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国家自然科学基金(11171191)

作品数:11 被引量:10H指数:2
相关作者:乔小燕姬光荣韩玉良孙喜东刘柏枫更多>>
相关机构:山东工商学院中国海洋大学更多>>
发文基金:国家自然科学基金山东省自然科学基金中国博士后科学基金更多>>
相关领域:理学自动化与计算机技术建筑科学更多>>

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11 条 记 录,以下是 1-10
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Square-mean Almost Periodic Solutions to Some Stochastic Evolution Equations被引量:1
2014年
This paper concerns the square-mean almost periodic mild solutions to a class of abstract nonautonomous functional integro-differential stochastic evolution equations in a real separable Hilbert space. By using the so-called "Acquistapace–Terreni" conditions and the Banach fixed point theorem, we establish the existence, uniqueness and the asymptotical stability of square-mean almost periodic solutions to such nonautonomous stochastic differential equations. As an application, almost periodic solution to a concrete nonautonomous stochastic integro-differential equation is considered to illustrate the applicability of our abstract results.
Xi Liang LI
基于特征灰度和分水岭变换的甲藻横沟区域分割被引量:1
2012年
针对分水岭变换存在的过分割问题,提出了一种新的图像分割方法。该方法利用灰度包容球获取图像特征灰度集合,通过降低图像中灰度级数目减少无意义的局部极小值区域,对灰度重构后的梯度图像极小值区域采用自动阈值法进行标记并对标记加以质心、形状和面积约束,对修改后的梯度图像采用分水岭变换实现甲藻显微图像中横沟区域的分割。实验证明,该方法可比传统方法更合理地分割出横沟区域,有效抑制了过分割现象。
乔小燕
关键词:赤潮藻显微图像分割
Square-mean Almost Automorphic Solutions to Some Stochastic Evolution Equations I: Autonomous Case被引量:5
2015年
This paper concerns the square-mean almost automorphic solutions to a class of abstract semilinear functional integro-differential stochastic evolution equations in real separable Hilbert spaces. Under some suitable assumptions, the existence, uniqueness and asymptotic stability of the square-mean almost automorphic mild solution to some stochastic differential equations are established. As an application, we analyze the almost automorphic mild solution to some stochastic partial functional differential equation which turns out to be in good agreement with our abstract results.
Xi-liang LIYu-liang HANBai-feng LIU
ON SQUARE-MEAN ALMOST AUTOMORPHIC MILD SOLUTIONS TO SOME STOCHASTIC DELAY EQUATIONS I:EXISTENCE AND UNIQUENESS
2012年
In this paper,we aim to study the existence and uniqueness of square-mean almost automorphic mild solution to a stochastic delay equation under some suitable assumptions imposed on its coefficients.As an application,almost automorphic mild solutions to a class of stochastic partial functional differential equations are analyzed,which shows the feasibility of our results.
Xiliang Li 1,2,Yuliang Han 2 1.Math.and Science College,Shanghai Normal University,Shanghai 200235
ASYMPTOTICALLY MEAN ALMOST PERIODIC SOLUTIONS TO RANDOM DIFFERENCE EQUATIONS
2012年
In this paper,we first investigate some basic properties of asymptotically mean almost periodic random sequences on Z + and then show some properties of asymptotically mean almost periodic solutions to random difference equations.
Xidong Sun,Baifeng Liu,Yuliang Han(College of Math.and Information Sciences,Shandong Institute of Business and Technology,Yantai 264005,Shandong)
ALMOST AUTOMORPHIC MILD SOLUTIONS TO SOME FRACTIONAL DELAY DIFFERENTIAL EQUATIONS被引量:2
2012年
In this paper,a new and general existence and uniqueness theorem of almost automorphic mild solutions is obtained for some fractional delay differential equations,using sectorial operators and the Banach contraction principle.
Xiliang Li 1,Fenglong Qu 2,Yuliang Han 1(1.College of Math.and Information Sciences,Shandong Institute of Business and Technology,Yantai 264005,Shandong
INVARIANT ALGEBRAIC SURFACES OF SOME DYNAMICAL SYSTEM
2013年
In this paper, we study the invariant algebraic surfaces of a system, which generalizes the Lorenz system. Using the weight homogeneous polynomials and the method of characteristic curves for solving linear partial differential equations, we characterize all the Darboux invariants, the irreducible Darboux polynomials, the rational first integrals and the algebraic integrability of this system.
Tinghua L
一类随机积分-微分方程的均方概周期解
2013年
利用概周期函数和指数型二分性的性质、Ito等距公式及Banach不动点定理,给出了随机积分-微分方程dx=[A(t)x(t)+F1(t,x(t))]dt+sum from j=1 to m∫t-∞C(t-u)Gj(u,x(u))dW(u)+∫t-∞B(t-u)F2(us(u))du均方概周期解的存在唯一性定理.
刘柏枫韩玉良孙喜东
关键词:指数型二分性
ASYMPTOTICALLY ALMOST PERIODIC FUNCTIONS IN PROBABILITY
2013年
In this paper, we first study the properties of asymptotically almost periodic functions in probability and then prove the existence of almost periodic solutions in probability to some differential equations with random terms.
Yuliang HanBaifeng LiuXidong SunXiliang Li
一种甲藻显微图像顶刺区域分割及特征提取方法被引量:1
2012年
为了提高藻种显微图像识别率,提出了一种基于自适应形态学的快速藻种顶刺分割和特征提取方法。该方法引入像素宽度的概念,以藻种目标像素宽度直方图和面积分布图为判别依据,自动判定最佳结构元尺寸,以联合滤波、区域归并等形态学操作分割顶刺区域;最后构造了两类局部生物形态学特征提取参数。实验证明,该算法针对不同甲藻细胞目标可自动计算最佳结构元素大小,具有精度高、速度快的优点,且两类特征提取参数具有视觉不变性。
乔小燕姬光荣
关键词:甲藻
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