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Search Results: 1 - 10 of 36396 matches for " 彭博 "
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曲阜市大沂河水体重金属污染及健康风险评价
Health Risk Assessment on Heavy Metal Pollution in the Water Environment of Dayihe River
 [PDF]

于霞,
Water pollution and treatment (WPT) , 2013, DOI: 10.12677/WPT.2013.11001
Abstract:

对山东曲阜市大沂河地表水中的铜、铅、镉、锌、锰5种重金属进行了健康风险评价,应用美国环境保护局推荐的健康风险评价模型,分别计算出化学致癌物和非致癌物的风险等级,评价了各种重金属通过饮水途径及皮肤接触途径所致的健康风险。结果表明健康风险的大小依次为Cd > Pb > Cu > Mn > Zn,大沂河水体中此5种重金属所导致的年健康风险水平超过国际辐射防护委员会推荐的最大可接受风险水平5.0×10?5a?1,因此应该提高水体质量,以减少水体中重金属污染对人体健康的伤害,维护生态平衡和人类的可持续发展。

The paper introduced the research of the water environmental health risk assessment of Cu, Pb, Cd, Zn, Mn in Dayihe River in Shandong province based on the model for water environmental health risk analysis recommended by the United States Environment Protection Agency. The levels of risk about chemical carcinogen and non chemical carcinogen were calculated respectively. The health risk caused by drinking water and dermal contact was evaluated. The results show that the order of risk is Cd > Pb > Cu > Mn > Zn, and the total health risk for individual person per year caused by five heavy metals is higher than the maximum tolerable value of 5.0 × 10?5a?1 recommended by ICRP. In order to decrease the damage to human health and maintain the ecological balance and sustainable development of human beings, the water quality should be improved.

岩土热物理指标的分析计算
Analysis and Calculation of Soil Thermal Physical Indicators

友君,
- , 2016,
Abstract: 摘要 地铁车站空调系统节能和通风节能计算需要利用岩土的热物理指标,地铁结构和围岩热物理指标差异在衡量隧道余热被吸收和传导作用时是设计研究的重点问题。一般条件下准确测试岩土的热物理指标比较困难,研究科学的解决方法是地铁勘察的重要课题之一。通过分析当前地铁通风设计和冻结法施工对热物理指标的需求现状,从热物理指标是岩土材料固有的物理性质出发,考虑了地铁工程的特点以及岩土孔隙率和温度对热物理指标的影响,在总结前人有关热物理指标计算方法优缺点的基础上,按照土力学理论进行推导,分岩土类别给出了导热系数和比热容的简化计算公式,公式中未知变量少,补充和完善了地铁勘察手段。将计算结果与实测值的统计结果进行比较,相对误差较小。
“三江”特提斯的演化及成矿意义
胡琳,
地质论评 , 2015,
Abstract:
基于深度学习的车标识别方法研究
,臧 笛?
计算机科学 , 2015, DOI: 10.11896/j.issn.1002-137X.2015.04.055
Abstract: 对交通监控录像中车牌污损、遮挡的肇事车辆信息进行确认是现阶段智能交通系统中的一个重要问题,车标作为一个关键特征,可以起到辅助判别的作用。提出了一种基于深度学习的车标识别方法,相对于以人工提取特征为主的传统车标识别方法,该方法具有可自主学习特征、可直接输入图像等优点。实验表明,这种方法正确率较高,在光照变化和噪声污染下的准确性和稳定性较好,能够有效降低车标识别的错误率。
外源抗氧化剂对小麦穗部性状及生理效应的影响
王文翰,
麦类作物学报 , 1994, DOI: 10.7606/j.issn.1009-1041.1994.05.105
Abstract: 抗氧化剂AsA、α-TH及抗氧化剂的增效剂CA于小麦灌浆期叶面喷施,具有增加叶绿素含量和净光合速率的作用。灌浆后期抗氧化剂具有增强SOD活性、削弱膜脂质过氧化、延缓叶绿素和蛋白质降解、延长叶片功能期的作用。灌浆初期处理可使不孕小穗数减少、可孕小穗数及穗粒数增多、粒重增加。AsA、α-TH和CA处理,以开花后第20d处理增加粒重的效果最好,开花后第10d处理穗粒数增加较多。
市场力量与农村基层组织建设――基于吉林省农安县“项目支书”模式的个案分析
于君,
南京农业大学学报(社会科学版) , 2013,
Abstract: 加强农村基层组织建设的根本目的是赋予农村基层组织有效引导村民进行集体行动,从而贯彻国家意志并维护村民长远发展利益的能力。然而,农村税费改革及农业税废除后基层组织资源与权力的流失,由分散经营生产方式造成的农民小农意识浓厚和机会主义倾向盛行,加之大部分农村地区的“市场边缘化”特征,已经成为农村基层组织能力恢复与提升的主要障碍。通过对吉林省农安县借助“项目支书”模式促进基层组织建设案例的介绍,本文梳理、总结了当地党委、政府调动市场力量进行农业与农民改造的经验和逻辑;并基于委托―代理和激励理论,分析了“能人治村”、农业产业化和基层民主制度三类政策工具对壮大村集体经济、改善公共服务与公共产品供给和吸引农民参与集体行动的协同效应;尝试提出将市场力量整合于农村基层组织建设工作的新路径。??
细菌分子通信和身体域纳米网络
木根,,王文
- , 2016, DOI: 10.13190/j.jbupt.2016.01.001
Abstract: 摘要 纳米与生物技术的快速发展为身体域的分子通信研究提供了强有力的基础.笔者总结了细菌分子通信领域的最新研究进展,介绍了细菌接合传输和细菌分泌传输2种机制以及相关的实验和仿真结果.基于细菌分子通信,讨论了身体域纳米网络相关的中继组网技术,阐述了纳米生物技术的发展趋势和所面临的挑战.
The rapid development of nano and biology technologies pave the way to the research of molecular communication within the body area. The article surveys the recent advents of the bacteria-based molecular communication, in which the bacteria conjugation and bacteria paracrine transmission mechanisms are elaborated, and the related experiment and simulation are presented. Accordingly, the body-area nano-network based on bacteria molecular communication is discussed, and the corresponding relay networking technology is presented. Finally, the future open issues and challenges are discussed.
大功率温差发电技术的产品研发
Research and Applications of the High-Power Thermoelectric Generation Technology
 [PDF]

金安君, 刘大为, , 李启明, 许世森
Sustainable Energy (SE) , 2013, DOI: 10.12677/SE.2013.31001
Abstract: 温差发电技术是一种绿色环保的发电方式,具有无振动、无噪音、体积小以及安全可靠寿命长的特点。本文综述了温差发电技术的研究意义以及现状,介绍了该发电技术的原理。在此基础上,本文给出了大规模集成温差发电器件的设计思路、工艺流程以及测试结果。通过对小功率的样机进行了测试,验证了设计和工艺的可行性。该方案的成功有助于使温差发电技术突破材料成本的制约,为大规模应用奠定基础。最后,对温差发电技术的商业化生产进行了展望。
Thermal electric generation (TEG) is a green energy technology that it has advantages of no-vibration, environmental, no noise, small volume, and long life expectancy. This article will review its current state of development and introduce its principal as well as a new approach by the large-scale integration (LSI) for high-power devices. Using off-shelf devices, we designed, studied, and measured some specified devices. In order to address the commercial fundamentals, we proposed a solution by utilizing LSI TEG to reduce cost. This solution can breakthrough a barrier in processing cost. The article will discuss manufacturability of TEG for future commercialization in a large scale.
热电器件在大功率温差发电技术中的应用
Application of Thermalelectric Device Technology in the Large Power Generation
 [PDF]

刘大为, , 李启明, 金安君, 许世森
Sustainable Energy (SE) , 2012, DOI: 10.12677/SE.2012.24014
Abstract: 温差发电是一种利用热电材料中微观粒子的迁移,将温差产生的热流直接转变为电能的技术。具有体积小、无噪声、可靠性高等特点,是绿色环保的发电方式,具有广阔的应用前景。目前温差发电技术大规模应用的重要制约是发电成本,而微型热电器件的高密度集成技术将是解决这一问题的有效突破口。中国华能集团以国家千人计划专家为核心的研发队伍将以此为切入点,瞄准高效率、大功率热电器件制造技术进行攻关,开发出适用于工业余热回收和可再生能源利用的大功率温差发电装置。
Thermoelectric generation (TEG) is a technology which can directly convert heat flow into electricity with migration of micro-particles among dissimilar thermoelectric materials. TEG is a noiseless, reliable, space-saving, and eco-friendly power generation method, which has great potential in applications. Currently there is an important cost factor to address in order to break-through wide applications of TEG in marketplace. The cost can be under good control with a proposed high density integration of micro thermoelectric devices. Lead by a National 1000-Plan Expert, the research team from China Huaneng Group is making huge efforts in developing the fabrication technology of high efficiency and power density thermoelectric generators. TEG is renewable energy and is suitable for the utilization of waste heat recovery.
固体温差发电技术在太阳能领域的应用和简要综述
Brief Review of Solid State Thermal Electric Energy and Applications in Solar Electricity
 [PDF]

金安君, , 刘大为, 许世森, 常宇春, 张宏斌
Sustainable Energy (SE) , 2012, DOI: 10.12677/se.2012.22007
Abstract: 固体温差发电(TEG)技术是利用塞贝克效应直接将热能转化为电能。TEG的设备具有体积小、无噪声、可靠性高等特点。该技术用绿色环保的发电方式,具有广阔的应用前景。其中对太阳能热的利用是温差发电技术近年发展起来的应用和市场热点。本文对比了温差发电技术与其它太阳能发电方式的异同、并综述讨论太阳能温差发电原理和关键技术。介绍华能集团以国家“千人计划”专家为核心、在开发技术领先的具有市场竞争力的太阳能温差发电解决方案。
Solid state thermal electric generation (TEG) technology directly convert thermal energy to electrical energy. TEG is advantageous in terms of its small size, silent operation and high reliability over traditional sterling-driven thermal electric generators. Furthermore, TEG is one of green technologies with broad applications. In this paper, we compare solar TEG with other solar energy technologies in compelling market values. Moreover, we’ll illustrate the principle and the key technology of solar TEG. We will further review the progress of the solar energy project benefited from a dedicated grant for 1000-plan expert in the China Huaneng Group. This project is lead by the expert of the national 1000-plan in related areas, is to develop products with added IP values, and is to provide a competitive energy solution with TEG technology.
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