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Effectiveness of vegetation on phosphorus removal from reclaimed water by a subsurface flow wetland in a coastal area

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Journal of Environmental Sciences 2011年第10期23卷 1594-1599页

作者： Baoqing Shan Liang Ao Chunming hu jiayu Song Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China. E-mail： bqshan@***

This work was conducted to evaluate the effectiveness and influence factors of vegetation on phosphorus （P） removal from reclaimed water in constructed wetlands. Comparisons were conducted between one pilot scale subsurface flow wetland （P-SSFW） and two demonstration subsurface flow wetlands, which were series-wound and named as first subsurface flow wetland （F-SSFW）, and second subsurface flow wetland （S-SSFW）, respectively. The three wetlands had the same vegetation and substrate, but different pH values, total dissolved solids （TDS） and P loads. Results showed that the P content in the vegetation shoots of the F-SSFW was 2.16 rag/g, while 2.31 mg/g in the S-SSFW and 2.69 mg/g in the P-SSFW. These differences were likely caused by the higher pH and TDS in the reclaimed water. The P content also differed among the tissues of the plant, which were 5.94-6.44 mg/g, 2.20-2.77 mg/g, 1.31-1.46 mg/g and 1.53-1.88 mg/g in the flowers, leaves, stems, and roots, respectively. The greatest discrepancy was observed in the leaves, indicating that the environment of the wetlands had the greatest influence on the leaves. When the total phosphorus （TP） load was lower, the proportion of P removed by vegetation assimilation was 16.17% in the P-SSFW, 12.90% in the F-SSFW and 13.29% in the S-SSFW. However, the relative removal efficiency by vegetation among the three wetlands did not vary greatly from that observed in other studies. Moreover, the influence of pH, TDS and TP load was not as great as the influence of the vegetation species, type of substrate, influent style or climate.

关键词： wetland reclaimed water phosphorus coastal area Phragmites communis Trim

Performance of Catalytically Active Membrane Reactors with Different A/V Ratios

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Transactions of Tianjin University 2017年第6期23卷 521-529页

作者： Yang Chen Wei Jia jiayu hu Weidong Zhang Beijing Key Laboratory of Membrane Science and Technology Beijing University of Chemical TechnologyBeijing 100029China

Although the performance of membrane reactors (MR) is highly affected by the ratio of membrane area-to-reaction volume, there are few studies on this effect owing to the difficulties associated with reactor manufacture. In this study, an MR with high A/V ratio, a diameter of 35 m, and a height of 0.8 mm was fabricated. Separation performance of this MR was investigated in an n-butanol/water system. Esterification of acetic acid and n-butanol was used as the model reaction to investigate the performance of catalytically active membrane reactors (CAMR) with different A/V ratios. The reaction conversion was 38.59% in the CAMR with the high A/V ratio of 12,497/m, which was much higher than that in other CAMRs, for reaction time of 60 min and W/Vfratio of 0.093 g/mL. Excellent catalytic stability of the CAMR was confirmed by performing long-term stability experiments. © 2017 Tianjin University and Springer-Verlag GmbH Germany

关键词： Bioreactors Pervaporation

Spatial and temporal changes of glaciers and glacial lakes in the Northern Tianshan Mountains over the past 30 years

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Journal of Geographical Sciences 2024年第9期34卷 1857-1880页

作者： hu jiayu YAO Xiaojun ZHANG Cong ZHANG Yuan MA Yuxin College of Geography and Environmental Science Northwest Normal UniversityLanzhou 730070China

Glaciers and glacial lakes are very sensitive to climate change,and studying their dynamics is important for revealing changes in global *** this study,we extracted the boundaries of glaciers and glacial lakes in the Northern Tianshan Mountains based on Landsat TM/ETM+/OLI and Sentinel 2A/2B MSI remote sensing images and analyzed their dynamics and impacts over the past 30 *** findings indicate that in 2020,the Northern Tianshan region exhibited a total of 3254 glaciers,with an area of 1670.55 km^(2) and a volume of 95.69 km^(3).The corresponding numbers,areas,and volumes of glacial lakes were 281,13.23 km^(2) and 210.49×10~6 m^(3),*** the past 30 years,glaciers and glacial lakes have exhibited opposite *** former decreased by 16,332.64 km^(2)(-0.60%·a^(–1)) and 18.36 km^(3)(-0.58%·a^(–1)),respectively,and the latter increased by 56 and2.48 km^(2)(0.82%·a^(–1)) and 38.88×10~6 m^(3)(0.79%·a^(–1)),***,different glacier termination types cause differences in the glacier retreat ***-terminated glaciers retreated faster than land-terminated glaciers,and the type of glacier termination has a greater effect on the retreat rate than the size of the glacial area.

关键词： glacier glacial lake climate change Northern Tianshan Mountains

High-throughput first-principle prediction of collinear magnetic topological materials

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npj Computational Materials 2022年第1期8卷 2490-2497页

作者： Yunlong Su jiayu hu Xiaochan Cai Wujun Shi Yunyouyou Xia Yuanfeng Xu Xuguang Xu Yulin Chen Gang Li School of Physical Science and Technology ShanghaiTech University201210ShanghaiChina Center for Transformative Science ShanghaiTech University201210ShanghaiChina Shanghai High Repetition Rate XFEL and Extreme Light Facility(SHINE) ShanghaiTech University201210ShanghaiChina ShanghaiTech Laboratory for Topological Physics ShanghaiTech University201210ShanghaiChina Center for Correlated Matter and School of Physics Zhejiang University310058HangzhouChina Department of Physics Princeton UniversityPrincetonNJUSA Department of Physics Clarendon LaboratoryUniversity of OxfordParks RoadOxfordOX13PUUK

The success of topological band theory and symmetry-based topological classification significantly advances our understanding of the Berry *** on the critical concept of topological obstruction,efficient theoretical frameworks,including topological quantum chemistry and symmetry indicator theory,were developed,making a massive characterization of real materials ***,the classification of magnetic materials often involves the complexity of their unknown magnetic structures,which are often hard to know from experiments,thus,hindering the topological *** this paper,we design a high-throughput workflow to classify magnetic topological materials by automating the search for collinear magnetic structures and the characterization of their topological *** computed 1049 chosen transition-metal compounds(TMCs)without oxygen and identified 64 topological insulators and 53 semimetals,which become 73 and 26 when U correction is further *** to the lack of magnetic structure information from experiments,our high-throughput predictions provide insightful reference results and make the step toward a complete diagnosis of magnetic topological materials.

关键词： materials topological symmetry

Fabric computing: Concepts, opportunities, and challenges

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The Innovation 2022年第6期3卷 67-76页

作者： Min Chen Jia Liu Pan Li Hamid Gharavi Yixue Hao Jingyu Ouyang jiayu hu Long hu Chong Hou Iztok humar Lei Wei Guang-Zhong Yang Guangming Tao Wuhan National Laboratory for Optoelectronics and School of Computer Science and TechnologyHuazhong University of Science and TechnologyWuhan 430074China National Institute of Standards and Technology(NIST) GaithersburgMD 20899-8920USA School of Optics and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Faculty of Electrical Engineering University of LjubljanaTrzaska cesta 251000 LjubljanaSlovenia School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore 639798Singapore Medical Robotics Institute Shanghai Jiao Tong UniversityShanghai 200030China State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

With the advent of the Internet of Everything,people can easily interact with their environments *** idea of pervasive computing is becoming a reality,but due to the inconvenience of carrying silicon-based entities and a lack of fine-grained sensing capabilities for human-computer interaction,it is difficult to ensure comfort,esthetics,and privacy in smart *** by the rapid developments in intelligent fabric technology in the post-Moore era,we propose a novel computing approach that creates a paradigm shift driven by fabric computing and advocate a new concept of non-chip sensing in living *** discuss the core notion and benefits of fabric computing,including its implementation,challenges,and future research opportunities.

关键词： computing computer smart

基于空间自回归和地理加权回归模型的佛山市中心城区河网水系演变驱动分析

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水文 2019年第2期39卷 7-13页

作者：胡家昱刘丙军中山大学地理科学与规划学院广东广州510275 华南地区水循环与水安全广东省普通高校重点实验室广东广州510275 广东省华南地区水安全调控工程技术研究中心广东广州510275

为定量探究城市河流变化驱动成因,以2005～2010年佛山市中心城区为例,分析了河网水系演变及其驱动因子,根据河网水系变化与其驱动因子间一对多的映射关系,借助空间自回归和地理加权回归模型,分别从整体和局部分析了两者间的统计关系,结... 详细信息

为定量探究城市河流变化驱动成因,以2005～2010年佛山市中心城区为例,分析了河网水系演变及其驱动因子,根据河网水系变化与其驱动因子间一对多的映射关系,借助空间自回归和地理加权回归模型,分别从整体和局部分析了两者间的统计关系,结果表明:(1)末级河流长度减少量占各级河流总变化量约92.3%,变化最为显著,而城镇用地对水田、工业用地对水域的侵占以及农业活动则是影响末级河流的主要驱动因子;(2)整体来看,末级河流受建设用地扩张,尤其是工业用地扩张的负面影响程度最大;局部来看,各驱动因子的负面影响程度在不同空间位置上存在差异,以水田-城镇用地因子为例,其在罗村、老城区和桂城的交界区域以及南庄、罗村和老城区的交界区域负面影响程度较大;(3)空间自回归模型对区域河网水系变化与其驱动因子间的关系有整体、直观的把握,地理加权回归模型则能够描述驱动因子影响的空间非平稳性,有利于获取局部信息,结合两种模型的特点能够更加全面地刻画河网水系演变的驱动成因。

关键词：驱动分析河网水系演变空间自回归模型地理加权回归模型末级河流

可见光诱导有机膦促进脱氧官能化反应研究进展

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有机化学 2023年第12期43卷 4036-4056页

作者：汤娟胡家榆祝志强蒲守智江西科技师范大学江西省有机功能分子重点实验室南昌330038 江西师范大学江西省绿色化学重点实验室南昌330022 东华理工大学江西省合成化学重点实验室南昌330013

脱氧偶联反应是有机化学中的重要合成转化,有机膦促进的有机合成反应近年来发展迅速,三苯基膦及其衍生物是有机膦中重要的一类,其在有机合成反应中不仅可以作为配体,而且可以用作脱氧促进剂.最近几年,可见光诱导有机膦促进脱氧偶联反应... 详细信息

脱氧偶联反应是有机化学中的重要合成转化,有机膦促进的有机合成反应近年来发展迅速,三苯基膦及其衍生物是有机膦中重要的一类,其在有机合成反应中不仅可以作为配体,而且可以用作脱氧促进剂.最近几年,可见光诱导有机膦促进脱氧偶联反应受到研究者们广泛关注,该类型反应利用有机膦在可见光下经单电子转移后与含氧有机分子形成P—O中间体,随后经脱氧得到高活性自由基物种,并最终完成脱氧偶联,反应底物无需预先官能团化且条件温和.系统地概述了近年来光氧化还原诱导下有机膦促进含氧有机分子脱氧官能化反应的研究进展.

关键词：可见光有机膦脱氧自由基官能化

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利用外部电阻法进行瞬态热测试的方法研究

电子元件与材料 2018年第7期37卷 35-39页

作者：赵青胡家渝西南电子技术研究所四川成都610036

在瞬态热测试方法中,由于T3ster测试仪本机的驱动能力有限,不能直接对大功率半导体器件进行驱动;如果采用小功率半导体器件测量类似模块壳体等大尺寸结构热阻时,由于其散热好,所测得的温差小,信噪比低,瞬态热测试的精度及分辨率均下降... 详细信息

在瞬态热测试方法中,由于T3ster测试仪本机的驱动能力有限,不能直接对大功率半导体器件进行驱动;如果采用小功率半导体器件测量类似模块壳体等大尺寸结构热阻时,由于其散热好,所测得的温差小,信噪比低,瞬态热测试的精度及分辨率均下降。本文采用外部电阻和热电偶形成加热和温度测试系统,利用电子开关,配合T3ster的控制信号实现了电阻的大功率加热,并完成温度信号采集。实验表明,其测试误差与理论计算值在10%以内,完全满足工程测试需求,且成本低廉。

关键词：瞬态热测试方法热阻结构函数热测试热阻网络反卷积

Wearable and interactive multicolored photochromic fiber display

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Light(Science & Applications) 2024年第3期13卷 454-465页

作者： Pan Li Yuwei Wang Xiaoxian He Yuyang Cui Jingyu Ouyang Ju Ouyang Zicheng He jiayu hu Xiaojuan Liu Hang Wei Yu Wang Xiaoling Lu Qian Ji Xinyuan Cai Li Liu Chong Hou Ning Zhou Shaowu Pan Xiangru Wang huamin Zhou Cheng-Wei Qiu Yan-Qing Lu Guangming Tao State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and Engineering and Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074China Key Laboratory of Vascular Aging(huST) Ministry of EducationWuhan 430030China School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore National Laboratory of Solid State Microstructures Key Laboratory of Intelligent Optical Sensing and ManipulationCollege of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023China School of Performing Arts Wuhan Conservatory of MusicWuhan 430060China School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China School of Architecture and Urban Planning Huazhong University of Science and TechnologyWuhan 430074China School of Fashion Beijing Institute of Fashion TechnologyBeijing 100029China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Tongji Medical College Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Endowing flexible and adaptable fiber devices with light-emitting capabilities has the potential to revolutionize the current design philosophy of intelligent,wearable interactive ***,significant challenges remain in developing fiber devices when it comes to achieving uniform and customizable light effects while utilizing lightweight ***,we introduce a mass-produced,wearable,and interactive photochromic fiber that provides uniform multicolored light *** designed independent waveguides inside the fiber to maintain total internal reflection of light as it traverses the *** impact of excessive light leakage on the overall illuminance can be reduced by utilizing the saturable absorption effect of fluorescent materials to ensure light emission uniformity along the transmission *** addition,we coupled various fluorescent composite materials inside the fiber to achieve artificially controllable spectral radiation of multiple color systems in a single *** prepared fibers on mass-produced kilometer-long using the thermal drawing *** fibers can be directly integrated into daily wearable devices or clothing in various patterns and combined with other signal input components to control and display patterns as *** work provides a new perspective and inspiration to the existing field of fiber display interaction,paving the way for future human–machine integration.

关键词： fiber interactive colored