You'll find the answers to hundreds of fascinating questionsdbout inventions inside this new children’S encyclopedia． ·Over 3 40 fascinating questions and answers ·Dates for keg inventions at a glance ·Index of famous inventors ·Over 2 00 photographs ·More thQn 2 5 0 illustrationsJ cutawag diagrams an d cartoons

PROVIDES DETAILED DESCRIPTIONS TO ENABLE EASY IDENTIFICATION OF NUMEROUS DIFFERENT SPECIES FOUND ON THE SEASHORES OF THE WORLD .ILLUSTRATED THROUGHOUT WRTH SUPERB COLOR PHOTOGRAPHS .FACT BOXES AND LOCATOR MAPS PROVIDE ESSENTIAL INFORMATION ABOUT TAXONOMY ,DISTRIBUTION,AND SIZE.

It's hard to talk about The Origin of Species without making statements that seem overwrought and fulsome. But it's true: this is indeed one of the most important and influential books ever written, and it is one of the very few groundbreaking works of science that is truly readable. To a certain extent it suffers from the Hamlet problem--it's full of clichés! Or what are now clichés, but which Darwin was the first to pen. Natural selection, variation, the struggle for existence, survival of the fittest: it's all in here. Darwin's friend and "bulldog" T.H. Huxley said upon reading the Origin, "How extremely stupid of me not to have thought of that." Alfred Russel Wallace had thought of the same theory of evolution Darwin did, but it was Darwin who gathered the mass of supporting evidence--on domestic animals and plants, on variability, on sexual selection, on dispersal--that swept most scientists before it. It's hardly necessary to mention that the book is still controversial: Darwin's remark in

In The Origin of Species Darwin outlined his theory of evolution, which proposed that species had been evolving and differentiating over time under the influence of natural selection. On its publication it became hugely influential, bringing about a seismic shift in the scientific view of humanity's place in the world that is still controversial today. It is both a brilliant work of science and also a clear, vivid and at times even moving, piece of writing that reflects both Darwin's genius and his boundless enthusiasm for the natural world.With an Afterword by Oliver Francis,

Full of Lively answers to all those tricky questions about how the world works，I Wonder Why books are a brilliant way to keep young minds buzzing。With information and quirky facts to explain everything from‘Which insect tastes with its toes？to ‘How do grasshoppers play the violin？，I Wonder Why Spiders Spin Webs will amaze，amuse，satisfy and inspire！

本书从物理学而不是数学概念的角度介绍了动力系统中均匀双曲吸引子目前的进展。结构稳定的吸引子表现出强烈的随机性，但是对于动力系统中函数和参数的变化不敏感。基于双曲混沌的特征，本书将展示如何找到物理系统中的双曲混沌吸引子，以及怎样设计具有双曲混沌的物理系统。本书可以作为本科高年级和研究生教材，也可以供大学教授以及物理学、机械学和工程学相关研究人员参考。Kuznetsov 博士是非线性和混沌动力学方面的著名科学家。他是俄罗斯萨拉托夫国立大学非线性过程系的教授，已经出版了三本混沌动力学及其应用方面的专著。关键词：动力系统、混沌、奇怪吸引子, Plykin 吸引子, Smale – Williams 吸引子, 双曲吸引子

本书从物理学而不是数学概念的角度介绍了动力系统中均匀双曲吸引子目前的进展。结构稳定的吸引子表现出强烈的随机性，但是对于动力系统中函数和参数的变化不敏感。基于双曲混沌的特征，本书将展示如何找到物理系统中的双曲混沌吸引子，以及怎样设计具有双曲混沌的物理系统。本书可以作为本科高年级和研究生教材，也可以供大学教授以及物理学、机械学和工程学相关研究人员参考。Kuznetsov 博士是非线性和混沌动力学方面的著名科学家。他是俄罗斯萨拉托夫国立大学非线性过程系的教授，已经出版了三本混沌动力学及其应用方面的专著。关键词：动力系统、混沌、奇怪吸引子, Plykin 吸引子, Smale – Williams 吸引子, 双曲吸引子

Grade 2-5 Cole and Degen have struck at the core once again to produce an exciting，attractive，and informative science book for young readers。Children who entered Ms。Frizzle’s classroom in The Magic School Bus at the Waterworks （Scholastic，1986），are in for another exhuberant，intriguing field trip。This time， it’s to the center of the earth。Surprises abound through each strata down to the very inner core where it is hot，hot，hot。The class collects rock samples before the bus is expelled from the earth’s core in a volcanic eruption。Illustrations are in watercolor cartoon format and attendant “balloons” contain pertinent information or students’humorous asides。There are also pages from students’reports on rocks。A tongue-in-cheek section at the end discusses the real and fantasy aspects of the book。Containing uncluttered text and illustrations， it is an anticipatory page-turner full of exciting adventure from school yard to volcano and back。Mary Lou Budd， Mil

Licklider was a brilliant scientist whose essential contributions to cognitive psychology and cybernetics included critical early developments in the field of man-machine interaction. However, his original work is often overshadowed by his accomplishments as a teacher, administrator and project leader and this ably written and well-researched biography isn't likely to propel him into the limelight. Waldrop (Man-Made Minds) devotes about 20% of the book to Licklider himself; the rest covers his teachers, colleagues and students at MIT and the Pentagon including computing pioneers Douglas Engelbart, Wes Clark and Larry Roberts and Licklider's indirect influence on the development of personal computers and the Internet (via "the world's first large-scale experiment in personal computing" at MIT). To his credit, Waldrop avoids common stereotypes of computer nerds or saints, delivering a vivid account of Licklider and his contemporaries. But he was not able to interview Licklider (who died in 1990), nor does he in

Foundation and Empire (英语) 简装 内容简介 The Foundation has managed to preserve humanculture and shorten the period of chaotic barbarism after the Galactic Empire began to decay. But the Foundation still faces great challenges in its struggle to survive. 《基地与帝国》是 基地 系列三部曲中的第二部。此时，由伟大的心里史学家哈里 谢顿所创立的基地，虽然已在银河外缘立稳了脚跟，但还得面对来自银河帝国的压力。 垂死的帝国仍拥有银河中最强大的武力。一位野心勃勃的将军，率太空舰队攻向基地，聚居在基地小行星上的学者和科学家，能逃过大难的一线希望，全维系在谢顿死前留下的语言中 可是，就连谢顿当年也无法预料到：还有比太空军团更具有威胁性的外力已悄然诞生，那就是银河中的突变异种 骡 。面对骡奇异的心灵力量，即使是一支最坚强的人，也会俯首屈服，成为听话