... not only in the field of communication but also in the medical industry, material sintering process, in food industry, in drying industry because of its energy saving potential, reducing the ... derivation of electromagnetic wave’s propagation equation Based on the analytical solution equation of the wave’s propagation equation, the selection of wave guide is carried out The dimension of ... operation mode based on the adsorbate concentration Table C.1 The lists of errors of the comparative analysis among the linear and non linear model of First order and Second order reaction equations...
Ngày tải lên: 11/09/2015, 10:16
... interesting to speculate whether nurses in the United Kingdom are sufficiently proud of their hard work to sing a song about it in front of their patients Malawian clinics fly the national flag ... village custom of conveying a message to peers Patients in the United Kingdom would certainly remember a smoking cessation advice session that included singing and dancing with their doctor or ... and also by the appearance of poor-quality counterfeit products [7] The emergence of the Internet as the dominant source of educational support in both the developed and the developing world has...
Ngày tải lên: 18/06/2014, 17:20
Báo cáo lâm nghiệp: "Field trials of potential attractants and inhibitors for pine shoot beetles in the Yunnan province, China" pps
... their application in combination with verbenone did not inhibit attacks in comparison with verbenone application alone Neither the Jilin nor Yunnan monoterpene blends appeared attractive to the ... transformation prior to analysis crown on Yunnan pines [29] Studies investigating the appropriate number and placement of verbenone elution devices on individual trees and the timing of the applications ... formed the base of the bundle with the third log on top One end of the bottom logs was placed on another short log to raise the ends and to increase available surface area for attack The ends of the...
Ngày tải lên: 08/08/2014, 00:21
Ceftriaxone-induced up-regulation of cortical and striatal GLT1 in the R6/2 model of Huntington’s disease pps
... effect of ceftriaxone in both brain regions at and 13 weeks of age (P < 0.0001 in each case) Discussion Our results not only confirm the ability of ceftriaxone to elevate GLT1 expression in cortex ... blocking buffer Protein loading was normalized using b-tubulin immunoblotting as a loading control Chemiluminescent detection of HRP (SuperSignal West Pico; Pierce) was followed by exposure of the ... membranes [20], is reduced in HD mice, including palmitoylation of GLT1 [21] Whether ceftriaxone increases GLT1 palmitoylation is the focus of ongoing research It is unlikely that other glutamate transporters...
Ngày tải lên: 10/08/2014, 05:21
báo cáo khoa học: " Can learning organizations survive in the newer NHS?" pps
... penetrating question is whether at the level of its constituent organisations, conditions in the NHS are equally inhospitable to learning organisations At that level, the combination of marketisation ... pointed out some tensions between learning organisation norms and the institutions through which the clinical professions continue to train and socialise their members These interests constrain ... but that they are dispensable Then, the creation of one condition (i.e competition) stimulating the learning organisation approach negates another condition (i.e trust between professionals and...
Ngày tải lên: 11/08/2014, 05:22
BÀI LUẬN TIẾNG ANH HAY how i can stop wasting things in the house
Ngày tải lên: 21/08/2015, 15:19
Trường điện từ - electromagnetic field theory
... >> (2.74) bỏ qua vô bé ta có I m lk I l sin θ sin ( ωt − kr ) = − m sin θ sin ( ωt − kr ) 4πr 2λr I lk I l µµ0 Eθ = m sin θ sin ( ωt − kr ) = − m sin θ sin ( ωt − kr ) 4πωεε0 r 2λr εε0 Hϕ = (2.76) ... R sin θ cos ϕ r 1 R R ≈ 1 + sin θ cos ϕ = + sin θ cos ϕ r r r r 1− ≈ Và e −ikr′ ≈ e −ik ( r −R sin θcos ϕ) = e −ikr e ikR sin θcos ϕ = = e −ikr ( cos( kR sin θcos ϕ) + i sin ( kR sin ... ϕ Trong đó: r khoảng cách từ O đến Q Theo giả thiết r’ >> R nên cho R2 = từ (2.91) ta có r′ = r − 2Rr sin θ cos ϕ = r − 2R sin θ cos ϕ ≈ r − R sin θ cos ϕ r Suy 46 (2.91) 1 = = r ′ r − R sin θ...
Ngày tải lên: 12/10/2012, 15:00
TRƯỜNG ĐIỆN TỪ - ELECTROMAGNETIC FIELD THEORY - chương 2
... cường độ điện trường xoáy dọc theo đường cong kín giá trị tuyệt đối trái dấu với tốc độ biến thiên theo thời gian từ thông gửi qua diện tích giới hạn đường cong kín Theo giải tích vector (công ... điện trường tĩnh đường cong hở Điện trường tĩnh không làm cho hạt điện dịch chuyển theo đường cong kín để tạo thành dòng điện (vì hoá điện trường tĩnh không cần tốn công mà sinh lượng điện !) Muốn ... thứ hai - Phương trình Maxwell-Ampere Theo luận điểm I, từ trường biến thiên theo thời gian sinh điện trường xoáy Vậy ngược lại điện trường biến thiên có sinh từ trường không ? Để đảm bảo tính...
Ngày tải lên: 17/10/2013, 17:15
TRƯỜNG ĐIỆN TỪ - ELECTROMAGNETIC FIELD THEORY - chương 3
... (3.44) cho z = ta có: • • E1mx eik y sin ϕ + E′1mx e • H1my e t ik1y sin ϕt • ik1y sin ϕpx − H′1my e ik1y sin ϕpx • = E mx eik y sin ψ • = H my e (3.45) ik y sin ψ (3.45) thoả mãn ∀y ta lại có: ... thuộc vào dấu góc lệch pha 3.4.3 Phân cực thẳng (tuyến tính) r Trong trình truyền sóng theo trục z, vector E hướng song song theo đường thẳng gọi sóng phân cực thẳng hay sóng phân cực tuyến tính ... = E mx • (3.46) H1my − H′1my = H my eik y sin ϕ = e t ik1y sin ϕpx = eik y sin ψ Từ biểu thức cuối (3.46) suy ra: ϕ t = ϕ px (3.47) k1 sin ϕt = k sin ψ (3.48) Nhận xét: (3.47) mô tả định luật...
Ngày tải lên: 20/10/2013, 05:15
TRƯỜNG ĐIỆN TỪ - ELECTROMAGNETIC FIELD THEORY - chương 4
... bỏ qua vô bé bậc λ ta có kr I m lk I l sin θ sin (ωt − kr ) = − m sin θ sin (ωt − kr ) 2λ r 4πr I lk I l μμ0 Eθ = m sin θ sin (ωt − kr ) = − m sin θ sin (ωt − kr ) 4πωεε0 r 2λr εε Hϕ = (2.76) ... R sin θ cos ϕ r 1⎛ R ⎞ R ≈ ⎜1 + sin θ cos ϕ ⎟ = + sin θ cos ϕ r⎝ r ⎠ r r Và e − ikr′ ≈ e − ik ( r −R sin θ cos ϕ ) = e − ikr e ikR sin θ cos ϕ = = e −ikr (cos(kR sin θ cos ϕ ) + i sin (kR sin ... (2.91) Hay Trong đó: r khoảng cách từ O đến Q Theo giả thiết r’ >> R nên cho R2 = từ (2.91) ta có r′ = r − 2Rr sin θ cos ϕ = r − 2R sin θ cos ϕ ≈ r − R sin θ cos ϕ r Suy 1 1 = = ≈ r′ r − R sin θ cos...
Ngày tải lên: 20/10/2013, 05:15
TRƯỜNG ĐIỆN TỪ - ELECTROMAGNETIC FIELD THEORY - chương 5
... = r0 sin θ sin ϕ + θ cos θ sin ϕ − ϕ cos ϕ Khi đó: 14 (4.45) ⎛ ka ⎞ ⎛ kb ⎞ sin ⎜ sin θ cos ϕ ⎟ sin ⎜ sin θ sin ϕ ⎟ e ⎝ 2R ⎠ ⎝ 2R ⎠ φ = ab ka kb R sin θ cos ϕ sin θ sin ϕ 2R 2R − ikR x ϕ y (4.46) ... Trong đó: r r φ E = i φ, r r φM = j φ (4.44) Chuyển sang hệ toạ độ cầu ta có: x = r sin θ cos ϕ y = r sin θ sin ϕ r r r r i = r0 sin θ cos ϕ + θ cos θ cos ϕ − ϕ sin ϕ r r r r j = r0 sin θ sin ... giản đồ hướng có dạng ⎛ ka ⎞ sin ⎜ sin θ ⎟ ⎠ FE (θ) = ⎝ ka sin θ - Tại mặt phẳng ϕ = (4.49) π (mặt phẳng H) giản đồ hướng có dạng ⎛ kb ⎞ sin ⎜ sin θ ⎟ ⎠ FH (θ) = ⎝ kb sin θ (4.50) Nhận xét: Vì giản...
Ngày tải lên: 24/10/2013, 04:15
Tài liệu FIELD INTENSITY and POWER DENSITY doc
... intensity and voltage terms from Table and Table Refer the examples in Section 4-12 for usage of the conversions while converting free space values of power density to actual measurements with a spectrum ... shown in Section 4-12 SAMPLE CALCULATIONS Section 4-2 provides sample calculations using power density and power terms from Table and Table 2, whereas Section 4-12 uses these terms plus field intensity ... conversions (Watts to mW) as required (volts to µv)2 (Hz to MHz or GHz)2 Values of K4 (dB) The derivation of equation [3] follows: Eq [1], Section 4-1, terms (v2/S) Ae = 82G/4B Eq [2], Section...
Ngày tải lên: 12/12/2013, 09:15
Tài liệu TRƯỜNG ĐIỆN TỪ - ELECTROMAGNETIC FIELD THEORY - chương 1 pptx
... (16) Theo công thức Euler ta có e iβx = cos β x + i sin β x e −iβx = cos β x − i sin β x (17) Suy • y1 = e αx eiβx = e αx (cos βx + i sin βx ) • y2 = e e • αx − iβ x =e αx (cos βx − i sin βx ... sin y ) Hàm mũ hàm tuần hoàn có chu kì 2πi Thực vậy, ta có e kπi = cos 2kπ + i sin 2kπ = Suy e z + kπi = e z e kπi = e z Công thức Euler eiy = cosy +isiny Khi số phức z = r eiϕ = r(cosϕ +isinϕ) ... sin βx 2i nghiệm phương trình vi phân (7) độc lập từ trường (19) y1 = tgβx ≠ const y2 (20) Do nghiệm tổng quát phương trình vi phân (7) y = C1eαx cos βx + C eαx sin βx = e αx (C1 cos βx + C sin...
Ngày tải lên: 26/01/2014, 02:20
Báo cáo khoa học: Ferrous Campylobacter jejuni truncated hemoglobin P displays an extremely high reactivity for cyanide – a comparative study ppt
... proton acceptor and donor group(s) that may assist the deprotonation of the incoming ligand, or the protonation of the outgoing cyanide anion [18] This interpretation is in agreement with the ... association ⁄ dissociation In a dynamic protein context, the contribution of HisE7, shown to adopt different conformations in Cj-trHbP(III) crystals, might also be considered either in direct ligand interactions ... heme-proteins Values in italic were calculated according to the following equations: L ¼ loff ⁄ lon and K ¼ koff ⁄ kon Fe(III) )1 Fe(II) )1 )1 (Non)vertebrate globin lon (M Æs ) loff (s ) L (M) kon...
Ngày tải lên: 16/03/2014, 06:20
Electromagnetic field theory - bo thide
... Ô In the rst of the two integrals on the right hand side, we use the representation of the Dirac delta function Equation (M.73) on page 174, and integrate the second one by parts, by utilising ... the only longitudinal component of B must be constant in both time and space In other words, the only non-static solution must consist of transverse components 2.2.1 Telegraphers equation In analogy ... Equation (1.18) on the preceding page that there we used the fact that in magnetostatics ã j(x) = In the case of nonstationary sources and elds, we must, in accordance with the continuity Equation...
Ngày tải lên: 17/03/2014, 13:45
selfridge, arnold, warnick. teaching electromagnetic field theory using differential forms
... Interestingly, none of these concepts are intrinsically more di cult than other aspects of EM theory; rather, they are unclear because of the limitations of the mathematical language traditionally ... applied to the orientations of the surfaces making up the walls of a tube The orientation of dx is in the +x direction, and dy in the +y direction, so the ux due to dx dy is in the +z direction As ... TRANSACTIONS ON EDUCATION direction of ow along the lines of the 1-form can be found using the right-hand rule on the direction of H1 ? H2 in region above the boundary (b) (a) (c) Fig 17 (a) The 1-form...
Ngày tải lên: 24/04/2014, 16:51
Charged particle in a electromagnetic field 2
... notes in a particular case of a single particle of charge q Comparing the expression for the Lorentz force in the form (22) with the definition (2) of the generalized force in terms of the velocity-dependent ... and ϕ are independent of t, then L does not depend on t explicitly and the energy function is constant, that is T + qϕ = const (29) Since the second term in this equation is nothing but the potential ... This is the system of the coupled linear differential equations of the second order, ωL = and hence we can try a solution of type x = Aeiωt , y = Beiωt (57) Then the system (55) changes to the system...
Ngày tải lên: 24/05/2014, 19:10
Charged particle in a electromagnetic field 3
... p as −i¯ , following the prescription to replace the canonical momentum h in the classical theory by −i¯ to preserve the canonical commutation h relations [x, p] = i¯ To convince yourself this ... many-electron wave-function, etc Think of one electron interfering with itself, in the same sense as a 2-slit experiment Then ψ is the amplitude the electron follows path 1, and ψ is the amplitude it ... talking necessarily about electrons interfering with each other, although we could We say “beams of electrons”, but then in principle we should worry about antisymmetrizing the many-electron wave-function,...
Ngày tải lên: 24/05/2014, 19:10
Lagrangian of charged particle in electromagnetic field
... A.i = −q x & & & ∂& dt ∂x dt 2x3 ∂& dt ∂x dt ∂x {x ÷ dt dt =0 =0 u không phụ thuộc tường minh vào u r r & x ∂ ( qϕ ) ∂A ϕ; A = 0; =0 & & ∂x ∂x Vậy, ru r dA x d ∂ −q = qϕ − qv.A & dt dt ∂x...
Ngày tải lên: 24/05/2014, 19:12
maxwell jc - a dynamic theory of the electromagnetic field
... each other in virtue of their connexion with the magnetization of the propose to examine, conductors in the The second is field The first result of this connexion that I the induction of one current ... 461 depends in some way on the motion of the rest; and at the same time these connexions must be capable of a certain kind of is elastic yielding, since the communication of motion not instantaneous, ... depends only on the form and relative position of the circuits on the form and relative position of the motion of the conductors It will quantities of the nature of lines, that form of the first...
Ngày tải lên: 04/06/2014, 12:44