In this paper, signed-rank based nonparametric detectors are used for pseudonoise (PN) code acquisition in direct-sequence spread-spectrum (DS/SS) systems. We first derive the locally optimum rank (LOR) detector and then propose the locally suboptimum rank (LSR) and modified signed-rank (MSR) detectors using approximate score functions. We compare the single-dwell scheme without the verificatio...

The Negative Selection Algorithm (NSA) is a kind of anomaly detection method inspired by the biological self/nonself discrimination principles. In this paper, we propose two new schemes for the detectors re-editing and censoring in the NSA. The detectors that fail to pass the negative selection phase are re-edited and updated to become qualified using the Differential Evolution (DE) method. In ...

We study issues related to designing speech event detectors for automatic speech recognition. Event detection is a critical component of a recently proposed automatic speech attribute transcription (ASAT) paradigm for speech research. Similar to keyword spotting and non-keyword rejection, a good detector needs to effectively detect speech attributes of interest while rejecting extraneous events...

Spark chambers, scintillation and Cerenkov detectors are used extensively in high energy physics experiments. The potential usefulness of semiconductor detectors is being investigated. There is a need for detectors which will identify very high energy particles. The various types of spark chambers are briefly reviewed, including narrow gap, wide gap and filmless chambers. Applications of scinti...

In this paper we present a new system for doubletalk detection that uses multiple signal detectors/discriminators based on recurrent networks. The goal is to build a simple system that learns to combine information from different signal sources to make robust decisions even under changing noise conditions. In this paper we use three detectors two of these are frequency domain signal detectors, ...

Color edge detection is approached in this paper using vector order statistics. Based on the R-ordering method, a class of color edge detectors is defined. These detectors function as vector operators as opposed to component-wise operators. Specific edge detectors can be obtained as special cases of this class. Various such detectors are defined and analyzed. Experimental results show the noise...

In this paper, signed-rank based nonparametric detectors are used for pseudonoise (PN) code acquisition in frequency-selective Rician fading channels. We first derive the locally optimum rank detector and then propose the locally suboptimum rank (LSR) and th order modified signed-rank (MSR ) detectors using approximate score functions. We compare the hybrid parallel double-dwell scheme using th...

We present methods to improve the energy resolution of single channel, room-temperature Cadmium-Zinc-Telluride (CZT) detectors. A new preamplifier design enables the acquisition of the actual transient current from the crystals and straightforward data analysis methods yield unprecedented energy resolution for our test-detectors. These consist of an eVCAPture Plus crystal as standard and 1 cm c...

The paper considers a consensus algorithm for an asynchronous system augmented with failure detectors, and analyze the impact on its termination time of various implementations of failure detectors. This study shows that the design of fault-tolerant distributed algorithms in the asynchronous system model augmented with failure detectors is orthogonal to implementing the actual failure detectors...