Entity

Time filter

Source Type


Ansari A.Q.,Jamia Millia Islamia University | Gupta N.,Krishna Institute Of Engg And Technology
ACE 2010 - 2010 International Conference on Advances in Computer Engineering | Year: 2010

Computational intelligence combines neural network, fuzzy systems and evolutionary computing. In this manuscript a neurofuzzy filter (NFF) is presented, which is based on fuzzy if-then rules (structure learning) and the tuning of the parameters of membership function (parameter learning). In the structure learning, fuzzy rules are found based on the matching of input-output clusters. In the parameter learning, the consequent parameters are tuned optimally by either least mean square (LMS) or recursive least squares (RLS) algorithms and the pre condition parameters are tuned by backpropagation algorithm. Both the structure and parameter learning are performed simultaneously as the adaptation proceeds. Simulation for echo cancellation in cellphone is performed. Good performance is achieved by applying the NFF to echo cancellation on a cellphone. © 2010 IEEE.


Goel V.,Ajay Kumar Garg Engineering College | Panwar G.,Ajay Kumar Garg Engineering College | Ahlawat A.K.,Krishna Institute Of Engg And Technology
Proceedings of the 2013 3rd IEEE International Advance Computing Conference, IACC 2013 | Year: 2013

In wireless communication, broadcasting is one of the most suitable solutions of information dissemination. It is very attractive for limited resource handheld mobile devices in asymmetric communications. Access time and Tuning time are two criteria to evaluate the performance of air indexing technique. Indexing can reduce tuning time of the mobile devices by switching mobile device into doze mode while waiting for desired of data to arrive and active mode while desired of data has presented. Some air indexing techniques can save limited battery power while incurring only limited overhead on access time. In this paper, we discuss and analyze energy efficient air indexing techniques for single and multi-level wireless channel. The basic indexing techniques i.e. B+ tree, the hashing and the signature schemes of data broadcasting are compared between Single and Multi-level channel. © 2013 IEEE.


Kumar V.,Krishna Institute Of Engg And Technology | Sharma S.K.,DAV College Kanpur | Dwivedi D.K.,Madan Mohan Malaviya University of Technology
Journal of Alloys and Compounds | Year: 2012

In this paper a screen-printing method has been employed for the deposition of low zinc content cadmium zinc sulphide (Cd 0.9Zn 0.1S) composite thin films on ultra clean glass substrate. Cadmium sulphide, zinc sulphide and cadmium chloride have been used as the basic source material. With these basic source materials, the optimum conditions for preparing good quality screen-printed films have been found. X-ray diffraction studies revealed that the films are polycrystalline in nature, single phase exhibiting wurtzite (hexagonal) structure with strong preferential orientation of grains along the (1 0 1) direction. SEM/EDAX analysis confirms the formation of ternary compound. The optical band gap (E g) of the films has been studied by using reflection spectra in wavelength range 350-600 nm. The DC conductivity of the films has been measured in vacuum by a two probe technique. © 2011 Elsevier B.V.


Kumar V.,Krishna Institute Of Engg And Technology | Dwivedi D.K.,Madan Mohan Malaviya University of Technology | Agrawal P.,Vishveshwarya Institute Of Engg And Technology
Science of Sintering | Year: 2013

Zinc oxide films have been deposited on ultra-clean glass substrates by screenprinting method followed by sintering process. Optimum conditions for preparing good quality screen-printed films have been found. The optical band gap of the films has been studied using reflection spectra in wavelength range 325-600 nm by using double beam spectrophotometer. X-ray diffraction studies revealed that the films are polycrystalline in nature, single phase exhibiting wurtzite (hexagonal) structure with strong preferential orientation of grains along the (101) direction. Surface morphology of films has been studied by scanning electron microscopy (SEM) technique. The electrical resistivity of the films was measured in vacuum by two probe technique.


Rahamatkar S.,Nagpur Institute of Technology | Agarwal A.,Krishna Institute Of Engg And Technology
Communications in Computer and Information Science | Year: 2011

Time synchronization for wireless sensor networks (WSNs) has been studied in recent years as a fundamental and significant research issue. Many applications based on these WSNs assume local clocks at each sensor node that need to be synchronized to a common notion of time. Time synchronization in a WSN is critical for accurate time stamping of events and fine-tuned coordination among the sensor nodes to reduce power consumption. This paper proposes a lightweight tree structured time synchronization approach for WSNs based on reference nodes. This offers a push mechanism for (i) accurate and (ii) low overhead for global time synchronization. Analysis and comparative study of proposed approach shows that it is lightweight as the number of required broadcasting messages is constant in one broadcasting domain. © Springer-Verlag Berlin Heidelberg 2011.

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