递归多项式与Berlekamp-Massey算法在信息学竞赛中的应用

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"IOI2017中国国家候选队论文集包含了多个关于信息学竞赛的深入研究论文。其中,一篇由雅礼中学的毛啸撰写的论文‘关于数列递归式的一些研究’探讨了递归多项式和Berlekamp-Massey算法,这两种在竞赛中不常被关注的主题。 递归多项式是针对隐式递归关系的研究,不同于传统竞赛中常见的显式递归。这种新的概念有助于解决数列中特定项的计算,同时也涉及递归式的计数问题。递归多项式提供了一个强大的工具,可以处理更复杂的序列模式和未知的递归关系。 Berlekamp-Massey算法是一种在信息学竞赛中鲜为人知但极具价值的算法。尽管它通常被视为一种快速解决问题的捷径,但其实它有更广泛的应用。算法的核心在于求解线性反馈移位寄存器,这在编码理论和序列分析中有重要作用。毛啸指出,Berlekamp-Massey算法在竞赛中尚未得到充分的利用,它的潜力有待进一步发掘。 在论文中,作者不仅定义了数列对应的多项式,还引入了‘最小次数’的概念,这是理解递归多项式的基础。最小次数是指多项式中最高次项的指数,这对于确定多项式的性质和简化计算至关重要。 此外,论文还讨论了如何通过递归多项式和Berlekamp-Massey算法来处理和解析竞赛中的数列问题,这为参赛者提供了新的思考方向和解题策略。通过深入理解和应用这些概念,信息学竞赛的参与者可以扩展他们的技能,解决更为复杂的问题。 这篇论文对信息学竞赛的参与者来说是一份宝贵的资源,它揭示了传统竞赛题目之外的理论深度,鼓励参赛者探索并掌握不常用但极其有效的算法和技术。"
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VITA 62-2016 英文原版标准,带目录。 VITA 62 defines both the mechanical and electrical requirements for COTS modules intended for creating modular power supplies. The primary focus is to support [VITA 46.0] and [VITA 65] systems with off the shelf modules that are compatible with the VPX specifications. The embedded market has focused primarily on the need to standardize the use of COTS processing add-in modules as part of the VPX suite of standards. Before this standard system designers treated the power supply as a necessary evil, which is often an afterthought. Modular power supply suppliers provided ad hoc solutions that system developers must implement. Providing power for these systems had historically been left up the module vendor, requiring them to define what has, at times, been seen as a form of “black art.” This standard, however, defines a set of rules by which industry power supply vendors can build COTS products, for VPX systems, that will fit into VITA 62 compatible backplanes. Consequently, system developers can have multiple vendors for power supply modules. At this time the focus of this standard is to define modules for VPX systems. In the future this standard may also be extended into other form factors. As part of the work to create VITA 62, a new connector system has been defined, optimized for the needs of VITA 62. This connector mechanically fits within the envelope defined in [VITA 46.0] for 3U and 6U Plug-In modules. This will facilitate the production of backplanes and allow system designers to define where and how many power supply modules are to be used within any given system.