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《环境科学与工程前沿(英文)》 2022年 第16卷 第1期 页码 6-6 doi: 10.1007/s11783-021-1440-4
• MPs were analyzed throughout three WWTPs with mixed domestic–industrial influents.
关键词: Microplastic Wastewater treatment plant Mixed domestic-industrial influent Characteristic Daily fluctuation
Power fluctuation and power loss of wind turbines due to wind shear and tower shadow
Binrong WEN, Sha WEI, Kexiang WEI, Wenxian YANG, Zhike PENG, Fulei CHU
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 321-332 doi: 10.1007/s11465-017-0434-1
The magnitude and stability of power output are two key indices of wind turbines. This study investigates the effects of wind shear and tower shadow on power output in terms of power fluctuation and power loss to estimate the capacity and quality of the power generated by a wind turbine. First, wind speed models, particularly the wind shear model and the tower shadow model, are described in detail. The widely accepted tower shadow model is modified in view of the cone-shaped towers of modern large-scale wind turbines. Power fluctuation and power loss due to wind shear and tower shadow are analyzed by performing theoretical calculations and case analysis within the framework of a modified version of blade element momentum theory. Results indicate that power fluctuation is mainly caused by tower shadow, whereas power loss is primarily induced by wind shear. Under steady wind conditions, power loss can be divided into wind farm loss and rotor loss. Wind farm loss is constant at 3α(3α−1)R2/(8H2). By contrast, rotor loss is strongly influenced by the wind turbine control strategies and wind speed. That is, when the wind speed is measured in a region where a variable-speed controller works, the rotor loss stabilizes around zero, but when the wind speed is measured in a region where the blade pitch controller works, the rotor loss increases as the wind speed intensifies. The results of this study can serve as a reference for accurate power estimation and strategy development to mitigate the fluctuations in aerodynamic loads and power output due to wind shear and tower shadow.
关键词: wind turbine wind shear tower shadow power fluctuation power loss
A novel light fluctuation spectrum method for in-line particle sizing
Shouxuan QIN, Xiaoshu CAI, Li MA
《能源前沿(英文)》 2012年 第6卷 第1期 页码 89-97 doi: 10.1007/s11708-012-0176-z
关键词: in-line measurement particle size distribution (PSD) incident light intensity particle concentration light fluctuation
Evaluation of SWAT sub-daily runoff estimation at small agricultural watershed in Korea
Ganga Ram Maharjan, Youn Shik Park, Nam Won Kim, Dong Seok Shin, Jae Wan Choi, Geun Woo Hyun, Ji-Hong Jeon, Yong Sik Ok, Kyoung Jae Lim
《环境科学与工程前沿(英文)》 2013年 第7卷 第1期 页码 109-119 doi: 10.1007/s11783-012-0418-7
关键词: Soil and Water Assessment Tool (SWAT) sub-daily simulation runoff rainfall
陈志祥,张国兴
《中国工程科学》 2005年 第7卷 第6期 页码 84-87
越来越多的企业开始从产品和市场推广竞争转向产品源头竞争,即通过降低产品开发成本,提高产品开发速度,价值工程是降低开发成本的行之有效的方法;以广东高露洁公司为背景,介绍了日化企业利用价值工程降低产品开发成本的做法。
Zhang Harry, Yu Shaw
《环境科学与工程前沿(英文)》 2008年 第2卷 第3期 页码 267-273 doi: 10.1007/s11783-008-0058-0
关键词: representative hydrologic occurrence simulation approach scarcity alternative
利用地球同步轨道InSAR每日生成DEM的质量分析 Article
杨泽发, 张庆君, 丁晓利, 陈武
《工程(英文)》 2020年 第6卷 第8期 页码 913-918 doi: 10.1016/j.eng.2020.07.003
最新的数字高程模型(DEM)产品在灾害防治、城市管理等诸多领域中扮演着重要角色。利用机载或低地球轨道(LEO)的星载干涉合成孔径雷达(InSAR)生成DEM已被证明是可行且极具价值的方法。然而,受成本和卫星重返周期的限制,该技术难以频繁(如每天)生成或更新大区域范围(如大陆尺度或更大范围)的DEM。由于对地同步合成孔径雷达(GEOSAR)卫星运行于地球静止轨道,因此它们能以相当短的重返时间(每天或更短)观测同一地面区域,这为实现生成每日DEM这一理想但目前难以实现的目标提供了潜在可能。为此,本文系统地分析了利用GEOSAR卫星生成的每日DEM产品质量。结果表明:GEOSAR卫星生成的每日DEM产品精度通常远低于利用传统低轨星载合成孔径雷达(SAR)获得的DEM产品。因此,研究GEOSAR DEM生成过程中的误差削弱方法显得至关重要。
崔慧,吴长春,吴江林,孙青峰
《中国工程科学》 2004年 第6卷 第8期 页码 69-73
东北原油长输管网是中国规模最大的地区性原油运输系统,就该管网基于峰谷电价体制下的运行现状,建立了线性规划数学模型,提出了日输油计划优化问题,并以铁秦线为例进行分析;初步揭示了峰谷电价体制下日输油计划方式的一些基本规律, 表明在该体制下东北管网具有一定的节能降耗潜力。但该方式在一定程度上受到管道本身运行特性的约束,与热油管道相比它更适合于等温管道。
Optimal portfolio design of energy storage devices with financial and physical right market
《能源前沿(英文)》 2022年 第16卷 第1期 页码 95-104 doi: 10.1007/s11708-021-0788-2
关键词: portfolio node price fluctuation transmission right energy storage right risk aversion
Microplastics in municipal wastewater treatment plants: a case study of Denizli/Turkey
《环境科学与工程前沿(英文)》 2023年 第17卷 第8期 doi: 10.1007/s11783-023-1699-8
● High amounts of microplastics are released to receiving media from WWTPs.
关键词: Microplastics Wastewater treatment plant Removal efficiency Daily discharge
Yan GU, Yonglin JU
《能源前沿(英文)》 2012年 第6卷 第1期 页码 21-28 doi: 10.1007/s11708-012-0173-2
关键词: pressure fluctuation rolling floating production storage and offloading unit for liquefied natural gas (LNG-FPSO) offshore
A novel high-temperature and high-pressure hydraulic pump based on mononeuron control
Linhui ZHAO, Xin FANG
《机械工程前沿(英文)》 2009年 第4卷 第2期 页码 219-223 doi: 10.1007/s11465-009-0024-y
关键词: mononeuron PID control hydraulic pump pressure fluctuation
Qian SUI, Jun HUANG, Shuguang LU, Shubo DENG, Bin WANG, Wentao ZHAO, Zhaofu QIU, Gang YU
《环境科学与工程前沿(英文)》 2014年 第8卷 第1期 页码 62-68 doi: 10.1007/s11783-013-0518-z
关键词: PPCPs advanced treatment ozone fluctuation removal contribution
标题 作者 时间 类型 操作
Distribution, characteristics and daily fluctuations of microplastics throughout wastewater treatment
期刊论文
Power fluctuation and power loss of wind turbines due to wind shear and tower shadow
Binrong WEN, Sha WEI, Kexiang WEI, Wenxian YANG, Zhike PENG, Fulei CHU
期刊论文
A novel light fluctuation spectrum method for in-line particle sizing
Shouxuan QIN, Xiaoshu CAI, Li MA
期刊论文
Evaluation of SWAT sub-daily runoff estimation at small agricultural watershed in Korea
Ganga Ram Maharjan, Youn Shik Park, Nam Won Kim, Dong Seok Shin, Jae Wan Choi, Geun Woo Hyun, Ji-Hong Jeon, Yong Sik Ok, Kyoung Jae Lim
期刊论文
Critical flow-storm approach to total maximum daily load (TMDL) development: an analytical conceptual
Zhang Harry, Yu Shaw
期刊论文
Numerical simulation and analysis of periodically oscillating pressure characteristics of inviscid flow in a rolling pipe
Yan GU, Yonglin JU
期刊论文
A novel high-temperature and high-pressure hydraulic pump based on mononeuron control
Linhui ZHAO, Xin FANG
期刊论文