Filters








12,645 Hits in 3.0 sec

A Linear Algebraic Approach to Metering Schemes

Carlo Blundo, Sebastià Martín, Barbara Masucci, CarlEs Padró
2004 Designs, Codes and Cryptography  
They also provided lower bounds on the communication complexity of metering schemes. In this paper we describe a linear algebraic approach to design metering schemes realizing any access structure.  ...  Namely, given any access structure, we present a method to construct a metering scheme realizing it from any linear secret sharing scheme with the same access structure.  ...  Acknowledgements This work was done while the third author was visiting the Departament de Matem atica Aplicada IV at the Universitat Polit ecnica de Catalunya, Barcelona, Spain She would like to thank  ... 
doi:10.1023/b:desi.0000036249.86262.d5 fatcat:vzq3wi2vpbc2xogccekcpqdbbq

Robust Metering Schemes for General Access Structures [chapter]

Ventzislav Nikov, Svetla Nikova, Bart Preneel
2004 Lecture Notes in Computer Science  
In this paper we extend the linear algebra approach from Nikov et al. in order to build robust unconditionally secure general metering schemes.  ...  They show that one should be able to detect illegal behavior of clients, i.e., one needs to verify the shares received from clients. Most metering schemes do not offer this feature.  ...  A linear algebra approach (which is applicable for any general monotone access structure) to metering schemes is presented in [3] by Blundo et al.  ... 
doi:10.1007/978-3-540-30191-2_5 fatcat:fbbofpdi3jggfjjp5hhlkdhr6u

Page 23 of The Trend in Engineering Vol. 13, Issue 3 [page]

1961 The Trend in Engineering  
Because both plant and controller are assumed to be linear, J can be expressed as an algebraic function of the eight parameters, M, a, k, l, K,, K, P, and Z.  ...  ADAPTIVE CONTROL SYSTEM Two possible approaches to the plant-adaptive prob- lem are: (a) a “plant-measuring” scheme in which dynamic measurements are made on the plant by the adaptive computer to determine  ... 

Numerical modelling of series-parallel cooling systems in power plant

Paweł Regucki, Marek Lewkowicz, Małgorzata Kucięba, B. Kaźmierczak, M. Kutyłowska, K. Piekarska, H. Jouhara, J. Danielewicz
2017 E3S Web of Conferences  
The analytical approach is based on a set of non-linear algebraic equations solved using numerical techniques.  ...  Such an approach makes it possible to analyse different variants of the modernization of the studied systems, as well as allowing for the indication of its critical elements.  ...  The analytical approach establishes a set of non-linear algebraic equations which can be solved with numerical techniques.  ... 
doi:10.1051/e3sconf/20172200144 fatcat:ujeibkschfbyrfrbu47bqrea6a

Considerations Regarding the Modelling of Wind Energy Conversion Systems [article]

Iosif Szeidert, Octavian Prostean, Ioan Filip, Nicolae Budisan
2018 arXiv   pre-print
There are presented models of some WECS components and related, such as: a probabilistic 2D model for instantaneous wind velocities, aerodynamic model of wind turbine, rotating inertia model, asynchronous  ...  This approach leads to models for the electrical components of the power system with the following main characteristics: -the grid including the stator of the rotating machine will be represented by algebraic  ...  This means for a comprehensive analysis approach that all relevant components have to be considered with a similar level of detail and system models can not be restricted to electrical components primarily  ... 
arXiv:1804.06649v1 fatcat:m4xnlznesrh7xi3hmyawlvkjny

Self-Calibration of Ultrasonic Water Flow Meter

2019 International journal of recent technology and engineering  
According to the results, piecewise linear least squares approach supplies the best performance at overall volumetric flow rates accompanying with wireless fine calibration system based on RF communication  ...  In this paper, the calibration procedure of a specific ultrasonic water flow meter is discussed, and then a wireless system is proposed to carry out fine calibration.  ...  Piecewise linear least squares approach Fine Calibration Fine calibration is considered as a necessary stage to avoid measuring errors due to the installation and environmental effects, possible fluctuations  ... 
doi:10.35940/ijrte.d7835.118419 fatcat:zfkmwfk3lzgbbikmuxmkqvon2e

Secure Power Systems Against Malicious Cyber-Physical Data Attacks: Protection And Identification

Morteza Talebi, Jianan Wang, Zhihua Qu
2012 Zenodo  
The identification scheme of finding meters being attacked is proposed as well. Eventually, a well-known IEEE 30-bus system is adopted to demonstrate the effectiveness of the proposed schemes.  ...  To this end, we define an algebraic condition for trustworthy power system to evade malicious data injection.  ...  The attack vectors can be chosen to be a linear combination of the vectors in the null space of (P − I).  ... 
doi:10.5281/zenodo.1063231 fatcat:uczjthmgwbbirgpv4xw7ux3uui

Improving performance and energy efficiency of matrix multiplication via pipeline broadcast

Li Tan, Longxiang Chen, Zizhong Chen, Ziliang Zong, Dong Li, Rong Ge
2013 2013 IEEE International Conference on Cluster Computing (CLUSTER)  
As a fundamental component of most numerical linear algebra algorithms, improving performance and energy efficiency of distributed matrix multiplication is of major concerns.  ...  and energy savings up to 6.1% are observed on a 64-core cluster.  ...  The authors would like to thank the HPCL Lab at the Marquette University for providing the distributed-memory computing cluster with PowerPack.  ... 
doi:10.1109/cluster.2013.6702672 dblp:conf/cluster/TanCCZLG13 fatcat:znhra5h23rhfbdscvwodoc5hcu

Page 1654 of Mathematical Reviews Vol. , Issue 87c [page]

1987 Mathematical Reviews  
Computation is reduced to a solution of one algebraic Riccati equation, the dimension of which cepends on the structure of the system.  ...  The method for constructing a Gaussian- Markov analogue of the process (X,Y) is also suggested for the discrete-time case. This approach is used to construct a Kalman filter.  ... 

Comparison of estimates calculated on the energy flow problem basis and using testing equations method

Elena Kochneva, Aleksandar Sukalo, H. Bevrani, W. Shuhui
2018 MATEC Web of Conferences  
The second technique is simplified and uses a system of testing equations to calculate the measurements estimates.  ...  The article is devoted to the electrical energy measurements estimates calculation. Automatic Meter Reading systems are the source of measurements. Two methods are compared.  ...  Test scheme The weight coefficients l a from (1) are necessary to take into account the information on the relative errors of automatic meter reading complexes [12] [13] .  ... 
doi:10.1051/matecconf/201820803002 fatcat:3glriiptlzcn7dvyvch5b6fy5u

Private Computation of Spatial and Temporal Power Consumption with Smart Meters [chapter]

Zekeriya Erkin, Gene Tsudik
2012 Lecture Notes in Computer Science  
We also consider temporal aggregation of multiple measurements for a single smart meter.  ...  Reconciling smart metering's benefits with privacy concerns is a major challenge.  ...  One approach to smart loadbalancing currently pursued by many developed countries is the deployment of so-called "smart meters" that measure and report power consumption on a regular basis, thus allowing  ... 
doi:10.1007/978-3-642-31284-7_33 fatcat:kos6jgd7vzg2vgykghnzrgqmly

Trace resetting density matrix purification in O(N) self-consistent-field theory

Anders M. N. Niklasson, C. J. Tymczak, Matt Challacombe
2003 Journal of Chemical Physics  
A new approach to linear scaling construction of the density matrix is proposed, based on trace resetting purification of an effective Hamiltonian.  ...  Palser-Manolopoulos scheme.  ...  Relative to the cutoff approach, a major advantage of threshold metered sparse linear algebra is that it avoids discontinuities in the potential energy surface associated with atoms moving in and out of  ... 
doi:10.1063/1.1559913 fatcat:ssu2o3ccd5bqdbxi2njh3hqfbi

A survey of power and energy efficient techniques for high performance numerical linear algebra operations

Li Tan, Shashank Kothapalli, Longxiang Chen, Omar Hussaini, Ryan Bissiri, Zizhong Chen
2014 Parallel Computing  
We first stress the significance of numerical linear algebra algorithms in high performance scientific computing nowadays, followed by a background introduction on widely used numerical linear algebra  ...  Extreme scale supercomputers available before the end of this decade are expected to have 100 million to 1 billion computing cores.  ...  Based on the CP approach, several algorithms such as Slack Reduction algorithm and Race-to-Idle algorithm [81] [82] [83] have been proposed to save energy for dense linear algebra algorithms on shared-memory  ... 
doi:10.1016/j.parco.2014.09.001 fatcat:twdkr2hrizebvglto6dwd7jqem

Network coding in Smart Grids

Y. Phulpin, J. Barros, D. Lucani
2011 2011 IEEE International Conference on Smart Grid Communications (SmartGridComm)  
Seeking to meet the resilience, efficiency and security challenges of smart grid communications, we present a set of strategies that leverage the benefits of network coding.  ...  The key idea is for intermediate nodes in the electrical power grid to store and send linear combinations of data packets they receive or overhear, thus ensuring that critical data can be shared reliably  ...  ACKNOWLEDGEMENTS The authors are very grateful to Susana B. Cruz for generating the graphs in Fig. 3 . They also thank João Peças Lopes for his intsightful advice.  ... 
doi:10.1109/smartgridcomm.2011.6102374 dblp:conf/smartgridcomm/PhulpinBL11 fatcat:hwk2yn5eu5huxaglkibi4y3qce

Algebraic Methods for Traffic Flow Densities Estimation

H. Abouaïssa, V. Iordanova
2013 Cybernetics and Information Technologies  
An estimation approach that allows recovering of the traffic state is proposed in this paper.  ...  The method used is based on numerical differentiation, which does not need any integration of differential equations and turns out to be quite robust with respect to perturbations and measurements noises  ...  Other research works will be realized in order to exploit the approach proposed for dynamic traffic management and control measurements design, such as ramp metering, dynamic speed limits and dynamic traffic  ... 
doi:10.2478/cait-2013-0049 fatcat:j7tqyl5zobedba4x2sicasnjpu
« Previous Showing results 1 — 15 out of 12,645 results