... *Corresponding authors: h Performance evaluation of space–time–frequency spreading for MIMOOFDM–CDMA systems Haysam Dahman∗and Yousef ShayanDepartment of Electrical Engineering, Concordia ... wireless communications systems. An important advantage of using STF-domain spreading in MIMO OFDM–CDMA is that the maximum number of users supported 11D. PerformanceEvaluation for Zero Forcing ... This Provisional PDF corresponds to the article as it appeared upon acceptance. Fully formatted PDF and full text (HTML) versions will be made available soon. Performance evaluationof space-time-frequency...
... number of users.D. PerformanceEvaluation for Zero Forcing ReceiverIn this section, we will calculate probability of bit errorfor Zero-Forcing receiver (ZF) [18,19] to examine the performance of ... 2011:139http://asp.eurasipjournals.com/content/2011/1/139Page 12 of 13 RESEARCH Open Access Performance evaluationof space-time-frequencyspreading for MIMO OFDM-CDMA systems Haysam Dahman*and Yousef ShayanAbstractIn ... for OFDM-CDMA system with 4Tx, 2Rx of the prop osed scheme (solid) and 2D OFDM-C DMA (dotted) in aslow fading frequency-selective environment.SNRdBNumber of UsersProposed OFDM-CDMA2D OFDM-CDMA0246810...
... 4.5). Finally, the model evaluation ismade by means of stochastic simulation (Section 4.3).4.3. Evaluation. The evaluation is made by means of sim-ulation. The facilites of CPN Tools have been ... using sharpe,” in Proceedings of the 11th Internat ional Conference on Computer Performance Evaluation. Modelling Techniques and Tools, vol. 1786 of Lecture Notes in Computer Science, pp. 345–349, ... contribution of this workwas the development of a computational tool to automatesame steps of the proposed methodology. The tool wasnamed PECES (Performance and Energy Consumption Evaluation of Embedded...
... lines. Thus one of the most treasured prizes of the 80s hacker is a phone number to some mystery computer. Computers of this era might be running any of dozens of arcane operating systems and ... their computers have been attacked.” Besides, of the computer crimes that *are* reported, few are ever solved. SO, ARE HACKERS A BIG CAUSE OFCOMPUTER DISASTERS? According to the Computer ... to put computer criminals behind bars. COMPUTER CRIMES: HOW COMMON? HOW OFTEN ARE THEY REPORTED? The FBI’s national Computer Crimes Squad estimates that between 85 and 97 percent of computer...
... 64MB of memory, and 2 GB of disk space. On newer computers the performanceof the operating system is extremely fast. The list below gives some idea of the capabilities, but complete lists of ... diskless computer with a few MB of memory. On the other end of the spectrum, Linux will run on most high end computer systems. An average user would expect reasonable per-formance on a computer ... many lower priced computers. By the end of the 1980s most universities were making use of Unix computers in computer science and engineering programs. This created a wealth of graduates who...
... book offers a comprehensive coverage to the mechanics of microelectromechanical systems (MEMS), which are analyzed from amechanical engineer’s viewpoint as devices that transform an input form of energy, ... solid understanding of the principles governing the mechanics of MEMS, and would hopefully enhance the efficiency of modeling anddesigning reliable and desirably-optimized microsystems. The workrepresents ... review of the maintools enabling stiffness/compliance characterization of MEMS as it lays thefoundation of further developments in this book. Included are basic topicsfrom mechanics of materials...
... the animation of both the systems along with the graphs of Displacement Vs. time just below the animation window of each of the suspension system. By comparing the performanceof the passive ... objectives of this project have been achieved. Dynamic model for linear quarter car suspensions systems has been formulated and derived. Only one type of controller is used to test the systemsperformance ... [5] Prof. Dr. Yahaya Md. Sam, “Robust Control of Active Suspension System for A Quarter Car Model”, Thesis from University Teknology Malaysia, December 2006. PerformanceEvaluationof Active...
... [47] COMPARATIVE STUDY ON PERFORMANCEEVALUATION OF MUTUAL FUND SCHEMES OF INDIAN COMPANIES Prof. Kalpesh P Prajapati, Assistant Professor, S.V Institute of Management, Gujarat Technological ... source of data is website of Association of Mutual Funds in India (AMFI). The study period is 1st January 2007 to 31st December, 2011. The results ofperformance measures suggest that most of ... Characteristics & performanceevaluationof selected Mutual Funds in India . 9th Indian Institute of Capital Market Conference. [4] Michael, C. J. (1967). The Performanceof Mutual Funds in...
... reflect proper-ties of individual systems and application scenarios.AcknowledgmentsWe thank Nuance Communications Inc. for the use of their speech recognition and synthesis softwareand Alexander ... Predict Recognition Performance in Spoken Dialogue Systems Malte GabsdilDepartment of Computational LinguisticsSaarland UniversityGermanygabsdil@coli.uni-sb.deOliver LemonSchool of InformaticsEdinburgh ... distinction between out -of- grammar (WER ≤ 50) and out -of- grammar (WER> 50) in the gold standard for the classification of (whole) user utterances. We split the out -of- grammar class into two...
... to be popular today.Other, extrinsic, types of human evaluations of NLG systems include measuring the impact of different generated texts on task performance (Young, 1999), measuring how much ... 2005 NIST MT evaluation exercise, usedBLEU-4 as the only method of evaluation. BLEUis a precision metric that assesses the quality of atranslation in terms of the proportion of its word n-grams ... and Human Evaluationof NLG Systems Anja BelzNatural Language Technology GroupCMIS, University of BrightonUKA.S.Belz@brighton.ac.ukEhud ReiterDept of Computing ScienceUniversity of AberdeenUKereiter@csd.abdn.ac.ukAbstractWe...
... the issue ofperformance and assessing performance for differenttypes of computing environments in Section 1.5 on page 25). Embedded ComputersEmbedded computers, the name given to computers ... be driven to opti-mize price -performance. This combination ofperformance (measured primarilyin terms of compute performance and graphics performance) and price of a sys-tem is what matters ... of small numbers of off-the-shelf microprocessors. Even high-end supercomputersare being built with collections of microprocessors. Freedom from compatibility with old designs and the use of...
... task-based evaluations of NLG systems over the Internetis a valid alternative to more traditional laboratory-based evaluations. Specifically, we have shownthat an Internet-based evaluationofsystems ... increasedamount of data also makes it possible to comparethe quality of NLG systems across different evalua-tion worlds and users’ language proficiency levels.We believe that this type ofevaluation ... argue thatan evaluation that is based almost exclusively on na-tive speakers in universities leads to overly benignjudgments about the quality of NLG systems. One advantage of the Internet-based...
... average number of reached nodes—it is a sort of approximated indicator of the “depth” of the propagation process. Since the RE can beinterpreted as the ratio between the average number of reached ... approach is extensively described, for the evaluationof D,in Appendix 4, but can be directly re-adapted for the evaluationof RE and TE. In the remainder of thissubsection, we outline the final ... conditions—this is the very idea of IF. The shape of p, as a function of d, is shown in Figure 5, for different values of cand ρs. It can be observed that the PAF of SIF is monotonically increasing...
... is the sum of the fixed time from the grant time of the tagged i-packetto the start of transmission of the i-packets in the next frameand the transmission times of the random number of i-packets ... statistical behavior of the BS grantbuffer of a particular SS is independent from the behavior of those of the other SSs. Therefore, we model the stochasticbehavior of the BS grant buffer of a particular ... range of loads. In this case, theoptimal value of the total amount of real-time capacities canbe determined.In case of a more general QoS requirement (delay con-straint), the optimal set of...