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基于深度学习的HARQ辅助空天地融合网络时延受限容量预测
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作者 郭凇岐 安康 +3 位作者 孙艺夫 施育鑫 朱勇刚 梁涛 《电讯技术》 北大核心 2023年第7期963-971,共9页
空天地融合网络(Satellite-Aerial-Terrestrial Integrated Network,SATIN)可以满足未来网络对全时全域全空通信和网络互联互通的需求。为了降低用户端传输时延并满足高频谱利用效率的要求,研究了基于深度学习的混合自动重复请求(Hybrid... 空天地融合网络(Satellite-Aerial-Terrestrial Integrated Network,SATIN)可以满足未来网络对全时全域全空通信和网络互联互通的需求。为了降低用户端传输时延并满足高频谱利用效率的要求,研究了基于深度学习的混合自动重复请求(Hybrid Automatic Repeat reQuest,HARQ)辅助的SATIN的时延受限容量(Delay-Limited Throughput,DLT)。为了提升性能预测效率和实时性,提出了基于卷积神经网络(Convolutional Neural Network,CNN)的性能预测方法,采用了一种去除池化层的改进CNN模型。预测结果表明,所提出的CNN预测结果较优,较Elman、BP等传统机器学习方法有更好的预测性能,其误差在10~(-3)浮动,且预测时间较其他方法大幅度减少。 展开更多
关键词 空天地融合网络(SATIN) 混合自动重复请求(HARQ) 时延受限容量 卷积神经网络(CNN)
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Spatial Distribution of Soil Salinization Based on GIS in Tianjin Binhai New Area 被引量:3
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作者 廉晓娟 李明悦 +3 位作者 王艳 张余良 贺宏达 王正祥 《Agricultural Science & Technology》 CAS 2012年第5期1046-1049,共4页
The distribution of soil salinization was investigated based on GIS and field sampling in Tianjin Binhai New Area. The results showed that the average soil total salt content was 0.818%, with an average pH of 8.43, an... The distribution of soil salinization was investigated based on GIS and field sampling in Tianjin Binhai New Area. The results showed that the average soil total salt content was 0.818%, with an average pH of 8.43, and the average CI and Na+ contents were 0.27% and 0.22%, respectively. Presenting zonal distribution feature, the soil total salt content increased gradually from west to east of Binhai New Area. Statistics on the distribution areas of different salinization degrees showed that the area of non-salinzed soils only accounted for 3.18% of the total area; with an area of 107.43 km2, mild saline soil accounted for 6.34% of the total area; the area of moderate saline soil was 173.51 km2, accounting for 10.24%; and the area of sal- inzed soils was 217.36 km2, accounting for 12.82% of the total soil area. The area of saline soils (total salt content 〉0.6%) was 1 142.8 km2, accounting 67.42% of the total land area in Binhai New Area. And the areas for the soils with total salt content of 0.6%-1.0%, 1.0%-1.5%, 〉1.5% were respectively 388.47, 411.82, 342.51 km2, accounting for 22.92%, 24.3%, 20.21% of the total area. 展开更多
关键词 GIS Soil satinization Soil total salt content Binhai New Area Spatial distribution
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刺绣中的形状分割算法 被引量:2
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作者 田启明 罗予频 胡东成 《计算机辅助设计与图形学学报》 EI CSCD 北大核心 2005年第12期2625-2630,共6页
提出一种适用于刺绣CAD系统中Satin针法的形状分割算法.该算法可将任意形状的平面区域分割成若干个条状的子区域,并且使得每个子区域关于它们的形状线大致对称.以一个改进的直骨架为形状分析基础,通过分析修剪后的骨架上的分叉点找出所... 提出一种适用于刺绣CAD系统中Satin针法的形状分割算法.该算法可将任意形状的平面区域分割成若干个条状的子区域,并且使得每个子区域关于它们的形状线大致对称.以一个改进的直骨架为形状分析基础,通过分析修剪后的骨架上的分叉点找出所有可能的分割线,然后优化这些分割线来对区域进行分割.实验结果表明:该算法对边界噪声具有一定的抗干扰能力,能够满足Satin刺绣的要求. 展开更多
关键词 形状分割 形状分析 SATIN 刺绣CAD
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Landslide susceptibility modeling based on ANFIS with teaching-learning-based optimization and Satin bowerbird optimizer 被引量:14
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作者 Wei Chen Xi Chen +2 位作者 Jianbing Peng Mahdi Panahi Saro Lee 《Geoscience Frontiers》 SCIE CAS CSCD 2021年第1期93-107,共15页
As threats of landslide hazards have become gradually more severe in recent decades,studies on landslide prevention and mitigation have attracted widespread attention in relevant domains.A hot research topic has been ... As threats of landslide hazards have become gradually more severe in recent decades,studies on landslide prevention and mitigation have attracted widespread attention in relevant domains.A hot research topic has been the ability to predict landslide susceptibility,which can be used to design schemes of land exploitation and urban development in mountainous areas.In this study,the teaching-learning-based optimization(TLBO)and satin bowerbird optimizer(SBO)algorithms were applied to optimize the adaptive neuro-fuzzy inference system(ANFIS)model for landslide susceptibility mapping.In the study area,152 landslides were identified and randomly divided into two groups as training(70%)and validation(30%)dataset.Additionally,a total of fifteen landslide influencing factors were selected.The relative importance and weights of various influencing factors were determined using the step-wise weight assessment ratio analysis(SWARA)method.Finally,the comprehensive performance of the two models was validated and compared using various indexes,such as the root mean square error(RMSE),processing time,convergence,and area under receiver operating characteristic curves(AUROC).The results demonstrated that the AUROC values of the ANFIS,ANFIS-TLBO and ANFIS-SBO models with the training data were 0.808,0.785 and 0.755,respectively.In terms of the validation dataset,the ANFISSBO model exhibited a higher AUROC value of 0.781,while the AUROC value of the ANFIS-TLBO and ANFIS models were 0.749 and 0.681,respectively.Moreover,the ANFIS-SBO model showed lower RMSE values for the validation dataset,indicating that the SBO algorithm had a better optimization capability.Meanwhile,the processing time and convergence of the ANFIS-SBO model were far superior to those of the ANFIS-TLBO model.Therefore,both the ensemble models proposed in this paper can generate adequate results,and the ANFIS-SBO model is recommended as the more suitable model for landslide susceptibility assessment in the study area considered due to its excellent accuracy and efficiency. 展开更多
关键词 Landslide susceptibility Step-wise weight assessment ratio analysis Adaptive neuro-fuzzy fuzzy inference system Teaching-learning-based optimization Satin bowerbird optimizer
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Nwomu: Hand-Made Embroidery Technique in Asanteland 被引量:2
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作者 Emmanuel Kodwo Amissah Bernard Asumeng Amoako Osuanyi Quaicoo Essel 《Journal of Literature and Art Studies》 2016年第5期500-511,共12页
The study sought to investigate the historical background of the traditional hand-made embroidery technique, the production process, and its changing trends amongst the Asantes of Ghana. Interview and observation were... The study sought to investigate the historical background of the traditional hand-made embroidery technique, the production process, and its changing trends amongst the Asantes of Ghana. Interview and observation were used in collecting the needed data at selected craft centres in the Kwabre East District, Ejisu-Juaben municipality, Kumasi sub-metro and metropolitan in the Ashanti region of Ghana. The study employed both descriptive and experimental research methods based on the qualitative research approach. It was revealed that Kente and Adinkra enjoy wide reputation and therefore are considered as prestigious clothes. However, Nwomu cloth does not have this fame, only indigenes understand its usage and the philosophy behind its production. In view of this, it is recommended that the elders who are endowed with this unique craft must open their doors to the youth to learn the craft. 展开更多
关键词 Nwomu cloth hand-made EMBROIDERY Asantes satin stitch
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Research and Application of the Mathematic Model for the Washing Shrinkage of Woven Fabric 被引量:1
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作者 傅菊芬 白伦 《Journal of Donghua University(English Edition)》 EI CAS 2007年第2期161-164,172,共5页
Having analyzed the relationships between washing shrinkage and weaving technique, parameters, material properties of woven fabrics and studied the shrinkage mechanism and its mathematical model of the plain fabric, r... Having analyzed the relationships between washing shrinkage and weaving technique, parameters, material properties of woven fabrics and studied the shrinkage mechanism and its mathematical model of the plain fabric, researchers set up a shrinkage model of the twills and satins and proposed a method for calculating the washing shrinkage based on weaving technique and parameters of fabrics. Shrinkage experiments of silk habotai, silk twill and silk satin fabrics were performed. The results were compared with those of the theoretical computations, and theoretical method is reliable. 展开更多
关键词 twill fabric satin fabric fabric parameter washing shrinkage mathematical model
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Study on the Toxicity of Stanching Satin by Internal Embedding in Rats
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作者 唐玲芳 宋玲 +4 位作者 肖杭 姜允申 程健 张珍玲 杨永年 《The Journal of Biomedical Research》 CAS 1998年第2期89-92,104,共5页
The toxicity of the new hemostatic material S-100 absorbable stanching satin was studied by embedding it in the body of rats. The staching satin embedded in the abdominal cavity of rats could be absorbed rapidly witho... The toxicity of the new hemostatic material S-100 absorbable stanching satin was studied by embedding it in the body of rats. The staching satin embedded in the abdominal cavity of rats could be absorbed rapidly without any macroscopic residue or organic abnormality in one week. After being embedded outside the dura mater of rats for a week, some stanching satin was found to remain in the form of unadherent small soft balls which disappeared in one more week. In the pathological examination no residue in cells was found in the major organs, and no degeneration, necrosis, hemorrhage or thrombosis in these organs and the vessels was observed. All the biochemical parameters in blood and routine urine examination were in the normal ranges. The results of the three behavior function tests were negative. It showed S-100 stanching satin, embedded in the body of rats for 12 weeks, had neither general toxicity nor adverse effect on the higher nervous activity, general behavior and equilibrium function of rats. 展开更多
关键词 stanching satin internal embedding TOXICITY RAT
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Benefits of satins in elderly subjects without established cardiovascular disease : A metaanalysis
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《South China Journal of Cardiology》 CAS 2013年第4期286-293,共8页
To assess whether statins reduce all-cause mortality and CV events in elderly people without established CV disease.
关键词 RR CI CV Benefits of satins in elderly subjects without established cardiovascular disease
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