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新能源崛起对中国新能源产业战略的影响

中国软科学 2024年第2期 1-8页

作者：张娜米倩玉邓嘉纬赵晓军北京交通大学北京产业安全与发展研究基地北京100044 北京交通大学经济管理学院北京100044 同济大学经济与管理学院上海200092

全球新能源加速发展的时代已经来到,传统能源消费的绝对量、占比和成本将开始下降,围绕能源而开展的竞争将逐步转移到新能源领域。新能源的崛起将导致能源生产国与消费国之间、发达国家与发展中国家之间、发达国家和发展中国家内部出现... 详细信息

全球新能源加速发展的时代已经来到,传统能源消费的绝对量、占比和成本将开始下降,围绕能源而开展的竞争将逐步转移到新能源领域。新能源的崛起将导致能源生产国与消费国之间、发达国家与发展中国家之间、发达国家和发展中国家内部出现利益分化和政治关系重组。中国要利用在新能源设备制造业领域的绝对优势,选择适合的产业战略,促进新能源产业发展,积极推动全球碳减排,帮助包括中国在内的发展中国家实现能源自给和能源清洁化,并降低工业化和现代化的成本。

关键词：新能源地缘政治产业安全产业战略

机械振动对磨粒流抛光TC4钛合金加工效率及质量的影响

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制造技术与机床 2024年第5期 167-172页

作者：邓佳伟王奔张棋徐仁杰沈阳航空航天大学机电工程学院辽宁沈阳110136

为进一步提高磨粒流抛光TC4钛合金的加工效率及质量,提出机械振动辅助磨粒流抛光方法,进行磨粒流抛光TC4钛合金试验,探究机械振动对工件的材料去除效率、表面粗糙度和表面形貌的影响,分析其变化规律。结果表明:在抛光过程中,对工件施加... 详细信息

为进一步提高磨粒流抛光TC4钛合金的加工效率及质量,提出机械振动辅助磨粒流抛光方法,进行磨粒流抛光TC4钛合金试验,探究机械振动对工件的材料去除效率、表面粗糙度和表面形貌的影响,分析其变化规律。结果表明:在抛光过程中,对工件施加机械振动辅助,抛光液“剪切增稠”效应增强,磨粒去除工件表面材料的能力增加;相比于无机械振动,有机械振动条件下工件的材料去除效率提高19.90%,表面粗糙度降低19.58%,工件表面划痕、凹陷等加工缺陷减少,提高了表面质量,为实际的生产加工积累经验和提供基础数据。

关键词：机械振动辅助磨粒流抛光 TC4钛合金加工效率剪切增稠

秦岭北麓典型流域径流对气候和土地利用变化的响应——以灞河流域为例

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生态环境学报 2024年第5期33卷 802-811页

作者：李慧邓佳伟李亚鑫母滢琦西安科技大学地质与环境学院陕西西安710054

气候和土地利用变化对径流变化的影响显著,为探究两者影响下秦岭北麓典型城市流域径流的变化特征及响应机制,选择灞河流域为研究对象,根据灞河流域1960-2018年水文气象数据和1985-2018年土地利用,采用滑动T检验、TFPWMK秩次检验、连续... 详细信息

气候和土地利用变化对径流变化的影响显著,为探究两者影响下秦岭北麓典型城市流域径流的变化特征及响应机制,选择灞河流域为研究对象,根据灞河流域1960-2018年水文气象数据和1985-2018年土地利用,采用滑动T检验、TFPWMK秩次检验、连续小波变换(CWT)、交叉小波变换(XWT)、小波相干分析(WTC)等方法对流域水文、气象及下垫面要素的变化特征及流域径流与气象要素的共振周期、相关性与时滞性进行了研究;并结合SWAT模型,通过设置多种变化情景探明流域径流对气候和土地利用变化的响应机制。结果表明:1)1960-2018年灞河流域径流量呈显著下降趋势,1985-2018年灞河流域城镇建设用地增加了近3倍,耕地面积呈减少趋势;2)径流与气象因子在时频域中均存在不同尺度的共振周期和时滞效应,降水和径流在高能区存在5个显著的共振周期,气温和径流在高能区存在3个显著的共振周期,且径流滞后于气象因子的变化;3)年均径流量与降水量呈正相关,与气温呈负相关,流域径流变化主要由降水主导,且在降水增加情景下,径流对降水变化的敏感性高于降水减少情景;耕地全部转化为林地会导致年径流量减少2.58%,草地全部转化为林地会使年径流量增加0.822%,耕地全部转为城镇建设用地使年径流量增加40.8%;4)气候和土地利用变化共同作用下,灞河流域径流变幅为-0.870 m^(3)∙s^(-1),其中气候变化引起的径流量变幅为-1.04 m^(3)∙s^(-1),土地利用变化引起的变幅为0.170 m^(3)∙s^(-1),相比土地利用变化,气候变化对于灞河流域径流变化的影响更显著。

关键词：气候变化土地利用变化交叉小波变换小波相干径流 SWAT模型灞河流域

Colour Variation Minimization Retinex Decomposition and Enhancement with a Multi-Branch Decomposition Network

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Chinese Journal of Electronics 2023年第4期32卷 908-919页

作者： deng jiawei YU Zhenming PANG Guangyao Guangxi Key Laboratory of Machine Vision and Intelligent Control Wuzhou University School of Information and Communication Guilin University of Electronic Technology

This paper proposes a colour variation minimization retinex decomposition and enhancement with a multi-branch decomposition network(CvmD-net)to remove single image darkness. The network overcomes the problem that retinex deep learning model relies on matching bright images to process dark images. Specifically, our method takes two stages to light up the darkness in initial images: image decomposition and brightness optimization. We propose an input constant feature prior mechanism(ICFP) based on reflection constant features. The mechanism extracts structure and colour from the input images and constrains the reflected images output from the decomposition model to reduce color distortion and artifacts. The noise amplification during decomposition is addressed by a multi-branch decomposition network. Sub-networks with different structures are employed to focus on different prediction tasks. This paper proposes a reference mechanism for input brightness. This mechanism optimizes the output brightness distribution by calculating the reference brightness of the dark *** results on two benchmark datasets, namely,LOL and ZeroDCE, demonstrate that the proposed method can better balance dense noise interference and colour restoration. For the evaluation on real images, we collect Skynet images at night to verify the performance of the proposed approach. Compared with the state-of-the-art non-reference retinex decomposition-enhancement models,this paper has the best brightness optimization.

关键词： Reflectivity Image color analysis Brightness Interference Feature extraction Minimization Reflection

Molecular insights on Ca^(2+)/Na+separation via graphene-based nanopores:The role of electrostatic interactions to ionic dehydration

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Chinese Journal of Chemical Engineering 2022年第1期35卷 220-229页

作者： Yumeng Zhang Yingying Zhang Xueling Pan Yao Qin jiawei deng Shanshan Wang Qingwei Gao Yudan Zhu Zhuhong Yang Xiaohua Lu College of Chemical Engineering State Key Laboratory of Materials-oriented Chemical EngineeringNanjing Tech UniversityNanjing 211816China College of Chemical Engineering Nanjing Forestry UniversityNanjing 210037China School of Chemical Engineering State Key Laboratory of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China

Ca^(2+)/Na+separation is a common problem in industrial applications,biological and medical ***,Ca^(2+)and Na+have similar ionic radii and hydration radii,thus Ca^(2+)/Na+separation is *** by biological channels,group modification is one of the effective methods to improve the separation *** this work,molecular dynamics simulations were performed to investigate the effects of different functional groups(COO,NH3+)on the separation performance of Ca^(2+)and Na+through graphene nanopores under an electric *** pristine graphene nanopore was used for *** showed that three types of nanopores preferred Ca^(2+)to Na+,and Ca^(2+)/Na+selectivity followed the order of GE-COO(4.06)>GE(1.85)>GE-NH3+(1.63).Detailed analysis of ionic hydration microstructure shows that different nanopores result in different hydration factors for the second hydration layer of Ca^(2+)and the first layer of Na+.Such different hydration factors corresponding to the dehydration ability can effectively evaluate the separation *** addition,the breaking of hydrogen bonds between water molecules due to electrostatic effects can directly affect the dehydration ***,the electrostatic effect generated by group modification will affect the ionic hydration microstructure,thus reflecting the differences in dehydration *** in turn affects the permeable and separation performance of *** results of this work provide perceptive guidelines for the application of graphene-based membranes in ion separation.

关键词： Separation Microstructure Molecular simulation Modified graphene nanopores Metal-ions Nanoconfinement

Non-conjugated terpolymer acceptors for highly efficient and stable lager-area all-polymer solar cells

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Journal of Energy Chemistry 2022年第8期31卷 631-638,I0017页

作者： Jiabin Liu Jinliang Liu jiawei deng Bin Huang Jiyeon Oh Lin Zhao Liang Liu Changduk Yang Dong Chen Feiyan Wu Lie Chen College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry(IPEC) Nanchang UniversityNanchang 330031JiangxiChina Institute of Advanced Scientific Research(iASR)/Key Laboratory of Functional Organic Small Molecules for Ministry of Education Jiangxi Normal UniversityNanchang 330022JiangxiChina Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and Technology 156 Ke Jia AvenueGanzhou 341000JiangxiChina Department of Energy Engineering School of Energy and Chemical EngineeringPerovtronics Research CenterLow Dimensional Carbon Materials CenterUlsan National Institute of Science and Technology(UNIST)50 UNIST-gilUlju-gunUlsan 44919South Korea

All-polymer solar cells(all-PSCs)have made significant progress recently,but few studies have been conducted to investigate the lab-to-manufacturing translation from the spin-coating method to the printing ***,the random copolymerization method and non-conjugated backbone approach are integrated to manipulate the morphology and photoelectric properties of the active layer for large-area printed all-PSCs.A series of non-conjugated terpolymer acceptors PYSe-TC_(6)T(x)(x=5,10,and 20,refers to the molar ratio of TC_(6)T unit)are developed by covalently introducing non-conjugated unit TC_(6)T into the PYSe host bipolymer by random *** spin-coated PYSe-TC_(6)T(10)-based all-PSC demonstrates the best power conversion efficiency(PCE)of 13.54%,superior to the PYSe-based one(12.45%).More intriguingly,morphological studies reveal that a combination of the random polymerization and non-conjugated backbone strategy can effectively prevent the active layer from overaggregation and improve the film quality during the printing process,thereby minimizing the efficiency and technology gap between spin-coated small-area devices and blade-coated large-area *** directly using the same preparation condition of spin-coating,the blade-coated small-area(0.04 cm^(2))delivers a PCE of 12.83%and the large-area(1.21 cm^(2))device achieves a PCE of 11.96%with a small PCE *** PCE value and PCE loss are one of the most outstanding performances of the bladecoated *** findings reveal that a combination of the non-conjugated flexible backbone with random copolymerization to develop non-conjugated terpolymers is an attractive design concept to smoothly realize the lab-to-manufacturing translation.

关键词： All-polymer Non-conjugated Large area Blade-coating Lab-to-manufacturing translation

Multifunctional SnO_(2) QDs/MXene Heterostructures as Laminar Interlayers for Improved Polysulfide Conversion and Lithium Plating Behavior

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Nano-Micro Letters 2024年第11期16卷 156-169页

作者： Shungui deng Weiwei Sun jiawei Tang Mohammad Jafarpour Frank Nüesch Jakob Heier Chuanfang Zhang College of Materials Science and Engineering Sichuan UniversityChengdu 610065People’s Republic of China Laboratory for Functional Polymers Swiss Federal Laboratories for Materials Science and Technology(EMPA)Überlandstrasse 1298600 DübendorfSwitzerland Institute of Materials Science and Engineering Ecole Polytechnique Fédérale de Lausanne(EPFL)Station 121015 LausanneSwitzerland Key Laboratory of Quantum Materials and Devices of Ministry of Education School of PhysicsSoutheast UniversityNanjing 211189People’s Republic of China SEU‑FEI Nano‑Pico Center Key Laboratory of MEMS of Ministry of EducationSoutheast UniversityNanjing 210096People’s Republic of China

Poor cycling stability in lithium–sulfur(Li–S)batteries necessitates advanced electrode/electrolyte design and innovative interlayer *** catalysis has emerged as a promising approach,leveraging the adsorption and catalytic performance on lithium polysulfides(LiPSs)to inhibit LiPSs shuttling and improve redox *** this study,we report an ultrathin and laminar SnO_(2)@MXene heterostructure interlayer(SnO_(2)@MX),where SnO_(2) quantum dots(QDs)are uniformly distributed across the MXene *** combined structure of SnO_(2) QDs and MXene,along with the creation of numerous active boundary sites with coordination electron environments,plays a critical role in manipulating the catalytic kinetics of sulfur *** Li–S cell with the SnO_(2)@MX-modified separator not only demonstrates superior electrochemical performance compared to cells with a bare separator but also induces homogeneous Li deposition during *** a result,an areal capacity of 7.6 mAh cm^(-2) under a sulfur loading of 7.5 mg cm^(-2) and a high stability over 500 cycles are *** work demonstrates a feasible strategy of utilizing a laminar separator interlayer for advanced Li–S batteries awaiting commercialization and may shed light on the understanding of heterostructure catalysis with enhanced reaction kinetics.

关键词： Lithium-sulfur battery Heterogeneous catalysis Heterostructure Redox kinetics Lithium dendrites

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聚氨酯化三聚氰胺改性醛酮树脂制备及其性能

当代化工研究 2024年第19期 101-103页

作者：张棋颖谢高艺邓佳伟马春平李杨欧德培五邑大学环境与化学工程学院广东529020 贵州理工学院化学工程学院贵州550003 五邑大学纺织科学与工程学院广东529020 贵州理工学院材料与能源工程学院贵州550003 奋腾精化科技(佛山)有限公司广东528100

通过三聚氰胺、环己酮、甲醛反应制备了三聚氰胺改性醛酮树脂,并利用异佛尔酮二异氰酸酯将其聚氨酯化,再分散于水中制得聚氨酯乳液。利用添加了三聚氰胺改性醛酮树脂聚氨酯乳液的色浆对织物进行印染,表现出了优异的染色与耐皂洗等性能。

关键词：酮醛树脂三聚氰胺聚氨酯乳液高羟值

Investigations of Water Flow Behaviors Induced by Local Temperature Variations through a Single Rough Fracture for the Enhanced Geothermal Systems

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Journal of Thermal Science 2024年第3期33卷 1055-1064页

作者： LI jiawei YE Lin Department of Energy and Power Engineering Tsinghua UniversityBeijing100084China School of Power and Energy Northwestern Polytechnical UniversityXi’an710072China

In recent years,Enhanced Geothermal System(EGS)technologies have been applied to the geothermal resources production in the Hot Dry Rock(HDR).The core of EGS technologies is to adopt hydraulic fracturing in the reservoir to create a connected network of discrete fractures with the consideration of water as a working fluid for hydraulic fracturing and heat *** paper investigates the characteristics of water flow behaviors through a single rough fracture under different temperature and pressure conditions.A single fracture model with rough fracture surfaces is constructed and then characterized,and influences of the anisotropic factor on the average tortuosity and frictional resistance coefficient of water flow through a single fracture with rough surfaces have been compared and *** consideration of other impacting factors(temperature,pressure,fracture roughness),the impact of mass flow rate has also been *** simulation results present that changes of average tortuosity for water flow through a single rough facture are mainly affected by *** can be observed that higher temperature leads to larger average tortuosity but the frictional resistance coefficient shows an opposite *** for pressure conditions,it is found that effects of pressure on average tortuosity and frictional resistance coefficient is very small,which can be neglected under high pressure ***,the average tortuosity shows a progressively linear relationship with the mass flow *** the contrary,the frictional resistance coefficient has a negative relationship with the mass flow *** is revealed that when the mass flow rate reaches a critical point,the influences of temperature on the frictional resistance coefficient will be *** of single rough fractures with different anisotropic factors show that values of average tortuosity and frictional resistance coefficient have positive relationships with the increase

关键词： single rough fracture tortuosity frictional resistance enhanced geothermal system