Sci-fi makes it look so easy. Receive a distress call from Alpha Centauri? No problem: punch the warp drive and you're there in minutes. Facing a catastrophe that can't be averted? Just pop back in the timestream and stop it before it starts. But for those of us not lucky enough to live in a science-fictional universe, are these ideas merely flights of fancy - or could it reall...(展开全部)

From the acclaimed author of The Information and Chaos, here is a mind-bending exploration of time travel: its subversive origins, its evolution in literature and science, and its influence on our understanding of time itself. The story begins at the turn of the previous century, with the young H. G. Wells writing and rewriting the fantastic tale that became his first book and ...(展开全部)

“Time travel” — and its hazards—are made literal in this astonishing new novel in which a recklessly idealistic girl dares to test the perimeters of her tightly controlled (future) world and is punished by being sent back in time to a region of North America — “Wainscotia, Wisconsin”—that existed eighty years before. Cast adrift in time in this idyllic Midwestern town she is s...(展开全部)

This best-selling book employs a theoretical, practical, multidisciplinary approach to provide introductory users with a broad understanding of modern electric power. The scope of the book reflects the rapid changes that have occurred in power technology over the past few years–allowing the entrance of power electronics into every facet of industrial drives, and expanding the f...(展开全部)

在准备本书第6版时，我想将一些对电力系统有较大影响的新内容介绍给大家，其中有以下5部分内容。 第13章、12.23～12.26节介绍了双馈感应电机的原理与特性。该电机的调速可通过在定子加固定频率交流电，而在转子通入可变频率交流电来实现，故名为“双馈”。双馈电机原来用作变速电动机来驱动大型水泵等负载，现在，该电机在风力发电中作为双馈发电动机使用。由于风力发电的重要性，有必要在本书中介绍这种特殊的电机。 第21章、21.45～21.51节对PWM的相关内容作了重要的修改，增加了新的内容及图片。 第23章介绍了几种电动机调速的电子控制方法。23.31～23.40节特别介绍了直接转矩控制（DTC）方法，与应用PWM及矢量控制方法不用，DTC使用了砰砰控制法，其对速度及转矩的控制与其他方法不同，该章根据感应电机原理，对此做了直观的分析。 第24章、24...(展开全部)

约翰尼斯•费边，著名人类学家，曾在美国西北大学、卫斯理学院等多所大学执教，担任波恩大学、科隆大学、巴黎大学的访问学者。退休前任教于荷兰阿姆斯特丹大学，现居德国。他写了很多批评性的著作，《时间与他者》是他的代表作，这本书是人类学领域的经典著作，改变了人类学家“建立研究对象”的方法。

"What is the meaning of being?" This is the central question of Martin Heidegger's profoundly important work, in which the great philosopher seeks to explain the basic problems of existence. A central influence on later philosophy, literature, art, and criticism—as well as existentialism and much of postmodern thought— Being and Time forever changed the intellectual map of the...(展开全部)

One of the most important philosophical works of our time -- a work that has had tremendous influence on philosophy, literature, and psychology, and has literally changed the intellectual map of the modern world.</P>

布鲁斯·G·特里格（1937-2006），世界著名考古学家，被誉为考古学界一位真正的文艺复兴式人物。生前系加拿大麦吉尔大学人类学系教授，加拿大皇家学会会员，苏格兰古物家学会、英国史前学会荣誉会员。先后在埃及与苏丹从事考古学研究。兴趣包括早期文明的比较研究、考古学史、考古学与人类学理论。由于在社会科学方面的杰出贡献，他曾获得多项学术奖励，包括魁北克政府授予的声誉极高的莱昂－热兰奖。他有大量著作问世，除本书外，尚有《超越历史：史前史的方法》、《时间与传统》、《剑桥美洲土著史》第一卷（合编）、《理解早期文明》等。

Since its foundation in 1989, Warp Records has become a synonym for futuristic adventures in sound and vision. WARP tells the story of how a small Sheffield dance label grew to foster an international range of artists including Aphex Twin, LFO, Autechre, Boards Of Canada, Squarepusher, Broadcast, Vincent Gallo, Tortoise, Antipop Consortium, Maximo Park, Jimi Tenor, Plaid and Pr...(展开全部)