基于特征断面的复杂巷道段三维建模

为解决巷道断面随工程需要及岩层变化不断改变,导致巷道三维建模程序复杂的问题,提出基于特征断面的巷道三维建模思想,通过建立巷道特征断面模型库,实现变化巷道段的三维建模,以期提高复杂巷道段的建模效率。首先阐述建模数据的采集方法,并对巷道断面进行了细化坐标分析;同时提出拐角处断面变化巷道段的平滑处理算法（通过圆弧来圆滑拐角处巷道中心线）,对普通巷道段采用三角剖分形成三角网完成巷道段的建模;而巷道断面发生变化的复杂巷道段存在简单曲面四边形,采用Bézier曲面及曲面的拼接完成巷道段的建模,并在实验中进行了验证     

GPS定位误差分析和建模

提出一种GPS定位误差序列建模的新方法。该方法首先利用多点平均方法提取误差序列的趋势项;然后利用样本周期图拟合周期项;最后对去掉趋势项和周期项的平稳随机序列进行分析,从而得到了GPS定位误差序列的组合预测模型。组合模型融合了各种基本建模方法的特色与优势,弥补了单个基本模型的缺陷与不足,有效提高了定位误差序列的预测准确度。利用实测数据,验证了方法的可行性与有效性。     

The Skeptical Explorer: A Multiple-Hypothesis Approach to Visual Modeling and Exploration

The primary intent of this work is to present a method for sequentially associating three-dimensional surface measurements acquired by an autonomous exploration agent with models that describe those surfaces. Traditional multiple-viewpoint registration approaches are concerned only with finding the transformation that maps data points to a chosen global frame. Given a parts-based object representation, and assuming that the view correspondence can be found, the problem of associating the registered data with the correct part models still needs to be solved. While traditional approaches are content to group segmented data sets that geometrically overlap one another with the same part, there are cases where this causes ambiguous situations. This paper addresses the model-data association problem as it applies to three-dimensional dynamic object modeling. By tracking the state of part models across subsequent views, we wish to identify possible events that explain model-data association ambiguities and represent them in a Bayesian framework. The model-data association problem is therefore relaxed to allow multiple interpretations of the object's structure, each being assigned a probability. Rather than making a decision at every iteration about an ambiguous mapping, we look to the future for the information needed to disambiguate it. Experimental results are presented to illustrate the effectiveness of the approach.     

Comparing alternative classifiers for database marketing: The case of imbalanced datasets

There are various algorithms used for binary classification where the cases are classified into one of two non-overlapping classes. The area under the receiver operating characteristic (ROC) curve is the most widely used metric to evaluate the performance of alternative binary classifiers. In this study, for the application domains where the high degree of imbalance is the main characteristic and the identification of the minority class is more important, we show that hit rate based measures are more correct to assess model performances and that they should be measured on out of time samples. We also try to identify the optimum composition of the training set. Logistic regression, neural network and CHAID algorithms are implemented for a real marketing problem of a bank and the performances are compared.     

基于Web的工作流表单的柔性建模

针对基于Web的工作流管理系统中表单建模存在的数据结构不合理、维护困难、效率低、缺乏数据柔性和结构柔性等问题,分析了表单数据特点及传统表单建模方法的缺陷,提出一种基于XML和关系数据库的表单柔性建模方法,给出基于表单的流程推动模型及实现方法,引入了数据集控件和自定义函数控件,增强了系统的可扩展性和柔性,满足了工作流管理系统中对表单定义处理灵活性的要求.     

万维网基于本体云模型的信息建模方法

信息建模常用来表达知识,万维网分布式环境下,知识存在不确定性、不协调性、时变性和非恒常性,同时也有一定的群体性、规律性。为了更好的体现知识的性质,文章提出了一种基于本体云模型的信息建模方法。该方法使用本体云模型,并将本体云模型跟隶属云相结合,将隶属云作为概念的原子模型,本体云作为知识结构的原子模型,两者结合提供了从概念到领域知识一致的表达,通过该方法可以很好地进行万维网的信息建模。     

基于支路追加法的配电网混联线路电力线载波通信信道建模

提出了一种基于支路追加法的中压配电网混联线路的电力线载波通信信道建模方法。根据配电网拓扑结构,利用支路追加法,逐一追加网络各条支路,列写该支路的伏安特性独立方程和基尔霍夫定律电流方程,生成一组具有唯一解的网络矩阵方程。通过该矩阵方程中各未知变量的比值关系,求解信号的传输函数,分析信道的传输特性。当配电网网络结构发生改变时,只需在原代数矩阵方程基础上,增减矩阵中的相关行与列即可得修改后的新矩阵方程。该建模方法原理清晰,运算量小,适用于树形网络、手拉手网络及环网等各种拓扑结构。仿真及实验测试验证了所提方法的正确性。     

开关电源高频变压器电容效应建模与分析

该文分析了开关电源中高频变压器在考虑了变压器绕组导体的电位分布情况下的电场储能特性和共模电磁干扰发射特性。指出采用一端口入端电容描述电场储能效应，而采用二端口转移阻抗电容描述共模电磁干扰发射效应，并提出了相应的参数计算方法。在此基础上，建立了新的高频变压器电容效应模型，该模型可以同时兼顾变压器的电场能量储存特性和共模噪音抑制特性，能合理地揭示变压器内共模噪音电流的流动机理。实验和仿真结果均验证了理论分析和模型。     

用户移动性建模及其应用

在移动通信中，移动性建模技术可以广泛用于移动性管理、无线资源管理、移动切换、话务分析等不同方面。文中首先提出移动性建模的基本假设，并建立一般的移动性模型；在此基础上，详细介绍几类不同的移动性模型，并给出移动性建模的具体应用。     

Synthesis and Anti-Cancer Activity of New Pyrazolinyl-Indole Derivatives: Pharmacophoric Interactions and Docking Studies for Identifying New EGFR Inhibitors

Newly designed series of indole-containing pyrazole analogs, pyrazolinylindoles, were synthesized, and their structures were confirmed based on the spectral data of the ¹H NMR, ¹³C NMR, and HR-MS analyses. Preliminary anti-cancer activity testings were carried out by the National Cancer Institute, United States of America (NCI, USA). Compounds HD02, HD05, and HD12 demonstrated remarkable cytotoxic activities against nine categories of cancer types based cell line panels which included leukemia, colon, breast, melanoma, lungs, renal, prostate, CNS, and ovarian cancer cell lines. The highest cytotoxic effects were exhibited by the compounds HD02 [1-(5-(1-H-indol-3-yl)-3-(p-tolyl)-4,5-dihydro-1H-pyrazol-1-yl)-2-phenylethanone], HD05 [1-(3-(4-chlorophenyl)-5-(1H-indol-3-yl)-4,5-dihydro-1H-pyrazol-1-yl)-2-phenoxyethanone], and HD12 [(3-(4-chlorophenyl)-5-(1H-indol-3-yl)-4,5-dihydro-1H-pyrazol-1-yl)(pyridin-4-yl)methanone] against some of the 56 types of NCI-based cell lines in different panels. Compound HD05 showed the maximum range of cancer cell growth inhibitions against all categories of the cell lines in all nine panels. On average, in comparison to the referral standard, imatinib, at a dose level of 10 µM, the HD05 showed significant activity against leukemia in the range of 78.76%, as compared to the imatinib at 9% of cancer cells’ growth inhibitions. Molecular docking simulation studies were performed in silico on the epidermal growth factor receptor (EGFR) tyrosine kinase, in order to validate the activity.