188,717 research outputs found

    Asymptotic Stability of Fixed-Point State-Space Digital Filters with Saturation Arithmetic and External Disturbance: An IOSS Approach

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    A criterion for the input/output-to-state stability of interfered state-space digital filters with saturation arithmetic and external interference is presented. The proposed linear matrix inequality-based criterion ensures the reduction in the effect of external interference as well as confirms the asymptotic stability in the absence of external interference. The criterion turns out to be an improvement over a previously reported criterion. A numerical example is given to illustrate the applicability of the proposed criterion

    A Note on the Induced l∞ Stability of Fixed-Point Digital Filters Without Overflow Oscillations and Instability Due to Finite Wordlength Effects

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    A recently reported criterion due to Ahn and Lee (Adv Differ Equ 51:1–7, 2012) for the induced l∞ stability of fixed-point digital filters without overflow oscillations and instability due to finite wordlength effects is reviewed. This article points out that there is a technical error in the main result and at the same time presents an approach to correcting the main result. Moreover, a relaxed version of the criterion is made available. Illustrative examples are given to demonstrate the effectiveness of the proposed result

    An improved criterion for peak-to-peak realization of direct-form interfered digital filters employing saturation nonlinearities

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    Purpose - The purpose of this paper is to present a criterion for global asymptotic stability of state-space direct-form digital filters employing saturation arithmetic. Design/methodology/approach - An elegant use of induced l∞ approach (also known as a peak-to-peak approach) is made to develop a criterion for the overflow stability of state-space direct-form digital filters. Findings - The criterion not only guarantees asymptotic stability but also reduces the effect of external interference. The presented method yields better interference attenuation level as compared to a recently reported method. Numerical examples are given to illustrate the effectiveness of the proposed method. Practical implications - Digital filters are important dynamical systems in signal processing which are used for the processing of discrete signals. During the implementation of higher-order digital filter in hardware or software, introduction of external interference is unavoidable. Therefore, stability analysis of digital filters in the presence of external interference is of much practical importance. Originality/value - The main result of the paper is reported for the first time and it is useful to establish the asymptotic stability of digital filters in the presence of external disturbances

    Faunal Remains from Girawad (2006-2007), District Rohtak, Haryana

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    The Harappan site of Girawad was excavated for a single season in 2006‐07 by excavators from Deccan College, Pune; MD University, Rohtak and Research Institute for Humanity and Nature, Japan to salvage fast‐vanishing archaeological record. This single culture site, circular in plan and 8 ha in area, lies 3 km to the east of the present village of Girawad. Altogether 41 trenches revealed 13 pitdwelling complexes with ceramics similar to Hakra Ware which portrays a regional variation that can roughly be dated to middle of Fourth Millennium BC. The faunal material (n=4671) from this site was analyzed at the Archaeozoology Laboratory at Deccan College, Pune following internationally standardized procedures. This paper throws light on the diverse faunal spectra and the role and contribution of different mammalian and non‐ mammalian species to the human subsistence at Girawad. Methods used include NISP, skeletal representation and a minute study of pre and post depositional bone modifications generated by anthropogenic and other causal agents in the background of their contexts

    Morphological modulation of polypyrrole thin films through oxidizing agents and their concurrent effect on supercapacitor performance

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    Abstract not availableSujata S. Shinde, Girish S. Gund, Deepak P. Dubal, Supriya B. Jambure, Chandrakant D. Lokhand

    Electrochemical synthesis of photosensitive nano-nest like CdSe(0).(6)Te(0).(4) thin films

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    Abstract not availableSurendra K. Shinde, Jagannath V. Thombare, Deepak P. Dubal, Vijay J. Fular

    RAS739115 Appendix 2 - Supplemental material for Investigating the attainment of open government data objectives: is there a mismatch between objectives and results?

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    Supplemental material, RAS739115 Appendix 2 for Investigating the attainment of open government data objectives: is there a mismatch between objectives and results? by Anneke Zuiderwijk, Rhythima Shinde and Marijn Janssen in International Review of Administrative Sciences </p

    RAS739115 Appendix 1 - Supplemental material for Investigating the attainment of open government data objectives: is there a mismatch between objectives and results?

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    Supplemental material, RAS739115 Appendix 1 for Investigating the attainment of open government data objectives: is there a mismatch between objectives and results? by Anneke Zuiderwijk, Rhythima Shinde and Marijn Janssen in International Review of Administrative Sciences </p

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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