共查询到18条相似文献,搜索用时 93 毫秒
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陆莹 《中国自动识别技术》2008,(4)
近日,中国移动与农业部门联合推出的“畜禽及畜禽产品追溯系统”(下称“追溯系统”),利用移动无线通道和RFID技术提供了畜禽及畜禽产品的可追溯性,从养殖、运输、卫生检疫到上市销售整个流程上进行监控和管理。 相似文献
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近年来,国内外各种重大畜禽产品安全事件频繁发生,而运用监控、预警等技术在食品生产、流通等关键环节上进行的质量监控是有效保障食品质量安全的重要手段。文章介绍了射频识别技术与二维码技术,提出了一种基于RFID射频技术与二维码技术的畜产品可追溯系统的解决方案,并给出了具体的系统设计方案。该系统不仅为消费者提供详细的畜产品来源信息,而且为实现肉品预警和追溯提供了可能。 相似文献
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基于RFID与二维码技术的农产品可追溯系统设计 总被引:1,自引:0,他引:1
近年来食品安全事件频繁发生,而运用监控、预警、追踪、追溯等技术在食品生产的关键环节上进行的质量监控是有效保障食品质量安全的重要手段。本文通过运用射频识别技术与二维码技术,构建了一种农产品可追溯系统,并给出了具体的系统设计方案。该系统不仅为消费者提供了详细的农产品信息,而且为企业的生产管理和农产品的质量监控提供了良好的操作平台。 相似文献
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针对当前广东检验检疫技术中心在食品检验过程中无法实时获取食品的动态信息来跟踪监管样品的质量信息和在流转的现状信息,本文提出基于RFID(Radio Frequency Identification)技术对食品进行全流程跟踪追溯系统。首先,简要介绍RFID技术系统的工作原理和应用前景,综述RFID技术在食品跟踪追溯中与其他追溯技术的区别和联系。然后,根据广东检验检疫技术中心的业务需求,建立RFID跟踪追溯系统来实时跟踪、监控食品从封装、运输、交接、流转、检验到处理的全过程,从而实现食品样品的信息可查询、流向可跟踪、责任可追溯。 相似文献
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基于Web多层结构牛肉加工追溯系统的实现 总被引:2,自引:0,他引:2
以牛肉加工产品为研究对象,采用牛肉加工可追溯单元编码技术、RFID技术、网络技术、数据库技术、组件技术、XML技术,建立了基于Web多层结构的牛肉加工质量可追溯系统,实现了牛肉加工过程自动数据采集和信息化管理,为提高牛肉加工产品质量提出可行性方案,具有较好的推广应用前景。 相似文献
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在牛肉加工过程中,牛肉产品的质量安全是人们关注的焦点,提高追溯系统数据采集与传输的准确性能够提高牛肉产品的质量安全.结合HACCP提出一种新的数据采集与传输方法,该方法分析了牛肉加工环节的信息流程,设计了可追溯单元和数据采集与传输的关键点,提出了基于RFID(radio frequency identification)牛肉加工数据采集与传输模型.实证结果表明,该方法能够有效提高牛肉加工环节质量安全可追溯系统数据采集与传输的准确性,进而提高整体质量安全可追溯系统求解的精度. 相似文献
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基于.net的食品质量安全追溯技术的研究与实现 总被引:1,自引:0,他引:1
食品质量安全是公共健康面临的主要威胁之一,国际社会对它的关注程度正逐步加强。通过分析食品质量安全追溯信息的组成,给出了食品质量安全追溯系统的框架结构、追溯码的设计方法和条形码标签的打印方法,并以农产品的质量安全追溯为例,设计了具有C/S与B/S混合结构的农产品质量安全追溯系统,并在.NET平台上开发实现了该系统。 相似文献
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Interactive computation of global illumination is a major challenge in current computer graphics research. Global illumination heavily affects the visual quality of generated images. It is therefore a key attribute for the perception of photo‐realistic images. Path tracing is able to simulate the physical behaviour of light using Monte Carlo techniques. However, the computational burden of this technique prohibits interactive rendering times on standard commodity hardware in high‐quality. Trying to solve the Monte Carlo integration with fewer samples results in characteristic noisy images. Global illumination filtering methods take advantage of the fact that the integral for neighbouring pixels may be very similar. Averaging samples of similar characteristics in screen‐space may approximate the correct integral, but may result in visible outliers. In this paper, we present a novel path tracing pipeline based on an edge‐aware filtering method for the indirect illumination which produces visually more pleasing results without noticeable outliers. The key idea is not to filter the noisy path traced images but to use it as a guidance to filter a second image composed from characteristic scene attributes that do not contain noise by default. We show that our approach better approximates the Monte Carlo integral compared to previous methods. Since the computation is carried out completely in screen‐space it is therefore applicable to fully dynamic scenes, arbitrary lighting and allows for high‐quality path tracing at interactive frame rates on commodity hardware. 相似文献
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Nowadays, the product quality collaborative control technology in supply chain have been concentrated on by many researchers, however, tracing is still a less talking topic among them. Aiming to solve the quality tracing problem in supply chain, a methodology of designing information systems for traceability is proposed in this paper. Based on the former theories, the structures and models of quality tracing in supply chain are firstly introduced, also with a deep discussion on failure diagnosis technology and tracing system design, then a product quality tracing system in supply chain is established, which can provide an easier way and a new sight for the quality control in SCM (Supply Chain Management). Finally, a sample system is showed to illustrate the methodology. 相似文献
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The ray tracing algorithm continues to attract much research and development to improve the quality of the images that are generated, and to reduce the time taken to produce them. By identifying the key requirements of a development system from the user's point of view, we describe a general-purpose multiprocessor solution for ray tracing which may be used to reduce execution time without restricting development of the ray tracing code. The solution is based upon a distributed memory multiprocessor system in which each processor addresses a small amount of memory relative to the size of the model database. Methods for exploiting the coherence of references to entries in the database are described which use a combination of dynamic and static caching techniques. This scheme allows databases of arbitrary size to be supported on multiprocessors with limited distributed memory. 相似文献
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参数曲面求交是计算机辅助几何设计领域中的关键技术之一。针对传统跟踪算法 中曲面求交的漏交和法向共线点处难于处理的问题,提出一种改进的基于微分方程的跟踪算法。 首先选择边界点和拐点作为跟踪的起点,解决了漏交问题。并采用基于交线微分形式的跟踪公 式计算后继交点,解决了法向共线点处难于处理的问题。最后利用牛顿迭代得到精确交点。该 算法不仅正确地跟踪到交线的每个分支,而且易于处理法向共线点处的跟踪,不遗漏关键点, 解决了传统跟踪法在法向共线点处交线不连续的问题。与传统跟踪法对比,其鲁棒性和稳定性 更强,精度更高且收敛略快,适用于求解任意参数曲面求交问题。 相似文献
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Spacetime ray tracing for animation 总被引:1,自引:0,他引:1
Techniques for the efficient ray tracing of animated scenes are presented. They are based on two central concepts: spacetime ray tracing, and a hybrid adaptive space subdivision/boundary volume technique for generating efficient, nonoverlapping hierarchies of bounding volumes. In spacetime ray tracing, static objects are rendered in 4-D space-time using 4-D analogs to 3-D techniques. The bounding volume hierarchy combines elements of adaptive space subdivision and bounding volume techniques. The quality of hierarchy and its nonoverlapping character make it an improvement over previous algorithms, because both attributes reduce the number of ray/object intersections that must be computed. These savings are amplified in animation because of the much higher cost of computing ray/object intersections for motion-blurred animation. It is shown that it is possible to ray trace large animations more quickly with space-time ray tracing using this hierarchy than with straightforward frame-by-frame rendering 相似文献