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Classification of (2, 2)-Stable Unfoldings of map Germs with Codimensions (?) 4

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Acta Mathematica Sinica,English Series 1996年第4期12卷 415-432页

作者： Xiong Jianfei Institute of Applied Mathematics Qingdao University, 266071 China Institute of Applied Mathematics Qingdao University China

In this paper we classify (2,2)-stable unfoldings of map germs with codimensions ≤4 by means of the algorithm given in [4] by Wassermann.

关键词： Classification of Stable Unfoldings of map Germs with Codimensions map

GLOBAL BIFURCATIONS IN A DISTURBED HAMILTONIAN VECTOR FIELD APPROACHING A 3:1 RESONANT POINCAR map (Ⅰ)

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Acta Mathematicae Applicatae Sinica 1991年第1期7卷 80-89页

作者：李继彬万世栋 Kunming Institute of Technology Yunnan University Kunming Institute of Technology Yunnan Universityn this paper we use a qualitative method to study global and local bifurcations in a disturbedHamiltonian vector field approaching a Poincare map in the 3:1 resonant case. We give explicitcalculation formulas to determine bifurcation parameters and draw various bifurcations and phaseportraits in the phase plane.

In this paper, we use a qualitative method to study global and local bifurcations in a disturbedHamiltonian vector field approaching a Poincare map in the 3:1 resonant case. We give explicitcalculation formulas to det... 详细信息

关键词： GLOBAL BIFURCATIONS IN A DISTURBED HAMILTONIAN VECTOR FIELD APPROACHING A 3 map

MELNIKOV FUNCTION AND POINCAR(?) map

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Applied Mathematics and Mechanics(English Edition) 1988年第12期9卷 1121-1129页

作者：徐振源李骊 Wuxi Institute of Light Industry Wuxi Beijing University of Technology Beijing

In this paper we give the relationship between Melnikov function and Poincare map, and a new proof for Melnikov’s method. The advantage of our paper is to give a more explicit solution and to make Melnikov function for the subharmonics bifurcation and Melnikov function which the stable manifolds and unstable manifolds intersect transversely into a formula.

关键词： map MELNIKOV FUNCTION AND POINCAR COSO

The road map for green development of Western China

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Chinese Journal of Population,Resources and Environment 2013年第3期11卷 244-252页

作者： Robyn Kruk Derek Thompson Jiyuan Liu Xiangzheng Deng Peishen Wang National Mental Health Commission Royal Roads University Canada Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Center for Chinese Agricultural Policy Chinese Academy of Sciences World Bank

China has made some remarkable achievements in sustainable development,but the constant deterioration of the overall trend of the environment has not yet been effectively *** achieve the goal of sustainable development,we must first ensure coordination and coherence of national development goals in different areas and adhere to green development *** achieve the objectives related to green development,and to clarify the direction of green development in the next 20years,a road map is needed to guide and coordinate the *** paper describes the concept of the green development road map,introduces a green development road map for the western region,and further elaborates it The road map clarifies the objectives and guiding principles of green development in the western region,points the areas that deserve more concern and institutional innovation,and builds a green development monitoring and evaluation(M&E)***,the paper provides corresponding policy recommendations based on the established road map.

关键词： green development road map the western region

THE COHERENCE COEFFICIENT map AND RESIDUE GUIDED LEAST SQUARE PHASE UNWRAPPING ALGORITHM

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Geo-Spatial Information Science 1999年第1期2卷 55-62页

作者： Zhang Li Liao Mingsheng Zhang Zuxun Zhang Yong National Laboratory for Information Engineering in Surveying Mapping and Remote Sensing WTUSM Wuhan China

The generation of high-resolution DEM from interferometric SAR has resulted in the need for accurate and efficient methods of 2-dimensional phase unwrapping. In this paper, we give a brief description of the mathematical base of phase unwrapping, and a detailed description of the unweighted and weighted least square phase unwrapping *** our algorithm combining with the weighted least square phase unwrapping guided by the branch-cuts derived from Goldstein’ s algorithm and coherence coefficient map derived from the INSAR data is provided. In our experiment we write subroutines of the Goldstein’s branch-cut algorithm,unweighted and weighted least square phase unwrapping algorithm as well as our algorithm,and construct a small experiment system to resolve the phase unwrapping problem. Finally we test our algorithm on some INSAR data. The result shows that our approach can obtain unwrapped phase correctly and efficiently.

关键词： 2-dimensional phase unwrapping interferometric SAR coherence coefficient map weighted least square phase unwrapping branch-cuts

On the Estimates of the Order of Finitely ak-determined map-germs

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Acta Mathematica Sinica,English Series 1988年第1期4卷 28-38页

作者：李养成 Institute of Mathematics Academia Sinica Department of MathematicsHunan Normal UniversityChangsha.

In this paper we deal with the estimates of the order of determinacy of finitely *** problem has been noted by mathematicians for more than ten *** the results given bysome authors for the estimates of the order of determinacy are stated with respect to α,while those given inthis paper are stated with respect to α;,where k may be any non-negative integer,and we have α;=α inparticular.

关键词： On the Estimates of the Order of Finitely a_k-determined map-germs map

Cutter Accessibility map and Its Application for 5-axis Milling Tool-path Generation

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武汉理工大学学报 2006年第S1期28卷 40-47页

作者： L. L. Li,Y. F. Zhang (Department of Mechanical Engineering,National University of Singapore 9 Engineering Drive 1,Singapore 117576) Department of Mechanical Engineering National University of Singapore 9 Engineering Drive 1Singapore 117576

In tool-path generation process for 5-axis face milling,the specification of cutter posture is one of the critical issues that contribute to the computation load. In this paper,a quick algorithm is presented to specify the cutter posture at a surface point based on the cutter’s accessibility maps (A-maps) at all the sampled points,obtained during cutter selection. Integrated with this quick algorithm,an efficient approach is proposed to generate a set of iso-planar tool-paths for finishing a given surface withmaximum machining efficiency without violating the desirable profile and scallop height tolerance. One example is given to confirm the validity of the quick algorithm for cutter posture and the efficiency of the algorithm for tool-path generation.

关键词： cutter accessibility map tool-path generation machining strip width step-over

SSR genetic linkage map construction of pea(Pisum sativum L.) based on Chinese native varieties

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The Crop Journal 2014年第Z1期2卷 170-174页

作者： Xuelian Sun Tao Yang Junjie Hao Xiaoyan Zhang Rebecca Ford Junye Jiang Fang Wang Jianping Guan Xuxiao Zong Institute of Crop Science Chinese Academy of Agricultural Sciences National Key Facility for Crop Gene Resources and Genetic Improvement Chinese Academy of Agricultural Sciences Qingdao Academy of Agricultural Sciences Department of Agriculture and Food Systems Melbourne School of Land and EnvironmentThe University of Melbourne

Simple sequence repeat(SSR)markers have previously been applied to linkage mapping of the pea(Pisum sativum L.)***,the transferability of existing loci to the molecularly distinct Chinese winter pea gene pool was limited.A novel set of pea SSR markers was accordingly *** with existing SSR sequences,the genome of the G0003973(winter hardy)×G0005527(cold sensitive)cross was mapped using 190 *** total,157 SSR markers were placed in 11 linkage groups with an average interval of 9.7 cM and total coverage of 1518 *** novel markers and genetic linkage map will be useful for marker-assisted pea breeding.

关键词： Pea SSR markers Genetic linkage map Marker-assisted breeding

DESIGN AND REALIZATION OF map DIGITIZATION SYSTEM ON MICRO-COMPUTER BASED map GRAPHIC WORKSTATION

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Geo-Spatial Information Science 1998年第1期1卷 96-100页

作者： DU Qingyun[a] WU Hehai [a] School of Land Science WTUSM Wuhan China 430079

The main purpose to develop a map Graphic Workstation on thewidely used micro-computer is that by it the whole processing of map data fromcapturing,managing,editing,updating to graphic outputting can be *** Digitization System（MDS）is the software system to deal with the initial andalso the most important *** this paper,the authors introduce a MDSon a micro-computer based map Grphic Workstation that has been qualitified forthe producation of digital *** the system is designed totally independentlyand in the general frame of the map Graphic Workstation,the capturing and man-aging and other processings for map data are in an integral manner,in which theproducation of digital map can be fulfilled *** the same time,thesystem is flexible for function extension and widely applicable to the data from dif-ferent sources and with different information characterisitcs(e.g.,the processingof Chinese characters on map).

关键词： map digitization map database menu object