Showing 25 pages using this property.
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| Fixed System parameter + | Parameter which describes the system and remains unchanged. It is neither modified by the solver nor in scenarios. |
| Fixed external parameter + | Dimension which affects the system and which is unchanged. |
| Flash drive + | 1. A flash drive is a small, ultra-portable storage device which, unlike an optical drive or a traditional hard drive, has no moving parts., 2. A flash driveis a small data storage device that uses flash memory and has a built-in USB connection. Flash drives are typically no more than two to three inches in length and less than an inch in width. Flash drives are also very thin, often having a depth of less than a centimeter. Because of their small form factor, they are highly portable. |
| Flexibility + | capability of a dispatchable sink or source of electricity to adopt the active power consumption or generation according to an input variable., Note to entry: In many cases flexibility is understood as price elasticity, but it is also possible to have an elastic response according to technical input variables such as frequency, voltage or current. |
| Forecast + | 1. A forecast is the result of forecasting describing "the process of making predictions of the future based on past and present data and analysis of trends." |
| Framework + | 1. A software framework is a universal, reusable software environment that provides particular functionality as part of a larger software platform to facilitate development of software applications, products and solutions. |
| Framework Factsheet + | 1. Factsheets for frameworks |
| Fuzzy logic + | 1. fuzzy sets (Mengen) model concepts and objects in the real world. advantage of the fuzzy logic is, to categorize data in the set (Menge) (oposite: binary logic with crisp boundary or values). A fuzzy set is a collection of related items which belong to that set to different degrees. Information from fuzzy sets can combinded using rules to make decisions., fuzzy ruels take partially true facts, finds out to what degree they are true. |
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| Game Theoretic Model + | A study of mathematical models of conflict and cooperation between intelligent rational decision-makers. The game theoretic model is mainly used in economics, political science, and psychology, as well as logic, computer science and biology. Originally, it addressed zero-sum games, in which one person's gains result in losses for the other participants. The Game theoretic model applies to a wide range of behavioral relations, and is now an umbrella term for the science of logical decision making in humans, animals, and computers. |
| Gas sector + | 1. Covers all areas that deal with gas (sources, processing, transport, storage, uses) |
| Generic System + | Set of all possible components which can be considered in a given system |
| Geodata + | 1. Information about geographical location held in a digital format., 2. Computerized geographical data. |
| Geodatabase + | 1. A geo-database is part of a geo-information system (GIS). It collects spatial data, which can be used later for analysis and presentation. The essential basis of each geo-database is the object-rela- tional data model usual for such systems. In a digital way, this maps space-related data, processes and objects, and converts these into the corresponding relations., 2. A geodatabase is a database designed to store, query, and manipulate geographic information and spatial data. It is also known as a spatial database. |
| Geographic Coordinate System + | 1. A geographic coordinate system is a three-dimensional reference system that locates points on the Earth's surface. The unit of measure is usually decimal degrees. A point has two coordinate values: latitude and longitude. Latitude and longitude measure angles., 2. A geographic coordinate system (GCS) uses a three-dimensional spherical surface to define locations on the earth. A GCS is often incorrectly called a datum, but a datum is only one part of a GCS. A GCS includes an angular unit of measure, a prime meridian, and a datum (based on a spheroid). |
| Geographic Information System + | 1. A geographic information system (GIS) is a system designed to capture, store, manipulate, analyze, manage, and present spatial or geographic data. GIS applications are tools that allow users to create interactive queries (user-created searches), analyze spatial information, edit data in maps, and present the results of all these operations. Since many kinds of data have important geographic aspects, a GIS can have many uses: weather forecasting, sales analysis, or population forecasting., 2. A GIS enables you to envision the geographic aspects of a body of data. Basically, it lets you query or analyze a database and receive the results in the form of some kind of map., 3. QGIS is a free and open source Geographic Information System, with which you can create, edit, visualize, analyse and publish geospatial information. QGIS is licensed under the GNU General Public License. It supports numerous vector, raster, and database formats and functionalities., 4. QGIS (previously known as Quantum GIS) is a cross-platform free and open-source desktop geographic information system (GIS) application that supports viewing, editing, and analysis of geospatial data. |
| Geometry (data type) + | 1 "geom" or sometimes "the_geom" is used to indicate a database column including the geotagged information. |
| Global radiation + | 0. Global radiation is the total short-wave radiation from the sky falling onto a horizontal surface on the ground. It includes both the direct solar radiation and the diffuse radiation resulting from reflected or scattered sunlight., 1. the process in which energy is emitted as particles or waves., 2. The complete process in which energy is emitted by one body, transmitted through intervening medium or Space, and absorbed by an other body. |
| Graphical User Interface + | 1. The graphical user interface (GUI), is a type of user interface that allows users to interact with electronic devices through graphical icons and visual indicators such as secondary notation, instead of text-based user interfaces, typed command labels or text navigation., 2.A graphical user interface (GUI) is a human-computer interface (i.e., a way for humans to interact with computers) that uses windows, icons and menus and which can be manipulated by a mouse (and often to a limited extent by a keyboard as well). |
| Grey box testing + | 1. Gray Box Testing is a software testing method which is a combination of Black Box Testing method and White Box Testing method. In Black Box Testing, the internal structure of the item being tested is unknown to the tester and in White Box Testing the internal structure in known. In Gray Box Testing, the internal structure is partially known. This involves having access to internal data structures and algorithms for purposes of designing the test cases, but testing at the user, or black-box level., 2. Gray Box testing refers to the technique of testing a system with limited knowledge of the internals of the system. Gray Box testers have access to detailed design documents with information beyond requirement documents. Gray Box tests are generated based on information such as state-based models or architecture diagrams of the target system, Advantages:, Offers Combined Benefits – Leverage strengths of both Black Box and White Box testing wherever possible., Non Intrusive – Gray Box does not rely on access to source code or binaries. Instead, based on interface definition, functional specifications, and application architecture., Intelligent Test Authoring – Based on the limited information available, a Gray Box tester can author intelligent test scenarios, especially around data type handling, communication protocols and exception handling., Unbiased Testing – The demarcation between testers and developer is still maintained. The handoff is only around interface definitions and documentation without access to source code or binaries., Disadvantages:, Partial Code Coverage – Since the source code or binaries are not available, the ability to traverse code paths is still limited by the tests deduced through available information. The coverage depends on the tester authoring skills., Defect Identification – Inherent to distributed application is the difficult associated in defect identification. Gray Box testing is still at the mercy of how well systems throw exceptions and how well are these exceptions propagated with a distributed Web Services environment. |
| Grid + | 1. A grid is a network of transmission lines, pipes, etc, by which electricity, gas, or water is distributed |
| Grid district + | 1. An area that contains a subnetwork. |
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| Half Life + | 1. The half-life of a radioactive substance is a characteristic constant that measures the time it takes for a given amount of the substance to become reduced by half as a consequence of decay, and therefore, the emission of the radiatiom, 2. The biological half-life or terminal half-life of a substance is the time it takes for a substance (for example a metabolite, drug, signalling molecule, radioactive nuclide, or other substance) to lose half of its pharmacologic, physiologic, or radiologic activity. In a medical context, half-life may also describe the time it takes for the blood plasma concentration of a substance to halve (plasma half-life) its steady-state |
| Heat sector + | Covers all areas that deal with heat (heat generation, heat storage, heat usage). |
| High Temperature Conditions + | 1. A standard for testing and sorting of photovoltaik modules focused on the temperature and irradiation data, given by the International Electrotechnical Commission (IEC). By using this standard a comparison of the modules will be more accurately. These test conditions are: Air Mass 1.5g,Celltemperature 75°C and irradiation of 1000 W/m²., 2. Geared to testing panel performance at higher temperature levels, the High Temperature Conditions (HTC) specifies testing at irradiance of 1000W/ m², 75°C module temperature, an air mass AM of 1.5 and zero wind speed. |
| Hot Spot + | 1. An undesirable phenomenon of PV device operation whereby one or more cells within a PV module or array act as a resistive load, resulting in local overheating or melting of the cell(s)., 2. A hot-spot consists of a localized overheating in a photovoltaic module. It appears when, due to some anomaly, the short circuit current of the affected cell becomes lower than the operating current of the whole, giving rise to reverse biasing, thus dissipating the power generated by other cells in the form of heat. |
