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This work presents that, only using non-invasively captured brain signals, a person can navigate an electric wheelchair with no serious training for a long term. Only two electrodes are set on the scalp non-invasively to detect a P300 EEG signal and a reference signal. A simple signal processing interprets the measured signals to decide a movement direction of the wheelchair. The whole devices are...
This article is focused on plethysmography measurement using wireless communication. The work consists of hardware solution for wireless measurement using WLAN and pocket PC and methodology for plethysmograph classification. The hardware construction is fully described and plethysmograph signal classification tool using expert system too.
The offered method of forming and working out of digital signals on basilar levels of the computer systems spread on the basis of quasithree entropy manipulated signals.
The concept of brain-computer interface (BCI) has emerged over the last three decades as a promising alternative to the existing interface methods. However the BCI framework generally spoken only emphasizes on the aspects of BCI signal processing, lacking of the function of visualization and virtual reality (VR) feedback. This paper designs a general and extendable framework which has the ability...
This article bases on the transfer function of simulating system, raises a practical way to linear transformation of matrix calculation. The elements in matrix can come out themselves according to the value. It is fast and convenient, it is easy to adjust, it makes a certain contribution in the project of automatic control and signal processing.
Residue number system (RNS) representations, which allow fast addition and multiplication, have found niche applications in signal processing. These representations are based on integer-valued residue ??digits?? with respect to integer moduli. We introduce RNS representations with continuous or analog digits, and study their dynamic range, accuracy, and optimal choice of the moduli. Like positional...
At present, many algorithms are presented, and APIT algorithm (Approximate Point-in-triangulation Test) is a kind of range-free localization, which has a relatively high precision and stable performance. However, the coverage rate of APIT algorithm is somewhat poor. With regards to this, this paper proposes an improved method which can convert those unknown nodes that can be located firstly to new...
This paper introduced the content and the status quo of study of the mechanical fault diagnosis, detailed the construction method and the overall structure of mechanical fault diagnosis system based on LabVIEW, and carried out applied research of rotating mechanical fault diagnosis by the use of virtual instrument technology and the use of mechanical fault diagnosis system based on the LabVIEW platform...
Summary form only given. We describe a set of prior distributions whose independent and identically distributed (iid) realizations result in compressible signals. A signal is compressible when the sorted magnitudes of its coefficients exhibit a power-law decay so that the signal can be well-approximated by a sparse signal. By definition, a sparse signal has only a small fraction of non-zero coefficients...
CNC systems have been widely adopted in the modern manufacturing and most of them were built on computers. As a result of the special hardware and software, it is difficult to maintain the CNC systems and update them. To solve the problem above, many new methods were adopted. One method based on DSP is studied in this paper. The features of new generation CNC based on DSP were presented and characteristics...
Microcalorimeters are cryogenic radiation detectors that measure the energy of incident photons or particles by the increase of temperature in an absorber. They are capable of achieving ultra-high energy resolution, but only with small active volumes and pulse decay times in the order of milliseconds. Consequently, detection efficiency per detector is very low. A practical detector thus requires a...
Arc fault detection system (AFDS) is a device intended to protect the power system against the arc fault that may cause fire. When there is an arc fault, the scale of fault current is lower than the initialization of most of the protection devices installed in the lowers, hence AFDS is an effective device to detect the arc fault successfully and interrupt the circuit in time. The characteristics of...
In this paper, the protection of a new low-voltage motor controller is introduced based on ARM technology, the LPC2136 is applied as motor control center. The composition of systems and signal processing are described in detail. The design makes full use of internal hardware resource, prevents motor damage effectively, and includes protection, measurement and all.
In this paper, we present a novel approach for accurate modeling of computer workloads. According to this approach, the sequences of features generated by a program during its execution are considered as time series and are processed with signal processing techniques both for feature extraction and statistical pattern matching. In the feature extraction phase we used spectral analysis for describing...
In source localization one estimates the location of a source using a variety of relative position information. Such relative position information is often provided by the received signal strength (RSS) which is in turn affected by log normal shadowing. A related issue is to place sensors around a localized source in a manner in which they can optimally monitor it. This paper considers optimal sensor...
Summary form only given. This talk will explore the use of motion information in video surveillance. We will focus primarily on retrieval and activity recognition of motion events in video and sensor databases characterized by multiple interactive motion trajectories. We will present a framework based on tensor decomposition for indexing and retrieval of multiple motion trajectories in video databases...
Through analyzing the situation of accelerometer testing system, there are several bottleneck factors such as various testing procedure, complicated operation, and easy to cause mishandling which have restricted the accelerometer's automatic testing capability. To calibrate the performance parameters better, the testing system for accelerometer based on GPIB is designed, and the composition of the...
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