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New designs of infinite impulse response (IIR) wideband digital integrators of second-, third- and forth-order are presented in this paper. These new integrators are designed by a recently proposed magnitude constrained minimax phase-error method. In these designs, the maximum phase response error is minimized under some constraints that the maximum relative magnitude response error is below a prescribed...
Magnitude-error and phase-error constrained optimal designs of finite impulse response (FIR) filters are nonconvex problems due to the nonconvexity of the lower-bound constraint of magnitude at any passband frequency point. In order to solve these problems, the nonconvex constraint region at an arbitrary passband frequency is usually approximated by a convex one. In this paper, a new convex constraint...
IIR frequency-response masking (FRM) filter where the prototype filter is an IIR filter and the masking filters are FIR filters is effective in reducing the group delay of FRM filters. In this paper, we present a constrained optimization method for the design of near linear phase IIR FRM filters, where the phase error and magnitude error are independently controlled. A design example is presented...
It needs to be studied how to integrate the new standards of medical waveform format resent version published by ISO22077-2015 (MWF) and current executed standards for a suitable and detail application of MWF. Methods: 1. Header Information of ISO22077 about demographics was further encoded with the standard from “serials standard of WS for health information” (WSx), such as WS 363/364-2012 issued...
The static Var generator (SVG) is one of the new high technology devices with a promising future of applications due to advancements in power electronics and microelectronics technologies. It is an ideal device to stabilize the voltage and enhance the power factor for power system. Comparing with traditional two-level SVG, three-level SVG with neutral point clamped (NPC) topology has advantages of...
The design of variable fractional delay (VFD) FIR filters in the weighted least squares (WLS) sense is investigated in this paper. Unlike most methods in the literature where separable weighting functions are used, we consider the more general case with an arbitrary nonnegative weighting function. To solve this problem more efficiently, the WLS design of VFD FIR filters is formulated using matrix...
In this paper, a multi-layer weighted extreme learning machine (ML-WELM) is proposed for high-dimensional datasets with class imbalance. The recently proposed single hidden layer WELM method effectively tackles class imbalance but it may not capture high level abstractions in image datasets. ML-WELM provides efficient representation learning for big image data using multiple hidden layers and at the...
Acoustic signal based recognition for excavation devices has been investigated in the past due to its significance in preventing the underground cables from being destroyed during the ground excavation. However, existing excavation devices classification algorithms have paid little attention to the reduction of background noises which usually severely degrade the recognition performance. This paper...
Minimum-phase finite impulse response (FIR) filters have found many applications in digital signal processing and communications. An iterative constrained minimal Lp elliptic error method was proposed in [15] to convert the nonconvex constrained Lp magnitude error design of FIR filters into a series of convex constrained Lp subproblems. In this paper, the improved Lawson algorithm by Rice and Usow...
In optimal designs of infinite impulse response (IIR) filters, a major challenge is how to choose proper stability constraints to insure the stability of the designed filters. A method was proposed in [12] to iteratively and sequentially convert the minimax design of an IIR filter to a sequence of minimax designs of sub-filters with second-order denominator, for which the necessary and sufficient...
Scene recognition applications on mobile devices receive increasing attentions in recent years. Due to mobile users' real-time requirement, an accurate and efficient scene recognition system is urgent for mobile applications. In this paper, we propose a novel discriminative codeword selection method by using the ensemble extreme learning machine (ELM) algorithm for fast and accurate scene recognition...
An efficient algorithm is presented in this paper for the constrained least-squares design of centrally symmetric two-dimensional (2-D) finite impulse response filters. The problem is basically a quadratic programming with positive-definite quadratic cost and linear constraint functions. This paper formulates both the cost and constraint functions in terms of two coefficient matrices of small size...
The minimum variance distortionless response beamformer (MVDR) using the direction-of-arrival (DOA) of the source signal as the steering vector for an acoustic vector sensor (AVS) s proposed. The interference reduction performance of the MVDR beamformer under a scenario of one directional interference and different sensor noises is analyzed. The output signal-to-noise ratio (oSNR) and array gain of...
The response time of conventional single-phase PLLs is usually more than two grid cycles, far from meeting the requirement of fast and accurate phase locking. This paper presents a fast grid synchronization scheme, Open-loop Phase Locking based on the Synchronous Reference Frame (SRF-OPL), which is able to deal with the phase locking of non-ideal single-phase grid. It is free from self-tuning closed-loop...
A partial rescheduling (PR) heuristic is presented for single machine with unforeseen breakdowns. Unlike a full rescheduling strategy where all unfinished jobs are considered, a PR strategy reschedules partial unfinished jobs which form a PR problem, and shifts the rest jobs to the right according to the solution of the PR problem. The rescheduling problem considers a bi-criterion that optimizes both...
Objective: Systems engineering theory, hand-hold fundus camera(FC) and internet cooperative platform were applied to help community staff, long distance specialists' organizations and teams to cooperate on the screening for diabetic fundus pathological change(or diabetic retinopathy, DR) in regional residents. It aims at promoting the ability to prevent and control (PC) the important non-infectious...
Landmark recognition attracts great concerns in recent years due to its extensive applications in mobile terminals. An effective recognition system with high recognition accuracy and fast response speed is highly desired by users. In this paper, we propose an ensemble based constrained-optimization extreme learning machine (CO-ELM) combining with the spatial pyramid kernel based bag-of-words (SPK-BoW)...
Conventional algorithms for phase-error constrained minimax (PCMM) designs of two-dimensional (2-D) FIR filters vectorize the filter's impulse response coefficient. Recently, an efficient algorithm exploiting the matrix nature of the impulse response is proposed for the constrained least-squares (CLS) design of 2-D nonlinear-phase FIR filters. This paper devotes to transform the PCMM design into the...
Automatically recognizing a place or landmark attracts increasing attentions in recent years due to its wide applications in mobile terminals. In this paper, we consider the problem of landmark recognition using sparse representation in compressed sensing. After constructing the dictionary with training samples, the recognition of a query landmark image is converted to solving a linear representation...
In this paper, a voting based weighted online sequential extreme learning machine (VWOS-ELM) is proposed for class imbalance learning (CIL). VWOS-ELM is the first sequential classifier that can tackle the class imbalance problem in multi-class data streams. Utilizing WOS-ELM and the recently proposed voting based online sequential extreme learning machine (VOS-ELM) method, VWOS-ELM adapts better to...
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