eletromagnetic field and wave

... connection between changing eletric fields and magnetic fields. They can create each other and form a system of electromagnetic fields.  Electromagnetic fields can propagate in the space (vacuum ... XIII Electromagnetic Oscilation, Eletromagnetic Field and Wave §1. Oscillating circuits §2. System of Maxwell’s equations §3. Maxwell’s equations and electromagnetic waves 4/8/2008 42  How are Maxwell’s ... electromagnetic wave equation: Now we show that • The components of electric and magnetic fields obey wave equations which are derived from the Maxwell’s equations • Harmonic plane waves described...

Ngày tải lên: 21/12/2013, 03:15

... transform of the imaginary odd function is real and odd. Let and refer to real and imaginary, and to even and odd, and lower-case and upper-case letters to time and frequency functions. A summary of the ... two-dimensional spectrum of a plane wave [ ], where the plane wave has a randomly fluctuating amplitude: say, rand is a random number between , and the randomly modulated plane wave is [ ]. 5 Explain the ... called plane waves. But we need a name for waves that are near to plane waves. A Snell wave will be defined to be the generalization of a plane 32 CHAPTER 3. DOWNWARD CONTINUATION OF WAVES wave to...

Ngày tải lên: 17/12/2013, 06:15

... two-dimensional spectrum of a plane wave [ ], where the plane wave has a randomly fluctuating amplitude: say, rand is a random number between , and the randomly modulated plane wave is [ ]. 5 Explain the ... vertical. Perpendicular to the ray is a wavefront. By elementary geometry the angle between the Figure 3.1: Downgoing ray and wavefront. dwnc-front [NR] z x ray front wavefront and the earth’s surface is ... DOWNWARD CONTINUATION OF WAVES wave to a stratified medium . A plane wave that happens to enter a medium of depth- variable velocity gets changed into a Snell wave. While a plane wave has an angle of propagation,...

Ngày tải lên: 22/12/2013, 21:17

... the roadway. “On hands and knees most of the time, I crawled 500 yards or more to the towers My breath was coming in gasps; my knees were raw and bleeding, my hands bruised and swollen from gripping the ... Period, Frequency, and Amplitude 15 The Light and Matter series of introductory physics textbooks: 1 Newtonian Physics 2 Conservation Laws 3 Vibrations and Waves 4 Electricity and Magnetism 5 Optics 6 ... h, and verify that plugging in h − h 0 gives a total force of zero. (c) Find the cube’s period of oscillation as it bobs up and down in the water, and show that can be expressed in terms of and...

Ngày tải lên: 19/01/2014, 14:34

... TCM. First, the fuzzy neural network and the wavelet transforms are respectively introduced. Second, the continuous wavelet trans- forms (CWT) and discrete wavelet transforms (DWT) are used to ... and the estimated value of the spindle and feed current, namely, S i and F i (i = 1, 2, . . . , 6) are outputted. Second, the spindle and feed current detected are put into the logarithm, and ... ( t ), wavelet transforms (WT) consist of computing a coefficient that is the inner product of the signal and a family of wavelets. In the continuous wavelet transforms (CWT), the wavelet corresponding...

Ngày tải lên: 23/01/2014, 01:20

... pháp gán bước sóng trong mạng WDM. 3.2. Giới thiệu về định tuyến và gán bước sóng (Routing and Wavelength Assignment - RWA). Khi một lightpath được chọn và xác định, mỗi lightpath cần được ... tuyến ngoài Luận văn Định tuyến và gán bước sóng trong mạng WDM (Routing and Wavelength Assignment) Chương 2: Giới thiệu mạng WDM 24 hai bộ tiếp sóng ở node B như trong ... bước sóng đầu tiên còn rỗi giữa những tuyến liên kết trong đường này. Bài toán RWA ( Routing and Wavelength Assignment) được chia làm hai phần: định tuyến và gán bước sóng. 3.4. Định tuyến...

Ngày tải lên: 15/03/2014, 16:20

Ngày tải lên: 17/03/2014, 13:38

Ngày tải lên: 17/03/2014, 14:44

... American Forest and Paper Association; Edison Electric Institute; National Council of the Paper Industry for Air and Stream Improvement; coordinated and provided initial draft criteria and developed ... criteria. C An N.A. in the standard deviation column for a compound indicates that there was only one study that met the proposed criteria and so it is not possible to calculate a standard deviation. E-14 Table ... of microbial processes and mechanisms represented in the protocol, played a key role in the laboratory protocol developed earlier and published in the Federal Register and provided continuity...

Ngày tải lên: 28/03/2014, 19:20

... (1977) Benzene Vejen City, Jutland, Denmark Landfill site Aquifer sediment + groundwater Lab microcosm 150 ug/L 0.2/day 5 Nielsen,PH et. al. (1996) Benzene Vejen City, Jutland, Denmark Landfill site Aquifer ... (1987) Benzene Vejen City, Jutland, Denmark Landfill site Aquifer sediment + groundwater Lab microcosm 120 ug/L 90 0.033/day Holm,PE et. al. (1992) Benzene Vejen City, Jutland, Denmark Landfill site Aquifer ... Holbaek,Western Sealand, Denmark Skellingsted landfill Soil Lab microcosm 600 ug/L 0.83 3.3/day Kjeldsen,P et. al. (1997) Benzene Holbaek,Western Sealand, Denmark Skellingsted landfill Soil Lab...

Ngày tải lên: 28/03/2014, 19:20

... appropriated mangrove band width. With the assumption that the average maximum wave height is 300cm and safe wave height behind forest band is 30cm, required mangrove forest band width in associated ... protection waves. The southern mangrove forests of Vietnam protect waves better than the northern mangrove forests do (i.e., higher V index). Required mangrove band width and length for wave attenuation ... analyze the relationship of mangrove forest to wave attenuation; and to define minimum mangrove forest band width for coastal protection from waves in Vietnam. 1.2. Dissertation Structure...

Ngày tải lên: 03/04/2014, 12:22

... 37 3 Free Waves 39 3.1 Wave Motion 40 3.2 Waves on a String 44 3.3 Sound and Light Waves 48 3.4 Periodic Waves 50 3.5 The Doppler Effect 54 Summary 58 Homework Problems 59 4 Bounded Waves 61 4.1 ... in fact waves. In this new world-view, it is vibrations and waves that are fundamen- tal, and the formation of matter is just one of the tricks that waves can do. 1.1 Period, Frequency, and Amplitude The ... for the aether, and it is no longer believed to exist. Instead, light can be explained as a wave pattern made up of electrical and magnetic fields. Section 3.3 Sound and Light Waves 32 Example:...

Ngày tải lên: 24/04/2014, 16:53

... the first chapter and Damped Simple Harmonic Motion the second. Chapter 10 on waves in optical systems now becomes Chapters 11 and 12, Waves in Optical Systems, and Interference and Diffraction ... Reflection and transmission of transverse waves at a boundary (117) Impedance matching (121) Insertion of quarter wave element (124) Standing waves on a string of fixed length (124) Normal modes and ... Loaded String 90 The Wave Equation 95 5 Transverse Wave Motion 107 Partial Differentiation 107 Waves 108 Velocities in Wave Motion 109 The Wave Equation 110 Solution of the Wave Equation 112 Characteristic...

Ngày tải lên: 24/04/2014, 17:22

Ngày tải lên: 13/05/2014, 09:18

Ngày tải lên: 27/05/2014, 02:43

Ngày tải lên: 21/06/2014, 05:20

Ngày tải lên: 21/06/2014, 06:20

Ngày tải lên: 21/06/2014, 06:20

Ngày tải lên: 21/06/2014, 06:20