Xem 1-11 trên 11 kết quả Monopoles
  • Monopole Floer homology is used to prove that real projective three-space cannot be obtained from Dehn surgery on a nontrivial knot in the three-sphere. To obtain this result, we use a surgery long exact sequence for monopole Floer homology, together with a nonvanishing theorem, which shows that monopole Floer homology detects the unknot. In addition, we apply these techniques to give information about knots which admit lens space surgeries, and to exhibit families of three-manifolds which do not admit taut foliations. ...

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  • To help you have more documents to serve the needs of learning and research, invite you to consult the ebook content "The Science of Getting Rich". Content document provides information about the right to be riches, there is a science of getting rich, is opportunity monopolized, the first principle in the science of getting rich, increasing life, how riches come to you, gratitude, thinking in the certain way, how to use the will,...

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  • Phần 3: BÀI GIẢI VÀ ĐÁP ÁN PHẦN 1 1.1 Monopole là một anten đơn cực. Monopole dài L = λ / 4 Tần số : f = 300MHz Dòng vào anten: IA = 1 (A) Hiệu suất: e = 75%. a) Trở kháng vào của monopole: Ta có: monopole ZA = V 1 2V 1 dipole = = ZA I 2 I 2 Do vậy: λ Z A / 4 monopole = 1 λ / 2 dipole ZA = 36.5 + j 21.25 2 (Ω) b) Công suất bức xạ: Ta có: e= PR RR = PA RA ⇒ RR = e.RA = 23,375 + j15,94

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  • Receiver System Parameters A receiver picks up the modulated carrier signal from its antenna. The carrier signal is downconverted, and the modulating signal (information) is recovered. Figure 5.1 shows a diagram of typical radio receivers using a double-conversion scheme. The receiver consists of a monopole antenna, an RF amplifier, a synthesizer for LO signals, an audio amplifier, and various mixers, IF amplifiers, and filters.

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  • THIS book is pragmatical, not philosophical; a practical manual, not a treatise upon theories. It is intended for the men and women whose most pressing need is for money; who wish to get rich first, and philosophize afterward. It is for those who have, so far, found neither the time, the means, nor the opportunity to go deeply into the study of metaphysics, but who want results and who are willing to ...

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  • 4 Forensic Techniques Used in Environmental Litigation Scientific method vs. junk science 4.1 INTRODUCTION When evaluating the merits of performing non-intrusive forensic analysis (e.g., contaminant transport modeling or aerial photo-interpretation) and/or intrusive sampling and testing, three questions should be considered: 1. Does the analysis or testing advance the understanding of the technical aspects of the case? 2. Can the test results be damaging to your client? 3.

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  • Ultra wideband (UWB) has advanced and merged as a technology, and many more people are aware of the potential for this exciting technology. The current UWB field is changing rapidly with new techniques and ideas where several issues are involved in developing the systems. Among UWB system design, the UWB RF transceiver and UWB antenna are the key components. Recently, a considerable amount of researches has been devoted to the development of the UWB RF transceiver and antenna for its enabling high data transmission rates and low power consumption.

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  • This book explores both the state-of-the-art and the latest achievements in UWB antennas and propagation. It has taken a theoretical and experimental approach to some extent, which is more useful to the reader. The book highlights the unique design issues which put the reader in good pace to be able to understand more advanced research.

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  • India’s markets are monopolized in only a few areas reserved for the public sector, such as postal services, defense, atomic energy and railways. The government is considering gradual private participation in areas reserved for exclusive state ownership. Monopolies are rare in activities open to the private sector. The Competition Act, 2002 prohibits anti-competitive agreements, including the formation of cartels and the sharing of territories, restrictions of production and supply, collusive bidding and bid rigging and predatory pricing.

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  • This paper concentrates on studying, designing and manufacturing a dual – band and high – bandwidth antenna applied for advance mobile handsets. This antenna can work in GSM/UMTS bands by generating two resonant modes of 900 MHz and 1900 MHz frequencies. Antenna is printed on FR4 substrate with size of 58 mm x 80 mm, thickness of 1.6 mm and relative permittivity of 4.4. The propose antenna is experimentally studied. Keywords: Antenna, dual-band, monopole, microstrip antenna.

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