29,669 research outputs found
On the Design of Campus Parking Systems with QoS guarantees
Parking spaces are resources that can be pooled together and shared,
especially when there are complementary day-time and night-time users. We
answer two design questions. First, given a quality of service requirement, how
many spaces should be set aside as contingency during day-time for night-time
users? Next, how can we replace the first-come-first-served access method by
one that aims at optimal efficiency while keeping user preferences private
Forecasting Recharging Demand to Integrate Electric Vehicle Fleets in Smart Grids
Electric vehicle fleets and smart grids are two growing technologies. These technologies
provided new possibilities to reduce pollution and increase energy efficiency.
In this sense, electric vehicles are used as mobile loads in the power grid. A distributed
charging prioritization methodology is proposed in this paper. The solution is based
on the concept of virtual power plants and the usage of evolutionary computation
algorithms. Additionally, the comparison of several evolutionary algorithms, genetic
algorithm, genetic algorithm with evolution control, particle swarm optimization, and
hybrid solution are shown in order to evaluate the proposed architecture. The proposed
solution is presented to prevent the overload of the power grid
Blockchain Application - Case Study on Hyperledger Fabric
Usalduse keskkonna saamiseks kasutatakse kolmandaid osapooli ja nende tarkvara platvorme. Plokiahela tehnoloogia ja nutikaid lepingud on üks võimalus, kuidas välistada kolmas osapool. Üks viimased turule tulnud vabatarkvara platvorme on Hyperledger Fabric - modulaarne süsteem, mis kasutab üldkasutavaid programmeerimskeeli nutikate lepingute keelena. See avardab platvormi kasutamist ettevõtte tarkvara loomisel. Võrdleme platvormi tavapäraste lahendustega ning uurime väljakutseid, mida pakub uus plokiahela põhine süsteem ja selle jaoks loodud nutika leping nimega chaincode. Selle töö käigus realiseeriti parkimiseks mõeldud rakendus, mille nutikas leping on kirjutatud Go programmeerimiskeeles.Töö käigus realiseerisime prototüübi, leidsime lahendused tehnilistele probleemidele, realiseerisime kasutusjuhud.To enable software platform to be used without a third trusted party, one of the possibilities is to use blockchain and smart contracts. One of the latest platform is open-source Hyperledger Fabric, a modular system that uses conventional programming languages for smart contracts. This opens up vast possibilities for using it product centric enterprise systems. In this paper we compare the platform to a conventional solution and study the challenges provided by the smart contract called chaincode. We implement a parking spot application for multisided market using smart contract and Go programming language. In the end we have a working prototype with solutions to technical problems, covering predetermined use cases
Regional Data Archiving and Management for Northeast Illinois
This project studies the feasibility and implementation options for establishing a regional data archiving system to help monitor
and manage traffic operations and planning for the northeastern Illinois region. It aims to provide a clear guidance to the
regional transportation agencies, from both technical and business perspectives, about building such a comprehensive
transportation information system. Several implementation alternatives are identified and analyzed. This research is carried
out in three phases.
In the first phase, existing documents related to ITS deployments in the broader Chicago area are summarized, and a
thorough review is conducted of similar systems across the country. Various stakeholders are interviewed to collect
information on all data elements that they store, including the format, system, and granularity. Their perception of a data
archive system, such as potential benefits and costs, is also surveyed. In the second phase, a conceptual design of the
database is developed. This conceptual design includes system architecture, functional modules, user interfaces, and
examples of usage. In the last phase, the possible business models for the archive system to sustain itself are reviewed. We
estimate initial capital and recurring operational/maintenance costs for the system based on realistic information on the
hardware, software, labor, and resource requirements. We also identify possible revenue opportunities.
A few implementation options for the archive system are summarized in this report; namely:
1. System hosted by a partnering agency
2. System contracted to a university
3. System contracted to a national laboratory
4. System outsourced to a service provider
The costs, advantages and disadvantages for each of these recommended options are also provided.ICT-R27-22published or submitted for publicationis peer reviewe
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