Evaluation Of Large-scale Systems Research Articles

Integrated Speed Harmonization and Platooning of Connected Automated Vehicles: Model Development and Large-Scale System Evaluation

Integrated Speed Harmonization and Platooning of Connected Automated Vehicles: Model Development and Large-Scale System Evaluation

Techno-economic system analysis of membrane distillation process for treatment of chemical mechanical planarization wastewater in nano-electronics industries

Membrane distillation (MD) is a promising separation technology for the treatment of chemical mechanical planarization (CMP) wastewater releasing from nano-electronics industries. In order to determine the feasibility of the process at industrial scale, the most important factors are large-scale system evaluation and related economics. Since membrane distillation is a thermally driven process, therefore, different integration possibilities between an air gap membrane distillation (AGMD) system and low-grade heat sources are identified and analyzed in this work. Global mass and energy balances are conducted around AGMD system for CMP wastewater treatment in a typical nano-electronics manufacturing facility. It is determined that around 100 GWh of thermal energy can be readily recovered via internal sources and reused to treat 120,000 m3 CMP wastewater/year with MD feed temperature of 80 °C. Along with the technical feasibility of the system, the detailed economic evaluation has also been performed. Annual capital investment and operating cost showed that the expected CMP wastewater treatment cost can be as low as 3 $/m3, which is estimated to be nearly 95% lower than the wastewater treatment cost using electro-chemical systems.

Probabilistic ranking of large scale transmission projects

The purpose of this investigation is to determine an appropriate way of probabilistically prioritizing transmission system alternatives. Three approaches widely exercised by different electric utilities are studied and compared to the methodology proposed and developed in this paper. Utilizing the appropriate methodology, transmission system alternatives are prioritized and the best alternative is placed on the top of a ranking table. An analysis of qualitatively identifying the different transmission system benefits is performed. Some of the qualitative benefits are quantified and used in our methodology. The proposed methodology is tested on the IEEE 25 bus reliability test system (RTS). TRELSS (transmission reliability evaluation of large scale systems), a software package developed by Electric Power Research Institute (EPRI) is utilized in determining the probabilistic indices that are used in the proposed approach.

Issues in the evaluation of picture archiving and communication systems

Picture archiving and communication systems (PACS) are an example of the application of computer technology in the medical field. PACS automates image handling in a hospital and has the potential to transform the way radiology is currently performed. This paper focuses on the evaluation of the PACS technology, and considers the claims that have been made for PACS, how these claims might be turned into questions to be addressed by evaluation and the appropriate methods for the evaluation of PACS. A distinction is drawn between evaluation questions for which the hospital is the appropriate focus and those for which the patient is the appropriate focus. The preferred research design is different for hospital focused PACS evaluation and patient-focused evaluation of small scale PACS systems. A contemporaneous experimental comparison within hospitals is the preferred design for the patient-focused evaluation of small scale PACS systems. The patient-focused evaluation of large scale systems and the hospital-focused evaluation of all PACS systems could feasibly be conducted as contemporaneous experimental comparisons between hospitals but the large research costs implied by such a design almost certainly mean that non-contemporaneous, nonexperimental comparisons within hospitals are more realistic. The current situation for the PACS technology is that it has potential, but as yet unproven, benefits and a large capital cost. Thus, the primary purpose of funding additional PACS implementations must be to add to the currently small body of evaluation evidence.

On a class of limit reliability functions for series-parallel and parallel-series systems

In the reliability investigation of large-scale systems, the problem of the complexity of their reliability functions arises. This problem may be approximately solved by the assuming that the number of system components tends to infinity and finding the limit reliability function. This paper presents the solution of this problem and some applications. The classes of asymptotic reliability functions for series-parallel and parallel-series systems with identical and unlike components are presented. They are ten-element and more extensive than the known three-element classes of asymptotic distributions of maximum and minimum statistics of independent random variables with a common distribution function. The results may be useful in the reliability evaluation of large scale systems.