Qian Liu Libros

Explore easy, automated, and low-cost ways to invest using online platforms In The Little Book of Robo How to Make Money While You Sleep , a pair of long-time investors and founding team members at the pioneering and award-winning online investment platform Wealthfront deliver a fun, invaluable, and simple roadmap to making your money make money. You’ll learn how to start investing with the easy, automated, and low-cost strategies that robo investment advisors have made super accessible to everyday people. You don’t need a ton of detailed knowledge about the financial and investment sectors to make impressive returns. The authors walk you through how to use techniques like automation, diversification and indexing to manage your risk and keep things absurdly simple. You’ll also Perfect for working professionals, members of young and growing families, and people beginning to think about their retirement plans, The Little Book of Robo Investing is a straightforward, engaging, and fun read that will get you ready to put your money to work intelligently and responsibly.

In this dissertation, different controllers for the electrical drive systems in a novel wind turbine are designed and implemented. In order to reduce the power class of the converter and its corresponding grid side filter in the large scale wind turbines, a mechanical power split, which is realized by a planetary gearbox, is introduced for the wind turbine. The split power is delivered to a synchronous generator a permanent magnet excited synchronous machine (servo PMSM). The synchronous generator is directly connected to the power grid without any power electronic devices. Meanwhile, the servo PMSM is controlled by a small scale converter connecting to the power grid. It is theoretically proven in this dissertation that the rated power of the servo PMSM and the corresponding converter can be less than 10% of the rated power of the wind turbine. To minimize the rated power of the servo PMSM and the converter, it is expected that the servo PMSM is able to be operated in the deep field weakening region. Moreover, high level of safety and robustness, fast torque dynamics and small torque ripples are also required by the servo PMSM drive system.

Novel Optical Technologies for Nanofabrication describes recent advances made in micro/nanofabrication with super-resolution laser technologies, which are based on the latest research findings in the authors’ groups. It focuses on new  techniques and methods as well as applications and development trends  in laser nanofabrication, including super-resolution laser direct writing,  surface structures composed of laser path-guided wrinkle, three-dimensional laser nanofabrication based on  two-photon absorption, and nanofabrication by laser interference and surface plasmon polaritons. This book serves as a reference for academic researchers, engineers, technical professionals and graduate students in the fields of micro/nanotechnology, thin film materials, super-resolution optics and laser techniques. Qian Liu is a Professor at Laboratory for Nanodevice, National Center for Nanoscience and Technology, China. Xuanming Duan is a Professor at the Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, China Changsi Peng is a Professor at the Institute of Information Optical Engineering, Soochow University, China.