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...
Investigation of heat transfer in a triple-glazing type window at greek climate conditions
Tập 3 - Trang 750-763 - 2013
Heat loss through building windows has a major effect on the energy efficiency
of the buildings. The window studied in this paper is a triple-glazing type
window pane in which spaces contain dry air. The window is placed in a specially
developed test chamber at the Energy and Environmental Research Laboratory of
Central Greece University of Applied Sciences at Chalkida. At one side of the
test cha...
The influence of triggers geometry upon the stiffness of cylindrical thin walled tubes
Tập 4 - Trang 101-109 - 2014
Today’s automobile manufacturers are increasingly using lightweight materials to
reduce weight; these include plastics, composites, aluminium, magnesium alloys,
and also new types of high strength steels. Many of these materials have limited
strength or ductility, therefore in many cases the rupture being serious
consequences during crashes, underscore Picketta et al. in their studies.
Automotive ...
Performance analysis of first iteration koch curve fractal log periodic antenna of varying flare angles
Tập 3 - Trang 51-57 - 2012
Miniaturization has always been a crucial challenge in the field of antenna
engineering. In the recent past a number of researchers have shown that fractal
geometry have potential to design smaller, broad band and multi band antennas.
In this proposed work performances of log periodic fractal antennas of different
flare angles have been investigated. Simulation results show that fractal log
period...
A window detection technique with adjustable threshold for transmitted reference receivers
Tập 3 - Trang 58-66 - 2012
This paper presents a threshold decision circuit with an adjustable detection
window designed in a 90-nm IBM CMOS technology. Together with an RF mixer, the
decision Section realizes the circuit implementation of the back-end of a
transmitted reference ultra wideband receiver, which is yet to be reported in
literature. The proposed circuit is built on a differential amplifier core and
avoids the u...
Reliable analysis for time-fractional nonlinear differential difference equations
- 2013
In this study, we used HPM to determine the approximate analytical solution of
nonlinear differential difference equations of fractional time derivative. By
using initial conditions, the explicit solutions of the coupled nonlinear
differential difference equations have been derived which demonstrate the
effectiveness, potentiality and validity of the method in reality. The present
method is very e...
Low temperature impact toughness of the main gas pipeline steel after long-term degradation
Tập 4 - Trang 408-415 - 2014
The correlation of microstructure, temperature and Charpy V-notch impact
properties of a steel 17G1S pipeline steel was investigated in this study.
Within the concept of physical mesomechanics, the dynamic failure of specimens
is represented as a successive process of the loss of shear stability, which
takes place at different structural/scale levels of the material. Characteristic
stages are anal...
Envisioning engineering education and practice in the coming intelligence convergence era — a complex adaptive systems approach
Tập 3 - Trang 606-619 - 2013
Some of the recent attempts for improving and transforming engineering education
are reviewed. The attempts aim at providing the entry level engineers with the
skills needed to address the challenges of future large-scale complex systems
and projects. Some of the frontier sectors and future challenges for engineers
are outlined. The major characteristics of the coming intelligence convergence
era ...
Bandwidth optimization of compact microstrip antenna for PCS/DCS/bluetooth application
Tập 4 - Trang 281-286 - 2014
A novel compact broadband microstrip patch antenna is presented for various
wireless applications. The proposed antenna has been fabricated and the
impedance bandwidth and radiation pattern are measured. The simulated and
measured antenna characteristics along with radiation pattern and gain are
presented. It is stated that the proposed designed antenna can completely cover
the required band width...