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An orchard mapping index and mapping algorithm coupling orchard phenology and green-holding characteristics from time-series sentinel-2 images

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COMPUTERS AND ELECTRONICS IN AGRICULTURE 2024年 226卷

作者： Chen, Riqiang Yang, Hao Liu, Wenping Liu, Miao Qi, Ning Feng, Haikuan Zhang, Chengjian Xu, Haifeng Yang, Guijun Beijing Forestry Univ Sch Informat Sci & Technol Beijing 100083 Peoples R China Beijing Acad Agr & Forestry Sci Informat Technol Res Ctr Key Lab Quantitat Remote Sensing Agr Minist Agr & Rural Affairs Beijing 100097 Peoples R China Changan Univ Coll Geol Engn & Geomat Xian 710054 Peoples R China Nanjing Agr Univ Collaborat Innovat Ctr Modern Crop Prod Cosponsore Nanjing 210095 Jiangsu Peoples R China

Agroforestry crops such as apples, peaches and pears are horticultural crops, which are an important part of modern agriculture and are of great economic and social importance. Accurate crop data at large scales (e.g., regional) are critical for effective agricultural management and resource regulation. However, existing orchard statistics, survey data, and expert knowledge are often lagging and of low confidence, lacking detailed data on the spatial distribution of orchards. The sparse distribution and indefinite characteristics of orchards compared to field crops, as well as the large intra-class variance of fruit tree spectra, make large-scale mapping of orchards a major limitation and huge challenge. To address these challenges, we developed an orchard mapping index (OMI) based on the phenology and green-holding characteristics of fruit trees, and automated orchard mapping algorithm using sentinel-2 time-series imagery and the Google Earth Engine platform (GEE). Fruit trees have unique phenological and greening characteristics: fruit tree canopies turn green earlier, turn yellow later, and have a long greenness saturation time in annual growth cycles. The proposed OMI index significantly captures the difference in green-holding between orchards and non-orchards [1.5*Interquartile Range (IQR): 0.72-39.5 for orchards, 0.10-3.36 for non-orchards]. The mapping algorithm successfully mapped 10 m-resolution orchard maps in the Loess Plateau region of China from 2020 to 2022, with an overall accuracy of 89.95-93.51 % and a kappa of 0.80-0.87. We have additionally identified that the implementation of a fine-grained agricultural plantation zoning mapping strategy exhibits the potential to enhance the performance of orchard mapping. Our study demonstrated the potential of a phenology-based approach, sentinel image data, and the GEE platform for orchard mapping, and for the first time developed a large-scale map of orchards in the Loess Plateau region of China. This study

关键词： Orchard Orchard mapping Index (OMI) mapping algorithm Phenology Sentinel-2

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Research on Virtual Network mapping algorithm with Path Splitting Based on Sort Preprocessing

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JOURNAL OF COMPUTERS 2013年第9期8卷 2413-2420页

作者： Huang, Yong Wu, Jinzhao Guangxi Univ Nationalities Sch Informat Sci & Engn Nanning Peoples R China Chinese Acad Sci Chengdu Inst Comp Applicat Chengdu Sichuan Peoples R China Guangxi Key Lab Hybrid Computat & IC Design Anal Nanning Peoples R China

Based on the previous research, a virtual network mapping algorithm with repeatable embedding over substrate nodes is summarized, in which, the virtual nodes in the same virtual network may be assigned to the same substrate node so that some virtual links don't need to be mapped to reduce the substrate link costs and improve the mapping effectively. Additionally, in the link mapping process, path splitting is introduced to make best use of some low bandwidth to make more virtual networks mapped, which is similar to the multi-commodity flow problem. Meanwhile, we classify the virtual network requests before mapping, map the virtual networks without link splitting request firstly and assign those with it secondly. The experimental results show that the proposed algorithm and the improved scheme perform better in mapping percentage, acceptance percentage and revenue.

关键词： Virtual network mapping algorithm Path splitting Sort preprocessing

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A mapping algorithm of Scientific Workflow from BPMN to BPEL

A Mapping Algorithm of Scientific Workflow from BPMN to BPEL

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2015 International Conference on Artificial Intelligence and Industrial Engineering(AIIE 2015)

作者： X.Tian H.S.Li Y.J.Huang Q.Cai School of Computer and Information Engineering Beijing Technology and Business University

ISBN: (纸本)9781510806450

To get a general mapping algorithm for any BPD(Business Process Diagram),depth-first traversal algorithm based component is designed to deal with any BPMN(Business Process Modelling Notation) model which is composed of the tasks, events, parallel join gateway, parallel fork gateway, databased XOR decision gateway and XOR merge gateway mapping BPEL. The generated BPEL code has good maintainability and extensibility. The algorithm is implemented in the SWF system developed by Python and its validity and usability has also been proved in practical application.

关键词： SWF mapping algorithm BPMN BPEL

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P-49: New RGBW mapping algorithm for High-Quality-Image LCDs

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SID Symposium Digest of Technical Papers 2017年第1期48卷

作者： Biao Pan Jialei Yuan Xinhui Zhong Hongqing Cui De-jiun Li Po-Hua Lung Wuhan China Star Optoelectronics Technology co. LTD. China

The key issue preventing RGBW LCDs from wide application in the display market was probably the absence of a proper RGB-to-RGBW mapping algorithm with no color-distortion. In this paper, a new RGBW mapping algorithm was designed so that the hue and saturation remain unchanged from the original color. Perception experiment for new algorithm based on our intellectual energy-saving technology (IEST) product indicated that it has superior performance upon conventional RGBW and almost indiscernible to common RGB.

关键词： RGBW mapping algorithm Color-distortion Image Quality IEST

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Three-dimensional stress analysis framework for submerged floating tunnels under wave conditions

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SHIPS AND OFFSHORE STRUCTURES 2025年

作者： Liao, Haiyan Liang, Xu Wang, Baoxuan Sheng, Fangyuan Zhejiang Univ State Key Lab Ocean Sensing Zhoushan 316021 Zhejiang Peoples R China Zhejiang Univ Ocean Coll Zhoushan 316021 Zhejiang Peoples R China Zhejiang Univ Hainan Inst Sanya Peoples R China Zhejiang Univ Interdisciplinary Student Training Platform Marine Hangzhou Peoples R China

Submerged floating tunnels (SFTs) are vital future maritime infrastructure. Existing studies predominantly use simplified beam models, which fail to accurately capture the local structural stresses. To overcome this limitation, this study proposes a three-dimensional (3D) stress analysis framework to obtain detailed stress distribution of SFTs. Using the framework, this study investigates stress variations under different wave parameters, including wave heights, periods, and incident angles. The results indicate that, among the axial, circumferential, and shear stresses of the SFT shell elements, axial stress is the most sensitive to changes in the wave parameters. Wave height has the most significant influence on stress variations among the three wave parameters. When the wave height reaches 7 meters, the tensile stress in the main girder and roadbed of the SFT exceeds allowable limits, highlighting the need to enhance the tensile strength in the design.

关键词： Submerged floating tunnel detailed analysis mapping algorithm stress responses wave loads

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Cube-fx: mapping Taylor Expansion Onto Matrix Multiplier-Accumulators of Huawei Ascend AI Processors

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IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS 2025年第6期36卷 1115-1129页

作者： Tang, Yifeng Zhou, Huaman Ji, Zhuoran Wang, Cho-Li Univ Hong Kong Dept Comp Sci Hong Kong 999077 Peoples R China Univ Elect Sci & Technol China Sch Informat & Commun Engn Chengdu 611731 Sichuan Peoples R China Shandong Univ Sch Cyber Sci & Technol Qingdao 266237 Shandong Peoples R China

Taylor expansion, a mature method for function evaluations used in Artificial Intelligence (AI) applications, approximates functions with polynomials. In addition to the function evaluations, AI applications require massive matrix multiplications, inspiring manufacturers to propose AI processors with matrix multiplier-accumulators (MACs). However, compared with the powerful Matrix MACs, the vectorized units of the AI processors cannot efficiently carry the existing Taylor expansion implementation of Single Instruction Multiple Data (SIMD) parallelism. Leveraging the Matrix MACs for Taylor expansion becomes an ideal direction. In previous studies, migrating optimized algorithms to the Matrix MACs requires matrix generation during the runtime. The generation is expensive and even cancels the accelerations brought by the Matrix MACs on the AI processors, which Taylor expansion also suffers. This article presents Cube-fx, a mapping algorithm of Taylor expansion for multiple functions onto Matrix MACs. Cube-fx expresses the building and computation in matrix multiplications without inefficient dynamic matrix generation. On Huawei Ascend processors, Cube-fx averagely achieves 1.64x speedups compared with vectorized Horner's Method with 56.38$\%$% vectorized operations reduced.

关键词： Artificial intelligence Program processors Taylor series Vectors Hardware Single instruction multiple data Polynomials Memory management Systolic arrays Shape Taylor expansion algorithm Artificial Intelli-gence (AI) processors mapping algorithm

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mapping algorithms, agricultural futures, and the relationship between commodity investment flows and crude oil futures prices

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ENERGY ECONOMICS 2018年 72卷 486-504页

作者： Yan, Lei Irwin, Scott H. Sanders, Dwight R. Univ Illinois 452d Mumford Hall1301 W Gregory Dr Urbana IL 61801 USA Univ Illinois 344 Mumford Hall1301 W Gregory Dr Urbana IL 61801 USA Southern Illinois Univ Carbondale 226E Agr Bldg1205 Lincoln Dr Carbondale IL 62901 USA

Several studies employ mapping algorithms to infer index positions in Wfl crude oil futures from positions in agricultural futures and report an economically large and statistically significant impact of index positions on crude oil futures prices. In this article, we provide direct evidence that the apparent impact of index investment based on mapping algorithms is spurious. Specifically, an idiosyncratic spike in agricultural index positions during 2007-08, coupled with the spike in oil prices, causes the spurious impact of index investment on crude oil futures prices found in these earlier studies. (C) 2018 Elsevier B.V. All rights reserved.

关键词： Commodity futures Crude oil Index investment mapping algorithm

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Performance-Aware Hybrid algorithm for mapping IPs onto Mesh-Based Network on Chip

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IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS 2011年第5期E94D卷 1000-1007页

作者： Sun, Guang Lin, Shijun Jin, Depeng Li, Yong Su, Li Zhang, Yuanyuan Zeng, Lieguang Tsinghua Univ State Key Lab Microwave & Digital Commun Tsinghua Natl Lab Informat Sci & Technol Dept Elect Engn Beijing 100084 Peoples R China

Network on Chip (NoC) is proposed as a new intra-chip communication infrastructure. In current NoC design, one related problem is mapping IP cores onto NoC architectures. In this paper, we propose a performance-aware hybrid algorithm (PHA) for mesh-based NoC to optimize performance indexes such as latency, energy consumption and maximal link bandwidth. The PHA is a hybrid algorithm, which integrates the advantages of Greedy algorithm, Genetic algorithm and Simulated Annealing algorithm. In the PHA, there are three features. First, it generates a fine initial population efficiently in a greedy swap way. Second, effective global parallel search is implemented by genetic operations such as crossover and mutation, which are implemented with adaptive probabilities according to the diversity of population. Third, probabilistic acceptance of a worse solution using simulated annealing method greatly improves the performance of local search. Compared with several previous mapping algorithms such as MOGA and TGA, simulation results show that our algorithm enhances the performance by 30.7%, 23.1% and 25.2% in energy consumption, latency and maximal link bandwidth respectively. Moreover, simulation results demonstrate that our PHA approach has the highest convergence speed among the three algorithms. These results show that our proposed mapping algorithm is more effective and efficient.

关键词： mapping algorithm network on chip energy consumption latency bandwidth

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Opaque virtual network mapping algorithms based on available spectrum adjacency for elastic optical networks

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Science China(Information Sciences) 2016年第4期59卷 20-30页

作者： Hongxiang WANG Jingxi ZHAO Hui LI Yuefeng JI School of Information and Communication Engineering Beijing University of Posts and Telecommunications State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications

Optical network virtualization enables multiple virtual optical networks constructed for different infrastructure users(renters) or applications to coexist over a physical infrastructure. Virtual optical network(VON) mapping algorithm is used to allocate necessary resources in the physical infrastructure to the VON requests(VRs). In this paper, we investigate the opaque VON mapping problems in elastic optical networks(EONs). Based on the concept of available spectrum adjacency(AvS A) on links or paths, we consider both node resource and AvS A on links for node mapping, and present a link mapping method which chooses the routing and spectrum plan whose AvS A on paths is the largest among all the candidates. Finally, the overall VON mapping algorithm(i.e., AvS A-opaque VON mapping, AvS A-OVONM) coordinated node and link mapping is proposed. Extensive simulations are conducted and the results show that AvS A-OVONM has better performance of blocking probability and revenue-to-cost ratio than current algorithms.

关键词： optical network virtualization opaque virtual optical network mapping algorithm elastic optical networks (EONs)

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Mobile Networks-on-Chip mapping algorithms for Optimization of Latency and Energy Consumption

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MOBILE NETWORKS & APPLICATIONS 2022年第2期27卷 637-651页

作者： Kumar, Arvind Sehgal, Vivek Kumar Dhiman, Gaurav Vimal, S. Sharma, Ashutosh Park, Sangoh Jaypee Univ Informat Technol Dept Comp Sci & Engn Waknaghat India Govt Bikram Coll Commerce Dept Comp Sci Patiala Punjab India Ramco Inst Technol Dept Comp Sci & Engn Rajapalayam Tamil Nadu India Southern Fed Univ Rostov Na Donu Russia Chung Ang Univ Sch Comp Sci Engn Seoul South Korea

With the advancement in technology, it is now possible to integrate hundreds of cores onto single silicon semiconductor chip or silicon die. In order to provide communication between these cores, large number of resources are required and it leads to the communication problem in System-on- Chip (SoC), which is solved by introduction of Networks-on-Chip (NoC). NoC proves to be most efficient in terms of flexibility, scalability and parallelism. In this paper, the proposed mapping algorithms, Horological mapping (HorMAP), Rotational mapping (RtMAP) and Divide and Conquer mapping (DACMAP) for mapping of tasks onto cores, basically concentrate on the optimization of latency, queuing time, service time and energy consumption of topology at constant bandwidth required. The experimental results discussed in this paper shows the comparison of proposed algorithms with traditional random mapping algorithm. In this paper, 2D mesh topology with XY routing is considered for the simulation of proposed algorithms.

关键词： System-on-chip Networks-on-Chip NoC topology mapping algorithm Energy consumption

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