In this paper we investigate the characterization of self-adjoint domains of symmetric differential operators with interior singular points in the direct sum spaces.
本文研究了具有内部奇异点的，即直和空间上的对称微分算子自共轭域的辛几何刻划问题。
参考来源 - 直和空间上对称微分算子自共轭域的辛几何刻划Chapter 2 explores the techniques to extract contours from medical images. A method based on differential operators is presented for treating sophisticated contours.
我们提出了一种新方法，它利用边界微分算子来尽量在自动分类过程中保留图像特征，还讨论了轮廓线的定向提取技术。
参考来源 - 基于医学图像的曲面重构的基础算法研究·2,447,543篇论文数据，部分数据来源于NoteExpress
In this paper, the classifications of boundary conditions of the self-adjoint differential operators and its canonical form are studied.
本文主要研究自共轭微分算子边界条件的分类及其标准型。
For the sake of predicting the detection effect of differential operators, the frequency features of common operators are analyzed from the view point of frequency domain.
为了预测微分算子边缘提取能达到的效果，从频域角度出发，分析了边缘检测中常用微分算子的频谱特性。
This paper provides several linear isomorphism theorems for certain nonsymmetric differential operators of sixth order under proper topologies about some complex parameters.
给出了某类六阶非对称微分算子在一些合适拓扑下关于复参数的几个线性同构定理。
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