检索结果-内蒙古大学图书馆

IEEE 13th Brazilian Power Electronics Conference/1st Southern Power Electronics Conference (COBEP/SPEC)

作者： De Paris, Jean-Michel Nicolini, Andre Miguel Carnielutti, Fernanda Massing, Jorge Pinheiro, Humberto Univ Fed Santa Maria Santa Maria RS Brazil

ISBN: (纸本)9781479987795

This paper proposes a simple phase disposition modulation with sorting algorithm for three-phase cascaded multilevel converters. The sorting algorithm can be implemented entirely in software. The main features of the proposed modulation is a better distribution of PWM pulses, switching losses and DC bus current when compared with the conventional phase disposition (PD) modulation. In addition, it results in the nearest level PWM in the line-to-line output voltages leading to a smaller THD if compared with phase-shifted (PS) modulation. Simulation results are presented to demonstrate the good performance of the proposed algorithm.

关键词： sorting algorithm PD Modulation Multilevel Converter

来源：评论

学校读者我要写书评

暂无评论

An Efficient sorting algorithm for Non-Volatile Memory

引用

INTERNATIONAL JOURNAL OF SOFTWARE ENGINEERING AND KNOWLEDGE ENGINEERING 2021年第11N12期31卷 1603-1621页

作者： Chu, Zhaole Luo, Yongping Jin, Peiquan Univ Sci & Technol China Sch Comp Sci & Technol Jinzhai Rd 96 Hefei 230027 Peoples R China

Non-volatile memory (NVM) has emerged as an alternative of the next-generation memory due to its non-volatility, byte addressability, high storage-density, and low-energy consumption. However, NVM also has some limitations, e.g. asymmetric read and write latency. Therefore, at present, it is not realistic to completely replace DRAM with NVM in computer systems. A more feasible scheme is to adopt the hybrid memory architecture composed of NVM and DRAM. Following the assumption of hybrid memory architecture, in this paper, we propose an NVM-friendly sorting algorithm called NVMsorting. Particularly, we introduce a new concept called Natural Run to improve the existing MONTRES algorithm. Further, we apply the proposed NVMsorting to database join algorithms to improve the performance of the existing sort-merge join. To verify the performance of our proposal, we implement six existing sorting algorithms as baselines, including the MONTRES algorithm, and conduct comparative experiments on real Intel Optane DC persistent memory. The results show that NVMsorting outperforms other sorting algorithms in terms of execution time and NVM writes. In addition, the results of the join experiment show that the NVMsorting algorithm achieves the highest performance among all schemes. Especially, in the partially ordered data, the execution time of NVMsorting is 2.9%, 2.7%, and 4.2% less than MONTRES, external sort, and quick sort, respectively. Also, the amount of NVM writes of the NVMsorting is 26.1%, 43.6%, 96.2% less than MONTRES, external sort, and quick sort, respectively.

关键词： Non-volatile memory hybrid memory sorting algorithm

来源：评论

学校读者我要写书评

暂无评论

A new sorting algorithm-based merging weighted fraction Monte Carlo method for solving the population balance equation for particle coagulation dynamics

引用

INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW 2023年第2期33卷 881-911页

作者： Wang, Fei Chan, Tat Leung Hong Kong Polytech Univ Dept Mech Engn Hong Kong Peoples R China

Purpose - The purpose of this study is to present a newly proposed and developed sorting algorithm-based merging weighted fraction Monte Carlo (SAMWFMC) method for solving the population balance equation for the weighted fraction coagulation process in aerosol dynamics with high computational accuracy and efficiency. Design/methodology/approach - In the new SAMWFMC method, the jump Markov process is constructed as the weighted fraction Monte Carlo (WFMC) method (Jiang and Chan, 2021) with a fraction function. Both adjustable and constant fraction functions are used to validate the computational accuracy and efficiency. A new merging scheme is also proposed to ensure a constant-number and constant-volume scheme. Findings - The new SAMWFIMC method is fully validated by comparing with existing analytical solutions for six benchmark test cases. The numerical results obtained from the SAMWFMC method with both adjustable and constant fraction functions show excellent agreement with the analytical solutions and low stochastic errors. Compared with the WFMC method (liang and Chan, 2021), the SAMWFMC method can significantly reduce the stochastic error in the total particle number concentration without increasing the stochastic errors in high-order moments of the particle size distribution at only slightly higher computational cost. Originality/value - The WFMC method (Jiang and Chan, 2021) has a stringent restriction on the fraction functions, making few fraction functions applicable to the WFMC method except for several specifically selected adjustable fraction functions, while the stochastic error in the total particle number concentration is considerably large. The newly developed SAMWFMC method shows significant improvement and advantage in dealing with weighted fraction coagulation process in aerosol dynamics and provides an excellent potential to deal with various fraction functions with higher computational accuracy and efficiency.

关键词： Monte Carlo Coagulation sorting algorithm Merging scheme Fraction functions

来源：评论

学校读者我要写书评

暂无评论

Event-driven sorting algorithm-based Monte Carlo method with neighbour merging method for solving aerosol dynamics

引用

APPLIED MATHEMATICAL MODELLING 2023年第1期120卷 833-862页

作者： Wang, Fei An, Liang Chan, Tat Leung Hong Kong Polytech Univ Dept Mech Engn Kowloon Hong Kong Peoples R China

A new event-driven sorting algorithm-based merging Monte Carlo (SAMMC) method is proposed and developed for solving the general dynamic equation in aerosol dynamics. A neighbour merging method is proposed to maintain a constant-volume and constant -number scheme with minimal interference to the numerical particle population, where ab-solute volume difference (AVD) and relative volume difference (RVD) are used as the cru-cial merging criteria. The SAMMC method can be used for simulating all aerosol dynamic processes with very high computational accuracy, especially effective in those aerosol dy-namic processes generating additional numerical particles. In the present study, compre-hensive computational conditions are used to study their impacts on computational accu-racy and efficiency by comparing the SAMMC method to previous MC methods and ana-lytical solutions. Numerical results show that the SAMMC method has excellent agreement with analytical solutions for all specified cases of different aerosol dynamic processes and shows higher computational accuracy than equal-weight-based MC methods. In addition, the computational accuracy of the SAMMC method in the total particle number concen-tration is much higher than those of the weighted fraction Monte Carlo (WFMC) method and sorting algorithm-based merging weighted fraction Monte Carlo (SAMWFMC) method in non-homogeneous coagulation. The SAMMC method can also achieve the same compu-tational precision as the multi-Monte Carlo (MMC) method at only slightly higher com-putational cost in homogeneous coagulation. More importantly, the SAMMC method can deal with breakage-related processes and simultaneous coagulation and nucleation with very high computational accuracy and efficiency, while the numerical results of the MMC method may significantly deviate from analytical solutions due to the introduction of sys-tematic errors. Furthermore, the RVD can achieve higher computational accuracy in multi -breakage modelling than

关键词： Monte Carlo sorting algorithm Neighbour merging Event driven Aerosol dynamics General dynamic equation

来源：评论

学校读者我要写书评

暂无评论

A Reduced Switching Frequency sorting algorithm for Modular Multilevel Converter With Circulating Current Suppression Feature

引用

IEEE TRANSACTIONS ON POWER ELECTRONICS 2019年第11期34卷 10480-10491页

作者： Samajdar, Debdeep Bhattacharya, Tanmoy Dey, Saurav Indian Inst Technol Kharagpur Dept Elect Engn Kharagpur 721302 W Bengal India

One important characteristic of modular multilevel converter (MMC) is the existence of circulating current, which consists of a dc component and a series of undesirable even-order (predominantly second-order) harmonics. However, only the dc part of the circulating current is required for power balance, the ac harmonics are unwanted. These undesirable harmonics should he suppressed to reduce device stress and power losses. Most state-of-the-art circulating current suppression techniques employ separate controllers to generate the arm reference voltage for circulating current suppression. This paper proposes an alternate approach, eliminating the need of any additional control loop. Generation of undesirable circulating current is prevented inherently in the modulation stage. Reduced switching frequency sorting algorithm based modulation framework is employed to ensure reduced switching loss. Suitability of the proposed method is validated by experiments performed on a three-phase laboratory prototype of MMC. Steady state and transient operation of the MMC in grid-connected condition is studied.

关键词： Circulating current suppression modular multilevel converter (MMC) reduced switching frequency (RSF) sorting algorithm

来源：评论

学校读者我要写书评

暂无评论

An efficient sorting algorithm for a sequence of kings in a tournament

引用

INFORMATION PROCESSING LETTERS 2001年第6期79卷 297-299页

作者： Wu, J Sheng, L Florida Atlantic Univ Dept Comp Sci & Engn Boca Raton FL 33431 USA Drexel Univ Dept Math & Comp Sci Philadelphia PA 19104 USA

A king u in a tournament is a player who beats any other player v directly or indirectly. That is, either u --> v (u beats v) or there exists a third player w such that u -->. w and w --> v. A sorted sequence of kings in a tournament of n players is a sequence of players, S = (u(1), u(2), - - -, u(n)), such that u(i) --> u(i+1) and u(i) in a king in sub-tournament T-ui = {u(i), u(i+1),..., u(n)} for i = 1, 2,..., n - 1. The existence of a sorted sequence of kings in any tournament is shown by Lou et al. [Proc. 31st Southeastern Internat. Conf. on Combinatorics, Graph Theory, and Computing, 2000] where a sorting algorithm with a complexity of Theta (n(3)) is given. In this paper, we present another constructive proof for the existence of a sorted sequence of kings of a tournament and propose an efficient algorithm with a complexity of Theta (n(2)). (C) 2001 Elsevier Science B.V. All rights reserved.

关键词： king sorting algorithm tournament computational complexity

来源：评论

学校读者我要写书评

暂无评论

Phase Disposition Modulation With sorting algorithm for Symmetrical Cascaded Multilevel Converters

引用

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS 2019年第6期55卷 7527-7536页

作者： De Paris, Jean-Michel Dantas Osorio, Caio Ruviaro Pinheiro, Humberto Carnielutti, Fernanda de Morais Univ Fed Santa Maria BR-97105900 Santa Maria RS Brazil

This paper proposes a new carrier-based modulation strategy for symmetrical cascaded multilevel converters denominated phase dispositionwith sorting (PDS). It deals with the issue of irregular distribution of PWM signals and power for each converter cell that occurs when using the conventional phase disposition (PD) modulation. Although some alternatives have been proposed in the literature for overcoming these problems, most of them do not consider operation of the converter under fault conditions on the power cells. Therefore, one of the contributions of the proposed PDS modulation strategy is the ability to evenly distribute the pulse signals for the converter semiconductor switches, resulting in the same power being processed by all cells, maintaining the good quality of the synthesized output voltages, even with faults in one or more power cells. In addition, it allows implementation in commercial digital signal processors, not requiring additional hardware. The good performance of the proposed modulation strategy is validated through experimental results for a three-phase symmetrical cascaded multilevel converter with three cells per phase, considering normal and faulty conditions on the power cells.

关键词： Carrier-based modulation operation under fault conditions phase disposition (PD) modulation sorting algorithm symmetrical cascaded multilevel converters

来源：评论

学校读者我要写书评

暂无评论

RTHS: A Low-Cost High-Performance Real-Time Hardware Sorter, Using a Multidimensional sorting algorithm

引用

IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS 2019年第7期27卷 1601-1613页

作者： Norollah, Amin Derafshi, Danesh Beitollahi, Hakem Fazeli, Mahdi Iran Univ Sci & Technol Dept Comp Engn Tehran *** Iran

This paper proposes a novel hardware-based multi-dimensional sorting algorithm and its respective architecture, called real-time hardware sorter (RTHS), for emerging data intensive processing applications where performance and resource conservation are serious concerns. The basic idea behind RTHS is to reduce the hardware complexity of parallel hardware sorting architectures (PHSAs) through a high-performance scalable matrix-based sorting method. The proposed method can also be used for implementing Min/Max queues or finding the largest/smallest records exclusively in the big data application. Implementing the RTHS design on a Virtex-7 field-programmable gate array (FPGA) reveals that the number of lookup tables (LUTs) of the proposed method has decreased by 66.3% and 87.3% compared to the conventional Bitonic sorting network (CBSN) and the state-of-the-art PHSA, respectively. In addition, the number of required registers for the proposed method has decreased by 94.8% compared to the state-of-the-art PHSA.

关键词： Bitonic sorting network field-programmable gate array (FPGA) hardware accelerator low-cost design parallel sorting real-time sorter sorting algorithm sorting network

来源：评论

学校读者我要写书评

暂无评论

A novel multi-dimensional coal and gangue X-ray sorting algorithm based on CdZnTe photon counting detectors

引用

JOURNAL OF X-RAY SCIENCE AND TECHNOLOGY 2024年第2期32卷 369-378页

作者： Kang, Yang Wu, Rui Li, Peizheng Li, Qingpei Wu, Sen Tan, Tingting Li, Yingrui Zha, Gangqiang Northwestern Polytech Univ State Key Lab Solidificat Proc Xian Peoples R China Northwestern Polytech Univ MIIT Key Lab Radiat Detect Mat & Devices Xian Peoples R China Northwestern Polytech Univ Shenzhen Res Inst Shenzhen Peoples R China

BACKGROUND: The gangue content in coal seriously affects the calorific value produced by its combustion. In practical applications, gangue in coal needs to be completely separated. The pseudo-dual-energy X-ray method does not have high sorting accuracy. OBJECTIVE: This study aims to propose a novel multi-dimensional coal and gangue X-ray sorting algorithm based on CdZnTe photon counting detectors to solve the problem of coal and gangue sorting by X-ray. METHODS: This complete algorithm includes five steps: (1) Preferred energy bins, (2) transmittance sorting, (3) one-dimensional R-value sorting, (4) two-dimensional R-value sorting, and (5) three-dimensional R-value sorting. The output range of each step is determined by prior information from 65 groups of coal and gangue. An additional 110 groups of coal and gangue are employed experimentally to validate the algorithm's accuracy. RESULTS: Compared with the 60% sorting accuracy of the Pseudo-dual-energy method, the new algorithm reached a sorting accuracy of 99%. CONCLUSIONS: Study results demonstrate the superiority of this novel algorithm and its feasibility in practical applications. This novel algorithm can guide other two-substance X-ray sorting applications based on photon counting detectors.

关键词： X-ray sorting algorithm photon counting CdZnTe detector

来源：评论

学校读者我要写书评

暂无评论

A NEW PARALLEL sorting algorithm BASED UPON MIN-MID-MAX OPERATIONS

引用

BIT 1984年第2期24卷 187-195页

作者： TSENG, SS LEE, RCT NATIONAL CHIAO TUNG UNIV GRAD INST COMP ENGNHSINCHU 300TAIWAN NATL TSING HUA UNIV GRAD INST COMP & DECIS SCIHSINCHU 300TAIWAN

In this paper we propose a new parallel sorting algorithm which is based upon an operation which sorts three elements. This algorithm is similar to the parallel odd-even merge sorting algorithm proposed by Batcher, ex... 详细信息

关键词： sorting Computational Mathematic Basic Operation sorting algorithm Operation Sort

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：