... -5 S 12 dB -10 -15 -20 -25 -30 -35 2. 1 Hình 11: 2.22. 3 2.42. 5 Frequency [GHz] 2. 6 2. 7 2. 8 2. 9 ết mô ph ng S 12 (S21) với có hông có he ch V anten phân cực kép cho access point WLAN 2, 4GHz với ... phản xạ S11 S 22 simulated Measured -5 -15 -20 -25 -30 -35 -40 Frequency [GHz] Hình 6: Hệ số phản xạ S 22 S 12 simulated Measured -5 -10 -15 S 12 dB S 22 dB -10 -20 -25 -30 -35 Frequency [GHz] Hình 7: ... 1. 84 12 c 2 ae r (1) Bán kính hiệu dụng patch tính công thức: 2h ae a 1 a r 0.5 a ln 2h 1.7 726 (2) Tần số cộng hưởng anten f r 2. 44 GHz Mạch in FR-4...
... needed Then we study how this extra condition forthe case t = 2, formulated for finite fields, can be stated for 2- intersecting integer arithmetic progressions, and then using the truth of the latter ... GF (n) Therefore Theorem gives for these values of n and k a Katona type proof forthe 2- intersecting Erd˝s-Ko-Rado theorem This is true in o particular if k is a prime or k > e10100 the electronic ... Dordrecht–Boston, 1975, 21 5 24 4the electronic journal of combinatorics (20 01), #R31 [17] G O H Katona, A simple proof to a theorem of Milner, J Comb Theory A 83 (1998), 138– 140 [18] G O H Katona, The cycle...
... Specificationfor Portland Cement C 49 4-98a C 1017/C 1017M-98 C 10 64- 86 D 43 80- 84 (Revised 1993) D 43 81- 84 (Revised 1993) D 49 72- 95a 336.1-3 Specificationfor Chemical Admixtures for Concrete Specification ... sites (3.7 .4. 5) 1.8.1.7 Welding procedures for permanent casing (2. 2 .2) 1.8.1.8 AWS welder certification for permanent casing (2. 2 .2) 1.8.1.9 Welding procedures for reinforcement (2. 3.1) 1.8.1.10 ... of 3 /4 in (19 mm) 2.4. 3 Concrete shall meet the slump requirements given in Table 2.4. 3 until placement is complete 2.4.4 Water-reducing, set-retarding admixtures shall conform to ASTM C 49 4, Type...
... w0 4h w0 Zc = >1 120 π h ε w0 + 1.393 + 0.667 ln w0 + 1 .44 4 4h ÷ reff 4h truyền vi dải Trở kháng ghép tính bởi: Rin ( y = y0 ) = ( G1 ± G2 ) π G 12 + B 12 ... theo công thức (1-39) ∆L = 0 .41 2h Bước 4: (ε reff (ε reff W + 0.3) + 0 .26 4 ÷ h W − 0 .25 8 ) + 0.8 ÷ h Chiều dài thực patch tính bởi: L = Lreff +2 ∆L 1 .2. 1 .4 Điện dẫn Mỗi khe xạ diễn ... loss< 14dB hay công suất phát xạ< 4% ) Với tiêu chuẩn VSWR< 2, ta có đồ thị biểu diễn thay đổi BW(tính theo %) theo h/λo với thông số εr khác (εr =2. 2 εr=10) Công thức gần cho BW: % BW = (1 -4) Ah...
... twenty-eight days The male or papa egg The function of the spermatozoa—"Tell the whole story"—"How these spermatozoa get there" The union of the species—"How can a baby live in there for such a long ... reproductive organs at puberty The female generative organs The function of the reproductive organs The age of puberty in the female The function of the ovary The function of the womb—Why menstruation ... fruits Page 25 9 What Mothers Should Know CHAPTER XXI THE EDUCATION OF THE MOTHER What mothers should know about the care of children during illness—A sick child should be in bed The diet of the sick...