tµi liöu tham kh¶o 53
Báo cáo khoa học: "A Tree Transducer Model for Synchronous Tree-Adjoining Grammars" pdf
Ngày tải lên :
17/03/2014, 00:20
... Computing, 39(2):410–430 Liang Huang and David Chiang 2005 Better k-best parsing In Proc IWPT, pages 53 64 Association for Computational Linguistics Kevin Knight and Jonathan Graehl 2005 An overview ... Schabes 1990 Synchronous tree-adjoining grammars In Proc Computational Linguistics, volume 3, pages 253 258 Stuart M Shieber 2004 Synchronous grammars as tree transducers In Proc TAG+7, pages 88–95...
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synchronous generators chuong (2)
Ngày tải lên :
21/03/2014, 12:12
... and performance of small doubly salient rotor PM motor, EPCS (former EMPS), vol 30, 2002, pp 523 532 15 F Blaabjerg, I Christensen, P.O Rasmussen, and L Oestergaard, New advanced control methods...
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synchronous generators chuong (3)
Ngày tải lên :
21/03/2014, 12:12
... [18]: tan h(Te ⋅ s) = Te ⋅ s ⎛ T ⋅s ⎞ 1+ ⎜ e ⎟ ⎝ ⎠ (T ⋅ s ) − 2T (T ⋅ s ) + T G2 (s) = W e e W (3 .53) ⋅s + ⋅s + Figure 3.37 shows comparative results for G(s), G1(s), and G2(s) for Te = 0.25 sec ... calculated by portraying the ideal wind speed and pressure profile before and after the turbine (Figure 3 .53, [1]) The wind speed decreases immediately before and after the turbine disk plane, while a pressure ... drag subtype and (b) lift subtype U1 U Speed u∞ U1 FD A1 ωr U A A∞ Pressure Wind (a) (b) FIGURE 3 .53 (a) Basic wind turbine speed and (b) pressure variation © 2006 by Taylor & Francis Group, LLC...
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synchronous generators chuong (4)
Ngày tải lên :
21/03/2014, 12:12
... 0.72 ⋅ π = 0.9 6538 π τ π − τp τp π = 0.4776 + 0.0904 = 0.565 sin π + cos π τ 3π τ (W1 K W ) ⋅ τ ⋅ lstack 6μ X m = 20 ω r K C g (1 + K s ) p1 π with : τ = πDis / p1 = π ⋅13 / 90 = 0. 4535 5 m ⋅ 4π ... 0. 4535 5 m ⋅ 4π × 10−7 ⋅ 2π ⋅ 50 ⋅ (115 ⋅ 0.9598 ) × 0. 4535 5 × 1.4 Xm = π × 1.15 × 0.020 (1 + 0.2 ) × 45 = 1.4948 Ω X dm = 1.4948 × 0.9 6538 = 1.443 Ω X qm = 1.4948 × 0.565 = 0.8445 Ω With X1l ... 1⎟ = 72 ⋅106 ⎜ − = 536 ⋅ 772 kW ⎝ 0.9926 ⎟ ⎠ ⎝ ηr ⎠ The stator winding losses pcopper are pcopper = 3R1I12r = ⋅ 0.0125 ⋅ 30002 = 337.500 kW so, pFe = pmec = ∑p− p copper = 536 .772 − 337500 =...
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synchronous generators chuong (5)
Ngày tải lên :
21/03/2014, 12:12
... = Ψ Q = LQl I Q + Lqm I q + I Q MQ ) (5.52) with ⎛ Lqm ⎞ r LQl = LrQl ⋅ ⎜ ⎟ = LQl K ⎝ MQ ⎠ Q (5 .53) Lqm ≈1 LQm ⋅ MQ r r We still need to reduce the rotor circuit resistances R rf , RD , RQ and ... approximated to a straight line (see Figure 5.16): t asav ≈ − K as Sω1 = + K as ( ω r − ω1 ) (5. 153) Equation 5.152 may provide a good basis from which to calculate Kas for high-power SGs (rs ≈...
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synchronous generators chuong (6)
Ngày tải lên :
21/03/2014, 12:12
... means (FACTS; see Figure 6 .53) The thyristor AC voltage tap changer (Figure 6.53a) performs the variation of ΔV through the ST, while the unified power controller (Figure 6.53b) may vary both the ... Trans., EC-10, 3, 1995, pp 524 531 G Roger Bérubé, Les.M Hayados, and R.E Beaulien, A utility perspective on underexcitation limiters, IEEE Trans., EC-10, 3, 1995, pp 532 537 10 G.K Girgis, and H.D ... Trans., EC-10, 3, 1995, pp 538 –542 11 H Vu, and J.C Agee, Comparison of power system stabilizers for damping local mode oscillations, IEEE Trans., EC-8, 3, 1993, pp 533 538 12 A Murdoch, S Venkataraman,...
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synchronous generators chuong (7)
Ngày tải lên :
21/03/2014, 12:12
... 100000( kVA ) Sn = = 0.647 m 2 ⎛ kVAmin ⎞ C ⋅ D ⋅ nn 9⎜ 10.70 ) m 150( rpm ) ( ⎝ m3 ⎟ ⎠ ( ) (7 .53) The flux per pole Φ1 (Equation 7.8) is Φ1 = 2 π ⋅10.7 ⋅ Bg1 ⋅ τ ⋅ li = ⋅ 0.9 ⋅ ⋅ 0.647 = 0.3115 ... x d ( x d = 2.0) and, thus, to a rather small airgap for this 10.7 m rotor diameter with a 0.8 453 m pole pitch Turbogenerators are characterized by a larger airgap for the same A, Bg1, and SCR, ... conditions at rated voltage Fan1 = as © 2006 by Taylor & Francis Group, LLC ⋅ W1 ⋅ K W ⋅ I n π ⋅ p1 (7. 153) ...
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synchronous generators chuong (8)
Ngày tải lên :
21/03/2014, 12:12
... voltage Ea and current Ia from (Emax, Iamin) to (Emin, Iamax): Xq = Ea I a max ; Xd = Ea max I a (8 .53) The degree of saturation depends on the level of current in the machine To determine the unsaturated ... − Vc ) sin ⎟ = ( Vb − Vc ) = ⎝ 3⎜ 3⎠ 3 (8.93) iq = Vq = (8.91) Under flux decay, from Equation 8 .53 with Equation 8.92 and Equation 8.93, ( ) Ψ qinitial iqo , i fdo = ∞ ∫ i R dt + ∫ V b a diode...
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Altivar 71Variable speed drives for synchronous motors and asynchronous motors Installation pptx
Ngày tải lên :
28/06/2014, 16:20
... (54.72) 417.5 (16.44) 1120 (44.09) 415 (16.34) 11.5 (0.45) 1110 (43.49) 1150 (54.72) 532 .5 (20.96) 1120 (44.09) 532 .5 (20) 11.5 (0.45) For screws C31N4D C40N4D C50N4D = a a M10 M10 Weight kg (lb.) ... (2.76) 380 (14.96) 1120 (44.09) 150 (5.91) 75 (2.95) 30 (1.18) 11.5 (0.45) 1120 (44.09) 1390 (54.72) 532 .5 (20.96) 70 (2.76) 495 (1949) 1120 (44.09) 150 (5.91) 75 (2.95) 30 (1.18) 11.5 (0.45) = For ... supply (input) Max line current (2) 500 V kW 90 110 132 160 200 250 315 400 500 at 500 V A 128 153 182 227 277 342 439 544 673 575 V HP 125 150 200 250 350 450 550 700 690 V kW 110 132 160 200...
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Schneider Electric-Altivar 71 Variable speed drives for synchronous motors and asynchronous motors potx
Ngày tải lên :
28/06/2014, 16:20
... 30 40 50 60 Line supply (input) Max line current (2) at 200 V A 3.5 6.1 11.3 15 19.3 25.8 35 45 53. 3 71.7 77 88 124 141 167 at 240 V A 3.1 5.3 9.6 12.8 16.4 22.9 30.8 39.4 45.8 61.6 69 80 110 ... (0.45) (0.24) M5 30 (66.14) 240 (9.45) 550 (21.65) 266 (10.47) 289 (11.38) 312 (12.28) 206 (8.11) 531 .5 (20.93) 11 (0.45) (0.24) M5 37 (81.57) D30M3X, D37M3X, D45M3X 320 (12.60) 550 (21.65) 266...
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VCM 2012 11 Đề xuất phương pháp kích từ cho máy phát đồng trục sử dụng máy điện dị bộ nguồn kép trong trạm phát điện tàu thủy A novel excitation method for shaft generators using doublyfed induction machines on power –station on shipboards
Ngày tải lên :
25/07/2015, 07:26
... mạch hệ thống mạch liên tục nên kết điện áp máy phát hoàn toàn liên tục có dạng sin chuẩn Tài liệu tham khảo [1] GS.TSKH Thân Ngọc Hoàn; TS Nguyễn Tiến Ban, Trạm phát lưới điện tàu thủy, Nhà xuất...
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Tài liệu Manual for induction motors and generators ppt
Ngày tải lên :
26/01/2014, 09:20
... ring unit Follow-up Shut down 51 51 51 52 52 52 52 52 53 53 53 Chapter - Maintenance 7.1 7.2 7.3 7.4 7.5 4- Preventive maintenance Safety precautions ... example, anti-condensation heating)! Exceeding of limit values of zone A in EN 60034-1 / DIN VDE 0530 -1 - voltage ± 5%, frequency ± 2%, waveform and symmetry -leads to higher temperature rise and ... example, EN 60204) These machines comply with the harmonized series of standards EN 60034 / DIN VDE 0530 Their use in explosive atmosphere is prohibited unless they are expressly designed for such...
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Tài liệu Báo cáo khoa học: "A Flexible Pragmatics-driven Language Generator for Animated Agents" doc
Ngày tải lên :
22/02/2014, 02:20
... proposed here Whereas they propose an integrated planning approach, we advocate a very modular sys- 153 The value of the attribute currentAct is passed on from the mother node to the daughter nodes...
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