International Conference on Computers and Their Applications最新文献

A Framework for Word Segmentation in Images using Density-based Clustering 基于密度聚类的图像分词框架

International Conference on Computers and Their Applications Pub Date : 2020-03-09 DOI: 10.29007/hq3n

Hui Guo, Qin Ding

引用次数: 0

Channel-Matched OFDM (CM-OFDM) for Enhanced Performance of Multiuser Systems Operating in Underwater Acoustic Channels 提高水声信道多用户系统性能的信道匹配OFDM (CM-OFDM)

International Conference on Computers and Their Applications Pub Date : 2020-03-09 DOI: 10.29007/kmzx

S. El-Khamy, Dalia Ibrahim

{"title":"Channel-Matched OFDM (CM-OFDM) for Enhanced Performance of Multiuser Systems Operating in Underwater Acoustic Channels","authors":"S. El-Khamy, Dalia Ibrahim","doi":"10.29007/kmzx","DOIUrl":"https://doi.org/10.29007/kmzx","url":null,"abstract":"The design of multiuser OFDM underwater acoustic (UWA) communication systems is very challenging due to the time-varying and frequency selective fading of UWA channels. The key for ensuring a reliable optimum transmission for every user is the suitable resource assignment for each. This paper proposes a new adaptive channelmatched OFDM scheme (CM-OFDM) to overcome the performance degradation caused by the frequency selective fading across the OFDM subcarriers. In the proposed scheme, the OFDM subcarriers are sorted depending on their corresponding channel gains. Then the resource assignment to the different users is accomplished according to their required quality of service (QOS). The user with the highest QOS is assigned the best subcarriers and the other users are similarly assigned the remaining subcarriers. This optimized resource assignment technique guarantees enhanced performance with no need of increasing the transmitted power or changing the modulation schemes. The performance of the proposed technique is investigated and is compared with uniform and random subcarriers’ assignment methods used for multiuser OFDM systems. The simulations are performed for a multipath frequency selective UWA channel model. The simulation results clearly show the advantages of CM-OFDM scheme for the users with high QOS on the expense of a slight degradation in the performance for the other user with lower QOS. EPiC Series in Computing Volume 69, 2020, Pages 345–354 Proceedings of 35th International Conference on Computers and Their Applications G. Lee and Y. Jin (eds.), CATA 2020 (EPiC Series in Computing, vol. 69), pp. 345–354","PeriodicalId":264035,"journal":{"name":"International Conference on Computers and Their Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129431420","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

NRDC Data Visualization Web Suite NRDC数据可视化Web套件

International Conference on Computers and Their Applications Pub Date : 2020-03-09 DOI: 10.29007/rkqh

Andrew Munoz, F. Harris, S. Dascalu

引用次数: 0

Implementing Timed Petri net for Modeling and Simulation in Card Gameplay 卡牌游戏建模与仿真的定时Petri网实现

International Conference on Computers and Their Applications Pub Date : 2020-03-09 DOI: 10.29007/htqb

Garrett Hope, Paul Brodhead, Seung-yun Kim

引用次数: 1

Reducing error propagation for long term energy forecasting using multivariate prediction 利用多元预测减少长期能源预测的误差传播

International Conference on Computers and Their Applications Pub Date : 2020-03-09 DOI: 10.29007/mbb7

Maher Selim, Ryan Zhou, Wenying Feng, Omar Alam

{"title":"Reducing error propagation for long term energy forecasting using multivariate prediction","authors":"Maher Selim, Ryan Zhou, Wenying Feng, Omar Alam","doi":"10.29007/mbb7","DOIUrl":"https://doi.org/10.29007/mbb7","url":null,"abstract":"Many statistical and machine learning models for prediction make use of historical data as an input and produce single or small numbers of output values. To forecast over many timesteps, it is necessary to run the program recursively. This leads to a compounding of errors, which has adverse effects on accuracy for long forecast periods. In this paper, we show this can be mitigated through the addition of generating features which can have an “anchoring” effect on recurrent forecasts, limiting the amount of compounded error in the long term. This is studied experimentally on a benchmark energy dataset using two machine learning models LSTM and XGBoost. Prediction accuracy over differing forecast lengths is compared using the forecasting MAPE. It is found that for LSTM model the accuracy of short term energy forecasting by using a past energy consumption value as a feature is higher than the accuracy when not using past values as a feature. The opposite behavior takes place for the long term energy forecasting. For the XGBoost model, the accuracy for both short and long term energy forecasting is higher when not using past values as a feature.","PeriodicalId":264035,"journal":{"name":"International Conference on Computers and Their Applications","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121595229","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

On relationships between imbalance and overlapping of datasets 数据集不平衡与重叠的关系

International Conference on Computers and Their Applications Pub Date : 2020-03-09 DOI: 10.29007/h71z

Waleed Almutairi, R. Janicki

引用次数: 3

New Monitoring Architectures for underwater oil/Gas Pipeline using Hyper sensors 基于超传感器的水下油气管道新型监测体系

International Conference on Computers and Their Applications Pub Date : 2020-03-09 DOI: 10.29007/c84d

Huda Aldosari, Raafat S. Elfouly, R. Ammar, Mohammad Alsulami

引用次数: 6

SOC and SOH Monitoring Algorithms for Lithium Batteries Using Multilayer Neural Networks 基于多层神经网络的锂电池SOC和SOH监测算法

International Conference on Computers and Their Applications Pub Date : 2020-03-09 DOI: 10.29007/m89x

Jong-Hyun Lee, Hyun-Sil Kim, Insoo Lee

引用次数: 0

New Approach to Teaching Computer Programming to Freshmen 大学新生计算机程序设计教学的新方法

International Conference on Computers and Their Applications Pub Date : 2020-03-09 DOI: 10.29007/sl43

Jacob Sukhodolsky

引用次数: 0

Age-group Classification Using 3DHOG Descriptor Applied to Depth Maps 使用3DHOG描述符对深度图进行年龄组分类

International Conference on Computers and Their Applications Pub Date : 2020-03-09 DOI: 10.29007/rvq6

Nabila Mansouri, Hana Bougueddima, Y. Jemaa

{"title":"Age-group Classification Using 3DHOG Descriptor Applied to Depth Maps","authors":"Nabila Mansouri, Hana Bougueddima, Y. Jemaa","doi":"10.29007/rvq6","DOIUrl":"https://doi.org/10.29007/rvq6","url":null,"abstract":"Age estimation has lots of real-world applications, such as security control, biometrics, customer relationship management, entertainment and cosmetology. In fact, facial age estimation has gained wide popularity in recent years. Despite numerous research efforts and advances in the last decade, traditional human age-group recognition with the sequence of 2D color images is still a challenging problem. The goal of this work is to recognize human age-group only using depth maps without additional joints information. As a practical solution, we present a novel representation of global appearance of aging-effect such as wrinkles’ depth. The proposed framework relay, first-of-all, on an extended version of Viola-Jones algorithm for face and region of interest (most affected by aging) extraction. Then, the 3D histogram of oriented gradients is used to describe local appearances and shapes of the depth map, for more compact and discriminative aging effect representation. The presented method has been compared with the state-of-the-art 2D-approaches on public datasets. The experimental results demonstrate that our approach achieves a better and more stable performances.","PeriodicalId":264035,"journal":{"name":"International Conference on Computers and Their Applications","volume":"144 46","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133086925","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