一致逼近
一致逼近的相关文献在1979年到2018年内共计108篇,主要集中在数学、自动化技术、计算机技术、社会科学丛书、文集、连续性出版物
等领域,其中期刊论文104篇、会议论文2篇、专利文献43316篇;相关期刊62种,包括绍兴文理学院学报、高师理科学刊、韩山师范学院学报等;
相关会议2种,包括1999年中国智能自动化学术会议、1999年中国神经网络与信号处理学术会议等;一致逼近的相关文献由114位作者贡献,包括涂天亮、宣培才、周小华等。
一致逼近—发文量
专利文献>
论文:43316篇
占比:99.76%
总计:43422篇
一致逼近
-研究学者
- 涂天亮
- 宣培才
- 周小华
- 游功强
- 赵德钧
- 丁孝全
- 刘文田
- 刘淑珍
- 孙富春
- 岳兵
- 张晓萍
- 徐群飞
- 朱来义
- 李坤杰
- 涂星原
- 王香庆
- 程瑞敏
- 谢林森
- 赵静辉
- 辛晓东
- 鲁凤菊
- 丁涛
- 万秋兰
- 于巍
- 伍卫国
- 侯象乾
- 傅明
- 傅红娟
- 冯博琴
- 刘丽霞
- 刘华富
- 刘孝书
- 刘开弟
- 刘雅娜
- 卫颜俊
- 吴菁晶
- 周四望
- 周学勤
- 周静伟
- 喻怀仁
- 孙世良
- 孙永生
- 宋儒瑛
- 宋占杰
- 尚金成
- 庄方敏
- 开依沙尔
- 张世禄
- 张建明
- 张振川
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贾鲁昆;
程金发;
温泳铭
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摘要:
We can construct a Poincaré map near a hyperbolic point which joins a homoclinic orbit.But in general,it cannot be uniformly approximated linearly in its whole domain.In this paper,we first show a claim in Stephen Wiggins' proof is wrong by an example,and then give a sufficient condition under which the Poincaré map can be approximated linearly in its whole domain.In the end,using our method we get a subset in which the Poincaré map can be linearly approximated.%在连接同宿轨的双曲不动点附近可以构造一个庞卡莱映射,但一般来说,该庞卡莱映射及其线性逼近在其整个定义域内无法做到一致逼近.通过一个例子说明Wiggins S证明中的一个错误,给出庞卡莱映射在整个定义域内能被逼近的一个充分条件,并证明在庞卡莱映射定义域的一个子集内,该映射与其线性化映射可以做到一致逼近.
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卫颜俊;
冯博琴;
伍卫国
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摘要:
针对传统多阈值图像分割算法的计算复杂性,以及由图像直方图中毛刺的干扰带来的算法不稳定等缺点,提出一种基于伯恩斯坦多项式一致逼近的多阈值图像分割算法。首先根据逼近论中的威尔斯托拉斯定理构造图像直方图曲线的伯恩斯坦多项式,然后将图像直方图的峰谷值计算问题化简为伯恩斯坦多项式的极值问题,该极值问题可由伯恩斯坦多项式函数的一次、二次微分导出,最后依据这些极值和极性应用分类算法自动标注图像直方图的实际峰谷值,由此完成基于多阈值的图像分割。实验结果表明所提算法不受直方图中毛刺的干扰,算法整体稳定,冗余计算少,时间复杂度小,用时少,效率高,逼近性能和分割效果更好。%Aiming at those shortcomings of previous multi-threshold image segmentation algorithm such as large com-plexity and instability caused by the image histogram glitch interference, a new multi-threshold image segmentation algo-rithm was proposed using Bernstein polynomial to uniformly approximate histogram curve. First, according to the ap-proximation theory of Weierstrass to construct Bernstein polynomial for the histogram curve, then more difficult peak value calculating of the histogram was reduced to the Bernstein polynomial extremal generating, that was exported easily by the first and second derivative of Bernstein polynomial function, and finally obtain the actual peak value of the image histogram by picking up these extremes and polar values and filtering through classification algorithm, and finish multi-threshold image segmentation. Experimental results show that the algorithm is insensitive for histogram glitch in-terference, the overall is stable, the redundant computation and time complexity are smaller, with less time and high effi-ciency, the approximate performance and segmentation effect are better.
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孙富春;
罗敏楠
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摘要:
The uniform approximation and interpretability of fuzzy system make it possible to describe complex nonlinear uncertain systems intuitively and efficiently.However, fuzzy modeling approach of complex systems faces the challenge of"rule explosion".In this paper, we firstly reviewed the uniform approximations of fuzzy systems and the sufficient and necessary conditions of approximation property of fuzzy systems.On this basis, we summarizes identification approaches of fuzzy systems based on data driven, and focus onsparse representationin the application of fuzzy system identification.%模糊系统的一致逼近能力和可解释性能使得其能够直观高效地描述复杂的非线性不确定系统. 然而,复杂系统的模糊建模方法面临"规则爆炸"的挑战. 该文首先回顾了模糊系统一致逼近性以及模糊系统逼近的充分条件和必要条件. 在此基础上,综述了基于数据驱动的模糊系统辨识方法,并重点介绍了流行的稀疏表达思想在模糊系统辨识领域中的应用.
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涂天亮
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摘要:
D是复平面上Jordan闭曲线Γ围成的单连区域.自20世纪40年代以来,在闭域D上用Hermite插值多项式一致逼近和平均逼近f(z)∈A(q)(D),已经有很多研究而且还在继续研究.大量作者接连不断地减少区域边界条件以期提高论文的水平.什么是最少的边界条件?直到现在,这个问题似乎还没有解决.本文已经发现并证明了:为了Hermite插值多项式收敛于f(z)∈A(q)(D),其充分必要条件是Γ∈ C,即设这区域边界曲线Γ的参数表示是z=z(t),它具有一阶导数z'(t)连续且不等于零于[0,2π]上.
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涂天亮
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摘要:
D是复平面上Jordan闭曲线Γ围成的单连区域.自20世纪40年代以来,在闭域-D上用Hermite插值多项式一致逼近和平均逼近f(z)∈A(q)(-D),已经有很多研究而且还在继续研究.大量作者接连不断地减少区域边界条件以期提高论文的水平.什么是最少的边界条件?直到现在,这个问题似乎还没有解决.本文已经发现并证明了:为了Hermite插值多项式收敛于f(z)∈A(q)(-D),其充分必要条件是Γ∈~C,即设这区域边界曲线Γ的参数表示是z=z(t),它具有一阶导数z'(t)连续且不等于零于[0,2π]上.
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庄方敏;
黄若婷;
陈满春
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摘要:
Piecewise linear continuous function is a kind of continuous function which has a broad appli-cation. This paper firstly shows that any continuous function can be used uniformly approximated and uniform-ly convergent by piecewise linear continuous functions. Secondly, we can get an approximate value of a fixed point of a continuous map by seeking a fixed point of a corresponding piecewise linear continuous function. Moreover, we use the matlab program to output all fixed points of piecewise linear continuous functions on the computer. Finally,we give an application of the above conclusions in the economics.%分段线性连续函数是一类有着广泛应用的连续函数。本文首先证明:对任意的连续函数可用分段线性连续函数去一致逼近和一致收敛。其次,证明可把通过求分段线性连续函数的不动点来得到相应连续函数不动点的近似值。利用matlab程序,实现了在计算机上输出分段线性连续函数的所有不动点。最后,给出以上结论在经济学中的一个应用。
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涂天亮;
莫烔
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摘要:
The results of accurate order of uniform approximation and simultaneous approximation in the early work "Jackson Type Theorems on Complex Curves" are improved from Fej'er points to disturbed Fej'er points in this article.Furthermore,the stability of convergence of Tn,ε(f,z) with disturbed sample values f(zk*)+εk are also proved in this article.