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Artificial life techniques for reporting cell planning in mobile computing 16

Artificial life techniques for reporting cell planning in mo...

引用

16th International parallel and Distributed Processing Symposium, IPDPS 2002

作者： Subrata, R. Zomaya, A.Y. Parallel Computing Research Laboratory Department of Electrical and Electronic Engineering University of Western Australia PerthWA6907 Australia

ISBN: (纸本)0769515738

This paper discusses the use of genetic algorithm (GA), tabu search (TS), and ant colony algorithm (ACA) to solve the reporting cells planning problem. In the reporting cell location management scheme, some cells in the network are designated as reporting cells;mobile terminals update their positions (location update) upon entering one of these reporting cells. To create such a planner, a GA, TS, as well as several different AC algorithms are implemented. The effectiveness of each algorithm is shown for a number of test problems. © 2002 IEEE.

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Visible-Infrared Image Fusion Based on Double- Density Wavelet and Thermal Exchange Optimization 5

Visible-Infrared Image Fusion Based on Double- Density Wavel...

引用

5th IEEE Advanced Information Technology, Electronic and Automation Control Conference, IAEAC 2021

作者： Guo, Hao Chen, Jingyu Yang, Xuan Jiao, Qingliang Liu, Ming Beijing Institute of Environmental Features Beijing China Key Laboratory of Database and Parallel Computing of Heilongjiang Province Harbin China

Infrared and visible image fusion has been a hot issue in image fusion. However, the parameters and result image have many proposed. In this paper, a novel visible infrared image fusion algorithm based on double-density wavelet and thermal exchange optimization is proposed. The pre-processed infrared and visible images are decomposed into detail layers and background layers by double-density wavelet transform. Thermal exchange optimization is used to estimate the number of layers and weight thresholds of decomposition. Experimental shows that both visual effects and quantitative analysis of proposed algorithm can get the best results. © 2021 IEEE.

关键词： Image fusion

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Optimization of physics-based equivalent circuits for microstrip patch antennas

Optimization of physics-based equivalent circuits for micros...

引用

2007 IEEE Antennas and Propagation Society International Symposium, AP-S

作者： Chiu, Tang-Jung Kuo, Yi-Ting Chao, Hsueh-Yung Li, Yi-Ming High-Frequency EDA Laboratory Parallel and Scientific Computing Laboratory Department of Communication Engineering National Chiao Tung University Hsinchu 300 Taiwan

No abstract available

ISBN: (纸本)1424408776

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Rethinking benchmarking for NVM-based file systems 16

Rethinking benchmarking for NVM-based file systems

引用

7th ACM SIGOPS Asia-Pacific Workshop on Systems, APSys 2016

作者： Dong, Mingkai Yu, Qianqian Zhou, Xiaozhou Hong, Yang Chen, Haibo Zang, Binyu Shanghai Key Laboratory of Scalable Computing and Systems Institute of Parallel and Distributed Systems Shanghai Jiao Tong University China

ISBN: (纸本)9781450342650

Fast, byte-addressable NVM promises near-cache latency and near memory bus throughput for file systems, which is evident by recent development of a number of NVM file systems (NVMFS). However, a key approach to measuring their performance, file system benchmarks, remains unchanged as those for disk-based file systems (DFS). In this paper, we analyze the pitfalls of using DFS benchmarks to evaluate NVMFS and propose several changes to existing DFS benchmarks to better characterize the performance of NVMFS. © 2016 ACM.

关键词： Benchmarking

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NUMA-aware graph-structured analytics 2015

NUMA-aware graph-structured analytics

引用

20th ACM SIGPLAN Symposium on Principles and Practice of parallel Programming, PPoPP 2015

作者： Zhang, Kaiyuan Chen, Rong Chen, Haibo Shanghai Key Laboratory of Scalable Computing and Systems Institute of Parallel and Distributed Systems Shanghai Jiao Tong University China

ISBN: (纸本)9781450332057

Graph-structured analytics has been widely adopted in a number of big data applications such as social computation, web-search and recommendation systems. Though much prior research focuses on scaling graph-analytics on distributed environments, the strong desire on performance per core, dollar and joule has generated considerable interests of processing large-scale graphs on a single server-class machine, which may have several terabytes of RAM and 80 or more cores. However, prior graph-analytics systems are largely neutral to NUMA characteristics and thus have suboptimal performance. This paper presents a detailed study of NUMA characteristics and their impact on the efficiency of graph-analytics. Our study uncovers two insights: 1) either random or interleaved allocation of graph data will significantly hamper data locality and parallelism;2) sequential inter-node (i.e., remote) memory accesses have much higher bandwidth than both intra- and inter-node random ones. Based on them, this paper describes Polymer, a NUMA-aware graph-analytics system on multicore with two key design decisions. First, Polymer differentially allocates and places topology data, application-defined data and mutable runtime states of a graph system according to their access patterns to minimize remote accesses. Second, for some remaining random accesses, Polymer carefully converts random remote accesses into sequential remote accesses, by using lightweight replication of vertices across NUMA nodes. To improve load balance and vertex convergence, Polymer is further built with a hierarchical barrier to boost parallelism and locality, an edge-oriented balanced partitioning for skewed graphs, and adaptive data structures according to the proportion of active vertices. A detailed evaluation on an 80-core machine shows that Polymer often outperforms the state-of-the-art single-machine graph-analytics systems, including Ligra, X-Stream and Galois, for a set of popular real-world and synthetic grap

关键词： Random access storage

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MND: An information of detected neighbors based multi-channel neighbor discovery protocol for wireless sensor networks

MND: An information of detected neighbors based multi-channe...

引用

6th China Conference of Wireless Sensor Networks, CWSN 2012

作者： Li, Jinbao Wang, Zhigang Yao, Liang Guo, Longjiang School of Computer Science and Technology Heilongjiang University Key Laboratory of Database and Parallel Computing of Heilongjiang Province Harbin 150080 China

ISBN: (纸本)9783642362514

Multi-channel neighbor discovery protocol based on information of detected neighbors for wireless sensor networks is proposed in this paper, called MND. To make sure that the discovery among nodes is as quick as possible, MND uses the schedule mechanism in which the nodes compute the potential neighbors set so as to calculate the sleep and wake schedule of the node. To minimize the influence of channel conflict to the performance, MND uses multi-channel mechanism and calculates the required total number of channels according to the duty cycle and network density. Through analysis, we can get how to choose the total number of channels for each node and the fact that the common neighbor node of the neighbors of a node is the neighbor of this node in a large probability. The simulation and test-bed experiment results show the discovery rate and discovery latency of MND is higher and lower, respectively. © 2013 Springer-Verlag.

关键词： Sensor nodes

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A practical performance analysis of stream reuse techniques in peer-to-peer VoD systems

引用

10th International European Conference on parallel Processing, Euro-Par 2004

作者： de Pinho, Leonardo Bidese de Amorim, Claudio Luis Parallel Computing Laboratory Federal University of Rio de Janeiro Rio de JaneiroRJ Brazil

ISBN: (纸本)3540229248

Although many works have reported simulated performance benefits of stream reuse techniques to the scalability of VoD systems, these techniques have been rarely evaluated in practical implementations of scalable VoD servers. In this work we investigate the behavior of representative stream reuse techniques in the GloVE system, a low-cost VoD platform whose scalable performance depends on the combination of the stream techniques it uses. More specifically, we show experimental results focusing on the requirements of the amount of server’s channels and aggregate bandwidth that GloVE demands for several combinations of stream reuse techniques. Overall, our results reveal that stream reuse techniques in isolation offer limited performance scalability to VoD systems and only balanced combinations of batching, chaining, and patching techniques explains the scalable performance of GloVE on delivering popular videos with low startup latency while using the smallest number of server’s channels. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Scalability

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Influence Equilibrium Problem Research Based on Common Interests in Mobile Social Network 12

Influence Equilibrium Problem Research Based on Common Inter...

引用

12th International Conference on Mobile Ad-Hoc and Sensor Networks, MSN 2016

作者： Li, Jinbao Han, Yue Zhu, Jinghua School of Computer Science and Technology Heilongjiang University China Key Laboratory of Database and Parallel Computing of Heilongjiang Province Harbin China

ISBN: (纸本)9781509056965

Influence maximization refers to the number of influenced nodes reach to maximum by finding a set of seed nodes in social network. Due to peoples' excessive concentration of attention, sometimes, negative effects will appear during the influence propagation. However, the negative effects on influence propagation are not involved in the existing research work. In this paper, we consider the influence equilibrium problem in mobile social network. The goal of influence equilibrium is to balance the influential range of different kinds of seed sets through the way of node scheduling. Our goal is to reduce the negative effects by transforming the status of influence from excessive concentration to relatively balanced. There are two main challenges: (1) which nodes should be scheduled in mobile social network in order to achieve a balanced effect. (2) how to schedule the nodes. To address the two challenges, we estimate the randomness of nodes and then schedule the nodes which have high randomness. The entropy-based random walk select balance algorithm(RSB) is proposed in this paper. To achieve the balanced effect, random walk procedure is adopted to choose the sets that can receive the scheduled nodes during the scheduling phase. However, new imbalance may arise during this procedure. Thus, the entropy-based max-min balance algorithm(MMB) is proposed to deal with the new imbalance caused by RSB algorithm. Theoretical analysis and experimental results show that the RSB and MMB algorithm can balance the influence range and MMB performs better than RSB. © 2016 IEEE.

关键词： Entropy

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FasterBERT with Double Loss Function Based on Batch Data Preprocessing 2

FasterBERT with Double Loss Function Based on Batch Data Pre...

引用

2nd International Conference on Electronics, Communications and Information Technology, CECIT 2021

作者： Duan, Pengqi Zheng, Yudong Lu, Jun College of Computer Science and Technology Heilongjiang University HLJU Key Laboratory of Database and Parallel Computing of Heilongjiang Province Harbin China

ISBN: (纸本)9781665437578

Even though pre-trained language models like BERT and XLNet have produced significant consequences on a variety of tasks of natural language processing, they are difficult to deploy in practical applications due to their large number of parameters, and huge calculation and memory costs. In order to improve the training speed and inference speed of the pre-trained model, the FasterBERT model is proposed in this paper. This model combines batch data preprocessing method with knowledge distillation. It increases the model to increase the model speed and maintains the original accuracy. Furthermore, double loss function is incorporated during the knowledge distillation process in this paper, so that the model can better learn the knowledge of the teacher model and the knowledge of the real labels. The accuracy of the model is improved. The effectiveness of the FasterBERT model is demonstrated on 12 datasets in this paper. Training speed of the FasterBERT is 1.1-2.2 times higher than FastBERT and 2-43 times higher than BERT. In addition, the accuracy is up to 0.6% higher than that of FastBERT, and the accuracy is better than that of the BERT model on three datasets. The experiments show that the FasterBERT model proposed in this paper performs well on six Chinese datasets and six English datasets. The speed is greatly improved while the accuracy of the task also has a significant effect. © 2021 IEEE.

关键词： Speed

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Energy band calculation of Si/Si0.7Ge0.3Nanopillars in k→space

Energy band calculation of Si/Si0.7Ge0.3Nanopillars in k→sp...

引用

2020 International Conference on Simulation of Semiconductor Processes and Devices, SISPAD 2020

作者： Chuang, Min-Hui Li, Yiming Parallel and Scientific Computing Laboratory Institute of Communications Engineering National Chiao Tung University Hsinchu City Hsinchu300 Taiwan

ISBN: (纸本)9784863487635

In this work, we explore the energy band of the well-aligned silicon (Si) nanopillars (NPs) embedded in Si0.7Ge0.3 matrix fabricated by neutral beam etching. Instead of real-space modeling, we formulate and solve the Schrödinger equation with an effective mass approach using 3D finite-element simulation in k→ space. This approach enables us to calculate the electronic structure in a computationally effective manner. The effects of the height, radius, separation, and shape of Si NPs on the energy band and density of states are calculated and discussed. The effect of the radius on the electron energy band control is significant while that of the shape is marginal owing to high geometry aspect ratio. In contrast with the results of electrons, both the radius and separation play crucial role in tuning the energy band of holes;consequently, they govern the variation of energy band gap of Si/Si0.7Ge0.3 NPs. © 2020 The Japan Society of Applied Physics.

关键词： Silicon

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