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An optimisation method of urban road green space landscape layout based on leapfrog algorithm

INTERNATIONAL JOURNAL OF ENVIRONMENTAL TECHNOLOGY AND MANAGEMENT 2023年第6期26卷 457-469页

作者： Li, Yuanying Zheng, Linlin Huanghe Jiaotong Univ Dept Art & Design Jiaozuo 454950 Peoples R China

To improve the effect of green space landscape layout optimisation and shorten the time-consuming of view layout optimisation, this paper proposes an urban road green space landscape layout optimisation method based on leapfrog algorithm. Firstly, GIS is used to collect road landscape layout data. Then, the index weight is calculated by analytic hierarchy process. The frog-leaping algorithm is used to construct the fitness objective function and solve the fitness value. Finally, the fitness values are sorted from good to bad to judge whether the current output optimal value is the global optimal value, and the final landscape layout optimisation scheme is obtained. The experimental results show that the green space landscape layout optimisation time of this method is only 8.3 s, and the rationality of landscape layout is as high as 99.02%, which shows that this method can have a good effect of road green space landscape layout optimisation.

关键词： leapfrog algorithm hierarchical single sorting judgment matrix analytic hierarchy process fitness function

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A Homogeneous Cloud Task Distribution Method Based on an Improved leapfrog algorithm

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Computer Modeling in Engineering & Sciences 2021年第7期128卷 359-379页

作者： Yunliang Huo Ji Xiong Zhixing Guo Qianbing You Yi Peng School of Mechanical Engineering Sichuan UniversityChengdu610065China Chengdu Yigao Intelligent Technology Co. Ltd.Chengdu610065China

Cloud manufacturing is a new manufacturing model with crowd-sourcing characteristics,where a cloud alliance composed of multiple enterprises,completes tasks that a single enterprise cannot accomplish by ***,compared with heterogeneous cloud tasks,there are relatively few studies on cloud alliance formation for homogeneous *** bridge this gap,a novel method is presented in this ***,a homogeneous cloud task distribution model under cloud environment was constructed,where services description,selection and combination were *** improved leapfrog algorithm for cloud task distribution(ILA-CTD)was designed to solve the proposed *** from the current alternatives,the initialization operator and the leapfrog operator in ILA-CTD can ensure that the algorithm always searches the optimal solution in the feasible ***,the processing of task allocation for 1000 pieces of medical labeling machine bottom plates was studied as a case to show the feasibility of the proposed *** superiority of ILA-CTD was also proven based on more optimal solutions found,compared with the three other methods.

关键词： Cloud manufacturing service composition tasks distribution intelligent optimization leapfrog algorithm

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Resource Scheduling of Workflow Multi-instance Migration Based on the Shuffled leapfrog algorithm

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JOURNAL OF INDUSTRIAL ENGINEERING AND MANAGEMENT-JIEM 2015年第1期8卷 217-232页

作者： Yang Mingshun Gao Xinqin Cao Yuan Liu Yong Li Yan Xian Univ Technol Fac Mech & Precis Instrument Engn Xian Peoples R China

Purpose: When the workflow changed, resource scheduling optimization in the process of the current running instance migration has become a hot issue in current workflow flexible research;purpose of the article is to investigate the resource scheduling problem of workflow multi-instance migration. Design/methodology/approach: The time and cost relationships between activities and resources in workflow instance migration process are analyzed and a resource scheduling optimization model in the process of workflow instance migration is set up;Research is performed on resource scheduling optimization in workflow multi-instance migration, leapfrog algorithm is adopted to obtain the optimal resource scheduling scheme. An example is given to verify the validity of the model and the algorithm. Findings: Under the constraints of resource cost and quantity, an optimal resource scheduling scheme for workflow migration is found, ensuring a minimal running time and optimal cost. Originality/value: A mathematical model for resource scheduling of workflow multi-instance migration is built and the shuffled leapfrog algorithm is designed to solve the model.

关键词： multi-instance migration resource scheduling leapfrog algorithm

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Current Source Implementations for the HIE-FDTD Methods

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IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS 2022年第12期32卷 1379-1382页

作者： Pandey, Ankit Kumar Saxena, Alok Kumar IIT Jammu Dept Elect Engn Jammu 181221 Jammu & Kashmir India

In this letter, the current source implementations are presented for the hybrid implicit-explicit finite-difference time-domain (HIE-FDTD), the improved HIE-FDTD, and the leapfrog HIE-FDTD methods. The asymmetry and the field errors of these HIE-FDTD methods are investigated for all possible values of the time index parameters. The proposed implementations give very low asymmetry and field errors for all the three HIE-FDTD methods. The field errors given by these HIE-FDTD methods are lower than those given by the alternating direction implicit finite-difference time-domain (ADI-FDTD) method.

关键词： Indexes Time-domain analysis Finite difference methods Stability criteria Power system stability Jamming Wireless communication Current source implementations finite-difference time-domain (FDTD) method hybrid implicit-explicit (HIE) scheme leapfrog algorithm

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Modified Newton's Method in the leapfrog Method for Mobile Robot Path Planning 1

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International Conference on Artificial Intelligence and Evolutionary Computations in Engineering Systems (ICAIECES)

作者： Matebese, Belinda Withey, Daniel Banda, Mapundi K. CSIR Mobile Intelligent Autonomous Syst Pretoria South Africa Univ Pretoria Dept Math & Appl Math Pretoria South Africa

ISBN: (数字)9789811078682

ISBN: (纸本)9789811078682;9789811078675

The problem of determining an optimal trajectory for an autonomous mobile robot in an environment with obstacles is considered. The leapfrog approach is used to solve the ensuing system of equations derived from the first-order optimality conditions of the Pontryagin's Minimum Principle. A comparison is made between a case in which the classical Newton Method and the Modified Newton Method are used in the shooting method for solving the two-point boundary value problem in the inner loop of the leapfrog algorithm. It can be observed that with this modification there is an improvement in the convergence rate of the leapfrog algorithm in general.

关键词： Trajectory planning Obstacle avoidance leapfrog algorithm Pontryagin's Minimum Principle Modified Newton algorithm

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Application of Shuffled Frog-Leaping algorithm in Web's Text Cluster Technology

Application of Shuffled Frog-Leaping Algorithm in Web's Text...

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International Conference on Web Information Systems and Mining (WISM 2011)

作者： Fang, Yun Yu, Jianxing Taiyuan Univ Technol Comp Sci & Technol Coll Taiyuan Shanxi Peoples R China

ISBN: (纸本)9783642242724

With the rapid development of Internet, more and more massive information, search engine technology developed rapidly, but the search engine's search results don't not meet the search requirements. The k-means clustering algorithm are introduced to gather web documents class, in order to improve the clustering performance, the introduction of leapfrog algorithm selection of k value aiming to improve the accuracy of search results and to increase the search engine returns results associated with the query topic.

关键词： Clustering algorithm Text clustering algorithm leapfrog algorithm

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Fast mransient simulation of power distribution networks containing dispersion based on parallel-distributed leapfrog algorithm

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IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 2007年第2期E90A卷 388-397页

作者： Watanabe, Takayuki Tanji, Yuichi Kubota, Hidemasa Asai, Hideki Univ Shizuoka Sch Adm & Informat Shizuoka 4228526 Japan Kagawa Univ Fac Engn Dept ReliabilBased Informat Syst Engn Takamatsu Kagawa 7610396 Japan Sharp Co Ltd Prod Technol Dev Grp Tenri Nara 6328567 Japan Shizuoka Univ Fac Engn Dept Syst Engn Hamamatsu Shizuoka 4328651 Japan

This paper presents a fast transient simulation method for power distribution networks (PDNs) of the PCB/Package. Because these PDNs are modeled as large-scale linear circuits consisting of a large number of RLC elements, it takes large costs to solve by conzentional circuit simulators, such as SPICE. Our simulation method is based on the leapfrog algorithm, and can solve RLC circuits of PDNs faster than SPICE. Actual PI)Ns have frequency-dependent dispersions such as the skin-effect of conductors and the dielectric loss. To model these dispersions, more number of RLC elements are required, and circuit structures of these dispersion models are hard to solve by using the leapfrog algorithm. This paper shows that the circuit structures of dispersion models can be converted to suitable structures for the leapfrog algorithm. Further, in order to reduce the simulation time, our proposed method exploits parallel computation techniques. Numerical results show that our proposed method using single processing element (PE) enables a speedup of 20-100 times and 10 times compared to HSPICE and INDUCTWISE with the same level of accuracy, respectively. In a large-scale example with frequency-dependent dispersions, our method achieves over 94% parallel efficiency with 5PEs.

关键词： circuit simulation power integrity leapfrog algorithm frequency-dependent dispersion parallel computation

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Equivalent Circuit Modeling of Multilayered Power/Ground Planes for Fast Transient Simulation

Equivalent Circuit Modeling of Multilayered Power/Ground Pla...

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Design, Automation and Test in Europe Conference and Exhibition (DATE)

作者： Watanabe, Takayuki Asai, Hideki Univ Shizuoka Sch Adm & Informat Shizuoka Japan Shizuoka Univ Fac Engn Dept Syst Engn Hamamatsu Shizuoka Japan

ISBN: (纸本)9783981080162

This paper presents a modeling method for power distribution networks (PDNs) consisting of multilayered power/ground planes of the PCB/Package. Using our proposed method, multiple stacked power/ground plane pairs having holes and apertures can be modeled as an equivalent circuit. The structure of this equivalent circuit is suitable for the Latency Insertion Method (LIM), which is one of the fast transient simulation methods based on the "leapfrog" algorithm. Numerical results show that the leapfrog algorithm enables a speed-up of 105 and 486 times compared to the linear circuit simulator based on the sparse LU-decomposition and HSPICE, respectively, with the same level of accuracy.

关键词： component power integrity power distribution network leapfrog algorithm spice

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Mathematics of periodic tables for benzenoid hydrocarbons

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JOURNAL OF CHEMICAL INFORMATION AND MODELING 2007年第3期47卷 707-715页

作者： Dias, Jerry Ray Univ Missouri Dept Chem Kansas City MO 64110 USA

The upper and lower bounds for invariants of polyhex systems based on the Harary and Harborth inequalities are studied. It is shown that these invariants are uniquely correlated by the Periodic Table for Benzenoid Hydrocarbons. A modified periodic table for total resonant sextet ( TRS) benzenoids based on the invariants of Ds and r( empty) is presented;Ds is the number of disconnections among the empty rings for fused TRS benzenoid hydrocarbons. This work represents a contribution toward deciphering the topological information content of benzenoid formulas.

关键词： RESONANT SEXTET BENZENOIDS CONSTANT NUMBER STRAIN-FREE TOPOLOGICALCHARACTERISTICS PERIMETER TOPOLOGY leapfrog algorithm ISOMERS SERIES ENUMERATION

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A classical valence bond view of cylinder-shaped and fully benzenoid-like polyarenes (polycyclic aromatic hydrocarbons) of large size

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POLYCYCLIC AROMATIC COMPOUNDS 2004年第3期24卷 195-206页

作者： Morikawa, T Narita, S Klein, DJ Joetsu Univ Educ Dept Chem Joetsu 9438512 Japan Shinshu Univ Fac Text Sci & Technol Nagano Japan Texas A&M Univ Galveston TX 77553 USA

This note first defines a class of cylindrical polyarenes polycyclic aromatic hydrocarbons (PAHs) C2(m+l) H-2n, for which the periphery is acenic. From this class the leapfrog algorithm derives the second class of cylindrical PAHs C6nmH4n, where the periphery is phenacenic. One further application of this algorithm to the second class leads to the third class of cylindrical PAHs C12nmH8n, where the less regular periphery has 2n capes (i.e., hexagons exposed on four adjacent sides to the external "sea" of space). Each molecule in the second and third classes is totally covered by aromatic sextets, that is, appears related to a fully benzenoid hydrocarbon (FBH). The Pauling bond order, and several new indices derived from the Pauling bond order and Clar sextet counts are calculated,for the three classes with increasing numbers of carbons. This calculation suggests that a typical cylindrical PAH becomes more graphite-like than a typical flat FBH.

关键词： aromatic sextet carbon nanotube cylindrical polyarene fully benzenoid leapfrog algorithm Pauling bond order total resonant

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