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    HDOJ/HDU 1015 Safecracker(枚举、暴力)

    Problem Description === Op tech briefing, 2002/11/02 06:42 CST === “The item is locked in a Klein safe behind a painting in the second-floor library. Klein safes are extremely rare; most of them, along with Klein and his factory, were destroyed in World War II. Fortunately old Brumbaugh from research knew Klein’s secrets and wrote them down before he died. A Klein safe has two distinguishing features: a combination lock that uses letters instead of numbers, and an engraved quotation on the door. A Klein quotation always contains between five and twelve distinct uppercase letters, usually at the beginning of sentences, and mentions one or more numbers. Five of the uppercase letters form the combination that opens the safe. By combining the digits from all the numbers in the appropriate way you get a numeric target. (The details of constructing the target number are classified.) To find the combination you must select five letters v, w, x, y, and z that satisfy the following equation, where each letter is replaced by its ordinal position in the alphabet (A=1, B=2, …, Z=26). The combination is then vwxyz. If there is more than one solution then the combination is the one that is lexicographically greatest, i.e., the one that would appear last in a dictionary.”

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    HDOJ/HDU 1015 Safecracker(深搜)

    Problem Description === Op tech briefing, 2002/11/02 06:42 CST === “The item is locked in a Klein safe behind a painting in the second-floor library. Klein safes are extremely rare; most of them, along with Klein and his factory, were destroyed in World War II. Fortunately old Brumbaugh from research knew Klein’s secrets and wrote them down before he died. A Klein safe has two distinguishing features: a combination lock that uses letters instead of numbers, and an engraved quotation on the door. A Klein quotation always contains between five and twelve distinct uppercase letters, usually at the beginning of sentences, and mentions one or more numbers. Five of the uppercase letters form the combination that opens the safe. By combining the digits from all the numbers in the appropriate way you get a numeric target. (The details of constructing the target number are classified.) To find the combination you must select five letters v, w, x, y, and z that satisfy the following equation, where each letter is replaced by its ordinal position in the alphabet (A=1, B=2, …, Z=26). The combination is then vwxyz. If there is more than one solution then the combination is the one that is lexicographically greatest, i.e., the one that would appear last in a dictionary.”

    02

    Nat. Commun. | scGNN,一种新型的用于单细胞RNA测序分析的图神经网络框架

    今天给大家介绍密苏里大学许东教授和俄亥俄州立大学马勤教授的团队发表在Nature Communications上的一篇文章 “scGNN is a novel graph neural network framework for single-cell RNA-Seq analyses”。单细胞RNA测序 (scRNA-seq) 被广泛应用于揭示组织、生物和复杂疾病的异质性和动力学,但其分析仍面临多个重大挑战,包括测序的稀疏性和基因表达的复杂差异模式。本文提出了scGNN (单细胞图神经网络),为scRNA-seq分析提供了一个无假设的深度学习框架。这个框架用图神经网络来表达和聚集细胞间的关系,并使用左截断的混合高斯模型来建模异质基因表达模式。scGNN集成了三种迭代多模态自动编码器,其在四个scRNA-seq基准数据集上的基因插补和细胞聚类性能优于现有工具。在一项阿尔茨海默症研究中,从死后脑组织中提取13214个单核,scGNN成功地阐明了疾病相关的神经发育和差异机制。scGNN为基因表达和细胞间关系的有效表达提供了帮助。它也是一个强大的可以应用于一般的scRNA-Seq分析的框架。

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    【下载】NLP绝佳入门经典图书《NLTK-Python自然语言处理》中英文版, 教程+代码手把手带你实践NLP算法

    【导读】作为自然语言处理的经典图书教程,从输入法联想提示(predictive text)、email 过滤到自动文本摘要、机器翻译,大量的语言相关的技术都离不开自然语言处理的支持,而这本书提供了自然语言处理非常方便的入门指南。通过它,你将学到如何写能处理大量非结构化文本的Python 程序。你将获得有丰富标注的涵盖语言学各种数据结构的数据集,而且你将学到分析书面文档内容和结构的主要算法。通过大量的例子和联系,《PYTHON 自然语言处理》将会帮助你: 从非结构化文本中提取信息,无论是猜测主题还是识别“命名

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    学界 | 伯克利 AI 实验室博客发布首篇文章:让神经网络自行选择模块,实现动态推理

    深度神经网络虽然在图像,语音,机器人等方面取得了巨大的成功,但是这些成功通常局限在识别任务或者生成任务中,对于推理任务,常规的神经网络通常是无能为力的。伯克利AI实验室近期开通了博客,该博客的第一篇文章针对推理任务,提出了神经模块网络,通过训练多个神经网络模块完成推理任务,每个神经网络模块负责一个推理步骤,对于不同的推理任务,动态的组合这些模块,以生成针对不同问题的新网络结构。 该文章的作者为 Jacob Andreas , AI 科技评论了解到,他是伯克利 NLP 四年级博士生,也是 BAIR 实验室成员

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