共查询到20条相似文献,搜索用时 156 毫秒
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标准化是现代农业的一个重要标志,也是当今世界农业发展的潮流和趋势,农业标准化是通过建立覆盖产前、产中、产后各个环节的标准体系,从而取得经济、社会和生态的最佳效益。我国农业标准化工作开展的较晚,近几年在党和政府的大力倡导下得到了快速的发展。胡锦涛同志在中央政治局会议上特别强调“没有农业标准化就没有农业现代化,就没有食品安全的保障。”从更高的站位、更深层次的思考诠释了农业标准化工作的重要作用和现实意义。从我国标准化发展的历史上看,《中华人民共和国标准化法》标志着我国的标准化工作进入规范和法制阶段;《农业标准化管理办法》和《农业标准化示范区管理办法(试行)》标志着农业标准化工作得到了重视和加强。从提出建设社会主义新农村开始,农业标准化工作进入大发展阶段。 相似文献
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国务院的这次会议在我国的标准化工作中是一个重要的里程碑。确定了推进标准化工作改革措施、促进经济提质增效升级的举措。明确指出了标准是推动中国经济迈向中高端水平,产业转型升级的关键;也确定了四个工作方向,这对闪联这样长期战斗在我国标准化工作第一线的产业技术联盟给与了极大的支持,必将极大推进我国标准化工作的开展。未来一方面闪联将积极配合国务院在标准化改革方面的指导方向,进 相似文献
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我国协会和联盟的标准化发展研究 总被引:1,自引:0,他引:1
本文正面提出了我国的民间组织制定民间标准的合法性问题,并进行了一定的探讨;对标准化界和我国学术界所作的讨论和基本观点作了简单回顾,对改革开放之后国内的协会和联盟标准化发展进行了梳理.作者认为,我国开始了从完全政府组织制定标准向政府和民间标准化共存的转型.这对我国市场经济转型的突破,提高产业竞争力具有非常重要的意义. 相似文献
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The challenges of the ocean working environment and conditions require that marine instrumentsand equipment be highly reliable and environmentally adaptable.The various parts and componentsof marine instruments should be interchangeable,so as to reduce product costs and reasonably economizethe use of energy and material resources.This paper intruduces the importance of formulating marine instrumentproduct standards,the present conditions and problems of marine product standards,and proposesrelated measu... 相似文献
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Samson Nitonye Sidum Adumene Barivure Marvin Sigalo Charles Ugochukwu Orji Anthony Kpegele Le-ol 《Quality and Reliability Engineering International》2021,37(4):1436-1450
For effective integrity management of marine renewable energy systems in the dynamic and uncertain ocean environments, understanding the failure dynamics is crucial. The cost of investment in marine/offshore renewable energy infrastructures and the associated cost due to failure and loss of energy production necessitate a predictive monitoring methodology that is dynamic and adaptive. This paper presents an integrated multi-state pure-birth-pure-death Markovian-net profit value model for the offshore turbine subsystem failure analysis and its cost-based consequences. The integrated model captures the offshore turbine subsystem's dynamic failure states and its economic implications due to the cost of energy loss and downtime for the period under consideration. The model applies a phase-type exponential distribution to describe the monotonic state of failure. The methodology is demonstrated with an offshore wind turbine gearbox, and it captures the dynamic state of the system and its failure mechanisms. The cumulative effect of the subelements deterioration decreases the gearbox performance by over 35% within the first 2 years of operation. 相似文献
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基于DRL的无人船混合动力系统能量管理策略研究 总被引:1,自引:0,他引:1
无人船混合动力系统的能量管理是提高无人船能源供应稳定性和提升无人船续航里程的关键因素。该文针对无人船运行特点,设计一种光柴储混合动力系统,并提出一种基于深度强化学习的无人船混合动力系统能量管理策略。该文首先分析光柴储混合动力无人船的动力系统结构和运行模式,引入深度强化学习理论,将结合深度学习与强化学习的深度Q网络算法应用于混合动力无人船的智能能量管理方法。仿真结果表明混合动力船舶相较柴电动力船舶在成本、节能和环保等方面具有优势,所提出的能量管理策略具备自学习能力,能合理有效地自主应对突发场景,从而有效支撑无人船技术的发展。 相似文献
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铜质板式换热器是一种新型换热节能材料,在水产养殖、船舶运输、地热资源、化工等领域,具有广阔的应用前景。本文结合其在海水养殖领域的使用情况,对养殖海水固体颗粒物含量和分布进行了调查,并通过现场调查和模拟冲刷实验分析了固体颗粒物对铜质板式换热器的腐蚀影响。结果表明:养殖系统海水固体颗粒物含量很低,其中天然、砂滤和养殖池内3种海水颗粒物含量范围分别在1.3~2.7 mg/L,0.04~0.4mg/L,0.02~0.26 mg/L。天然海水含有大量不规则细小颗粒,池内海水含有大量片状颗粒物,砂滤海水的颗粒特征不明显。许多大颗粒是由纳米颗粒团聚堆积而成的。由于颗粒物含量低,海水流速小,冲刷力小,养殖海水固体颗粒物对铜质板式换热器腐蚀影响轻微。现场腐蚀调查和模拟冲刷实验结果也证明这一点。该研究结果可为铜质板式换热器在海水养殖领域的推广应用提供参考。 相似文献
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Journal of Materials Science - One of the major challenges in off-shore tidal and wave energy devices is the ageing of these structures in the hostile marine environment, which limits their... 相似文献
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Kerr D 《Philosophical transactions. Series A, Mathematical, physical, and engineering sciences》2007,365(1853):971-992
Marine energy is renewable and carbon free and has the potential to make a significant contribution to energy supplies in the future. In the UK, tidal power barrages and wave energy could make the largest contribution, and tidal stream energy could make a smaller but still a useful contribution. This paper provides an overview of the current status and prospects for electrical generation from marine energy. It concludes that a realistic potential contribution to UK electricity supplies is approximately 80 TWh per year but that many years of development and investment will be required if this potential is to be realized. 相似文献