作者: Ascribe 時(shí)間: 2025-3-21 23:09
Harald Baldersheim,Lawrence E. Rosey because there is no evidence to the contrary. This aspect of the laws of electromagnetics should not bother us too much. Although we cannot claim absolute proof to correctness of the laws, experimentation has shown that they are correct and we will view them as such. In the learning process, we wi作者: 仇恨 時(shí)間: 2025-3-22 04:20
https://doi.org/10.1007/978-3-7908-2422-3 This information, while important in itself, is not normally a design parameter simply because we do not usually use “charge supply sources” and we are ill equipped to measure charge or charge density. The more common problem in design would be to calculate the required potential on the electrodes 作者: 失望未來(lái) 時(shí)間: 2025-3-22 06:19
Territorial Governance in Times of Crisisr the simple planar geometries discussed in Chapter 5, the solution required considerable skill. Furthermore, precious little was said about solution of Poisson’s equation. For another example of the difficulty in analytic solutions, consider Fig. 6.1, which shows a simple parallel plate capacitor. 作者: 喊叫 時(shí)間: 2025-3-22 10:27
Social Aspects of Water in Central Iran,netic field variations. Solid nickel contracts when placed in a magnetic field, while strong magnetic fields cause atoms to tilt about their spin axes, a phenomenon that leads directly to magnetic resonance imaging (MRI). Naturally occurring materials, such as magnetite (Fe.O.), are found in bacteri作者: 否決 時(shí)間: 2025-3-22 13:22 作者: 否決 時(shí)間: 2025-3-22 19:34
,Coulomb’s Law and the Electric Field,y because there is no evidence to the contrary. This aspect of the laws of electromagnetics should not bother us too much. Although we cannot claim absolute proof to correctness of the laws, experimentation has shown that they are correct and we will view them as such. In the learning process, we wi作者: 大都市 時(shí)間: 2025-3-22 21:46
Boundary Value Problems: Analytic Methods of Solution, This information, while important in itself, is not normally a design parameter simply because we do not usually use “charge supply sources” and we are ill equipped to measure charge or charge density. The more common problem in design would be to calculate the required potential on the electrodes 作者: FIG 時(shí)間: 2025-3-23 02:07
Boundary Value Problems: Numerical (Approximate) Methods,r the simple planar geometries discussed in Chapter 5, the solution required considerable skill. Furthermore, precious little was said about solution of Poisson’s equation. For another example of the difficulty in analytic solutions, consider Fig. 6.1, which shows a simple parallel plate capacitor. 作者: 分期付款 時(shí)間: 2025-3-23 08:34 作者: 不公開(kāi) 時(shí)間: 2025-3-23 12:22 作者: 擴(kuò)大 時(shí)間: 2025-3-23 15:19 作者: 新陳代謝 時(shí)間: 2025-3-23 18:25
https://doi.org/10.1007/978-3-319-07806-9Ampere’s law; Antennas and Electromagnetic Radiation; Boundary Value Problems; Coulomb‘s Law; Electromag作者: pester 時(shí)間: 2025-3-24 01:59 作者: Iatrogenic 時(shí)間: 2025-3-24 04:00 作者: libertine 時(shí)間: 2025-3-24 08:22
The Steady Electric Current,In the previous four chapters, we discussed the electrostatic field and its applications. The only reference to time was in the fact that whenever charges are placed in a conductor, they move until a steady state charge distribution is obtained. However, no attempt was made to characterize their motion or any effects this might have on fields.作者: NAUT 時(shí)間: 2025-3-24 14:29 作者: defibrillator 時(shí)間: 2025-3-24 16:20
William E. Galloway,David K. Hobday vectors and the necessary operations shortly, but, for now, it is useful to remember the following axiom which will be followed throughout this book: Nothing will be defined, no quantity or operation will be used, unless it has some utility either in explaining the observed physical quantities or o作者: notion 時(shí)間: 2025-3-24 19:57
M. K. Arora,A. K. Saha,P. Gupta,R. P. Guptaons that use integrals and derivatives. The rules needed for these evaluations constitute vector calculus. In particular, line, volume, and surface integration are important, as are directional derivatives.作者: 向外供接觸 時(shí)間: 2025-3-24 23:52
Harald Baldersheim,Lawrence E. Rose start looking into the physical phenomena of electromagnetics. It will be useful to keep this in mind: The study of electromagnetics is the study of natural phenomena. There are two reasons why it is important to emphasize electromagnetics as an applied science. First, it shows that it is a useful 作者: FILLY 時(shí)間: 2025-3-25 04:40
pter, we address two issues: one is to formalize some of the results obtained in the previous chapter and the second is to expand on the ideas of electric field intensity, electric flux density, and the relation between the electric field and material properties.作者: Pantry 時(shí)間: 2025-3-25 09:06 作者: GULLY 時(shí)間: 2025-3-25 14:26 作者: REP 時(shí)間: 2025-3-25 17:02 作者: WITH 時(shí)間: 2025-3-25 23:27 作者: 不適 時(shí)間: 2025-3-26 03:52
Wealth Inequality and Housing in Europe,y relying on the two postulates:.In Chaps. . and ., some of the basic magnetic phenomena were introduced, now relying on the following two postulates:.These postulates allowed us to treat a large number of applications and gain insight into the behavior of the electric and magnetic fields governed b作者: 自由職業(yè)者 時(shí)間: 2025-3-26 05:32
l electromagnetic phenomena.” However, it is not always clear what exactly do we mean by these equations. How are they any different from what we have studied in the previous chapters? We recall discussing static and time-dependent fields and, in the process, discussed many applications. To do so, w作者: Repetitions 時(shí)間: 2025-3-26 12:01 作者: Spinal-Fusion 時(shí)間: 2025-3-26 15:28 作者: 懶鬼才會(huì)衰弱 時(shí)間: 2025-3-26 18:40 作者: 意外 時(shí)間: 2025-3-26 23:43
https://doi.org/10.1057/9780230304130nic representation. Voltage and current were phasors, and a number of properties such as the speed of propagation, wavelength, and phase and attenuation constants were used as a direct consequence of the time-harmonic nature of the waves. Much of the discussion paralleled that of propagation of plan作者: GOAD 時(shí)間: 2025-3-27 04:46
Terror, Ideals, and Civilization,dent of conductivity of the materials involved. In fact, even for a distortionless transmission line, although an attenuation constant was present, all other basic properties of the line were independent of conductivity. The speed of propagation depended only on material properties of the line (. an作者: 他日關(guān)稅重重 時(shí)間: 2025-3-27 09:08 作者: 燦爛 時(shí)間: 2025-3-27 13:28 作者: Prosaic 時(shí)間: 2025-3-27 17:31
Nathan IdaMore than 400 examples and exercises, exercising every topic in the book.Includes 600 end-of-chapter problems, many of them applications or simplified applications.Discusses the finite element, finite作者: 思想靈活 時(shí)間: 2025-3-27 19:18 作者: 會(huì)議 時(shí)間: 2025-3-28 00:31 作者: aerobic 時(shí)間: 2025-3-28 03:42 作者: LAVE 時(shí)間: 2025-3-28 08:58 作者: OTTER 時(shí)間: 2025-3-28 12:13
https://doi.org/10.1057/9780230304130nic representation. Voltage and current were phasors, and a number of properties such as the speed of propagation, wavelength, and phase and attenuation constants were used as a direct consequence of the time-harmonic nature of the waves. Much of the discussion paralleled that of propagation of plane waves in unbounded domains.作者: hallow 時(shí)間: 2025-3-28 14:48
https://doi.org/10.1057/9780230614130the solution to the source-free wave equation. Starting with Chapter ., we assumed that a wave was generated in some fashion but did not concern ourselves too much with how the wave was generated. Occasionally, the term “source” or “antenna” was mentioned but only to indicate that the wave must have a source.作者: 反省 時(shí)間: 2025-3-28 18:47
Vector Calculus,ons that use integrals and derivatives. The rules needed for these evaluations constitute vector calculus. In particular, line, volume, and surface integration are important, as are directional derivatives.作者: 消音器 時(shí)間: 2025-3-28 23:39 作者: colony 時(shí)間: 2025-3-29 04:56 作者: heart-murmur 時(shí)間: 2025-3-29 10:25
Transients on Transmission Lines,nic representation. Voltage and current were phasors, and a number of properties such as the speed of propagation, wavelength, and phase and attenuation constants were used as a direct consequence of the time-harmonic nature of the waves. Much of the discussion paralleled that of propagation of plane waves in unbounded domains.作者: jumble 時(shí)間: 2025-3-29 13:50
Antennas and Electromagnetic Radiation,the solution to the source-free wave equation. Starting with Chapter ., we assumed that a wave was generated in some fashion but did not concern ourselves too much with how the wave was generated. Occasionally, the term “source” or “antenna” was mentioned but only to indicate that the wave must have a source.作者: 心神不寧 時(shí)間: 2025-3-29 15:47 作者: grieve 時(shí)間: 2025-3-29 21:31 作者: Mundane 時(shí)間: 2025-3-30 01:15
,Coulomb’s Law and the Electric Field, start looking into the physical phenomena of electromagnetics. It will be useful to keep this in mind: The study of electromagnetics is the study of natural phenomena. There are two reasons why it is important to emphasize electromagnetics as an applied science. First, it shows that it is a useful 作者: 征稅 時(shí)間: 2025-3-30 04:07
,Gauss’s Law and the Electric Potential,pter, we address two issues: one is to formalize some of the results obtained in the previous chapter and the second is to expand on the ideas of electric field intensity, electric flux density, and the relation between the electric field and material properties.作者: RACE 時(shí)間: 2025-3-30 11:05 作者: 災(zāi)禍 時(shí)間: 2025-3-30 15:00
Boundary Value Problems: Numerical (Approximate) Methods,n was exact and in the form of a mathematical relation. On the other hand, only certain classes of problems could be solved. In the case of the method of images, the question was one of finding the correct system of images, a requirement that meant, almost always, that a constant potential surface e作者: 恭維 時(shí)間: 2025-3-30 16:53
The Static Magnetic Field,e study of the static magnetic field. But what exactly is a magnetic field? This question will be answered gradually, but, for a simple description, we may say it is a new type of force field in the same sense that the electric field is a force field. Take, for example, a magnet. It attracts or repe作者: ACRID 時(shí)間: 2025-3-31 00:44 作者: 熒光 時(shí)間: 2025-3-31 04:19
,Faraday’s Law and Induction,y relying on the two postulates:.In Chaps. . and ., some of the basic magnetic phenomena were introduced, now relying on the following two postulates:.These postulates allowed us to treat a large number of applications and gain insight into the behavior of the electric and magnetic fields governed b作者: APO 時(shí)間: 2025-3-31 07:02 作者: 書(shū)法 時(shí)間: 2025-3-31 10:54
Reflection and Transmission of Plane Waves,they propagate through different materials and changes in their amplitudes and directions as they propagate through the interfaces between materials. This aspect of the propagation of waves is fundamental and many of the properties of waves are defined by materials and their interfaces. As an exampl作者: 反感 時(shí)間: 2025-3-31 15:30
Theory of Transmission Lines,lthough not mentioned often enough, there were a number of assumptions implicit in this type of propagation. The most important was the fact that only plane waves were treated. In most cases, we also assumed the waves only propagate forward from the source, although reflections from interfaces cause作者: 彩色的蠟筆 時(shí)間: 2025-3-31 19:08 作者: APRON 時(shí)間: 2025-3-31 22:44 作者: 貨物 時(shí)間: 2025-4-1 05:50 作者: Binge-Drinking 時(shí)間: 2025-4-1 08:18
