2012 IEEE Fifth International Conference on Advanced Computational Intelligence (ICACI)最新文献_第3页

Effects of temperature and orientation on 3.2mm radar backscattering from ice crystals 温度和方向对冰晶3.2mm雷达后向散射的影响

2012 IEEE Fifth International Conference on Advanced Computational Intelligence (ICACI) Pub Date : 2012-10-01 DOI: 10.1109/ICACI.2012.6463266

Juxiu Wu, Ming Wei, Jie Zhou, Jinhu Wang

{"title":"Effects of temperature and orientation on 3.2mm radar backscattering from ice crystals","authors":"Juxiu Wu, Ming Wei, Jie Zhou, Jinhu Wang","doi":"10.1109/ICACI.2012.6463266","DOIUrl":"https://doi.org/10.1109/ICACI.2012.6463266","url":null,"abstract":"Millimeter wave radar signals depending on backscattering characteristics of particles and particles size distribution can be used to inverse the microphysical parameters of clouds, but ice clouds are composed of non-spherical ice crystals, so various factors of impacting on the scattering from non-spherical particles must be considered. However, there are few papers that account for the influence of temperature and orientation on the backscattering characteristics of hexagonal ice crystals with 3.2mm radar in detail. The effects are investigated by modeling the discrete dipole approximation (DDA) method in this paper. At vertical radar wave, the value of backscattering cross sections of hexagonal ice crystals with horizontal orientation (2D) is twofold more than random orientation (3D). With the antenna elevation angle increases, there is a large increase of radar cross sections for hexagonal columns, but a slight change for hexagonal plates with 2D. The contributions from orientations must be considered in calculating scattering characteristics of non-spherical ice crystals. Backscattering cross sections change slightly about 2.75% when the temperature changes from 0° to 173°. It should also be noted that aspect ratio has a large impact on radar cross sections. Such calculations can extend scattering characteristics database of ice particles. In this paper, we provide some ideas for exploring the scattering from ice crystal and theoretical basis for using the 3.2mm radar echo to inverse the characteristics of clouds.","PeriodicalId":404759,"journal":{"name":"2012 IEEE Fifth International Conference on Advanced Computational Intelligence (ICACI)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131627939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The shape edge measure of automobile airbag based on image processing 基于图像处理的汽车安全气囊形状边缘测量

2012 IEEE Fifth International Conference on Advanced Computational Intelligence (ICACI) Pub Date : 2012-10-01 DOI: 10.1109/ICACI.2012.6463253

Mujun Xie, Peng Gao, Zhiqiang Wang, Yuan-chun Li

引用次数: 0

Getting scale-free network from a small world network without growth 从没有增长的小世界网络中获得无标度网络

2012 IEEE Fifth International Conference on Advanced Computational Intelligence (ICACI) Pub Date : 2012-10-01 DOI: 10.1109/ICACI.2012.6463112

Guangping Chen, Jiabo Hao, Zhiyuan Zhang, Yumei Tang

{"title":"Getting scale-free network from a small world network without growth","authors":"Guangping Chen, Jiabo Hao, Zhiyuan Zhang, Yumei Tang","doi":"10.1109/ICACI.2012.6463112","DOIUrl":"https://doi.org/10.1109/ICACI.2012.6463112","url":null,"abstract":"A method that can be used to get scale-free network from a small-world network without growth under the mechanism of preferential attachment is proposed. Unlike the normal BA growth network model, in our model we remove an old node with a probability scaling with the degree of the node before adding a new node into the network, that make the size of the network fixed, but the nodes and edges are not fixed. If an old node has less degree, it has a larger probability to be removed, and its edges are deleted at the same time. It is found that the degree distribution based on our model obeys a form like power-law of BA model, but the scope of degree distribution in our model is much smaller than BA model. Therefore, the degree distribution's heave tail in our model is thinner than that in the normal BA model; thus it is different from the normal BA model. Meanwhile, there are some other properties in our model, for instance, the average clustering coefficient decreases with the renewed ratio and the power-law exponent increases with the renewed ratio to a limited value, which is equal to that in the normal BA model.","PeriodicalId":404759,"journal":{"name":"2012 IEEE Fifth International Conference on Advanced Computational Intelligence (ICACI)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131320725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An improved sequence-based indoor localization algorithm in WSNs 一种改进的基于序列的WSNs室内定位算法

2012 IEEE Fifth International Conference on Advanced Computational Intelligence (ICACI) Pub Date : 2012-10-01 DOI: 10.1109/ICACI.2012.6463306

Ying Yu, Lingyun Yuan, Yulan Kuang

引用次数: 2

Non-uniform mode-pursuing sampling method based on multivariate multimodal distribution model 基于多元多模态分布模型的非均匀寻模抽样方法

2012 IEEE Fifth International Conference on Advanced Computational Intelligence (ICACI) Pub Date : 2012-10-01 DOI: 10.1109/ICACI.2012.6463175

Hua Su, Liangxian Gu, Chun-lin Gong

引用次数: 0

Research on the algorithms and key factors in optimizing supply chain inventory 供应链库存优化算法及关键因素研究

2012 IEEE Fifth International Conference on Advanced Computational Intelligence (ICACI) Pub Date : 2012-10-01 DOI: 10.1109/ICACI.2012.6463200

Min Wu, Kongyu Yang

引用次数: 3

An incremental learning algorithm for improved least squares twin support vector machine 一种改进最小二乘双支持向量机的增量学习算法

2012 IEEE Fifth International Conference on Advanced Computational Intelligence (ICACI) Pub Date : 2012-10-01 DOI: 10.1109/ICACI.2012.6463207

Ling Yang, Kai Liu, Xiaodong Liang, Tao Ma

引用次数: 1

Optimal wavelet packet decomposition for rectal pressure signal feature extraction 基于小波包分解的直肠压力信号特征提取

2012 IEEE Fifth International Conference on Advanced Computational Intelligence (ICACI) Pub Date : 2012-10-01 DOI: 10.1109/ICACI.2012.6463367

E. Jiang, P. Zan, Suqin Zhang, Xiaojin Zhu, Y. Shao

引用次数: 3

Comparative analysis of two sandstorm processes caused by Mongolian cyclone 蒙古气旋两次沙尘暴过程的比较分析

2012 IEEE Fifth International Conference on Advanced Computational Intelligence (ICACI) Pub Date : 2012-10-01 DOI: 10.1109/ICACI.2012.6463267

Hengde Zhang, Zhiping Zong, Cong Hua, Yani Zhang, Bihui Zhang

{"title":"Comparative analysis of two sandstorm processes caused by Mongolian cyclone","authors":"Hengde Zhang, Zhiping Zong, Cong Hua, Yani Zhang, Bihui Zhang","doi":"10.1109/ICACI.2012.6463267","DOIUrl":"https://doi.org/10.1109/ICACI.2012.6463267","url":null,"abstract":"Two sandstorm processes caused by Mongolian cyclone were comparatively analyzed and diagnosed. The first process occurred during 19-22 March 2010 (case 1) and the second one during 28-30 April 2011 (case 2). The result showed that case 1 had wider range, stronger intensity and longer duration than case 2. Mongolian cyclones and upper cold vortex were main causes of these two cases. The cold front moved more southeastward and covered a larger area with stronger northerly wind in case 1. And the greater pressure gradient between cyclone center and high-pressure center was also contributed to the wider and stronger dust weather. Besides, secondary cold-front and supplemental cold air were propitious to the long-lasting dust weather. Vertical velocity was a good indication to sandstorms, and the upward motion area in case 1 was significantly larger than case 2. Helicity distribution demonstrated strong upward vortex motion which was helpful in sand rising at middle and lower troposphere, and the helicity in case 1 was more obvious. Cold advection and momentum downwash contributed to the intensification of surface pressure, cold high and pressure gradient, which leaded to stronger ground transformer wind and was favorable to the occurring of sandstorm. Case 1 had more obvious momentum downwash and transformer wind in the two cases. The decline of Ri along with increasing vertical wind shear and unstable stratification aroused and downstream transferred the sandstorm.","PeriodicalId":404759,"journal":{"name":"2012 IEEE Fifth International Conference on Advanced Computational Intelligence (ICACI)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128180064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance analysis of the graph-partitioning algorithms used in OpenFOAM OpenFOAM中使用的图划分算法的性能分析

2012 IEEE Fifth International Conference on Advanced Computational Intelligence (ICACI) Pub Date : 2012-10-01 DOI: 10.1109/ICACI.2012.6463129

Miao Wang, Yuhua Tang, Xiaowei Guo, Xiaoguang Ren

{"title":"Performance analysis of the graph-partitioning algorithms used in OpenFOAM","authors":"Miao Wang, Yuhua Tang, Xiaowei Guo, Xiaoguang Ren","doi":"10.1109/ICACI.2012.6463129","DOIUrl":"https://doi.org/10.1109/ICACI.2012.6463129","url":null,"abstract":"OpenFOAM is a widely used opensource CFD application. Based on mesh partitioned, applications can run in parallel to achieve better performance in OpenFOAM. When mesh generated from the liquid field is large, performance of partitioning algorithms will heavily affect the execution efficiency of the whole application. In this paper, we investigate the four partitioning algorithms implemented in OpenFOAM-Simple, Hierarchical, Scotch and Metis and analyze their performance. Performance evaluation includes partitioning time, communication overhead, quality of load balancing and application's parallel execution time based on the experiment of LinearPTT with 34,800,000 cells on Tianhe-1A. The results show that Scotch spends the most time on partitioning and Metis' partitioning time remains steady when the number of processors increases. Both Scotch and Metis introduce less communication overhead than Simple and Hierarchical. Scotch does better in balancing the cells among processors than Metis. When scales of meshes and numbers of processors increase, only Scotch and Metis are practicable with acceptable performance. But their partitioning efficiency still needs a betterment.","PeriodicalId":404759,"journal":{"name":"2012 IEEE Fifth International Conference on Advanced Computational Intelligence (ICACI)","volume":"43 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128901369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9