Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 648
Book Description
The 22nd Annual Precise Time and Time Interval (PTTI) Applications and Planning Meeting
Author: Proceedings of the ... Annual Symposium on Frequency Control
Author: Publisher:
ISBN:
Category : Frequency response (Electrical engineering)
Languages : en
Pages : 744
Book Description
Frequency Standards and Metrology
Author: Andrea De MarchiPublisher: Springer Science & Business Media
ISBN: 3642745016
Category : Science
Languages : en
Pages : 493
Book Description
Since the previous Symposium, several exciting new developments and advances have occurred in the field of frequency standards and metrology. These include the first results on the long-tenn stability of a millisecond Pulsar, for which data 14 integrated over several years now show a stability of around 10- . Improvements in the understanding of various biases in Cesium beam standards promise accuracies in the low 14s for primary standards and in the low 13s for short commercial tubes, for which long tenn stabilities in low 14s have already been shown to be obtainable by accuracy improvement. Beams using optical pumping for state selection and for detection have been operated with excellent results, and more are being realized. Other new frequency standards which have appeared include a macroscopic rf trap with Mercury ions, which perfonns in the low 15s in one day, the sub millimeter metastable Magnesium beam, which has shown a short tenn stability 19 in the low 12s in one second and promises an accuracy of 10- , and the cold Hydrogen masers, which have such high stabilities that they cannot be measured with existing local oscillators. Prospects for future developments include laser manipulation of neutrals and spectroscopy of single ions at rest in a trap. Both these groups of techniques have great potential for unprecedented accuracy and short-and long-tenn stability, and new superior frequency standards are expected to be realizable in this way in the not too distant future.
Proceedings of the 4th Brazilian Technology Symposium (BTSym'18)
Author: Yuzo IanoPublisher: Springer
ISBN: 303016053X
Category : Technology & Engineering
Languages : en
Pages : 651
Book Description
This book presents the Proceedings of The 4th Brazilian Technology Symposium (BTSym'18). Part I of the book discusses current technological issues on Systems Engineering, Mathematics and Physical Sciences, such as the Transmission Line, Protein-modified mortars, Electromagnetic Properties, Clock Domains, Chebyshev Polynomials, Satellite Control Systems, Hough Transform, Watershed Transform, Blood Smear Images, Toxoplasma Gondi, Operation System Developments, MIMO Systems, Geothermal-Photovoltaic Energy Systems, Mineral Flotation Application, CMOS Techniques, Frameworks Developments, Physiological Parameters Applications, Brain Computer Interface, Artificial Neural Networks, Computational Vision, Security Applications, FPGA Applications, IoT, Residential Automation, Data Acquisition, Industry 4.0, Cyber-Physical Systems, Digital Image Processing, Patters Recognition, Machine Learning, Photocatalytic Process, Physical-chemical analysis, Smoothing Filters, Frequency Synthesizers, Voltage Controlled Ring Oscillator, Difference Amplifier, Photocatalysis and Photodegradation. Part II of the book discusses current technological issues on Human, Smart and Sustainable Future of Cities, such as the Digital Transformation, Data Science, Hydrothermal Dispatch, Project Knowledge Transfer, Immunization Programs, Efficiency and Predictive Methods, PMBOK Applications, Logistics Process, IoT, Data Acquisition, Industry 4.0, Cyber-Physical Systems, Fingerspelling Recognition, Cognitive Ergonomics, Ecosystem services, Environmental, Ecosystem services valuation, Solid Waste and University Extension. BTSym is the brainchild of Prof. Dr. Yuzo Iano, who is responsible for the Laboratory of Visual Communications (LCV) at the Department of Communications (DECOM) of the Faculty of Electrical and Computing Engineering (FEEC), State University of Campinas (UNICAMP), Brazil.
Proceedings of the Fourth International Symposium on Semiconductor Wafer Bonding
Author: U. GöselePublisher: The Electrochemical Society
ISBN: 9781566771894
Category : Technology & Engineering
Languages : en
Pages : 636
Book Description
Scientific and Technical Aerospace Reports
Author: Research in Progress
Author: Direct Digital Frequency Synthesizers
Author: Venceslav F. KroupaPublisher: John Wiley & Sons
ISBN: 0780334388
Category : Technology & Engineering
Languages : en
Pages : 402
Book Description
With the advent of integrated circuits (IC), digital systems havebecome widely used in modern electronic devices, includingcommunications and measurement equipment. Direct Digital FrequencySynthesizers (DDS) are used in communications as transmitterexciters and local oscillators in receivers. The advantages aresuperior frequency stability, the same as that of the driving clockoscillator, and short switching times. The difficulties are loweroutput frequencies and rather large spurious signals. Compiled for practicing engineers who do not have theprerequisite of a specialist's knowledge in Direct DigitalFrequency Synthesizers (DDS), this collection of 40 importantreprinted papers and 9 never-before published contributionspresents a comprehensive introduction to DDS properties and a clearunderstanding of actual devices. The information in this volume canlead to easier computer simulations and improved designs. Featured topics include: * Discussion of principles and state of the art of wide-rangeDDS * Investigation of spurious signals in DDS * Combination of DDS with Phase Lock Loops (PLL) * Examination of phase and background 'noise' in DDS * Introduction to Digital to Analog Conversion (DAC) * Analysis of mathematics of quasiperiodic omission ofpulses DDFS can also serve as a textbook for students seeking essentialbackground theory.
Digital Clocks for Synchronization and Communications
Author: Masami KiharaPublisher: Artech House
ISBN: 9781580537650
Category : Technology & Engineering
Languages : en
Pages : 278
Book Description
If you need an in-depth understanding of the digital clock technologies used in building today's telecommunications networks, this authoritative and practical book is a smart choice. Providing you with critical details on the PLL (phase-locked Loop) technique for clock synchronization and generation, and the DDS (direct digital synthesizer) technique for clock generation, the book helps you achieve synchronization in high-speed networks and frequency stabilization in portable equipment.
Memoirs
Author: Tōkyō Toritsu Daigaku. KōgakubuPublisher:
ISBN:
Category : Engineering
Languages : en
Pages : 1054
Book Description