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Search Results: 1 - 10 of 129236 matches for " 彭文博 "
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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.

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。
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.
基于可再生能源的热电联产技术发展现状和展望
Development and Prospect of Combined Heat and Power Generation on Renewable Energy
 [PDF]

李启明, 刘大为, , 许世森, 金安君
Sustainable Development (SD) , 2013, DOI: 10.12677/SD.2013.33015
Abstract: 可再生能源热电联产技术对于节能减排、改善环境以及实现绿色经济具有积极的意义。太阳能、地热能和生物质能是最具规模化潜力的热电联产可再生能源。本文介绍了国内外可再生能源热电联产技术的发展现状,并对比了各技术的优劣。目前,地热热电联产技术较为成熟,而适应面更广的太阳能热电联产尚处于工程示范和技术开发阶段。基于太阳光谱综合利用的光伏温差发电热电联产技术有望成为下一个研究热点。可再生能源热电联产技术的推广离不开智能电网,而以满足本地用能需求为主,多余电力出售给智能电网的可持续社区将为该技术的大规模推广奠定有力的基础。
The technology of combined heat and power generation on renewable energy (CHP-RE) is of posi- tive significance for energy saving, environment improving and green economy. Solar energy, geothermal energy and biomass energy are the most potential renewable energies for large scale CHP. This paper intro- duced the CHP-RE development at home and abroad, and compared several main CHP-RE technologies. The CHP on geothermal energy is mature, while the CHP on solar energy, which can be used widely, is still in the stage of project demonstration and technology development. The photovoltaic-thermoelectric CHP, based on the comprehensive utilization of solar spectrum, will be the next hot topic in future. The CHP-RE cannot be promoted without smart grid. The sustainable community will lay the foundation for large scale utilization of CHP-RE, in which the needs of local energy are satisfied first and excess electricity can be sold to smart grid.
异构无线通信系统的协同中继节点选择
木根,
北京邮电大学学报 , 2008, DOI: 10.13190/jbupt.200805.82.pengmg
Abstract: 提出了一种基于协同机理的异构无线网络融合机制,并就协同中继节点选择给出了一种基于效用函数的理论优化模型.该模型在保证第1跳和第2跳链路传输速率匹配的前提下,能从全局优化的角度选择最佳的中继节点.为了降低计算复杂度,给出了一种次优的异构协同中继节点选择算法.仿真结果表明,所提出的协同中继节点选择算法能显著提高异构网络的性能.
TDD-CDMA系统上行链路接入控制算法研究
木根,
北京邮电大学学报 , 2004,
Abstract: 理论分析了采用多用户检测技术后时分双工-码分多址(TDD-CDMA)系统的上行链路接入控制机制,给出了新用户或修改用户接入系统时负载和接收功率增加的理论计算公式,提出了一种适合TDD-CDMA系统基于干扰预测的上行接入控制算法。仿真结果表明,该算法能显著提高系统性能,该接入控制算法的最佳门限值与MUD因子有关,当MUD因子大于0时,门限值要大于传统FDD系统所设置的9dB。
基于智能天线技术的码分多址系统容量研究
木根,
北京邮电大学学报 , 2006, DOI: 10.13190/jbupt.200602.81.pengmg
Abstract: 理论分析了影响基于自适应智能天线技术的码分多址(CDMA)移动通信系统上行链路容量的因素,研究了波束赋形平均干扰因子、小区外与小区内干扰比率因子以及多用户检测因子对系统容量的影响.仿真结果验证了理论分析,研究成果可用于自适应智能天线技术下的CDMA系统上行链路容量规划和先进的无线资源管理算法优化.
TD-SCDMA系统上行链路接入控制机制
木根,
北京邮电大学学报 , 2006, DOI: 10.13190/jbupt.200601.64.pengmg
Abstract: 对采用智能天线技术的时分-同步码分多址(TD-SCDMA)系统上行链路容量负载进行了分析,给出了基于智能天线技术的CDMA系统上行链路接入控制算法,并研究了切换用户接入控制门限与新用户接入控制门限的理论模型,通过TD-SCDMA动态系统级仿真验证了本文所提出的算法和模型非常高效.
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