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phenomenon

ESD - RF Technology and Circuits

The phenomenon of electrostatic discharge (ESD) has been known for a long time, but recently a growing interest has been observed in ESD in radio frequency (RF) technology and ESD issues in RF applications.

標簽： Technology Circuits ESD and RF

上傳時間： 2020-06-05

上傳用戶：shancjb
ESD+Circuits+and+Devices

In the field of electricity, electrostatics, and circuit theory, there are many discoveries and accomplishments that have lead to the foundation of the field of electrostatic discharge (ESD) phenomenon. Below is a chronological list of key events that moved the field of electrostatics forward:

標簽： Circuits Devices ESD and

上傳時間： 2020-06-05

上傳用戶：shancjb
Deploying+Raspberry+Pi+in+the+Classroom

The Raspberry Pi has become a computing phenomenon. This single-board miniature computer, first released in February 2012 by the Raspberry Pi Foundation, has grown into a series of nearly a dozen models that have sold a total of more than 10 million units in five years. Inexpensive to buy and to run, Raspberry Pi computers are great for enthusiasts, good for games, and fun for children. Raspberry Pi computers are also terrific in the classroom, enabling you to put on each desk an easily-manageable computer on which students can do everything from learning Internet use and essential office software skills, through grasping programming basics in an easy-to-learn format, to performing full-on programming in Python, Java, C, and other languages. Better yet, you can install all the software needed for those activities automatically alongside the operating system.

標簽： Deploying Classroom Raspberry the Pi in

上傳時間： 2020-06-06

上傳用戶：shancjb
Mobile+Information+Systems+Leveraging

Since OpenStreetMap (OSM) appeared more than ten years ago, new collaborative mapping approaches have emerged in different areas and have become important components of localised information and services based on localisation. There is now increased awareness of the importance of the space-time attributes of almost every event and phenomenon. Citizens now have endless possibilities to quickly geographically locate themselves with an accuracy previously thought impossible. Based on these societal drivers, we proposed a number of collaborative mapping experiments (“mapping parties”) to delegates of a large open-source geospatial conference and to citizens of the conference’s host city during July 2015.

標簽： Information Leveraging Systems Mobile

上傳時間： 2020-06-09

上傳用戶：shancjb
Practical Arduino Cool Projects

phenomenon is an overused and overloaded term, but somehow it seems appropriate for Arduino—an endeavor that has caught the attention of an astonishingly wide range of people and provided opportunities for those who might otherwise have never picked up a soldering iron or written a single line of code. From dyed-in-the-wool hardware hackers to web page developers, robotics enthusiasts to installation artists, textile students to musicians: all can be found in the Arduino community. The versatility of the platform encompassing both hardware and software, combined with its inherent openness, has captured the imagination of tens of thousands of developers.

標簽： Practical Projects Arduino Cool

上傳時間： 2020-06-09

上傳用戶：shancjb
基于滑模觀測器與分數階鎖相環的無傳感器PMSM矢量控制

Abstract: A sliding mode observer and fractional-order phase-locked loop (FO-PLL) method is proposed for the sensorless speed control of a permanent magnet synchronous motor (PMSM).The saturation function is adopted in order to reduce the chattering phenomenon caused by the sliding mode observer. In this proposed FO-PLL, method, a regulable fractional order r is involved, which means that the FO-PLL provides an extra degree of freedom. In fact, the conventional phase-locked loop (PLL) applied in sensorless PMSM control can be seen as a special case of the proposed FO-PLL. By selecting a proper fractional order r a better performance may be achieved. The computer simulation results demonstrate the effectiveness of the proposed method.Key words: fractional calculus; fractional order phase-locked loop; sensorless control; sliding mode observer; permanent magnet synchronous motor; speed controll

標簽： 滑模觀測器傳感器 pmsm 矢量控制

上傳時間： 2022-06-18

上傳用戶：

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