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Petroleum Science 2024年第2期21卷 1320-1332页

作者： jian-yu He Fei Xie dan Wang Guang-Xin Liu ming Wu yue Qin College of Petroleum engineering Liaoning Petrochemical UniversityFushun113001LiaoningChina Key Laboratory of Oil and Gas Storage and Transportation Technology in Liaoning Province Fushun113001LiaoningChina State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China PipeChina West East Gas Pipeline Company Shanghai200120China

Magnetic field and microorganisms are important factors influencing the stress corrosion cracking(SCC)of buried oil and gas pipelines. Once SCC occurs in buried pipelines, it will cause serious hazards to the soil environment. The SCC behavior of X80 pipeline steel under the magnetic field and sulfate-reducing bacteria(SRB) environment was investigated by immersion tests, electrochemical tests, and slow strain rate tensile(SSRT) tests. The results showed that the corrosion and SCC sensitivity of X80 steel decreased with increasing the magnetic field strength in the sterile environment. The SCC sensitivity was higher in the biotic environment inoculated with SRB, but it also decreased with increasing magnetic field strength, which was due to the magnetic field reduces microbial activity and promotes the formation of dense film layer. This work provided theoretical guidance on the prevention of SCC in pipeline steel under magnetic field and SRB coexistence.

关键词： Magnetic field Sulfate-reducing bacteria Film layer Stress corrosion cracking Oil and gas pipelines

Boost VS_(2) electrochemical reactive kinetics by regulating crystallographic planes and coupling carbon matrix for high performance sodium-ion storage

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Rare Metals 2024年第1期43卷 98-112页

作者： Min Zeng ming-Shan Wang Lin Chen En-Zhi Li Zhen-Liang Yang dan Zhou Hai-jiao Xie Jun-Chen Chen Zhi-yuan Ma Bing-Shu Guo Bo yu Xing Li school of New Energy and Materials Southwest Petroleum UniversityChengdu 610500China Energy Storage Research Institute Southwest Petroleum UniversityChengdu 610500China Institute of Materials China Academy of Engineering PhysicsMianyang 621908China Beijing Advanced Innovation Center for Materials Genome engineering University of Science and TechnologyBeijingBeijing 100083China Hangzhou Yanqu Information Technology Co. Ltd.Hangzhou 310003China

Vanadium disulfide(VS_(2)) as a typical two-dimensional transition metal chalcogenide has excellent competitiveness for sodium-ion storage due to its wide layer spacing(0.575 nm),high theoretical capacity of 932mAh·g^(-1) originating from multi-electron electrochemical ***,continuous sodiation process accompanied by crystal structural evolution and collapse cause rapid capacity ***,novel few-layer VS_(2)nanosheets with open(001) crystal planes are in-situ constructed on reduced graphene oxide to solve these issues mentioned *** indicates that few-layer VS_(2)provides more Na^(+) storage activity due to the low Na^(+)surface migration energy barrier on exposed crystal(001)*** flexible and high electronic conductivity of carbon matrix also effectively builds multi-level buffer structure and electron transport kinetics to boost the Na^(+)insertion/conversion reactive activity on VS_(2) as well as Na^(+) pseudocapacitance storage kinetics on edges and defects of nano *** coupling effects result in high rate capability and long cycling stability as a battery/capacitor *** delivers conspicuous high energy density of 81 and 40 Wh·kg^(-1) at power density of 118 and 10,286W·kg^(-1),as well as 80% energy retention rate after 5000cycles,confirming its great application potential in sodiumbased storage devices.

关键词： Vanadium disulfide Reduced graphene oxide Anode Sodium-ion battery Sodium-ion capacitor

Si-doped Li_(6)PS_(5)I with enhanced conductivity enables superior performance for all-solid-state lithium batteries

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Chinese Chemical Letters 2024年第10期35卷 479-484页

作者： Liang ming dan Liu Qiyue Luo Chaochao Wei Chen Liu Ziling jiang Zhongkai Wu Lin Li Long zhang shijie Cheng Chuang yu State Key Laboratory of Advanced Electromagnetic engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Scienceand TechnologyWuhan430074China school of Chemistry and Chemical engineering Huazhong University of Science and TechnologyWuhan 430074China State Grid Hubei Electric Power Research Institute Wuhan 430077China College of Physics and Energy Fujian Normal UniversityFuzhou 350117China

Lithium argyrodites Li_(6)PS_(5)X(X=Cl,Br,I)show great potential as solid electrolytes for solid-state lithium batteries due to their high Li-ion conductivities and excellent electrode ***,the relatively low conductivity of Li_(6)PS_(5)I(10^(-6)m S/cm)compared to the other two compositions limits its ***,Si-doped Li_(6.5)P_(0.5)Si_(0.5)S_(5)I electrolyte is designed and synthesized with superior high conductivity of 3.6 mS/*** characterization proves the increase due to the anion disorder and volume expansion caused by ***,the poor interfacial stability between layered oxide cathode Li Ni_(0.6)Co_(0.2)Mn_(0.2)O_(2)and Li_(6.5)P_(0.5)Si_(0.5)S_(5)I inhibits its battery *** introducing Li_(3)InCl6electrolyte in the configuration,the corresponding battery delivers high initial discharge capacity of 150.2m Ah/g and superior cyclability during 250 cycles at 0.5 *** work offers design strategy to obtain Li_(6)PS_(5)I-based electrolytes for high performance solid-state batteries.

关键词： Argyrodite electrolyte Li_(6.5)P_(0.5)Si_(0.5)S_(5)I All-solid-state lithiumbatteries Stability Electrochemical performance

electronic structure regulation and built-in electric field synergistically strengthen photocatalytic nitrogen fixation performance on Ti-BiOBr/TiO_(2)heterostructure

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Rare Metals 2024年第3期43卷 1125-1138页

作者： Ru-Qi Li yu-Jie Bian Chun-ming Yang Li Guo Tao-Xia Ma Chuan-Tao Wang Feng Fu dan-Jun Wang College of Chemistry and Chemical engineering Yan’an UniversityYan’an Key Laboratory of Green Catalysis and Quality Improvement and Utilization of Low Rank CoalYan’an716000China

At present,industrial synthetic ammonia was still obtained through the Hubble-Bosch process,with large energy *** is a research hotspot to realize green synthetic ammonia by using solar *** difficulty of photocatalytic ammonia synthesis was that the photo-excited electrons have not enough energy to active N≡*** this study,Ti was doped into BiOBr by one-step hydrothermal method,which was oxidized into TiO_(2)when the doping amount reaches the maximum,in situ forming Ti_(0.31)B_(0.69)OB/TiO_(2)*** from the synergistic effect of Ti doping and S-scheme heterojunction,the synthetic ammonia efficiency of Ti_(0.31)B_(0.69)OB/TiO_(2)-11.96 reached 1.643 mmol·g_(cat)^(-1)at mild conditions and without hole scavenger for up to 7 h,the efficiency of synthetic ammonia is 115 times,10.5 times and 3.3 times of that of BiOBr,Ti_(0.31)B_(0.69)OB and TiO_(2),***,DFT calculation confirms that Ti doping accurately refine the electronic structure of BiOBr,facilitate nitrogen adsorption activation and reduce hydrogenation reaction energy barrier,thus accelerating the reaction kinetics of photocatalytic nitrogen reduction(NRR),Meanwhile,constructing S-scheme heterojunction boosts the separation and transfer of photogenerated electron-hole pairs,improving the reduction ability of electrons in the conduction band of TiO_(2)and the oxidation ability of holes in the valence band of Ti_(0.31)B_(0.69)OB.

关键词： S-scheme heterostructure electronic structure regulation Built-in electric field Synergistical stren4gthening Photocatalytic nitrogen fixation

Temperature inversion enables superior stability for low-temperature Zn-ion batteries

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Journal of Energy Chemistry 2024年第4期91卷 245-253页

作者： Fu-Da yu Zhe-jian Yi Rui-Yang Li Wei-Hao Lin Jie Chen Xiao-yue Chen Yi-ming Xie Ji-Huai Wu zhang Lan Lan-Fang Que Bao-Sheng Liu Hao Luo Zhen-Bo Wang engineering Research Center of Environment-Friendly Functional Materials Ministry of EducationInstitute of Materials Physical ChemistryHuaqiao UniversityXiamen 361021FujianChina b2 school of electronic engineering Guangxi University of Science and TechnologyLiuzhou 545006GuangxiChina school of Materials Science and engineering Xiamen University of TechnologyXiamen 361024FujianChina school of Materials Science and engineering Zhengzhou UniversityZhengzhou 450001HenanChina MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage State Key Laboratory of Space Power-SourcesSchool of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina College of Materials Science and engineering Shenzhen UniversityShenzhen 518071GuangdongChina

It is challenging for aqueous Zn-ion batteries(ZIBs)to achieve comparable low-temperature(low-T)performance due to the easy-frozen electrolyte and severe Zn ***,an aqueous electrolyte with a low freezing point and high ionic conductivity is *** with molecular dynamics simulation and multi-scale interface analysis(time of flight secondary ion mass spectrometry threedimensional mapping and in-situ electrochemical impedance spectroscopy method),the temperature independence of the V_(2)O_(5)cathode and Zn anode is observed to be ***,dominated by the solvent structure of the designed electrolyte at low temperatures,vanadium dissolution/shuttle is significantly inhibited,and the zinc dendrites caused by this electrochemical crosstalk are greatly relieved,thus showing an abnormal temperature inversion *** the disclosure and improvement of the above phenomena,the designed Zn||V_(2)O_(5)full cell delivers superior low-T performance,maintaining almost 99%capacity retention after 9500 cycles(working more than 2500 h)at-20°*** work proposes a kind of electrolyte suitable for low-T ZIBs and reveals the inverse temperature dependence of the Zn anode,which might offer a novel perspective for the investigation of low-T aqueous battery systems.

关键词： Aqueous Zn-ion batteries Low-temperature performance Opposite temperature dependence Zndendrite growth Vanadium dissolution

Recent advances in Fe-N-C single-atom site coupled synergistic catalysts for boosting oxygen reduction reaction

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Electron 2024年第1期2卷 1-38页

作者： Katam Srinivas jian Zhen Hesheng yu Dawei Liu jian Zhen Ou ming‐qiang Zhu yuanfu Chen school of Integrated Circuit Science and engineering and State Key Laboratory of Electronic Thin Films and Integrated DevicesUniversity of Electronic Science and Technology of ChinaChengduSichuanChina College of Mechanical and electronic engineering Northwest A&F UniversityYanglingChina school of engineering RMIT UniversityMelbourneVictoriaAustralia

Metal-air batteries,fuel cells,and electrochemical H_(2)O2 production currently attract substantial consideration in the energy sector owing to their efficiency and ***,their broader use is hindered by the complex oxygen reduction reaction(ORR)that occurs at cathodes and involves intricate electron *** the significant ORR performance of platinum-based catalysts,their high cost,operational limitations,and susceptibility to methanol poisoning hinder broader *** emphasizes the need for efficient nonprecious metal-based ORR electrocatalysts.A promising approach involves utilizing single-atom catalysts(SACs)featuring metal-nitrogen-carbon(M-N-C)coordination *** offer advantages such as optimal utilization of metal atoms,uniform active centers,precisely defined catalytic sites,and robust metal-support ***,the symmetrical electron distribution around the central metal atom of a single-atom site(M-N4)often results in suboptimal ORR *** challenge can be addressed by carefully tailoring the surrounding environment of the active *** review specifically focuses on recent advancements in the Fe-N4 environment within Fe-N-C *** highlights the promising strategy of coupling Fe-N4 sites with metal clusters and/or nanoparticles,which enhances intrinsic *** capitalizing on the interplay between Fe-N4 sites and associated species,overall ORR performance *** review combines findings from experimental studies and density functional theory simulations,covering synthesis strategies for Fe-N-C coupled synergistic catalysts,characterization techniques,and the influence of associated particles on ORR *** offering a comprehensive outlook,the review aims to encourage research into high-efficiency Fe single-atom sites coupled synergistic catalysts for real-world applications in the coming years.

关键词： electrocatalysis oxygen reduction reaction particle@Fe-N-C single-atom catalysts synergistic catalysts

面向高密度柔性集成电路封装基板的精密视觉检测算法

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控制理论与应用 2024年第7期41卷 1255-1263页

作者：胡跃明黄丹于永兴罗家祥华南理工大学自动化科学与工程学院精密电子制造装备教育部工程研究中心/广东省高端芯片智能封测装备工程实验室广东广州510640 华北电力大学自动化系河北保定071066 广州现代产业技术研究院广东省先进封装测试工程技术研究中心广东广州510640 华南理工大学机械与汽车工程学院广东广州510640

高密度柔性集成电路(IC)封装基板是电子组件的核心载体,其制造过程中的刻蚀、显影等工艺需要严格的品质控制.本文开发了一种融合金相显微镜与工业相机的成像视觉检测系统,用于柔性IC封装基板的图像采集与品质控制.针对显微成像视野小、... 详细信息

高密度柔性集成电路(IC)封装基板是电子组件的核心载体,其制造过程中的刻蚀、显影等工艺需要严格的品质控制.本文开发了一种融合金相显微镜与工业相机的成像视觉检测系统,用于柔性IC封装基板的图像采集与品质控制.针对显微成像视野小、易离焦等问题,提出了一种基于中值的三元模式局部纹理快速自动对焦算法.此外,针对高倍镜下柔性IC封装氧化缺陷分布不均匀问题,引入微分几何工具,利用曲率等几何特征提出了一种基于动态曲线演化的高精度表面氧化分布特征检测模型.通过定性与定量的实验研究,验证了两种算法在快速性和高精度方面的优越性能.

关键词：柔性IC封装基板品质控制外观视觉检测自动对焦检测算法微分几何

基于Meta分析的煤矿区植被恢复对土壤有机碳储量的影响

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环境科学 2024年第3期45卷 1629-1643页

作者：李健明康雨欣蒋福祯宋明丹祁凯斌卢素锦李正鹏青海大学农林科学院西宁810016 青海大学生态环境工程学院西宁810016

煤矿开采是全世界应对不断增加的能源需求的主要手段.但随着煤矿开采,区域生态系统遭到不同程度的破坏,导致“碳汇”能力下降.植被恢复是矿区退化的生态系统和固碳功能恢复的基础.然而,目前尚未对全球范围内煤矿区植被恢复对土壤有机碳(... 详细信息

煤矿开采是全世界应对不断增加的能源需求的主要手段.但随着煤矿开采,区域生态系统遭到不同程度的破坏,导致“碳汇”能力下降.植被恢复是矿区退化的生态系统和固碳功能恢复的基础.然而,目前尚未对全球范围内煤矿区植被恢复对土壤有机碳(SOC)的影响进行系统研究,因此无法准确预测全球SOC库对植被恢复的响应.通过搜集同行评议的112篇文章中植被恢复的土壤理化性质,以评估煤矿区植被恢复类型、土壤深度、恢复年份、年均温、年降水量和海拔等对SOC的影响,并明确相关的关键驱动因素.结果表明,受损煤矿区通过植被恢复能够显著改善土壤的理化性质,植被恢复后土壤相较于未恢复或自然恢复SOC储量提升了39.02%.当不考虑环境因素时,利于SOC储量积累的植被恢复类型为:农田>林地>草地>灌木林. 4种类型的植被恢复对表层(0~20 cm)SOC储量均得到显著增加,草地和灌木能显著增加深层(>40 cm)的SOC储量,而林地和农田类型下深层的SOC储量与未恢复或自然恢复后的SOC储量无显著差异.植被恢复后SOC储量的增加趋势会随着土壤深度的增加而降低.具体的植被恢复策略应根据气候条件选择合适的植被类型.受损煤矿区在年均温15℃和年降水量>800 mm的环境下,林地和农田恢复类型能够更好地增加SOC储量. TN、 BD、 AN和AK是影响土壤固碳能力的主要因素.研究可为量化受损煤矿区不同植被恢复措施的固碳效果和退化生态系统的恢复与重建提供理论参考.

关键词：煤矿区植被恢复土壤有机碳储量土壤特性森林草地农田灌木林

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多LFM信号自适应时频表示方法

系统工程与电子技术 2008年第7期30卷 1245-1248页

作者：杜雨洺杨建宇张富贵王江成都信息工程学院电子工程系四川成都610225 电子科技大学电子工程学院四川成都610054

提出了一种多线性调频信号自适应时频表示方法及其快速算法:首先采用分数阶傅里叶变换的快速算法计算出模糊函数,再通过Radon-Ambiguity变换设计出信号的最优核函数,以滤除噪声和多线性调频信号在模糊域中的互项,最后通过二维傅里叶变... 详细信息

提出了一种多线性调频信号自适应时频表示方法及其快速算法:首先采用分数阶傅里叶变换的快速算法计算出模糊函数,再通过Radon-Ambiguity变换设计出信号的最优核函数,以滤除噪声和多线性调频信号在模糊域中的互项,最后通过二维傅里叶变换得到信号的时频表示。在多分量线性调频信号情况下借助"clean"的思想来抑制强分量对弱分量的干扰。仿真表明该方法在低信噪比环境下也十分有效,且运算复杂度小。

关键词：时频表示线性调频信号分数阶傅里叶变换 Radon-Ambiguity变换模糊函数