基于OWL-S的Web服务质量本体的描述模式的设计

基于WSDL的Web服务描述没有涉及到Web服务语义信息的表示,仅仅从语法的角度解决了Web服务信息的描述。随着语义Web概念的提出,如何描述Web服务的语义信息成为学术界研究的热点。论述了OWL S语言如何实现对Web服务的语义描述。同时针对OWL S在描述服务质量方面的不足,提出了Web服务质量本体的描述模式,以方便根据Web服务的质量信息对服务类中的服务进行筛选。

基于关系数据库的油田领域数据质量本体构建

为实现对油田数据质量全方位、规范的描述,以石油领域的相关专业的数据为研究背景,借助于现代先进的本体理论,基于已有的油田数据质量关系数据库资源,抽取出相关概念模型,再将概念模型转换成OWL本体,尝试构建出集数据质量管控于一体的规范的石油领域数据质量本体模型。

通用数据质量评估模型及本体实现

随着数据科学技术在各个领域的深度应用,作为企业重要资产的数据越发表现出它的价值性与重要性.绝大多数企业结合行业特点开发了数据质量检测系统来解决自身数据质量问题.这些系统的评估模型各有特点,对于数据质量维度的定义也是各有千秋.试图将这些模型与数据质量维度以一种通用的形式来定义,旨在成为企业研发数据质量评估系统的标准.通过分析国内外学者在该研究领域取得的成果并结合常年研发数据质量检测与评估系统的经验,首先,提出了一个通用的数据质量检测与评估的数学模型;接着,以此模型为基础,采用本体技术定义了从该通用的数据质量评估数学模型到本体模型映射的转换规则;随后,考虑到多数数据存储在关系数据库中,因此以关系数据模型为例,依据所提出的数学模型和转换规则实现了对数据质量评估本体的抽取与构建,该模型实现了复杂质量规则的定义,具有规范性,实现了对不同来源、不同格式的数据质量进行检测与评估;最后,结合中国石油的油田开发数据质量评估项目进行了系统的实现,验证所提出模型的正确性、科学性、合理性以及可扩充性等.由于所提出的数据质量检测与评估模型与领域无关,所以它具有通用性.

本体评估研究进展

本体评估是根据各种评估指标并采用各种科学的评估方法对影响本体质量的各个要素进行综合测评的过程。本文总结了本体评估的应用场景及意义,从基于指标体系、任务与应用、数据驱动、黄金标准、逻辑与规则、统计分析等几个本体评估角度,对国内外本体评估的方法与工具进行了详细的综述与对比分析,总结了本体评估方法及工具的特点及优劣势,并指出本体评估领域目前面临的困境,如本体评估指标差异大且选择随意、评估方法较多但缺乏实践性、以需求为导向的本体适应性评估研究不足等,并给出了可能的解决法案以及本体评估研究未来的发展方向。

浅谈高速电梯导轨的本体质量和安装质量

指出电梯导轨质量直接影响高速电梯的振动与乘坐舒适度,必须加以控制。导轨质量包括导轨本体质量、导轨安装质量两个方面。详细介绍了影响导轨本体质量的参数及其指标,探讨了高速电梯导轨安装时的注意事项。最后强调,提升导轨本体质量是一项课题,但由于提升导轨本体质量也会面临技术瓶颈及成本压力,可通过提升导轨安装质量来缓解一些导轨本体质量的不足,从而保证电梯运行质量。

基于语义的Web服务发现核心技术研究

在研究Web服务本体描述语言OWL-S缺乏对服务质量的明确刻画的基础上,引入服务质量本体QoSOn对OWL-S规范进行扩展。其次,提出了“两阶段”匹配模型,该算法首先经过基于服务分类的匹配剔除不相关的服务,然后引入服务相似度来度量候选广告服务和请求服务之间的相似程度;候选服务和请求服务之间的相似度是通过OWL-SProfile的功能相似度和QoSOn本体的服务质量相似度两个方面进行综合评估的。最后,通过对比实验证明了该匹配算法的可行性和有效性。

一种基于QoS的Web服务发现模型

当前采用OWL-S描述的Web服务,主要从服务功能进行描述,缺乏对服务质量的明确刻画,导致服务请求者难以得到最佳服务。针对此问题,本文对OWL-S规范扩展,提出一个基于QoS的语义Web服务发现模型SWSDM-Qos。该模型支持QoS的服务发布、查找和反馈,并在此基础上提出一种QOS约束的服务选择算法。本论文创新性之处在于在服务发现过程中加入了服务质量本体信息,使得Web服务在框架内支持QoS约束的语义发现,满足了用户的个性化需求。

Density and Fertilization Optimization for Highyielding Cultivation of a Wheat Variety Heibaoshi 1

The growth period, population tiller dynamics, plant characters, paniclegrain structure, yielding ability and stress resistance of a wheat variety Heibaoshi 1 were studied using a two-factor split plot design to investigate the effects of different density and fertilizer levels on individual development and yield of Heibaoshi 1 in riparian region of Jiangsu Province. In addition, high-yielding agronomic measures were explored through multiple non-linear regression analysis. The results showed that low density was not conducive to the formation of panicles, while high density affected grain number per panicle; low fertilizer level restricted individual development, while high fertilizer level affected grain number per panicle and grain weight and was prone to leading to lodging. Reasonable combination of density and fertilizer could coordinate individual development and balance panicle, grain and weight, thus achieving a high yield. The yield potential was highest （7 384.3 kg/hm2） under density of 239.6×104 basic seedlings/hm2 and N level of 237.7 kg/hm2. When the planting density ranged from 200×104 to 270×104 basic seedlings/hm2 and the N level ranged from 220 to 260 kg/hm2 or the density basic seedling number ranged from 210×104/hm2 to 260×104/hm2 and the N level ranged from 210 to 270 kg/hm2, the yield could exceed 7 200 kg/hm2.

A-BQ,a classification system for anisotropic rock mass based on China National Standard

The rock mass in nature is in most cases anisotropic,while the existing classifications are mostly developed with the assumption of isotropic conditions that not always meet the engineering requirements.In this study,an anisotropic system based on China National Standard of BQ,named as A-BQ,is developed to address the classification of anisotropic rock mass incorporating the anisotropy degree as well as the quality of rock mass.Two series of basic rating factors are incorporated including inherent anisotropy and structure anisotropy.The anisotropy degree of rock mass is characterized by the ratio of maximum to minimum quality score and adjusted by the confining stress.The quality score of rock mass is determined by the key factors of anisotropic structure occurrence and the correction factors of stress state and groundwater condition.The quality of rock mass is characterized by a quality score and classified in five grades.The assessment of stability status and probable failure modes are also suggested for tunnel and slope engineering for different quality grades.Finally,two cases of tunnel and slope are presented to illustrate the application of the developed classification system into the rock masses under varied stress state.

Representation of an Electrical Engineering Curriculum Using an Ontology of Controlled Quality

A curriculum is a complex system that includes a set of core competencies, objectives, contents, methodological and evaluation criteria, regulation among other things. In order to represent a curriculum as a piece of software the common tools used are databases, trees and lists of courses. However, none of these tools can capture the deep and complex relationships among the elements of a curriculum. To avoid this problem, a more complete representation of an engineering curriculum using ontologies has been developed. This paper presents the construction of an ontology for undergraduate electrical engineering curriculum domain at Universidad Nacional de Colombia, which aims to represent, organize, formalize and standardize the knowledge of this domain, so that it can be shared and reused by different groups of people in the field of education and engineering. The ontology includes four curriculum aspects： knowledge in electrical engineering, skills in engineering, electrical engineering curriculum and regulation. For the ontology development, Methontology was selected as methodology and Protege as implementation tool. In addition, there is a proposal of documentation for this methodology, based on principles of quality management systems. This ontology is designed in order to be used in any field of engineering.

Assessment Study on Construction Quality Project of China Local Undergraduate Specialty

This paper focuses on the assessment of college Specialty Construction Project quality. On the basis of conducting researches and analysises of Specialty Construction Practice, the anther selected projects indicators of construction content with high frequency as evaluation index constituent connotation, referring to professional evaluation index system of provincial brand, and defended the issue that there will be no characteristic projects of specialty evaluate; formed the basic architecture of local colleges specialty evaluation index system, clearing grading assessment model, making debate analysis on its value orientation; and confirmed that the Ministry of Education is the main project, the university is the main building, and the provincial education administrative departments or the third party certification is the assessment mainbody, in this way to constitute the innovation management mode of Specialty Construction.

Can Quality of Content Be a Differentiator for Broadcast Programs？ A Case Study in Japan

This paper discusses the idea that the industry can have a differentiator of program quality by encouraging the activities of the Broadcasting Ethics ＆ Program Improvement Organization （BPO） in Japan. The BPO, a worldwide independent organization, has a mission of a breakwater against state power, and thus can be regarded as a kind of media accountability system, as proposed by Claude-Jean Bertrand. We review some controversial affairs in the TV industry and discuss BPO＇s activities aimed preventing ＂yellow journalism＂ and improving the quality of programming. High-quality content may be a differentiator for viewers faced with a choice of media, and thus, we focus on BPO and its role as a differentiator of the Japanese TV industry among the other, especially, Internet media. We also propose four ideas in response of critiques of BPO. Those are to strengthen transparency of governance of BPO, to improve the conformity of the TV industry to BPO＇s assessments of it, to establish a new committee to examine the whole concept of journalism, and to introduce a new certification institution to guarantee quality.

“标准”的解读

对于绘画的标准，由于它的非唯一性、人为性和动态变化性，人们很难作出趋于规范而统一的界定，因而常常令人感到困惑，进而引发穷追不舍地诘问。实际上，绘画正是在对其标准的不断地被追问、认识、反叛或变异的承袭中得到了发展。