2013 7th IEEE GCC Conference and Exhibition (GCC)最新文献

{"title":"Modified QR-D and MMSE PMI selection technique for MIMO closed loop spatial multiplexing in LTE/LTE-advanced","authors":"Ahmed Wagdy, T. Khattab, E. Sourour","doi":"10.1109/IEEEGCC.2013.6705756","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705756","url":null,"abstract":"Limited feedback closed-loop spatial multiplexing evolved as an attractive technique during the development of Multi Input Multi Output (MIMO) in Long Term Evolution (LTE). Spatial multiplexing involves transmitting independent streams of data across multiple antennas to maximize throughput. Closed-loop spatial multiplexing adapt the system to the current channel state throughout a limited feedback channel. In This scheme precoding matrix selection is performed by the user equipment (UE) while applying the selected matrix by the transmitter. In this paper, we propose a new algorithm for precoding matrix selection, based on QR decomposition and minimum mean square error (MMSE), which has an attractive performance and computational complexity gain, so it can be used to efficiently select precoding matrix at UE side. A review over the existent selection techniques is introduced. Also we provide a comparison between the performance of the proposed techniques and the ones in the review in terms of bit error rate (BER) and computational complexity.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127575356","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}

{"title":"Optimization of a pressure transmitter manufacturing line","authors":"Ashok S. Vydyanathan, Anand Kumar, R. K. Mittal, Maneesha Bhagchandani","doi":"10.1109/IEEEGCC.2013.6705834","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705834","url":null,"abstract":"Assembly lines are sequential manufacturing processes, consisting of various stages at which parts are added to the product in a planned manner in order to create the finished product much faster than by handcrafting methods, and embodies the principle of the division of labor. At a multinational company in Dubai, an assembly line for pressure transmitters has been recently set up. This manufacturing line is stochastic and dynamic in nature due to a mixed automated and manual line. The operator takes less time for a manual stage with increasing learning. The line is a multi-product line with a line configuration that is neither U-line nor parallel lines. The product line follows more of a Workcenter model where the stations form a network of queues. The number of products completed at the end of the day is to be maximized while minimizing the queue waiting time at the stations where the bottlenecks occur. The bottlenecks occur, not due to large processing or cycle time of the station but rather due to the station being fed by batch processing stations. With this complex set up, the algorithm proposed is simulation based.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114195222","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}

{"title":"A comparative study between diode and thyristor based AC to DC converters for aluminium smelting process","authors":"Mohammed W. Ayoub, F. Robinson","doi":"10.1109/IEEEGCC.2013.6705851","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705851","url":null,"abstract":"Aluminum smelting is one of the most energy consuming industrial processes involving AC-DC conversion using highpower rectifiers. An overview is provided of the most effective power-system configurations employed in this industry. The most reliable and stable rectifier-transformer solutions and their impact on the AC side of the power network are described. Diode- and thyristor-based rectifiers, or AC-DC power converter systems, are compared. Models of the configurations of systems used in the Dubai Aluminium Company smelter power plant are simulated and measured.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121870211","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}

{"title":"A hybrid soft-switching integrated magnetic Ćuk converter for photovoltaic applications","authors":"S. Biswas, N. Mohan","doi":"10.1109/IEEEGCC.2013.6705775","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705775","url":null,"abstract":"The photovoltaic interface has several requirements: a high step-up ratio with clean input and output currents, high efficiency, compact size and ease of design. A novel two-port isolated Cuk topology is proposed in this paper which addresses all of these issues. It has a partial integrated magnetic structure which enables nearly-zero ripple input and output currents along with reduction in size and weight of the passive components. The transformer isolation provides the step-up ratio. The topology also combines an active-clamp structure which allows ZVS (zero-voltage switched) turn-on with passive snubber components which allow a ZCS (zero-current switched) turn-off of the active switches. The functionality of this quasi-resonant circuit is verified by simulating a PV circuit of typical specifications.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114973560","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}

{"title":"On the relevance of speech rhythm metrics to characterize social factors","authors":"Alaidine Ben Ayed, Ghania Hamdani-Droua, Y. Alotaibi, S. Selouani","doi":"10.1109/IEEEGCC.2013.6705848","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705848","url":null,"abstract":"Previous work on rhythm in speech signal has attempted to quantify rhythm metrics and classify languages accordingly into different rhythm classes. These attempts have met with more or less success; new studies conducted on some varieties and regional dialects provide results that are not consistent with their corresponding rhythm class languages. In this work, we try to explain previous results by investigating to what extent rhythm metrics are conditioned by social factors such as differences in age, gender, region, and education level. Experiments conducted on two sentences of the TIMIT database spoken by 630 speakers show that rhythm metrics are highly sensitive to the first three above-mentioned factors.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122828070","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}

{"title":"A simple and efficient approximation to the modified Bessel functions and its applications to Rician fading","authors":"A. AlSaammare, M. Shaqfeh, H. Alnuweiri","doi":"10.1109/IEEEGCC.2013.6705802","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705802","url":null,"abstract":"In recent days, relay assisted cellular networks are gaining more importance in research and development because of the recent adoption of new communication standards with relaying and cooperation communication. This has introduced a multichannel diversity along with the multiuser diversity and the channel aware dynamic resource allocation models. The issue of the optimal location of relays has risen especially when dedicated relays are used as the standard proposes instead of the cooperative model of the users. In this paper, we study the optimal location of a single relay. Furthermore, we study the effect of changing the number of users on the optimal location of the relay. The effect of adding multiple relays to the system is examined. The optimal locations are examined when the relay channels are the only channels to be used by the system and when the direct channel (DT) is also available. The problem formulation assumes, Rayleigh block faded channels, half duplex regenerative (repetition coding) decode-and-forward (DF) relaying strategy, long-term average total transmitted power constraint and orthogonal multiplexing of the users messages within the channel blocks. New simple and accurate approximations to the modified Bessel functions of the first kind, zeroth order I0 (z) and first order I1 (z) are presented. The new proposed approximations are given as a simple finite sum of scaled exponential functions. Comparisons are made between the exact functions, classic approximations, and the new approximation in terms of simplicity and accuracy. The new approximation proves to be sufficiently accurate to bridge the gap between the classic large and small argument approximations and has potential applications in allowing one to analytically evaluate integrals containing Modified Bessel Functions, yielding simple closed-form solutions. A generalized closed-form expression for the average bit error rate over Nakagami-n (Rice) fading, and Rayleigh fading as a special case, are derived as sample applications, and the results are compared with Monte Carlo Simulation, where a very good matching is achieved.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124300232","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}

{"title":"Fault detection and isolation of the wind turbine based on the real-valued negative selection algorithm","authors":"Esmaeil Alizadeh, N. Meskin, M. Benammar, K. Khorasani","doi":"10.1109/IEEEGCC.2013.6705740","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705740","url":null,"abstract":"This paper presents an immune-inspired approach for detecting and isolating faults in a wind turbine system. A negative selection algorithm (NSA) is proposed which is derived from a mechanism in vertebrate immune systems known as negative selection. The proposed strategy is used to perform Fault Detection and Isolation (FDI) on a wind turbine system. The results show that the proposed technique is quite promising for fault detection and isolation in wind turbines.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"54 48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126237011","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}

{"title":"Suspension force model for bearingless AC homopolar machines designed for flywheel energy storage","authors":"E. Severson, R. Nilssen, T. Undeland, N. Mohan","doi":"10.1109/IEEEGCC.2013.6705789","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705789","url":null,"abstract":"Bearingless ac homopolar machines combine magnetic bearing and motor/generator functionality into a single electric machine which features variable excitation, high power density at high rotational speed, a simple and robust rotor structure, and magnet-less excitation. These features make the bearingless ac homopolar machine a promising machine for highspeed flywheel energy storage systems (FESS). The variable excitation of the bearingless ac homopolar machine has the potential to increase the FESS's efficiency by allowing for low excitation during periods of free-wheeling and high-speed operation. However, the magnetic suspension's position stiffness and current stiffness depend upon the excitation level. This dependency must be taken into account in the suspension controller or the magnetic suspension may become unstable at certain excitation levels. A technique for modeling this dependence is presented in this paper and explored through 3D finite element simulation. A prototype design is analyzed for two rotor structures: one with a square airgap length profile and one with an inverted sinusoidal airgap length profile.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129873976","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}

{"title":"Inductive power transfer with wireless communication system for electric vehicles","authors":"Sarah Asheer, Amna Al-Marawani, T. Khattab, A. Massoud","doi":"10.1109/IEEEGCC.2013.6705833","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705833","url":null,"abstract":"This paper explores the employment of inductive power transfer and data transfer (IPDT) for charging of electric vehicles (EV). The main objective of this paper spans the analysis and development of the inductive power transfer (IPT) design, and the practical implementation of the system prototype. The IPT typically consists of two parts; the transmitter and the receiver part. The recitified DC at the transimitter is converted to AC of high frequency through a DC-AC converter with resonat circuits at both ends (receiever and transmitter). The power transferred to the secondary is used for electric vehicle battery charging through a rectified. Data also is transferred wirelessly in order to control the electric vehicles charging process throughout different proposed scenarios. A prototype has been tested experimentally for the IPDT.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"172 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131486059","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}

{"title":"Modelling of high voltage SF6 circuit breaker reliability based on Bayesian statistics","authors":"M. Muratovic, K. Sokolija, M. Kapetanović","doi":"10.1109/IEEEGCC.2013.6705794","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705794","url":null,"abstract":"The biggest drawback in modelling the reliability of high voltage circuit breakers is the lack of access to data on failures in service, due to the very long lifetime of circuit breakers. This paper presents the application of reliability calculation based on Bayesian statistics to a 245 kV SF6 circuit breaker and its operating mechanism. By using the Bayesian theorem, the prior probability density function of failures in circuit breaker components, which is calculated based on data on the circuit breaker and the operating mechanism failures in service, is combined with data on the failures registered during an extensive mechanical development tests. During the tests more than 32000 \"CO\" (close-open) operations were performed. Based on the posterior probability density function, the reliability of circuit breaker components and the overall reliability of the breaker is estimated. The paper also presents some analysis of the impact of circuit breaker maintenance on its reliability.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128737104","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}