most recently discovered planet in solar system

... time on the main sequence) of about 10 billion years The T-Tauri Stage The conspicuous absence of gas between the planets in the solar system must be explained in any model of solar system formation ... Tauri stage in its early evolution, and that the volatile elements in the inner solar system were blown away during this stage 1.4 Planetary Formation Condensation and Cooling The most widely ... necessary to take an inventory of the various sources of energy in the system These include the kinetic energy of impacting projectiles, the potential energy of infalling material to the planetary surface

Ngày tải lên: 04/12/2015, 00:25

... need in seconds with JUST THE FACTS! INFORMATION AT YOUR FINGERTIPS INFORMATION AT YOUR FINGERTIPS INFORMATION AT YOUR FINGERTIPS INFORMATION AT YOUR FINGERTIPS INFORMATION AT YOUR FINGERTIPS INFORMATION ... timeline THE SUN 12 • Where in the solar system? • Star Profile • Structure and layers • Flares and prominences • Solar wind • Photosphere • Sunspots • Sun timeline MERCURY 14 • Where in the solar ... the biggest planet in the solar system It is a vast planet of swirling gases and storms of unimaginable fury As the fifth planet out, it is the nearest gas giant, a planet made almost completely

Ngày tải lên: 25/12/2013, 16:35

... examined a variety ofissues related to both formal and informal education, including the incorpo-ration of solar and space physics content in science instruction at all levels,the training of solar ... the solar wind The realm of thesolar wind, which includes the entire solar system, is called the heliosphere In the broadest sense, the heliosphere is a vast interconnected system offast-moving ... supporting opticalIncoherent Scatter and other ground-based instruments for continuous Radar measurements of magnetosphere-ionosphere interactions. 3 L1 Monitor Continuation of solar-wind and interplanetary

Ngày tải lên: 05/03/2014, 11:21

... need in seconds with JUST THE FACTS! INFORMATION AT YOUR FINGERTIPS INFORMATION AT YOUR FINGERTIPS INFORMATION AT YOUR FINGERTIPS INFORMATION AT YOUR FINGERTIPS INFORMATION AT YOUR FINGERTIPS INFORMATION ... timeline THE SUN 12 • Where in the solar system? • Star Profile • Structure and layers • Flares and prominences • Solar wind • Photosphere • Sunspots • Sun timeline MERCURY 14 • Where in the solar ... the biggest planet in the solar system It is a vast planet of swirling gases and storms of unimaginable fury As the fifth planet out, it is the nearest gas giant, a planet made almost completely

Ngày tải lên: 16/03/2014, 15:20

... surrounding ice while maintaining the liquid body at the freezing point In a subsurface ocean overlain by a floating ice shell, the tendency of warm liquid to rise and cool liquid to sink will pin ... to interplanetary cruise; and the characteristics of the planetary destination, either in orbit or within the planetary environment, dictate the remaining factors The example calculation in ... contaminating planetary bodies of interest The 10-4 contamination criterion can be traced back to a COSPAR resolution promulgated in 1964 concerning “any spacecraft intended for planetary landing

Ngày tải lên: 22/03/2014, 09:20

... Mediator proteins) is included in the reaction In con-trast, the TATA binding protein-associated factors had no effect on transcriptional activation in our Sc pombe system These results indicate that ... activator protein (lane 11), indicating that the Mediator is involved in activated transcription Neither the inclusion of human recombinant TFIIA nor the Gal4 DNA binding domain had an effect ... centrifugation, and the insoluble pellet containing the recombinant protein was washed twice with buffer A containing 0.05% (v/v) sodium deoxycholate and 0.1% (v/v) Triton X-100 Recombinant proteins were extracted

Ngày tải lên: 30/03/2014, 14:20

... walking a single step and hiking across the state of Indiana! These five planets are not a part of the unchanging starscape background They’re part of our solar system Everything in the solar system—planets ... out to be a new planet The planet, named Uranus, was the first planet to be discovered in all of recorded human history Once Herschel had discovered a seventh planet in the solar system, astronomers ... and allthe other planets and the Sun orbit around it Ptolemy explained the wandering paths of theplanets by claiming that these planets movedaround in their own mini-orbits within differentlayers

Ngày tải lên: 01/04/2014, 20:21

... pri- on protein in TSEs The Nobel Assembly at the Karolinska Institute in Stockholmhas recognized the “unwavering” Prusi-ner for finding “a new biological princi-ple of infection.” The insight might ... a holding at con-a certcon-ain price, functions con-as con-a kind ofinsurance policy against a decline in themarket value of an investor’s assets Using options to hedge against tuations in the ... scientific and engineering questions remain-as well remain-as gaining a firmer grremain-asp of theeconomics of this approach, which re-mains one of the biggest uncertainties at present In our most optimistic

Ngày tải lên: 12/05/2014, 15:33

... focused on intense flares, but as the solar minimum approaches, investigators will increasingly be interested in tiny mi-croflares, a clue to the corona’s heating mechanism The loops, arches and ... within minerals of the mantle Water may also have taken up residence in Earth’s dense iron core, which contains some rel-atively light elements, including, most probably, hydrogen The initial influx ... bring on heavy rains and to speed erosion, in the process pulling carbon dioxide out of the atmo-sphere and out of minerals Thus, Earth has a built-in thermostat that automati-cally maintains

Ngày tải lên: 12/05/2014, 16:27

... of a wind turbine existing in a wind farm Chapter 13 presents the application of a joint deterministic-probabilistic criterion for bulk system expansion planning in wind integrated systems A comparison ... in the specific interaction of wind turbines with the power system This book addresses a wide variety of issues regarding the integration of wind farms in power systems, from impact to modeling ... deterministic N-1, the basic probabilistic and the joint deterministic-probabilistic criteria is illustrated for a long-term composite system planning using a wind integrated test system Finally,

Ngày tải lên: 20/06/2014, 05:20

... potential of wind energy in most European countries, wind energy systems are being installed and the penetration levels of wind energy into the electrical power systems are increasing at high rates ... Results of GA Impact of Wind Farms in Power Systems 17 In Table it must be noted that increasing in reactive power capability of WF leads to an increase in the loadability of the system, and reduce ... loadability increase of the power system, maximum loadability in the point of voltage collapse and increase in voltage stability margin define as the distance between the operational point and the point

Ngày tải lên: 20/06/2014, 05:20

... presented in international publications the influence of such injection of energy over the power quality in the electrical power system. Since the concept of wind turbine employed at that time was mostly ... Speed Wind Turbines during Continuous Operation - European Perspective Carlos López and Jorge Blanes Universidad de León Spain 1. Introduction Since wind energy begun to have importance in ... online monitoring of the WF. Also, it can be a useful educational tool helping to gain insight of WF interaction with power systems. This chapter also presents a graphical method for determining

Ngày tải lên: 20/06/2014, 05:20

... of Wind Energy Converters with Fluctuating Turbine Torque Electrical Engineering in Japan, vol 153, Nº 4 Tande, J O (2002) Applying Power Quality Characteristics of Wind Turbines for Assessing ... out in the preceding sections, a submarine cable in PSCAD (Fig 4) is defined, based on the physic data of the cable shown in Table 1 with these modifications Then, using PSCAD software, its internal ... Assessments of emission limits for fluctuating loads in MV and HV power systems Larson A (1996) Flicker and Slow Voltage Variations from Wind Turbines Proc of the 7th International Conference on Harmonics

Ngày tải lên: 20/06/2014, 05:20

... connecting Main -Wind changes the flow direction of power to wind- main The new transmission line Main -Wind will reverse the active power flowing from Main towards Wind originally ... of the wind power according to the wind In the wind turbines, electricity generation is directly related to the wind speed The turbines convert wind energy into mechanical ... hydraulic turbines, steam turbines whose energy comes from the burning of coal, gas and nuclear fuel, gas turbines, or occasionally internal combustion engines burning oil. Interest in renewable

Ngày tải lên: 20/06/2014, 05:20

... continuous and discrete variables (integer or binary), Linear Programming extends to the Mixed Linear Programming (MLP) or Integer Linear Programming (ILP) In the following, we use the name "PML" ... the most important step in the operation system The objectives here are to define the plan of operation of all components in the system in subjecting to meet all the technical constraints in order ... is much higher in winter than in summer in cold countries and inverted trend in hot countries [GAR-06], [PET-97] A example of annual win energy statistic is given in the following figures Figure

Ngày tải lên: 20/06/2014, 05:20

... tracking algorithm for wind turbine systems, including a matrix converter (MC) has been presented (Barakati et al., 2009) A wind-generator (WG) maximum-power-point tracking (MPPT) system has also been ... turbine under low to medium wind speeds by tracking the desired pitch angle and rotor speed, when the wind turbine system nonlinearities structurally uncertain Concerning other studies, due to the ... errors in the DFIG of a wind turbine has again been presented (Bennouna et al., 2009) It is well known that observer based design is a very important problem in control systems Since in many

Ngày tải lên: 20/06/2014, 05:20

... Performance and Maintainance: A Survey of Failure in Wind Power Systems KTH school of Electrical Engineering, KTH: Sweden, 2006 Trang 6Intelligent Control of Wind Energy Conversion Systems 169 Schegner, ... treatment In several cases, such events have led in the past in smaller or even general black-outs These problems are becoming more intense due to the increasing penetration of wind power in the ... the system during transient instances As mentioned in the Introduction, non interconnected system, like the one used in this report as a study case, face the problem of significant variations in

Ngày tải lên: 20/06/2014, 05:20

... explained 4.1.1 Response of ASIG wind turbines in frequency events One of the most common wind turbine configurations in modern power systems is the standard fixed speed wind turbine based on induction ... wind turbines increases its active power output during the first seconds following the frequency drop, contributing to the system inertia On the other hand, the wind farm with DFIG wind turbines ... 27 Change in active power production during a frequency drop for the three main wind turbine configurations 4.1.2 Response of DFIG wind turbines in frequency events The DFIG wind turbine configuration,

Ngày tải lên: 20/06/2014, 05:20

... disturbance into theelectric systems by increasing the risk of instability This risk can be avoided by increasingthe spinning reserves; that is, by increasing the cost of the public electricity systems ... stability of a single wind turbine generator supplying an infinite bus through a transmission line was studied by developing the linearized model of the power system under different loading conditions ... J (2002) Dynamic modelling of wind farm grid interaction, Wind Engineering 26(4): 191–208. Haykin, S (1999) Neural Networs, Prentice Hall. Haykin, S (2001) Kalman Filtering and Neural Networks,

Ngày tải lên: 20/06/2014, 05:20

... presently working as Professor in the department of Electrical and Electronics Engineering, RMK Engineering College, Chennai. His area of research includes modeling of FACTS devices for power system ... studies, modeling of wind energy conversion systems for power system stability analysis. Email: nsksai@rediffmail.com Part 3 Modelling and Simulation of Wind Power System 11 Modeling Wind Speed ... Linear... use in different applications in power systems, e.g., wind power predictions, scheduling and investment decisions 259 Modeling Wind Speed for Power System Applications

Ngày tải lên: 20/06/2014, 05:20