A Bintree Energy Approach for Colour Image Segmentation Using Adaptive Channel Selection

A new hierarchical approach called bintree energy segmentation was presented for color image seg-mentation. The image features are extracted by adaptive clustering on multi-channel data at each level and used as the criteria to dynamically select the best chromatic channel, where the segmentation is carried out. In this approach, an extended direct energy computation method based on the Chan-Vese model was proposed to segment the selected channel, and the segmentation outputs are then fused with other channels into new images,from which a new channel with better features is selected for the second round segmentation. This procedure is repeated until the preset condition is met. Finally, a binary segmentation tree is formed, in which each leaf represents a class of objects with a distinctive color. To facilitate the data organization, image background is employed in segmentation and channels fusion. The bintree energy segmentation exploits color information involved in all channels data and tries to optimize the global segmentation result by choosing the "best" chan-nel for segmentation at each level. The experiments show that the method is effective in speed, accuracy and flexibility.     

公路工程项目招投标探析

近几年,公路工程项目招投标已经建立起较为规范的交易市场,腐败行为也得到了相当程度的遏制。但是我们也应该看到,目前招投标过程中腐败还远远没有杜绝。不公平、不公正的现象还大量存在。但是如不建立起比较科学的、适宜的、现实的招投标规范,从方法和机制上抓住要害,阻止漏洞,腐败就会发生。就目前招投标过程作一探析。     

改性沥青稀浆封层在公路养护工程中的应用

改性乳化沥青稀浆封层技术能很好地处理各种中、轻度裂缝和车辙等问题,通过对改性沥青稀浆封层技术。中材料选择、混合料设计、施工工艺三方面的研究,阐述改性乳化沥青稀浆封层技术在修复公路沥青路面病害中的应用,并对改性乳化沥青稀浆封层施工技术进行分析。     

城市结点处干线公路互通式立交选型研究及实例分析

城市结点处的干线公路互通式立体交叉,选型时影响因素较多,需要对方案进行综合比选,使立交型式在满足干线公路功能的同时,兼顾与城市交通的衔接转换,并与用地条件和城市景观相协调。     

赣州绕城高速公路互通式立交规划设计

赣州绕城高速公路是江西省高速公路网“三纵、四横、五环”中的“一环”,也是地方高速公路“加密、联网”线的组成部分．是赣州至韶关高速公路的重要组成部分。它的建设对于加强江西省赣南地区与广东省粤北地区的沟通具有重要意义。针对赣州绕城高速公路的互通立交规划布局、选型及设计等方面作简单介绍,并对互通式立交规划、选型的方法及设计要点进行分析,可为类似工程提供借鉴。     

大学生职业生涯规划教育与加强学风建设

加强对大学生的职业规划教育是近几年来教育界的一个热门话题,它不仅对规范大学生的成长和未来发展提供了更为科学的指导,而且在学风建设中发挥着重要的作用,是促进学风建设的一个重要动力源.本文试图通过对这一问题的分析,确立大学生职业生涯规划教育理念,并通过职业生涯规划教育更好地促进学风建设.     

基于微观仿真的远引掉头选址规划方法

为了在保障行车安全的前提下,提高远引掉头交通运行效率,分析了远引掉头措施的适用条件,定义了典型应用环境,提出了借鉴国外相关规范以及结合临近路口配时设计的远引掉头选址规划优化方法,并将规划方法放入典型应用环境中,采用微观仿真软件进行评价。仿真结果表明:两种选址规划方法下的远引掉头措施都优于直接左转,其中规范法使平均延误减少了约3.8s,结合配时设计的方法使平均延误减少了约6.8s。可见,在遵循规范的基础上,对临近路口配时进行优化,既保证了行车安全性,又能显著提高交通运行效率。     

层次分析法选择供应商的研究

科学合理地选择供应商,既是企业正常运营的基础和保证,又关系到整个供应链的效率和企业竞争力。本文分析了供应商评价指标体系所应遵循的一般原则,把层次分析法应用到供应商选择问题中,有利于定性指标的定量化,减少了传统供应商评价中过多的主观性;把供应商的选择过程具体化,可明显地提高企业选择供应商的效率。该方法综合考虑了诸如价格、质量和服务等因素在选择供应商时的比重,同时考虑了实际的政策、供应能力等约束条件,在实际运用中具有可行性和实际意义。     

Feature subset selection based on mahalanobis distance： a statistical rough set method

In order to select effective feature subsets for pattern classification, a novel statistics rough set method is presented based on generalized attribute reduction. Unlike classical reduction approaches, the objects in universe of discourse are signs of training sample sets and values of attributes are taken as statistical parameters. The binary relation and discernibility matrix for the reduction are induced by distance function. Furthermore, based on the monotony of the distance function defined by Mahalanobis distance, the effective feature subsets are obtained as generalized attribute reducts. Experiment result shows that the classification performance can be improved by using the selected feature subsets.     

Ship selection using a multiple-criteria synthesis approach

A method is presented for selecting a preferred ship from a group of candidates as a reference ship for a new design. The method is based on a recently developed approach for multiple-criteria decision analysis under uncertainty, the evidential reasoning approach. Using this method, both quantitative and qualitative attributes of a complicated nature can be considered in the selection process. The method consists of three phases: identifying suitable candidate ships, evaluating them in terms of both conventional techno-economical and qualitative attributes, and aggregating all the attributes using the evidential reasoning approach. This three-phase procedure is illustrated by means of an oil tanker selection example. The results of this study show that the evidential reasoning approach can support multiple-criteria ship selection processes when both qualitative and quantitative information with or without uncertainties have to be taken into account. The outcomes generated by the method include the ranking of the candidate ships and indications of their strengths and weaknesses in the format of performance distributions over different assessment grades. Such information is vital in helping decision makers to make an informed selection and be aware of any risk implication associated with the selection.