Central European Journal of Engineering最新文献_第7页

Some functional properties of composite material based on scrap tires 废轮胎基复合材料的若干功能性能

Central European Journal of Engineering Pub Date : 2013-09-01 DOI: 10.2478/s13531-013-0113-x

R. Plēsuma, L. Mālers

{"title":"Some functional properties of composite material based on scrap tires","authors":"R. Plēsuma, L. Mālers","doi":"10.2478/s13531-013-0113-x","DOIUrl":"https://doi.org/10.2478/s13531-013-0113-x","url":null,"abstract":"The utilization of scrap tires still obtains a remarkable importance from the aspect of unloading the environment from non-degradable waste [1]. One of the most prospective ways for scrap tires reuse is a production of composite materials [2] This research must be considered as a continuation of previous investigations [3, 4]. It is devoted to the clarification of some functional properties, which are considered important for the view of practical applications, of the composite material. Some functional properties of the material were investigated, for instance, the compressive stress at different extent of deformation of sample (till 67% of initial thickness) (LVS EN 826) [5] and the resistance to UV radiation (modified method based on LVS EN 14836) [6]. Experiments were realized on the purposefully selected samples. The results were evaluated in the correlation with potential changes of Shore C hardness (Shore scale, ISO 7619-1, ISO 868) [7, 8]. The results showed noticeable resistance of the composite material against the mechanical influence and ultraviolet (UV) radiation. The correlation with the composition of the material, activity of binder, definite technological parameters, and the conditions supported during the production, were determined. It was estimated that selected properties and characteristics of the material are strongly dependent from the composition and technological parameters used in production of the composite material, and from the size of rubber crumb. Obtained results show possibility to attain desirable changes in the composite material properties by changing both the composition and technological parameters of examined material.","PeriodicalId":407983,"journal":{"name":"Central European Journal of Engineering","volume":"134 30","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113940102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Elastic analysis of exponential FGM disks subjected to internal and external pressure 内外压作用下指数FGM盘的弹性分析

Central European Journal of Engineering Pub Date : 2013-09-01 DOI: 10.2478/s13531-013-0110-0

M. Z. Nejad, M. Abedi, Mohammad Hassan Lotfian, M. Ghannad

引用次数: 26

Anaerobic wastewater treatment using anaerobic baffled bioreactor: a review 厌氧折流板生物反应器处理厌氧废水研究进展

Central European Journal of Engineering Pub Date : 2013-09-01 DOI: 10.2478/s13531-013-0107-8

S. R. Hassan, I. Dahlan

引用次数: 23

An exploration of FMCDM approach for evaluating the outcome/success of GSD projects 探索用FMCDM方法评估GSD项目的成果/成功

Central European Journal of Engineering Pub Date : 2013-09-01 DOI: 10.2478/s13531-012-0070-9

A. K. Sangaiah, A. Thangavelu

{"title":"An exploration of FMCDM approach for evaluating the outcome/success of GSD projects","authors":"A. K. Sangaiah, A. Thangavelu","doi":"10.2478/s13531-012-0070-9","DOIUrl":"https://doi.org/10.2478/s13531-012-0070-9","url":null,"abstract":"This study presents a fuzzy multi-criteria decision making (FMCDM) approach for analyzing the influential factors affecting the outcome/success of global software development (GSD) projects. The main aim of this study is to demonstrate the potential of proposed methodology based on FMCDM which is used to measure the offshore/onsite teams’ partnership quality dimensions and underlying the influential factors towards the outcome of GSD projects. The uncertainty and subjective vagueness within the decision making process are dealing with fuzzy linguistic terms quantified in an interval scale [0,1]. The proposed FMDCM framework is used to determine the priority weights of partnership quality factors and rating the GSD project outcome/success from the service provider perspective into three dimensions: service quality, schedule and cost improvement. The predicted GSD project outcome values are obtained to facilitate organization and to determine the impact of offshore/on-site teams’ partnership quality towards success of GSD project outcome otherwise initiate actions to improve the GSD project outcome. This study established survey research method that involves thirty-eight critical influential factors evaluated by twenty software professionals for their assessment of GSD projects outcome in India.","PeriodicalId":407983,"journal":{"name":"Central European Journal of Engineering","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115427370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 38

Hydrodynamic perspectives of soil scour in fluvial environment 河流环境下土壤冲刷的水动力观点

Central European Journal of Engineering Pub Date : 2013-09-01 DOI: 10.2478/s13531-013-0112-y

S. Salim, R. Jayaratne

{"title":"Hydrodynamic perspectives of soil scour in fluvial environment","authors":"S. Salim, R. Jayaratne","doi":"10.2478/s13531-013-0112-y","DOIUrl":"https://doi.org/10.2478/s13531-013-0112-y","url":null,"abstract":"The major concern for many hydraulic structures is the effect of scour at the toe, when the racing floodwater scours away the bed just downstream of the piers. Therefore, understanding the soil-hydrodynamic interaction needs to be investigated. In this study, a series of 2D laboratory tests have been carried out to study the likelihood of soil scour due to the soil-hydrodynamic interaction and influence of sediment properties. Characteristics such as sediment deposition patterns, longitudinal/lateral spreading length/area, and bed scour profiles for three sediment diameters (i.e. 0.26, 0.30 and 2.40 mm) under dry and wet soil conditions are studied intensively. Experimental results revealed that soil of identical diameters under wet and dry conditions caused significant changes in soil scour rate and deposition patterns. Transport rates in dry condition were much slower than wet condition. It was observed that, for the same flow condition, different soils gave different long term equilibrium deposition patterns due to the grain size distribution and particle shape. Eddies were generated behind the soil samples which resulted in forming a series of ‘crescent’ zones. Findings of this study could offer a qualitative outline of the effects of various parameters to demonstrate a better representation of estimating scour rate in fluvial condition.","PeriodicalId":407983,"journal":{"name":"Central European Journal of Engineering","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131161451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prediction and analysis of radial overcut in holes drilled by electrochemical machining process 电化学加工工艺钻孔径向过切的预测与分析

Central European Journal of Engineering Pub Date : 2013-09-01 DOI: 10.2478/s13531-011-0074-x

M. Tajdari, S. Chavoshi

引用次数: 8

A fractal circular polarized RFID tag antenna 一种分形圆形极化RFID标签天线

Central European Journal of Engineering Pub Date : 2013-09-01 DOI: 10.2478/s13531-012-0072-7

Guesmi Chaouki, A. Ferchichi, A. Gharsallah

引用次数: 1

A review of thrust-vectoring in support of a V/STOL non-moving mechanical propulsion system 支持V/STOL非移动机械推进系统的推力矢量技术综述

Central European Journal of Engineering Pub Date : 2013-09-01 DOI: 10.2478/s13531-013-0114-9

José C. Páscoa, A. Dumas, M. Trancossi, P. Stewart, D. Vucinic

{"title":"A review of thrust-vectoring in support of a V/STOL non-moving mechanical propulsion system","authors":"José C. Páscoa, A. Dumas, M. Trancossi, P. Stewart, D. Vucinic","doi":"10.2478/s13531-013-0114-9","DOIUrl":"https://doi.org/10.2478/s13531-013-0114-9","url":null,"abstract":"The advantages associated to Vertical Short-Take-Off and Landing (V/STOL) have been demonstrated since the early days of aviation, with the initial technolology being based on airships and later on helicopters and planes. Its operational advantages are enormous, being it in the field of military, humanitarian and rescue operations, or even in general aviation. Helicopters have limits in their maximum horizontal speed and classic V/STOL airplanes have problems associated with their large weight, due to the implementation of moving elements, when based on tilting rotors or turbojet vector mechanical oriented nozzles. A new alternative is proposed within the European Union Project ACHEON (Aerial Coanda High Efficiency Orienting-jet Nozzle). The project introduces a novel scheme to orient the jet that is free of moving elements. This is based on a Coanda effect nozzle supported in two fluid streams, also incorporating boundary layer plasma actuators to achieve larger deflection angles. Herein we introduce a state-of-the-art review of the concepts that have been proposed in the framework of jet orienting propulsion systems. This review allows to demonstrate the advantages of the new concept in comparison to competing technologies in use at present day, or of competing technologies under development worldwide.","PeriodicalId":407983,"journal":{"name":"Central European Journal of Engineering","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127738215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 35

Coordinated signal control for arterial intersections using fuzzy logic 基于模糊逻辑的主干道交叉口协调信号控制

Central European Journal of Engineering Pub Date : 2013-09-01 DOI: 10.2478/s13531-013-0101-1

Davood Kermanian, A. Zare, S. Balochian

引用次数: 5

The use of artificial neural networks to predict the muscle behavior 利用人工神经网络来预测肌肉的行为

Central European Journal of Engineering Pub Date : 2013-09-01 DOI: 10.2478/s13531-012-0067-4

P. Kutílek, S. Viteckova, Z. Svoboda, P. Smrcka

{"title":"The use of artificial neural networks to predict the muscle behavior","authors":"P. Kutílek, S. Viteckova, Z. Svoboda, P. Smrcka","doi":"10.2478/s13531-012-0067-4","DOIUrl":"https://doi.org/10.2478/s13531-012-0067-4","url":null,"abstract":"The aim of this article is to introduce methods of prediction of muscle behavior of the lower extremities based on artificial neural networks, which can be used for medical purposes. Our work focuses on predicting muscletendon forces and moments during human gait with the use of angle-time diagram. A group of healthy children and children with cerebral palsy were measured using a Vicon MoCap system. The kinematic data was recorded and the OpenSim software system was used to identify the joint angles, muscle-tendon forces and joint muscle moment, which are presented graphically with time diagrams. The musculus gastrocnemius medialis that is often studied in the context of cerebral palsy have been chosen to study the method of prediction. The diagrams of mean muscle-tendon force and mean moment are plotted and the data about the force-time and moment-time dependencies are used for training neural networks. The new way of prediction of muscle-tendon forces and moments based on neural networks was tested. Neural networks predicted the muscle forces and moments of healthy children and children with cerebral palsy. The designed method of prediction by neural networks could help to identify the difference between muscle behavior of healthy subjects and diseased subjects.","PeriodicalId":407983,"journal":{"name":"Central European Journal of Engineering","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125900454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10