Comparison of RZ-OOK and RZ-DPSK Optimal Performance

2015 ◽  
pp. 298-309
Keyword(s):  
Performance Evaluation ◽  
Spectral Density ◽  
Optical Filter ◽  
Performance Comparison ◽  
Signal Pulse ◽  
Q Factor ◽  
Evaluation Tool ◽  
Upper Limit ◽  
Point To Point ◽  
Phase Q

Using the Differential Phase Q (DP-Q) and the traditional Q factor, performance comparison of RZ-OOK and RZ-DPSK in dense OTDM-WDM systems is obtained in this chapter. When signal pulse widths and optical filter bandwidths are optimized, there is no upper limit to WDM channel bit rate (BR) in the purely linear back-to-back configuration. Here, RZ-DPSK performed increasingly better than RZ-OOK in higher spectral density with Q gain increasing from 3 dB to 5 dB. In the nonlinear point-to-point configuration, higher BR leads to increased performance penalties for both RZ-DPSK and RZ-OOK, while RZ-DPSK still outperforms RZ-OOK by up to 4 dB. The results obtained correlate with conventional results, indicating the potential of the DP-Q as a performance evaluation tool in numerical simulations.

Optimization of Parameters for Optimal Performance

2015 ◽  
pp. 272-284
Keyword(s):  
Spectral Density ◽  
Wavelength Division Multiplexing ◽  
Duty Cycle ◽  
Optical Filter ◽  
Spectral Width ◽  
Optical Signal ◽  
Signal Pulse ◽  
Filter Bandwidth ◽  
Wavelength Division ◽  
Optical Time

The impact of the signal pulse width and the optical filter bandwidth on the performance of both RZ and NRZ On-Off Keying (OOK) Optical Time Division Multiplexing (OTDM)-Wavelength Division Multiplexing (WDM) systems are studied in this chapter. Using polynomial fitting, an approximated expression for the optimal signal pulse duty cycle as a function of the spectral density SD and Optical Signal to Noise Ratio (OSNR) is provided. Further, it is found that the bit rate per WDM channel does not affect the optimum signal pulse duty cycle. As the spectral density SD increases, DCopt increases, reducing the signal spectral width to compensate for the reduced the WDM channel frequency spacing ?f. For increasing OSNR, DCopt increases slightly, especially at higher SD. The authors found that ideal NRZ performs better than optimized RZ at high SD but worse at low SD.

OBE performance evaluation tool for Electrical Engineering laboratory

2010 ◽  
Author(s):  
Nani Fadzlina Naim ◽  
Hadzli Hashim ◽  
Mohd Fuad Abdul Latip ◽  
Husna Zainol Abidin ◽  
Suzi Seroja Sarnin
Keyword(s):  
Performance Evaluation ◽  
Electrical Engineering ◽  
Evaluation Tool

scholarly journals Port performance evaluation tool based on microsimulation model

2017 ◽  
Vol 101 ◽  
pp. 05011
Author(s):  
Jzolanda Tsavalista Burhani ◽  
Febri Zukhruf ◽  
Russ Bona Frazila
Keyword(s):  
Performance Evaluation ◽  
Microsimulation Model ◽  
Evaluation Tool

Development of a Driving Cycle for Amman City With Performance Evaluation for ICE Vehicle

2014 ◽  
Author(s):  
M. Abu Mallouh ◽  
B. W. Surgenor ◽  
E. Abdelhafez ◽  
M. Salah ◽  
M. Hamdan
Keyword(s):  
Performance Evaluation ◽  
Fuel Cell ◽  
Fuel Economy ◽  
Performance Comparison ◽  
Driving Cycle ◽  
Accurate Estimation ◽  
Accurate Evaluation ◽  
Driving Cycles ◽  
Considerable Research ◽  
Future Work

A good driving cycle is needed for accurate evaluation of a vehicle’s performance in terms of emission and fuel consumption. Driving cycles obtained for certain cities or countries are not usually applicable to other cities or countries. Therefore, considerable research has been conducted on developing driving cycles for certain cities and regions. In this paper, a driving cycle for a taxi in Amman city, the capital of Jordan, is developed. Significant differences are noted when comparing the Amman driving cycle with other driving cycles. A model of a gasoline powered vehicle is used to conduct a performance comparison in terms of fuel economy and emissions utilizing the developed Amman driving cycle and six other worldwide driving cycles. The developed Amman driving cycle is very useful in obtaining accurate estimation of fuel economy and emissions for vehicles running on Amman roads and will be used in future work to study the performance of hybrid fuel cell/ battery vehicles.

SWAP, a performance evaluation tool

1999 ◽  
Vol 146 (1) ◽  
pp. 21
Author(s):  
S. Dumas ◽  
G. Gerlinger ◽  
G. Gardarin
Keyword(s):  
Performance Evaluation ◽  
Evaluation Tool ◽  
A Performance

scholarly journals Development, implementation and reliability assessment of an emergency physician performance evaluation tool

CJEM ◽  
2000 ◽  
Vol 2 (04) ◽  
pp. 237-245 ◽  
Author(s):  
Jeremy Etherington ◽  
Grant Innes ◽  
James Christenson ◽  
Jonathan Berkowitz ◽  
Robert Chamberlain ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Performance Evaluation ◽  
Correlation Coefficient ◽  
Emergency Physician ◽  
Physician Satisfaction ◽  
Single Individual ◽  
Evaluation Tool ◽  
Emergency Nurses ◽  
Intra Class Correlation ◽  
Intra Class Correlation Coefficient

ABSTRACT Evaluation of physician practice is necessary, both to provide feedback for self-improvement and to guide department heads during yearly evaluations. Objective: To develop and implement a peer-based performance evaluation tool and to measure reliability and physician satisfaction. Methods: Each emergency physician in an urban emergency department evaluated their peers by completing a survey consisting of 21 questions on effectiveness in 4 categories: clinical practice, interaction with coworkers and the public, nonclinical departmental responsibilities, and academic activities. A sample of emergency nurses evaluated each emergency physician on a subset of 5 of the questions. Factor analysis was used to assess the reliability of the questions and categories. Intra-class correlation coefficients were calculated to determine inter-rater reliability. After receiving their peer evaluations, each physician rated the process’s usefulness to the individual and the department. Results: 225 surveys were completed on 16 physicians. Factor analysis did not distinguish the nonclinical and academic categories as distinct; therefore, the survey questions fell into 3 domains, rather than the 4 hypothesized. The overall intra-class correlation coefficient was 0.43 for emergency physicians, indicating moderate, but far from perfect, agreement. This suggests that variability exists between physician evaluators, and that multiple reviewers are probably required to provide a balanced physician evaluation. The intra-class correlation coefficient for emergency nurses was 0.11, suggesting poor reliability. Overall, 11 of 15 physicians reported the process valuable or mostly valuable, 3 of 15 were unsure and 1 of 15 reported that the process was definitely not valuable. Conclusion: Physician evaluation by a single individual is probably unreliable. A useful physician peer evaluation tool can be developed. Most physicians view a personalized, broad-based, confidential peer review as valuable.

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