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Topology representing networks for the visualization of manifolds

Journal of Mathematical Modelling and algorithms 2008年第4期7卷 351-370页

作者： Vathy-Fogarassy, Agnes Werner-Stark, Agnes Abonyi, Janos Department of Mathematics and Computing University of Pannonia Veszprem 8201 P.O.Box 158 Hungary Department of Process Engineering University of Pannonia Veszprem 8201 P.O.Box 158 Hungary

In practical data mining tasks, high-dimensional data has to be analyzed. In most of the cases it is very informative to map and visualize the hidden structure of a complex data set in a low-dimensional space. In this paper a new class of mapping algorithms is defined. These algorithms combine topology representing networks and different nonlinear mapping algorithms. While the former methods aim to quantify the data and disclose the real structure of the objects, the nonlinear mapping algorithms are able to visualize the quantized data in the low-dimensional vector space. In this paper, techniques based on these methods are gathered and the results of a detailed analysis performed on them are shown. The primary aim of this analysis is to examine the preservation of distances and neighborhood relations of the objects. Preservation of neighborhood relations was analyzed both in local and global environments. To evaluate the main properties of the examined methods we show the outcome of the analysis based both on synthetic and real benchmark examples. © 2008 Springer Science+Business Media B.V.

关键词： mapping algorithm Topology representing networks Visualization of manifolds

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An algorithm for obtaining real stress field of hyperelastic materials based on digital image correlation system

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INTERNATIONAL JOURNAL OF COMPUTATIONAL MATERIALS SCIENCE AND ENGINEERING 2017年第4期6卷 1850003.1-1850003.19页

作者： Li, Ziqian Liu, Zishun Xi An Jiao Tong Univ Int Ctr Appl Mech State Key Lab Strength & Vibrat Mech Struct Sch Aerosp Xian 710049 Shaanxi Peoples R China

Soft matter with hyperelastic behavior may be harnessed for novel applications. However, it is not achievable if the mechanical behaviors of soft matter are not well understood. At present, various traditional extensometers have been used to measure the engineering strain of materials to determine the mechanical properties. The basic assumption of extensometers is that the strain is assumed to be uniform over the gage length. However, this assumption does not hold good in case of experimental specimens having significant nonuniform strain distribution, for example, tensile tests on notched specimens or materials that undergo localized deformations. Hence, it is imperative to adopt a new method which enables us to capture the actual strain field on the surface of a material. Digital image correlation (DIC) technique is an adequate approach that has been widely used in many fields of science and engineering. In this paper, we have presented a mapping algorithm for hyperelastic materials, translating the strain field provided by DIC to the stress field based on continuum mechanics. It overcomes the limitation of extensometers and captures the real stress field for such materials. This method will not only improve the measuring accuracy of stress and strain fields in current experiments, but also greatly promote the study of the localized characteristic for nonlinear and inhomogeneous materials.

关键词： DIC system real stress field continuum mechanics mapping algorithm

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UPTRA: An Ultra-Parameterized Temporal CGRA Modeling and Optimization 31

UPTRA: An Ultra-Parameterized Temporal CGRA Modeling and Opt...

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31st IEEE Annual International Symposium on Field-Programmable Custom Computing Machines (FCCM)

作者： Dai, Yuan Qiu, Yunhui Zhu, Qilong Li, Jingyuan Yin, Wenbo Wang, Lingli Fudan Univ State Key Lab ASIC & Syst Shanghai 201203 Peoples R China

ISBN: (纸本)9798350312058

Temporal Coarse-Grained Reconfigurable Architecture (CGRA) is a typical category of CGRA that supports single-cycle context switching and time-multiplexing hardware resources to perform both spatial and temporal computations. Compared with the spatial CGRA, it can be used in area and power budget-constrained scenarios, with the sacrifice of the throughput. Therefore, achieving minimum Initialization Interval (II) for higher throughput is the main objective in many works for temporal CGRA mapping. © 2023 IEEE.

关键词： Architecture modeling mapping algorithm Temporal CGRA

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mapping PedsQL™ Generic Core Scales to EQ-5D-3L utility scores in transfusion-dependent thalassemia patients

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EUROPEAN JOURNAL OF HEALTH ECONOMICS 2021年第5期22卷 735-747页

作者： Shafie, Asrul Akmal Chhabra, Irwinder Kaur Wong, Jacqueline Hui Yi Mohammed, Noor Syahireen Univ Sains Malaysia Sch Pharmaceut Sci Discipline Social & Adm Pharm George Town 11800 Malaysia Univ Sains Malaysia Inst Planning & Strateg Ctr George Town 11800 Malaysia Sabah Women & Childrens Hosp Minist Hlth Malaysia Pharm Dept Karung Berkunci 187 Kota Kinabalu 88996 Sabah Malaysia Hosp Kuala Lumpur Minist Hlth Malaysia Dept Hosp Jalan Pahang Kuala Lumpur 50586 Malaysia Hosp Sultanah Bahiyah Minist Hlth Malaysia Clin Res Ctr KM 6Jalan Langgar Alor Setar 05460 Kedah Darul Ama Malaysia

Purpose To develop a mapping algorithm for generating EQ-5D-3L utility scores from the PedsQL Generic Core Scales (PedsQL GCS) in patients with transfusion-dependent thalassemia (TDT). Methods The algorithm was developed using data from 345 TDT patients. Spearman's rank correlation was used to evaluate the conceptual overlap between the instruments. Model specifications were chosen using a stepwise regression. Both direct and response mapping methods were attempted. Six mapping estimation methods ordinary least squares (OLS), a log-transformed response using OLS, generalized linear model (GLM), two-part model (TPM), Tobit and multinomial logistic regression (MLOGIT) were tested to determine the root mean squared error (RMSE) and mean absolute error (MAE). Other criterion used were accuracy of the predicted utility score, proportions of absolute differences that was less than 0.03 and intraclass correlation coefficient. An in-sample, leave-one-out cross validation was conducted to test the generalizability of each model. Results The best performing model was specified with three out of the four PedsQL GCS scales-the physical, emotional and social functioning score. The best performing estimation method for direct mapping was a GLM with a RMSE of 0.1273 and MAE of 0.1016, while the best estimation method for response mapping was the MLOGIT with a RMSE of 0.1597 and MAE of 0.0826. Conclusion The mapping algorithm developed using the GLM would facilitate the calculation of utility scores to inform economic evaluations for TDT patients when EQ-5D data is not available. However, caution should be exercised when using this algorithm in patients who have poor quality of life.

关键词： mapping algorithm PedsQL EQ-5D-3L Utility scores Quality of life Thalassemia

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Research on a Virtual Simulation System for Master-slave Teaching of a Spraying Robot 16

Research on a Virtual Simulation System for Master-slave Tea...

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16th IEEE International Conference on Mechatronics and Automation (IEEE ICMA)

作者： Feng, Kai Wang, Zhengyu Zi, Bin Wang, Daoming Qian, Sen Hefei Univ Technol Sch Mech Engn Hefei Anhui Peoples R China

ISBN: (纸本)9781728116976

This paper presents a study on a virtual simulation system for master-slave teaching of a spraying robot. Firstly, by studying the present situation at home and abroad, the importance of virtual simulation system is shown. Then according to the characteristics of spraying robot master-slave teaching, the structure of the system is established. After the requirement analysis and function analysis of the virtual system, the framework of the virtual simulation system is established. In order to realize the function of master-slave teaching, the kinematics analysis of master and slave manipulator and the determination of master-slave mapping algorithm are carried out. And the position information collected by the master manipulator is smoothed. Through the above work, the master-slave teaching virtual simulation system is established, and the effectiveness of the system is verified by practical operation. Therefore, the virtual simulation system for master-slave teaching of a spraying robot is effective and feasible.

关键词： Spraying robot Virtual simulation Master-slave teaching Kinematics model mapping algorithm

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mapping of the EORTC QLQ-C30 to EQ-5D-5L index in patients with lymphomas

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EUROPEAN JOURNAL OF HEALTH ECONOMICS 2020年第9期21卷 1363-1373页

作者： Xu, Richard Huan Wong, Eliza Lai Yi Jin, Jun Dou, Ying Dong, Dong Chinese Univ Hong Kong Fac Med Jockey Club Sch Publ Hlth & Primary Care Hong Kong Peoples R China Chinese Univ Hong Kong Ctr Hlth Syst & Policy Res Hong Kong Peoples R China Tsinghua Univ Sch Social Sci Dept Sociol Beijing Peoples R China Chinese Univ Hong Kong Shenzhen Res Inst Shenzhen Guangdong Peoples R China

Objective The objective of this study was to develop algorithms to map the EORTC QLQ-C30 (QLQ-C30) onto EQ-5D-5L in a sample of patients with lymphomas. Methods An online nationwide survey of patients with lymphoma was carried out in China. Ordinary least squares (OLS), beta-based mixture, adjusted limited dependent variable mixture regression, and a Tobit regression model were used to develop the mapping algorithms. The QLQ-C30 subscales/items, their squared and interaction terms, and respondents' demographic variables were used as independent variables. The root mean square error (RMSE), mean absolute error (MAE), and R-squared (R-2) were estimated based on tenfold cross-validation to assess the predictive ability of the selected models. Results Data of 2222/4068 respondents who self-completed the online survey were elicited for analyses. The mean EQ-5D-5L index score was 0.81 (SD0.21, range - 0.81-1.0). 19.98% of respondents reported an index score at 1.0. In total, 72 models were generated based on four regression methods. According to the RMSE, MAE andR(2), the OLS model including QLQ-C30 subscales, squared terms, interaction terms, and demographic variables showed the best fit for overall and the Non-Hodgkin's lymphoma sample;for Hodgkin's lymphoma, the ALDVMM with 1-component model, including QLQ-C30 subscales, squared terms, interaction terms, and demographic variables, showed a better fit than the other models. Conclusion The mapping algorithms enable the EQ-5D-5L index scores to be predicted by QLQ-C30 subscale/item scores with good precision in patients living with lymphomas.

关键词： EORTC QLQ-C30 EQ-5D-5L mapping algorithm Lymphoma China

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3D-AMAP: A Latency-Aware Task mapping onto 3D Mesh-Based NoCs with Partially-Filled TSVs 25

3D-AMAP: A Latency-Aware Task Mapping onto 3D Mesh-Based NoC...

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25th Euromicro International Conference on Parallel, Distributed and Network-Based Processing (PDP)

作者： Ziaeeziabari, Hesamedin Patooghy, Ahmad Islamic Azad Univ Sci & Res Branch Comp Dept Tehran Iran Iran Univ Sci & Technol Dept Comp Engn Tehran Iran

ISBN: (纸本)9781509060580

This paper proposes a latency-aware task mapping algorithm called 3D-AMAP for 3D mesh-based NoCs with partially-filled TSVs. The 3D-AMAP algorithm divides communications of a given application graph into Low-volume (LV) and High-Volume (HV) communications. The 3D-AMAP algorithm bypasses the LV communications to partition the given application graph to some subgraphs. Then, 3D-AMAP algorithm fairly assigns 4-neighbor cores of the mesh topology between the high traffic rate tasks of the application graph to reach the best mapping. The proposed mapping algorithm maps application subgraphs one by one based on their total intra communications considering where the vertical channels are located in the network. Evaluations of the 3D-AMAP mapping algorithm are done in a wide range of working conditions using Access Noxim NoC simulator in terms of network latency. Results show that 3D-AMAP algorithm offers at least 5% and at most 76% in network latencywith respect to NMAP algorithm.

关键词： Network on chip mapping algorithm Hop count Latency Three dimensional Partially-filled TSVs

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A Cerebellar Model and Simulation of Arm Motion Control Based on Fuzzy Logic 30

A Cerebellar Model and Simulation of Arm Motion Control Base...

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30th Chinese Control and Decision Conference (CCDC)

作者： Zhang Shao-bai Zhu Ming-qian Nanjing Univ Posts & Telecommun Comp Dept Nanjing 210003 Peoples R China

ISBN: (纸本)9781538612446

This paper introduces the concept of fuzzy set and proposes a fitzzy cerehellar model for robotic manipulator control by combining the cerebellar model with the fuzzy theory. This model introduces the membership degree of fuzzy set into the input layer of cerehellar model to reflect the objective world more accurately. It can not only move the ann along a specific path like a bionic cerebellar model, but also have higher integrity. The corresponding simulation experiments are carried out using the MATLAB platform and the experimental results show that the new model can control the arm exactly like the cognitive cerebellar model after several studies, and has higher control accuracy.

关键词： Cognitive cerebellar model Fuzzy logic mapping algorithm

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Both way effects of PV Generator MPPT on BLDCM Centrifugal Pump BEPT Performance

Both way effects of PV Generator MPPT on BLDCM Centrifugal P...

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IEEE IAS/PES Power Africa Conference

作者： Kazeza, W. H. Chowdhury, S. P. Tshwane Univ Technol Dept Elect Engn Pretoria South Africa

ISBN: (纸本)9781538641637

Standalone photovoltaic powered water pumping systems (SPVWSS) have been broadly used for irrigation, agriculture, water transport and water treatment applications. They have been receiving enhanced attention for technical upgrade to further improve their performances. Design engineers have found innovative ways to improve both the PV generator's maximum power point tracking (MPPT) and the motor pumping apparatus best efficiency point tracking (BEPT) speed and ***, while designing, they have failed to consider subsystems composing the pumping scheme as interconnected and interdependent ones. In this regards, they only improved MPPT performances with total disregards of pump's BEPT optimal operating points and vice versa. In this paper, two independent control loops were separately implemented, namely, the pump mapping algorithm BEPT and PV generator fuzzy logic incremental conductance particular swarm optimization (FL-IC-PSO) MPPT algorithm. It was found that when the BEPT control loop is activated, the system is operating away from the PV generator's MPP, while when the MPPT control loop is activated, the power drawn from the PV generator is either higher or lower than that required by the motor pump set up to be operating in the vicinity of the pump's best efficiency region (BER). Findings observed in this paper laydown blueprint of next generation efficient SPVWSS to be characterised by maximum PV generated power utilization, maximum pumping efficiency and long term safe operation.

关键词： best efficiency point tracking Head flow rate curves Quasi-Z-Source Inverter Maximum power point tracking particular swarm optimization fuzzy logic incremental conductance mapping algorithm

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GTFS Bus Stop mapping to the OSM Network 8

GTFS Bus Stop Mapping to the OSM Network

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8th International Conference on Ambient Systems, Networks and Technologies (ANT) / 7th International Conference on Sustainable Energy Information Technology (SEIT)

作者： Vuurstaek, Jan Cich, Glenn Knapen, Luk Yasar, Ansar-Ul-Haque Bellemans, Tom Janssens, Davy Hasselt Univ Transportat Res Inst IMOB Agoralaan B-3590 Diepenbeek Belgium

Due to budget constraints public transportation (PT) can no longer be deployed in regions where it attracts insufficient customers. Novel techniques like demand-responsive collective transportation (DRT) are evaluated to cut costs. This requires detailed simulations that are able to predict travel demand and include trip execution. Simulating facilities acting as feeder services to time-table based PT services requires detailed and accurate information about the PT infrastructure on a network. However, there are no public data sources that combine network and PT infrastructure data with the preferred level of detail. A newly developed bus stop mapping technique is presented. It uses the OpenStreetMap (OSM) and General Transit Feed Specification (GTFS) open data sources, which are maintained independently. Merging the data into a single database requires alignment. Developing bus stop mapping algorithms is challenging due to (i) inaccurate location data, (ii) inconsistent data sources and (iii) the vastly interconnected PT network and services. Due to the inaccuracy in the GTFS stop locations and in the OSM network, pure geometric considerations might lead to multiple candidate solutions to map a stop to the network. The new technique handles all GTFS trips at once and operates under the assumption that PT operators minimize the total distance driven to complete all trips. (C) 2017 The Authors. Published by Elsevier B.V.

关键词： OpenStreetMap (OSM) General Transit Feed Specification (GTFS) Micro-Simulation Public Transport mapping algorithm

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