movements in rigid connections and damage to the joint surfaces

... speakers of all the language communities) to understand the environment, to act on the others in it, and also to interpret the relevance of the first two purposes interims of the topics under discussion ... page 80, showing the problems of theme selection (including kinds of predicator theme, adjunct theme, subject theme, non - wh theme, wh theme, etc); theme more clearly expressed in the use of mood ... schema and instance (making up hierarchies and polysemy network); the uses of S and I in phonology, in symbolic units; the different aspects of meaning including profile, base and domain and also...

Ngày tải lên: 28/03/2014, 11:20

... one at the broad index level in the E-Mini, the other with respect to individual stocks LIQUIDITY CRISIS IN THE E-MINI The combined selling pressure from the Sell Algorithm, HFTs and other traders ... strategies on May and other trading days were the E-Mini, SPY, and the basket of underlying stocks in the S&P 500 Index Consistent with the E-Mini’s very high trading volume, most of the interviewed ... entitled Preliminary Findings Regarding the Market Events of May 6, 2010 – Report of the Staffs of the CFTC and SEC to the Joint Advisory Committee on Emerging Regulatory Issues (the “Preliminary Report”).2...

Ngày tải lên: 19/02/2014, 03:20

... that: The role of learner as negotiator- between the self, the learning process, and the object of learning- emerges from and interacts with the role of joint negotiator within the group and within ... skills in deciding what to say and how to say it, while maintaining the intended relation with others 1.3.2 The characteristics of speaking According to Bygate, M (1985), in almost speaking, the ... administered to teachers who have been teaching English to the minority students at Son La Ethnic Boarding High School They were invited to join the study with the hope of finding out the teaching...

Ngày tải lên: 07/09/2013, 13:06

Ngày tải lên: 18/02/2014, 11:20

... Medicine" and 1st "Bedside -to- Bench" Awards are now history We are hopeful these Awards will serve to encourage other investigators devoted to improving the "bench -to- bedside" and "bedside -to- bench" ... immunity to tumour-associated antigens and thereby, represent a major obstacle to immunotherapy Thus, reducing their number or inhibiting their effector functions intuitively has the potential of increasing ... http://www.translational-medicine.com/content/7/1/57 swered issues in this emerging basic and clinical research area in animal models and man toward delineating, e.g., the relative effects of T cells and depletion...

Ngày tải lên: 18/06/2014, 15:20

... the 3rd “Excellence in Translational Medicine” and 2nd “Bedside -to- Bench” Awards are now history We are hopeful these Awards will serve to encourage other investigators devoted to improving the ... research Therein, they utilized real-time PCR for measurement of MxA mRNA, a marker for the response to IFN therapy, to monitor the presumptive unresponsiveness of ART in perinatally HIV-infected ... patients; and demonstrated that analysis of MxA may be a valuable tool for the management of ART in perinatal HIV-infection With congratulations to Hye-Won Chung [3] and to Raffaele Badolato and their...

Ngày tải lên: 18/06/2014, 16:20

... driven by the synthetic E/L promoter (black arrow in the bottom line) The resulting virus was designated VV Δ F2L-gfp and contained a deletion in F2L corresponding to amino acids 11–129 of the open ... the incorporation of uracil in their genomes These residues in DNA can arise either through misincorporation of dUTP by DNA polymerase or the spontaneous deamination of cytosine and can result in ... and a standard plaque reduction assay was used to evaluate the susceptibility of the dUTPase mutant and the parent virus The mutant remained fully sensitive to all of the drugs tested including...

Ngày tải lên: 20/06/2014, 01:20

... conventional thermal, hydro, and nuclear generation and wind power, such as different generation systems and the difficulty in controlling the primary movement of a wind turbine, due to the wind and its ... commercial wind turbine configurations Chapter contains the results of research activities in line to reduce both: the uncertainties in power forecasting and the lack in power quality for wind farms ... stator coils), • rotor current (heating of rotor coils), and • rotor voltage (limiting the rotor speed) The GSC could be used to control the reactive power and to improve the total reactive power...

Ngày tải lên: 20/06/2014, 05:20

... determined by the intersection point of the P- locus, the Q locus and the BL In other words, if the intersection point of the P-locus with the BL and the intersection point of the Q-locus with the ... loadability in the point of voltage collapse and increase in voltage stability margin define as the distance between the operational point and the point of voltage collapse Finally, column and 10 show the ... limited by PGmax at the bottom, then by QGmin, by Vmax at the right hand side, by PGmin, line capability and QGmax at the top, and by Vmin on the left hand side For a particular system the above limits...

Ngày tải lên: 20/06/2014, 05:20

... community In Europe the Agencies and Universities in the Northern countries have pioneered the study of power quality of wind turbines and the problems of their integration into the grid The collaboration ... to the fact that the speed of the incident wind on the turbine increases with the height (Thiringer & Dahlberg, 2001) The growth law depends on factors such as the roughness of the terrain, the ... to use Therefore, it can also be a useful tool for on-line monitoring and control of power system containing wind farms or any other renewable energy resource Relying on the information and indicators...

Ngày tải lên: 20/06/2014, 05:20

... point (offshore) to the point of common coupling (onshore), in other words, the physic medium to transfer the energy from the wind farm to the main grid and all the support devices The transmission ... different in function of its location in the inter-turbine grid, i.e there is not the same equivalent impedance at the output of the 25th wind turbine and at the output of the 30th wind turbine 84 Wind ... of the harmonic voltage source inside the inter turbine grid For the 25th wind turbine (black) and for the 30th wind turbine (red): (a) more detail in the main resonance and (b) more detail in...

Ngày tải lên: 20/06/2014, 05:20

... power to wind-main The new transmission line Main-Wind will reverse the active power flowing from Main towards Wind originally at 6.60 MW to a new flow towards Main at 10 72 MW Whereas the transmission ... distribution and utilization Deregulated markets are imposing further demands on generating plants, increasing their wear and tear and the likelihood of generator instabilities of various kinds To help to ... (penalty/bonus) to wind producers An interesting schema for the wind energy management can be a coupling of wind generators and storages Naturally, there are multiple varieties of wind generator and storage...

Ngày tải lên: 20/06/2014, 05:20

... offers and demand loads, the best compromise towards the power demand and the amount of energy to be delivered This is to minimize the total operating costs while ensuring the safe operation of the ... It seeks to determine the maximum and minimum storage basins at specific times The horizon of anticipation to be considered has to suit the storage capacity, the wind power capacity and the quality ... binary), Linear Programming extends to the Mixed Linear Programming (MLP) or Integer Linear Programming (ILP) In the following, we use the name "PML" The general expression of the PML is: Minimize:...

Ngày tải lên: 20/06/2014, 05:20

... that the control system has to maintain the output power value to the nominal value of the generator The torque at the turbine shaft neglecting losses in the drive train is given by (Iyasere et ... load, the diesel engine is disconnected from the induction generator The Power Electronic Interface (PEI) connecting the load to the main bus is used to fit the frequency of the power supplying the ... well as the generated power out of the wind turbine If, however, the rotor speed is adjusted according to the wind speed variation, then the tip-speed ratio can be maintained at an optimal point,...

Ngày tải lên: 20/06/2014, 05:20

... manages to damp the torsional oscillations in the drive train and ensures safe operation of the wind turbine Compared to the results from the ASIG wind farm above, the fast deviations in the wind ... out in order to illustrate and evaluate the fluctuations that occur in the generator speed and the power of wind turbines in the presence of a turbulent wind The attention is also drawn to the ... that the total gain of the system remains unchanged for all the operating points of the wind turbine 3.2 Simulation results In the following, the emphasis is made on the secure operation of the...

Ngày tải lên: 20/06/2014, 05:20

... reestablishes in the DFIG wind turbines the intrinsic characteristic of the fixed speed ASIG wind turbines, thus, using the kinetic energy accumulated in the rotor mass to support the grid during frequency ... time that the wind turbine is able to provide with rated active power when decelerating the rotor from the nominal speed down to zero using only the available kinetic energy in the rotor mass, ... these two wind farms produce in total 15 MW – 9% of the total demand In the same figure, the results for Droop control implemented in the wind farm level or the wind turbine level are included...

Ngày tải lên: 20/06/2014, 05:20

... will introduce high disturbance into the electric systems by increasing the risk of instability This risk can be avoided by increasing the spinning reserves; that is, by increasing the cost of the ... the feedback innovation term to correct the states of bias The TSO block is mainly a logger of the power feed to the grid It detects the in band and out band states according to the Δ parameter, ... rate in the storage phase, Eout is the rate in the energy recovery phase ˙ and Eloss is the rate of energy lost in the storage itself The increase in the stored energy is the following when E

Ngày tải lên: 20/06/2014, 05:20

... Rotor Speed Response of induction Generator with SVC/STATCOM There are no significant rotor speed oscillations in the rotor speed of the induction generator with SVC in the network; however the ... model to estimate the next ten-minute ahead production level for a hypothetical wind farm and investigate the possibility of pairing wind output with responsive demand to reduce the variability in ... Wind Farm – Impact in Power System and Alternatives to Improve the Integration This transformation is used in both the fitting and prediction processes The histograms of wind speed signals in...

Ngày tải lên: 20/06/2014, 05:20

... influence the fluctuations in the power of the wind turbines The wind acting on the rotor plane of a wind turbine is very complex and includes both deterministic effects (mean wind, tower shadow) and ... the conversion of wind power (PWIND) into mechanical (PMEC) and thereafter into electrical power (PEL) Fig Rotor wind speed and hub wind speed model The interaction of the turbine with the wind ... out of the wind Conversely, the blades are turned back into the wind whenever the wind drops again The rotor blades thus have to be able to turn around their longitudinal axis (to pitch) During...

Ngày tải lên: 20/06/2014, 05:20

... Alternatives 1, and exceed 50 SM/yr in Stage Alternatives 1, and were, therefore, eliminated from the candidate planning list due to their inability to meet the designated Pc value in the first planning ... Buses 16, 18 and 21, and 2×50 MW and 1×155 MW generating units were added at Bus 22 and Bus 23 respectively The rating of Line 10 was increased to 1.1 p.u of the original rating The total number ... enhance the controller’s capabilities to handle grid faults Another interesting issue is to explore the present controllers in the design of a whole wind farm and the connection of the wind farm...

Ngày tải lên: 20/06/2014, 05:20