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1.
本体是一种能够有效提高农作物种质资源整合、共享和利用效率的组织方式。在分析传统本体构建方法的基础上,结合中国农作物种质资源自身的特点,提出结构化数据与非结构化数据相结合的半自动化本体构建方法。该方法首先基于面向对象的思想从关系数据库中抽取概念及其关系建立初始本体;然后从非结构化的网站数据中提取概念,并利用在线字典WordNet和网络百科全书Wikipedia丰富概念的语义,完善初始本体。使用本体构建工具Protégé构建了农作物种质资源本体模型。实验表明,该方法既充分利用了数据库中的资源,又考虑了非结构化数据的补充作用,减少了构建成本,本体更加完善。探讨了本体进化的途径,指出了本研究的优点和局限性。 相似文献
2.
An approach based on hybrid semantic model (HSM) was proposed to the solve problem raised in the retrieval process of product knowledge documentation. It expands the traditional user query to a semantic set composed of user preference, context and query, while representing the knowledge documents and user interest with an ontology based fuzzy concept. The leaves in the ontology are selected as components of the document concept vector with the weight determined by the depth of the concept in the ontology graph, the quantity of the information contained, and occurrence in the document and the whole repository. Furthermore, ontology is used to express context and query, and to construct a user preference model. Different relevancy computation methods are adopted for different retrieval models. The semantic similarity between query or user preference and documentation is computed by cosine method. The semantic similarity of context is estimated by the concept distance in the concept hierarchy. Finally, the method is shown by experimentation to be more effective than the classic vector space method. 相似文献
3.
The service-oriented manufacturing paradigm is a new advanced manufacturing paradigm. In order to support it, a cloud service resource sharing model for service-oriented manufacturing is proposed. Based on the analysis of the features of manufacturing resource under the service-oriented manufacturing, concepts of cloud service resource and cloud service resource pool are defined, then service-oriented manufacturing resource and service-oriented process are realized through resource unified modeling, resource matching and resource optimization. The cloud service resources are classified by ontology method, then semantic and vector distance algorithm are adopted for intelligent search. Finally, service mode and realization technology are verified through a PLM soft resource application case. Theoretical analysis and experimental results suggest that the proposed resource service sharing model can meet the requirements of the service-oriented manufacturing. 相似文献
4.
基于本体推理和数据挖掘的良好农业规范专家系统 总被引：1，自引：0，他引：1
针对良好农业规范(good agricultural practices,GAP)标准内容复杂,不易被农业生产者准确使用的问题,将本体推理和数据挖掘技术相结合,构建了良好农业规范专家系统,实现标准知识查询和GAP控制点推荐等功能,更好的帮助生产者理解和使用GAP。系统构建过程中,采用本体知识表示方法构建GAP标准知识库,通过解析“良好农业规范生产和认证信息服务平台”的GAP电子检查表记录,对挖掘过程中涉及的关联规则算法进行分析和改进,挖掘分析了用户对控制点使用的偏好。设计了控制点评价模型,实现了GAP控制点的择优推荐。系统基于MVC模式,设计为3层体系架构。通过测试应用,用户能够准确和容易的使用GAP标准。 相似文献
5.
针对水产养殖企业流程各异,品种不一,生产过程关键控制点不同导致采集的信息异构、难以有效共享和缺乏共同理解等问题,采用本体作为知识的表示方法,根据水产养殖领域的特点提出了一种新的领域本体的构建方法,将构建过程划分成规范化、概念化和本体实现3个阶段,并组成一个本体构建迭代流程。这种本体构建方法易学、易用,减少了系统开发的工作量,为解决本体的快速构建问题提供了一个新的思路。 相似文献
6.
基于本体的茶叶知识服务系统研究与实现 总被引：1，自引：1，他引：0
传统农业知识服务系统缺乏语义支持,并且在农业领域应用极为不足,本研究提出利用本体论和语义网知识建立知识服务系统的必要性。以茶叶领域为例,分析了生产过程中各类用户的实际需要,设计了适合农业生产实际的茶叶知识服务系统工作流程与主要模块,模块由三层架构组成：用户服务接口,知识服务平台以及知识库。描述了系统实现中的关键技术,如茶叶本体的构建方法,系统信息抽取算法以及系统的具体实现等,初步实现了系统功能。 相似文献
7.
Through construction market survey, the paper proposes the way of the control system of construction quality of building engineering and establishes objective system of its on becoming core of quality control spot. It puts forward many grade control and evaluation net and expounds the method to produce quality evaluation form, control system of quality ordinary question and quality analysis. It determines technology way and movement foundation on system development. The paper introduces the model and its function on the control system of construction quality of building engineering. This system is a opening system, it may be filled and complemented with new content at any time. It has better adaptable to change of construction code. 相似文献
8.
In this paper,first,three assessment systems for green building,namely the LEED(USA) and GOBAS(China) are compared with CASBEE(Japan) in respect of central concepts,mark of evaluation and result of assessment.It is expected that this research of assessment systems could be helpful to designers of architecture in different specialties.Secondly,in this paper these three assessment systems are analyzed from the position of design work.In the end,it is pointed out that to compile a design-oriented handbook for green building design is the new domain of the assessment system for green building. 相似文献
9.
《Journal of Landscape Research》2013,(3)
Ecological progress is a new stage in the development of human civilization and ecological city is a new city development model under the concept of ecological progress. In this paper, favorable conditions and constraints for constructing an ecological city are analyzed and construction concepts are put forward. It contributes to the construction of Liaocheng into an ecological city and has a referential value for other cities. 相似文献
10.
基于耕地保护的城市发展空间生态适宜性评价研究 总被引：2，自引：2，他引：0
针对城市边缘地带建设用地快速增长与优质农用地大量减少的矛盾,以驻马店为例,在充分考虑农田的生态服务功能的基础上,构建了建设用地生态适宜性评价系统和耕地自然生产潜力评价系统组成的生态适宜城区扩展用地评价方法,评价了城市建设用地的生态适宜性和农地的自然宜耕性,基于保护优质耕地的目标,划分了适宜性发展空间分区,将城市发展空间划分为重点开发、优化开发、限制开发和禁止开发4个类型,结合宜居城市建设对不同分区内的耕地功能用地进行了分析,探讨了扩展用地时空配置的方法和途径。结果表明：驻马店市重点、优化、限制和禁止开发区面积分别占研究区总面积的37.05%、28.87%、17.75%、16.33%。该评价方法为城市边缘地带新增建设用地的时空配置提供了参考。 相似文献
11.
Competition among construction companies becomes drastic while market economy is gradually established in China.It is a problem of concern that how to rationally evaluate the competitive ability of construction companies in order to plan the competitive strategy for companies.The multi index system and comprehensive index are proposed in this paper and Analytic Hierarch Process(AHP) is applied to calculate the weights of multi index.The evaluation model of competitive performance of construction companies is presented based on AHP.An example for the evaluation model is given.The results demonstrate that the model can be used to efficiently evaluate the competitive performance of construction companies.The competitive strategy can be suggested through analyzing some factors influencing the competitive performance of construction companies. 相似文献
12.
Based on the complex geological environment and hydro-geological conditions in mountainous areas the fuzzy comprehensive evaluation index system of the mine geological environment is constructed. It uses the weak fuzzy consistent matrix and analytic hierarchy process to calculate the weight, which solves the question that traditional AHP is difficult to meet the consistency test. According to the special geological conditions of the mine, it divides the impact of the geological environment into three levels, builts the fuzzy comprehensive evaluation table and determines the membership degree of the influencing factors. Combined with fuzzy comprehensive evaluation method, it developes a second-order fuzzy comprehensive evaluation model of the impact of the mine geological environment. By means of the application of this model to the actual mining, it shows that the evaluation results of the model are highly similar to the actual results of the impacts of landslides, land subsidence and other geological disasters. 相似文献
13.
为了适应国家新经济时代对人才的需求,高校食品专业亟待在教学理念、方法和效果评价机制等方面积极改革。课程体系是人才培养的核心,为了构建基于OBE理念和新工科建设的适合学校食品专业的课程体系,以马来西亚博特拉大学食品专业课程设置为例,就其课程设置方面的特色进行分析探讨,并就OBE理念和新工科建设在国内高校食品类专业课程体系建设中的改革实践提出建议。 相似文献
14.
FENG Wei-min~ 《保鲜与加工》2004,(6):103-108
The society-economy-environment appraisal for construction project can help our government to control macro-economy, make correlation policy and formulate laws and draw up city plan.It has great influence on the sustainable development of our society and it is the demand of the law for the environment evaluation in China.This paper introduced the basic structure of society-economy-environment appraisal system for construction project and the thought of elements transaction.Using the method of AHP, the model of project analyzing and optimizing selection is designed.For the more, the methods of the optimizing models on the selected schemes are put forward.Finally, the integrative analysis has been made on the system design and appliance of this appraisal system. 相似文献
15.
农村居民点建设适宜度评价是高效利用农村土地资源的基础。为探讨物元模型在农村居民点建设适宜度评价中的应用,基于物元模型,按照相关项目相关标准,从自然条件、生活条件、生产条件等方面,选取了10个指标构成农村居民点建设适宜度评价的指标体系。在物元分析理论的基础上,构建了居民点适宜度评价的物元模型,并采用该模型对鄂州市汀祖镇居民点建设现状进行评价。研究结果表明：物元模型能够揭示单个评价指标的分异信息,适合用于鄂州市汀祖镇农村居民点建设适宜度评价。利用物元模型对农村居民点建设适宜度进行评价,将有助于集约节约利用土地,高效整合利用土地资源。 相似文献
16.
In this paper, we propose some basic concepts of the performance evaluation on testing unconstrained optimization software and furtherdesign a performance testing package-OPTEST-1, which is used to test optimization programs on three areas: systems of nonlinear equations, nonlinear least squares, and unconstrained minimization. We also describe criteria of the performance evaluation, system functions, and the approach of performing OPTEST-1. 相似文献
17.
HU Wen - fa 《保鲜与加工》2006,(4):98-100105
Political risk is one of the common risks in international construction projects, the political risk is analyzed in this paper and an evaluation model of political risk in international construction projects is presented based on BP algorithm, The model is a self- study and self- adaptive one in risk evaluation. Through the simulation study with practice data, with this model the cost improvement of international construction projects can be predicted in political risks exactly, it is useful in evaluating the comprehensive political risk. 相似文献
18.
Along with the increase in the number of large-scale construction projects, a series of negative effects concerning various interest-related parts have emerged,which urges a comprehensive and objective evaluation of construction project so as to evaluate its overall satisfaction. In this paper,an evaluation indexes system of construction project satisfaction was advanced,which consists of 19 values coming from all main interest concerning parties, including users, investors, owners, suppliers, government and organizations nearby. A BP neural network evaluation model was built which was self-adaptive, self-organizing and self-study. And this evaluation model was applied to specific project ease. The result showed that this approach can improve the reliability and effectiveness of satisfaction evaluation of the construction project. 相似文献
19.
以中国渔政管理指挥系统作为评价对象,将该系统的信息化建设的长远目标和近期目标、内在组织流程和外部影响因素等诸多方面结合在一起,基于AHP层次分析法和模糊综合评价法构建中国渔政管理指挥系统管理信息化绩效评价模型和多层次、多维度的评价指标体系,实现对中国渔政管理指挥系统管理信息化绩效的客观评价。通过对管理信息化绩效评价的研究,将为渔业管理部门提供系统实用的信息化评价方法和工具,帮助渔业管理部门明确在信息化需求和实施绩效方面的优势和薄弱环节,便于管理决策层及时掌握当前的信息化实施状态。 相似文献
20.
本文采用文献研究法,从评价指标选取原则、评价指标内涵、评价方法3个方面对国内都市现代农业发展水平评价体系文献进行梳理,发现国内都市现代农业发展水平评价体系渐趋完善,评价方法丰富。但还存在着一些问题如：指标内涵的确定主观性太强;文化指标、都市农业观光等功能性指标的研究较少;评价指标权重的确定太过主观能动性;研究对象较单一等。提出了未来应当继续从以下几个方面开展研究：（1）在确定指标时,应当选择典型性的指标,并且以因子分析法为主,使指标更加科学化、合理化;（2）重视文化、都市观光等新兴指标的研究,并与社会、经济、社会发展指标相融合、关联,展现都市农业的多功能特征;（3）在对指标权重进行赋值时,为了避免主观性,多采用数学建模的方式;（4）丰富研究对象,开展不同对象之间的比较研究（包括横向和纵向发展水平比较）。研究为科学评估现代都市农业发展水平、构建现代都市农业发展水平评价体系提供了借鉴。 相似文献