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INDONESIA
Civil Engineering Journal
Published by C.E.J Publishing Group
ISSN : 24763055     EISSN : 24763055     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
Civil Engineering Journal is a multidisciplinary, an open-access, internationally double-blind peer -reviewed journal concerned with all aspects of civil engineering, which include but are not necessarily restricted to: Building Materials and Structures, Coastal and Harbor Engineering, Constructions Technology, Constructions Management, Road and Bridge Engineering, Renovation of Buildings, Earthquake Engineering, Environmental Engineering, Geotechnical Engineering, Highway Engineering, Hydraulic and Hydraulic Structures, Structural Engineering, Surveying and Geo-Spatial Engineering, Transportation Engineering, Tunnel Engineering, Urban Engineering and Economy, Water Resources Engineering, Urban Drainage.
Arjuna Subject : -
Articles 2 Documents
 1 
Search results for , issue " Vol 5, No 1 (2019): January" : 2 Documents clear
Infill Architecture as a Solution for Livability and Historical Texture Quality Promotion Nasrollah Beiglu, Fatemeh Bayandur; Husseini Ghafari, Seyyed Mohammad; Taheri, Aazam
Civil Engineering Journal Vol 5, No 1 (2019): January
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (712.642 KB) | DOI: 10.28991/cej-2019-03091234

Abstract

A brief glance at the city view of Iranian historical cities shows valuable ancient textures, all of which were enjoying appropriate liveliness, mobility and hilarity no longer ago. Today, our urban worn out textures are abandoned due to different reasons. This is while, if the textures enjoy safe, appropriate and lively spaces, organized joy and healthy recreations compatible with the society’s values will take place in them. Organizing cities and historical textures is of great importance for two reasons: one is respecting the elders’ heritages and the other one is obviating limits caused by urban texture decay. Inattention to organizing and restoring worn out historical textures plans during several years have caused them to lose their liveliness, efficiency and former activity. Livability is one of the greatest urban planning ideas in the contemporary period. Livability creation among cities of developing countries is a concerning issue and paying less attention to the issue causes liveliness and livability cadence and texture decay, consequently. Hence, paying attention to life quality, conditions, equipment and the urban residents’ needs are vital issues.  Finally, infill solution is presented in the framework of renovation and improvement   for promotion of quality and empowerment of historical and worn out urban textures along with influential factors of developing such textures.
Synthesis of Guaranteed Stability Regions of a Nonstationary Nonlinear System with a Fuzzy Controller Berdnikov, Vasiliy; Lokhin, Valeriy
Civil Engineering Journal Vol 5, No 1 (2019): January
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1176.371 KB) | DOI: 10.28991/cej-2019-03091229

Abstract

The paper proposes a method for constructing guaranteed regions of stability of nonstationary nonlinear systems on the plane of parameters of a fuzzy PID controller. It is shown that this method allows to determine the full stability areas, which are significantly larger than the areas determined by classical methods (frequency circle criterion, quadratic Lyapunov functions). This improvement is achieved by using the algorithm for constructing spline Lyapunov functions. This type of Lyapunov functions is based on the necessary and sufficient conditions of stability, while the classical methods are only sufficient conditions of stability. In this regard, on the basis of the proposed method, it is possible to calculate the maximum sizes of the sectors in which the nonlinear characteristics in the channels of the fuzzy PID controller should be located. Examples of the synthesis of fuzzy P, PI, PID controllers for a nonstationary control object of the third order are given. Numerical experiments show that the expansion of the boundaries of nonlinear characteristics allows to improve the accuracy in the steady state, and also to almost double the speed of the automatic control system with a nonstationary object. The advantages over linear controllers are demonstrated. The proposed method guarantees the stability inside the calculated stability regions for any character of the change in the nonstationary parameter, as well as for any character of the change in the nonlinear characteristics in the corresponding sectors.

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