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Chinese Physics Letters 2021年第2期38卷 62-68页

作者： Weilun Yuan shuai yin Fan Zhong State Key Laboratory of Optoelectronic Materials and Technologies School of PhysicsSun Yat-sen UniversityGuangzhou 510275China

Symmetry breaking plays a pivotal role in modern *** self-similarity is also a symmetry,and appears ubiquitously in nature,a fundamental question arises as to whether self-similarity breaking makes sense or ***,by identifying an important type of critical fluctuation,dubbed‘phases fluctuations’,and comparing the numerical results for those with self-similarity and those lacking self-similarity with respect to phases fluctuations,we show that self-similarity can indeed be broken,with significant consequences,at least in nonequilibrium *** find that the breaking of self-similarity results in new critical exponents,giving rise to a violation of the well-known finite-size scaling,or the less well-known finite-time scaling,and different leading exponents in either the ordered or the disordered phases of the paradigmatic Ising model on two-or three-dimensional finite lattices,when subject to the simplest nonequilibrium driving of linear heating or cooling through its critical *** is in stark contrast to identical exponents and different amplitudes in usual critical *** results demonstrate how surprising driven nonequilibrium critical phenomena can *** application of this theory to other classical and quantum phase transitions is also anticipated.

关键词： similarity breaking critical

Ultrathin nanoporous metal electrodes facilitate high proton conduction for low-Pt PEMFCs

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Nano Research 2021年第8期14卷 2681-2688页

作者： shuai Shi Xianglong Wen Qinqin Sang shuai yin Kaili Wang Jian Zhang Min Hu Huiming yin Jia He Yi Ding Tianjin Key Laboratory of Advanced Functional Porous Materials Institute for New Energy Materials&Low-Carbon TechnologiesSchool oj Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China

Design of catalyst layers(CLs)with high proton conductivity in membrane electrode assemblies(MEAs)is an important issue for proton exchange membrane fuel cells(PEMFCs).Herein,an ultrathin catalyst layer was constructed based on Pt-decorated nanoporous gold(NPG-Pt)with sub-Debye-length thickness for proton *** the absence of ionomer incorporation in the CLs,these integrated carbon-free electrodes can deliver maximum mass-specific power density of 198.21 and 25.91 kW·gPt^(-1) when serving individually as the anode and cathode,at a Pt loading of 5.6 and 22.0 pg·cm^(-2),respectively,comparable to the best reported nano-catalysts for ***-depth quantitative experimental measurements and finite-element analyses indicate that improved proton conduction plays a critical role in activation,ohmic and mass transfer polarizations.

关键词： nanoporous metal electrode proton exchange membrane fuel cell(PEMFC) ultrathin catalyst layer proton conduction dealloying

Recent advances in evaluation, evolution and quantitative characterization of tight reservoirs: Introduction

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Energy Geoscience 2022年第4期3卷 381-382页

作者： Xiangchun Chang shuai yin Shandong University of Science and Technology China Xi'an Shiyou University China

Unconventional resources will significantly add to the petro-leum reserves and their contribution to global gas/oil production is expected to increase to 25%over the next two ***,unconventional reservoirs of coal methane,shale gas,tight sand-stone gas and gas hydrate have complex pore structures and are typically tight with porosity and permeability much lower than conventional reservoirs(Pang et al.,2022;yin et al.,2018a,2018b).The characterization of the pore structure and the study of micro-scale multiphase flow mechanism are extremely impor-tant for the understanding of unconventional *** studies show that emerging methodologies have become the most powerful in characterizing the dynamics of liquids in porous media from the nano-pore to fracture scale.

关键词： reservoirs shale evolution

Design and Hardware-in-the-loop Validation:A Fractional Full Feed-forward Method for Grid Voltage in LCL Grid-connected Inverter Systems

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CSEE Journal of Power and Energy Systems 2023年第5期9卷 1720-1731页

作者： Qingyi Wang Binlei Ju Yudi Lei Dan Zhou shuai yin Danyun Li the School of Automation China University of Geosciencesand Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex SystemsWuhan 430074China.

The harmonic disturbance in the background grid is a problem that must be considered in the design of a gridconnected ***,the full feed-forward method cannot completely suppress the harmonic disturbance in theory and is sensitive to *** tackle these problems,a fractional full feed-forward method of grid voltage is proposed in this ***,the mathematical model of the full feed-forward method is deduced,and the differences with the theoretical solution,which can suppress all harmonics,are ***,the parameter equation,the harmonic suppression performance,stability analysis and the implementation process of this method are *** with the full feed-forward method,the proposed method not only further improves the harmonic suppression performance,but also reduces the order of the mathematical model of the differential term in the feed-forward *** addition,the proposed method can be used to flexibly design feed-forward coefficients by selecting the order of suppressed ***,the proposed method is validated by a hardware-in-the-loop experiment on a MT real-time control platform NI PXIE-1071.

关键词： Fractional differential full feed-forward method hardware-in-the-loop LCL inverter

Decay rate of Larix gmelinii coarse woody debris on burned patches in the Greater Khingan Mountains

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Journal of Forestry Research 2021年第6期32卷 2349-2363页

作者： Shubo Huang Lixiang Wen shuai yin Meng Guo Fangbing Yu Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains School of Geographical SciencesNortheast Normal UniversityMinistry of EducationChangchun130024People’s Republic of China Center for Global Environmental Research National Institute for Environmental StudiesTsukuba3058506Japan

The decomposition of coarse woody debris(CWD)affects the energy flow and nutrient cycling in forest *** studies on CWD have focused on the input,decomposition,reserve dynamics,and CWD functions,but coarse woody debris decomposition is complex and the results from different regions vary *** is not clear which factors affect decay rate(k),especially at different decomposition *** this study,a single-exponential decay model was used to analyze the characteristics of CWD decomposition in Larix gmelinii forests over the 33 years following a fire in the Greater Khingan *** results show that the decay rate of coarse woody debris was positively correlated to decay *** average decomposition rate was 0.019,and 41 years and 176 years are needed for a 50%and 95%mass loss,*** nutrient content,density,and water content could explain the variance in the decay rate(~42%)of the decay factors such as amount of leaching,degree of fragmentation,respiration of the debris,and biotransformation,and varied significantly between different decay *** the space-time substitution method,this study arranged the coarse woody debris of different mortality times to form a 33 year chronosequence which revealed the decomposition *** was concluded that the decay rate was mainly explained by structural component of the debris and its nitrogen and water *** paper quantifies the indicators affecting CWD decay to explain the decomposition process.

关键词： Coarse woody debris Decay rate Space–time substitution Boreal forest Fire disturbance

Restoration of the pre-Jurassic paleogeomorphology and its control on hydrocarbon distribution in western Ordos Basin

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Energy Geoscience 2022年第4期3卷 485-494页

作者： Hui Yuan shuai yin Li Dong Chengqian Tan School of Earth Science and Engineering Xi'an Shiyou UniversityXi'an710065China SINOPEC Petroleum Exploration and Production Research Institute Beijing100083China

In recent years,the discovery of the Jurassic oil reservoirs in the Western Thrust Belt of the Ordos Basin reveals that the Jurassic formation in this area has huge oil and gas *** pre-Jurassic paleo-geomorphology plays a vital role in the formation of the Jurassic oil *** this paper,the impression method is applied to restore the pre-Jurassic paleogeomorphology of the Hongde area in the western Ordos Basin,using a large number of drilling,logging,well testing and the latest 3D seismic *** pre-Jurassic paleogeomorphological units in the study area can be categorized into five groups,including ancient channel valley,ancient terrace,slope,interchannel mound,and low residual mound *** oil reservoirs are mainly distributed in highland areas such as slope belts and low residual mounds,the main areas where hydrocarbons *** addition,the branch ditches in the study area are developed to the southeast and merged into the Ganshan ancient *** sandstone in the confluence area of the branch gully is well sorted and connected under frequent scouring by the *** sand bodies of good connectivity therefore form a drainage system for long-term hydrocarbon *** formation of the Jurassic reservoirs in the study area is mainly affected by sedimentary facies,deposition location,and hydrocarbon migration pathway(or fault)of pre-Jurassic *** results from this study can be useful for the prediction of the Jurassic sweet spots in the western margin of the Ordos Basin.

关键词： Paleogeomorphology Sedimentary facies Hydrocarbon enrichment Jurassic reservoirs Sweet spots Ordos basin

Vegetation Phenology in Permafrost Regions of Northeastern China Based on MODIS and Solar-induced Chlorophyll Fluorescence

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Chinese Geographical Science 2021年第3期31卷 459-473页

作者： WEN Lixiang GUO Meng yin shuai HUANG Shubo LI Xingli YU Fangbing Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains Ministry of EducationSchool of Geographical SciencesNortheast Normal UniversityChangchun 130024China Centers for Global Environmental Research National Institute for Environmental StudiesTsukuba 305-8555Japan

Vegetation phenology is an indicator of vegetation response to natural environmental changes and is of great significance for the study of global climate change and its impact on terrestrial *** normalized difference vegetation index(NDVI)and enhanced vegetation index(EVI),extracted from the Moderate Resolution Imaging Spectrometer(MODIS),are widely used to monitor phenology by calculating land surface ***,the applicability of the vegetation index based on‘greenness'to monitor photosynthetic activity is hindered by poor observation conditions(e.g.,ground shadows,snow,and clouds).Recently,satellite measurements of solar-induced chlorophyll fluorescence(SIF)from OCO-2 sensors have shown great potential for studying vegetation ***,we tested the feasibility of SIF in extracting phenological metrics in permafrost regions of the northeastern China,exploring the characteristics of SIF in the study of vegetation phenology and the differences between NDVI and *** results show that NDVI has obvious SOS advance and EOS lag,and EVI is closer to *** growing season length based on SIF is often the shortest,while it can represent the true phenology of vegetation because it is closely related to *** is more sensitive than the traditional remote sensing indices in monitoring seasonal changes in vegetation phenology and can compensate for the shortcomings of traditional vegetation *** also used the time series data of MODIS NDVI and EVI to extract phenological metrics in different permafrost *** results show that the length of growing season of vegetation in predominantly continuous permafrost(zone I)is longer than in permafrost with isolated taliks(zone II).Our results have certain significance for understanding the response of ecosystems in cold regions to global climate change.

关键词： vegetation phenology permafrost Moderate Resolution Imaging Spectrometer(MODIS) solar-induced chlorophyll fluorescence(SIF) northeastern China

Electrocatalysts with atomic-level site for nitrate reduction to ammonia

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Journal of Energy Chemistry 2024年第9期96卷 642-668页

作者： shuai yin Rong Cao Yifan Han Jiachangli Shang Jing Zhang Wei Jiang Guigao Liu National Special Superfine Powder Engineering Research Center School of Chemistry and Chemical EngineeringNanjing University of Science and TechnologyNanjing 210094JiangsuChina School of Pharmacy Jiangsu UniversityZhenjiang 212013JiangsuChina

Ammonia(NH_(3))is an important raw material for modern agriculture and industry,being widely demanded to sustain the sustainable development of modern ***,the industrial production methods of NH_(3),such as the traditional Haber-Bosch process,have drawbacks including high energy consumption and significant carbon dioxide *** recent years,the electrocatalytic nitrate reduction reaction(NO_(3)RR)powered by intermittent renewable energy sources has gradually become a multidisciplinary research hotspot,as it allows for the efficient synthesis of NH_(3)under mild *** this review,we focus on the research of electrocatalysts with atomic-level site,which have attracted attention due to their extremely high atomic utilization efficiency and unique structural characteristics in the field of NO_(3)***,we introduce the mechanism of nitrate reduction for ammonia synthesis and discuss the in-situ characterization techniques related to the mechanism ***,we review the progress of the electrocatalysts with atomic-level site for nitrate reduction and explore the structure-activity relationship to guide the rational design of efficient ***,the conclusions of this review and the challenges and prospective of this promising field are presented.

关键词： Ammonia synthesis Nitrate reduction Electrocatalysts with atomic-level site Reaction mechanism In-situ characterization techniques

Analyzing CO_(2) concentration changes and their influencing factors in Indonesia by OCO-2 and other multi-sensor remote-sensing data

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International Journal of Digital Earth 2018年第8期11卷 825-844页

作者： shuai yin Xiufeng Wang Heri Santoso Hiroshi Tani Guosheng Zhong Zhongyi Sun Graduate School of Agriculture Hokkaido UniversitySapporoJapan Research Faculty of Agriculture Hokkaido UniversitySapporoJapan c Indonesian Oil Palm Research Institute MedanNorth SumatraIndonesia

We used OCO-2 products and considered three factors that potentially affect CO_(2) concentration in Indonesia:sea surface temperature(SST),forest fires and *** 2014 to 2016,CO_(2) concentration in Indonesia showed a trend of increase,which is consistent with the global increase reported by the Greenhouse Gases Observing Satellite(GOSAT)*** an archipelago country,the results indicate that SST has a direct effect on the CO_(2) concentration in *** changing exhibits similar fluctuations;meanwhile,CO_(2) concentration and SST also presented positive *** 2015,the number of fire hotspots suddenly increased to 140,699,because of occurrence of the worst forest *** to special geographic conditions,forest fires did not induce CO_(2) concentration changes in Indonesia,but CO_(2) concentration in the corresponding islands showed a trend of ***_(2) concentration increased in Kalimantan during the occurrence of forest fire in September–October 2014,and CO_(2) concentration increased in Kalimantan and Sumatra during the occurrence of forest fire in September–October *** indices were stable and presented no correlation with CO_(2) *** study demonstrated that OCO-2 is capable of monitoring CO_(2) concentration at a regional scale;additionally,an effective method for using OCO-2 Level 2 products is proposed.

关键词： GOSAT Kalimantan SST Sumatra X_(CO_(2))