7,498 research outputs found
A power engineering and renewable energy engineering training facility utilising SMA’s Sunny Island Inverter
Get PDFMurdoch University’s engineering department has conceptualised the development of a training system for renewable energy and power engineering students based upon SMA’s Sunny Island inverter. The inverter operates using the droop control algorithm in which the control of real power flows alters network frequency and the control of reactive power flows alters the network voltage. By controlling the network frequency, the Sunny Island inverter is able to control the real power flows of other AC coupled inverters on the network. The system provides a simple, safe and localised learning tool whereby students are able to understand and interact with the system to understand the similarities in operation between the Sunny Island network and a large electricity network. The conversion of the existing system to a Sunny Island system involved the redesign and reconfiguration of a number of existing components in order to ensure compatibility with the new Sunny Island network. A number of compatibility issues were addressed and solutions presented to maximise the use of existing components and implement changes which allow a fully functional system in the future. A monitoring system was required to maximise the educational value of the system and enhance the visualisation of the Sunny Island’s operational characteristics. It was determined that SMA’s monitoring equipment was not capable of the sample rates required to detect transients in the AC network. A second monitoring system has been proposed utilising high-speed data acquisition equipment that is able to monitor at approximately 100 samples per cycle. This report sets a precedent for future work related to the training system’s physical development and allows for the continued development of the system into a fully-equipped Sunny Island system which is equipped with photovoltaic, wind and diesel generators; and whose operation can be visualised through the associated monitoring system
A Remote Area Power Supply (RAPS) Training Facility utilising SMA Sunny Island Inverter technology and National Instruments measurement package
Get PDFRAPS systems can sometimes be a cheaper alternative for supplying power than connection to a distant utility. Most assuredly it is a cleaner method of producing electricity than coal or gas constituents, provided the diesel generator is used minimally. A modern RAPS system will generally have several sources of generation, typically they might be; solar, wind and a diesel/petrol generator coupled with a battery to store excess power. The RAPS 2 system at Murdoch University was selected for an overhaul early in 2010. The system was redesigned to include new inverter technology from SMA. The new system relies on 3 separate inverters to convert the sources directly into grid quality electricity, as opposed to some traditional RAPS systems that would have most of its elements feed a DC bus that connected to a single inverter. This novel way of setting up a mini grid finds its niche in situations when the terrain or meteorological conditions make it impractical to have generation equipment all localised and a DC bus would have higher associated cable losses.
For such a system to be of educational benefit to tertiary students, the variables within the system must be able to be monitored. To this end an advanced measurement system has been designed and procured so that every measurable point in the upgraded system is available for display.
The measurement system was designed using National Instruments compact DAQ (data acquisition) hardware, one of the first of its type to be introduced to the university. The compact DAQ unit has been coupled with isolation equipment supplied by Dataforth, which already has an existing prevalence throughout the engineering department. The subsequent measurement program monitors 31 system variables at a high sampling rate to provide real time information on the state of the system. The measurement program also monitors relevant meteorological aspects such as the solar irradiance and local wind speed.
This report documents and details the steps taken to set up a new and novel RAPS system. Discussed are the approaches taken throughout the semester to project manage and facilitate progress. A detailed description is also given of the measurement and protection system that has been designed to allow students and the general public to get a good grasp on the performance of the system
Q&A on Sunny Singh’s short story A Cup Full of Jasmine Oil
No full textWith its rich semantic texture and evocative imagery Sunny Singh’s short story A Cup Full of Jasmine Oil invites various readings. The story tells how a young girl is both attracted and confused when her grandmother’s neighbor, who lives in a lesbian relationship, massages her skull and oils her curly hair. When the grandmother at one point forbids the oiling sessions, the girl suddenly becomes aware of hidden meanings and intuitions associated with this practice. The essay juxtaposes a reading of the story from a more conventional western perspective with an interpretation from the point of the Indian system of aesthetics based on rasa. From this double perspective, it discusses various stylistic and thematic aspects of the story. Diverging interpretations are presented of the role of the characters, the functionality of their characterization, and the use of description and suggestion to evoke the semantic framework of the story. The juxtaposition of two readings was prompted by a discussion with the author during a conference panel on rebellion in modern Indian literature and film. To prevent the impression of imposing a “scholarly” reading on a more “intuitive” reading, the essay continues the dialogue with the author and invites her to react to the reading and discuss the notion of an “Indian” aesthetic model, its relevance for her writing, and current critical approaches to modern Indian fiction. In her response, Sunny Singh explains how the theme of the story was prompted by her perception of the sharing of knowledge of sexuality and intimacy in a tightly-knit Indian social context. The discussion with the author extends beyond the specific story, and she presents her views on how her scholarly knowledge of modern Indian culture stimulates her in her creative work. Thereby, it aptly frames the exploration of a reading of A Cup Full of Jasmine Oil from the perspective of Indian literary aesthetics
sunny-as2: Enhancing sunny for algorithm selection
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SUNNY is an Algorithm Selection (AS) technique originally tailored for Constraint Programming (CP). SUNNY is based on the k-nearest neighbors algorithm and enables one to schedule, from a portfolio of solvers, a subset of solvers to be run on a given CP problem. This approach has proved to be effective for CP problems.
In 2015, the ASlib benchmarks were released for comparing AS systems coming from disparate fields (e.g., ASP, QBF, and SAT) and SUNNY was extended to deal with generic AS problems. This led to the development of sunny-as, a prototypical algorithm selector based on SUNNY for ASlib scenarios. A major improvement of sunny-as, called sunny-as2, was then submitted to the Open Algorithm Selection Challenge (OASC) in 2017, where it turned out to be the best approach for the runtime minimization of decision problems.
In this work we present the technical advancements of sunny-as2, by detailing through several empirical evaluations and by providing new insights. Its current version, built on the top of the preliminary version submitted to OASC, is able to outperform sunny-as and other state-of-the-art AS methods, including those who did not attend the challenge.


Sunny Hanover
No full textBlack and white photo of chestnut gelding, Sunny Hanover, Day up after the first heat of the E. J. Record, Grocier 2.19 Trot at the Oxford County Fair, South Paris, Maine, September 12, 1935.https://digitalcommons.library.umaine.edu/kendall_images/2374/thumbnail.jp
Sunny Skies
No full textSunny SkiesTo order a reproduction, inquire about permissions, or for information about prices see:
http://www.lib.washington.edu/specialcollections/services/reproduction/reproduction
Please cite the Order NumberScanned at 600ppi with an Epson 20000 flatbed scanner. Image then rotated, cropped, level-adjusted, and sharpened using Photoshop CS3. Converted to a JPEG2000 image upon ingest into CONTENTdm
SUNNY for algorithm selection: A preliminary study
No full textGiven a collection of algorithms, the Algorithm Selection (AS) problem consists in identifying which of them is the best one for solving a given problem. In this paper we show how we adapted the algorithm selector SUNNY, originally tailored for constraint solving, to deal with general AS problems. Preliminary investigations based on the AS Library benchmarks already show some promising results: for some scenarios SUNNY is able to outperform AS state-ofthe-art approaches
Mammy's little sunny honey boy [music] : a dreamy waltz lullaby /
No full textFor voice and piano.; Caption title.; Copyright 1921 by Leo Feist Inc., ... New York.; Portrait of singer Mona Thomas on cover.; "Song hit in J. & N. Tait and Bailey & Grant's pantomime Sinbad the sailor."; Covers vary.; Also available online http://nla.gov.au/nla.mus-an6089864; MUS: N, MUSM 114023/1983 ; A, MUS/E88/152 ; N2, MUSM 142235.Sinbad the sailor (Pantomime) Mammy's little sunny honey boy
Sunny: Arizona State University's Chatbot for Students
No full textabstract: Next year, Arizona State University is launching a chatbot that will place their knowledge and services right into the palms of their students’ hands. Currently named Sunny, this virtual assistant will be able to answer questions regarding all aspects of college life, from orientation to housing, financial aid, schedules, intramurals, and more. Over the last semester, I have met with members of the Sunny development team to discuss their design and implementation plans. With their information plus a bit of outside research, I was able to combine several frameworks and technologies to build a prototype for Sunny. Prototypes allow developers to evaluate their designs early on, giving them ample time to make any necessary adjustments. I am confident that the Sunny development team will be able to learn from my basic implementation, from its triumphs and failures, to create the best possible chatbot for the students attending Arizona State University
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