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2017 6th International Conference on Computer Science and Network Technology (ICCSNT)最新文献

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A new local optimization method of finite-element mesh 一种新的有限元网格局部优化方法
Pub Date : 2017-10-01 DOI: 10.1109/ICCSNT.2017.8343671
Lei Jiang, Wei Chen
In the finite element mesh analysis, researches are always done on displacement and stress in a certain area and higher accuracy is expected to be obtained in that area. If the accuracy of mesh grid is higher or the number of units is increased, the storage space of the computer relatively needs to be larger, the computing time becomes longer and some problems may not be solved by computer. In the local mesh encryption method, only the initial mesh parts of the model are encrypted. Under the condition of accuracy ensured, only the calculating number of nodes of local model needs to be increased in this method without unit dividing for the entire model. In this method, model unit density is increased, storage space and computing time is greatly reduced and the accuracy of calculating is improved.
在有限元网格分析中,通常研究的是某一区域的位移和应力,并期望在该区域获得更高的精度。如果网格网格的精度更高或者单位数增加,计算机的存储空间相对需要更大,计算时间变长,有些问题可能无法由计算机解决。在局部网格加密方法中,只对模型的初始网格部分进行加密。在保证精度的情况下,该方法只需增加局部模型的计算节点数,无需对整个模型进行单元划分。该方法增加了模型单元密度,大大减少了存储空间和计算时间,提高了计算精度。
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引用次数: 0
Design of IIR digital filter IIR数字滤波器设计
Pub Date : 2017-10-01 DOI: 10.1109/ICCSNT.2017.8343749
P. He, Hongli Chang, Han Gao, ZiYi Wang
In the field of signal process, the real-time and rapidity requirements of signal processing become higher and higher. The filter has been used widely, such as used in detecting and predicting of the signal. Digital filter has many outstanding advantages such as high stability, high precision, design flexible, easy to implement. It can overcome the problems such as voltage drift and temperature drift and noise. With the development of digital technology, digital technology is used to implement filter function. It has gotten people's attention and been used widely.
在信号处理领域,对信号处理的实时性和快速性要求越来越高。该滤波器在信号的检测和预测等方面有着广泛的应用。数字滤波器具有稳定性高、精度高、设计灵活、易于实现等突出优点。它可以克服电压漂移、温度漂移和噪声等问题。随着数字技术的发展,利用数字技术实现滤波功能。它已经引起了人们的注意并被广泛使用。
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引用次数: 1
Recommendation based on trust and distrust social relationships 推荐基于信任和不信任的社会关系
Pub Date : 2017-10-01 DOI: 10.1109/ICCSNT.2017.8343698
Zhenqian Fei, Wei Sun, Xiaoxin Sun, Guozhong Feng, Bangzuo Zhang
Recommender system has become increasingly popular in recent years, since it is an effective way to solve the problem of information overload problem. But it is still subject to some inherent problems, such as data sparseness and cold start. Many studies show that the integration of social network information is a very effective way to solve such issues. The studies on recommendation methods that incorporate social relationships, not only take into account the preferences of the user for the item, but also the interaction between the users according to their behavior and the social relationships. And now, the application of social relationships has extended from the trust relationships to the distrust relationships. While the collaborative filtering is the most important and widely used recommendation method, there is little work on combining with trust and distrust social network relationships. So, this paper proposes the methods of integration the trust and distrust social relationships, TDUCF1 and TDUCF2, and with the improved cosine similarity, to improve the collaborative filtering recommendation algorithm, which combined the users' trust and distrust social relationships, and effectively alleviated the sparseness. The experimental results show that the proposed methods outperform the state-of-art algorithms.
推荐系统是解决信息过载问题的有效途径,近年来越来越受到人们的欢迎。但它仍然存在一些固有的问题,如数据稀疏和冷启动。许多研究表明,社交网络信息的整合是解决此类问题的一种非常有效的方法。结合社会关系的推荐方法的研究,不仅考虑了用户对商品的偏好,而且考虑了用户根据其行为与社会关系之间的互动。现在,社会关系的应用已经从信任关系扩展到不信任关系。协同过滤是目前最重要、应用最广泛的推荐方法,但将信任和不信任的社会网络关系结合起来的推荐方法研究较少。为此,本文提出了整合信任与不信任社会关系、TDUCF1和TDUCF2的方法,并结合改进的余弦相似度对协同过滤推荐算法进行改进,将用户的信任与不信任社会关系结合起来,有效缓解了稀疏性。实验结果表明,所提出的方法优于现有的算法。
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引用次数: 2
Adaptively group based on the first joint sparsity models distributed compressive sensing of hyperspectral image 基于第一联合稀疏度模型的自适应分组高光谱图像分布式压缩感知
Pub Date : 2017-10-01 DOI: 10.1109/ICCSNT.2017.8343733
L. Deng, Yuefeng Zheng, P. Jia, Sichen Lu, Jiuting Yang
Hyperspectral Images (HSI) have strong spectral correlation compared with ordinary 2D images. Distributed compressed sensing (DCS) happens to exploit both intra-and inter-signal correlation structures among multiple nodes and lends itself well to hyperspectral image compression. In this paper, we propose a new algorithm of adaptive grouping for HSI compression based on the first joint sparsity model (JSM-1) of DCS. This algorithm adaptively divides one hyperspectral image into several groups of bands (GOBs) in accordance with its spectral correlation firstly, to ensure that each group of bands has strong spectral correlation. Every group of bands contains a reference band and the remaining non-reference bands, and then subtracts the reference band from each of the non-reference bands in the same group which makes the structure conform JSM-1. Then the distributed compressed sensing JSM-1 model is applied to hyperspectral image compression, encoding every residual image using CS coding. We use a joint recovery algorithm to reconstruct at the decoder. In this algorithm, the spectral similarity of high spectral images is used to get the data more sparse and improve the reconstruction effect of the compressed image, and the better compression efficiency is obtained. Experiments show the feasibility of the proposed algorithm.
与普通二维图像相比,高光谱图像具有很强的光谱相关性。分布式压缩感知(DCS)恰好利用了多个节点之间的信号内部和信号之间的相关结构,并且适合于高光谱图像压缩。本文提出了一种基于DCS第一联合稀疏度模型(JSM-1)的自适应分组HSI压缩算法。该算法首先根据高光谱图像的光谱相关性自适应地将高光谱图像分成多组波段(gob),保证每组波段具有较强的光谱相关性。每组波段包含一个参考波段和剩余的非参考波段,然后从同一组的每个非参考波段中减去参考波段,使结构符合JSM-1。然后将分布式压缩感知JSM-1模型应用于高光谱图像压缩,对每幅残差图像进行CS编码。我们使用联合恢复算法在解码器处进行重建。该算法利用高光谱图像的光谱相似度,使数据更加稀疏,提高压缩图像的重建效果,获得了较好的压缩效率。实验证明了该算法的可行性。
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引用次数: 2
A long track on backbone nodes of content sharing networks 内容共享网络骨干节点上的长轨道
Pub Date : 2017-10-01 DOI: 10.1109/ICCSNT.2017.8343728
Qiang Lu, Bo Liu, Huaping Hu
As a kind of sharing platform for files, information and resources, Content Sharing Networks (CSNs) are faced with a serious security situation of swarming malicious files, illegal information and spywares, especially the mainstream P2P (Peer-to-Peer) CSNs. Apart from the familiar importance for the rapid development and wide application of CSNs, backbone nodes should have been paid more attention for their significance to monitor and mitigate malicious sharing contents. In this paper, we proposed a comprehensive and effective determining method named MED to distinguish backbone nodes during the longest ever tracking and in-depth analysis of CSNs for nearly four years.
内容共享网络作为一种文件、信息和资源的共享平台,面临着恶意文件、非法信息和间谍软件泛滥的严重安全形势,尤其是主流的P2P (Peer-to-Peer)内容共享网络。骨干节点除了对csn的快速发展和广泛应用具有众所周知的重要性外,其在监控和缓解恶意共享内容方面的意义也应该得到更多的重视。本文提出了一种综合有效的MED识别方法,在近4年的时间跨度最长的csn跟踪和深度分析中识别骨干节点。
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引用次数: 0
Protein subnuclear location based on KLDA with fused kernel and effective fusion representation 基于融合核和有效融合表示的KLDA蛋白亚核定位
Pub Date : 2017-10-01 DOI: 10.1109/ICCSNT.2017.8343667
Yaoting Yue, Shunfang Wang
Discriminated dimensionality reduction algorithm and informative feature representation are equal importance for improving prediction accuracy of protein subnuclear. Based on this thought, this paper simultaneously proposed an effective fused kernel function and an integrated feature expression for predicting protein subnuclear location. To obtain their optimal fusion parameter respectively, the particle swarm optimization (PSO) algorithm was employed to search them during the fusing processes. To verify the feasibility of our proposed approach, a standard public dataset was adopted to carry out the numerical experiment with k-nearest neighbors (KNN) as the classifier. The last results of Jackknife test method can be as high as 94.6779% with our fused kernel and representation, which undoubtedly reveals that our proposed integration method is of efficiency in protein subnuclear localization to a large extent.
判别降维算法与信息特征表示对于提高蛋白质亚核预测精度同样重要。基于这一思想,本文同时提出了一种有效的融合核函数和一种综合特征表达式来预测蛋白质亚核定位。在融合过程中,采用粒子群优化算法(PSO)对它们进行搜索,分别获得最优融合参数。为了验证该方法的可行性,采用标准的公共数据集,以k近邻(KNN)作为分类器进行数值实验。融合核和表示后,Jackknife测试方法的最终结果高达94.6779%,这无疑表明我们提出的整合方法在很大程度上是高效的蛋白质亚核定位。
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引用次数: 1
Research on warehouse management system based on association rules 基于关联规则的仓库管理系统研究
Pub Date : 2017-10-01 DOI: 10.1109/ICCSNT.2017.8343688
Zhimin Chen, Wei Song, Lizhen Liu, Chao Du
Warehouse management is important for the development of enterprises. A good warehouse management system can enable enterprises to operate solid foundation. Using the method of manual records of data to manage enterprise warehouses has been unable to meet the current development needs of warehouse management. In this paper, we apply the Apriori algorithm to the warehouse management system. And we use the Apriori algorithm of data mining to analyze the records of the amount of goods in the warehouse, and the association rules between the goods are obtained. According to the association rules obtained by the system, the system can analyze the amount of the goods involved in the association rules. If the amount of goods is less than the minimum inventory or less than half of the maximum inventory, the system will recommend the names of goods that need to be purchased at the same time for the procurement staff. The method proposed by us can help procurement staff save time, and it can also reduce the influence of the shortage of goods for sales.
仓库管理对企业的发展至关重要。一个好的仓库管理系统可以使企业的经营打下坚实的基础。采用手工记录数据的方式对企业仓库进行管理已经不能满足当前仓库管理的发展需要。本文将Apriori算法应用到仓库管理系统中。并利用数据挖掘中的Apriori算法对仓库中货物数量的记录进行分析,得到货物之间的关联规则。根据系统获取的关联规则,系统可以分析关联规则中涉及的货物数量。如果货物数量低于最低库存或不到最大库存的一半,系统将为采购人员推荐需要同时购买的货物名称。我们提出的方法可以帮助采购人员节省时间,也可以减少销售缺货的影响。
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引用次数: 2
Iterative sparse channel estimator based on SpaRSA approach 基于SpaRSA方法的迭代稀疏信道估计
Pub Date : 2017-10-01 DOI: 10.1109/ICCSNT.2017.8343718
Xiao-jing Shi, Honglei Wang, S. Leung
In this paper, an iterative sparse channel estimation for orthogonal frequency division multiplex (OFDM) communication system is investigated based on the sparse reconstruction by separable approximation (SpaRSA), which is regarded as one of the fastest algorithms for l2-lj problem and can obtain its global optimal solution. The proposed estimator comprised of thresholding is applied to detect channel taps. Then, a modified SpaRSA with adaptive regularization parameter is used to refine the estimation of nonzero channel taps. Simulation results for typical sparse channels show effectiveness of the proposed algorithm over other existing methods.
本文研究了正交频分复用(OFDM)通信系统中基于可分离近似稀疏重建(SpaRSA)的迭代稀疏信道估计,该算法被认为是求解l2-lj问题的最快算法之一,并能获得其全局最优解。将所提出的由阈值构成的估计器应用于检测信道抽头。然后,采用自适应正则化参数的改进SpaRSA对非零通道抽头的估计进行改进。对典型稀疏信道的仿真结果表明了该算法的有效性。
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引用次数: 0
Frequency offset estimation algorithm of spread spectrum coherent heterodyne based on ISFT 基于ISFT的扩频相干外差频偏估计算法
Pub Date : 2017-10-01 DOI: 10.1109/ICCSNT.2017.8343713
Cancan Sun, Ronghua Zhou, Hangcheng Han, Xiangyuan Bu
Satellite to ground laser uplink is seriously affected by atmospheric environment, resulting in greater power attenuation than downlink. Uplink is used to transmit low speed instructions and control signals. In order to improve the sensitivity of satellite to ground uplink, and reduce the influence of large frequency offset on receiver, coherent heterodyne detection and spread spectrum technique are applied to uplink. To cut down the consumption of resources on the satellite, the inverse sparse Fourier transform (ISFT) is used to reduce the computational complexity of the frequency offset estimation algorithm. The frequency offset estimation algorithm based on ISFT is theoretically analyzed and validated by simulation. The simulation results reveal that compared with the direct detection of 16PPM, the sensitivity of spread spectrum coherent heterodyne detection is improved by 16dB when the error rate is 10−8. In the high signal-to-noise ratio environment at satellite to ground uplink, ISFT can estimate the frequency offset as accurate as IFFT while saving computational complexity.
星地激光上行链路受大气环境影响严重,功率衰减大于下行链路。上行链路用于传输低速指令和控制信号。为了提高卫星对地面上行链路的灵敏度,减少大频偏对接收机的影响,将相干外差检测和扩频技术应用于上行链路。为了减少对卫星资源的消耗,采用反稀疏傅立叶变换(ISFT)来降低频偏估计算法的计算复杂度。对基于ISFT的频偏估计算法进行了理论分析和仿真验证。仿真结果表明,当误差率为10−8时,扩频相干外差检测的灵敏度比直接检测16PPM提高了16dB。在星地上行高信噪比环境下,ISFT可以像IFFT一样准确地估计频偏,同时节省了计算量。
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引用次数: 0
Data acquisition and researches based on radar echo navigation information technology 基于雷达回波导航信息技术的数据采集与研究
Pub Date : 2017-10-01 DOI: 10.1109/ICCSNT.2017.8343687
Hanguang Zhang, Jin Bi, Jie Li, Ke Ma
In order to probe into the data acquisition method of radar echo navigation information technology, the radar unit constitution, the compression principle of sampling data of Lempel-Ziv-Welch (LZW) algorithm and two common compression algorithms are introduced. The influence of network transmission speed on radar echo data acquisition in VxWorks system is also studied. The flow chart of the compression implementation and the network transmission speed comparison diagram are analyzed. The experimental results show that the LZW compression algorithm can achieve a satisfactory compression rate when the radar echo navigation data acquisition is carried out. At the same time, users can use the memory file in VxWorks to read and write, which can speed up the network transmission. Based on the above finding, it is concluded that the data acquisition and research based on radar echo navigation information technology can speed up the network transmission by using the VxWorks system.
为了探讨雷达回波导航信息技术的数据采集方法,介绍了雷达单元组成、LZW算法的采样数据压缩原理以及两种常用的压缩算法。研究了VxWorks系统中网络传输速度对雷达回波数据采集的影响。分析了压缩实现流程图和网络传输速度对比图。实验结果表明,LZW压缩算法在进行雷达回波导航数据采集时能够获得满意的压缩率。同时,用户可以使用VxWorks中的内存文件进行读写,这样可以加快网络传输速度。基于以上发现,基于雷达回波导航信息技术的数据采集与研究,利用VxWorks系统可以加快网络传输速度。
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引用次数: 0
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2017 6th International Conference on Computer Science and Network Technology (ICCSNT)
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