基于句法分析与依存分析的评价对象抽取

随着互联网的不断普及,针对各种产品的评论也不断增多,这些评论中所包含的丰富信息,对制造商和消费者都极具分析价值.只有正确分析评价对象,意见挖掘的结果才会准确可信.在总结前人成果的基础上,针对网络上的客户评论,提出了一种新的评价对象抽取方法.该方法是基于ICTParser的句法分析与IR的依存关系分析的联合,采用似然值检...     

面向电子政务的全国典型地物波谱数据服务平台设计与实现

地物波谱是遥感重要的信息源之一,通过数据库建设管理波谱数据已越来越得到重视。自然资源和地理空间基础信息库是国家电子政务4个基础信息库之一,其主要目的是实现部门间的数据共享与交换,其下设有全国典型地物波谱数据库。为应对电子政务的需求,在原有波谱数据库的工作基础上,构建了面向电子政务的全国典型地物波谱数据服务平台,用以向电子政务提供符合要求的数据以支持电子政务数据共享及政务决策。介绍了波谱数据服务平台的设计及关键技术研究,并展示了实现后的波谱数据服务平台。     

基于SNMP的MIB库转化成C文件的实现

网络管理日益重要,SNMP以其简单、灵活的特点而得到广泛应用。MIB库是网络管理中的资源以及属性的集合,是网管的核心,要访问MIB库,必须将其转换成C语言。MIB库转换成C文件,先要按照一定的语法格式编写MIB文件,将新编写的MIB文件放入MIB库中,然后根据是转换简单变量还是表变量使用NET-SNMP源码包自带的模板转换。经实验证明,这种方法能够简单快速地将MIB文件转换成C文件,并且转换后的C文件代码格式统一,经过少量的修改,就可以重新编译到SNMP源码包中使用。     

基于凸型模板的目标形态图像识别算法

针对视频图像中目标形态的检测识别问题,提出了一种基于凸型模板修正算法对条形目标的检测、识别和定位技术。通过分析凸型模板识别条形目标的基本原理,提出引入倾斜角度因子的凸型模板改进算法,提高了条形目标识别的准确度,并以单人个体作为研究对象进行实验,结果表明这种方法运算复杂度低,对条形目标的识别率高,跟踪特性良好。     

Surface Patches from Unorganized Space Curves

Recent 3D sketch tools produce networks of three‐space curves that suggest the contours of shapes. The shapes may be non‐manifold, closed three‐dimensional, open two‐dimensional, or mixed. We describe a system that automatically generates intuitively appealing piecewise‐smooth surfaces from such a curve network, and an intelligent user interface for modifying the automatically chosen surface patches. Both the automatic and the semi‐automatic parts of the system use a linear algebra representation of the set of surface patches to track the topology. On complicated inputs from ILoveSketch [ [BBS08] ], our system allows the user to build the desired surface with just a few mouse‐clicks.     

一种基于基元反应原理的沉降预测模型

现有沉降预测方法受其理论制约或简化性假设条件的影响,预测结果常不甚理想。通过分析沉降过程发展的特征,提出了一种基于基元反应原理的的沉降预测模型。将之用于某矿区工程沉降分析,取得理想效果,证明该模型有进一步推广应用的价值。     

G2 Tensor Product Splines over Extraordinary Vertices

We present a second order smooth filling of an n‐valent Catmull‐Clark spline ring with n biseptic patches. While an underdetermined biseptic solution to this problem has appeared previously, we make several advances in this paper. Most notably, we cast the problem as a constrained minimization and introduce a novel quadratic energy functional whose absolute minimum of zero is achieved for bicubic polynomials. This means that for the regular 4‐valent case, we reproduce the bicubic B‐splines. In other cases, the resulting surfaces are aesthetically well behaved. We extend our constrained minimization framework to handle the case of input mesh with boundary.     

Segmenting and tracking multiple objects under occlusion using multi-label graph cut

This paper proposes a new method to segment and track multiple objects through occlusion by integrating spatial-color Gaussian mixture model (SCGMM) into an energy minimization framework. When occlusion does not occur, a SCGMM is learned for each object. When the objects are subject to occlusion, energy minimization is used to segment the objects from occlusion. To make the learned SCGMMs suitable for the segmentation of the current occlusion, a displacing procedure is utilized to adapt the SCGMMs to the spatial variations. A multi-label energy function is formulated building on the displaced SCGMMs and then minimized using the multi-label graph cut algorithm, thus leading to both the segmentation and tracking results of the objects with occlusion. Experimental validation of the proposed method is performed and presented on several video sequences.     

Extraction of Video Objects via Surface Optimization and Voronoi Order

We implement a video object segmentation system that integrates the novel concept of Voronoi Order with existing surface optimization techniques to support the MPEG-4 functionality of object-addressable video content in the form of video objects. The major enabling technology for the MPEG-4 standard are systems that compute video object segmentation, i.e., the extraction of video objects from a given video sequence. Our surface optimization formulation describes the video object segmentation problem in the form of an energy function that integrates many visual processing techniques. By optimizing this surface, we balance visual information against predictions of models with a priori information and extract video objects from a video sequence. Since the global optimization of such an energy function is still an open problem, we use Voronoi Order to decompose our formulation into a tractable optimization via dynamic programming within an iterative framework. In conclusion, we show the results of the system on the MPEG-4 test sequences, introduce a novel objective measure, and compare results against those that are hand-segmented by the MPEG-4 committee.     

一种Job—Shop装配调度算法的研究

针对产品装配任务的调度问题，提出了一种产品装配任务调度算法，经实例验证，取得了满意的效果。