期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到20篇文章
< 1 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Size and light scattering enhancement of sea spray aerosol via condensing fatty acid vapor 认领 引用
1
作者 Minglan Xu Narcisse Tsona Tchinda +1 位作者 Siyang Li Lin Du 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第7期693-702,共10页
Once sea spray aerosol(SSA)particles are emitted into the atmosphere,they tend to interact with organic compounds and form a certain amount of organic coating on their surfaces.Here,laboratory measurements were perfor... Once sea spray aerosol(SSA)particles are emitted into the atmosphere,they tend to interact with organic compounds and form a certain amount of organic coating on their surfaces.Here,laboratory measurements were performed to investigate property changes between uncoated and coated SSA particles to assess the effect of organic coating on the surface chemistry and optical properties of nascent SSA.Stearic acid,oleic acid and mixed fatty acid were used as a proxy for coating materials and applied to aerosols produced by SSA generator.We found that the geometric mean diameter of SSA particles increased with increasing concentration of the fatty acid vapor due to higher heating temperatures,suggesting the formation of thicker coatings.Characterization by Fourier transform infrared spectroscopy and transmission electron microscope demonstrated that the SSA surface was coated with an organic coating of fatty acids,which gave the SSA a core–shell morphology.Furthermore,optical measurements by photo-acoustic extinctiometer at 375 nm revealed significantly enhanced light scattering efficiency and complex refractive index from fatty acid-coated SSA particles.The current results suggest that the fatty acid coating changes the diameter and surface composition of SSA particles,which may further impact their optical properties.It is therefore necessary to accurately characterize the overall properties of SSA particles carrying organic coatings due to condensing fatty acid vapor to reveal their overall impact on climate. 展开更多
关键词 Sea spray aerosol Organic coating Fatty acid Light scattering Complex refractive index
暂未订购 下载PDF
Laser Solid-Phase Synthesis of Robust Single-Atom Catalysts for CO2Hydrogenation to Methanol 认领 引用 被引量：2
2
作者 Rongxia Zhao Haocheng Li +10 位作者 Siyang Li Qin Wang Lei Lei Yuxiang Liu Ran Zhang Yihe Huang Hongfeng Yin Degao Wang Furong Liu Lin Li Zhu Liu 《Carbon Energy》 SCIE EI CSCD 2025年第9期28-40,共13页
The robustness of single-atom catalysts(SACs)is a critical concern for practical applications,especially for thermal catalysis at elevated temperatures under reductive conditions.In this study,a laser solid-phase synt... The robustness of single-atom catalysts(SACs)is a critical concern for practical applications,especially for thermal catalysis at elevated temperatures under reductive conditions.In this study,a laser solid-phase synthesis technique is reported to fabricate atom-nanoisland-sea structured SACs for the first time.The resultant catalysts are constructed by Pt single atoms on In2O3supported by Co3O4nanoislands uniformly dispersed in the sea of reduced graphene oxide.The laser process,with a maximum temperature of 2349 K within~100μs,produced abundant oxygen vacancies(up to 70.8%)and strong interactions between the Pt single atoms and In2O3.The laser-synthesized catalysts exhibited a remarkable catalytic performance towards CO2hydrogenation to methanol at 300°C with a CO2conversion of 30.3%,methanol selectivity of 90.6%and exceptional stability over 48 h without any deactivation,outperforming most of the relevant catalysts reported in the literature.Characterization of the spent catalysts after testing for 48 h reveals that the Pt single atoms were retained and the oxygen vacancies remained almost unchanged.In situ diffuse reflectance infrared Fourier transform spectrum was conducted to establish the reaction mechanism supported by the density functional theory simulations.It is believed that this laser synthesis strategy opens a new avenue towards rapidly manufacturing highly active and robust thermal SACs. 展开更多
关键词 CO2conversion CO2hydrogenation to methanol laser synthesis methanol selectivity single-atom catalysts stability
暂未订购 下载PDF
Laser-implantation strategy regulating dynamic evolution for ultra-stable CO2hydrogenation 认领 引用
3
作者 Rongxia Zhao Shilin Fan +10 位作者 Zerui Li Siyang Li Ran Zhang Haocheng Li Hongfeng Yin Lei Lei Degao Wang Furong Liu Lin Li Yuxiang Liu Zhu Liu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第7期375-389,I0010,共15页
Single-atom catalysts for CO2hydrogenation often deactivate due to structural instability under harsh reductive conditions.An amorphous-crystalline hybrid structured In2O3/Co3O4-based catalyst with Pt s... Single-atom catalysts for CO2hydrogenation often deactivate due to structural instability under harsh reductive conditions.An amorphous-crystalline hybrid structured In2O3/Co3O4-based catalyst with Pt single-atom implantation is innovatively synthesised by laser irradiation.In this work,a dynamic sacrificial-evolution-protection regulation strategy is proposed.The implanted Pt single-atoms,serving as active seeds,undergo migration and trigger reaction-induced dynamic evolution to generate sintering-resistant CoPt3and Co3InC0.75to prevent excessive reduction of In2O3to free metallic In.Concurrently,a self-constructed atomically ordered crystalline core-amorphous oxygen-enriched protective layer(AOL)contributes to anti-sintering,dynamic oxygen compensation,and stabilization of"HCOO intermediates.As a result,the catalyst achieves 16.21%±0.98% CO2conversion and 90.57%±1.02%CH3OH selectivity over 1000 h.This study elucidates the synergistic mechanism of laser-implanted single-atom catalysts,highlighting the dynamic evolution-driven retention of activity and stability,and establishes a direct correlation between the dynamic evolution of multicomponent structures and performance.This efficient and convenient laser solid-phase synthesis technique enables coupled design of single-atom implantation and dynamic regulation of multicomponent structures,offering a critical strategy for green methanol synthesis and the design of ultra-stable catalysts under extreme conditions. 展开更多
关键词 Laser synthesis Single-atom catalyst Oxygen vacancy CO2hydrogenation to methanol Stability Amorphous-crystalline Sintering
暂未订购 下载PDF
Imide-based covalent organic framework with excellent cyclability as an anode material for lithium-ion battery 认领 引用
4
作者 Yue Qian Zhoujia Liu +7 位作者 Haixin Song Ruize Yin Hanni Yang Siyang Li Weiwei Xiong Saisai Yuan Junhao Zhang Huan Pang 《Chinese Chemical Letters》 SCIE CAS CSCD 2024年第6期206-210,共5页
Covalent organic frameworks(COFs)exhibiting reversible redox behaviors have been identified as promising candidates for constructing electrode materials in lithium-ion batteries(LIBs).However,their extensive applicati... Covalent organic frameworks(COFs)exhibiting reversible redox behaviors have been identified as promising candidates for constructing electrode materials in lithium-ion batteries(LIBs).However,their extensive application has been limited due to finite redox sites and poor structural stability.In this study,we design and synthesize a novel polyimide covalent organic framework(PI-COF)using the traditional solvothermal method and successfully apply it as an anode material for LIBs.The large conjugated structure of PI-COF accelerates charge transfer,while its large surface area provides more active sites,making PI-COF an attractive anode material for LIBs.Furthermore,the PI-COF anode material demonstrates high reversible specific capacity and excellent long-term cycling stability due to its COF characteristics.Specifically,the PI-COF electrodes deliver a specific capacity of 800 m Ah/g at a current density of 200 m A/g after 200 cycles,while a specific capacity of 450 m Ah/g at a current density of 1000 m A/g is sustained after 800 cycles.The outstanding lithium storage capacity,particularly the satisfactory long-term cycling stability,establishes PI-COF as a promising material for LIBs. 展开更多
关键词 Ethylenediaminetetraacetic dianhydride Covalent organic frameworks Polyimide Lithium-ion battery Anode material
暂未订购 下载PDF
Study on the Factors Affecting the Ability of Higher Vocational College Students in Practical English Test 认领 引用
5
作者 Siyang LI 《International Journal of Technology Management》 2015年第4期45-46,共2页
Practical English test for higher vocational colleges is examining students learning effect, curriculum arrangement and teaching model rationality, and it is one of the important propositions in the study of English a... Practical English test for higher vocational colleges is examining students learning effect, curriculum arrangement and teaching model rationality, and it is one of the important propositions in the study of English application ability. In practical English test, concreteness, pertinence and practicability are emphasized. It is closely linked with the students＇ knowledge practice and attracts more attention from school teachers and students to a large extent. In the real interactive teaching and learning, the scores of higher vocational college students in practical English test are affected by many factors. In this paper, the factors affecting the ability of higher vocational college students in practical English test are discussed from teaching model, learning strategies, and the cultivation of the students＇ English comprehensive ability. 展开更多
关键词 Higher Vocational Colleges Practical English Test Scores Factors
暂未订购 下载PDF
Infrared spectroscopic probing of dimethylamine clusters in an Ar matrix 认领 引用
6
作者 Siyang Li Henrik G.Kjaergaard Lin Du 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2016年第2期51-59,共9页
Amines have many atmospheric sources and their clusters play an important role in aerosol nucleation processes. Clusters of a typical amine, dimethylamine（DMA）, of different sizes were measured with matrix isolation... Amines have many atmospheric sources and their clusters play an important role in aerosol nucleation processes. Clusters of a typical amine, dimethylamine（DMA）, of different sizes were measured with matrix isolation IR（infrared） and NIR（near infrared）spectroscopy. The NIR vibrations are more separated and therefore it is easier to distinguish different sizes of clusters in this region. The DMA clusters, up to DMA tetramer, have been optimized using density functional methods, and the geometries, binding energies and thermodynamic properties of DMA clusters were obtained. The computed frequencies and intensities of NH-stretching vibrations in the DMA clusters were used to interpret the experimental spectra. We have identified the fundamental transitions of the bonded NH-stretching vibration and the first overtone transitions of the bonded and free NH-stretching vibration in the DMA clusters. Based on the changes in vibrational intensities during the annealing processes, the growth of clusters was clearly observed. The results of annealing processes indicate that DMA molecules tend to form larger clusters with lower energies under matrix temperatures, which is also supported by the calculated reaction energies of cluster formation. 展开更多
关键词 Matrix isolation Infrared（IR） spectroscopy Dimethylamine clusters Aerosol nucleation
暂未订购 下载PDF
TiO2负载超低含量AuPd纳米颗粒在水蒸气条件下实现稳定的光催化甲烷偶联生成乙烷 认领 引用 被引量：7
7
作者 谢君 蒋雨恒 +5 位作者 李思扬 徐鹏 郑强 范晓宇 彭海琳 唐智勇 《物理化学学报》 SCIE CAS CSCD 北大核心 2023年第10期1-10,共10页
选择性转化甲烷为C2烃类是一种高效利用天然气并减少对传统化石燃料依赖的方法。与高温高压的热催化途径不同,光催化方法可以在温和条件下实现甲烷活化和选择性转化,是一种非常具有前景的可持续途径。然而,使用廉价光催化剂在流动条... 选择性转化甲烷为C2烃类是一种高效利用天然气并减少对传统化石燃料依赖的方法。与高温高压的热催化途径不同,光催化方法可以在温和条件下实现甲烷活化和选择性转化,是一种非常具有前景的可持续途径。然而,使用廉价光催化剂在流动条件下实现高效C2化合物的生成仍然是一个巨大挑战。本文通过简单的化学还原法合成了一种具有超低负载量的AuPd合金纳米颗粒负载的TiO2光催化剂(Au0.05-Pd0.05/TiO2),用于光催化甲烷转化。在流动反应条件下,含水蒸气的甲烷可以高效转化为包括乙烷和乙烯在内的C2化合物,C2产率高达10092μmol·g−1·h−1,选择性为77%。更重要的是,在反应持续32 h后,催化活性没有显著降低。Au0.05-Pd0.05/TiO2的光催化甲烷转化的活性和稳定性超过了迄今为止报道的结果。Au0.05-Pd0.05/TiO2良好的催化活性可以归因于金和钯的协同效应,不仅促进了光生载流子的分离而且有利于·CH3的C―C键耦合进而产生C2化合物。同时,引入水蒸气有助于及时补充在甲烷活化过程中消耗的晶格氧,从而保持催化剂的稳定性。这项工作有望为设计甲烷到C2化合物的可持续光催化转化途径提供一个典范。 展开更多
关键词 光催化 甲烷 流动反应 水蒸气 AuPd合金纳米颗粒 C2化合物
暂未订购 下载PDF
无序蛋白质在生物分子凝聚相形成与调控中的作用 认领 引用 被引量：1
8
作者 王妍妍 陈丽敏 +1 位作者 李思扬 来鲁华 《化学进展》 SCIE CAS CSCD 北大核心 2022年第7期1610-1618,共9页
生物分子凝聚形成生物体内的多种无膜细胞器,其独特的物理化学性质使其具有多样的生物学功能,包括感知外界环境的变化、调节蛋白在细胞内的浓度、调控信号转导途径以及选择性富集特定蛋白质和RNA等。同时,生物分子凝聚相的错误形成与调... 生物分子凝聚形成生物体内的多种无膜细胞器,其独特的物理化学性质使其具有多样的生物学功能,包括感知外界环境的变化、调节蛋白在细胞内的浓度、调控信号转导途径以及选择性富集特定蛋白质和RNA等。同时,生物分子凝聚相的错误形成与调控会导致多种人类疾病,如神经退行性疾病、癌症和病毒性疾病等。无序蛋白质在生物分子凝聚相的形成和调控中发挥了重要作用。本文通过总结分析无序蛋白在生物分子凝聚相形成中的作用以及化学小分子对生物分子凝聚相的调控,探讨了通过靶向无序蛋白进行配体设计来获得调控生物分子凝聚相化学探针及药物的可能性,并展望了揭示无序蛋白及化学分子调控生物凝聚相机制应重点关注的问题。 展开更多
关键词 无序蛋白质 生物分子凝聚相 驱动力 化学小分子调控
暂未订购 下载PDF
Optimizing the enterprise inclusion threshold setting of China’s national carbon market 认领 引用
9
作者 Ke Wang Siyang Li Yujiao Xian 《Fundamental Research》 CSCD 2026年第2期1149-1160,共12页
In July 2021,China launched its national carbon emission trading system(ETS),initially targeting thermal power plants with annual emissions exceeding 26,000 tons of carbon dioxide(CO2).Optimizing the inclusion thre... In July 2021,China launched its national carbon emission trading system(ETS),initially targeting thermal power plants with annual emissions exceeding 26,000 tons of carbon dioxide(CO2).Optimizing the inclusion thresholds within the ETS is crucial for effective carbon market policy formulation.This study introduces a threshold optimization model for ETS that evaluates carbon market benefits across varied inclusion thresholds and identifies the optimal threshold based on the cost savings per unit of emission reduction.We applied this model to determine the optimal inclusion threshold for China’s national ETS and to prioritize the order of industry inclusion under the adjusted threshold.Our simulation results indicate the following:(i)For the exclusive participation of the thermal power sector in the ETS,the optimal inclusion threshold is 19,000 tons of CO2;however,this threshold decreases to 3,000 tons of CO2when all major sectors are included;(ii)In the expansion phases of the ETS,the optimal sequence for industry inclusion is cement manufacturing,steel smelting,basic chemical raw materials,and aluminum smelting,which maximizes ETS benefits and reduces abatement costs by 36%;(iii)Under the optimal threshold,large-scale enterprises benefit significantly more than small and medium-sized enterprises,capturing over 70%of total ETS advantages;(iv)There exists an"inverted U-shaped"correlation between ETS benefits and carbon reduction targets. 展开更多
关键词 Emission trading scheme Carbon market inclusion threshold China’s national carbon market Industry inclusion order Abatement cost savings
Multiplexed manipulation of orbital angular momentum and wavelength in metasurfaces based on arbitrary complex-amplitude control 认领 引用 被引量：16
10
作者 Guoli He Yaqin Zheng +4 位作者 Changda Zhou Siyang Li Zhonghong Shi Yanhui Deng Zhang-Kai Zhou 《Light: Science & Applications》 SCIE EI CSCD 2024年第5期930-940,共11页
Due to its unbounded and orthogonal modes,the orbital angular momentum(OAM)is regarded as a key optical degree of freedom(DoF)for future information processing with ultra-high capacity and speed.Although the manipulat... Due to its unbounded and orthogonal modes,the orbital angular momentum(OAM)is regarded as a key optical degree of freedom(DoF)for future information processing with ultra-high capacity and speed.Although the manipulation of OAM based on metasurfaces has brought about great achievements in various fields,such manipulation currently remains at single-DoF level,which means the multiplexed manipulation of OAM with other optical DoFs is still lacking,greatly hampering the application of OAM beams and advancement of metasurfaces.In order to overcome this challenge,we propose the idea of multiplexed coherent pixel(MCP)for metasurfaces.This approach enables the manipulation of arbitrary complex-amplitude under incident lights of both plane and OAM waves,on the basis of which we have realized the multiplexed DoF control of OAM and wavelength.As a result,the MCP method expands the types of incident lights which can be simultaneously responded by metasurfaces,enriches the information processing capability of metasurfaces,and creates applications of information encryption and OAM demultiplexer.Our findings not only provide means for the design of high-security and high-capacity metasurfaces,but also raise the control and application level of OAM,offering great potential for multifunctional nanophotonic devices in the future. 展开更多
关键词 momentum offering overcome
暂未订购 下载PDF
Unveiling potential sex-determining genes and sex-specific markers in autotetraploid Carassius auratus 认领 引用 被引量：2
11
作者 Kun Zhang Xu Huang +15 位作者 Chongqing Wang Xidan Xu Xiaowei Xu Xiaoping Dong Qingwen Xiao Jinhai Bai Yue Zhou Zhengkun Liu Xinyi Deng Yan Tang Siyang Li Enkui Hu Wanjing Peng Ling Xiong Qinbo Qin Shaojun Liu 《Science China(Life Sciences)》 SCIE CAS CSCD 2024年第11期2444-2458,共15页
Autotetraploid Carassius auratus is a stable hereditary autotetraploid fish resulting from the hybridization of Carassius auratus red var.(RCC,♀)×Megalobrama amblycephala(BSB,♂),containing four sets of RCC chro... Autotetraploid Carassius auratus is a stable hereditary autotetraploid fish resulting from the hybridization of Carassius auratus red var.(RCC,♀)×Megalobrama amblycephala(BSB,♂),containing four sets of RCC chromosomes.However,the molecular mechanism underlying the determination of sex in this species remains largely unknown.Currently,there lacks a full understanding of the molecular mechanisms governing sex determination and specific molecular markers to differentiate sex in this species.In this study,25,801,677 SNPs(Singlenucleotide polymorphism)and 6,210,306 Indels(insertion-deletion)were obtained from whole-genome resequencing of 100 individuals(including 50 female and 50 male).Further identification confirmed the candidate chromosomes as Chr46B,with the sex-determining region located at Chr46B:22,500,000‒22,800,000 bp.Based on the male-specific insertion(26 bp)within the candidate sex-determining region,a pair of sex-specific molecular markers has been identified.In addition,based on the screening of candidate sex-determining region genes and RT-qPCR validation analysis,ADAM10,AQP9 and tc1a were identified as candidate sex-determining genes.These findings provide a robust foundation for investigating sex determination mechanisms in fish,the evolution of sex chromosomes,and the development of monosex populations. 展开更多
关键词 autotetraploid Carassius auratus sex-specific marker sex determination gene Re-sequencing
暂未订购 下载PDF
汇率改革对中国外汇市场有效性的影响——基于利率平价理论的实证研究 认领 引用
12
作者 金昭 李思扬 +1 位作者 胡杏 施展 《经济管理学刊》 2023年第4期239-278,共40页
本文采用2011—2022年离岸市场利率平价偏离(CIP偏离)指标衡量汇率市场有效性,研究了“8·11”汇改等汇率改革政策对外汇市场有效性的影响。本文发现:①离岸市场CIP偏离平均为正;②“8·11”汇改后CIP偏离在汇率政策偏市场阶段... 本文采用2011—2022年离岸市场利率平价偏离(CIP偏离)指标衡量汇率市场有效性,研究了“8·11”汇改等汇率改革政策对外汇市场有效性的影响。本文发现:①离岸市场CIP偏离平均为正;②“8·11”汇改后CIP偏离在汇率政策偏市场阶段显著下降,而在偏调控阶段则与汇改前无明显差异;③离岸与在岸市场CIP偏离存在差异。汇改对CIP偏离的影响机制有二:其一,汇率改革让价格市场化,使得汇率价格在套利作用下向利率平价成立方向移动;其二,汇率改革减少了市场摩擦和不确定性风险,“8·11”汇改后套利限制和市场风险相关变量与CIP偏离之间的关系大幅减弱。离岸市场是跨境交易的主要依托和人民币国际化的关键环节,本文结果补充了汇率改革对离岸市场有效性的影响,为进一步推进人民币国际化、加强汇率和金融市场开放提供了政策参考。 展开更多
关键词 抛补利率平价偏差 “8·11”汇改 人民币国际化
暂未订购 下载PDF
Generating arrays of perfect vector vortex beam with six on-demand degrees of freedom in metasurfaces 认领 引用 被引量：1
13
作者 Changda Zhou Yaqin Zheng +4 位作者 Guoli He Siyang Li Yanhui Deng Houjiao Zhang Zhang-Kai Zhou 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CSCD 2025年第5期125-134,共10页
Perfect vector vortex beams(PVVBs)possess various degrees of freedom(Do Fs)for optical information applications,benefiting from increasing information capacity,processing speed,etc.During the last two decades,various ... Perfect vector vortex beams(PVVBs)possess various degrees of freedom(Do Fs)for optical information applications,benefiting from increasing information capacity,processing speed,etc.During the last two decades,various methods have been proposed for generating and controlling PVVBs,but most of these methods can only manipulate two or three Do Fs,greatly hindering further exploration and application of PVVBs.To overcome this problem,we propose an attenuation-controlled holographic technique based on metasurfaces,which can realize the arbitrary and independent control of 6-DoFs,greatly improving the manipulation dimension of PVVBs.The PVVBs with 6 on-demand Do Fs can appear in the array forms of either concentric or matrix rings without cross-talks or number limitations,which notably enlarges the number of information channels that can be simultaneously employed.Furthermore,we introduce a multi-dimensional dynamic addressing strategy for optical encryption with the advantages of both large capacity and high security due to its theoretically infinite code space.Our findings can not only deepen the study of optical field manipulation at the nanoscale,but also expand the application of structural light,promoting their utilization across the fields of nanophotonics,integrated optics,and optical information science at the high-dimensional level. 展开更多
关键词 orbital angular momentum singular optics Poincarébeam light field regulation
暂未订购 下载PDF
High-resolution sequence stratigraphic framework and target sand bodies correlation of tight oil reservoirs in the Upper Triassic Yanchang Formation, Ordos Basin 认领 引用
14
作者 Xiulin Hou Mingqiu Hou +5 位作者 Qingfu Feng Yuxiang Xiao Zhengdong Lei Lingbin Lai Siyang Li Hongyu Tian 《Petroleum Research》 EI CAS CSCD 2025年第4期749-763,共15页
In this study,we developed a high-resolution stratigraphic framework for the Yanchang Formation in the Huachi Block of the Qingyang Oilfield,located in the Ordos Basin,northwest China.Using well log and seismic data,w... In this study,we developed a high-resolution stratigraphic framework for the Yanchang Formation in the Huachi Block of the Qingyang Oilfield,located in the Ordos Basin,northwest China.Using well log and seismic data,we traced and correlated sweet-spot sand bodies in tight oil reservoirs.Three long-term base-level cycles were identified in the Yanchang Formation,and five medium-term base-level cycles were delineated from the Chang 72 sub-Member to the Chang 4+5 Members,corresponding to five distinct oil groups.The primary production layer,Oil Group 3,was further divided into short-term and very short-term base-level cycles to facilitate the prediction of hydrocarbon target zones.Sweet-spot sand bodies were traced and correlated within very short-term cycles.The sweet-spot sand bodies are mainly sublacustrine channel deposits in the delta front,which were mainly developed in the five single layers(3-1-2,3-1-3,3-1-4,3-2-2,3-2-3 and 3-2-5)of the small layers 3-1 and 3-2 during the regression periods of base-level cycles.The sweet spot sand bodies within the small layer 3-2 are derived from three sets of sources in the northeast,northwest,and south of the basin.The Class I sweet spot is distributed within the single layer 3-2-5,with an average thickness of about 6 m,covering about 25%of the study area.The Class II sweet spot is developed in all five single layers,with the thickest and largest sweet-spot sand body in the Single layer 3-2-3,covering about 90%of the study area.This study highlights the critical importance of establishing a high-resolution sequence stratigraphic framework for the refined delineation of sweet-spot sand bodies within a deltaic-lacustrine depositional system.Additionally,sublacustrine fan deposits formed during the regressive semi-cycle were identified as key sweet spots in the study area. 展开更多
关键词 Ordos Basin High-resolution sequence stratigraphic framework Tight oil reservoirs Stratigraphic correlation
Recent advances on aerobic photocatalytic methane conversion under mild conditions 认领 引用 被引量：10
15
作者 Yuheng Jiang Siyang Li +1 位作者 Xiaoyu Fan Zhiyong Tang 《Nano Research》 SCIE EI CSCD 2023年第11期12558-12571,共14页
Photocatalytic methane conversion to high value-added chemicals under mild conditions acts as a promising approach to utilize natural gas and renewable energy.Specifically,aerobic photocatalytic methane conversion tha... Photocatalytic methane conversion to high value-added chemicals under mild conditions acts as a promising approach to utilize natural gas and renewable energy.Specifically,aerobic photocatalytic methane conversion that uses molecular oxygen as oxidant has attracted much attention because it is thermodynamic favorable and could generate various reactive oxygen species,resulting in many value-added products like methanol,formaldehyde,ethane,and ethylene.In this review,we classify the aerobic photocatalytic methane conversion into aerobic photocatalytic partial oxidation of methane(APPOM)and aerobic photocatalytic coupling of methane(APCM).We particularly focus on the fundamentals of oxygen activation and methane reaction modes in these conversions.Finally,we provide a brief summary for current challenges and future prospects towards aerobic photocatalytic methane conversion. 展开更多
关键词 photocatalysis oxygen methane oxidation coupling mild conditions
暂未订购 下载PDF
Photocatalytic Methane Conversion:Insight into the Mechanism of C(sp3)-H Bond Activation 认领 引用 被引量：11
16
作者 Yuheng Jiang Yingying Fan +1 位作者 Siyang Li Zhiyong Tang 《CCS Chemistry》 CSCD 2023年第1期30-54,共25页
Mild and direct conversion of methane into high value-added products is a desired goal for chemistry,energy,and environment.The active species generated in the photocatalytic reaction system under mild conditions acti... Mild and direct conversion of methane into high value-added products is a desired goal for chemistry,energy,and environment.The active species generated in the photocatalytic reaction system under mild conditions activate the inert C-H bond in methane and promote methane conversion.This review focuses on the developed mechanisms for C(sp3)-H bond activation in photocatalytic methane conversion,including radical and active site mechanisms.Particular emphasis is placed on the detailed summary of mechanism,characterization method,and corresponding application in photocatalytic methane conversion.We also discuss the challenges and prospects for future direction on C(sp3)-H bond activation mechanism in photocatalytic methane conversion.This review aims to promote the development of photocatalytic methane conversion and provides guidance for the design of high-efficiency photocatalysts. 展开更多
关键词 photocatalysis methane C-H bonds radical active site
Inhibition of Heterogeneous Nucleation in Water by Hydrogel Coating 认领 引用 被引量：1
17
作者 Siyang Li Panpan Zhu +6 位作者 Yaoting Xue Lei Wangg Tuck-Whye Wong Xuxu Yang Haoei Zhou Tiefeng Li We Yang 《Research》 SCIE EI CSCD 2024年第2期139-147,共9页
Heterogeneous nucleation plays a critical role in the phase transition of water,which can cause damage in various systems.Here,we report that heterogeneous nucleation can be inhibited by utilizing hydrogel coatings to... Heterogeneous nucleation plays a critical role in the phase transition of water,which can cause damage in various systems.Here,we report that heterogeneous nucleation can be inhibited by utilizing hydrogel coatings to isolate solid surfaces and water.Hydrogels,which contain over 90%water when fully swelled,exhibit a high degree of similarity to water.Due to this similarity,there is a great energy barrier for heterogeneous nucleation along the water-hydrogel interface.Additionally,hydrogel coatings,which possess polymer networks,exhibit higher fracture energy and more robust adhesion to solid surfaces compared to water.This high fracture and adhesion energy acts as a deterrent for fracture nucleation within the hydrogel or along the hydrogel-solid interface.With a hydrogel layer approximately 100μm thick,the boiling temperature of water under atmospheric pressure can be raised from 100 to 108℃.Notably,hydrogel coatings also result in remarkable reductions in cavitation pressure on multiple solid surfaces.We have demonstrated the efficacy of hydrogel coatings in preventing damages resulting from acceleration-induced cavitation.Hydrogel coatings have the potential to alter the energy landscape of heterogeneous nucleation on the water-solid interface,making them an exciting avenue for innovation in heat transfer and fluidic systems. 展开更多
关键词 fracture cavitation similarity
A novel one-dimensional Co-phenylmercaptotetrazole MOF templated fabrication of N,S co-doped Co9S8@NSC porous nanotubes for oxygen evolution reaction 认领 引用 被引量：2
18
作者 Peixue Fu Ruize Yin +8 位作者 Shitan Yan Yue Qian Qin Cheng Hanni Yang Siyang Li Weiwei Xiong Junhao Zhang Aihua Yuan Ting Bian 《Science China Materials》 SCIE EI CAS CSCD 2024年第10期3206-3214,共9页
In this work,we report a novel one-dimensional metal-organic framework(MOF)templated for the synthesis of transition metal sulfides with excellent oxygen evolution reaction(OER)performance via a self-sulfidation proce... In this work,we report a novel one-dimensional metal-organic framework(MOF)templated for the synthesis of transition metal sulfides with excellent oxygen evolution reaction(OER)performance via a self-sulfidation process,eliminating the need for additional sulfur sources.After pyrolysis,MOFs containing Co ions as the metal nodes and 1-phenyl-5-mercaptotetrazole(PMTA)as the ligand were transformed to Co9S8nanoparticles,which were encapsulated in a nitrogen and sulfur dual-doped carbon(Co9S8@NSC)matrix.Additionally,PMTA,as a ligand,possesses the unique advantage of forming porous coordination polymers with a wide range of metals(e.g.,Fe,Ni,and Cu),enabling the versatile synthesis of transition metal sulfide electrocatalysts.Consequently,when served as the electrocatalyst for OER,the N,S co-doped Co9S8@NSC porous nanotubes exhibited excellent OER performance with the overpotential of only 248 mV at 10 mA cm−2and long-term stability.These works provide new insights and inspiration for the rational design and development of non-precious metal-based sulfides with practical potential applications. 展开更多
关键词 electrocatalysts transition metal sulfides N,S codoped carbon composites oxygen evolution reaction one-dimensional metal-organic frameworks
暂未订购 下载PDF
室温克级构筑Cu@CuO及其在法拉第葡萄糖电氧化过程中的动力学提升机制 认领 引用 被引量：4
19
作者 李苏原 夏海艳 +9 位作者 刘彦鹏 曹成 李思阳 王小军 田娜 刘丽霞 路鹏飞 全昌云 罗均华 彭尚龙 《Science China Materials》 SCIE EI CAS CSCD 2023年第11期4396-4402,共7页
在临床应用中,一次性条形血糖传感器可以日常监测和维持糖尿病患者的血糖水平,以预防和避免危及生命的并发症.本文采用室温可控原位氧化商业铜的工艺制备了Cu@CuO材料.将具有电催化性能的Cu@CuO丝网印刷到一次性银碳工作电极上,制备了... 在临床应用中,一次性条形血糖传感器可以日常监测和维持糖尿病患者的血糖水平,以预防和避免危及生命的并发症.本文采用室温可控原位氧化商业铜的工艺制备了Cu@CuO材料.将具有电催化性能的Cu@CuO丝网印刷到一次性银碳工作电极上,制备了条形无酶葡萄糖传感器.该传感器对葡萄糖的电催化氧化表现出优异的性能:高灵敏度(0.03μA mmol-1L cm-2)、低检测限(1.3μmol L-1)、宽线性范围(0.0013-2.5 mmol L-1)、良好的选择性、重复性(20个电极的相对标准偏差为4.28%),以及在室温下超过3周的稳定性.计算结果表明,铜组分提高了Cu@CuO的导电性和对葡萄糖的吸附能力,从而改善了其在葡萄糖法拉第催化过程中的动力学性能.更重要的是,Cu@CuO的批量制备及其在临床型电极中的应用为其在无酶血糖传感方面的应用提供了一个参考方案. 展开更多
关键词 electrochemical sensor Cu@CuO glucose detection screen-printing technique room temperature
暂未订购 下载PDF
人类海马亚区的连接结构及功能机制的MRI研究进展 认领 引用 被引量：8
20
作者 孙丽丽 任鹏 +3 位作者 李志鹏 李斯玚 刘秋逸 梁夏 《科学通报》 EI CAS CSCD 北大核心 2021年第35期4510-4523,共14页
海马是大脑中最为重要的区域之一,主要参与和负责学习、记忆等功能.近年来,海马各个亚区的结构和功能愈发地受到人们的关注.研究发现,利用高分辨率结构和功能磁共振成像技术能够获得海马各个亚区较为明确的解剖结构及功能连接,不同的海... 海马是大脑中最为重要的区域之一,主要参与和负责学习、记忆等功能.近年来,海马各个亚区的结构和功能愈发地受到人们的关注.研究发现,利用高分辨率结构和功能磁共振成像技术能够获得海马各个亚区较为明确的解剖结构及功能连接,不同的海马亚区能够分别执行模式分离(pattern separation)和/或模式完成(pattern completion)等基本计算过程,且具有功能特异性.另一方面,研究发现,许多神经精神疾病(如阿尔茨海默病等)与海马内各亚区及其特定环路的异常变化有关.本文以海马亚区的解剖结构及功能连接为基础,沿着海马内经典的三突触回路(DG→CA3→CA1),回顾了近年来海马亚区相关的研究成果.以动物海马方面的相关研究为切入点,重点阐述了人类海马内各亚区及相关的海马外皮层所具备的功能,及其与常见的神经系统退行性疾病之间的关系,同时提出当前存在的一些问题及未来的研究方向. 展开更多
关键词 海马亚区 三突触回路 功能连接 模式分离/模式完成 磁共振成像
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈