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Study on adverse effects of groundwater level rising induced by land creation engineering in hilly and gully area of the Loess Plateau

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Journal of Mountain Science 2019年第12期16卷 2739-2753页

作者： DUAN Xu DONG Qi YE Wan-jun zhou jia-lin OH Erwin School of Architectural and Civil Engineering Xi'an University of Science and TechnologyXi'anShaanxi 710054China Shaanxi Science&Technology Holding Group Co. Ltd.Xi'anShaanxi 710054China State Key Laboratoiij for Strength and Vibration of Mechanical Structures Xi'an Jiaotong UniversityXi'an 710049China School of Engineering Griffith UniversityGold Coast 7222Australia

Land creation projects have been implemented in China to expand urban space in mountainous *** addition to the predictable settlement brought about by filling construction,varying degrees of land subsidence and engineering failures have a demonstrated relationship to groundwater level fluctuation induced by land creation *** this work,we adopted a typical large-scale land creation project,Yan’an New City in Shaanxi province,West China,as our study *** to conducting the main experiment,preliminary field investigation and groundwater level monitoring were conducted to determine the groundwater fluctuation trend induced by land creation *** a blind drainage system was implemented,the depth aspect of groundwater level changes after large-scale land creation still needed to be *** study the degree of impact and the settlement mechanism induced by the rising groundwater level,we conducted a Water Immersion Test(WIT)in a typical land creation site for 107 *** rising groundwater level was simulated by injecting water from the bottom of the filling *** the WIT,the soil water content,surface subsidence,and internal settlement of soil at different depths were *** subsidence development could be categorized into four stages during the water level *** second stage,which is defined as the point when the groundwater level rises to 10 m,marked the critical point in the ***,it was ascertained that the local settlement in regions that were originally composed of steep slopes is larger than that in originally flat *** addition,ground cracks and sinkholes in the study area were inspected;and it was determined that they would become new channels that would accelerate water infiltration and exacerbate the *** on the results from our field investigation and testing,several suggestions are proposed for land creation projects to mitigate issues associated with construc

关键词： Water immersion test Land creation engineering Loess plateau Groundwater Subsidence

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Prussian Blue Analogue‑Templated Nanocomposites for Alkali‑Ion Batteries:Progress and Perspective

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Nano-Micro Letters 2025年第1期17卷 216-261页

作者： jian‑En zhou Yilin Li Xiaoming lin jiaye Ye Key Laboratory of Theoretical Chemistry of Environment Ministry of EducationSchool of ChemistrySouth China Normal UniversityGuangzhou 510006People’s Republic of China School of Chemistry and Physics Faculty of ScienceQueensland University of Technology2 George StreetBrisbaneQLD 4000Australia Centre for Materials Science Queensland University of Technology2 George StreetBrisbaneQLD 4000Australia

Lithium-ion batteries(LIBs)have dominated the portable electronic and electrochemical energy markets since their commercialisation,whose high cost and lithium scarcity have prompted the development of other alkali-ion batteries(AIBs)including sodium-ion batteries(SIBs)and potassium-ion batteries(PIBs).Owing to larger ion sizes of Na^(+)and K^(+)compared with Li^(+),nanocomposites with excellent crystallinity orientation and well-developed porosity show unprecedented potential for advanced lithium/sodium/potassium *** enticing open rigid framework structures,Prussian blue analogues(PBAs)remain promising self-sacrificial templates for the preparation of various nanocomposites,whose appeal originates from the well-retained porous structures and exceptional electrochemical activities after thermal *** review focuses on the recent progress of PBA-derived nanocomposites from their fabrication,lithium/sodium/potassium storage mechanism,and applications in AIBs(LIBs,SIBs,and PIBs).To distinguish various PBA derivatives,the working mechanism and applications of PBA-templated metal oxides,metal chalcogenides,metal phosphides,and other nanocomposites are systematically evaluated,facilitating the establishment of a structure–activity correlation for these *** on the fruitful achievements of PBA-derived nanocomposites,perspectives for their future development are envisioned,aiming to narrow down the gap between laboratory study and industrial reality.

关键词： Prussian blue analogues Self-sacrificial template Lithium-ion batteries Sodium-ion batteries Potassium-ion batteries

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16.48% Efficient solution-processed CIGS solar cells with crystal growth and defects engineering enabled by Ag doping strategy

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Journal of Energy Chemistry 2025年第1期100卷 59-65页

作者： Mengyu Xu Shaocong Yan Ting Liang jia jia Shengjie Yuan Dongxing Kou Zhengji zhou Wenhui zhou Yafang Qi Yuena Meng Litao Han Sixin Wu Key Laboratory for Special Functional Materials of MOE National & Local Joint Engineering Research Centre for High-efficiency Display and Lighting Technology School of Nanoscience and Materials Engineering Henan University

Solution-processed Cu（In,Ga）Se2（CIGS） solar cells suffer from serious carrier recombination and power conversion efficiency（PCE） loss because of the poor film properties and easy formation of ***, we propose Ag&Se co-selenization strategy to enhance the crystallization and passivate harmful defects of the CIGS films. The formation of Ag-Se phase during the selenization process enables the formation of large grains and suppresses the deep level defects. It is found that Ag doping can enlarge the depletion region width, lower the Urbach energy and prolong the carrier lifetime. As a result, a champion solution-processed CIGS solar cell presents a high efficiency of 16.48% with the highly improved opencircuit voltage（VOC） of 662 m V and fill factor（FF） of 75.8%. This work provides an efficient strategy to prepare high quality solution-processed CIGS films for high-performance CIGS solar cells.

关键词： Cell engineering

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Viscosity and structure relationship with equimolar substitution of CaO with MgO in the CaO–MgO–Al_(2)O_(3)–SiO_(2)slag melts

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 70-79页

作者： Yong Hou Shuo Zhang Jie Dang jia Guo Hanghang zhou Xuewei Lü College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials Chongqing UniversityChongqing 400044China

Currently,the Al_(2)O_(3)content in the high-alumina slag systems within blast furnaces is generally limited to 16wt%–18.5wt%,making it challenging to overcome this *** most studies that concentrated on managing the MgO/Al_(2)O_(3)ratio or basicity,this paper explored the effect of equimolar substitution of MgO for CaO on the viscosity and structure of a high-alumina CaO-MgO-Al_(2)O_(3)-SiO_(2)slag system,providing theoretical guidance and data to facilitate the application of high-alumina *** results revealed that the viscosity first decreased and then increased with higher MgO substitution,reaching a minimum at 15mol%MgO *** transform infrared spectroscopy(FTIR)results found that the depths of the troughs representing[SiO_(4)]tetrahedra,[AlO_(4)]tetrahedra,and Si-O-Al bending became progressively deeper with increased MgO *** of the Raman spectra showed that the average number of bridging oxygens per Si atom and the X_(Q^(3))/X_(Q^(2))(X_(Q^(i))is the molar fraction of Q^(i) unit,and i is the number of bridging oxygens in a[SiO_(4)]tetrahedral unit)ratio increased from 2.30 and 1.02 to 2.52 and 2.14,respectively,indicating a progressive polymerization of the silicate structure.X-ray photoelectron spectroscopy(XPS)results highlighted that non-bridging oxygen content decreased from 77.97mol% to 63.41mol% with increasing MgO concentration,whereas bridging oxygen and free oxygen contents *** analysis demonstrated a gradual increase in the polymerization degree of the tetrahedral structure with the increase in MgO ***,bond strength is another important factor affecting the slag *** occurrence of a viscosity minimum can be attributed to the complex evolution of bond strengths of non-bridging oxygens generated during depolymerization of the[SiO_(4)]and[AlO_(4)]tetrahedral structures by CaO and MgO.

关键词： aluminosilicate viscosity structure spectroscopy

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北京市通勤人流的总体特征及典型区分析

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人文地理 2023年第4期38卷 81-91,101页

作者：周佳林王德新一线城市研究所上海200041 同济大学建筑与城市规划学院上海200092

基于手机信令数据,从职住分布、通勤流向、距离时耗分布三方面总结北京市通勤空间格局的整体特征,进而划定具有代表性的职住类型区开展对比分析。研究发现,北京的居住或就业密度并非完全由内向外递减,而是以高密度居住环带和点状就业中... 详细信息

基于手机信令数据,从职住分布、通勤流向、距离时耗分布三方面总结北京市通勤空间格局的整体特征,进而划定具有代表性的职住类型区开展对比分析。研究发现,北京的居住或就业密度并非完全由内向外递减,而是以高密度居住环带和点状就业中心呈现;通勤流向上形成“昌平—中关村”和“通州—CBD”两条长距离通勤带;由通州、大兴、昌平三个新城流向中心城区的通勤人数较高,而亦庄、通州和顺义也吸引了一部分中心城区居民反向通勤;西五环内和北五环外的的居民单位通勤距离耗时更多,表明此地居民面临更为严峻的通勤交通状况。此外,通过对比五种居住区与四种就业区中的人口通勤特征,亦发现了不同职住类型区域的通勤分布模式差异。

关键词：手机信令数据通勤分布居住区就业区北京

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Integration of Electrical Properties and Polarization Loss Modulation on Atomic Fe–N‑RGO for Boosting Electromagnetic Wave Absorption

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Nano-Micro Letters 2025年第2期17卷 517-532页

作者： Kaili Zhang Yuefeng Yan Zhen Wang Guansheng Ma Dechang jia Xiaoxiao Huang Yu zhou State Key Laboratory of Precision Welding&Joining of Materials and Structures Harbin Institute of TechnologyHarbin 150001People’s Republic of China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001People’s Republic of China MIIT Key Laboratory of Advanced Structural‑Functional Integration Materials&Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001People’s Republic of China

Developing effective strategies to regulate graphene’s conduction loss and polarization has become a key to expanding its application in the electromagnetic wave absorption(EMWA)*** on the unique energy band structure of graphene,regulating its bandgap and electrical properties by introducing heteroatoms is considered a feasible ***,metal-nitrogen doping reduced graphene oxide(M–N-RGO)was prepared by embedding a series of single metal atoms M–N_(4) sites(M=Mn,Fe,Co,Ni,Cu,Zn,Nb,Cd,and Sn)in RGO using an N-coordination atom-assisted *** composites had adjustable conductivity and polarization to optimize dielectric loss and impedance matching for efficient EMWA *** results showed that the minimum reflection loss(RL_(min))of Fe–N-RGO reaches−74.05 dB(2.0 mm)and the maximum effective absorption bandwidth(EAB_(max))is 7.05 GHz(1.89 mm)even with a low filler loading of only 1 wt%.Combined with X-ray absorption spectra(XAFS),atomic force microscopy,and density functional theory calculation analysis,the Fe–N_(4) can be used as the polarization center to increase dipole polarization,interface polarization and defect-induced polarization due to d-p orbital hybridization and structural ***,electron migration within the Fe further leads to conduction loss,thereby synergistically promoting energy *** study demonstrates the effectiveness of metal-nitrogen doping in regulating the graphene′s dielectric properties,which provides an important basis for further investigation of the loss mechanism.

关键词： Electromagnetic wave absorption Fe-N-RGO Dipole polarization Conduction loss Impedance matching

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Interannual variability of boreal summer intraseasonal oscillation over the northwestern Pacific influenced by the Pacific Meridional Mode

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 6-11页

作者： Haoyu zhou Pang-Chi Hsu lin Chen Yitian Qian Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environmental Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science and TechnologyNanjingChina

During the boreal summer,intraseasonal oscillations exhibit significant interannual variations in intensity over two key regions:the central-western equatorial Pacific(5°S-5°N,150°E-150°W)and the subtropical Northwestern Pacific(10°-20°N,130°E-175°W).The former is well-documented and considered to be influenced by the ENSO,while the latter has received comparatively less attention and is likely influenced by the Pacific Meridional Mode(PMM),as suggested by partial correlation analysis *** elucidate the physical processes responsible for the enhanced(weakened)intraseasonal convection over the subtropical northwestern Pacific during warm(cold)PMM years,the authors employed a moisture budget *** findings reveal that during warm PMM years,there is an increase in summer-mean moisture over the subtropical northwestern *** increase interacts with intensified vertical motion perturbations in the region,leading to greater vertical moisture advection in the lower troposphere and consequently resulting in convective *** a process is pivotal in amplifying intraseasonal convection *** observational findings were further verified by model experiments forced by PMM-like sea surface temperature patterns.

关键词： Boreal summer intraseasonal oscillation Interannual variability Pacific Meridional Mode Moisture budget analysis

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Fine-tuning the spatial allocation of phytohormones for smart canopy, smart breeding, and smart agriculture

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Science China Life Sciences 2025年第1期 309-310页

作者： Tao zhou lin Li National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural University HuBei HongShan Laboratory

The dual challenges of global climate change and population growth have increased demand for higher crop yields per unit area. The innovative technology of smart agriculture aims to synergize breeding, cultivation, and production through the application of biological and informatics technologies. Historically, the “Green Revolution” introduced semidwarf varieties of certain key crops by utilizing mutations affecting gibberellin pathways, which significantly increased planting densities and yields.

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基于极限学习机的非线性内模控制

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电子科技大学学报 2016年第1期45卷 96-101页

作者：唐贤伦周家林张娜刘庆重庆邮电大学工业物联网与网络化控制教育部重点实验室重庆南岸区400065

针对非线性的内模控制的逆模难以求解的问题,该文提出一种基于改进极限学习机(MELM)的非线性内模控制方法。在基本的极限学习机模型中加入L1和L2范数罚函数,然后将改进极限学习机算法用于建立非线性系统的内模型和逆模型。仿真实验中,选... 详细信息

针对非线性的内模控制的逆模难以求解的问题,该文提出一种基于改进极限学习机(MELM)的非线性内模控制方法。在基本的极限学习机模型中加入L1和L2范数罚函数,然后将改进极限学习机算法用于建立非线性系统的内模型和逆模型。仿真实验中,选取4种典型信号进行跟踪,并检验了系统的抗干扰能力和系统参数发生变化时的鲁棒性,通过将MELM和最小二乘支持向量机(SVM)以及极限学习机算法进行对比,表明基于MELM的内模控制方法对非线性系统具有更好的控制性能、较强的抗干扰能力和鲁棒性能。

关键词：极限学习机内模控制 L1范数罚函数 L2范数罚函数

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基于算法正当性的话语建构与传播权力重构研究

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现代传播（中国传媒大学学报） 2019年第1期41卷 30-36,41页

作者：张志安周嘉琳中山大学传播与设计学院广东省舆情大数据分析与仿真重点实验室香港中文大学新闻传播学院

以今日头条算法争议事件为例,考察以人民网为代表的党媒、以都市报为代表的市场化媒体、以今日头条为代表的聚合类平台媒体公司、以腾讯和阿里巴巴等为代表的互联网巨头、以新浪和网易等为代表的门户网站等五类行动主体,针对算法正当性... 详细信息

以今日头条算法争议事件为例,考察以人民网为代表的党媒、以都市报为代表的市场化媒体、以今日头条为代表的聚合类平台媒体公司、以腾讯和阿里巴巴等为代表的互联网巨头、以新浪和网易等为代表的门户网站等五类行动主体,针对算法正当性进行话语建构或消解的过程,由此把握技术进场对既有传播权力格局的影响以及主流意识形态传播面临的焦虑。研究发现,平台媒体、互联网巨头、门户网站主要从绩效正当性、规范正当性构建算法话语的正当性,而党媒和市场化媒体从价值正当性、规制正当性消解算法的权威。同时,市场化媒体在融合转型过程中不断加强技术采纳,呈现出规制正当性与绩效正当性话语交织的特征。总体上,这五类媒体行动者之间的话语互动浮现出同构、对抗、规训、合谋等四种关系。算法争议的原因表面上是技术正当和人本理性的冲突,实质上则是意识形态与技术平台围绕传播效果展开争夺,而且政治权力可以在价值层面有效驯化技术或对技术进行矫正,并在话语公开规训的过程中得到强化。此外,平台媒体通过向主流媒体反哺技术和共享数据资源,增加政治资本和争取专业媒体的认同,努力巩固自身运营的正当性根基。

关键词：算法平台媒体技术逻辑传播权力正当性话语

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