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Unsupervised learning of transcriptional regulatory networks via latent tree graphical models

Gitter, A.; Huang, F.; Valluvan, R.; Fraenkel, E.; Anandkumar, A. (University of Jaffna, 2016)

Gene expression is a readily-observed quanti_cation of transcriptional activity and cellular state that enables the recovery of the relationships between regulators and their target genes. Reconstructing transcriptional ...

Learning loopy graphical models with latent variables: efficient methods and guarantees

Anandkumar, A.; Valluvan, R. (University of Jaffna, 2013)

The problem of structure estimation in graphical models with latent variables is considered. We characterize conditions for tractable graph estimation and develop efficient methods with provable guarantees. We consider ...

Modeling dynamic social networks with vertex evolution via latent graphical models

Valluvan, R.; Almquist, Z.W.; Anandkumar, A.; Butts, C.T. (University of Jaffna, 2012)

We here consider the problem of modeling network evolution with joint edge and vertex dynamics.It is natural to expect that the accuracy of vertex prediction strongly affect the ability to predict dynamic network evolution ...

Latent graphical model selection: efficient methods For locally tree-like graphs

Anandkumar, A.; Valluvan, R. (University of Jaffna, 2012)

Graphical model selection refers to the problem of estimating the unknown graphstructure given observations at the nodes in the model. We consider a challenging instance of this problem when some of the nodes are latent ...

Design of an Onshore Wave Energy Converter Device for Electricity Generation

Sangar, S.; Thiruvaran, T.; Aravinthan, V.; Thanatheeban, B. (THE INSTITUTION OF ENGINEERS, SRI LANKA, 2021)

Demand for renewable energy is growing faster due to its cleaner nature. Sri Lanka is blessed with renewable energy sources and, currently renewable electricity is mainly produced from hydro power, Solar and Wind. Since, ...

Design of an Onshore Wave Energy Converter Device for Electricity Generation

Sangar, S.; Thiruvaran, T.; Aravinthan, V.; Thanatheeban, B. (IESL, 2021)

Demand for renewable energy is growing faster due to its cleaner nature. Sri Lanka is blessed with renewable energy sources and, currently renewable electricity is mainly produced from hydro power, Solar and Wind. ...

Concepts to Maximize the Usage of Distribution Networks - Case study on Jaffna Peninsula Distribution System

Ravindran, N.; Rodrigo, W.D.A.S.; Prasad, W.D.; Atputharajah, A. (2018)

Usage of distribution networks are always a challenging task as it directly connected to the consumer loads, which are continuously varying. Under or over voltages are one of the major component that limits the expansion ...

Islanding Detection and Enhancement of Microgrid Performance

Pouryekta, A.; Ramachandaramurthy, K.; Mithulananthan, N.; Arulampalam, A. (IEEE, 2017)

Nowadays, renewable energy sources (RES) are widely used in the distribution system. Despite the advantages of RES in the system, they also introduce some problems such as unintentional islanding, protection concerns, ...

Study of Northern Province Medium Voltage Network Interconnection with the Sri Lankan Power Grid

Ananthasingam, A.; Shailajah, R.; Yoganathan, N.; Arunprasanth, S.; Atputharajah, A.; Fernando, M.A.R.M. (2016)

Interconnection of power systems will strengthen the power grid due to its inertia addition. However, interconnection of long distanced large loads and generating plants causes problems like voltage drops, line overloading, ...

Forecast Daily Night Peak Electric Power Demand in Sri Lankan Power System

Ananthasingam, A.; Atputharajah, A. (IEEE, 2015)

Electricity has become vital for day today life. Electricity consumption has enormously increased during the recent past. However it cannot be conveniently stored. Therefore, at every instant of time there should be a ...

Integrated solution for future transportation and power systems through wind-solar hybrid power plant with energy storage

Thananjeyan, S.; Arunan, S.; Thiruvaran, T.; Atputharajah, A.; Ramachandaramurthy, V.K. (2014)

This paper addresses integrated solutions with the energy storage, which plays multiple roles in applications in transportation and power systems. The proposed integrated and automated control concept for a battery charging ...

Development of Dynamic EV Load Model for Power System Oscillatory Stability Studies

Dharmakeerthi, C.H.; Mithulananthan, N.; Atputharajah, A. (2014)

The interest on electric vehicles growing as a sustainable alternative to fossil fuel driven vehicles. Even though there are a number of grid impact studies, only a scant attention has been paid to study the impact of EV ...

Sustainable development through green building concept In sri lanka

Bombugala, B.A.W.P.; Atputharajah, A. (2013)

The construction sector accounts for a large percentage of the world’s total energy consumption and green house gas emissions. One of the effective and intelligent initiatives in infrastructure sector is sustainable development ...

Methodology to find the load pattern of a lv distribution Feeder and optimal capacitor placement

Gajananan, A.; Fernando, M. A. R. M.; Atputharajah, A.; Karunarathna, C. A. B. (2011)

The problem of capacitor placement for loss reduction in distribution system has been researched well in the past. In this paper a concept has been developed to determine the load pattern of a distribution feeder. Then a ...

Incorporating Pumped Storage Power Plant in the Sri Lankan Electricity Sector

Vivekananthan, C.; Anparasan, M.; Arunprasanth, S.; Fernando, M. A. R. M.; Atputharajah, A.; Ratnayake, U. R. (2011)

Sri Lanka is anticipated to experience a coal dominant electricity sector within this decade with the introduction of planned large scale coal power plants. Developing Pumped Storage Power Plant (PSPP) would be one of the ...

Design of a Dynamic Reactive Power Compensator (DRPC) to Improve the Power Factor of a Load Center

Arunprasanth, S.; Bandara, R.W.K.M.R.K.D.; Tharaka, R.M.R.; Atputharajah, A.; Fernando, M.A.R.M.; Abeyrathna, S.G.; Navarathne, D.N.; Tennakoon, A.P.; Alagoda, S. (2011)

Power systems loads are very dynamic. Varying reactive power causes voltage fluctuation, line overloading, increase power transmission loss and voltage instability. To minimize these effects, the network operators charge ...

Selection of Optimized Mix of Generation Technologies for Hybrid Renewable Energy Power Plant in Sri Lanka

Ratneswaran, K.; Amalendran, J.; Kokulasingam, V.; Alex Angelito, R.; Wickramasinghe, A.; Fernando, S.; Vigneswaran, P.; Atputharajah, A.; Mithulananthan, N. (2010)

A renewable energy source based hybrid power plant has been proposed as an economical option for Eluvaithivu, an isolated Islet located close to the Jaffna peninsula in Sri Lanka. Eluvaithivu is a small islet with 130 ...

New project on hybrid renewable energy generation technology to Sri Lanka

Ratneswaran, K.; Amalendran, J.; Kokulasingam, V.; Alex Angelito, R.; Wickramasinghe, A.; Fernando, S.; Vigneswaran, P.; Atputharajah, A.; Mithulananthan, N. (2010)

Recent development in Sri Lanka will boost the electricity demand in near future. Extending national grid, especially for some islands, will cost more than installing renewable energy generation technologies. Justification ...

Green Energy For University Of Peradeniya Via Renewable Power Generation

Tharaka, R.M.R.; Ranatunga, M.G.H; Alahakoon, G.N.; Atputharajah, A.; Ekanayake, J.B. (2009)

Operations of DFIG with simplified rotor current reference model and solution to the recent grid code requirements

Tennakoon, A.P.; Atputharajah, A.; Leite, H.; Ekanayake, J.B.; Abeyratna, S.G. (2009)

The advancing technologies are boosting the wind turbine development rapidly and today the wind power generation has become a proven technology. However, still the research and development are motivated to go into further ...

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