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2009中国控制与决策会议

作者： Yang Hu,Weihua Gui School of Information Science and Engineering,Central South University,Changsha 410083,China

＜正＞The algorithm is becoming more and more complex because of complicated and uncertain ***,a part of control rules could not be used usually and the scope of many parameters is defined more *** above control modes may lead to wasting of much computer system resource and decreasing system running efficiency.A new degenerating algorithm is presented in this *** unusual control modes can be founded by the degenerating *** unchanged or changed little parameters are also remembered in the *** insensitive parameters or the scope of parameters which are changed little can be saved as a common control *** adjustment control parameters in the single algorithm or switching between different controlling algorithms are degenerated to coordinate a small amount of parameters in narrow space.A real control example about logistics is illuminated in the *** sensitive parameters scope in common control mode is *** parameter database is built to save insensitive running parameters for control *** adaptive adjusting process for parameters can be completed in a short time according to sensitive parameters *** algorithm efficiency can be increased by simulation *** the same time,the system robustness is strengthened by the degenerating Mechanism.

关键词： Degenerating algorithm algorithm efficiency Control Mode Parameters Database

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Acceleration Strategies Based on an Improved Bubble Packing Method

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Communications in Computational Physics 2014年第6期16卷 115-135页

作者： Nan Qi Yufeng Nie Weiwei Zhang Department of Applied Mathematics School of ScienceNorthwestern Polytechnical University127 Youyi West RoadXi’an 710129China.

The bubble packing method can generate high-quality node sets in simple and complex ***,its efficiency remains to be *** study is a part of an ongoing effort to introduce several acceleration schemes to reduce the cost of ***,allow the viscosity coefficient c in the bubble governing equations to change according the coordinate of the bubble which are defined separately as odd and normal bubbles,and meanwhile with the saw-shape relationship with time or ***,in order to relieve the over crowded initial bubble placement,two coefficients w1 and w2 are introduced to modify the insertion *** range of those two coefficients are discussed to be w1=1,w2∈[0.5,0.8].Finally,a self-adaptive termination condition is logically set when the stable system equilibrium is *** examples illustrate that the computing cost can significantly decrease by roughly 80%via adopting various combination of proper schemes(except the uniform placement example),and the average qualities of corresponding Delaunay triangulation substantially exceed *** shows that those strategies are efficient and can generate a node set with high quality.

关键词： Bubble packing method algorithm efficiency viscosity coefficient mesh generation Delaunay triangulation.

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Framed-Quadtree Path Planning for an Underwater Vehicle with the Task of Tracking a Moving Target

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Journal of Marine Science and Application 2010年第1期9卷 27-33页

作者：高博徐德民严卫生 College of Marine Engineering Northwestern Polytechnical University

An autonomous underwater vehicle (AUV) must use an algorithm to plan its path to distant, mobile offshore objects. Because of the uneven distribution of obstacles in the real world, the efficiency of the algorithm decreases if the global environment is represented by regular grids with all of them at the highest resolution. The framed quadtree data structure is able to more efficiently represent the environment. When planning the path, the dynamic object is expressed instead as several static objects which are used by the path planner to update the path. By taking account of the characteristics of the framed quadtree, objects can be projected on the frame nodes to increase the precision of the path. Analysis and simulations showed the proposed planner could increase efficiency while improving the ability of the AUV to follow an object.

关键词： regular grid framed quadtree data structure algorithm efficiency

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TIN_DDM Buffer Surface Construction algorithm Based on Rolling Ball Acceleration Optimization Model

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Journal of Geodesy and Geoinformation Science 2020年第3期3卷 88-103页

作者： Jian DONG Zhiheng ZHANG Rencan PENG Gaixiao LI Mo WANG Department of Military Oceanograhy and Hydrography&Cartography Dalian Naval AcademyDalian 116018China Key Laboratory of Hydrographic Surveying and Mapping of PLA Dalian Naval AcademyDalian 116018China

In view of the TIN_DDM buffer surface existing in the construction and application of special data type,algorithm efficiency and precision are not matching;the paper applied the rolling ball model in the process of TIN_DDM buffer surface *** on the precision limitation analysis of rolling ball model,the overall precision control method of rolling ball model has been *** the efficiency requirement of TIN_DDM buffer surface construction,the influence principle of key sampling points and rolling ball radius to TIN_DDM buffer surface construction efficiency has been elaborated,and the rule of identifying key sampling points has also been ***,by erecting the numerical relationship between key sampling points and rolling ball radius,a TIN_DDM buffer surface construction algorithm based on rolling ball acceleration optimization model has been brought *** time complexity of the algorithm is O(n).The experiments show that the algorithm could realize the TIN_DDM buffer surface construction with high efficiency,and the algorithm precision is controlled with in 2σ.

关键词： TIN_DDM rolling ball model buffer surface construction algorithm precision algorithm efficiency

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