|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Observation and analysis of near-surface atmospheric aerosol optical properties in urban Beijing显示文摘Year-round measurements of the mass concentration and optical properties of fine aerosols(PM_(2.5)) from June 2009 to May 2010 at an urban site in Beijing were analyzed.The annual mean values of the PM_(2.5) mass concentration,absorption coefficient(Ab),scattering coefficient(Sc) and single scattering albedo(SSA)at 525 nm were 67±66μg/m^3,64 ±62 Mm^(-1),360 ±405 Mm^(-1) and 0.82 ±0.09,respectively.The bulk mass absorption efficiency and scattering efficiency of the PM_(2.5) at 525 nm were 0.78 m^2/g and 5.55 m^2/g,respectively.The Ab and Sc showed a similar diurnal variation with a maximum at night and a minimum in the afternoon,whereas SSA displayed an opposite diurnal pattern.Significant increases in the Ab and Sc were observed in pollution episodes caused by the accumulation of pollutants from both local and regional sources under unfavorable weather conditions.Aerosol loadings in dust events increased by several times in the spring,which had limited effects on the Ab and Sc due to the low absorption and scattering efficiency of dust particles.The frequency of haze days was the highest in autumn because of the high aerosol absorption and scattering under unfavorable weather conditions.The daily PM_(2.5)concentration should be controlled to a level lower than 64 μg/m^3 to prevent the occurrence of haze days according to its exponentially decreased relationship with visibility. | Junshan Jing Yunfei Wu Jun Tao Huizheng Che Xiangao Xia Xiaochun Zhang Peng Yan Deming Zhao Leiming Zhang | 2015 | Particuology2015，13，1： | 16 |
| 2 | Optimal Auxiliary Frequency Control of Wind Turbine Generators and Coordination with Synchronous Generators显示文摘Auxiliary frequency control of a wind turbine generator(WTG) has been widely used to enhance the frequencysecurity of power systems with high penetration of renewableenergy. Previous studies recommend two types of control schemes,including frequency droop control and emulated inertia control,which simulate the response characteristics of the synchronousgenerator (SG). This paper plans to further explore the optimalauxiliary frequency control of the wind turbine based on previousresearch. First, it is determined that the virtual inertia control haslittle effect on the maximum rate of change of frequency (MaxROCOF)if the time delay of the control link of WTG is taken intoconsideration. Secondly, if a WTG operates in maximum powerpoint tracking (MPPT) mode and uses the rotor deceleration forfrequency modulation, its optimal auxiliary frequency control willcontain only droop control. Furthermore, if the droop control isproperly delayed, better system frequency response (SFR) willbe obtained. The reason is that coordination between the WTGand SG is important for SFR when the frequency modulationcapability of the WTG is limited. The frequency modulationcapability of the WTG is required to be released more properly.Therefore, when designing optimal auxiliary frequency controlfor the WTG, a better control scheme is worth further study. | Ming Sun Yong Min Lei Chen Kaiyuan Hou Deming Xia Hangyin Mao | 2021 | CSEE Journal of Power and Energy Systems2021，7，1： | 10 |
| 3 | Research Progress in the Key Device and Technology for Fiber Optic Sensor Network显示文摘在纤维的关键设备和技术的最近的研究进步眼的传感器网络(FOSN ) 在这篇论文被介绍。传感器的体系结构光被动网络(SPON ) ,由采用混合波长部门 multiplexing/time 部门 multiplexing (WDM/TDM ) 类似于纤维通讯的技术被动光网络(PON ) ,被建议。混合 TDM/WDM/FDM (频率部门 multiplexing ) 的网络拓扑学计划三尺寸的纤维为完成察觉到性能的极端大的能力,长距离,和高分辨率的眼的察觉到系统被执行并且分析。作为 FOSN 的最重要的设备,几种轻来源被开发,包括在 C 乐队,操作的宽带多波长纤维激光可切换、悦耳 2 m 多波长纤维激光,极端快的锁模式的纤维激光,以及光宽带混乱来源,它在 FOSN 有很好的应用程序前景。同时,为包括纤维连接监视的察觉到的信号和即时差错的宽带光谱解调的 FOSN 的聪明的管理技术被介绍。而且, FOSN 的几个典型应用程序也被讨论,例如纤维眼的煤气的察觉到网络,纤维眼的声学的察觉到网络,和 strain/dynamic 尽力察觉到网络。 | Deming LIU Qizhen SUN Ping LU Li XIA Chaotan SIMA | 2016 | Photonic Sensors2016，6，1： | 2 |
| 4 | Experimental evaluation of nonlinear robust control for SMES to improve the transient stability of power systems 显示文摘 | Liu Feng Mei Shengwei Xia Deming | 2004 | IEEE Trans on Energy Conversion2004，19，4： | 1 |
| 5 | Bifurcations of heteroclinic loops显示文摘 | Deming Zhu Zhihong Xia | 1998 | Science in China Series A: Mathematics1998，，8： | 1 |
| 6 | Experimental Demonstration of Multi-Point Temperature Warning Sensor Using a Multi-channel Matched Fiber Bragg Grating显示文摘 | Sun Qizhen Liu Deming Xia Li | 2008 | IEEE Photonics Technology Letters2008，20，11： | 1 |
| 7 | Purification and reclamation of wastewater by an integrated biological pond system显示文摘PurificationandreclamationofwastewaterbyanintegratedbiologicalpondsystemWuZhenbin;XiaYicheng;ZhangYongyuan;DengJiaqi;ChenXita... | Wu Zhenbin Xia Yicheng Zhang Yongyuan Deng Jiaqi Chen Xitao Zhan Facui Wang Deming (Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China) | 1994 | Journal of Environmental Sciences1994，6，1： | 0 |
| 8 | Prediction model on hydrolysis kinetics of phthalate monoester:A density functional theory study显示文摘As primary degradation products of phthalate esters,phthalate monoesters(MPEs)have been widely detected in various aquatic environments and drawn growing toxicological concerns.Hydrolysis kinetics that is of importance for assessing environmental persistence of chemicals remain elusive for MPEs.Herein,kinetics of base-catalyzed and neutral hydrolysis for 18 MPEs with different leaving groups was investigated by density functional theory calculation.Results indicate that MPEs with leaving groups having p Kaof<10 prefer dissociative transition states.MPEs are more persistent than their parents,and their hydrolysis half-lives were calculated to vary from 3.4 min to 79.2 years(p H=7–9).A quantitative structure-activity relationship model was developed for predicting the hydrolysis kinetics parameters.It was found that p Kaof the leaving groups and electronegativity of the MPEs are key factors determining the hydrolysis kinetics.This work may lay a theoretical foundation for better understanding the chemical process that governs MPE persistence in aquatic environments. | Tong Xu Jingwen Chen Deming Xia Weihao Tang Jiansheng Cui Chun Liu Shuangjiang Li | 2024 | Journal of Environmental Sciences2024，，1： | 0 |
| 9 | Role of hydrogen bond capacity of solvents in reactions of amines with CO2:A computational study显示文摘Various computational methods were employed to investigate the zwitterion formation,a critical step for the reaction of monoethanolamine with CO2,in five solvents(water,monoethanolamine,propylamine,methanol and chloroform)to probe the effect of hydrogen bond capacity of solvents on the reaction of amine with CO2 occurring in the amine-based CO2 capture process.The results indicate that the zwitterion can be formed in all considered solvents except chloroform.For two pairs of solvents(methanol and monoethanolamine,propylamine and chloroform)with similar dielectric constant but different hydrogen bond capacity,the solvents with higher hydrogen bond capacity(monoethanolamine and propylamine)facilitate the zwitterion formation.More importantly,kinetics parameters such as activation free energy for the zwitterion formation are more relevant to the hydrogen bond capacity than to dielectric constant of the considered solvents,clarifying the hydrogen bond capacity could be more important than dielectric constant in determining the kinetics of monoethanolamine with CO2. | Tingting Wang Hong-Bin Xie Zhiquan Song Junfeng Niu De-Li Chen Deming Xia Jingwen Chen | 2020 | Journal of Environmental Sciences2020，32，5： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员