861 research outputs found

    Supramolecular assembly with ionic, redox-responsive poly(ferrocenylsilanes) : engineering of interfaces and molecular release applications

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    This thesis describes the synthesis and electrostatic assembly of organometallic poly(ferrocenylsilane) (PFS) strong polyelectrolytes. The distinctive structural features of poly(ferrocenylsilanes) come from the silicon and iron atoms in the main chain. The presence of redox-active ferrocene units in the polymer backbone provides unique redox-responsive\ud properties to PFS. The charged nature and redox-responsiveness of these organometallic polyelectrolytes makes them particularly useful in the electrostatic self-assembly process for the fabrication of novel functional supramolecular nanostructures. A major part of the research described in the thesis (Chapter 4-6) is focused on the electrostatic layer-by-layer\ud assembly featuring poly(ferrocenylsilane) polyelectrolytes

    Quark to Ξ›\Lambda-hyperon spin transfers in the current-fragmentation region

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    We perform a study on the struck quark to the Ξ›\Lambda-hyperon fragmentation processes by taking into account the anti-quark fragmentations and intermediate decays from other hyperons. We concentrate on how the longitudinally polarized quark fragments to the longitudinally polarized Ξ›\Lambda, how unpolarized quark and anti-quark fragment to the unpolarized Ξ›\Lambda, and how quark and anti-quark fragment to the Ξ›\Lambda through the intermediate decay processes. We calculate the effective fragmentation functions in the light-cone SU(6) quark-spectator-diquark model via the Gribov-Lipatov relation, with the Melosh-Wigner rotation effect also included. The calculated results are in reasonable agreement with the HERMES semi-inclusive epep experimental data and the OPAL and ALEPH e+eβˆ’e^{+}e^{-} annihilation experimental data.Comment: 14 latex pages, 8 figures. Final version for publication in PL

    Location Determination of Optimal Emergency System for Hurricane Disaster Based on Mathematical Modeling

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    This article first introduces the current research status of space optical communication, and gives a brief overview of the development and application prospects of space optical communication, explaining its important research significance. Then, the working principle of ATP in space optical communication system is studied, the mathematical model of ATP control system is established according to the actual needs, and the ATP control system design of space optical communication is designed. By selecting appropriate motors and gyroscopes as the actuators and detection elements of the system, substituting the actual parameters for simulation analysis, and correcting and verifying the results, some useful results are obtained. The simulation results show the rationality and effectiveness of the ATP design scheme
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