbert
doaj   +1 more source

INDUSTRIAL AND TECHNOLOGICAL STRUCTURALS OF THE UKRAINE ECONOMY

open access: yesСтатистика и экономика, 2016
The importance of total factor productivity for improving national competitiveness is presented based on the calculations. The trends of industrial and technological structural changes are analysed.
Anna A. Smaglyuk
doaj   +1 more source

Vibrational and electrical properties of Cu2−xTe films: experimental data and first principle calculations

open access: yesScientific Reports, 2018
Vibrational and electrical properties of sputtered films of the copper telluride system are presented. Despite of its technological importance in photovoltaics, the fundamental properties of copper tellurides are poorly understood.
J. Salmón-Gamboa   +4 more
semanticscholar   +1 more source

The high-pressure behavior of CaMoO4

open access: yes, 2017
We report a high-pressure study of tetragonal scheelite-type CaMoO4 up to 29 GPa. In order to characterize its high-pressure behavior, we have combined Raman and optical-absorption measurements with density-functional theory calculations.
Cavalli, E.   +6 more
core   +1 more source

Innovative aspects of underground coal gasification technology in mine conditions [PDF]

open access: yes, 2018
Purpose. Development of innovative approaches in technological and technical solutions improvement for coal seam gasification. Methods. Carrying-out of native and world experience in the coal reserves development by underground gasification technology ...
Dychkovskyi, R   +4 more
core   +1 more source

EVALUATION OF MANUFACTURING OPERATIONS RELIABILITY ON TECHNOLOGICAL PATH OF PROCESSING TOOLS

open access: yesВесці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук, 2017
Processes and equipment are classified based on mutual interactions between elements of a technological system. Reliability of each type of the technological system and operated process is different due to varying complexity of the performed operations ...
M. I. M. I. Kulak, N. S. Golub
doaj  

Энергетические характеристики топлив и способы их определения

open access: yesИзвестия высших учебных заведений: Проблемы энергетики, 2017
Chemical energies and exergies reflect more correctly and completely the energy potentials of fuels than the calorimetric values that generally used in practical calculations.

doaj   +1 more source

Structural Stability and Magnetic Ordering in BiFeO3 Perovskite Oxide: A Comparative Study GGA+U vs L(S)DA+U

open access: yesAnnals of West University of Timisoara: Physics, 2020
Ab initio calculations of BiFeO3 magnetic perovskite are carried. Accurate density functional theory calculations were performed considering a U-Hubbard correction (DFT+U) to account for on-site Coulomb interactions of the 3d-Fe states.
Derras M., Hamdad N.
doaj   +1 more source

Room Temperature Intrinsic Ferromagnetism in Epitaxial Manganese Selenide Films in the Monolayer Limit. [PDF]

open access: yesNano letters (Print), 2018
Monolayer van der Waals (vdW) magnets provide an exciting opportunity for exploring two-dimensional (2D) magnetism for scientific and technological advances, but the intrinsic ferromagnetism has only been observed at low temperatures. Here, we report the
D. O’Hara   +10 more
semanticscholar   +1 more source

Home - About - Disclaimer - Privacy