Central European Journal of Engineering
2081-9927
1896-1541
Cơ quản chủ quản: N/A
Phân tích ảnh hưởng
Các bài báo tiêu biểu
A reliable iterative method for solving the time-dependent singular Emden-Fowler equations
Tập 3 - Trang 99-105 - 2012
Many problems of physical sciences and engineering are modelled by singular boundary value problems. In this paper, the variational iteration method (VIM) is used to study the time-dependent singular Emden-Fowler equations. This method overcomes the difficulties of singularity behavior. The VIM reveals quite a number of features over numerical methods that make it helpful for singular and nonsingu......
Modelling and simulation of explosions in soil interacting with deformable structures
Tập 2 - Trang 532-550 - 2012
A detonating explosive interacting with a deformable structure is a highly transient and non-linear event. In field blast trials of military vehicles, a standard procedure is often followed in order to reduce the uncertainties and increase the quality of the test. If the explosive is buried in the ground, the state of the soil must meet specific demands. In the present work, laboratory experiments......
AMMA 2013 — 3 rd International congress automotive, motor, mobility, ambient
Tập 4 - Trang 100-100 - 2014
The influence of thickness of CrN coating on the durability of hot forging dies
Tập 1 - Trang 210-216 - 2011
This article presents results which enabled the determination of the role of CrN coating and the influence of its thickness on the effectiveness of hybrid layer “nitrided layer / CrN coating” in the process of increasing the durability of forging dies. Dies coated with hybrid layers “nitrided layer / CrN coating” with various CrN coating thickness were — after different maintenance periods — subje......
A critical review of propulsion concepts for modern airships
Tập 2 - Trang 189-200 - 2012
After a few decades in which airships have been depromoted to the level of being only considered as a mere curiosity they seem now to reappear. The main reasons for this are related to the recent progress in technology of materials, aerodynamics, energy and propulsion. Airships are also presenting themselves as green friendly air vehicles, in particular if solar powered airships are considered. Th......
Dual band triangular slotted stacked microstrip antenna for wireless applications
Tập 3 - Trang 221-225 - 2013
In this paper stacked configuration of microstrip antenna is used to produce dual wide band which is suitable for various wireless applications. Using triangular slot and stacking of foam substrate of dielectric constant 1, two bands of bandwidth 18.70% and 12.10% is obtained. The antenna is fed by coaxial probe feeding technique. The proposed patch antenna is designed on the foam substrate and si......
Energy management of electric and hybrid vehicles dependent on powertrain configuration
Tập 2 - Trang 253-263 - 2012
Electric and hybrid vehicles are going to become the most reliable source of transport for future years. The CO2 and NOx targets in Euro 6 normative puts the producers of vehicles in a dilemma, whether to adapt the internal combustion engines further, or to develop hybrid or electric power trains that are going to reach the pollution limit of the future norms or to go below that. Before acting a w......
ASIC and FPGA based DPWM architectures for single-phase and single-output DC-DC converter: a review
- 2013
Pulse width modulation (PWM) has been widely used in power converter control. This paper presents a review of architectures of the Digital Pulse Width Modulators (DPWM) targeting digital control of switching DC-DC converters. An attempt is made to review the reported architectures with emphasis on the ASIC and FPGA implementations in single phase and single-output DC-DC converters. Recent architec......
Integration of thermophysiological body model in CFD
Tập 3 - Trang 513-521 - 2014
A two-node mathematical model of the human thermophysiological system has been integrated into a Computational Fluid Dynamic (CFD) simulation of the airflow in a room. Temperature inputs from the CFD are used by the model to evaluate the dry and latent heat flux from the body surface and output them as boundary conditions. This is an iterative process and convergence is ensured by under-relaxation......