calculations of short circuit currents in dc systems
IEC 60909 3 short circuit currents in three phase a c systems currents during two separate sim
... Figure Partial short- circuit currents in the case of a line-to-earth short circuit at tower n of an overhead line in the vicinity of station B Following Figure 2, the numbering of the towers has ... tower in the vicinity of a station " I k1 Initial line-to-earth short- circuit current " I kEE Initial short- circuit current in the case of two separate simultaneous line-toearth short circuits ... line-to-earth short- circuit currents during two separate simultaneous line-to-earth short circuits .23 Partial short- circuit currents flowing through earth in the case of an unbalanced short circuit...
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transformer substaions theory and examples of short circuit calculations
... of the flux, mainly because of the different path of the magnetic lines Besides, there is not a single circuit and a single inductance, but more inductances (of the winding of the armature, of ... the function of protection against instantaneous short- circuit I3 is set in OFF The first step is to analyze the settings of the LV main circuit- breaker The protection settings of these devices ... length in meters [m] Ikmin minimum short- circuit current at end of cable If, in the formulas above, the value Ikmin is replaced by the tripping threshold I3Max inclusive of higher tolerance of the...
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Báo cáo hóa học: " Research Article Optimal Design of Nonuniform Linear Arrays in Cellular Systems by Out-of-Cell Interference Minimization" ppt
... Gaussian noise In Figure 1, the first ring of interference is denoted by shaded cells The problem we tackle is that of finding the antenna spacings in vector Δ = [Δ12 Δ23 ]T (as shown in the example) ... design in interferencelimited scenario, the interference power minimization is analytically tractable and highlights the justification for unequal spacings Therefore, the problem of minimizing the interference ... antenna spacings Δ through nonlinear relationships The first problem we tackle is that of finding the set of optimal spacings Δ that minimizes the average (with respect to fading) interference...
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Báo cáo hóa học: "An Overview of Reconfigurable Hardware in Embedded Systems" pptx
... “Simplifying the integration of processing elements in computing systems using a programmable controller,” in Proceedings of 13th Annual IEEE Symposium on Field-Programmable Custom Computing Machines ... Leeser, “Precision modeling of floating-point applications for variable bitwidth computing,” in Proceedings of the International Conference on Engineering of Reconfigurable Systems and Algorithms ... roles of FPGAs in reprogrammable systems, ” Proceedings of the IEEE, vol 86, no 4, pp 615–638, 1998 [20] R Hartenstein, “Trends in reconfigurable logic and reconfigurable computing,” in Proceedings of...
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Identification and characterization of svp interacting proteins of short vegetative phase in arabidopsis thaliana
... function of most of the J-domain proteins remains to be elucidated The function of several known J-domain proteins will be discussed in detail in section 1.5 29 1.5 Function of J-domain proteins during ... Jdomain, a glycine/phenylalanine rich domain (G/F), a CXXCXGXG zinc finger domain, and a less conserved C-terminal domain, whereas the other types of J-domain proteins lack one or more of these ... organized in a sequential order as described in section 1.4.1.1, while Type II J-domain proteins not possess the zinc finger domain Type III J-domain proteins contain only the J-domain In contrast...
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Transition state wave packet study of quantum molecular dynamics in complex systems
... is routinely applicable to systems of thousands of atoms In addition, interpretation of the MD output is straightforward and allows direct visualization of a process The major shortcoming of the ... to second order may be obtained at reasonable computational cost at various levels of ab initio theory These kinds of ab initio calculations, as well as the fitting and interpolation methods, 13 ... locally define a set of 3N − independent internal coordinates as linear combination of the {Zn } Thus at a certain configuration, Z, let ξ denote the 3N − local internal coordinates The potential energy...
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CALCULATIONS OF THE ACOUSTOELECTRIC CURRENT IN a RECTANGULAR QUANTUM WIRE
... NGHIA, DINH QUOC VUONG, NGUYEN QUANG BAU acoustoelectric current in a RQW with an infinite potential by using the quantum kinetic equation for the distribution function of electrons interacting with ... Therefore, first we have to first find the Hamiltonian describing the interaction of the electron-phonon system in the RQW with an infinite potential, which can be written in the secondary quantization ... behavior from results in the quantum well [14] As in the quantum well, in the RQW with an infinite potential the acoustoelectric current is non-linear, but in the RQW the value of the acoustoelectric...
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The Impact of Signal Bandwidth on Indoor Wireless Systems in Dense Multipath Environments
... bane of many of today’s wireless researches is coping with the increasing number of users and systems in the dwindling radio spectrum, while addressing the desire for faster, more robust systems ... processing these signals Known as linear combiners they are selection diversity, maximal ratio combining, and equal gain combining Under a certain set of assumptions, the output of these combiners ... existing narrowband communication systems which makes them a viable candidate for future systems in the dwindling radio spectrum Recent rulings by the FCC allowing the use of certain types of unlicensed...
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Tài liệu PRINCIPLES OF ASYNCHRONOUS CIRCUIT DESIGN – A Systems Perspective pdf
... combinational circuits), and think of the combinational circuits as being transparent to the handshaking between registers; a combinatorial circuit simply absorbs a token on each of its input links, ... spring 2001 course “49425 Design of Asynchronous Circuits” at DTU Any remaining errors or omissions are the responsibility of the editors The writing of this book was initiated as a dissemination ... bottom of figure 2.8 Viewed this way, the role of a C-element stage in the pipeline is to propagate crests and troughs of waves in a carefully controlled way that maintains the integrity of each...
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Tài liệu Handbook of Networks in Power Systems I docx
... Editors Handbook of Networks in Power Systems I Editors Alexey Sorokin University of Florida Industrial and Systems Engineering Weil Hall 303 32611 Gainesville Florida USA sorokin@ufl.edu Steffen ... School of Mines Division of Economics and Business Engineering Hall 15th Street 816 80401 Golden Colorado USA srebennack@mines.edu Panos M Pardalos University of Florida Dept Industrial & Systems ... for general use Printed on acid-free paper Springer is part of Springer Science+Business Media (www.springer.com) Handbook of Networks in Power Systems: Optimization, Modeling, Simulation and...
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Tài liệu A Comparison of Conventional and Organic Milk Production Systems in the U.S. potx
... labor; other costs; and operating interest Capital ownership costs include the annualized cost of maintaining the capital investment (economic depreciation and interest) in the dairy operation, and ... overhead items Total operating costs is an indicator of the relative success of dairy operations in terms of their ability to meet shortterm financial obligations The sum of operating and capital ownership ... obtained directly from farmers, but instead were imputed as the net income foregone during the transition period from selling milk at the conventional price while incurring the higher costs of...
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An Analysis of Geometric Modeling in Database Systems docx
... databases Then we introduce the notion of object orientation in database systems, which is applied to characterize the engineering database systems investigated in the remainder of this section ... ui in (u,, , us] Ui:= ui * T; 2.3 Scaling An important concept in viewing geometric objects on a computer display is varying the size in form of scaling (or stretching) Vertices (as endpoints ... model of the robot and its surrounding workspace in order to simulate the assembly operation Figure is a schematic rendering of an off-line integrated robotics programming system according to...
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Báo cáo khoa học: "Importance of Pronominal Anaphora resolution in Question Answering systems" pot
... percentage of target sentences increases 10,84 points when solving pronominal anaphora and the level of correct answers retrieved increases 22,89 points instead of 12,90 and 25,81 obtained in previous ... be considered as part of any open domain QA system Importance of pronominal information in documents Trying to measure the importance of information referenced pronominally in documents, we have ... containing pronouns in each of them As average measure of pronouns used in a collection, we use the ratio between the quantity of pronouns and the number of sentences containing pronouns This measure...
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domestication of black tiger shrimp (penaeus monodon) in recirculation systems in vietnam
... containing pollack liver oil (12.8% EPA) with a high amount of vitamin E were effective in inducing and accelerating maturation and spawning and increasing larvae production in P monodon held in ... available in the pond In contrast these extra protein sources are not or only in very limited amounts available in indoor rearing systems, especially in clear water systems Therefore, high protein diets ... nutrition of P monodon investigating the specific role of arachidonic acid in maturation, spawning and reproductive performance are also reviewed and discussed in view of quality improvement of domesticated...
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Báo cáo khoa học: Modular metabolic control analysis of large responses in branched systems – application to aspartate metabolism potx
... appearing in the inset of the figure The b-curve, showing the lowest in nitesimal control coefficient in the reference state, results in greater increases in flux for moderate or high values of ri increase ... allosteric interaction is eliminated in such a way that the starting values of the concentrations and fluxes remain unaltered In Fig 6, we represent the effect of eliminating the feedback inhibition of ... determined from data obtained by changing the concentration of the linking intermediate and measuring the corresponding rates of the modules (i.e from module rates versus S data) Changes in the intermediate...
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The fate of stormwater-associated bacteria in constructed wetland and water pollution control pond systems potx
... Location of study area Woodcroft water pollution control pond systems indicating water and sediment sampling sites PI1 main wetland inlet, PI2 secondary wetland inlet, PO wetland outlet, WI pond inlet, ... cells of approximately 2Á5 m in depth with an intervening ridge depth of m Emergent indigenous macrophytes are present around the periphery of the pond The pond has a single inlet (WI) and a single ... (mid winter to early summer in Australia) are given in Table Simultaneous sampling of the two inlets (PI1 and PI2 data combined) and the outlet in the wetland showed that out¯ow concentrations of...
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ENVIRONMENTAL IMPACT OF HEAVY METAL POLLUTION IN NATURAL AQUATIC SYSTEMS ppt
... difference in the extent of leaching of metals when the tailings are discharged in to the seawater A comparison of the leaching of metals from tailings of two base-metal mines, a zinc-lead mine on ... dredging, and altering flow and mixing of water over sediments by installing various types of structures A microbiological process affecting metals in sediments has been of much concern ever since ... the physical and chemical properties of the Interface, and geochemists and engineers interested in modelling behaviour in complex natural systems or in designing processes to remove heavy metals...
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Báo cáo khoa học: Activity of the plant peptide aglycin in mammalian systems potx
... of a binding protein in membrane extracts tested P, pancreas; L, liver; K, kidney; M, muscle Upward arrows indicate beginning of injection of the extract, downward arrows indicate beginning of ... trypsin inhibitor, lgÆmL)1 aprotinin, lgÆmL)1 leupeptin and mgÆmL)1 bacitracin), disintegrated in a JJ-2 homogenizer (GuoHua Instrument Co., Wuhan, China) with two volumes of buffer A containing ... lane B, the aglycin binding protein isolated from mice; lane C, the aglycin binding protein isolated from pig Staining was with Coomassie blue and numbers indicate molecular masses in kDa also purified...
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Quality of care A process for making strategic choices in health systems potx
... the introduction of new systems should be supported with appropriate staff orientation and training The most important contribution of a continuing process of monitoring will be in completing ... properly involved in systems of accreditation and in the governance of professional bodies? 26 Are individual users of services, and their families, appropriately involved with health workers in making ... a proper level of investment in information systems is maintained Improvements need not depend on high-tech information technology In some countries, fairly simple information systems – such...
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