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Some kinds of data analysis and statistics methods, including principle factor analysis, factor loading analysis and dicrimination function, ternary diagram, scatter diagram are used to determine the material source of one piston core DGKS 9617 recovered from the northern part of the East China Sea and one bore core EA01 from the northeast part of the East China Sea.

中文摘要:采用数理统计(包括主成分分析、因子得分分析和判别函数),微量元素比值三角图和二维散点图,运用综合分析判别的方法判断东海北部柱样DGKS9617和东海东北部钻孔EA01物质来源。

The backward heuristic search algorithm BHAO for general AND/OR graphs is presented, in terms of newly-defined heuristic function h and the principle that every subtree of the optimum solution tree is also optimum solution one.

根据新定义的启发式函数h以及广义AND/OR图的最佳解树之所有子树亦是最佳子解树的原理,提出了广义AND/OR图的自底向上的启发式搜索算法BHAO。

To realize the realistic rendering of the scene in applying environment mapping to VR systems, an approach to fast calculating diffuse environment maps was proposed starting from the analysis of spherical harmonics.

为了把环境贴图应用于VR系统中,实现场景对象的真实感绘制,首先从分析球面调和函数入手,提出了漫反射环境纹理图的快速计算方法。

The relationship between relative yield and relative water use is formulated,based on these data, a optimal irrigation scheduling under sprinkling irrigation condition can be made or the lower level of soil moisture in different growing stage might be teken as the indicator for the scheduling irrifgation in winter wheat.

喷灌条件下土壤水分、硝态氮空间变异特征研究:应用地统计学理论,以半方差函数为工具分析不同灌溉制度下,土壤含水率(0~60cm)和土壤中硝态氮在相应深度的空间分布,用各类模型拟合半方差图,在此基础上应用普通克立格技术估算未知点的土壤含水率,使用最优内插值法绘制土壤含水率和硝态氮在田间的空间分布等值线图。

Let G = GV(G,E,Ψ_G be a graph, where V ≠φ and E denote the vertexset and edge set of G,Ψ_G is an incidence function that associates each edge of Gwith an unordered pair of vertices of G.

对于一个图G=GV(G,E,ψ_G,我们用V≠φ和E表示图的顶点集合和边集合,ψ_G是联系着G中的边和一对无序顶点之间的关联函数。

A matching graph of class-buck and class-stack is obtained by a simplifying rule to guarantee the correctness of curriculum schedule. Employing the matching graph as the initial solution, Tabu search is introduced, the index of which is the weighted summation of the principle of categoricalness, rationality, and humanization.

在此基础上,引入禁忌搜索算法,以排课的完备性原则、合理性原则和人性化原则的加权和为目标函数,以随机二维权值矩阵生成的匹配偶图为初始解,对二维权值矩阵进行扰动构成搜索邻域,以生成的匹配偶图为禁忌对象,采用全局藐视准则,获得最优的排课方案。

In this paper, the main features of endoscopic image are analyzed and homomorphic systems based on the illumination-reflectance model are briefly presented. Then, principles and realization of the model are introduced and expression of the filter function of homomorphic systems is addressed.

本文首先分析医用电子内窥镜图象的主要特点,提出基于照明反射模型的同态滤波方法,接着在简要介绍模型的原理、实现过程和特点的基础上,给出了适用的滤波函数模型和表达式;最后,将处理结果和其它图象增强方法相对比。

Some methods, in which synthesized theoretical seismogram of high frequency is taken as record signal and 20%random noise is superimposed on the seismogram, are used to analyze the theoretical seismogram. The digital experiment shows that in the correlating frequency range, Green's function method can measure precisely interstation phase velocity, but the results obtained by correlation and narrow band-pass filtering correlation methods are more dispersed.

以合成的高频理论地震图作为记录信号,并在理论地震图上叠加了20%的随机噪声,利用这些方法分析理论信号,数字实验表明:在相干频率范围内,格林函数方法能够精确测量台间相速度,而互相关法和窄带通滤波互相关法所得结果较为离散。

Results In static phantom studies, the percent error of mean activity obtained by Carson's method was reduced to about 9 %, and it is less than that of image-derived method using maximum likelihood expectation maximization (about 14 %). In simulated dynamic phantom studies, the vessel component could be extracted using ICA in image and sinogram domain. In sinogram domain, the six components extracted by ICA could be obtained quickly.

在静态物理假体实验结果来看,使用Carson's method计算出感兴趣区域活性的百分比误差( 9%)比直接从影像取得活性的百分比误差( 14%)来得小;从数位模拟动态假体实验结果来看,独立成份分析法运用在影像空间或是弦波图空间上,都可以将血管分离出来,但从弦波图空间上得到各个独立成份相对於影像空间就快得多;imageICA和sinogramICA计算出的输入函数的标准化均方根误差分别是0.57和0.28。

The essential problem of KBOOA are acquirement and organization of knowledge about the application domain. First of all, we recognize objects according to their outside characteristics and build stable concepts structures. In this way, the attributes and behaviors of any objects are treated as objects as well. The concepts are organized in hierarchies, the concepts' semantics are demostrated in the form of conceptual graphs. As hierarchy structure has inheritance, the system has ability to recognize and reuse concepts, analyze and reason the acquired information according to the existing knowledge, understand the problem space and present the system's functions and characteristics to the analysts and users in the form of scenarios. The main means of transforming informal requirements to formal ones is to recognize objects according to their outside characteristics, recognize attributes according to their functional dependence and describe the semantics of objects, behavior and attribute's relationship's because there is a automatic map from the descriptions of attributes and behaviors to class structures. It is difficult to transfer from OOA to OOD, We disscussed the modularity of Object-Oriented programs according to the principles of software engineering and presented the methods to decrease couplings and increase cohesions, i.

KBOOA以知识的获取、组织为中心问题,首先依据对象的外特性识别对象,并将属性和行为也作为对象处理,从而建立起较稳定的概念结构;KBOOA以层次的方法组织概念,以概念图的形式描述概念的语义,利用层次结构的继承特性,使系统具有识别、重用概念的能力,根据已有知识对系统所获信息进行分析、推理,产生对问题空间的理解,并以想定的形式向分析师、用户展示系统功能、性能,从而构成了一个交互式的,具有一定智能的需求分析环境;依据外特性识别对象,依据函数依赖关系识别属性,用概念图描述对象、行为及属性关联,是将需求由非形式化形式向形式化形式转换的主要手段,使属性及行为描述可向类型结构自动映射,为提高需求分析的自动化程度提供了依据。

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