|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Buoyancy and turbulence-driven atmospheric circulation over urban areas显示文摘In the buoyancy and turbulence-driven atmospheric circulations(BTDAC) that occur over urban areas where the approach means wind speeds are very low(less than turbulent fluctuations and typically < 3 m/sec), the surface temperatures are significantly higher than those in the external rural areas, and the atmosphere above the mixing layer is stably stratified. In this paper, the mechanisms of BTDAC formation are studied through laboratory experiments and modelling, with additional low-level inflow from external rural areas and a divergent outflow in the opposite direction in the upper part of the mixed layer. Strong turbulent plumes in the central region mix the flow between lower and higher levels up to the inversion height. There are shear-driven turbulent eddies and weaker buoyant plumes around the periphery of the urban area. As the approach flow is very weak,the recirculating streamlines within the dome restrict the ventilation, and the dispersion of pollution emitted from sources below the inversion height leading to a rise in the mean concentration. Low-level air entrained from rural areas can, however, improve ventilation and lower this concentration. This trend can also be improved if the recirculating structure of the BTDAC flow pattern over urban areas breaks down as a result of the surface temperature distribution not being symmetrical, or as the approach wind speed increases to a level comparable with the mean velocity of circulation, or(except near the equator) the urban area is large enough that the Coriolis acceleration is significant. | Yifan Fan Julian Charles Roland Hunt Yuguo Li | 2017 | Journal of Environmental Sciences2017，29，9： | 2 |
| 2 | Distinction between early and late ovarian hyperstimulation syndrome显示文摘 | Rajneesh S Mathur A.Valentine Akande Stephen D Keay Linda P Hunt Julian M Jenkins | 2000 | Fertility and Sterility2000，，5： | 1 |
| 3 | The impact of hyperglycemia on risk of infection and early death during induction therapy for acute lymphoblastic leukemia (ALL)显示文摘 | Julianne M Dare John P Moppett Julian PH Shield Linda P Hunt Michael CG Stevens | 2013 | Pediatr Blood Cancer2013，，12： | 1 |
| 4 | The tail of singular series for the prime pair and goldbach problems显示文摘 | GOLDBACH D A JULIAN Ziegler Hunts TIMOTHY Ngotiaoco | | Library Cornell University USA exprint arxiv0，2014，： | 1 |
| 5 | Earth System Analysis for Sustainability显示文摘 | Schellnhuber Hans Joachim Crutzen Paul J Clark William C and Hunt Julian | 2005 | Environment2005，47，8： | 1 |
| 6 | Methodology for ranking controllable parameters to enhance operation of a steam generator with a combined Artificial Neural Network and Design of Experiments approach显示文摘The operation of complex systems can drift away from the initial design conditions,due to environmental condi-tions,equipment wear or specific restrictions.Steam generators are complex equipment and their proper opera-tion relies on the identification of their most relevant parameters.An approach to rank the operational parameters of a subcritical steam generator of an actual 360 MW power plant is presented.An Artificial Neural Network-ANN delivers a model to estimate the steam generator efficiency,electric power generation and flue gas outlet temperature as a function of seven input parameters.The ANN is trained with a two-year long database,with training errors of 0.2015 and 0.2741(mean absolute and square error)and validation errors of 0.32%and 2.350(mean percent and square error).That ANN model is explored by means of a combination of situations proposed by a Design of Experiment-DoE approach.All seven controlled parameters showed to be relevant to express both steam generator efficiency and electric power generation,while primary air flow rate and speed of the dynamic classifier can be neglected to calculate flue gas temperature as they are not statistically significant.DoE also shows the prominence of the primary air pressure in respect to the steam generator efficiency,electric power generation and the coal mass flow rate for the calculation of the flue gas outlet temperature.The ANN and DoE combined methodology shows to be promising to enhance complex system efficiency and helpful whenever a biased behavior must be brought back to stable operation. | Lara Werncke Vieira Augusto Delavald Marques Paulo Smith Schneider Antônio Joseda Silva Neto Felipe Antonio Chegury Viana Madhat Abdel-jawad Julian David Hunt Julio Cezar Mairesse Siluk | 2021 | Energy and AI2021，3，1： | 0 |
| 7 | 表面粗糙度变化对近地层大气的影响——(Ⅰ)—风速和剪应力变异显示文摘本文系统地分析了任意分布的表面粗糙度变化,对三维和二维大气边界层近地风速和剪应力的影响,提出了一个四层结构的线性理论.由该理论得到的解与已有的结果符合得很好. | 徐大鹏 Julian Hunt | 1991 | 应用数学和力学1991，12，9： | 0 |
| 8 | 季节性抽水蓄能电站:水电、水资源管理和蓄能的一体化途径显示文摘1引言为了未来的可持续发展,我们需要更好地管理自然资源。新的资源管理方法是注重优化水、能源和土地资源之间的相互作用,以便于向社会和经济提供所需的自然资源,如水、矿物质和食物,并保护环境。 | 宁梦(译) 白晶(校) | 2020 | 国外大电机2020，，2： | 0 |
| 9 | Asian Urban Environment and Climate Change: Preface显示文摘The Asian Network on Climate Science and Technology(www.ancst.org), in collaboration with Tsinghua University, held a conference on environmental and climate science, air pollution, urban planning and transportation in July 2015, with over 40 Asian experts participating and presentation. This was followed by a meeting with local government and community experts on the practical conclusions of the conference. Of the papers presented at the conference a selection are included in this special issue of Journal of Environmental Science, which also reflects the conclusions of the Paris Climate meeting in Dec 2015, when the major nations of the world agreed about the compelling need to reduce the upward trend of adverse impacts associated with global climate change. Now is the time for urban areas to work out the serious consequences for their populations, but also how they should work together to take action to reduce global warming to benefit their own communities and also the whole planet! | Julian Hunt Jianping Wu | 2017 | Journal of Environmental Sciences2017，29，9： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员