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Conventional ATPG tools help in detecting only the equivalence class to which a fault belongs and not the fault itself. This paper presents PinPoint, a technique that further divides the equivalence class into smaller sets based on the capture power consumed by the circuit under test in the presence of different faults in it, thus aiding in narrowing down on the fault. Applying the technique on ITC...
Power Supply Noise (PSN) has emerged as an important resilience issue in nano-scale CMOS technology. Due to simultaneous switching of various gates, the actual supply voltage seen by individual gates inside the circuit might be lower than the nominal supply voltage, leading to extra delays. Since in at-speed scan testing simultaneous switchings are higher than the functional mode, test invalidation...
This paper deals with interactive distributed detection with conditionally independent observations where the fusion center may exchange information with a local sensor. Using a two sensor system, we demonstrate that this two-way interaction provides improvement in detection performance compared with the classical tandem detection system where only one-way communication is allowed. An important observation...
Customer care calls serve as a direct channel for a service provider to learn feedbacks from their customers. They reveal details about the nature and impact of major events and problems observed by customers. By analyzing the customer care calls, a service provider can detect important events to speed up problem resolution. However, automating event detection based on customer care calls poses several...
Data, especially in large item sets, hide a wealth of information on the processes that have created and modified them. Often, a data-field or a set of data-fields are not modified only through well-defined processes, but also through latent processes; without the knowledge of the second type of processes, testing cannot be considered exhaustive. As a matter of fact, changes in the data deriving from...
This paper deals with image denoising based on the wavelet transform realized by Mallat algorithm and À trous algorithm. The effectiveness of global and subband thresholding techniques are studied on multimedia and astronomical images contaminated by Gaussian noise. Experimental results on several testing images are compared with each other from two objective quality aspects (PSNR, RMSE). Astronomical...
Eco-environmental sounds depict the sound content of varieties of creatures' survival and activities in the ecological environment at a time interval. Research on eco-environmental sounds is useful in monitoring of the wildlife and their evolution with time. Due to varieties of noises in the ecological environment, we consider the task of eco-environmental sounds classification under noise conditions...
The aim of this study was to propose a music recommendation method to be effectively difficult to hear the sound of speech, and to confirm usefulness of the method. For confirm the usefulness of the recommendation method, two experiments were conducted. First, a hypothesis testing experiment was conducted for confirm whether musical pieces chosen on recommendation system is hard to hear sound of speech...
The main method of testing earthing system performance involves the use of an off-frequency injection current produced by a voltage source. While this provides a sufficient testing tool for a number of systems, deficiencies such as noise susceptibility, restricted power capabilities and unstable current present significant challenges to earthing system testers. This paper outlines a novel application...
Artery testing prevents us from atherosclerotic disease and several methods to evaluate physiological change are performed. However, comprehensive estimation methods of physiological characteristics of blood vessel are not well established and measured data are influenced by physiological conditions. Vascular system model can improve artery testing because parameters of the model indicate the characteristics...
This paper assesses an online method for testing the plausibility of a transferred Gaussian process (GP) communication model in a new environment based on a minimal number of signal measurements. The transferred GP is constructed by combining hyperparameters learned in the original environment with signal measurements collected by an unmanned aircraft (UA) in the new goal environment. The GP's performance...
This paper proposes a method for testing a device with multi-level signal interfaces. This method utilizes multi-level drivers that generate multi-level signals and multi-level comparators that are based on a new concept. The multi-level drivers can test the voltage noise tolerance of a receiver device with multi-level signal interfaces. The multi-level comparators realize real-time functional testing...
For high performance analog and mixed-signal products, production test is a significant contributor to the recurring manufacturing cost. For high resolution ADCs, the cost of build can be dominated by test cost, of which linearity test cost is often the largest component. This paper introduces a new algorithm that dramatically reduces ADC linearity test cost. The algorithm takes a system identification...
In recent years, liquid crystal displays (LCD) have almost completely replaced older technologies such as cathode ray tube (CRT) displays in many industrial, commercial, aerospace, and military applications due to their increased efficiency, decreased weight, and smaller size. Likewise, the technology used to transmit video signals to LCD displays has evolved from analog standards such as the National...
We consider the problem of comparing two complex multivariate random signal realizations to ascertain whether they have identical power spectral densities. A binary hypothesis testing approach is formulated and a generalized likelihood ratio test (GLRT) is derived. An asymptotic analytical solution for calculating the test threshold is provided. The results are illustrated via computer simulations...
In the lab, partial discharge diagnosis has widely replaced the traditional RIV measurements. Additionally, partial discharge acceptance levels are being reduced due to the increasing use of composite material and a growing awareness of partial discharge phenomenon and their consequences. Adequate filtering of the supply voltage for induced voltage testing and the use of sensitive acoustic measurement...
Full Paper — This document highlights the specification and performances of a modular generic test bench designed to test the pipe performances of Digital Beamformers Network (DBFN)
Granger causality considers the question of whether two time series exert causal influences on each other. Causality testing usually relies on prediction, i.e., if the prediction error of the first time series is reduced by taking measurements from the second one into account, then the latter is said to have a causal influence on the former. In this paper, a nonparametric framework based on functional...
We propose a method for learning dictionaries towards sparse approximation of signals defined on vertices of arbitrary graphs. Dictionaries are expected to describe effectively the main spatial and spectral components of the signals of interest, so that their structure is dependent on the graph information and its spectral representation. We first show how operators can be defined for capturing different...
Hyperspectral unmixing is a process of decomposing the hyperspectral data cube into endmember signatures and their corresponding abundance maps. For the unmixing results to be completely interpretable, the number of materials (or endmembers) present in that area should be known a priori, which however is unknown in practice. In this work, we use hyperspectral data geometry and successive endmember...
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