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Recent advances,challenges,and perspectives on carbon capture

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Frontiers of Environmental Science & Engineering 2024年第6期18卷 75-104页

作者： Shihan zhang Yao Shen Chenghang Zheng Qianqian Xu Yifang Sun Min Huang Lu Li Xiongwei Yang Hao Zhou Heliang Ma Zhendong Li yuanhang zhang Wenqing Liu Xiang Gao Institute of Energy and Sustainable Development Zhejiang University of TechnologyHangzhou 310014China College of Environment Zhejiang University of TechnologyHangzhou 310014China Baima Lake Laboratory Hangzhou 310051China Institute of Carbon Neutrality College of Energy EngineeringZhejiang UniversityHangzhou 310027China State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine MechanicsHFIPSChinese Academy of SciencesHefei 230031China

Carbon capture,utilization and storage(CCUS)technologies play an essential role in achieving Net Zero Emissions *** the lack of timely reviews on the recent advancements in promising CCUS technologies,it is crucial to provide a prompt review of the CCUS advances to understand the current research gaps pertained to its industrial *** that end,this review first summarized the developmental history of CCUS technologies and the current large-scale ***,based on a visually bibliometric analysis,the carbon capture remains a hotspot in the CCUS *** that the materials applied in the carbon capture process determines its *** a result,the state-of-the-art carbon capture materials and emerging capture technologies were comprehensively summarized and *** between state-of-art carbon capture process and its ideal counterpart are analyzed,and insights into the research needs such as material design,process optimization,environmental impact,and technical and economic assessments are provided.

关键词： Carbon capture,utilization and storage Visualization analysis Research hotspots and trends CO_(2)capture technology

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风电租赁储能参与电能-调频市场竞价策略

电网技术 2024年第5期48卷 1992-2002,I0057,I0054-I0056页

作者：李咸善胡长宇张远航李欣李飞梯级水电站运行与控制湖北省重点实验室(三峡大学) 湖北省宜昌市443002 三峡大学电气与新能源学院湖北省宜昌市443002

风电参与市场化竞价运营,可有效激发风电的市场力及其主动租赁储能改善调频性能的积极性,在提升风电运营效益的同时,助力电网的调频调峰,但需解决风储调频性能指标优化及其电能-调频双市场竞价策略协同优化等关键问题。为此,提出了风电... 详细信息

风电参与市场化竞价运营,可有效激发风电的市场力及其主动租赁储能改善调频性能的积极性,在提升风电运营效益的同时,助力电网的调频调峰,但需解决风储调频性能指标优化及其电能-调频双市场竞价策略协同优化等关键问题。为此,提出了风电参与电能-调频市场竞价双层优化模型:上层为双市场多主体竞价出清模型;下层为各主体竞价策略优化模型,响应上层出清结果,优化调整竞价策略,达到各主体效益最大化。下层模型嵌套了考虑风电不确定性的储能运营商与风电集群储能租赁价格/容量主从博弈优化模型。双层模型联合求解,得出最终风电集群租赁储能容量及其双市场竞价策略。算例结果表明,所提方法能够提升风电运营效益,助力电网调频调峰。

关键词：风电集群综合调频性能指标不确定性储能租赁多主体竞价主从博弈两阶段鲁棒优化

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Review of technologies and their applications for the speciated detection of RO2 radicals

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Journal of Environmental Sciences 2023年第1期123卷 487-499页

作者： Yue Gao Keding Lu yuanhang zhang State Key Joint Laboratory of Environmental Simulation and Pollution Control State Environmental Protection Key Laboratory of Atmospheric Ozone Pollution ControlCollege of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China

Peroxy radicals(RO_(2)),which are formed during the oxidation of volatile organic compounds,play an important role in atmospheric oxidation ***,the measurement of RO_(2),especially distinct species of RO_(2)radicals,is important and greatly helps the exploration of atmospheric chemistry *** the speciated detection of RO_(2)radicals remains challenging,various methods have been developed to study them in *** methods can be divided into spectroscopy and mass spectrometry *** spectroscopy methods contain laser-induced fluorescence(LIF),UV-absorption spectroscopy,cavity ring-down spectroscopy(CRDS)and matrix isolation and electron spin resonance(MIESR).The mass spectrometry methods contain chemical ionization atmospheric pressure interface time-of-flight mass spectrometry(CI-APi-TOF),chemical ionization mass spectrometry(CIMS),CI-Orbitrap-MS and the third-generation proton transfer reaction-time-of-flight mass spectrometer(PTR3).This article reviews technologies for the speciated detection of RO_(2)radicals and the applications of these *** addition,a comparison of these techniques and the reaction mechanisms of some key species are ***,possible gaps are proposed that could be filled by future research into speciated RO_(2)radicals.

关键词： Speciated RO_(2)radicals Atmospheric chemistry Reaction mechanisms Mass spectrometry

应用显式模型预测控制的永磁同步风电机组频率电压协同调节

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西安交通大学学报 2024年第8期58卷 9-18页

作者：闫逸辰寇鹏张远航李华李旭东熊尉辰梁得亮西安交通大学电气工程学院西安710049 西安交通大学电工材料电气绝缘全国重点实验室西安710049 西安交通大学陕西省智能电网重点实验室西安710049 国网陕西省电力有限公司电力科学研究院西安710100

为解决高压直流输电线路发生闭锁故障引起送端近区功率冗余、造成频率和电压升高的问题,提出了一种面向频率电压协同调节的永磁同步风电机组的显式模型预测控制(EMPC)策略。该控制策略利用了直驱式永磁同步风力发电机组具有同时调节电... 详细信息

为解决高压直流输电线路发生闭锁故障引起送端近区功率冗余、造成频率和电压升高的问题,提出了一种面向频率电压协同调节的永磁同步风电机组的显式模型预测控制(EMPC)策略。该控制策略利用了直驱式永磁同步风力发电机组具有同时调节电网频率和电压的能力。根据频率摆动方程和电压灵敏度模型建立了换流站母线电压和电网频率的状态空间模型;将永磁同步风电机组的有功输出和无功输出相结合,利用多个EMPC控制器计算代价函数下的最优输出并进行组合,计算出故障后永磁同步风电机组的参考功率输出,以实现送端近区频率和电压的协同控制。在MATLAB/Simulink平台进行仿真验证表明:当闭锁故障发生时,EMPC控制策略不仅可以降低送端近区的频率和电压的峰值与稳态值,而且与其他控制方法相比,频率峰值降低了0.089 Hz,电压峰值降低了0.012(标幺值)。该研究可为电力系统的频率电压控制提供理论及工程参考。

关键词：永磁同步电机风力发电频率控制电压控制显式模型预测控制

职住地建成环境对轨道交通通勤行为的非线性影响机制研究——以武汉市为例

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地理科学 2024年第9期44卷 1534-1543页

作者：彭建东张远航申犁帆代琦杨红武汉大学城市设计学院湖北武汉430072 北京邮电大学经济管理学院北京100876 武汉市规划研究院湖北武汉430014 武汉大学测绘遥感信息工程国家重点实验室湖北武汉430072

改革开放以来中国大城市快速蔓延导致了职住分离及交通拥堵等问题,倡导轨道交通等绿色交通方式出行成为大城市缓解通勤压力的重要手段。当前研究主要以居住地作为地理背景考察建成环境对轨道交通通勤的作用,但较少探索就业地建成环境的... 详细信息

改革开放以来中国大城市快速蔓延导致了职住分离及交通拥堵等问题,倡导轨道交通等绿色交通方式出行成为大城市缓解通勤压力的重要手段。当前研究主要以居住地作为地理背景考察建成环境对轨道交通通勤的作用,但较少探索就业地建成环境的影响。本研究以武汉市为例,通过189个轨道站点的刷卡数据识别轨道交通通勤人员并构建通勤出行链,通过梯度提升决策树(GBDT)解析职住地涉及建成环境和轨道站点的30个特征因素对通勤客流量和通勤时间的非线性影响机制。研究发现:①居住地通勤客流量表现为较集中的点状分布,就业地通勤客流量则呈现显著的“中心-外围”结构,职住地两端通勤时间的空间格局均呈中间低、外围高的分布特征;②职住地周边建成环境因素对轨道交通通勤客流量和通勤时间普遍存在非线性影响及阈值效应,整体而言居住地建成环境的相对影响程度高于就业地,但就业地“公司企业数”是影响通勤客流最重要的要素,就业地“与城市中心距离”则是影响通勤时间的首要因素;③职住地周边同一建成环境因素,对于通勤客流量和通勤时间的影响可能截然相反,这与城市轨道交通网络建设和社会实际发展状况相关。研究结果可以更好地理解职住地建成环境与轨道交通通勤行为的关联,有助于促进城市轨道交通和城市职住空间的协调发展。

关键词：职住关系建成环境城市轨道交通通勤行为梯度提升决策树武汉市

On the classification of certain real rank zero C^(*)-algebras

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Science China Mathematics 2022年第4期65卷 753-792页

作者： Qingnan An Zhichao Liu yuanhang zhang School of Mathematical Sciences Hebei Normal UniversityShijiazhuang050024China Department of Mathematics University of TorontoTorontoONM5S 2EACanada School of Mathematics Jilin UniversityChangchun130012China School of Mathematics and Statistics Northeast Normal UniversityChangchun 130024China School of Mathematical Sciences Dalian University of TechnologyDalian 116024China

In this paper,we give a classification of real rank zero C^(*)-algebras that can be expressed as inductive limits of a sequence of a subclass of Elliott-Thomsen algebras C.

关键词： Elliott-Thomsen algebra KK-theory KK-lifting mod-p K-theory classification

急性脑梗死患者血清MECP2、GFAP与病情严重程度及静脉溶栓预后的关系

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新疆医科大学学报 2024年第8期47卷 1118-1123页

作者：闫雪张帆张蕾张远航大兴区人民医院急诊科北京102600 北京大学第三医院胸外科北京100191

目的探讨急性脑梗死(Acute cerebral infarction,ACI)患者血清甲基CpG结合蛋白2(MECP2)、神经胶质纤维酸性蛋白(Glial fibrillary acidic protrein,GFAP)与病情严重程度及静脉溶栓预后的关系。方法选取本院收治的ACI患者153例作为研究对... 详细信息

目的探讨急性脑梗死(Acute cerebral infarction,ACI)患者血清甲基CpG结合蛋白2(MECP2)、神经胶质纤维酸性蛋白(Glial fibrillary acidic protrein,GFAP)与病情严重程度及静脉溶栓预后的关系。方法选取本院收治的ACI患者153例作为研究对象,纳入ACI组,选取同期体检健康人100例作为正常对照组,入组时间为2021年3月-2024年2月,检测两组血清MECP2、GFAP水平。根据美国国立卫生研究院卒中量表(NIHSS)对ACI组患者进行病情严重程度分组。所有患者行静脉溶栓后随访3个月,根据结局不同分为预后良好组(n=96)和预后不良组(n=57)。分析血清MECP2、GFAP水平与病情严重程度及预后的关系。结果与正常对照组比较,ACI组血清MECP2、GFAP水平升高,差异有统计学意义(P<0.05)。与轻度组比较,中/重度组ACI患者血清MECP2、GFAP水平明显升高(P<0.05);与中度组比较,重度组ACI患者血清MECP2、GFAP水平进一步升高(P<0.05)。血清MECP2、GFAP水平与ACI患者病情严重程度呈正相关(r=0.655、0.545,P<0.05)。与预后良好组比较,预后不良组入院NIHSS评分、高血压占比、WBC、LDL-C、hs-CRP及血清MECP2、GFAP均偏高,差异有统计学意义(P<0.05)。多因素Logistic回归模型显示,NIHSS评分和hs-CRP、MECP2、GFAP水平偏高均是导致ACI患者静脉溶栓预后不良的独立危险因素(P<0.05)。ROC曲线显示,血清MECP2、GFAP单独预测ACI患者静脉溶栓预后不良的曲线下面积(AUC)(95%CI)分别为0.736(0.658~0.804)、0.763(0.688~0.828),采用log(P)联合预测AUC(95%CI)为0.852(0.785~0.904),联合预测效能较单独预测效能更好(P<0.05)。结论血清MECP2、GFAP在ACI患者体内水平高表达,其水平变化与病情严重程度呈正相关,是ACI患者静脉溶栓预后不良的影响因素,并且两者联合预测ACI患者预后不良的效能更好。

关键词：急性脑梗死静脉溶栓甲基CpG结合蛋白2 神经胶质纤维酸性蛋白

Aerosol effects on ozone concentrations in Beijing:A model sensitivity study

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Journal of Environmental Sciences 2012年第4期24卷 645-656页

作者： Jun Xu yuanhang zhang Shaoqing Zheng Youjiang He State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing 100012 China College of Environmental Sciences Peking University Beijing 100871 China Appraisal Center for Environment ＆ Engineering State Environmental Protection Administration Beijing 100012 China

Most previous O3 simulations were based only on gaseous phase photochemistry. However, some aerosol-related processes, namely, heterogeneous reactions occurring on the aerosol surface and photolysis rate alternated by aerosol radiative influence, may affect O3 photochemistry under high aerosol loads. A three-dimensional air quality model, Models-3/Community Multi-scale Air Quality-Model of Aerosol Dynamics, Reaction, Ionization, and Dissolution, was employed to simulate the effects of the above-mentioned processes on O3 formation under typical high O3 episodes in Beijing during summer. Five heterogeneous reactions, i.e., NO2, NO3, N2O5, HO2, and O3, were individually investigated to elucidate their effects on O3 formation. The results showed that the heterogeneous reactions significantly affected O3 formation in the urban plume. NO2 heterogeneous reaction increased O3 to 90 ppb, while HO2 heterogeneous reaction decreased O3 to 33 ppb. In addition, O3 heterogeneous loss decreased O3 to 31 ppb. The effects of NO2, NO3, and N2O5 heterogeneous reactions showed opposite O3 concentration changes between the urban and extra-urban areas because of the response of the reactions to the two types of O3 formation regimes. When the aerosol radiative influence was included, the photolysis rate decreased and O3 decreased significantly to 73 ppbO3. The two aerosol-related processes should be considered in the study of O3 formation because high aerosol concentration is a ubiquitous phenomenon that affects the urbanand regional air quality in China.

关键词： aerosol heterogeneous reactions ozone radiative influence

Mode demultiplexing hybrids for mode-division multiplexing coherent receivers

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Photonics Research 2019年第8期7卷 917-925页

作者： HE WEN HUIYUAN LIU yuanhang zhang PENG zhang GUIFANG LI CREOL The College of Optics&PhotonicsUniversity of Central FloridaOrlandoFlorida32816-2700USA Changchun University of Science and Technology Changchun130012China

We propose a mode demultiplexing hybrid(MDH) that integrates mode demultiplexing, local oscillator power splitting, and optical 90-deg mixing using multi-plane light conversion(MPLC). We demonstrate the realization of a three-mode MDH using four phase plates, one more than what is required for an MPLC-based mode demultiplexer, via numerical simulations. The performance of the three-mode MDH is comparable to that of commercial single-mode 90-deg hybrids. This multiple-functionality device enables simplification of the coherent optical front end of mode-division multiplexing receivers.

关键词： domain Mode demultiplexing mode-division multiplexing coherent receivers