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)

- The book argues that ignorance, not knowledge, is what drives science - The book provides a fascinating inside-view of the way every-day science is actually done - The book features intriguing case histories of how individual scientists use ignorance to direct their research Knowledge is a big subject, says Stuart Firestein, but ignorance is a bigger one. And it is ignorance—...(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)

Apple is the world's most iconic company. It creates products that people fall in love with - and then markets them with spectacular success. Ken Segall has been behind much of that marketing for many years. He created the 'i', encouraged us to 'Think Different', and in the process played a key role in Apple's resurrection. Now he gives us a rare insight into one of the core pr...(展开全部)

肯·西格尔 曾担任NeXT和苹果公司的创意总监，与史蒂夫·乔布斯共事17年的广告狂人。 在苹果的复兴过程中起到了关键作用，帮助苹果创造了至关重要的营销活动“不同凡想”（Think Different），还参与了iMac等的命名。这个命名方式为“i”系列产品的热潮埋下了伏笔。

"Simple can be harder than complex. You have to work hard to get your thinking clean to make it simple. But its worth it in the end, because once you get there, you can move mountains". (Steve Jobs, "BusinessWeek", May 25, 1998). To Steve Jobs, Simplicity wasn't just a design principle. It was a religion and a weapon. The obsession with Simplicity is what separates Apple from o...(展开全部)

“Darwin Comes to Town casts a radical new light on the way we should think about evolution: that it is not always a slow, lumbering process measured in millions of years, but, in fact, something that can take place at relative light speed under certain circumstances. Say, when it must adapt to the ecological pressures put on its habitat (a planet) dominated by human action, and...(展开全部)

“Darwin Comes to Town casts a radical new light on the way we should think about evolution: that it is not always a slow, lumbering process measured in millions of years, but, in fact, something that can take place at relative light speed under certain circumstances. Say, when it must adapt to the ecological pressures put on its habitat (a planet) dominated by human action, and...(展开全部)

布伦达·伯查德（Brendon Burchard） 世界上薪酬最高的高效能教练和培训师 一手创办的高效能学院（High Performance Academy）享誉世界，成为个人发展和高效能领域的标杆。这是一个培养成功者和专家学者的传奇个人发展项目，也是为激励作家、演讲家、人生教练、网上思想领袖的最综合的市场训练项目。 布伦达的客户包括来自世界上59个国家的企业和行政管理人，他的建议和训练被广泛用于埃森哲咨询公司、美国铝业、亚马逊、美国海军军官学校，以及全世界排名前50名大学中的34所大学。 作家 《纽约时报》畅销书TOP1《专业化生存》作者。 亚马逊畅销书TOP1《黄金人生的入场券》作者。 《充电》刚上市，便已跃升各大排行榜榜首。 布伦达的书、影碟、产品等，如今每个月都会激励世界上的200多万人。 公共影响力 CNN金牌主播安德森·库伯、《...(展开全部)