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How the microenvironment dominated by the distance effect to regulate the FeN_(4)site ORR activity and selectivity?

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Nano Research 2024年第6期17卷 5735-5741页

作者： Peng Li Qingfeng Guo Jianrui Zhang Ruilin Chen shujiang Ding Yaqiong Su School of Chemistry Engineering Research Center of Energy Storage Materials and Devices of Ministry of EducationNational Innovation Platform(Center)for Industry-Education Integration of Energy Storage TechnologyXi’an Jiaotong UniversityXi’an 710049China Huanghe Science and Technology College Zhengzhou 450063China General Research Institute of Engineering of Gotion High-Tech Hefei 230041China

The distance effect of the doped heteroatoms away from the catalytic centers has rarely been reported.In this work,we conducted density functional theory calculations to thoroughly investigate the influence of heteroatom(N,P,B,and S atoms)doping distance on the oxygen reduction reaction(ORR)activity of graphene-based FeN_(4)sites.We uncovered a Sabatier-like relationship between heteroatom doping distance and ORR activity of FeN_(4)sites.The nearest doping does not significantly improve and even block the ORR activity of FeN_(4)sites.Optimal ORR activity is achieved when the heteroatoms are 4-5Å(N,P,and S atoms)or 6-7Å(B atoms)away from the Fe atoms.Analysis of electronic structure indicates that distance effect can modulate the local chemical environment of Fe atoms,thereby account for the changes in ORR activity along with the doping distance and doping atoms.This study provides insights into the influence of heteroatom doping on the chemical environment of reaction active centers,and provides the theoretical guidance for controlling the doping distance of heteroatoms to achieve optimal catalytic activity and selectivity.

关键词： distance effect microenvironment heteroatom doping FeN_(4) Sabatier-like relationship structure-activity relationship

Co-seismic deformation derived from GPS observations during April 20th,2013 Lushan Earthquake,Sichuan,China

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Earthquake Science 2013年第3期26卷 153-160页

作者： Yujun Du Zemin Wang shujiang yang Jiachun An Qiang Liu Guowei Che School of Geodesy and Geomatics Wuhan University Chinese Antarctic Center of Surveying and Mapping Wuhan University Research Center of GNSS Wuhan University Tianjin Institute of Surveying and Mapping

We process the standard 30 s, static GPS data and the 1 s, high-rate GPS （HRGPS） data provided by the Crustal Movement Observation Network of China with GAMIT/GLOBK software package, and obtain the co- seismic displacements of near field and far field, and the epoch-by-epoch time series of HRGPS during Lushan earthquake. GPS data from about 20 sites in Sichuan province, which located between 40 and 450 km from the epicenter, are analyzed so as to study the characteristics of the static displacements and the dynamic crustal defor- mations, with periods ranging from several minutes to over a month. The result shows that： the static displacements caused by Lushan earthquake are limited to several centi- meters; the nearest station SCTQ at 43 km from the epi- center has the largest static displacement of about 2 cm, while the other stations generally have insignificant dis- placements of less than 5 mm. the stations in the east ofSichuan-Yunnan region shifts 5-10 mm toward the southwest, and the stations in the middle-west of Sichuan Basin moves indistinctively 1-2 mm toward the northwest; station SCTQ has the largest kinematic displacement of about 4 and 3 cm peak-to-peak on the north and east component, respectively, and is much greater than the static permanent displacement; for the stations located at a distance greater than 150 km from the epicenter, the kinematic motions are generally insignificant; exception- ally, station SCNC and station SCSN in central Sichuan Basin have significant kinematic motions although they are more than 200 km away from the epicenter.

关键词： Lushan earthquake GPS seismology Co-seismic displacement Time series

Simulated Indonesian Throughflow in Makassar Strait across the SODA3 products

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Acta Oceanologica Sinica 2024年第1期43卷 80-98页

作者： Tengfei Xu Zexun Wei Haifeng Zhao Sheng Guan shujiang Li Guanlin Wang Fei Teng Yongchui Zhang Jing Wang First Institute of Oceanography/Key Laboratory of Marine Science and Numerical Modeling Ministry of Natural ResourcesQingdao 266061China Laboratory for Regional Oceanography and Numerical Modeling Qingdao Marine Science and Technology CenterQingdao 266237China College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073China CAS Key Laboratory of Ocean Circulation and Waves Center for Ocean Mega-ScienceInstitute of OceanologyChinese Academy of ScienceQingdao 266071China

The Indonesian Throughflow(ITF), which connects the tropical Pacific and Indian oceans, plays important roles in the inter-ocean water exchange and regional or even global climate variability. The Makassar Strait is the main inflow passage of the ITF, carrying about 77% of the total ITF volume transport. In this study, we analyze the simulated ITF in the Makassar Strait in the Simple Ocean Data Assimilation version 3(SODA3) datasets. A total of nine ensemble members of the SODA3 datasets, of which are driven by different surface forcings and bulk formulas, and with or without data assimilation, are used in this study. The annual mean water transports(i.e.,volume, heat and freshwater) are related to the combination of surface forcing and bulk formula, as well as whether data assimilation is employed. The phases of the seasonal and interannual variability in water transports cross the Makassar Strait, are basically consistent with each other among the SODA3 ensemble members. The interannual variability in Makassar Strait volume and heat transports are significantly correlated with El Ni?oSouthern Oscillation(ENSO) at time lags of-6 to 7 months. There is no statistically significant correlation between the freshwater transport and the ENSO. The Makassar Strait water transports are not significantly correlated with the Indian Ocean Dipole(IOD), which may attribute to model deficiency in simulating the propagation of semiannual Kelvin waves from the Indian Ocean to the Makassar Strait.

关键词： Indonesian Throughflow Simple Ocean Data Assimilation(SODA) El Ni?o-Southern Oscillation(ENSO) Indian Ocean Dipole(IOD) data assimilation

A Sharding Scheme Based on Graph Partitioning Algorithm for Public Blockchain

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Computer Modeling in Engineering & Sciences 2024年第6期139卷 3311-3327页

作者： shujiang Xu Ziye Wang Lianhai Wang Miodrag J.Mihaljevi′c Shuhui Zhang Wei Shao Qizheng Wang Key Laboratory of Computing Power Network and Information Security Ministry of EducationShandong Computer Science CenterQilu University of Technology(Shandong Academy of Sciences)Jinan250014China Shandong Provincial Key Laboratory of Computer Networks Shandong Fundamental Research Center for Computer ScienceJinan250014China Mathematical Institute The Serbian Academy of Sciences and ArtsBelgrade11000Serbia

Blockchain technology,with its attributes of decentralization,immutability,and traceability,has emerged as a powerful catalyst for enhancing traditional industries in terms of optimizing business processes.However,transaction performance and scalability has become the main challenges hindering the widespread adoption of blockchain.Due to its inability to meet the demands of high-frequency trading,blockchain cannot be adopted in many scenarios.To improve the transaction capacity,researchers have proposed some on-chain scaling technologies,including lightning networks,directed acyclic graph technology,state channels,and shardingmechanisms,inwhich sharding emerges as a potential scaling technology.Nevertheless,excessive cross-shard transactions and uneven shard workloads prevent the sharding mechanism from achieving the expected aim.This paper proposes a graphbased sharding scheme for public blockchain to efficiently balance the transaction distribution.Bymitigating crossshard transactions and evening-out workloads among shards,the scheme reduces transaction confirmation latency and enhances the transaction capacity of the blockchain.Therefore,the scheme can achieve a high-frequency transaction as well as a better blockchain scalability.Experiments results show that the scheme effectively reduces the cross-shard transaction ratio to a range of 35%-56%and significantly decreases the transaction confirmation latency to 6 s in a blockchain with no more than 25 shards.

关键词： Blockchain sharding graph partitioning algorithm

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中波转播台自动播控系统分析

电声技术 2023年第9期47卷 1-3页

作者：杨树江甘肃省广播电视局天祝广播转播台甘肃武威733200

随着中波转播台数量的增多,如何高效控制中波转播台逐渐成为技术人员关注的重点。根据中波转播台的特点和需求,开发自动化、智能化的播控系统,可以通过实时监控、自动控制和智能预警方式,在减少人力成本和事故率的前提下,提高播出质量... 详细信息

随着中波转播台数量的增多,如何高效控制中波转播台逐渐成为技术人员关注的重点。根据中波转播台的特点和需求,开发自动化、智能化的播控系统,可以通过实时监控、自动控制和智能预警方式,在减少人力成本和事故率的前提下,提高播出质量。以自动播控系统为研究对象,介绍系统架构、软硬件配置,围绕系统应当具备的功能展开讨论,指出要想实现系统价值最大化,在开发自动播控系统时,要将重心放在储存数据、监测报警、倒换主备机以及定时开关机等功能上。

关键词：自动播控系统中波转播台软硬件配置监测报警

FaPEx柱萃取净化结合GC-MS法同时测定绿茶中20种农药残留

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中国酿造 2023年第4期42卷 256-261页

作者：董榕贵张洁杨树江贵州省检测技术研究应用中心贵州贵阳550014

该研究建立了FaPEx柱萃取净化结合气相色谱-质谱(GC-MS)检测绿茶中20种农药残留量的方法。样品粉碎后加水浸泡30 min,采用10 mL 1%醋酸-乙腈提取,经FaPEx柱萃取净化后浓缩至近干,加入1 mL乙酸乙酯复溶,经DB-5MS UI色谱柱(30 m×0.25 mm... 详细信息

该研究建立了FaPEx柱萃取净化结合气相色谱-质谱(GC-MS)检测绿茶中20种农药残留量的方法。样品粉碎后加水浸泡30 min,采用10 mL 1%醋酸-乙腈提取,经FaPEx柱萃取净化后浓缩至近干,加入1 mL乙酸乙酯复溶,经DB-5MS UI色谱柱(30 m×0.25 mm×0.25μm)分离,采用选择离子监测(SIM)模式,内标法进行定量。结果表明,20种农药在质量浓度0.01~0.50μg/mL范围内线性关系良好,相关系数R2均>0.99,在0.05 mg/kg、0.10 mg/kg、0.50 mg/kg三个质量浓度添加水平下,平均加标回收率为71.8%~118.2%,精密度试验结果的相对标准偏差(RSD)为1.63%~11.50%,方法检出限(LOD)为0.006~0.015 mg/kg,方法定量限(LOQ)为0.020~0.050 mg/kg。该方法准确度及精密度好,稳定性高,适用于绿茶中20种农药残留量的测定。

关键词： FaPEx 绿茶气相色谱-质谱农药残留

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复杂地质条件下厦门地铁盾构施工风险及对策

现代隧道技术 2016年第5期53卷 188-193,207页

作者：杨书江中铁隧道集团有限公司洛阳471009

厦门地铁工程地质条件极为复杂,盾构施工存在较大的风险。文章以厦门轨道交通1号线一期工程为例,从地质勘查、盾构选型、特殊地层掘进、盾构施工管理等方面对潜在的风险进行了深入分析,并结合笔者个人经验提出了相应对策,可供类似地层... 详细信息

厦门地铁工程地质条件极为复杂,盾构施工存在较大的风险。文章以厦门轨道交通1号线一期工程为例,从地质勘查、盾构选型、特殊地层掘进、盾构施工管理等方面对潜在的风险进行了深入分析,并结合笔者个人经验提出了相应对策,可供类似地层盾构法施工借鉴和参考。

关键词：盾构复杂地质风险对策

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猕猴桃黄酮提取工艺研究进展

食品安全导刊 2023年第4期 122-124页

作者：王可杨树江贵州省检测技术研究应用中心贵州贵阳550014

猕猴桃中黄酮类化合物是猕猴桃中含量较高的具有多酚结构的次生代谢产物,具有降血脂、降压、抗氧化等多种生物活性,在医药、食品、农业等领域有广阔的应用前景。本文对猕猴桃中黄酮的提取方法进行了综述和总结,旨在为猕猴桃黄酮的进一... 详细信息

猕猴桃中黄酮类化合物是猕猴桃中含量较高的具有多酚结构的次生代谢产物,具有降血脂、降压、抗氧化等多种生物活性,在医药、食品、农业等领域有广阔的应用前景。本文对猕猴桃中黄酮的提取方法进行了综述和总结,旨在为猕猴桃黄酮的进一步研究利用提供参考。

关键词：猕猴桃黄酮提取工艺

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中华文明国际传播形态变革及未来图景

甘肃社会科学 2024年第2期 60-69页

作者：聂书江中国政法大学光明新闻传播学院北京100088

世界交往理论为不同文明国际传播的研究提供了唯物史观。根据马克思交往理论,世界交往的频次和深度推动着不同文明国际传播形态的历史性演变。作为决定文明传播的物质基础,以跨国社交媒体为代表的新媒体及其革命性地使用,历史性地破解... 详细信息

世界交往理论为不同文明国际传播的研究提供了唯物史观。根据马克思交往理论,世界交往的频次和深度推动着不同文明国际传播形态的历史性演变。作为决定文明传播的物质基础,以跨国社交媒体为代表的新媒体及其革命性地使用,历史性地破解了西方文明神话“迷思”。在社交媒体的深度使用中,不同文明背景的使用者如同发现新大陆一样发现了另一个与西方媒体神话的不同版本的文明叙事。与此同时,文明力量变革重塑全球文明传播格局使其趋向于平衡。顺应世界文明交流互鉴的发展大势,中华文明国际传播新形态不但具有21世纪马克思主义新闻观的活的灵魂的指导,而且还具有世界数字平台新的基础,使其不但超越文化帝国主义,而且超越资本主义文明传播模式,超越文明传播中的冲突、隔阂,从而走向多元文明交流互鉴的新国际传播图景。

关键词：世界交往理论中华文明国际传播文化帝国主义马克思主义新闻观