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A Radiative-Cooling Hierarchical Aligned Porous Poly(vinylidene fluoride)Film by Freeze-Thaw-Promoted Nonsolvent-Induced Phase Separation

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Chinese Journal of Polymer Science 2024年第7期42卷 976-983,I0009页

作者： Yiting Zhang Jiahui Sun yufeng wang Yunchen Wu Chun Huang Chao Zhang Tianxi Liu Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material EngineeringJiangnan UniversityWuxi214122China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China

Passive daytime radiative cooling(PDRC)is an innovative and sustainable cooling technology that holds immense potential for addressing the energy *** the numerous reports on radiative coolers,the design of a straightforward,efficient,and readily producible system remains a ***,we present the development of a hierarchical aligned porous poly(vinylidene fluoride)(HAP-PVDF)film through a freeze-thaw-promoted nonsolvent-induced phase separation *** film features oriented microporous arrays in conjunction with random nanopores,enabling efficient radiative cooling performance under direct sunlight *** incorporation of both micro-and nano-pores in the HAP-PVDF film results in a remarkable solar reflectance of 97%and a sufficiently high infrared thermal emissivity of 96%,facilitating sub-environmental cooling at 18.3℃ on sunny days and 13.1℃ on cloudy ***,the HAP-PVDF film also exhibits exceptional flexibility and *** calculations further confirm a radiative cooling power of 94.8 W·m^(-2)under a solar intensity of 1000W·m^(-2),demonstrating a performance comparable to the majority of reported radiative coolers.

关键词： Daytime radiative cooling Hierarchical porosity PVDF porous film Thermal insulation Nonsolvent-induced phase separation

Artificial intelligence optimization and controllable slow-release iron sulfide realizes efficient separation of copper and arsenic in strongly acidic wastewater

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Journal of Environmental Sciences 2024年第5期139卷 293-307页

作者： Xingfei Zhang Chenglong Lu Jia Tian Liqiang Zeng yufeng wang Wei Sun Haisheng Han Jianhua Kang School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China Centre for Mined Land Rehabilitation Sustainable Minerals InstituteThe University of QueenslandBrisbane 4072Australia

Iron sulfide(FeS)is a promising material for separating copper and arsenic from strongly acidic wastewater due to its S^(2-)slow-release ***,uncertainties arise because of the constant changes in wastewater composition,affecting the selection of operating parameters and FeS *** this study,the aging method was first used to prepare various controllable FeS nanoparticles to weaken the arsenic removal ability without affecting the copper *** experiments were conducted,and the results identified the Cu/As ratio,H_(2)SO_(4) concentration,and FeS dosage as the three main factors influencing the separation *** backpropagation artificial neural network(BP-ANN)model was established to determine the relationship between the influencing factors and the separation *** correlation coefficient(R)of overall model was 0.9923 after optimizing using genetic algorithm(GA).The BP-GA model was also solved using GA under specific constraints,predicting the best solution for the separation process in *** predicted results show that the high temperature and long aging time of FeS were necessary to gain high separation efficiency,and the maximum separation factor can reached 1,*** study provides a suitable sulfurizing material and a set of methods and models with robust flexibility that can successfully predict the separation efficiency of copper and arsenic from highly acidic environments.

关键词： FeS nanoparticles Aging Sulfide precipitation Orthogonal experiment Artificial neural network Prediction

Highly Porous Yet Transparent Mechanically Flexible Aerogels Realizing Solar-Thermal Regulatory Cooling

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Nano-Micro Letters 2024年第7期16卷 231-243页

作者： Meng Lian Wei Ding Song Liu yufeng wang Tianyi Zhu Yue-EMiao Chao Zhang Tianxi Liu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620People’s Republic of China Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122People’s Republic of China

The demand for highly porous yet transparent aerogels with mechanical flexibility and solar-thermal dual-regulation for energy-saving windows is significant but ***,a delaminated aerogel film(DAF)is fabricated through filtration-induced delaminated gelation and ambient *** delaminated gelation process involves the assembly of fluorinated cellulose nanofiber(FCNF)at the solid-liquid interface between the filter and the filtrate during filtration,resulting in the formation of lamellar FCNF hydrogels with strong intra-plane and weak interlayer hydrogen *** exchanging the solvents from water to hexane,the hydrogen bonding in the FCNF hydrogel is further enhanced,enabling the formation of the DAF with intra-layer mesopores upon ambient *** resulting aerogel film is lightweight and ultra-flexible,which pos-sesses desirable properties of high visible-light transmittance(91.0%),low thermal conductivity(33 mW m^(-1) K^(-1)),and high atmospheric-window emissivity(90.1%).Furthermore,the DAF exhibits reduced surface energy and exceptional hydrophobicity due to the presence of fluorine-containing groups,enhancing its durability and UV ***,the DAF has demonstrated its potential as solar-thermal regulatory cooling window materials capable of simultaneously providing indoor lighting,thermal insulation,and daytime radiative cooling under direct ***,the enclosed space protected by the DAF exhibits a temperature reduction of 2.6℃ compared to that shielded by conventional architectural glass.

关键词： Transparent aerogel Cellulose nanofiber aerogel Delaminated gelation Thermal insulation Passive daytime radiative cooling

The Magnetic Longitudinal (P-) Wave’s Propagation and Energy Models Underlying the Mechanisms of Its Capacity to Absorb Free Energy

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Journal of Power and Energy Engineering 2024年第7期12卷 39-62页

作者： Jianzhong Jiang yufeng wang Department of Mechanical Engineering Jiangnan University Wuxi China Wuxi Hongyu Automobile Parts Manufacturing Co. Ltd. Wuxi China

The longitudinal wave term within Faraday’s law of electromagnetic induction (Faraday’s law) underwent recovery to ensure its suitability for theoretical derivation of the equation governing longitudinal electromagnetic (LEM) waves. The revised Maxwell’s equations include the crucial parameters being the attenuation time constants of magnetic vortex potential and electric vortex potential generated by external electromagnetic field within the propagation medium. Specific expressions for them are obtained through theoretical analysis. Subsequently, a model for propagating magnetic P-wave generated by the superposition of a left-handed photo and a right-handed photon in a vacuum is formulated based on reevaluated total current law and revised Faraday’s law, covering wave equations, energy equation, as well as propagation mode involving mutual induction and conversion between scalar magnetic field and vortex electric field. Furthermore, through theoretical derivations centered around magnetic P-wave, evidence was presented regarding its ability to absorb huge free energy through the entangled interaction between zero-point vacuum energy field and the torsion field produced by the vortex electric field.

关键词： QED (Quantum Electrodynamics) Energy Wave and TEM (Transverse Electromagnetic) Wave Magnetic P-Wave Modified Faraday’s Law of Electromagnetic Induction Electric/Magnetic Vortex Potential Zero-Point Vacuum Energy

Facies-controlled prediction of dolomite reservoirs in the Middle Permian Qixia Formation in Shuangyushi,northwestern Sichuan Basin

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Energy Geoscience

Energy Geoscience 2024年第2期5卷 21-30页

作者： Chao Zheng Benjian Zhang Rongrong Li Hong Yin yufeng wang Xin Hu Xiao Chen Ran Liu Qi Zeng Zhiyun Sun Rui Zhang Xingyu Zhang Weidong Yin Kun Zhang Exploration and Development Research Institute PetroChina Southwest Oil&Gas Field CompanyChengduSichuan610500China Northwest Sichuan Gas Branch PetroChina Southwest Oil&Gas Field CompanyJiangyouSichuan621709China PetroChina Southwest Oil&Gas Field Company ChengduSichuan610500China School of Geosciences and Technology Southwest Petroleum UniversityChengduSichuan610500China

The Middle Permian Qixia Formation in the Shuangyushi area,northwestern Sichuan Basin,develops shoal-facies dolomite *** pinpoint promising reservoirs in the Qixia Formation,deep thin shoal-facies dolomite reservoirs were predicted using the techniques of pre-stack Kirchhoff-Q compensation for absorption,inverse Q filtering,low-to high-frequency compensation,forward modeling,and facies-controlled seismic meme *** results are obtained in six ***,the dolomite reservoirs mainly exist in the middle and lower parts of the second member of Qixia Formation(Qi2 Member),which coincide with the zones shoal cores are ***,the forward modeling shows that the trough energy at the top and bottom of shoal core increases with increasing shoal-core thickness,and weak peak reflections are associated in the middle of shoal ***,five types of seismic waveform are identified through waveform analysis of seismic ***-Ⅰ and Type-Ⅱ waveforms correspond to promising facies(shoal core microfacies).Fourth,vertically,two packages of thin dolomite reservoirs turn up in the sedimentary cycle of intraplatform shoal in the Qi2 Member,and the lower package is superior to the upper package in dolomite thickness,scale and lateral ***,in plane,significantly controlled by sedimentary facies,dolomite reservoirs laterally distribute with consistent thickness in shoal cores at topographical highs and extend toward the ***,the promising prospects are the zones with thick dolomite reservoirs and superimposition of horstegraben structural traps.

关键词： Reservoir prediction Seismic facies Shoal-facies dolomite Qixia formation Shuangyushi Sichuan basin

激光遥感斜程能见度探测技术研究进展(特邀)

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光学学报 2024年第6期44卷 1-11页

作者：王玉峰华灯鑫西安理工大学机械与精密仪器工程学院激光雷达大气遥感研究中心陕西西安710048

以斜程能见度精确探测为目标,综述了激光遥感在斜程能见度测量中的主要技术及其研究进展,分析了现有探测技术在斜程能见度测量中的不足与局限性,重点介绍了一种新型的激光雷达结合辐射传输模式的斜程能见度测量方法,剖析了基于拉曼-米... 详细信息

以斜程能见度精确探测为目标,综述了激光遥感在斜程能见度测量中的主要技术及其研究进展,分析了现有探测技术在斜程能见度测量中的不足与局限性,重点介绍了一种新型的激光雷达结合辐射传输模式的斜程能见度测量方法,剖析了基于拉曼-米散射激光雷达的气溶胶精细探测技术、基于辐射传输模式的大气散射辐射亮度解析方法以及大气散射辐射亮度校正的斜程能见度测量技术与应用案例,突破了当前白天斜程能见度测不准的技术瓶颈。最后,展望了激光遥感技术在全球斜程能见度测量中的应用潜力。

关键词：大气光学激光遥感斜程能见度辐射传输模式散射辐射亮度

地方政府融资平台分类转型的现实问题与应对策略

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经济纵横 2024年第7期 113-119页

作者：王玉凤审计署审计科研所北京100086

地方政府融资平台分类转型是党中央、国务院的一项重要决策部署,是地方政府推动融资平台改革、化解地方政府隐性债务的重要途径。目前,多地陆续明确“先分类后转型”的思路,部分城投公司退出政府融资平台,合并整合愈加频繁,但分类转型... 详细信息

地方政府融资平台分类转型是党中央、国务院的一项重要决策部署,是地方政府推动融资平台改革、化解地方政府隐性债务的重要途径。目前,多地陆续明确“先分类后转型”的思路,部分城投公司退出政府融资平台,合并整合愈加频繁,但分类转型过程中需要注意融资平台转型发展目标不明确、公司治理效能低下“、假退出”掩盖风险等突出问题。为此,要结合地方政府债务管理、国企改革和城市发展需求,明确融资平台转型发展的目标;确立融资平台转型为为地方政府发展规划和目标服务的“新型国有企业”的定位;厘清政企权责关系,强化独立法人地位;加强监管,防范整合风险。

关键词：地方政府融资平台分类转型政府债务城投公司

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苯乙烯生产工艺的节能优化和经济分析

化学工程 2024年第7期52卷 88-94页

作者：王玉枫中石化上海工程有限公司上海200120

在中石化自主研发的苯乙烯生产工艺中,乙苯脱氢反应需要加入大量过热蒸汽作为脱氢介质,水蒸气和乙苯流量的比值是影响脱氢反应的一个重要因素。随着低水比催化剂工业应用取得进展,可以减少进入反应器的蒸汽量,而降低水比的关键就在于减... 详细信息

在中石化自主研发的苯乙烯生产工艺中,乙苯脱氢反应需要加入大量过热蒸汽作为脱氢介质,水蒸气和乙苯流量的比值是影响脱氢反应的一个重要因素。随着低水比催化剂工业应用取得进展,可以减少进入反应器的蒸汽量,而降低水比的关键就在于减少乙苯/苯乙烯塔顶冷凝器共沸蒸出的乙苯和蒸汽的量。控制恒沸蒸发量后,会导致乙苯/苯乙烯塔塔顶物料携带的热量不能完全回收。为合理利用这部分热量,对原工艺流程进行优化、热量进行耦合。此次节能优化主要涉及9台换热器,其中2台为新增。优化过程中还降低了预分塔塔压,提高了尾气压缩机出口温度。经过优化,可减少综合能耗11.364 kg标油(以1 t苯乙烯计),静态投资回收期约为2个月。

关键词：苯乙烯乙苯脱氢尾气压缩机降膜再沸器节能优化

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基于元学习的小样本遥感图像目标检测

北京航空航天大学学报 2024年第8期50卷 2503-2513页

作者：李红光王玉峰杨丽春北京航空航天大学无人系统研究院北京100191 北京航空航天大学交通科学与工程学院北京100191

面向小样本条件下的遥感图像目标检测任务,提出一种基于元学习的小样本遥感图像目标检测算法。针对遥感图像中目标尺度变化大、小样本条件下目标与背景易混淆的问题,在特征提取部分将单尺度重加权拓展为多尺度重加权模块,充分引入支持... 详细信息

面向小样本条件下的遥感图像目标检测任务,提出一种基于元学习的小样本遥感图像目标检测算法。针对遥感图像中目标尺度变化大、小样本条件下目标与背景易混淆的问题,在特征提取部分将单尺度重加权拓展为多尺度重加权模块,充分引入支持样本的先验知识以适应不同目标的尺度变化;为解决遥感图像目标类间相似性和类内差异性的问题,利用目标对于场景的依赖性设计了场景修正模块,对检出目标类别进行修正,并引入边际损失对特征空间内不同目标的特征分布进行约束。实验结果表明:所提算法在10样本任务设定上获得了较高的检测性能,在NWPU VHR-10和DIOR数据集新类别上的平均精度(mAP)分别达到了64.18%和37.27%。

关键词：小样本学习元学习多尺度重加权场景修正遥感图像目标检测