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This paper presents a methodology for optimizing the size of energy storage system (ESS) for maximizing the capture of energy regenerated by a train. Besides, minimization of energy consumption from the substation, in order to obtain a return on investment, has also been explored. A standard structure of rail transit system has been used here for analysis. The optimization process takes into account...
Sparse code multiple access (SCMA) is a nonorthogonal multiple access scheme based on a multi-dimensional codebook with sparse codewords. The sparsity property of SCMA allows the receiver to take advantage of low-complexity message passing algorithm (MPA) detector with maximum likelihood (ML)-like performance. The use of multiple antennas at the SCMA receiver will improve the detection performance...
As a key component of DC medium voltage breaker, the switch mechanism is required to open in high-speed and can withstand the breaking voltage which is generated during opening motion. Thus, the design of driving circuit of switch mechanism is very important to optimize the mechanism structure and improve mechanism opening characteristics. First the motion principle of high-speed switch was given...
In this paper, the principle of density evolution (DE) combined with the normalized minimum-sum (NMS) decoding process is explored. It is demonstrated that with one properly chosen parameters for NMS algorithm, then almost the same behaviour of sum-product (SP) algorithm is achieved. As well, the complexity reduction is realized by calculating a linear function instead of nonlinear function. Simulation...
Progressive edge-growth (PEG) algorithm was proven to be a simple and effective approach to design good LDPC codes. However, the low-density parity-check (LDPC) constructed by PEG algorithm is of a single code rate. In this paper, we propose a modified PEG algorithm to construct multiple-rate LDPC codes, which is referred to as the multiple-rate PEG (MR-PEG) algorithm. The obtained LDPC codes with...
Due to the insignificant share of inverter-based Renewable Energy Resources (RER) as well as the uncertainty concerning their integration impacts, the capability of RERs to regulate voltage or frequency has not been widely used. However, inverter-based voltage/frequency regulation is of interest due to the fast growth of distributed RERs, especially solar Photovoltaic (PV) resources. The IEEE 1547a...
This paper presents novel constrained consensus least mean square (cLMS) algorithms with adjustable constraints that can improve the learning performance of distributed estimation problems in sensor networks by exploiting the spatial diversity of the estimates. For the first algorithm, the constraint vectors are adjusted by combining the components of the estimate orthogonal to its neighbor estimates...
This research considering one working partition of order picking system as the research object, studies order batching problem and builds order batching model of fixed maximum order number. To solve the order batching model, the storage location similarity coefficient is token as clustering index, at the same time clustering algorithm is designed. This paper explores the application analysis of the...
The satellite-based L-band radiometer of China under designing is aim to measure sea surface salinity, which will be launched in 2018. In this paper, a research of Celestial Sky Calibration (CSC) for Chinese L-band radiometer is presented. The orbit of satellite is calculated with planned parameters for a repeat period at first, and then the optimum location for performing a CSC is determined by calculating...
Benefit from the caching hits on the routers along the request routing path, in-network caching plays an important role in diminishing the distance between the consumers and their desired contents. A content caching model is proposed to intuitively analyze the small world characteristics of in-network caching in information centric networks. A directed long edge from a caching node to the provider...
Spatially-coupled (SC) codes are a family of graph-based codes that have attracted significant attention thanks to their capacity approaching performance. An SC code is constructed by partitioning an underlying block code into a number of components, and coupling their copies together. The number of components is determined by the memory parameter. In this paper, we study a finite length construction...
The possibilities of substitution of the distributed radar object by the geometrical model, composed of two point radiators for normal distribution correlation, have been analyzed. A distribution law of the coordinate noises was used for an adequacy criterion of the model. Relations, that define the limits of the obtainable values for an expected value and a parameter determining a distribution width...
In this paper we propose the algorithms that can be used to determine the values for several parameters that characterize the dynamic regime of operation of a DC motor. These parameters values are determined by simulation based on a state-space model by means of a virtual instrument made in LabView. In this way is possible to observe the dynamic characteristics of the DC motor in different operating...
The article deals with the problem of the electricity consumption simulation of the metallurgical production processes in short-term forecast period. A method of inter-level contradictions resolution in automated system based on an aggregate indicator has been developed. The offered indicator (the energy consumption cost reduction index) allows coordinating detailed representations of resources consumption...
The paper offers the simple voltage source multilevel inverter space vector PWM algorithm (based on the oblique-angled coordinates of two delta voltages) with the optimum three-segment non-symmetric vectors switching sequence variant providing the instantaneous output voltage quarter-wave symmetry. The comparisons with the five-segment variant by the voltage waveforms, spectra and THD are performed...
The comparisons of the new offered optimum three-segment and the previously considered five-segment variants of the space vectors switching sequence are continued in values of the first three orders of the n-order integral voltage harmonics factors and in values of the first three orders of some unified indices, the so-called n-order aggregate switchings and integrated voltage harmonics factors. The...
In this study, we created a unique two-cell (in parallel) selective catalytic reduction (SCR) platform for investigating the impact of ammonia storage non-uniformity on the emission reduction performance in simulation environment. The established two-cell SCR platform allows users to independently control the ammonia-to-NOx ratio (ANR) for each cell using two independent urea solution injectors. Simulation...
For an urban road indicating device, Variable Message Signs (VMS) screen system is used to publish and display all kinds of traffic information, including the condition of current and nearby roads and the useful travel advice, which leads to the topic that the VMS screen visual effect is a crucial issue. Therefore, a model for the visual effect evaluation of VMS screen with the simulation method is...
Recentry, interference of artificial noises from electrical power transfer becomes large and deterioration of sound quality of AM radio is worried. The authors proposed a noise suppression system for AM radio using quadrature demodulation and PI algorithm. It is expected that the noise suppression effect is reduced when the system has a synchronization error. In this paper, an effect of synchronization...
Multilevel inverters allow to generate AC voltages with low total harmonic distortion (THD) but requires an increased number of power switches. One of the disadvantages of that is the increased probability of a fault in one of the power switches. Thus in order to improve the reliability of the converter a fast and robust fault detection scheme must be used. In this context this paper presents a new...
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