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Geochemical Characteristics and Development Significances of Constant and Trace Elements from Coalbed Methane Co-Produced Water:A Case Study of the Shizhuangnan Block,the Southern Qinshui Basin

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Journal of Earth Science 2024年第1期35卷 51-61页

作者： Yang li Shuheng Tang Jian Chen Songhang Zhang Zhaodong Xi Key Laboratory of Universities in Anhui Province for Prevention of Mine Geological Disasters Anhui University of Science and TechnologyHuainan 232001China School of Earth and Environment Anhui University of Science and TechnologyHuainan 232001China National Key Laboratory of Petroleum Resources and Engineering China University of PetroleumBeijing 102249China School of Energy Resource China University of GeosciencesBeijing 100083China Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Enrichment Mechanism Ministry of EducationBeijing 100083China Key Laboratory of Strategy Evaluation for Shale Gas Ministry of Land and ResourcesBeijing 100083China

As an unconventional natural gas resource,coalbed methane(CBM)development releases a large amount of CBM wells co-produced *** characteristics of the co-produced water provide an essential foundation for the production dynamics of CBM reservoirs if the impacts of fracturing fluids and other aquifers can be *** the Shizhuangnan Block of the southern Qinshui Basin,constant and trace elements in CBM co-produced water from the wellheads were collected and determined,which is applied to assess water source,fracturing fluid effect,and CBM *** on principle component analysis and hierarchical clustering analysis,the water samples are divided into four *** suggests that different characteristics affected by water-rock interaction,reservoir environment,aquifer recharge,and hydraulic fracturing result in the various ratios of Na^(+)/Cl^(-),alkalinity(HCO_(3)^(-)+CO_(3)^(2-))/Cl^(-)and other specific ***,Cl^(-)is selected as a dividing line for complete fracturing fluid flow back,associated with organic-bound chlorine complexes in the original coal seam *** to constant elements,there is a significant correlation between li and Sr concentrations and CBM productivity,so templates regarding trace elements can be used to distinguish various sources of the co-produced water.

关键词： coalbad methane CBM co-produced water hydraulic fracturing Qinshui Basin

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数字能力对农户家庭发展韧性的影响

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农业经济与管理 2024年第4期 49-61页

作者：田杰李梦晗黄迈重庆工商大学金融学院重庆400067 中国农业银行战略规划部北京100005

在数字乡村建设的大背景下,农户数字能力的提升对拓宽农户增收渠道、增强农户内生发展动力具有重要意义。利用中国家庭金融调查(CHFS)数据,深入考察了数字能力在农户家庭发展韧性中发挥的作用及其内在作用机制。研究发现:数字能力有效... 详细信息

在数字乡村建设的大背景下,农户数字能力的提升对拓宽农户增收渠道、增强农户内生发展动力具有重要意义。利用中国家庭金融调查(CHFS)数据,深入考察了数字能力在农户家庭发展韧性中发挥的作用及其内在作用机制。研究发现:数字能力有效提高了农户家庭发展韧性,在充分考虑潜在的内生性问题并经一系列稳健性检验后,结论依旧稳健有效。进一步分析表明:数字能力对西部地区、人均收入水平较高、传统人力资本较低、中青年家庭等特征的农户家庭发展韧性增强效果更好。数字能力主要通过鼓励农户创业、深化农户参与金融市场的程度两个路径增强农户家庭发展韧性。建议加快推动数字乡村建设,健全农户数字能力培育机制,鼓励农户创业并营造良好的创业环境,推动农户积极参与金融市场,充分发挥数字能力对农户家庭发展韧性的促进作用。

关键词：数字能力农户家庭发展韧性农户创业金融市场参与

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Advantageous properties of halide perovskite quantum dots towards energy-efficient sustainable applications

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Green Energy & Environment 2024年第6期9卷 949-965页

作者： Qian Zhao Shuo Wang Young-Hoon Kim Shekhar Mondal qingqing Miao Simiao li Danya liu Miao Wang Yaxin Zhai Jianbo Gao Abhijit Hazarika Guo-Ran li School of Materials Science and Engineering Nankai UniversityTianjin300350China Department of Energy Engineering Hanyang UniversitySeoul04763Republic of Korea Polymers and Functional Materials Division CSIR-Indian Institute of Chemical TechnologyUppal RoadTarnakHyderabad500007India Institute of Process Engineering Chinese Academy of SciencesBeijing100190China Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of PhysicsHunan Normal UniversityChangshHunan410081China Department of Chemistry Brock University1812 Sir Isaac WaySt CatharinesOntarioCanada

As lead halide perovskite(LHP)semiconductors have shown tremendous promise in many application fields,and particularly made strong impact in the solar photovoltaic area,low dimensional quantum dot forms of these perovskites are showing the potential to make distinct marks in the fields of electronics,optoelectronics and *** so-called perovskite quantum dots(PQDs)not only possess the most important features of LHP materials,i.e.,the unusual high defect tolerance,but also demonstrate clear quantum size effects,along with exhibiting desirable optoelectronic properties such as near perfect photoluminescent quantum yield,multiple exciton generation and slow hot-carrier ***,we review the advantageous properties of these nanoscale perovskites and survey the prospects for diverse applications which include lightemitting devices,solar cells,photocatalysts,lasers,detectors and memristors,emphasizing the distinct superiorities as well as the challenges.

关键词： Perovskite quantum dot light-emitting Detector Laser Solar cell

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我国高职院校科教融汇发展现状、问题及对策——基于大数据分析的视角

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职业技术教育 2024年第22期45卷 60-67页

作者：许建领卿中全袁礼深圳职业技术大学深圳518055 深圳职业技术大学技术与职业教育研究所

科教融汇有利于推进教育、科技、人才一体化发展,是职业教育高质量发展并服务教育强国战略的关键路径。探讨我国高职院校科教融汇现状,有助于从宏观上把握各地区科教融汇水平及发展规律,对于提高科研质量、推进科技创新具有重要意义。... 详细信息

科教融汇有利于推进教育、科技、人才一体化发展,是职业教育高质量发展并服务教育强国战略的关键路径。探讨我国高职院校科教融汇现状,有助于从宏观上把握各地区科教融汇水平及发展规律,对于提高科研质量、推进科技创新具有重要意义。通过大数据分析及调研发现,我国各地区科教融汇发展程度不均衡,科研服务产业和教学能力不足,缺乏完善的制度保障,高职院校科教融汇整体上处于初级阶段。区域产业基础是影响科教融汇的重要因素,但并不完全决定科教融汇发展水平,院校办学理念、制度环境、专业结构等因素同样非常关键。为推进教育科技人才一体化发展,应在科教融汇治理体系、科教融汇院校特色、科教融汇评价机制、校企信息共享平台等方面改革创新。

关键词：高职院校科教融汇科技创新大数据分析科教融汇评价

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Boron-doped carbon dots:Doping strategies,performance effects,and applications

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Chinese Chemical Letters 2024年第7期35卷 100-106页

作者： Qiang Fu Shouhong Sun Kangzhi Lu Ning li Zhanhua Dong College of Engineering Qufu Normal UniversityRizhao 276826China

Due to their superior fluorescence,phosphorescence,and catalytic capabilities,carbon dots(CDs),an emerging class of fluorescent carbon nanomaterials,have a wide range of potential *** properties of CDs have recently been controlled extensively by heteroatom *** atoms have been effectively doped into the structure of CDs due to their similar size to carbon atoms and excellent electron-absorbing ability to further improve the performance of *** this review,we summarize the research progress of boron-doped CDs in recent years from the aspects of doping strategies,effects of boron doping on different performances of CDs and *** from the two aspects of single boron doping and boron and other atom co-doping,from different precursor materials to different synthesis methods,the doping strategies of boron-doped CDs are reviewed in ***,the effects of boron doping on the fluorescence,phosphorescence and catalytic performance of CDs and applications of boron-doped CDs in optical sensors,information encryption and anti-counterfeiting are ***,we further provide a prospect towards the future development of boron-doped CDs.

关键词： Carbon dots Boron-doped Luminescent material Doping strategies Performance effects

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面向边缘智能的神经网络模型生成与部署研究

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计算机工程 2024年第8期50卷 1-12页

作者：谭郁松李恬张钰森国防科技大学计算机学院湖南长沙410073

随着移动计算、第五代移动通信技术(5G)以及物联网(IoT)技术的不断演进,各类终端设备的数量呈现指数级增长。这种激增的终端设备连接到网络产生了巨大的数据流,对于需要实时处理和快速响应用户任务的需求提出了新的挑战。尤其是在这些... 详细信息

随着移动计算、第五代移动通信技术(5G)以及物联网(IoT)技术的不断演进,各类终端设备的数量呈现指数级增长。这种激增的终端设备连接到网络产生了巨大的数据流,对于需要实时处理和快速响应用户任务的需求提出了新的挑战。尤其是在这些海量数据中,半结构化和非结构化数据所占比例较大,这使得神经网络因其独特的优势而得到了广泛应用。为了提高数据处理能力和推理精度,神经网络模型会被设计得非常复杂,其存储和运行均需要消耗大量的计算资源。然而,边缘设备通常只配置有限的计算资源,无法满足存储和运行复杂神经网络模型的需求,需要借助云计算中心来完成这些任务。这种云协同会引发响应延时和增加网络带宽消耗,并带来用户隐私数据泄露等潜在风险。为了解决这些问题,提出一种面向边缘智能的神经网络模型快速生成与自动化部署(NGD)方法,根据边缘设备的硬件配置和承载的具体计算任务需求,生成与其匹配的神经网络模型,并将其快速部署在目标设备上,实现设备本地推理。在3种典型的硬件平台上的神经网络模型生成与部署实验结果表明,NGD方法能够高效地为资源受限的边缘设备生成匹配的神经网络模型,并快速地将其部署在设备上进行推理任务。

关键词：边缘智能设备端推理模型生成自动化部署边缘设备

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Characterization of physicochemical and immunogenic properties of allergenic proteins altered by food processing:a review

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Food Science and Human Wellness 2024年第3期13卷 1135-1151页

作者： Enning Zhou Qiangqiang li Dan Zhu Gang Chen liming Wu Institute of Apicultural Research Chinese Academy of Agricultural SciencesBeijing 100093China Department of Food Science University of OtagoDunedin 9016New Zealand School of Food and Health Beijing Technology and Business UniversityBeijing 100048China

Food allergens are mainly naturally-occurring proteins with immunoglobulin E(IgE)-binding *** the structural and immunogenic characteristics of allergenic proteins is essential in assessing whether and how food processing techniques reduce *** here discuss the impacts of food processing technologies on the modification of physicochemical,structural,and immunogenic properties of allergenic *** techniques for characterizing changes in these properties of food allergens are *** processing helps to reduce allergenicity by aggregating or denaturing proteins,which masks,modifies,or destroys antigenic epitopes,whereas,it cannot eliminate allergenicity completely,and sometimes even improves allergenicity by exposing new ***,most food processing techniques have been tested on purified food allergens rather than food products due to potential interference of other food *** provide guidance for further development of processing operations that can decrease the allergenicity of allergenic food proteins without negatively impacting the nutritional profile.

关键词： Food allergens Protein structural characterization Immunogenicity evaluation Food processing modification

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Automatic recognition of landslides based on YOLOv7 and attention mechanism

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Journal of Mountain Science 2024年第8期21卷 2681-2695页

作者： SONG Yewei GUO Jie WU Gaofeng MA Fengshan li Fangrui Key Laboratory of Shale Gas and Geoengineering Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Innovation Academy for Earth Sciences Chinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China

Landslide disasters comprise the majority of geological incidents on slopes,posing severe threats to the safety of human lives and property while exerting a significant impact on the geological *** rapid identification of landslides is important for disaster prevention and control;however,currently,landslide identification relies mainly on the manual interpretation of remote sensing *** interpretation and feature recognition methods are time-consuming,labor-intensive,and challenging when confronted with complex ***,automatic landslide recognition has emerged as a pivotal avenue for future *** this study,a dataset comprising 2000 landslide images was constructed using open-source remote sensing images and *** YOLOv7 model was enhanced using data augmentation algorithms and attention *** optimization models were formulated to realize automatic landslide *** findings demonstrate the commendable performance of the optimized model in automatic landslide recognition,achieving a peak accuracy of 95.92%.Subsequently,the optimized model was applied to regional landslide identification,co-seismic landslide identification,and landslide recognition at various scales,all of which showed robust recognition ***,the model exhibits limitations in detecting small targets,indicating areas for refining the deep-learning *** results of this research offer valuable technical support for the swift identification,prevention,and mitigation of landslide disasters.

关键词： Deep learning Landslide detection Natural disasters Attention mechanism Remote sensing

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Hexagonal boron nitride based slippery liquid infused porous surface with anti-corrosion, anti-contaminant and anti-icing properties for protecting magnesium alloy

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Chinese Chemical Letters 2024年第4期35卷 532-538页

作者： Wenhao Yan Shuaiya Xue Xuerui Zhao Wei Zhang Jian li Key Laboratory of Eco-Functional Polymer Materials of the Ministry of Education College of Chemistry and Chemical EngineeringNorthwest Normal UniversityLanzhou 730070China

In an era where the concept of green development is deeply rooted, magnesium(Mg) alloy as a light metal has a long-term development prospect in the process of energy saving, emission reduction and environmental improvement. However, anti-corrosion performance of Mg alloy is poor due to the high chemical activity and low equilibrium potential, which limits the development of Mg alloy ***, three-dimensional mesopore hollow polypyrrole spheres(MHPS) were prepared, and the MHPS was inserted into the middle of the stacked hexagon boron nitride(h-BN) lamellae, which allowed the hBN to be separated forming a further composite with abundant pore structure. Subsequently, the MHPS/hBN-OH composite was uniformly sprayed on the Mg alloy surface via simple spraying method to form the superhydrophobic surface(SHS). Finally, the slippery liquid infused porous surface(SliPS) was successfully fabricated by applying drops of silicone lubricant on the superhydrophobic coating surface. After a series of characterization and testing, the results showed that the stacking of h-BN lamellae was significantly reduced after h-BN was successfully embedded by MHPS. In addition, the fabricated SliPS have excellent self-cleaning, mechanical stability, anti-icing and anti-corrosion properties. Therefore, the method of embedding polymer microspheres not only offers a new strategy for h-BN exfoliation, but also the successful prepared SliPS largely retards the corrosion of Mg alloy while providing new ideas for the development of SliPS.

关键词： Anti-corrosion Mg alloy Hexagon boron nitride Polypyrrole SliPS

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Experimental Investigation on Solution Regeneration Performance and Coefficients in Full-Open System for Heat and Water Recovery of Flue Gas

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Journal of Thermal Science 2024年第3期33卷 1094-1108页

作者： WEI Hongyang HUANG Shifang MA Yuxin CHEN Bo SUN li ZHANG Xiaosong School of Energy and Environment Southeast UniversityNanjing210096China MOE Engineering Research Center for Building Energy Equipment&Environment Southeast UniversityNanjing210096China Jiangsu Frontier Electric Technology Co. LtdNanjing211106China

The recovery of heat and water from low-grade flue gas is of considerable importance for energy conservation and environmental *** the full-open absorption heat pump shows promise as a means of achieving heat and water recovery,the lack of research on heat and mass transfer performance of open-type solution evaporation regeneration represents a significant impediment to its design and *** paper experimentally investigates the regeneration performance of an open-type spaying tower equipped with ceramic structured *** different regeneration modes are proposed,namely ambient air receiver mode and flue gas receiver mode,to utilize air or low-grade flue gas as a driving *** impact of different input parameters on the regeneration characteristics,including heat transfer capacity,water removal rate,thermal efficiency,and humidity effectiveness,are *** findings indicate that the enhancement of regeneration can be achieved through the increase of solution flow rate,solution temperature,and flue gas flow rate in both regeneration ***,high solution concentration and flue gas humidity ratio can weaken water removal rates and reduce thermal *** the regeneration of CaCl_(2)-H_(2)O with a concentration of55%,flue gas around 200℃with a humidity ratio below 44 g/kg can successfully drive the solution regeneration *** the solution concentration or flue gas humidity ratio continues to rise,additional energy is necessary for ***,the coupled heat and mass transfer coefficients are fitted,which can contribute to the design and optimization of the open-type regenerator.

关键词： heat and water recovery solution regeneration flue gas regeneration performance coefficient

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