THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON

The Design and Analysis of Experiments

This book, written by two major figures in adaptive control, provides a wealth of material for researchers, practitioners, and students. While some researchers in adaptive control may note the absence of a particular topic, the book‘s scope represents a high-gain instrument. It can be used by designers of control systems to enhance their work through the information on many new theoretical developments, and can be used by mathematical control theory specialists to adapt their research to practical needs. The book is strongly recommended to anyone interested in adaptive control.

Adaptive Control

Microgrids are now emerging from lab benches and pilot demonstration sites into commercial markets, driven by technological improvements, falling costs, a proven track record, and growing recognition of their benefits. They are being used to improve reliability and resilience of electrical grids, to manage the addition of distributed clean energy resources like wind and solar photovoltaic (PV) generation to reduce fossil fuel emissions, and to provide electricity in areas not served by centralized electrical infrastructure. This review article (1) explains what a microgrid is, and (2) provides a multi-disciplinary portrait of today's microgrid drivers, real-world applications, challenges, and future prospects.

/pdf/microgrids-a-review-of-technologies-key-drivers-and-3wo8bifusj.pdf

Microgrids: A review of technologies, key drivers, and outstanding issues

The limitation of hot spot cooling in microchips represents an important hurdle for the electronics industry to overcome with coolers yet to exceed the efficiencies required. Nanotechnology-enabled heat sinks that can be magnetophoretically formed onto the hot spots within a microfluidic environment are presented. CrO2 nanoparticles, which are dynamically chained and docked onto the hot spots, establish tuneable high-aspect-ratio nanofins for the heat exchange between these hot spots and the liquid coolant. These nanofins can also be grown and released on demand, absorbing and releasing the heat from the hot spots into the microfluidic system. It is shown that both high aspect ratio and flexibility of the fins have a dramatic effect on increasing the heat sinking efficiency. The system has the potential to offer a practical cooling solution for future electronics.

Dynamic nanofin heat sinks

This paper presents a comprehensive review and assessment of the latest research and advancement of electric vehicles (EVs) interaction with smart grid portraying the future electric power system model. The concept goal of the smart grid along with the future deployment of the EVs puts forward various challenges in terms of electric grid infrastructure, communication and control. Following an intensive review on advanced smart metering and communication infrastructures, the strategy for integrating the EVs into the electric grid is presented. Various EV smart charging technologies are also extensively examined with the perspective of their potential, impacts and limitations under the vehicle-to-grid (V2G) phenomenon. Moreover, the high penetration of renewable energy sources (wind and photovoltaic solar) is soaring up into the power system. However, their intermittent power output poses different challenges on the planning, operation and control of the power system networks. On the other hand, the deployment of EVs in the energy market can compensate for the fluctuations of the electric grid. In this context, a literature review on the integration of the renewable energy and the latest feasible solution using EVs with the insight of the promising research gap to be covered up are investigated. Furthermore, the feasibility of the smart V2G system is thoroughly discussed. In this paper, the EVs interactions with the smart grid as the future energy system model are extensively discussed and research gap is revealed for the possible solutions.

Electric vehicles and smart grid interaction: A review on vehicle to grid and renewable energy sources integration

These days robot-industry development requires a new motor technology. Robot system is more complex than the other machine ones. They need the simplicity and light weight as robot systems. Moreover they have to become a high energy efficiency machine. For these reasons the 3-degrees of freedom permanent-magnet spherical motor is proposed instead of existing ones in this paper. The proposed motor model is analyzed by using FEA(finite element analysis) for comparing the results. Torque of the motor is simulated by derived torque function.

Using mathematical method of torque simulation for reducing calculation time of permanent magnet spherical wheel motor

A high-speed and high-power density electrical motor is needed for air compressor which supplies highly pressured air to fuel cell system. With the aid of high energy magnet materials and adjustable speed drives, the applications of high-efficiency and high-performance permanent magnet synchronous motors (PMSM) have been extensively increased. As a result, PMSM is the best suited candidate for this kind application from the viewpoint of efficiency, cost, compactness, ruggedness and thermal reliability. In this paper, two types rotor structure are considered. One is solid circular shape permanent magnet rotor and the other is circular ring shape. And retaining sleeves which made of stainless steel are installed on both rotors to protect permanent magnet from excessive centrifugal force. The mechanical and electromagnetic considerations were done to determine optimum retaining sleeve thickness. Finally, characteristic comparisons between two types of rotor are made.

A comparative study of high-speed permanent magnet synchronous motor for air compressor

Fabrication and electrical properties of YBa2Cu3O7-x thin film prepared by sol-gel method for uncooled infrared detectors

Cogging torque results from the interaction of the rotor magnets acting on the stator teeth or poles independent of any current It is desirable to reduce the cogging torque since it may cause speed ripple and vibration, particularly at light load and low speed When the motor equipped ring magnet, it is very effective to reduce the cogging torque as changing only the magnetization patterns of the permanent magnet in the same motor structure In this paper, optimum shape of magnetizing fixture resulting cogging torque reduction is investigated by using the finite element method (FEM), design of experiment (DOE) and response surface method (RSM)

Optimal design of a magnetization fixture for cogging torque reduction of ODD spindle motor

Since robot industry growing, the machine that could move with multi-DOF has been studied in many industrial fields. Spherical motor is one of the multi-DOF machine that doesn't need gear for multi-DOF motion. Unlike conventional motor, spherical motor can not only rotate on the shaft axis (rotating motion), but tilt the shaft with 2-DOF motion (positioning motion). In the typical type of spherical motor, one coil took part in positioning motion and rotating motion at the same time. As the result, the control algorithm was complex. To solve this problem, this study proposed a novel type of coil on the stator. The coils were separated for positioning motion and rotating motion. Thus the linkage flux of rotating coil didn't be affected the positioning angle. In this paper, comparing the back-EMF of typical and novel type was conducted and the driving experiment was carried out as the positioning angle. From the experiment result, the performance of proposed spherical motor could be verified.

Ju Lee

Papers

Using mathematical method of torque simulation for reducing calculation time of permanent magnet spherical wheel motor

A comparative study of high-speed permanent magnet synchronous motor for air compressor

Fabrication and electrical properties of YBa2Cu3O7-x thin film prepared by sol-gel method for uncooled infrared detectors

Optimal design of a magnetization fixture for cogging torque reduction of ODD spindle motor

A Study of Advanced Spherical Motor for Improvement of Multi-DOF Motion