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Načrtovanje avtomatiziranih regalnih skladiščnih sistemov z uporabo simulacijskega postopka
Matjaž Šraml, Tone Lerher, Janez Kramberger, Iztok Potrč, 2004, izvirni znanstveni članek

Opis: V prispevku je predstavljen simulacijski model avtomatiziranega regalnega skladiščnega sistema z enojno pomično in večpomičnimi mizami. Glavni namen predstavljene raziskave je določitev zmogljivosti sistema z večpomičnimi mizami, glede na sistem z enojno pomično mizo. Slednje pomeni glavni delež in pomoč pri postopku načrtovanja avtomatiziranega regalnega skladiščnega sistema. Povečanje pretočne zmogljivosti transportno-skladiščnih enot je mogoče z uporabo sistema z večpomičnimi mizami, glede na sistem z enojno-pomično mizo. V inženirski praksi se največkrat uporablja sistem z enojno pomično mizo, ki temelji na dvojnem delovnem krogu, medtem ko sistem z večpomičnimi mizami temelji na štirikratnem in šestkratnem delovnem krogu. Problem se pojavi pri uporabi ustrezne upravljalne strategije, za zagotovitev pogoja o najmanjših vožnjah regalnega dvigala. V ta namen smo uporabili posebno domiselno metodo, poimenovano "Strategija x", ki razvrsča zaporedje skladiščnih in odpremnih zahtev, z namenom po minimizaciji povprečnega časa vožnje regalnega dvigala. Za ovrednotenje domiselne metode s sistemom večpomičnih miz smo uporabili tehniko diskretnih numeričnih simulacij. Rezultati simulacijske analize so pokazali očitno povečanje pretočnih zmogljivosti sistema z večpomičnimi mizami v primerjavi s sistemom enojne pomične mize.
Ključne besede: transport systems, high storage racks, automated warehousing, discrete event simulation, storage operation, performance analysis
Objavljeno: 10.07.2015; Ogledov: 300; Prenosov: 4
URL Polno besedilo (0,00 KB)

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Simulations of VoIP applications in INET framework
Sebastijan Horvatić, 2017, magistrsko delo

Opis: This master's thesis describes the support for modelling Voice over Internet Protocol (VoIP) applications in the INET Framework. First, it briefly presents the VoIP technology and factors responsible for the VoIP quality of service. Next, the thesis moves on to discuss the OMNeT++ environment and the INET Framework, their installation and usage. Following this, it examines all of the INET packages and modules available for VoIP modelling, with all VoIP-related INET examples then shortly described and tested. By using INET, our own network and application models are created and simulated using different parameters. Comparisons of the simulation results are carried out and some of the best-found parameters for the VoIP communications are presented. At last, the calculation of jitter by using the obtained simulation results and Excel program is described, because jitter is not shown in the simulation results in INET.
Ključne besede: voice over internet protocol, performance analysis, simulation, real-time transport protocol, user datagram protocol
Objavljeno: 18.08.2017; Ogledov: 79; Prenosov: 19
.pdf Polno besedilo (3,86 MB)

5.
Method for evaluating the throughput performance of shuttle based storage and retrieval systems
Tone Lerher, Banu Ekren, Zaki Sari, Bojan Rosi, 2016, izvirni znanstveni članek

Opis: In this paper a method for throughput performance calculation of shuttle based storage and retrieval systems (SBS/RS) is presented. SBS/RS represent a new technology in automated storage and retrieval systems. Since it is important to design SBS/RS right the first time due to the relative inflexibility of the physical layout, we provide a proposed method for the throughput performance calculation of these systems. The performance of the system is considered as a throughput capacity of the SBS/RS as a whole.
Ključne besede: automated warehouses, performance analysis, shuttle based systems, storage, logistics
Objavljeno: 12.07.2017; Ogledov: 68; Prenosov: 1
.pdf Polno besedilo (611,95 KB)

6.
Measuring efficiency of nations in multi sport events
Roma Mitra Debnath, Ashish Malhotra, 2015, izvirni znanstveni članek

Opis: This paper used a data envelopment analysis (DEA) to measure the performance of the nations participating in the Commonwealth Games. To increase the consistency of the research, multiple models were employed to validate the result, but the nature of the input and output remained same throughout the paper. The objective of this study was to establish some realistic targets in terms of number of players for all participant countries and evaluations of their performance as well as benchmarks against the most efficient country. This study would help the nations optimize the size of their players to maximize the outcome in terms of the number of medals won in sporting events.
Ključne besede: performance measurement, data envelopment analysis, efficiency, Commonwealth Games
Objavljeno: 13.11.2017; Ogledov: 26; Prenosov: 0
.pdf Polno besedilo (1,51 MB)

7.
The analysis of barriers in succession processes of family business with the use of grey incidence analysis (Polish Perspective)
Ewa Więcek-Janka, Rafał Mierzwiak, Joanna Kijewska, 2016, izvirni znanstveni članek

Opis: The article presents results of research on the identification and evaluation of barriers faced by successors in family businesses during the first process of succession. The analysis of empirical material used grey systems theory, which was considered as an equivalent for the analysis of small samples and qualitative research. While conducting the literature review and empirical study, the authors concentrated on (a) the identification of barriers in the development of family firms and (b) eliciting the perspective of the new generation of owners in family firms entering the succession process through an empirical analysis of the assessed level of risk in relationships with family and business.
Ključne besede: family business, company performance, business efficiency, leadership, ownership, family, risk, research, grey incidence analysis, grey system theory
Objavljeno: 14.11.2017; Ogledov: 7; Prenosov: 0
.pdf Polno besedilo (695,38 KB)

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