This new, thoroughly revised edition of the acclaimed Cambridge Encyclopedia of Language incorporates the major developments in language study which have taken place since the mid 1990s. Two main new areas have been added: the rise of electronic communication in all its current forms from email to texting, and the crisis affecting the world's languages, of which half are though...(展开全部)

Where did human language come from? How many languages are there? How do we acquire our first language or learn a second one? The highly acclaimed Cambridge Encyclopedia of Language by David Crystal answers these and other questions about language. From hieroglyphics to trucker talk, from Shakespeare in pidgin to sneezing in Tongan, this is a stimulating and richly illustrated ...(展开全部)

Being an amateur astronomer is great fun, with many different and interesting areas to get involved in. This complete reference provides a wealth of practical information covering all aspects of amateur astronomy. Organised thematically for ease of use, it covers observing techniques, telescopes and observatories, Internet resources, and the objects that can be studied. Those n...(展开全部)

Being an amateur astronomer is great fun, with many different and interesting areas to get involved in. This complete reference provides a wealth of practical information covering all aspects of amateur astronomy. Organised thematically for ease of use, it covers observing techniques, telescopes and observatories, Internet resources, and the objects that can be studied. Those n...(展开全部)

In 1993 the first edition of ELL (Ron Asher, Editor) was hailed as “the field’s standard reference work for a generation”. Now the all-new second edition matches ELL’s comprehensiveness and high quality, expanded for a new generation, while being the first encyclopedia to really exploit the multimedia potential of linguistics. The most authoritative, up-to-date, comprehensive, ...(展开全部)

In 1993 the first edition of ELL (Ron Asher, Editor) was hailed as “the field’s standard reference work for a generation”. Now the all-new second edition matches ELL’s comprehensiveness and high quality, expanded for a new generation, while being the first encyclopedia to really exploit the multimedia potential of linguistics. The most authoritative, up-to-date, comprehensive, ...(展开全部)

Secret societies, assassination plots, cover-ups, and covert actions - these are the theories and shadows that influence politics, business, and even our daily lives. The truth is always out there, but what truth you believe depends on what you already know. Categorized into specific areas of interest, Conspiracy Encyclopedia is an essential guide to the many and varied theorie...(展开全部)

《交易策略百科全书》目录 前言 导言 一个完整的机械交易系统的应该是什么样的？ 如何才算是良好的进场点和出场点？ 系统开发的科学方法、如此方法所需的工具和资料。 第一部分 交易的工具 导言 第一章 数据 数据的类别 数据的时间周期 数据的品质 数据源及数据提供商 第二章 模拟器 模拟器的种类 模拟器的程序化 模拟器输出： 绩效总结报告 逐笔交易报告 模拟器的性能表现：速度、容量、复杂运算能力。 模拟器的可靠性 选择合适的模拟器 本书所用到的模拟器 第三章 优化器和优化过程 优化器的使用 优化器如何工作 优化的分类： 基于经验感觉的优化 全市场遍历优化 受控制优化 遗传算法优化 模拟退火优化 解析优化器 线性设计优化 无效优化的几个原因： 样本量太少 参数集过大 变量无验证 有效优化的几个前提： 样本量要大 交易系统的够成条件及参数数量要少 变量要验证...(展开全部)