共查询到17条相似文献,搜索用时 46 毫秒
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生猪养殖设施工程技术研究现状与发展分析 总被引:7,自引:0,他引:7
生猪养殖业是我国畜牧业的支柱产业,随着生猪养殖从分散养殖向规模化养殖的发展,对生猪养殖设施工程技术的需求日渐增加。为了向生猪养殖业发展提供参考与支持,对生猪养殖关键设施工程技术的研究与发展状况进行了总结和分析。重点对猪舍、育仔、饲喂、粪污处理设施工程环节进行研究与发展分析。目前,我国已初步形成了适合国情的生猪养殖设施工程技术体系,但与国外发达国家的生猪养殖设施工程技术还存在一定差距,存在养殖设施工程各环节发展不均衡,养殖工程的机械化、自动化、智能化技术水平较低,关键养殖设施工程技术的基础性研究体系不健全,养殖设施配套性差,养殖机械的适用性和可靠性较低等问题。建立健全的生猪养殖设施工程技术的研究体系,加强养殖、饲料、设施工程、资源环境等方面相互融合与协作、深入与系统的研究,开展适于我国南北方配套应用的生猪养殖设施与设备研发,实现生猪养殖过程的健康/福利化、生态化、自动化及至智慧化,将是我国生猪养殖设施工程技术的发展方向。 相似文献
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基于分布式流式计算的生猪养殖视频监测分析系统 总被引:2,自引:0,他引:2
基于分布式流式计算框架,提出了节点资源调度器算法,构建了可插拔的分布式流式实时计算模型,研究开发了生猪养殖视频监测分析系统。系统实现了规模化生猪养殖视频流数据采集、任务调度、实时计算、可插拔式扩展和结果展示的功能。在由1个主节点和3个从节点构成的集群下,采用改进混合高斯模型的背景更新方式,实现集群下多摄像头多目标的实时检测。平均处理速度比传统混合高斯模型提高了29.00%,平均检测率为79.00%,平均误检率比传统混合高斯模型降低了70.96%。测试结果表明,可插拔分布式流式实时计算模型具有较好的可扩展性,视频流处理算法速度和实时性得到了提升,具有较高的检测率和较低的误检率。 相似文献
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农药残留检测对于保障农产品质量安全具有重要意义。针对其专利密集的产业特点,依托Patsnap全球专利数据库,通过IPC国际分类号与关键词相结合依次开展初步检索、扩展检索与补充检索,检索共获得全球116个国家和地区的23 281条农残检测领域技术专利,其中发明与实用新型专利分别为21 422与1 859条。基于检索结果进行专利分析,由国际、国内两个层面分别从专利构成、法律状态、年度申请趋势、专利授权率、国别(省市)分布、技术分支及申请人分布特征等多维度评估农残检测技术创新现状与发展态势。评估显示:全球农残检测相关专利申请整体呈震荡上升且地域分布差异明显的态势;传统检测技术面临发展瓶颈,生物化学、基因及遗传工程、有机合成将是农残检测技术发展的主导方向;中国农残检测专利申请量大但整体技术水平不高,部分尖端技术领域“卡脖子”问题依然突出,提高专利总体质量、力争打破欧美技术垄断将是未来工作的重点。 相似文献
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阳极材料自腐蚀和钝化是铝空气电池的主要技术问题。本文以TRIZ理论和专利分析为基础,研究铝空气电池阳极材料的技术创新方案,为铝空气电池研发提供一定的参考。 相似文献
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针对养鸡场鸡蛋拾取强度大、效率低、破损率高和成本高等问题,结合目前我国相关装置的全自动化和机械化程度相对较低的现状,设计研发了一种针对多层式鸡笼的全自动收蛋装置,可实现多层式鸡笼鸡蛋采集、转移和装盒的全自动化。阐述了自动收蛋机的设计思路、整体结构和各部分的工作原理,对蛋槽输出门装置和阶梯式鸡蛋降落装置等关键结构进行试验;利用UG软件建模分析自动收蛋机整体结构尺寸的合理性;通过制作样机进行多指标正交试验。试验结果确定该机关键装置最佳设计参数为小车车速9 cm/s、升降门间距15 cm、阶梯式降落装置水平夹角60°。在最佳设计参数下,多层鸡笼的全自动收蛋一体化装置的收蛋效率2 250个/h,鸡蛋无破损率99.7%,相较于人工拾取鸡蛋效率提高50%。 相似文献
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《Agricultural Systems》2005,84(3):279-295
The model concerned was a mechanistic model for pig growth and composition which was constructed using novel algorithms for the accumulation of protein and lipid. The model was parameterised using data collected from a serial slaughter trial of three different types of pigs and the sensitivity to parameters of biological importance was explored. The types (‘Landrace’ type, ‘Pietrain’ type and ‘Meishan’ type) were chosen to represent ‘lean’, ‘meaty’ and ‘fatty’ types.After optimisation, fitted parameters were found to lie close to the values that would be expected given the assumptions made during the construction of the model, with a predicted maximum protein retention rate of 0.20 kg d−1 and an efficiency of recapture of amino acids during turnover of 0.94. Mean absolute percentage errors at slaughter point for modelled live weight were ca. 5%, compared with 8% for protein mass and 13% for lipid mass, suggesting that live weight gain is easier to predict than the partitioning of biomass into retained protein and lipid. 相似文献
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Control engineering approaches may be applied to irrigation management to make better use of available irrigation water. These methods of irrigation decision-making are being developed to deal with spatial and temporal variability in field properties, data availability and hardware constraints. One type of control system is advanced process control which, in an irrigation context, refers to the incorporation of multiple aspects of optimisation and control. Hence, advanced process control is particularly suited to the management of site-specific irrigation. This paper reviews applications of advanced process control in irrigation: mathematical programming, linear quadratic control, artificial intelligence, iterative learning control and model predictive control. From the literature review, it is argued that model-based control strategies are more realistic in the soil–plant–atmosphere system using process simulation models rather than using ‘black-box’ crop production models. It is also argued that model-based control strategies can aim for specific end of season characteristics and hence may achieve optimality. Three control systems are identified that are robust to data gaps and deficiencies and account for spatial and temporal variability in field characteristics, namely iterative learning control, iterative hill climbing control and model predictive control: from consideration of these three systems it is concluded that the most appropriate control strategy depends on factors including sensor data availability and grower’s specific performance requirements. It is further argued that control strategy development will be driven by the available sensor technology and irrigation hardware, but also that control strategy options should also drive future plant and soil moisture sensor development. 相似文献
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设施农业的现状分析及展望 总被引:37,自引:1,他引:37
设施农业是随着农业现代化和农村种植业结构调整而发展起来的新型产业。近年来,我国设施农业得到了较大发展。为此,分析了我国设施农业的现状,并对我国设施农业的发展方向进行了展望。 相似文献
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