梯度法

Gradient sharpening and Laplacian sharpening are applied to the sharpening. It is obtained from the experimental result that Laplacian sharpening is more valid in image sharpening for infrared image of warship targets in sky-sea background that is smoothened.

采取了梯度锐化和拉普拉斯锐化的方法进行锐化处理，从实验结果得出：对海天背景下平滑后的舰船目标红外图像进行锐化处理时，选用拉普拉斯锐化法比较有效。

The gradient PPS/FEP composite anti-corrosive coatings were prepared on carbon steel. The bonding strength of all coating systems was determined by the pull-off test.

在碳钢表面制备了具有梯度结构的PPS/FEP复合防腐蚀涂层，采用拉开法测定了各涂层体系的结合强度。

Flow-field simulation shows that radial pressure gradient goes down fast and air flowrate is nearly directly proportional to the well vacuum and the soil permeability coefficient. It also indicates that stop-off coating will play an important role in SVE.

采用Galerkin三角形有限单元法对复合地表边界的竖井土壤气相抽提稳态流动问题进行了数值模拟分析，模拟结果显示：气相压力沿径向梯度迅速下降，抽提流量与土壤通透系数及真空度呈现高度相关的正比例关系，且地表隔绝覆盖层对流场影响很大。

First an advanced snake model based on the gradient vector field was used to segment the contour of the left ventricular and an initial snake line of the contour was got, then optical flow method was used to track the contour of the LV in the successive images. Finally, the Simpson method was applied to calculate the volume of the LV.

首先采用基于梯度向量流的主动轮廓模型对左心室内膜进行分割获取初始轮廓线，再采用光流法跟踪得到心脏序列中后续帧图像的心腔内膜轮廓线，最后采用Simpson方法计算得到左心室容积。

Methods Mitochondria were isolated from rat cerebral cortex and purified with a homogenizing and centrifuging program.

组织匀浆梯度离心法分离并纯化大鼠脑皮质线粒体，氧电极法鉴定线粒体氧化呼吸及其偶联活性；体外无细胞线粒体3H UTP和3H Leucine掺入法分别测定细胞器的转录与翻译活性。

Human UBCMSCs can be isolated from human cord blood by using density gradient centrifuging and directly adhering. The method is used to preparation large quantity of human MSCs.

密度梯度离心结合直接贴壁法可在体外分离培养UBCMSCs，可望用于大量制备人源性MSCs。

In the traditional neural networks based on gradient decline, nonlinear object functions with multiple extrema are easy to get stuck in the problem of local optimization solution. Therefore, a new method of chaos optimization neural network with weight learning is introduced in this paper.

针对传统的基于梯度下降法BP神经网络中存在非线性多极值目标函数易陷于局部最优解的问题，提出了一种权值学习混沌优化的神经网络方法。

In this article, optical and electronic properties of ZnO doped by Al are studied based on DPT theory. Correlation energy of electron exchange is combined with GGA in the form of PW91. The elements doped by replacement and inside of ZnO are calculated. The lattice and electronic structure properties of these models are calculated and compared with the experiments and previous theoretical works.

采用基于密度泛函理论的总体能量平面波超软赝势法，电子交换关联能结合广义梯度近似PW9l形式，对Al原子不同掺杂位置的ZnO超原胞进行了几何优化，计算分析了晶体结构参数及掺杂模型的电子结构。

Methods TIL in the patients with PHC were separated with combinative enzymatic digestion of type Ⅰ,Ⅳ collagenases,type Ⅴ hyaluronidase and type Ⅰ deoxyribonuclease followed by discontinuous density gradients.Cytotoxicity of TIL to liver cancer cells was detected with MTT method.

采用Ⅰ型和Ⅳ型胶原酶、Ⅴ型透明质酸酶和Ⅰ型DNA酶四联酶消化，应用不连续密度梯度离心分离TIL，采用MTT比色法检测TIL对自体癌细胞及肝癌细胞株的细胞毒。

Besides FPS, the proposed GCA approach can also be used to solve a class of network communication problems.

通常的梯度下降法等数学规划方法，本质上是串行的优化方法，不能满足

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。