Xem 1-20 trên 30 kết quả Signal acquisition
  • Global Navigation Satellite System (GNSS) plays a key role in high precision navigation, positioning, timing, and scientific questions related to precise positioning. This is a highly precise, continuous, all-weather, and real-time technique. The book is devoted to presenting recent results and developments in GNSS theory, system, signal, receiver, method, and errors sources, such as multipath effects and atmospheric delays

    pdf0p cucdai_1 16-10-2012 41 9   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Weak GPS Signal Acquisition Algorithm Based on Chaotic Oscillator

    pdf6p dauphong15 18-02-2012 20 2   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: PN Sequence Preestimator Scheme for DS-SS Signal Acquisition Using Block Sequence Estimation

    pdf8p dauphong20 11-03-2012 15 2   Download

  • Today, the data acquisition technology has found its way into virtually every segment of electronics. A digital signal processing (DSP) system accepts analog signals as input, converts those analog signals to numbers, performs computations using the numbers and eventually converts the results of the computations back into analog signals. Once converted to numbers, signals are unconditionally stable. Error detection and correction methods can be applied to store,transmit and reproduce numbers with no corruption. Signals stored digitally are really just large arrays of numbers.

    pdf351p namde01 11-04-2013 30 7   Download

  • Today, the data acquisition technology has found its way into virtually every segment of electronics. A digital signal processing (DSP) system accepts analog signals as input, converts those analog signals to numbers, performs computations using the numbers and eventually converts the results of the computations back into analog signals. Once converted to numbers, signals are unconditionally stable. Error detection and correction methods can be applied to store, transmit and reproduce numbers with no corruption....

    pdf352p greengrass304 15-09-2012 21 3   Download

  • This paper describes a novel approach towards the empirical approximation of discourse relations between different utterances in texts. Following the idea that every pair of events comes with preferences regarding the range and frequency of discourse relations connecting both parts, the paper investigates whether these preferences are manifested in the distribution of relation words (that serve to signal these relations).

    pdf5p nghetay_1 07-04-2013 15 2   Download

  • Loss of tumor suppressors contributes to numerous cancer types. Many, but not all, proteins encoded by tumor suppressor genes have antiproliferative activity and halt cell-cycle progression. In this chapter, we present three methods that have been utilized to monitor the antimitogenic action exerted by tumor suppressors. Tumor suppressor function can be demonstrated by colony formation assays and acquisition of the flat-cell phenotype.

    pdf291p tom_123 15-11-2012 14 1   Download

  • Beginning with modest initial attempts in roughly the 1960s, digital image processing has become a recognized field of science, as well as a broadly accepted methodology, to solve practical problems in many different kinds of human activities. The applications encompass an enormous range, starting perhaps with astronomy, geology, and physics, via medical, biological, and ecological imaging and technological exploitation, up to the initially unexpected use in humane sciences, e.g., archaeology or art history.

    pdf725p echbuon 02-11-2012 41 16   Download

  • We live in a time when digital information plays a key role in various fields. Whether we look towards communications, industry, medicine, scientific research or entertainment, we find digital images to be heavily employed. The high volume of stored and transacted digital images, together with the increasing availability of advanced digital image acquisition and display techniques and devices, came with a growing need for novel, fast and intelligent algorithms for the digital manipulation of digital images....

    pdf208p greengrass304 15-09-2012 44 12   Download

  • Rapid technological developments in the last century have brought the field of biomedical engineering into a totally new realm. Breakthroughs in materials science, imaging, electronics and, more recently, the information age have improved our understanding of the human body. As a result, the field of biomedical engineering is thriving, with innovations that aim to improve the quality and reduce the cost of medical care.

    pdf420p cucdai_1 22-10-2012 36 11   Download

  • Figliola and Beasleys Fifth Edition provides revised material for engineering practice with important updates on coverage of probability and statistics and uncertainty analysis, including added material on Monte Carlo simulation, digital image processing, and with revised coverage of signal acquisition, conditioning, and processing.

    pdf605p blackhole7293 17-04-2015 19 11   Download

  • Awareness of one’s environment is important in everyday life situations for humans, animals and in various scientifi c and engineering applications. Living organisms can observe their surroundings using their senses, whereas man-made systems need to be equipped with diff erent sensors (e.g. image, acoustic or touch). Whatever the nature of the signal acquisition system, be it technical or biological, an advanced processing of sensory data is needed in order to derive localization information....

    pdf0p ktcn_1 10-07-2012 31 9   Download

  • The idea of using ultrasonic waves in medical and engineering fields came from military applications of sound waves in sonar systems. Sokolov, Firestone, Simons, and several other researchers are among the ones who studied this high frequency kind of wave in the first half of twentieth century. Ultrasonic waves are defined as those with frequencies higher than 20 kHz. The constant development of data acquisition systems and probes seems to work, removing the upper limit of the wave frequency that can be acquired.

    pdf304p qsczaxewd 25-09-2012 35 9   Download

  • This title presents the general principles of instrumentation processes. It explains the theoretical analysis of physical phenomena used by standard sensors and transducers to transform a physical value into an electrical signal. The pre-processing of these signals through electronic circuits – amplification, signal filtering and analog-to-digital conversion – is then detailed, in order to provide useful basic information. Attention is then given to general complex systems.

    pdf0p camchuong_1 04-12-2012 36 9   Download

  • LABORATORY PROCEDURE I Sampling A. The time division Multiplexer (TDM MUX) module is used to recombine two analog signals into one data stream. The input A is connected to the OUT connector for a period T (T = 1/fs). During the next period, input B is connected to the OUT connector. The process then repeats. It should be obvious that each input, input A(or B) is “Sampled” at a rate equal to ½ fs as set by the Master clock. NOTE: The actual waveform sampling rate = ½ fs as set by the “DATA/Sampling RATE”, output, mentioned above (e.g. to...

    pdf18p longtuyenthon 27-01-2010 45 7   Download

  • Until fairly recently most scientific data-gathering systems and industrial control procedures were based on electromechanical devices such as chart recorders and analogue gauges. The capability to process and analyse data was rather limited (and in some cases error prone) unless one had access to a minicomputer or mainframe. Today, that situation has changed considerably. I am sure that most potential readers of this book will be aware of the profound effect the PC has had on the way in which engineers and scientists are able to approach data-gathering tasks....

    pdf483p camchuong_1 04-12-2012 22 7   Download

  • This book aims to provide information about Fourier transform to those needing to use infrared spectroscopy, by explaining the fundamental aspects of the Fourier transform, and techniques for analyzing infrared data obtained for a wide number of materials. It summarizes the theory, instrumentation, methodology, techniques and application of FTIR spectroscopy, and improves the performance and quality of FTIR spectrophotometers.

    pdf0p cucdai_1 20-10-2012 26 6   Download

  • LINEAR SIGNAL CONDITIONING TO SIX-SIGMA CONFIDENCE INTRODUCTION Economic considerations are imposing increased accountability on the design of analog I/O systems to provide performance at the required accuracy for computerintegrated measurement and control instrumentation without the costs of overdesign. Within that context, this chapter provides the development of signal acquisition and conditioning circuits, and derives a unified method for representing and upgrading the quality of instrumentation signals between sensors and data-conversion systems....

    pdf20p huggoo 20-08-2010 46 5   Download

  • In this paper we present the implementation of a digital lock-in amplifier (LIA) completely based on Labview with a general-purpose data acquisition board (or a high quality sound card) and a high-gain low-noise amplifier. The signal analysis is processed by the software. We describe some characteristics of the LIA including output voltage vs. frequency and output phase vs. noise. The LIA can be used to measure the small signals, even in presence of broadband noise which is several times greater than the signal itself. Since the signal processing takes place on the computer, ...

    pdf6p tuanlocmuido 19-12-2012 26 4   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Analysis of Filter-Bank-Based Methods for Fast Serial Acquisition of BOC-Modulated Signals

    pdf11p sting10 07-03-2012 12 3   Download

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