共查询到20条相似文献，搜索用时 203 毫秒
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An information system is a complex information system. An information model based on CIMS should reflect everyday affairs of the editorial office the same as common information model. Moreover, it has some special aspects. The paper gives an common information model and its structure, along with the information model of an editorial office based on CIMS. The abstract information model of an editorial office is proposed with set theory and topology, and its application and significance are also given. 相似文献
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In the course of Information Engineering of enterprises, because of the existence of unplanned system and information verification, enterprises have to change primary data model of the information system. But existing information organizing technique and theory can not solve the influence that unplanned system and information verification impact on preserve linkage and preserve dependency of the data model, and this has great effect on the process of Information Engineering. Aiming at solving the problem mentioned above, on the basis of Relation Data Theory and making use of E-R model, the paper puts forward an information organization technique based on entity linkage with well expandability and flexibility. The technique can adapt to information verification and adjustment of enterprise. 相似文献
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The technology of product modeling is the basis of Advanced Manufacturing Technologies.Product model is the key to realize sharing information in developing product.Three kinds of product model are compared.Base on it,the concept of product lifecyele information model and its components,the architecture and the approach to modeling are presented. 相似文献
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区块链技术及其在农产品质量安全追溯应用的研究进展 总被引：1，自引：1，他引：0
农产品质量安全是一个备受关注的公共卫生问题,追溯应用已成为保障农产品质量安全的有效手段。确保溯源数据的真实性和安全性,成为追溯应用研究的重点和亟需解决的问题。区块链是一个综合多种技术并确保完全去中心化点对点系统完备性的完整技术方案,具有去中心化、透明化、去信任和数据不可篡改等优点,不受传统中心式技术的制约,在农产品质量安全追溯应用上有很大的发展空间。文章概述了区块链技术的基础架构、关键技术及其在追溯应用上的特点,以及区块链技术和农产品质量追溯的内在关系;通过分析基于公有链、联盟链和改良模式的农产品质量安全追溯研究进展和技术特点,总结了区块链技术在农产品质量安全追溯研究中存在的问题,结合区块链发展趋势,提出了注重横向技术融合、加强监测数据信息上链、建立农产品追溯激励惩罚机制等研究展望。 相似文献
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Surface reconstruction is reproduction process of geometric topology information and feature bases on surface practicality model. The quality of surface reconstruction directly influences performance of production, analysis and manufacture. To improve quality of design and meet requirement of fair, precision, it's researched by the numbers the geometric modeling and constraint of surface reconstruction. Feature-based surface model reconstruction technique is discussed in this article. Combine with 3D model design of motor body covering, an engineering application is given finally. 相似文献
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Mobile Ad Hoc Networks(MANET) is a multi-ho Pand instant self-organized autonomous system of a collection of wireless mobile nodes.A multi-domain full-distributed Certification Authorities system model was proposed founding on its trait of territorial communication.The thesis researched this model and proposes a new model for the interoperability between virtual Certification Authorities named extended recommending trust model based on behavior.It can improve the system's security,retractility and robustness by dynamic trust chain maintenance with feedback information in the actual course. 相似文献
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随着消费者对农产品质量安全的要求不断提高,快速响应、高效控制、安全保障成为现代农产品安全领域的重要课题。由于传统溯源系统存在原始信息少、信息不透明和可靠性差等问题,消费者对农产品溯源技术并不信任。且各组织之间互不信任,信息断层现象时常发生,出现问题后职责追溯困难,安全管控的效果难以满足社会需求。区块链技术的可追溯性、不可篡改和去中心化等特点,可以很好的解决传统溯源系统的缺陷。区块链作为一项新兴技术,在农产品溯源方面具有巨大的潜力。然而,基于区块链技术的农产品溯源系统的优势、挑战和亟需解决的问题,还没有得到充分探讨。本研究以大米溯源系统为例,提出了基于区块链技术的农产品溯源系统的框架设计。详细介绍了如何通过物联网技术获取大米的供应链数据信息。最后,分析了基于区块链技术的农产品溯源方法的优势和挑战。本研究为研究人员和从业人员提供了基于区块链技术的农产品溯源系统的宝贵信息,并对改善农产品可持续性产生了积极的影响。 相似文献
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Auto driving and safe driving constitute a control system which has multiple variables and features of uncertainers and delay response. Anautomobile and its suroundings are considered as a whole and an auto-suroundings feature model is presented based on knowledge expressing method which describles the status appear in the driving process. The constitution of auto driving auxiliary operation expert system is discussed. The computer simulation results show that the proposed knowledge expressing method and sysytem constitution method are effective and feasible . 相似文献
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A product family extension configuration method based on evaluation model for customer demands, relational mapping and extension association rules is introduced to better realize rapid and effective product configuration. A demand-based evaluation model is confirmed by the information of customer demands and a mapping relationship between demand-based model and characters of product family cases is built. The similarity between evaluation model and product family cases is up to the association rules and a product family case with the highest similarity can be extracted according to association rules. According to the situation of the similarity, the extracted case is modified to meet the demands of configuration with case-based reasoning method. The method is validated by a speed reducer case. 相似文献
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In modern society, in order to make full use of information, enterprise not only communicates with interior, but also with the other enterprise. The old PDM (Product Data Management) system can not meet the requirement of enterprise in functions and ranges of management. To retrieve product data easily, the modern enterprises need to store product lifecycle information. At the same time, it is also necessary to expand the function of PDM, in order to share its network information, meet its requirement of collaborating design and make suppliers and partners expediently take part in the management of product data. Based on development of the PDM, this paper expatiates how to expand the old PDM for the modern enterprise. 相似文献
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This paper do some research on the problem of computer vision on autonomous vehicle navigation system on highways. This algorithm first extracts the lane edges by means of wavelet transformation. Then the feature model of the lane markings is built,Which are tracked them in real time. Finally in terms of the parameterized model for the appearance of the lane in the image it fits the lane and get the road direction. This information assures that the whole system can realize lateral control and longitude control. 相似文献
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Design quality review of product is an effective method to improve product quality. The inefficient traditional design review is not accord with modern yield requirement. The multiple system truss of design review is constructed based on the primary characteristics and the requirements of design review and the network technology. The mode of communication between client and server and the flow of design review system based on networks are expatiated. According to different phases of reveiw,the universal quality index system for evaluating the product design is established and the design review system based on networks is realized by NetMeeting. 相似文献
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Wang Tingkai 《保鲜与加工》1989,(6):28-32
The author introduces some basic ideas and methods of artificial intelligence into an information management system,and therefore proposes a design for the information management system which has the ability of inexact reasoning based on the certainty knowledge. According to the design, the system can also be made with the flexibility of change and expansion, and good adaptability for application. This paper describles the design and its programing skill in detail. 相似文献
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The dynamic data exchange is the key to the realization of the collaborative design based on Internet. The features of data for collaborative design based on Internet are analyzed. The data transformation, the data transmission and the data transaction of collaborative design based on Internet are researched. The system configuration and organization mode of dynamic data exchange for collaborative design Internet-based are developed, in which, STEP serves as the product data exchange standard, and ORACLE is the kernel database of the system, so that each of the CAD systems can synchronously access the ORACLE database, share and exchange the design information. The STEP-ORACLE serves as the organizing mode of dynamic data exchange for the collaborative design based on Internet, which realizes the real-time exchange and consistency of the dynamic data between the different platforms and CAD systems. 相似文献
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To solve the problem of lane detection in intelligent auxiliary driving system and as the common ways have some shortcoming such as less real-time and adaptive, the paper raises a new way. Based on the edge being extracted, the feature model of lane markings is built by combining the Median of the Intercepts and the spline. One effective and real time method in highway surface searching and following is presented. The result proves that the method can figure out the way stretching correctly. And therefore, it provides reliable information for the vehicle to be self-anti-deviation. At the same time, it also supplies some valuable discussion on problems existing in its experiments. 相似文献
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基于QFD和TRIZ集成的油辣椒灌装机创新设计 总被引：2，自引：0，他引：2
针对概念设计阶段质量功能展开(QFD)与发明问题的解决理论(TRIZ)作用特点的不同,提出了一种集成QFD与TRIZ理论的产品创新模型。首先运用QFD的质量屋分析用户需求,确定设计冲突,然后结合TRIZ理论进行描述,得出问题的解决方案,并对模型中多目标问题的求解做了一定的改进研究。最后将该模型用于油辣椒灌装机的创新设计,较好地解决了普通灌装机存在的不足,验证了模型对设计过程指导的有效性。 相似文献
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成都市休闲农业模式的对比研究——基于直接主体和间接主体2种模式 总被引：1，自引：1，他引：0
成都市休闲农业作为农村经济的新增长点,呈现出蓬勃发展的势头,其发展模式对未来的发展路径和方向起着至关重要的作用。基于成都市休闲农业直接主体和间接主体2种模式对比分析,分别以郫县农科村和锦江区三圣花乡为典型,对其组织形式、经营形式、产品形式以及营销形式4个方面进行对比研究,分别分析2种模式各自的优劣势,并总结经验和启示：注重政府的角色定位;产品开发营造特色,增强竞争力;注重经营理念的创新及经营水平的提升。最后,提出成都市休闲农业可持续发展的建议。 相似文献