The PHD thesis is to study the super-memory gradient methods for optimization problems.
本文研究非线性最优化中的超记忆梯度算法。
In Chapter 3, some error bounds estimations of the projected gradient methods are obtained.
第三章研究了投影梯度方法的误差界估计。
Conjugate gradient methods are important iterative methods for solving optimization problems.
共轭梯度法是求解最优化问题的一类有效算法。
This paper gives the global convergence of a class of conjugate gradient methods with relaxed line search.
在推广线搜索下给出了一类共轭梯度法的全局收敛结果。
Using the error bounds, we give a condition for convergence of the sequence of iterates generated by projected gradient methods.
最后，通过这些误差界，我们给出了由投影梯度方法产生的迭代序列收敛的条件。
The performance of segmentation methods based on watershed depends largely on the gradient of the image.
流域分割方法的性能主要依赖于图像梯度。
Methods: (1)To separate stilbene glycoside by using silica gel column chromatography with gradient elution consisting of ethyl acetate and petroleum ether.
方法：（1）以硅胶柱色谱法，乙酸乙酯-石油醚梯度洗脱，自何首乌中提取分离二苯乙烯苷单体成分。
Methods the pig skin was treated with negative pressure by a self-made device to remove the blistered epidermis, then dermal cells were removed by ion detergent with osmotic pressure gradient effects.
方法：利用自制的装置，先将猪皮经负压处理，去除起泡后的表皮，然后利用离子型去污剂的渗透压梯度作用去除真皮内的细胞成分。
METHODS the gradient experiments of single factor and multilevel orthogonal design were integrated and the results of the two experiments were analyzed.
方法采用单因素多水平的梯度实验和正交设计实验相结合，对两种不同实验方法所得结果进行分析。
Of the existing phase compensation methods, the phase gradient autofocus (PGA) algorithm is a better one.
在现有的相位补偿方法中，相位梯度自聚焦（PGA）算法是较好的一种。
This paper systematically introduces some methods of micro-forming and a universal theory about strain gradient plasticity at present.
本文系统地介绍了微细塑性成形方法以及目前较常用的应变梯度塑性理论。
Salix scrub pasture in Maowusu desert as a case was studied. With the vegetation classification, ordination and gradient analysis, the theory and methods for desertification assessment were discussed.
本文以毛乌素沙区柳湾灌丛草场荒漠化为例，应用植被分类、排序和梯度分析等技术，探讨荒漠化评价的理论和方法。
Concept, performances, applications and preparation methods of functionally gradient material are stated.
论述了功能梯度镀层的概念、性能、应用及制备方法。
Materials and Methods: WHVP and hepatic venous pressure gradient (HVPG) were measured in 22 patients with the cirrhotic portal hypertension.
材料与方法：对22例临床确诊的肝硬化门脉高压患者行WHVP测定，测量WHVP及肝静脉压力梯度(HVPG)。
Methods the strains were isolated using gradient dilution and streak plate techniques and the activity was determined by Oxford cup method and paper disk method.
方法梯度稀释与划线法分离菌株，并利用牛津杯法和纸片法测定其抗菌活性。
The concept and the primary preparation methods of functional gradient materials are described.
阐述了功能梯度材料的概念和主要制备方法。
The concept, design methods, fabricating techniques, property evaluation and applications of functionally gradient materials (FGM) are described systematically in the present paper.
系统地论述了功能梯度材料的概念、设计方法、制备工艺、性能评价及其应用领域。
The conjugate gradient method is one of the most efficient methods for solving unconstrained optimization problems.
共轭梯度法是求解无约束优化问题的一类有效方法。
The types, preparation methods and applications of functionally gradient polymer materials are reviewed, and research progress of gradient polymer materials are illustrated.
本文从高分子功能梯度材料的类型、制备方法和应用等方面，综述了高分子功能梯度材料近年来的研究进展。
Methods of preparing functionally gradient materials were also summarized.
总结了功能梯度材料的各种制备方法。
Recently, gradient polymer materials have attracted more attentions. The types, preparation methods, characterization ways, and applications of gradient polymer materials are reviewed.
介绍了高分子梯度材料的类型和制备方法，并详细总结了近年来高分子梯度材料表征方法的研究进展和应用现状。
Recently, methods basing on histogram of orientation gradient are proved to be good for human detection.
在人体检测技术当中，梯度方向直方图是近年来被证明比较好的一种方法。
Pr conjugate gradient method is one of the efficient methods for solving large scale unconstrained optimization problems, however, its global convergence has not been solved for a long time.
PR共轭梯度法是求解大型无约束优化问题的有效算法之一，但是算法的全局收敛性在理论上一直没有得到解决。
With the two methods the homogenous green bodies without density gradient and high density sintered ceramic bodies can be gained.
利用这两种成型技术可以获得均匀、无密度梯度的近净尺寸坯体和致密陶瓷制品。
Two smoothed gradient estimate methods used in adaptive sign algorithm applied to adaptive echo canceling have been discussed in this paper.
以自适应回波对消为对象，讨论了两种自适应符号算法的梯度估计平滑方法。
Secondly, for the image edge detection, methods including the gradient method, the sharp-processing method, and the Hough transformation were used, and the contour tracing was also conducted.
边缘检测处理部分采用了梯度处理法、锐化处理法、哈夫变换处理法，并对图像作轮廓跟踪处理。
And sensitivity of the bacterium to antibiotics was measured by using gradient AGAR diffusion of K-B methods.
细菌对抗生素的敏感性用k - B法和梯度琼脂平板法测定。
Methods: MSC were aspirated from rabbit iliac and tibias crest and purified by gradient centrifuge and adhesive culture methods.
方法：抽取兔髂骨及胫骨的骨髓液，采用密度梯度离心法结合贴壁培养法分离纯化出MSC，并增殖。
Methods: MSC were aspirated from rabbit iliac and tibias crest and purified by gradient centrifuge and adhesive culture methods.
方法：抽取兔髂骨及胫骨的骨髓液，采用密度梯度离心法结合贴壁培养法分离纯化出MSC，并增殖。
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