The growing complexity of computational modelling and its applications demands the simplicity of mathematical equations and techniques for solving today's scientific problems and challenges. This paper presents a ...
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The growing complexity of computational modelling and its applications demands the simplicity of mathematical equations and techniques for solving today's scientific problems and challenges. This paper presents a model of iterative computation that deals with design and optimization of recursive formulae related to series and summability with real-time function.
The filtered-x recursive square(FxRLS) algorithm has been proven to be efficient for active noise control(ANC) systems. Unfortunately, its performance deteriorates when the ANC systems are corrupted by impulsive noise...
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The filtered-x recursive square(FxRLS) algorithm has been proven to be efficient for active noise control(ANC) systems. Unfortunately, its performance deteriorates when the ANC systems are corrupted by impulsive noises. To reduce this drawback, a novel filter-x recursive least M-estimate adaptive(Fx RLM) algorithm for ANC is proposed in this paper, which can overcome the adverse effect of impulsive noise on the adaptation of controller. Simulations in the context of ANC system show that the proposed Fx RLM algorithm outperforms the conventional Fx RLS, filtered-x least mean p-power(Fx LMP) and robust Fx LMS(RFx LMS) algorithms.
The paper introduced recursive algorithm of fractal graphics,put forward fractal graphics parallel algorithm. Analyzing recursive algorithmic time complexity and speedup rate of the parallel *** experimental results o...
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The paper introduced recursive algorithm of fractal graphics,put forward fractal graphics parallel algorithm. Analyzing recursive algorithmic time complexity and speedup rate of the parallel *** experimental results of PC cluster show that the theoretical analysis and the experimental results of fractal graphics parallel algorithm are consistency with a marked speedup rate.
In this paper, the joint fault and state estimation problem is investigated for a class of nonlinear systems with eventtriggered transmissions and missing measurements. In the proposed event-triggered transmission sch...
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In this paper, the joint fault and state estimation problem is investigated for a class of nonlinear systems with eventtriggered transmissions and missing measurements. In the proposed event-triggered transmission scheme, in order to reduce unnecessary network traffic, the current measurement is released only when it changes greatly from the previously transmitted one. A Bernoulli distributed sequence taking values on 0 or 1 is introduced to govern possible missing measurements in the transmission. Special effort is made to obtain and then minimize certain upper bound of the estimation error covariance in the simultaneous presence of the linearization errors and imperfect measurement transmissions. It is noticeable that, in the proposed method, the traditional assumption on the availability on the probability density functions of the states and the innovations conditional on the measurements is no longer needed, and therefore the application scope is much widened. Moreover, the fault and states can be jointly estimated, thereby providing a way of simultaneously monitoring the system and diagnosing the *** estimator gain is calculated via solving two recursive matrix equations, and the corresponding algorithm is therefore suitable for online applications. An illustrative example is provided to show the effectiveness of the proposed algorithm.
Synchronized Measurement Technology represented by Phasor Measurement Units (PMUs) is a sophisticated tool for power system monitoring and contributes to a more reliable and secure operation of the power systems. Phas...
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Synchronized Measurement Technology represented by Phasor Measurement Units (PMUs) is a sophisticated tool for power system monitoring and contributes to a more reliable and secure operation of the power systems. Phasor estimation is the key of PMUs, providing amplitude and phase of voltage/current of the power network buses. In this paper, the performance of a recursive Prony algorithm for the phasor estimation is examined in steady state and under dynamic conditions. It is shown that the properties of the recursive algorithm have opposite impacts on the accuracy and the speed of the estimation, under these two conditions. To reach a good compromise between these two opposing properties, a modified recursive Prony, based on a time varying A, is proposed in this paper.
A number of binary modulation schemes are proposed for LED based Visible Light Communication (VLC) systems to jointly achieve data transmission and brightness control. These binary modulation based solutions are spect...
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ISBN:
(纸本)9781479935130
A number of binary modulation schemes are proposed for LED based Visible Light Communication (VLC) systems to jointly achieve data transmission and brightness control. These binary modulation based solutions are spectrally inefficient because they consider the LED light source as single device. We observe that most of the commercial LED lights use more than one LED per light source and the possibility of individual current control of these LEDs would provide better brightness control resolution as well as higher data transmission rates. To achieve this we propose multi-level multi-pulse position modulation block coding scheme to jointly control multiple LEDs providing flicker free VLC link. The brightness level of the light source is controlled based on the number of LEDs switched on simultaneously. New algorithms are developed for symbol encoding/decoding as well as to enumerate the maximum number of symbols that can be encoded for the selected brightness level and the number of levels. Improvement in spectral efficiency is analyzed and compared with the contending binary modulation schemes.
The increased use of automated storage and retrieval systems(AS/RS) is creating the need for computerized control algorithms to support the scheduling and picking *** research addresses an order picking problem in a m...
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The increased use of automated storage and retrieval systems(AS/RS) is creating the need for computerized control algorithms to support the scheduling and picking *** research addresses an order picking problem in a multi-aisle automated warehouse,in which a stack crane performs storage and retrieval operations,and each item can be found in several storage *** objective is to propose algorithms that minimize the total time traveled by the stack crane to complete the retrieval process of *** traveling salesman problem(TSP) can calculate the shortest distance between cities,order picking problem of the automated warehouse and the TSP are *** this paper,we use recursive algorithm to solve order picking *** experiment proved that the order picking optimization of the stacker systems will be of great significance for the RS to improve its ***,the recursive algorithm has been applied to practice.
The key point of robot dynamics is optimal design and *** efficiency of robot dynamics has been the goal of researchers in recent *** are used to describe dynamic problems in this paper,and an O(N) recursive robot for...
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ISBN:
(纸本)9781627483766
The key point of robot dynamics is optimal design and *** efficiency of robot dynamics has been the goal of researchers in recent *** are used to describe dynamic problems in this paper,and an O(N) recursive robot forward dynamic algorithm is given on *** can be easily extended to tree topology,closed loop and spatial robot *** three classic methods of robot dynamics are compared for easy of *** results show that dynamics described with screws are helpful in high efficient dynamics *** dynamical expressions based on screws are concise and ***'s efficiency is high of O(N) and is linear to the degree of *** the improvement of computation efficiency,it will make the real-time dynamics control become possible.
In this paper,a new recursive subspace model identification(RSMI) algorithm is proposed based on the Vector Auto Regressive with e Xogenous input(VARX) model and natural power *** developed method can recursively iden...
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In this paper,a new recursive subspace model identification(RSMI) algorithm is proposed based on the Vector Auto Regressive with e Xogenous input(VARX) model and natural power *** developed method can recursively identify the state space model under closed loop *** it can also be applied to open loop *** merit of adopting VARX model is that the closed loop identification problem can be handled as open loop identification *** RSMI problem can be easily transferred to array signal processing problem via VARX ***,Natural power method is a fast subspace tracking method in array signal process *** the singular value decomposition in subspace identification can be avoided by introducing natural power *** simulations are proposed to show the efficiency of the proposed RSMI algorithm under closed and open loop data.
An MX-CIF quadtree is a variant of quadtree which is for efficient spatial query such as whether objects are included by a spatial area [6].When query objects are indexed,a primary result with candidates which may int...
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An MX-CIF quadtree is a variant of quadtree which is for efficient spatial query such as whether objects are included by a spatial area [6].When query objects are indexed,a primary result with candidates which may intersect the query rectangle will be reported to have a successional precise *** saved time from inspecting each of the objects *** fewer the candidates are reported to the exact query;the less the time is used to accomplish a *** this paper,we propose an improved MX-CIF quadtree,compared with the original MX-CIF quadtree.A filter with our structure will decrease the failure rate of result,that is,a query will get fewer uncertain objects,the mechanism of which accelerates the secondary *** to original MX-CIF quadtree,with polygon data given by JTS Topology Suite （JTS） [2],42.1%-67.5% incorrect results were filtered out by our improved MX-CIF quadtree,and its cost of tree-building time is only slightly higher than the original MX-CIF quadtree.
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