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Mining important nodes in directed-weighted software network based on semi-global structure information

ICIC Express Letters 2015年第10期9卷 2859-2866页

作者： Ren, Jiadong Wu, Hongfei Yin, Tengteng Liu, Yang He, Haitao College of Information Science and Engineering Yanshan University No. 438 West Hebei Ave. Qinhuangdao China The Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province Yanshan University No. 438 West Hebei Ave. Qinhuangdao China

Software’s control flow graph can be treated as a complex software network, and a tiny fraction of key function nodes has considerable influence on the stability, reliability and robustness of the network. Identifying the top-k key nodes accurately and effectively has become an important topic in software engineering. In this paper, directedweighted function dependency network (DWFDN) is adopted to represent the function and relationship of function calling or dependency. The weight on a direct edge indicates the frequency of function calling. Weighted semi-global structure information (the weight, the relative position of a function node and the topological structure among its neighbor nodes) is taken into consideration in our approach. From the perspective of accumulating and propagating vulnerabilities, key function callers and function callees are mined respectively. Case studies on real software date show the utility of the approach. © 2015, ICIC International.

关键词： Software reliability

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An improved Wu-Huberman community discovery algorithm based on edge points

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ICIC Express Letters 2013年第11期7卷 2949-2955页

作者： Guo, Jingfeng Wang, Xiaolin Zuo, Mengfei Lv, Jiaguo College of Information Science and Engineering Yanshan University No. 438 Hebei Ave. Qinhuangdao 066004 China The Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province Yanshan University No. 438 Hebei Ave. Qinhuangdao 066004 China

There are two critical questions in the Wu-Huberman algorithm: one is picking two poles and the other is setting the threshold. By further studying the two questions, we present a method that makes the discovery of communities more precise and the scope of application of the algorithm wider. The method picks the edge nodes of two communities as two poles and finds the largest gap using the core nodes of communities, which can discover communities of arbitrary size instead of roughly the same size. © 2013 ISSN 1881-803X.

关键词： Poles

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An efficient Subspace Clustering Algorithm based on Attribute Relativity and DBSCAN

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ICIC Express Letters 2014年第6期8卷 1677-1682页

作者： Zeng, Qiang Bai, Yunyue He, Haitao Ren, Jiadong College of Information Science and Engineering Yanshan University No. 438 Hebei Ave. Qinhuangdao 066004 China The Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province Yanshan University No. 438 Hebei Ave. Qinhuangdao 066004 China

In the high-dimensional data traditional clustering algorithms tend to break down because of the curse of dimensionality, high cost of time, etc. This paper proposes a novel algorithm AReSUBCLU, an Effective Subspace Clustering Algorithm based on Attribute Relativity and DBSCAN. Active attribute is defined to reduce the dimension of data, and a subspace search tree which is constructed by attribute correlation matrix is defined to generate subspaces. Firstly, this method uses DBSCAN with the technique of weighted threshold to cluster on every active attribution. Secondly, the correlation matrix is constructed by computing the covariance of attributes. And the subspace search tree is constructed by the matrix which is used to measure the relativity of attributions. The set of nodes in each root branch of the tree is the interesting subspaces that the algorithm discovers. Finally, the subspace clusters are obtained through merging every cluster of active dimension with the usage of similarity of cluster. Evaluation with synthetic and real-world datasets demonstrates that AReSUBCLU has a good clustering quality, and capability of discovering subspace clusters of arbitrary shapes. © 2014 ISSN 1881-803X.

关键词： Clustering algorithms

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LoBa-Min-Min-SPA: Grid load balance using SPA

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Open Automation and Control systems Journal 2013年第1期5卷 87-95页

作者： Zhang, Zhongping Wen, Lijuan Wang, Zhiping College of Information Science and Engineering Yanshan University Qinhuangdao Hebei 066004 China Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province Qinhuangdao Hebei 066004 China Foreign Language College of Dalian Jiaotong University Dalian Liaoning 116052 China

In the grid environment, there are a large number of grid resources scheduling algorithms. According to the existing Min-Min scheduling algorithm in uneven load, and low resource utilization rate, we put forward LoBa-Min-Min algorithm, which is based on load balance. This algorithm first used Min-Min algorithm preliminary scheduling, then according to the standard of reducing Makespan, the tasks on heavy-loaded resources would be assigned to resources that need less time to load balance, raise resource utilization rate, and achieve lesser completion time. We used benchmark of instance proposed by Braun et al. to prove feasibility and effectiveness of the algorithm. At Last, We introduced the SPA and gave the experimental results of Min-Min-SPA and LoBa-Min-Min-SPA. © Zhang et al.;Licensee Bentham Open.

关键词： Grid computing

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Rapid modeling for large scale Anhui-Styled Architectures

Rapid modeling for large scale Anhui-Styled Architectures

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International Conference on systems and Informatics (ICSAI)

作者： Feng Xue Xiaotao Wang School of Computer Science and Information Hefei University of Technology Hefei China State Key Laboratory of Virtual Reality Technology and System Beihang University Beijing China

To construct Anhui-Styled Architecture (ASA) models rapidly and automatically, we proposed an automatic modeling method by analyzing the basic structure of ASA in-depth. Firstly, we built modules' database, composition rule database and repository database of ASA. Then, we translated each module of architecture into a node of graph and traverse these nodes using Breadth-First Traversal(BFS) algorithm of Graph to get descript document of single building. Finally, large scale scene of ASA were constructed automatically by combine the descript document and large scale ground scenes. Experimental results show that our method is rapid and effective for constructing ASA models.

关键词： Solid modeling Buildings Computational modeling Databases Layout Analytical models Cities and towns

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A novel approach to identify influential functions in complex software network based on complex network

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ICIC Express Letters 2016年第2期10卷 485-492页

作者： Huang, Guoyan Chen, Xiaojuan Wu, Hongfei Zhang, Peng Ren, Jiadong College of Information Science and Engineering No. 438 West Hebei Ave Qinhuangdao China Computer Virtual Technology and System Integration Laboratory of Hebei Province Yanshan University No. 438 West Hebei Ave Qinhuangdao China

Identifying influential nodes is an important issue in understanding the process of information diffusion in complex software networks. Researchers generally define functions as nodes, and relationship of function calls as edges to map software into complex network. This paper proposes a novel approach to identify the influential nodes in complex software network based on complex network. Firstly, we map the function and relationship of function calling or dependency to a directed weighted call network (DWCN). Secondly, we define NodeScore (NS) to evaluate the importance of nodes in network. It has higher influence when the node has lager value of NS. The NS of each node is calculated by two parts in our opinion, Direct Dependency Nodes (DDN) and Indirect Dependency Nodes (IDN). Thirdly, algorithm ComputeNodeScore is proposed to calculate NS of each node. Finally, we mine top-k nodes based on the NS. Experimental results of various versions about software Tar and cflow show the approach is effective for identifying the influential nodes. © 2016, ICIC Express Letters ICIC International.

关键词： Complex networks

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The analysis to gamma oscillations induced in high dose DHPG and spike-gamma oscillation relationship

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International Journal of Advancements in Computing technology 2012年第20期4卷 553-560页

作者： Wen, Dong Lu, Chengbiao Key Laboratory for Computer Virtual Technology and System Integration of HeBei Province Yanshan University QinhuangdaoHebei 066004 China School of Information Science and Engineering Yanshan University QinhuangdaoHebei 066004 China Institue of Electrical Engineering Yanshan University Qinhuangdao Hebei 066004 China

Neuronal oscillations in the gamma frequency range and spikes have been reported in many cortical areas in the information processing, but the role of spikes play in cortical processing remains unclear. The aim of this study was to examine the role of high dose DHPG in the generation of oscillatory field activity at gamma frequency in the medical septal diagonal band of Broca (MSDB) slice prepared from rat brain, and to determine the phase relationship between spikes and gamma oscillations. The high dose DHPG induced large amplitude field population spiking activity, which is correlated linearly with the field gamma oscillations. The relationship between timing of spikes and the phase of gamma oscillation was determined by an analysis of circular statistics. Further analysis with Rayleigh test revealed that the relationship of phase-locking between spikes and gamma rhythm is of statistical significance. These data demonstrate that DHPG-sensitive neuronal networks within medial septum are able to generate gamma oscillations which are modulated by large amplitude population spikes and phase-locking of spikes to the gamma rhythm suggest the role of memory enhancement in the presence of mGluR1 activation.

关键词： Locks (fasteners)

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Reading Chinese in Natural Scenes with a Bag-of-Radicals Prior

arXiv

引用

arXiv 2022年

作者： Liu, Ongbin Liu, Ingjie Chen, Iaxin Wang, Unhong School of Computer Science and Engineering Beihang University Beijing China State Key Laboratory of Virtual Reality Technology System Beihang University Beijing China

Scene text recognition (STR) on Latin datasets has been extensively studied in recent years, and state-of-the-art (SOTA) models often reach high accuracy. However, the performance on non-Latin transcripts, such as Chinese, is not satisfactory. In this paper, we collect six open-source Chinese STR datasets and evaluate a series of classic methods performing well on Latin datasets, finding a significant performance drop. To improve the performance on Chinese datasets, we propose a novel radical-embedding (RE) representation to utilize the ideographic descriptions of Chinese characters. The ideographic descriptions of Chinese characters are firstly converted to bags of radicals and then fused with learnable character embeddings by a character-vector-fusion-module (CVFM). In addition, we utilize a bag of radicals as supervision signals for multi-task training to improve the ideographic structure perception of our model. Experiments show performance of the model with RE + CVFM + multi-task training is superior compared with the baseline on six Chinese STR datasets. Copyright © 2022, The Authors. All rights reserved.

关键词： Embeddings

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Redundant filter-based efficient Minkwoski sum computation of polyhedra

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ICIC Express Letters 2014年第10期8卷 2939-2944页

作者： Zhang, Jianfei Guo, Xijuan Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province College of Information Science and Engineering Yanshan University No. 438 West Section of Hebei Avenue Haigang District Qinhuangdao 066004 China College of Computer and Control Engineering Qiqihar University No. 42 Wenhua Street Qiqihar 161006 China

On the basis of the introduction to basic theory of Minkowski sum, we analyze the procedure of constructing the boundary of Minkowski sum and present a new method that can compute Minkowski sum of the polyhedra based on redundant information filtering. The method can filter the edges and facets that can be processed in the next computational stage, and reduce the number of the edges and facets that must be computed to improve the computing performance. The experiments show that the presented method has better performance including computing efficiency, accuracy and degeneration problems and fits for application domains that require high efficient and accurate computation. © 2014 ICIC International.

关键词： Information filtering

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On-site measurement cadmium and lead in soil using a disposable bismuth/ionic liquid modified electrochemical sensor

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International Agricultural Engineering Journal 2015年第3期24卷 127-134页

作者： Wang, Zhiqiang Wang, Hui Li, Caihong He, Xianquan Liu, Gang College of Computer Science and Technology Shandong University of Technology ZiBo255049 China Key Laboratory of Modern Precision Agriculture System Integration Research Ministry of Education China Agricultural University Beijing100083 China

Cadmium and lead are considered to be hazardous pollutants of agricultural lands. In this paper, we reported a fast electrochemical analysis method for the on-site determination of cadmium and lead in soil samples. A simplified soil pretreatment procedure was developed to fulfill the requirements of rapid screening usage. A novel screen-printed electrode (SPE) modified with non-toxic bismuth and the ionic liquid was fabricated by low cost screen-printing technology. The experimental results indicated that the prepared electrode exhibited many specific advantages over traditional electrodes, such as minimized size, fast response, good ionic and electronic conductivity, improved antifouling capacity as well as high sensitivity and selectivity. Finally, the developed sensor coupled with the portable electrochemical instrument was applied to determine cadmium and lead in real soil samples with satisfactory results. This work proposes a portable and cheap heavy metals screening method that can rapidly highlight the polluted "hotspots" and produce reliable results in the field conditions, which holds great promise for its wide application in precision agriculture.

关键词： Soils

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