Relevant bibliographies by topics / Performance optimization of rating system

Academic literature on the topic 'Performance optimization of rating system'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 May 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Performance optimization of rating system.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Performance optimization of rating system"

1

Al-Hadi, Ismail Ahmed Al-Qasem, Nurfadhlina Mohd Sharef, Md Nasir Sulaiman, Norwati Mustapha, and Mehrbakhsh Nilashi. "Latent based temporal optimization approach for improving the performance of collaborative filtering." PeerJ Computer Science 6 (December 21, 2020): e331. http://dx.doi.org/10.7717/peerj-cs.331.

Full text
Abstract:
Recommendation systems suggest peculiar products to customers based on their past ratings, preferences, and interests. These systems typically utilize collaborative filtering (CF) to analyze customers’ ratings for products within the rating matrix. CF suffers from the sparsity problem because a large number of rating grades are not accurately determined. Various prediction approaches have been used to solve this problem by learning its latent and temporal factors. A few other challenges such as latent feedback learning, customers’ drifting interests, overfitting, and the popularity decay of products over time have also been addressed. Existing works have typically deployed either short or long temporal representation for addressing the recommendation system issues. Although each effort improves on the accuracy of its respective benchmark, an integrative solution that could address all the problems without trading off its accuracy is needed. Thus, this paper presents a Latent-based Temporal Optimization (LTO) approach to improve the prediction accuracy of CF by learning the past attitudes of users and their interests over time. Experimental results show that the LTO approach efficiently improves the prediction accuracy of CF compared to the benchmark schemes.
APA, Harvard, Vancouver, ISO, and other styles
2

Choi, Gyeong Seok, Tae Jung Kim, Jae Sik Kang, and Hyun Jung Choi. "Design and Energy Performance Evaluation of Energy Efficiency Windows with Nanotechnology Convergence Type." Applied Mechanics and Materials 521 (February 2014): 752–56. http://dx.doi.org/10.4028/www.scientific.net/amm.521.752.

Full text
Abstract:
The purpose of this study, including an aluminum frame high efficiency window system is to develop and validate. In this study, simulation program based on the Window and Therm simulation program, aluminum frame profile, thermal bridges through optimization design of barrier efficiency of the 6type aluminum window system was constructed. In the results of high-efficiency windows system performance assessment, U value 0.8 ~ 1.1W/m2·K, air-tightness performance ratings of 1 showed the windows energy efficiency rating that meets the Class 1 or 2 ratings showed. This study is based on an aluminum frame with a high-efficiency windows were secure system design technology, future public housing, commercial buildings is expected to be applied to a variety of buildings.
APA, Harvard, Vancouver, ISO, and other styles
3

Wang, J. H., and F. M. Shih. "Threshold Performance Optimization of a Rotor-Bearing System Subjected to Leakage Excitation." Journal of Engineering for Gas Turbines and Power 112, no. 4 (October 1, 1990): 439–44. http://dx.doi.org/10.1115/1.2906187.

Full text
Abstract:
Fluid leakage in blade tips in turbomachinery may induce instability and limit and output rating. In this work, the optimization technique has been used to find diameters of shaft elements and bearing supports so that the optimized rotor-bearing system can sustain a larger fluid leakage force. The results show that the threshold performance of rotor-bearing systems can be significantly improved by slight modifications of the shaft diameters. The results also indicate that the threshold performance can be improved more significantly by the combination of optimum bearing supports and optimum shaft diameters.
APA, Harvard, Vancouver, ISO, and other styles
4

Davidson, J. H., and H. A. Walker. "Design Optimization of a Two-Phase Solar Water Heater Using R-123." Journal of Solar Energy Engineering 114, no. 1 (February 1, 1992): 53–61. http://dx.doi.org/10.1115/1.2929982.

Full text
Abstract:
Design of a vapor transport solar water heater using R-123 is optimized to maximize thermal performance and minimize life cycle cost. Optimal systems for one and two-story homes are identified in a parametric study of collector area, condenser heat transfer area, water storage tank volume and circulating refrigerant volume for the Solar Rating and Certification Corporation rating procedure. Selection of collector and heat exchanger areas is critical to performance. With warm and cloudless ambient conditions, the most economic system is a large collector area, low efficiency system capable of meeting nearly 100 percent of the load. Under more realistic operating conditions, the best design will place more emphasis on efficiency. The condenser should have sufficient surface area to avoid significant increases in collector operating temperatures. Thermal performance is relatively insensitive to either refrigerant or water storage volume.
APA, Harvard, Vancouver, ISO, and other styles
5

Evans, Lee A., and Ki-Hwan G. Bae. "US Army performance appraisal policy analysis: a simulation optimization approach." Journal of Defense Modeling and Simulation: Applications, Methodology, Technology 16, no. 2 (August 13, 2018): 191–205. http://dx.doi.org/10.1177/1548512918787969.

Full text
Abstract:
An effective performance appraisal system is critical in identifying officers with the knowledge, skills, and abilities to lead the future military force. The US Army uses a forced distribution performance appraisal system that limits the number of above average evaluations raters can award to their subordinates. Aside from job performance, multiple factors contribute to the rating an individual receives in such systems. These factors include a rater’s span of control (the number of subordinates being rated), the frequency at which individuals change raters, regulatory constraints pertaining to the number of top evaluations a rater can award, and the rater behavior. Using performance appraisal data provided by the US Army Human Resources Command, we develop a discrete-event simulation model that represents Army officers in the current forced distribution performance appraisal system. We then apply ranking and selection simulation optimization techniques to evaluate and optimize controllable input parameters in the simulated system. Our results show the potential of reducing the number of officers not receiving the number of above average evaluations commensurate with their performance level by as much as 24%. The results also further indicate the general applicability of simulation optimization in the fields of manpower modeling and policy analysis.
APA, Harvard, Vancouver, ISO, and other styles
6

Sarbu, Ioan, Emilian Valea, and Gabriel Ostafe. "Optimization of Insulation Design for Refrigerating Systems." Applied Mechanics and Materials 510 (February 2014): 202–7. http://dx.doi.org/10.4028/www.scientific.net/amm.510.202.

Full text
Abstract:
Economic operation with minimal energy consumption and low costs of a cooled room or a refrigerant piping system depends largely on the quality and thickness of their insulation. The classical method of insulation rating for refrigeration systems is based on respect of the condition to prevent condensation of water vapours in the air on the surface of insulation or on limiting heat gain, but rarely leads to optimum in terms of a technical and economic criterion. In this paper are described some types of insulation for refrigeration applications and is developed a rating optimization model of these insulations with a high level of generality. It uses multiple dynamic optimization criteria simple or compound, which better reflects the economic and energy complex aspects, present and future. Based on this model were elaborated two computer programs implemented on PC microsystems. Numerical examples will be presented to demonstrate the accuracy and efficiency of the proposed optimization model. These show the good performance of the new model.
APA, Harvard, Vancouver, ISO, and other styles
7

Effendi Amran, Mohd, and Mohd Nabil Muhtazaruddin. "Assessment of Renewable Distributed Generation in Green Building Rating System for Public Hospital." International Journal of Engineering & Technology 7, no. 3.15 (August 13, 2018): 40. http://dx.doi.org/10.14419/ijet.v7i3.15.17404.

Full text
Abstract:
This paper presents an optimization solution for renewable Distributed Generation (DG), as imposed in the Green Building Rating System (GBRS) for a public hospital. Solar photovoltaic DG unit (PV-DG) is identified as a type of DG used in this paper. The proposed optimization via PV-DG coordination will improve the sustainable energy performance of the green building by power loss reduction within accepted lower losses region using Artificial Bee Colony (ABC) algorithm. The setup input data from one of Malaysian public hospitals’ power distribution system is been adopted and simulation results via MATLAB programming show that the optimization of DG forming into bigger-scale imposed system provides a better outcome in minimization of total power losses within appropriate voltage profile as compared to current PV-DG imposed in GBRS. The objective function representing total power losses which also supported by related literature give a measure that forming sufficient and optimal PV-DG assessment criteria is highly important, thus, current PV-DG assessment in GBRS is proposed to be reviewed into new parameter setting for public hospital due to its’ high energy demand and distinctive electrical load profile.
APA, Harvard, Vancouver, ISO, and other styles
8

Rohde, Gustav T., Michael I. Pinard, and Elzbieta Sadzik. "Long-Term Network Performance: Function of Pavement Management System Maintenance Selection Policy." Transportation Research Record: Journal of the Transportation Research Board 1592, no. 1 (January 1997): 1–7. http://dx.doi.org/10.3141/1592-01.

Full text
Abstract:
Most road agencies operate under a scenario in which the maintenance need exceeds the available maintenance funds. In this environment pavement managers are forced to select maintenance and rehabilitation actions on the basis of a defined methodology. This is typically done through a ranking process or through modern optimization routines. In the ranking process the maintenance priority of a road is determined on the basis of the importance and condition of the road. Projects with a high priority rating are carried out first, and projects are then carried out until the available funds are depleted. The more sophisticated pavement management systems use optimization routines that allow for interproject trade-offs when generating a maintenance plan. The importance of the choice of maintenance selection methodology for the long-term network condition is described. Data from an actual road network were used and were subjected to various ranking and optimization functions. This included policies such as fix worst first, use priority index, maximize asset value, minimize transportation costs, and the traditional maximization of area under a condition curve approach. The outcome was evaluated in terms of network condition, network asset value, overall transportation costs, and road user cost. It is shown that the maintenance policy should be compatible with agencies’ long-term maintenance objectives.
APA, Harvard, Vancouver, ISO, and other styles
9

Li, Lianhuan, Zheng Zhang, and Shaoda Zhang. "Hybrid Algorithm Based on Content and Collaborative Filtering in Recommendation System Optimization and Simulation." Scientific Programming 2021 (May 18, 2021): 1–11. http://dx.doi.org/10.1155/2021/7427409.

Full text
Abstract:
This paper explores and studies recommendation technologies based on content filtering and user collaborative filtering and proposes a hybrid recommendation algorithm based on content and user collaborative filtering. This method not only makes use of the advantages of content filtering but also can carry out similarity matching filtering for all items, especially when the items are not evaluated by any user, which can be filtered out and recommended to users, thus avoiding the problem of early level. At the same time, this method also takes advantage of the advantages of collaborative filtering. When the number of users and evaluation levels are large, the user rating data matrix of collaborative filtering prediction will become relatively dense, which can reduce the sparsity of the matrix and make collaborative filtering more accurate. In this way, the system performance will be greatly improved through the integration of the two. On the basis of the improved collaborative filtering algorithm, a hybrid algorithm based on content and improved collaborative filtering was proposed. By combining user rating with item features, a user feature rating matrix was established to replace the traditional user-item rating matrix. K-means clustering was performed on the user set and recommendations were made. The improved algorithm can solve the problem of data sparsity of traditional collaborative filtering algorithm. At the same time, for new projects, it can also predict users who may be interested in new projects according to the matching of project characteristics and user characteristics scoring matrix and generate push list, which effectively solve the problem of new projects in “cold start.” The experimental results show that the improved algorithm in this paper plays a significant role in solving the speed bottleneck problems of data sparsity, cold start, and online recommendation and can ensure a better recommendation quality.
APA, Harvard, Vancouver, ISO, and other styles
10

Wang, J. H., and F. M. Shih. "Improve the Stability of Rotor Subjected to Fluid Leakage by Optimum Diameters Design." Journal of Vibration and Acoustics 112, no. 1 (January 1, 1990): 59–64. http://dx.doi.org/10.1115/1.2930099.

Full text
Abstract:
For high performance turbomachinery, the fluid leakage in the shroud of the blades and the labyrinth seal may cause instability and limit the output rating. In this work, an optimization technique has been used to find the optimum diameters of shaft elements so that the optimized rotor can sustain maximum fluid leakage excitation. The results show that, even without the increase of total mass of the rotor system, the threshold performance of rotor-bearing systems can be significantly improved by slight modification of the shaft diameters.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Performance optimization of rating system"

1

Вєтошкін, Ігор Володимирович. "Рейтингова система навчання студентів з дисципліни робототехніка." Master's thesis, КПІ Ім. Ігоря Сiкорського, 2019. https://ela.kpi.ua/handle/123456789/31789.

Full text
Abstract:
В цій роботі розглянуто проблему у області оптимізації веб-додатків, а саме оптимізація рейтингової системи. Проаналізовано аналоги рейтингових систем для навчання студентів та інформаційні системи, які ознайомлюють користувачів з навчальними закладами, визначено їх основні переваги та недоліки. На основі отриманих результатів визначені основні необхідні модулі, які повинна містити дана система, способи її оптимізації та забезпечення належної швидкодії. В результаті виконання дипломної дисертації розроблено рейтингову систему для навчання студентів. В рамках веб-додатку, здійснено її оптимізацію та значно підвищено швидкодію за рахунок оптимізації структури бази даних, використання фреймворку React в розробці клієнтської частини для створення SPA, впровадження додаткової системи кешування даних, оптимізації запитів до бази даних. Розмір пояснювальної записки – 88 сторінок, 48 ілюстрацій, 22 таблиці та 2 додатки.
This master thesis shows the problem of web application optimization, describes the optimization of the rating system. Analogues of rating systems for student education and information systems were analyzed, their main advantages and disadvantages were identified. On the basis of the obtained results, the basic necessary modules, which should be contained by the given system, ways of its optimization and ensuring proper performance, were created. As a result of the master thesis completion, a rating system for learning students was developed. In the web application, optimization was completed and performance was significantly increased due to optimization of the database structure, using of React framework in the development of the client side for creating SPA, implementation of additional data caching system, optimization database queries. Explanatory note size – 88 pages, contain 48 illustrations, 22 tables and 2 applications.
APA, Harvard, Vancouver, ISO, and other styles
2

Sonti, Phindile Clinton. "Improving the performance management system in a selected firm." Thesis, Nelson Mandela Metropolitan University, 2015. http://hdl.handle.net/10948/d1021172.

Full text
Abstract:
The performance management system has become a vital process of retaining skilled employees, helping to improve communication between the employees and management, providing feedback to employees and clear understanding of job expectation. A performance management system assists the firm to identify the ways to improve individual and firm performance and provides the opportunity for discussion about individual career direction and growth within the firm. It provides the opportunity to set employee targets linked to the departmental targets. The performance management system is the catalyst for firms to become globally competitive and be able to meet targets. Over the years the firm has introduced a performance management system to help employees to achieve their targets, which will result in the company meeting its own objectives. The study focused on the factors that affect the performance management system. The objective of the research was to improve the performance management system of the firm. The study was conducted to assess the effect of the following independent variables on the improvement of the performance management system: leadership style, training, organisational culture, reward system and organisational communication. The sample consisted of only the employees of the firm selected for the study. One hundred and fifty (150) questionnaires were distributed, but only seventy-six (76) respondents (response rate = 50.7 percent) participated in the final study. The empirical results revealed that the three independent variables play a very important role in improving a performance management system. These three variables are organisational culture, training, and reward system. Implementing the recommendations that came from these results will go a long way to making sure that the firm will improve its performance management system.
APA, Harvard, Vancouver, ISO, and other styles
3

Babar, Haseeb Zaman, and Gul Zeb. "Camels rating system for banking industry in pakistan : does CAMELS system provide similar rating as PACRA system in assessing the performance of banks in Pakistan?" Thesis, Umeå universitet, Handelshögskolan vid Umeå universitet, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-48325.

Full text
Abstract:
Financial sector of an economy plays an important role in its economic development and prosperity of the country. Banking industry serves as the backbone of the financial sector that accumulates saving from surplus economic units in the form of deposits and provides it to deficit economic units in the form of advances. Banking industry provides support to economy and industries in specific in the time of recessions and economic crisis. But when banks are at the heart of economic recession or banks are the cause of financial crisis like the recent past financial crisis 2007-09, it makes the situation worst for economic recovery. So it is of great importance to keenly observe the performance of the banks and their compliance with the regulatory requirements.   Performance of the banks is measured at two levels, one is at the management and regulatory level of the banks and another is at external rating agencies. Purpose of regulatory and supervisory rating systems is to measure the bank performance at internal level and its compliance with regulatory requirements to keep the bank on right track. These ratings are highly confidential and are only available to the bank management.  External credit rating agencies examine and evaluate the banks and issue ratings for the general public and investors in particulars. It is of great importance that both these ratings present the same results about the condition of the banks to provide clear information to investors and management. In past several banks suffer from bankruptcy that was the failure of both internal rating systems and credit rating agencies.   CAMELS is the supervisory and regulatory rating system implemented by State Bank of Pakistan. It takes into account six important components of a bank when it evaluates performance of the bank. These components are Capital, Assets, Management, Earning, Liquidity and Sensitivity to market risk. Ratings is assigned to theses components on the scale of 1 to 5 and that is a base for composite rating that also ranged from 1 to 5. PACRA rating agency is the dominant credit rating agency of Pakistan that performs ratings for most banks and industries in the country. In our research we examine the similarities in the results generated by CAMELS rating system and PACRA rating agency. For that purpose we sample seventeen commercial banks of Pakistan Banking industry.   We observed that results generated by sample banks do not show any similarities with each other. This might be an indication of the banks that went on to bankruptcy in past three to four years or a future threat to financial sector of Pakistan.
APA, Harvard, Vancouver, ISO, and other styles
4

蘇靜如 and Ching-yu So. "A study on the performance appraisal system of the Hong Kong Immigration Department." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B41015630.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

del, Valle Yamille E. "Optimization of power system performance using facts devices." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29612.

Full text
Abstract:
Thesis (Ph.D)--Electrical and Computer Engineering, Georgia Institute of Technology, 2010.
Committee Chair: Dr. Ronald G. Harley; Committee Member: Dr. Bonnie Heck; Committee Member: Dr. Deepak Divan; Committee Member: Dr. Ganesh K. Venayagamoorthy; Committee Member: Dr. Miroslav Begovic. Part of the SMARTech Electronic Thesis and Dissertation Collection.
APA, Harvard, Vancouver, ISO, and other styles
6

Konradi, Alexander V. "Performance optimization of the VDFS verified file system." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/113179.

Full text
Abstract:
Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2017
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 51-54).
Formal verification of software has become a powerful tool for creating software systems and proving their correctness. While such systems provide strong guarantees about their behavior, they frequently exhibit poor performance relative to their unverified counterparts. Verified file systems are not excepted, and their poor performance limits their utility. These limitations, however, are not intrinsic to verification techniques, but are the result of designing for proofs, not performance. This thesis proposes a design for large files and in-memory caches that are amenable both to a high-performance implementation and proofs of correctness. It then describes their usage in VDFS, a verified high-performance file system with deferred durability guarantees. The evaluation of VDFS' performance shows that these additions measurably improve performance over previous verified file systems, and make VDFS competitive with unverified file system implementations. This thesis contributes implementation techniques for large files and in-memory caches that can be applied to increase performance of verified systems..
by Alexander V. Konradi.
M. Eng.
M.Eng. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science
APA, Harvard, Vancouver, ISO, and other styles
7

Liu, Charles Z. "Performance optimization of a split-value voting system." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/100631.

Full text
Abstract:
Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2015.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 57-59).
As digital technology becomes more powerful and commonplace, the benefits of using computers to conduct elections become more apparent. In today's elections dominated by paper ballots, we cannot be certain that the election result is correct. Many parts of the world are plagued by corrupt election officials and rampant bribery. In this thesis, we review the cryptographic techniques available for designing a secure election system and introduce a system designed around a verifiable mixnet using split-value commitments. The main work done in this thesis is a series of performance optimizations to the existing prototype, greatly improving the real-world viability of the system. Finally, we suggest further work that can be done to improve performance, fault tolerance, and security. The code that accompanies this thesis may be found at https://github.com/ron-rivest/ split-value-voting.
by Charles Z. Liu.
M. Eng.
APA, Harvard, Vancouver, ISO, and other styles
8

Rajagopalan, Mohan. "Optimizing System Performance and Dependability Using Compiler Techniques." Diss., Tucson, Arizona : University of Arizona, 2006. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu%5Fetd%5F1439%5F1%5Fm.pdf&type=application/pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Karlsson, Rikard. "Power system performance when implementing dynamic rating on a wind farm connected transformer." Thesis, KTH, Elektroteknisk teori och konstruktion, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215949.

Full text
Abstract:
In this study, dynamic transformer rating (DTR) is applied on a medium power transformer thatis in use in the regional transmission grid. The transformer’s rated apparent power is 63 MVA, itis connected between a wind farm at 22kV and the grid, K¨orsb¨arsdalen, at 135kV. Power systemanalysis are carried out on the grid, with the objective to test how DTR and increased wind poweraffects the grid performance with respect to reliability, voltage stability and active losses.Historical measurements of ambient temperature and transformer loading is used to calculatefree transformer capacity based on unity life time loss. For the investigated transformer and giventime period the load can be increased without endanger transformer lifetime. The dynamicallyrated capacity exceeds the nominal capacity through the whole tested time period but DTR showsmost effective during winter when the ambient temperature is colder and therefore, has a coolingeffect on the transformer. DTR is used to calculate available transformer capacity but an increasedcapacity often comes with the expense of decreased lifetime and reliability. With the help of DTRthe current rate of transformer lifetime usage can be calculated and used as input to economicalanalysis where there is a trade of between reliability and profit from increased capacity.Through the power system analysis procedure presented in this report it is possible to sortout the faults that are most probable to cause severe violations, this information can be used forefficient reinforcement of the grid. The contingency and reliability analysis can work as base tofind the solutions that will decrease the probability for violations most efficiently. Furthermore,the developed procedure can also be used when expanding the grid and to determine which gridalternative that will be most reliable.
I den h¨ar studien kommer en dynamisk modell f¨or en transformators maxkapacitet anv¨andas isyfte att utv¨ardera m¨ojligheterna f¨or utbyggnad av vindkraftsparken som ¨ar kopplad till transformatornsl°agsp¨anningssida. P°a transformatorns h¨ogsp¨anningssida finns regionn¨atet, K¨orsb¨arsdalen.Med hj¨alp av den dynamiska modellen ber¨aknas transformatorns varmaste punk. Dem varmastepunkten ¨ar bel¨agen p°a ¨ovre delen av transformatorns lindning. Det ¨ar denna punkts temperatursom s¨atter gr¨ansen f¨or hur mycket str¨om som kan s¨andas genom transformatorn utan att resultera io¨verhettning. O¨ verstiger den varmaste punkten en kritisk temperatur finns risk fo¨r att transformatornlivsl¨angd f¨orkortas. Konceptet dynamisk lastbarhet som bygger p°a termiska modeller kallasp°a engelska ,dynamic transformer rating (DTR).Vidare utv¨arderas effekterna av DTR p°a systemniv°a, K¨orsb¨arsdalens prestanda d°a DTR harimplementeras j¨amf¨ors med det ursprungliga n¨atets prestanda med avseende p°a tillf¨orlitlighet,sp¨anningsstabilitet och aktiva f¨orluster.Historiska m¨atv¨arden p°a omgivningstemperatur och transformatorns last anv¨ands f¨or att ber¨aknatransformatorns tillg¨angliga kapacitet, f¨or det studerade tidsspannet kan transformatorn anv¨andas¨over dess nominella effekt. P°a vintern d°a omgivningstemperaturen ¨ar l°ag kommer DTR till st¨orstnytta, den kalla luften har en kylande effekt p°a transformatorn vilket i sin tur betyder att en st¨orrestr¨om kan s¨andas genom transformatorns lindningar utan att en kritisk temperatur uppn°as.Genom det presenterade tillv¨agag°angss¨attet f¨or systemkraft analyser kan de fel som har st¨orstsannolikhet att resultera i allvarliga konsekvenser sorteras ut. Denna information kan anv¨andassom underlag f¨or reinvesteringar s°av¨al som vid expandering av det befintliga n¨atet.
APA, Harvard, Vancouver, ISO, and other styles
10

潘安妮 and On-ni Anny Poon. "Evaluating HKU's performance review and staff development system: a principal-agent perspective." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B41012902.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Performance optimization of rating system"

1

Massachusetts. Dept. of Personnel Administration. Performance management system guide. Boston]: The Dept., 1988.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Edward, Whalen. Oracle performance tuning and optimization. Indianapolis, IN: Howard Sams Pub., 1996.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Relations, Massachusetts Division of Employee. Employee performance review system (EPRS) manual. [Boston]: Office of Employee Relations [and] Dept. of Personnel Administration, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Engelmann, Curtis H. Managing individual performance: An approach to designing an effective performance management system. Scottsdale, AZ: American Compensation Association, 1996.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Mittra, Sitansu S. Database performance tuning and optimization: Using Oracle. New York: Springer-Verlag, 2003.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Massachusetts. Division of Employee Relations. Employee performance review system: A supervisor's guide. Boston]: Office of Employee Relations [and] Dept. of Personnel Administration, 1987.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Wyoming. Dept. of Administration and Fiscal Control. Personnel Division. State of Wyoming, performance appraisal system: Rules and regulations. [S.l.]: Morris & McDaniel, 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Smith, Raymond L. The reflective leader: Implementing a multidimensional leadership performance system. Englewood, Colorado: Lead + Learn Press, 2013.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Belcastro, Patricia. Evaluating library staff: A performance appraisal system. Chicago: American Library Association, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

United, States Bureau of Alcohol Tobacco and Firearms. Performance management and recognition system. [Washington, D.C.?]: Dept. of the Treasury, Bureau of Alcohol, Tobacco, and Firearms, 1987.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Performance optimization of rating system"

1

Wongthatsanekorn, Wuthichai, and Nuntana Matheekrieangkrai. "Bee Algorithm for Solving Yield Optimization Problem for Hard Disk Drive Component under Budget and Supplier’s Rating Constraints and Hueristic Performance Comparison." In Intelligent Automation and Systems Engineering, 203–16. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4614-0373-9_16.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Lieverdink, Peter. "Performance Monitoring and Optimization." In Pro Linux System Administration, 831–70. Berkeley, CA: Apress, 2009. http://dx.doi.org/10.1007/978-1-4302-1913-2_17.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Matotek, Dennis, James Turnbull, and Peter Lieverdink. "Performance Monitoring and Optimization." In Pro Linux System Administration, 799–837. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2008-5_17.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Oged, M., D. G. Warner, and E. Gurbuz. "Supplier Performance Evaluation and Rating System (Spears)." In Supercollider 5, 291–94. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2439-7_69.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Jarosch, Oliver, and Klaus Bengler. "Rating of Take-Over Performance in Conditionally Automated Driving Using an Expert-Rating System." In Advances in Intelligent Systems and Computing, 283–94. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-93885-1_26.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Richter, Detlev. "System Optimization Based on Performance Indicator Models." In Flash Memories, 247–60. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6082-0_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

El-saidny, Mohamed A. "Analysis and Optimization of LTE System Performance." In Design, Deployment and Performance of 4G-LTE Networks, 103–89. Chichester, UK: John Wiley & Sons, Ltd, 2014. http://dx.doi.org/10.1002/9781118703434.ch3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Kelly, P. G., and J. S. Kelly. "Optimization of High Performance Subsea Cleaning System." In ROV ’86: Remotely Operated Vehicles, 207–22. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4207-3_19.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Wei, Daisen, Xueqing Li, and Longye Tang. "The Performance Optimization of Component-Based System." In Proceedings of the 4th International Conference on Computer Engineering and Networks, 1019–26. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-11104-9_117.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Ruggeri, Eugenio, Apostolos Tsakyridis, Christos Vagionas, Amalia Miliou, Shafiullah Malekzai, George Agapiou, George Datseris, and George Stavroulakis. "Optical Wireless System Performance, Deployment, and Optimization." In Enabling 6G Mobile Networks, 293–328. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-74648-3_9.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Performance optimization of rating system"

1

Wang, J. H., and F. M. Shih. "Threshold Performance Optimization of a Rotor-Bearing System Subjected to Leakage Excitation." In ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1989. http://dx.doi.org/10.1115/89-gt-126.

Full text
Abstract:
The fluid leakage in shroud of the blades and the labyrinth seal of turbomachinery may induce instability and limit the output rating. In this work, the optimization technique has been used to find the diameters of shaft elements and the bearing supports so that the optimized rotor-bearing system can sustain larger fluid leakage force. The results show that the threshold performance of rotor-bearing systems can be significantly improved by slight modification of the shaft diameters. The results also indicate that, the threshold performance can be improved more significantly by the combination of optimum bearing supports and optimum shaft diameters.
APA, Harvard, Vancouver, ISO, and other styles
2

Li, Hongtao, Meinrad Burer, Franc¸ois Marechal, Daniel Favrat, Guolian Hou, Bao-Heng Zhang, and Zhi-Ping Song. "Multi-Criteria Optimization of Pulverized Fuel Coal-Fired Power Generation System Load Dispatching." In International Joint Power Generation Conference collocated with TurboExpo 2003. ASMEDC, 2003. http://dx.doi.org/10.1115/ijpgc2003-40155.

Full text
Abstract:
With a given power demand pattern supplied by a set of pulverized fuel coal-fired (PC) power generation units at various locations, different power dispatching solutions will result in different fuel consumptions, CO2 emissions, and power generation costs. This is due to the performance differences of their shut-down and start-up processes as well as those under the operational conditions, and to fuel prices differences between different power stations. In this paper, a methodology characterized with a multi-objective optimization approach based on a fast evolutionary algorithm is employed to optimize the daily total power generation operating cost and the daily total CO2 emissions. The shut down and start-up processes are divided into 7 sub-operations: load-decreasing, shutdown, boiler ignition preparation, ignition-warming up, connecting to grid, load-increasing and stabilization process, according to their characteristics in order to calculate the fuel consumptions, the CO2 emissions and the cost. Available data have been used to derive the models that characterize the emission and cost performances of typical PC units as well as their rating and partial load performances [1]. From the results of the multi-objective optimization, the so called Pareto Optimal Frontiers (POFs) are used to evaluate the effect of CO2 tax on the optimal power dispatching solutions. The influence of SO2 tax on the CO2 abatement marginal cost is also analyzed.
APA, Harvard, Vancouver, ISO, and other styles
3

Sarabchi, K., and G. T. Polley. "Thermodynamical Optimization of a Combined Cycle Plant Performance." In ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/94-gt-304.

Full text
Abstract:
Computer modelling of Performance optimization was done to examine the effect of key operating variables like compressor pressure ratio, turbine inlet temperature, and recovery boiler pressure on performance parameters of a simple combined cycle and comparison was made to a simple gas turbine cycle. Both thermal efficiency and specific net work were examined as pressure ratio and recovery boiler pressure were varied for each turbine inlet temperature. Also careful consideration was given to admissible values of stack gas temperature, steam turbine outlet dryness fraction, and steam turbine outlet dryness fraction, and steam turbine inlet temperature. Specifically, it was shown that when we treat a combined cycle as an integrated system, efficiency optimization entails a pressure ratio below that suitable for simple gas turbine plant.
APA, Harvard, Vancouver, ISO, and other styles
4

Ye, Zhengmao, Liguang Li, and Habib P. Mohamadian. "Multi-Variable Optimization on Variable Intake Valve Closing Timing System for Engine Overall Performance." In ASME 2005 Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/ices2005-1099.

Full text
Abstract:
Variable valve timing (VVT) technology has a remarkable impact on engine power output, fuel economy and emission levels. To achieve a tradeoff among its potential benefits on various aspects, a novel multi-objective optimization method is proposed to complement among engine performances over entire speed-load regions. Intake valve closing (IVC) timing has been widely accepted to be the most effective means of VVT technologies. IVC timing is therefore investigated to accomplish engine overall performance optimization. The bench tests have been conducted using an introduced variable working position belt extender system. A 5-valve, double overhead cam (DOHC) spark ignition engine is selected. The sample testing data of engine power and torque outputs, fuel economy and emission levels are collected from engine bench tests, which are then interpolated with regular engine speed operating ranges via smoothing cubic spline fitting. For multi-objective control problem, principal component analysis can be conducted for the multiple-objective analysis by alternating different engine parameters, such as valve timing, sparking timing, A/F ratio, and so on. On account of the extra expense of engine experiments, a simplified optimization approach is then formulated in order to analyze the potential of IVC technology in terms of engine power output and fuel economy under constraints of emission levels at individual high speed, medium speed and low speed regions, etc. Variable IVC timing control has been shown in this research to improve engine performance throughout speed-load regions. Multi-variable optimization is also demonstrated to be feasible and effective for the optimal performance achievement on speed-load regions.
APA, Harvard, Vancouver, ISO, and other styles
5

Sunder Raj, Komandur S. "Last Stage Performance Considerations in Low-Pressure Turbines of Power Plants: A Case Study." In ASME 2006 Power Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/power2006-88196.

Full text
Abstract:
The last stage blades (LSB) of low-pressure (LP) turbines power plants have been historically specified and designed on the basis of optimization studies by matching the turbine to the condenser/cooling system for a specified unit rating. LSB sizes for U.S. nuclear applications currently range from 38” to 52” for unit ratings of 600 Mwe to 1200 Mwe. LP turbine arrangements usually consist of two or three double-flow sections in parallel. Last stage end loadings (last stage mass flow divided by the last stage annulus area) vary from approximately 8,000 lb/hr-sq.ft to 14,000 lb/hr-sq.ft, with corresponding unit loadings (electrical output in megawatts divided by last stage annulus area) of 1.1 Mwe/sq.ft to 2.1 Mwe/sq.ft. Several power plants have been upgrading/replacing their LP turbines. Considerations include efficiency, reliability, power uprates, operating license renewals (nuclear), aging, inspection and, maintenance. In some cases, LP turbine rotors are being replaced with new rotors, blading and steam path. Others are replacing LP turbines with new and advanced designs incorporating improved technology, better materials, optimized steam paths, more efficient blading, longer LSB sizes, redesigned exhaust hoods, etc. Unlike the other stages in the LP turbine, the last stage performance is affected by both the upstream (load) and downstream (condenser) conditions. While the LP turbines are being upgraded or replaced, no major modifications or upgrades are being made to the condensers. To address vibration effects due to increased flows and velocities from power uprates, the condenser tubes may be staked. Circulating water pumps may or may not be upgraded depending upon the particular application. Consequently, while improvements in LP turbines lead to more efficient utilization of the available energy and higher output, the last stage performance may be out of synch with the existing condenser/cooling system. Undersized or oversized LSB sizes in relation to the unit rating and end loading may result in less than optimum performance depending upon the design and operating range of the condenser/cooling system. This paper examines the various factors that affect last stage performance of LP turbines. Using a case study, it discusses the relationships between the last stage, the unit rating, the end loading and, the operating range of the condenser/cooling system. It examines different last stage exhaust loss curves and provides recommendations for selection of LSB sizes for optimum performance.
APA, Harvard, Vancouver, ISO, and other styles
6

Ghahremani, Amir R., F. Roshanghalb, R. Jahanbakhshi, M. H. Saidi, and S. Kazemzadeh Hannani. "Performance Analysis and Optimization of High Capacity Pulse Tube Refrigerator." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-24863.

Full text
Abstract:
High capacity pulse tube refrigerator (HCPTR) is a new generation of cryocoolers tailored to provide more than 250 W of cooling power at cryogenic temperatures. The most important characteristics of HCPTR when compared with other types of pulse tube refrigerators are a powerful pressure wave generator, and an accurate design. In this paper the influence of geometrical and operating parameters on the performance of a double inlet pulse tube refrigerator (DIPTR) is studied. The DIPTR is modeled applying the nodal analysis technique, using mass, momentum and energy conservation equations. The model is able to compute instantaneous flow field throughout the system and calculate cooling capacity and COP. The model is validated with the existing experimental data. To perform the optimized mode of operation, the influence of both geometrical and operating parameters on cooling capacity and COP is investigated. The key geometrical parameters considered in this paper are aspect ratios of regenerator and tube section, length ratio of regenerator and tube, and type of screen mesh. The main operating parameters considered are average charge pressure, and position of opening of orifice and bypass. As a result of this optimization a new configuration of HCPTR is proposed. This configuration provides 300 W at 80 K cold end temperature with a frequency of 50 Hz and COP of 0.054.
APA, Harvard, Vancouver, ISO, and other styles
7

Saadat, Mohsen, Anirudh Srivatsa, Perry Y. Li, and Terrence Simon. "Air Compression Performance Improvement via Trajectory Optimization: Experimental Validation." In ASME 2016 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/dscc2016-9825.

Full text
Abstract:
In an isothermal compressed air energy storage (CAES) system, it is critical that the high pressure air compressor/expander is both efficient and power dense. The fundamental trade-off between efficiency and power density is due to limitation in heat transfer capacity during the compression/expansion process. In our previous works, optimization of the compression/expansion trajectory has been proposed as a means to mitigate this trade-off. Analysis and simulations have shown that the use of optimized trajectory can increase power density significantly (2–3 fold) over ad-hoc linear or sinusoidal trajectories without sacrificing efficiency especially for high pressure ratios. This paper presents the first experimental validation of this approach in high pressure (7bar to 200bar) compression. Experiments are performed on an instrumented liquid piston compressor. Correlations for the heat transfer coefficient were obtained empirically from a set of CFD simulations under different conditions. Dynamic programming approach is used to calculate the optimal compression trajectories by minimizing the compression time for a range of desired compression efficiencies. These compression profiles (as function of compression time) are then tracked in a liquid piston air compressor testbed using a combination of feed-forward and feedback control strategy. Compared to ad-hoc constant flow rate trajectories, the optimal trajectories double the power density at 80% efficiency or improve the thermal efficiency by 5% over a range of power densities.
APA, Harvard, Vancouver, ISO, and other styles
8

Cotfas, D. T., S. Mahmoudinezhad, A. Rezania, P. A. Cotfas, and L. Rosendahl. "Effect of Phase Change Material on Performance of Hybrid Photovoltaic-Thermoelectric System under Low Concentration Ratio." In 2021 International Aegean Conference on Electrical Machines and Power Electronics (ACEMP) & 2021 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM). IEEE, 2021. http://dx.doi.org/10.1109/optim-acemp50812.2021.9590022.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Chen, Shang, Tong Zhu, and Huayu Zhang. "Study on Optimization of Pressure Ratio Distribution in Multistage Compressed Air Energy Storage System." In ASME 2018 12th International Conference on Energy Sustainability collocated with the ASME 2018 Power Conference and the ASME 2018 Nuclear Forum. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/es2018-7181.

Full text
Abstract:
Compressed air energy storage is an effective energy storage technology to solve the instability of wind power in distributed energy resources. In this paper, a multistage compressed air energy storage system optimization model is constructed based on the energy conservation equation. Then the system is optimized by differential evolution to improve the system efficiency. Optimal pressure ratios are proposed to distribute the pressures of compressors and expanders. The impact of pressure ratio distribution curve on the system energy efficiency suggests that the change curve of the characteristics vary in different heat exchanger performance. Results show that the change of thermal transfer reactor performance leads to the variety of optimal distribution pressure ratio and energy efficiency of the system. In addition, the differential ratio distribution factor can be effective on the pressure ratio of reasonable allocation. System efficiency optimization results increased by about 1% compared mean value.
APA, Harvard, Vancouver, ISO, and other styles
10

Xiao, Yunhan, Rumou Lin, and Ruixian Cai. "System Optimization of Humid Air Turbine Cycle." In ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/94-gt-240.

Full text
Abstract:
The humid air turbine (HAT) cycle, proposed by Mori et al. and recently developed by Rao et al. at Flour Daniel, has been identified as a promising way to generate electric power at high efficiency, low cost and simple system relative to combined cycle and steam injection gas turbine cycle. It has aroused considerable interest. Thermodynamic means, such as intercooling, regeneration, heat recovery at low temperature and especially non-isothermal vaporisation by multi-phase and multi-component, are adopted in HAT cycle to reduce the external and internal exergy losses relative to the energy conversion system. In addition to the parameter analysis and the technical aspect of HAT cycle, there is also a strong need for “systems” research to identify the best ways, of configuring HAT cycle to integrate all the thermodynamic advantages more efficiently to achieve high performance. The key units in HAT cycle are analyzed thermodynamically and modelled in this paper. The superstructure containing all potentially highly efficient flowsheeting alternatives is also proposed. The system optimization of the HAT cycle is thus represented by a nonlinear programming problem. The problem is solved automatically by a successive quadratic algorithm to select the optimal configuration and optimal design parameters for the HAT cycle. The results have shown that the configuration of the HAT cycle currently adopted is not optimal for efficiency and/or specific power, and the current pressure ratio are too high to be favorable for highest performance. Based on the current technical practice, the optimal flowsheeting for thermal efficiency can reach 60.33% when TIT=1533K, while the optimal flowsheeting for specific power can achieve 1300kW/kg/s air for TIT at 1533K. The optimal flowsheeting configuration is compared favorably with the other existing ones.
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Performance optimization of rating system"

1

Hanlon, Scott. Fenestration System Energy Performance Rating Development and Research. Office of Scientific and Technical Information (OSTI), October 2011. http://dx.doi.org/10.2172/1372311.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Kavanagh, Michael J. Performance Rating Accuracy Improvement through Changes in Individual and System Characteristics. Fort Belvoir, VA: Defense Technical Information Center, April 1989. http://dx.doi.org/10.21236/ada207561.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Walker, H. A., Jal D. Desai, and Ammar Qusaibaty. Life-Cycle Cost and Optimization of PV Systems Based on Power Duration Curve with Variable Performance Ratio and Availability. Office of Scientific and Technical Information (OSTI), February 2020. http://dx.doi.org/10.2172/1601963.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Alt, Jonathan, Willie Brown, George Gallarno, John Richards, and Titus Rice. Risk-based prioritization of operational condition assessments : Jennings Randolph case study. Engineer Research and Development Center (U.S.), April 2022. http://dx.doi.org/10.21079/11681/43862.

Full text
Abstract:
The US Army Corps of Engineers (USACE) operates, maintains, and manages over $232 billion worth of the Nation’s water resource infrastructure. Using Operational Condition Assessments (OCA), the USACE allocates limited resources to assess asset condition in efforts to minimize risks associated with asset performance degradation, but decision makers require a greater understanding of those risks. The analysis of risk associated with Flood Risk Management assets in the context of its associated watershed system includes understanding the consequences of the asset’s failure and a determination of the likelihood that the asset will perform as expected given the current OCA ratings of critical components. This research demonstrates an application of a scalable methodology to model the probability of a dam performing as expected given the state of its subordinate gates and their components. The research team combines this likelihood with consequences generated by the application of designed simulation experiments with hydrological models to develop a measure of risk. The resulting risk scores serve as an input for an optimization program that outputs the optimal set of components to conduct OCAs on to minimize risk in the watershed. Proof-of-concept results for an initial case study on the Jennings Randolph Dam are provided.
APA, Harvard, Vancouver, ISO, and other styles
5

Kreiser, Stephan S. National Security Personnel System: An Optimization Strategy for Implementing Pay-for-Performance. Fort Belvoir, VA: Defense Technical Information Center, March 2006. http://dx.doi.org/10.21236/ada448588.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Lapointe, Linda J., and Robert V. Bryant. Functional Requirements and Measure of Performance for the Manufacturing Optimization (MO) System. Fort Belvoir, VA: Defense Technical Information Center, January 1992. http://dx.doi.org/10.21236/ada251362.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Bergeron, K. D., D. C. Williams, S. E. Slezak, and M. L. Young. SCOPE safety-controls optimization by performance evaluation: A systematic approach for safety-related decisions at the Hanford Tank Remediation System. Phase 1, final report. Office of Scientific and Technical Information (OSTI), December 1996. http://dx.doi.org/10.2172/431191.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Lippert, David, Marshall Thompson, and Charles Wienrank. Performance of Interstate Rubblization in Illinois. Illinois Center for Transportation, July 2021. http://dx.doi.org/10.36501/0197-9191/21-005.

Full text
Abstract:
In Illinois, hot-mix asphalt overlaid concrete pavements typically exhibit reflective cracking of joints and cracks from the pavement below, resulting in shortened life and maintenance issues. Over the years, various patching, fabric, and crack and seat techniques were attempted with few positive results. This led to more aggressive techniques to eliminate the slab action of the concrete pavement where the pavement would be broken or rubblized into pieces typically less than 12 inches. Since the first rubblizing project in 1990, policy, procedures, and specifications have evolved to the point that rubblization is the mainstream option in dealing with problematic concrete pavements. This report summarizes the performance of several interstate rubblizing projects in Illinois by analyzing available data in Illinois Department of Transportation’s pavement management system. Condition rating survey data allowed the serviceability of these projects to be evaluated by surface mix types and asphalt performance grades. Traffic in the form of 18,000 lb equivalent single axle loads was determined for the projects to evaluate fatigue and rutting as well as compare section performance to the design procedure. The research team reviewed plans, design procedures, and specifications to determine best practices and identify where improvements might be made. Data showed that the use of stone matrix asphalt surface mixtures and mixes using PGXX-28 asphalt binders provides improved performance. Overall, rubblizing has shown good to excellent performance. To provide additional life with improved performance, recommendations include adopting softer asphalt grades, increasing the use of stone matrix asphalt, and improving procedures for protecting culverts.
APA, Harvard, Vancouver, ISO, and other styles
9

Prykhodko, Alona M., Oksana O. Rezvan, Nataliia P. Volkova, and Stanislav T. Tolmachev. Use of Web 2.0 technology tool – educational blog – in the system of foreign language teaching. [б. в.], September 2019. http://dx.doi.org/10.31812/123456789/3252.

Full text
Abstract:
This paper discusses the use of a Web 2.0 technology tool – educational blog – in the system of teaching foreign languages for enhancement of teaching effectiveness and optimization of students’ performance. The authors describe the content, characteristics and didactic properties of an educational blog as an alternative or auxiliary educational environment, define its methodological objectives and list a number of advantages of this approach versus conventional teaching model. The effectiveness of the above-mentioned Web 2.0 technology tool was confirmed by the experiment which showed that an educational blog integrated in a foreign language teaching system contributed to optimization of the process of teaching and learning, development of foreign language communicative competence of students and thereby allowed them to acquire not only communicative but also technological skills.
APA, Harvard, Vancouver, ISO, and other styles
10

She, Ruifeng, and Yanfeng Ouyang. Generalized Link-Cost Function and Network Design for Dedicated Truck-Platoon Lanes to Improve Energy, Pavement Sustainability, and Traffic Efficiency. Illinois Center for Transportation, November 2021. http://dx.doi.org/10.36501/0197-9191/21-037.

Full text
Abstract:
Recent development of autonomous and connected trucks (ACT) has provided the freight industry with the option of using truck platooning to improve fuel efficiency, traffic throughput, and safety. However, closely spaced and longitudinally aligned trucks impose frequent and concentrated loading on pavements, which often accelerates pavement deterioration and increases the life cycle costs for the highway agency. Also, effectiveness of truck platooning can be maximized only in dedicated lanes; and its benefits and costs need to be properly balanced between stakeholders. This paper proposes a network-design model to optimize (i) placement of dedicated truck-platoon lanes and toll price in a highway network, (ii) pooling and routing of ACT traffic from multiple origins and destinations to utilize these lanes, and (iii) configuration of truck platoons within these lanes (e.g., lateral displacements and vehicle separations). The problem is formulated as an integrated bi-level optimization model. The upper level makes decisions on converting existing highway lanes into dedicated platoon lanes, as well as setting user fees. The lower-level decisions are made by independent shippers regarding the choice of routes and use of platoon lanes vs. regular lanes; and they collectively determine truck traffic in all lanes. Link-cost functions for platoon lanes are obtained by simultaneously optimizing, through dynamic programming, pavement-rehabilitation activities and platoon configuration in the pavement's life cycle. A numerical case study is used to demonstrate the applicability and performance of the proposed model framework over the Illinois freeway system. It is shown that the freight traffic is effectively channelized on a few corridors of platoon lanes and, by setting proper user fees to cover pavement-rehabilitation costs, systemwide improvements for both freight shippers and highway agencies can be achieved.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Performance optimization of rating system' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography