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Genes & Diseases 2023年第6期10卷 2233-2236页

作者： Xiangjun Liu Jingang Gui Xiaolin Wang Laboratory of Tumor Immunology Beijing Pediatric Research InstituteBeijing Children's HospitalCapital Medical UniversityNational Center for Children's Health(NCCH)Beijing 100045China

Severe acute respiratory syndrome coronavirus-2(SARSCoV-2),which causes coronavirus disease 2019(COVID-19)and initially infects epithelial cells of the upper respiratory tract,has recently caused a global health emergency and is still a potential threat to humans.1 Multiple studies have suggested alterations in the immune system,including excessive neutrophil activation and lymphopenia,and excessive inflammatory responses as the key mechanisms for severesymptoms.2However,which cell types contribute to excessive inflammation remains to be explored.Further analysis of human blood immune cells provides insights into the coordinated response to SARSCoV-2 infections and is a significant task for restraining the virus and controlling disease progression.

关键词： neutrophil respiratory alterations

Review in life cycle assessment of biomass conversion through pyrolysis-issues and recommendations

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Green Chemical Engineering 2022年第4期3卷 304-312页

作者： Zhaozhuo Yu Haoxiang Mab Xiangjun Liu Miao Wang Junqi Wang School of Human Settlements and Civil Engineering Xi'an Jiaotong UniversityXi'an710049China Deep Sea Engineering Division Institute of Deep-Sea Science and EngineeringChinese Academy of SciencesSanya572000China

Biomass,widespread and carbon-neutral energy,can provide electric energy and replace fossil fuel-derived production.Pyrolysis is the main way of converting biomass to different bioenergy products with the consumption of material and energy,which will cause environmental impacts.To confirm the actual environmental impact of biomass conversion,life cycle assessment(LCA)is used for analyzing the process.Due to choosing different LCA methods,the results for the same thing in different reports will show obvious fluctuation.This review is devoted to providing recommendations on how to handle methodological issues when analyzing LCA study,by which researchers can better realize the similarities and differences in biomass conversion system.In this review,multiple clarifications and methodological recommendations on the four steps of the LCA process(including goal and scope definition,life cycle inventory,life cycle impact assessment,and interpretation)are provided.Furthermore,the LCA results are discussed systematically,in which the global warming potential gets extra attention.Meanwhile,different biomass feedstocks are divided into agricultural residues,forest residues,and microalgae carefully.Finally,the current challenges and future framework of biomass conversion are expounded in detail from the perspective of LCA.

关键词： Life cycle assessment Pyrolysis Global warming potential Agricultural residues Forest residues Microalgae

Experimental on the pore structure characteristics of Longmaxi Formation shale in southern Sichuan Basin,China

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Petroleum 2021年第2期7卷 135-141页

作者： Linlin Huang Xiangjun Liu Jian Xiong Lixi Liang State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengduChina

In this paper,the pore structure characteristics of shale samples from the Lower Silurian Longmaxi Formation in South of Sichuan Basin of China were investigated by total organic carbon(TOC)content determination,X-ray diffraction(XRD),scanning electron microscope(SEM),low pressure nitrogen adsorption(LPNA)and high pressure mercury injection(HPMI).The fractal dimension of shale samples was calculated based on Frenkel-Halsey-Hill(FHH)model and thermodynamic relation model.The results showed that the major mineral compositions of shales were quartz and clay content.Organic pores,intergranular pores,intragranular pores,microfractures were widely developed in the shale samples,of which organic pores were the most developed.The pore morphology was mainly ink bottle-shaped pores and slit-shaped pores;the pore size distribution of shale samples was complex with multiple distribution peaks,the pore size between 3 and 40 nm occupied the most of storage space.The fractal dimension Dn1 of pores between 2 nm and 10 nm was 2.7177e2.7933,while fractal dimension Dn2 of pores between 10 nm and 50 nm was 2.2439e2.5468.The fractal dimension Dr of macropores calculated by the thermodynamic model was 2.6401e2.7025.

关键词： The Longmaxi Formation Shale Pore morphology Pore size distribution Fractal dimension

Influences of bedding characteristics on the acoustic wave propagation characteristics of shales

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Petroleum 2021年第1期7卷 33-38页

作者： Jian Xiong Kaiyuan liu Xiangjun Liu Lixi Liang Chongyang Zhang State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengduChina Geophysical Technology Research Center of BGP INC. China National Petroleum CorporationChengduChina

The acoustic response characteristics of shales were investigated by the acoustic transmission experiment,which is the basis of solving geological and engineering problems using the seismic or logging information during the process of the exploration and development of shale gas reservoirs.Based on the theory of acoustic wave and the background of acoustic transmission experiment,the initial condition,vibration source condition,boundary condition and stability condition were constructed,and the numerical simulation of acoustic transmission experiment of shales were completed through Matlab programming.The results show that under the same bedding angle,the acoustic time and attenuation coefficient of shales shown positive correlation with the bedding density;whereas under the same bedding density,the variation laws of the acoustic time and the attenuation coefficient of shales were more complex with the change of the bedding angle,that is,the acoustic time and attenuation coefficient of shales increased first,then decreased and then increased again with the increase of the bedding angle.

关键词： Shale Bedding characteristics Acoustic wave Numerical simulation

Logging prediction and evaluation of fracture toughness for the shales in the Longmaxi Formation, Southern Sichuan Basin

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Petroleum 2021年第3期7卷 254-262页

作者： Jian Xiong Kaiyuan liu Changyou Shi Xiangjun Liu Linlin Huang State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengduChina Geophysical Technology Research Center of BGP INC China National Petroleum CorporationChengduChina

The mode-I fracture toughness is of great significance for evaluating the fracturing ability of shale reservoirs.In this study,the mode-I fracture toughness of the shale in the Lower Silurian Longmaxi Formation,Southern Sichuan Basin was determined with the Cracked Chevron Notched Brazilian Disc(CCNBD).Based on the experimental data,the relationships among the mode-I fracture toughness,the density,the acoustic time and the clay mineral content were analyzed.The shale samples for fracture toughness test from cores were commonly limited,the investigation of fracture toughness using well logs was necessary.Therefore,a prediction model was proposed by correlating the fracture toughness with well logs responses.The results indicate that the fracture toughness of shale samples is from 0.4744 MPa$m1/2 to 1.0607 MPa$m1/2 with an average of 0.7817 MPa$m1/2,indicating that the anisotropy of fracture toughness of the Longmaxi Formation shale.The clay mineral content and the density have a positive effect on the fracture toughness,whereas the acoustic time plays a negative role on the fracture toughness.The clay mineral content has an important effect on the relationships among fracture toughness,acoustic time and density.The prediction model can provide continuous data of mode-I fracture toughness along the wellbore for field hydraulic fracturing operation,and it has certain guiding significance in the exploration and development of oil and gas reservoirs.

关键词： Rock mechanics Longmaxi formation shale CCNBD Mode-I fracture Toughness Prediction method

Experimental study on the acoustic propagation and anisotropy of coal rocks

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Petroleum 2022年第1期8卷 31-38页

作者： Linlin Huang Xiangjun Liu Sen Yan Jian Xiong Haiming He Peng Xiao State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengduChina

In order to study the propagation laws of acoustic wave of coal samples from the Upper Permian Xuanwei Formation in the east of Yunnan Province,China,under saturated water and dry conditions,the basic physical parameters,acoustic parameters and anisotropic parameters were obtained through the experiments.Based on FFT and wavelet analysis theory,the spectral characteristics of coal samples under different conditions were studied.The results show that physical parameters of coal samples in different directions have different values,that is,the anisotropy of coal samples is obvious.When the coal samples are saturated with water,the acoustic velocities and the attenuation coefficient increase,whereas the dominant frequency decreases.The signal amplitude of the frequency domain significantly decreases,that is,the internal structure of coal samples is damaged.The P-wave velocity and S-wave velocity increase with the increase of the confining pressure,whereas the anisotropy parameters decrease with the increase of the confining pressure.Overall,this study provides the basis to understand basic acoustic information and anisotropy characteristics of coal samples.

关键词： Upper permian xuanwei formation Coal Acoustic wave propagation Frequency spectrum characteristics Anisotropy

An Intrusion Detection Method for Advanced Metering Infrastructure System Based on Federated Learning

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Journal of Modern Power Systems and Clean Energy 2023年第3期11卷 927-937页

作者： Haolan Liang Dongqi liu xiangjun Zeng Chunxiao Ye School of Electrical and Information Engineering Changsha University of Science and TechnologyChangsha 410114China Hunan Institute of Engineering Xiangtan 411104China

An advanced metering infrastructure(AMI)system plays a key role in the smart grid(SG),but it is vulnerable to cyberattacks.Current detection methods for AMI cyberattacks mainly focus on the data center or a distributed independent node.On one hand,it is difficult to train an excellent detection intrusion model on a self-learning independent node.On the other hand,large amounts of data are shared over the network and uploaded to a central node for training.These processes may compromise data privacy,cause communication delay,and incur high communication costs.With these limitations,we propose an intrusion detection method for AMI system based on federated learning(FL).The intrusion detection system is deployed in the data concentrators for training,and only its model parameters are communicated to the data center.Furthermore,the data center distributes the learning to each data concentrator through aggregation and weight assignments for collaborative learning.An optimized deep neural network(DNN)is exploited for this proposed method,and extensive experiments based on the NSL-KDD dataset are carried out.From the results,this proposed method improves detection performance and reduces computation costs,communication delays,and communication overheads while guaranteeing data privacy.

关键词： Federated learning(FL) advanced metering infrastructure(AMI)system intrusion detection data concentrator

Origin mechanism of pitting corrosion induced by cerium inclusions

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稀土学报:英文版 2023年第9期41卷 1448-1458,I0007页

作者： Xiangjun Liu Changqiao Yang Huiping Ren Yiming Li Zili Jin Fang Zhang Jichun Yang School of Materials and Metallurgy Inner Mongolia University of Science and TechnologyBaotou 014010China Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resource Inner Mongolia University of Science and TechnologyBaotou 014010China

In this paper,the origin mechanism of pitting corrosion induced by Ce_(2)O_(3),Ce_(2)O_(2)S,and CeAlO_(3) inclusions in a microalloyed steel was investigated by field emission scanning electron microscopy with energy dispersive spectroscopy and electron backscattered diffraction,conductivity atomic force microscopy,immersion test,and first-principles calculation.The results show that the Ce_(2)O_(3),Ce_(2)O_(2)S,and CeAlO_(3) inclusions are non-conductive,which are impossible to form corrosion couples with the steel matrix.There are no obvious lattice distortion zones in the steel matrix around the Ce_(2)O_(3),Ce_(2)O_(2)S,and CeAlO_(3) inclusions,so it is difficult to form micro-galvanic corrosion near the Ce inclusion.The order of work functions of the Ce inclusions and the steel matrix from small to large is Ce_(2)O_(2)S

关键词： Microalloyed steel Rare earth inclusion Conductivity atomic force microscopy First-principles calculation Pitting corrosion

Strengthened Indian summer monsoon brought more rainfall to the western Tibetan Plateau during the early Holocene

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Science Bulletin 2019年第20期64卷 1482-1485页

作者： Xiangjun Liu Xiaojian Zhang Yanluan Lin Liya Jin Fahu Chen College of Geography and Environmental Science Northwest Normal UniversityLanzhou730070China Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of SciencesBeijing100101China School of Geography and Ocean Science Nanjing UniversityNanjing210023China Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System Scienceand Joint Center for Global Change StudiesTsinghua UniversityBeijing100084China School of Atmoshpheric Sciences Chengdu University of Information TechnologyChengdu610225China CAS Key Laboratory of Alpine Ecology Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing100101China

The Tibetan Plateau(TP)is considered to be the‘‘Third Pole”of the earth because of its huge area(5 million km2),its high elevation(>4000 m average altitude),and the presence of more than 100,000 km2 of glaciers in this northern mid-latitude region.As a result of these factors,the TP influences both short-term regional and large-scale atmospheric circulation and long-term climate change[1].More than ten large rivers originate from the TP and constitute an essential water supply for nearly one sixth of the global population.Hence the TP is often referred to as‘‘the water tower of Asia”[1,2].Variations of summer rainfall over the TP greatly impact inland closed lakes,river discharge,glaciers,plant phenology,and natural hazards[2].

关键词： China Strengthened Indian summer monsoon brought more rainfall to the western Tibetan Plateau during the early Holocene western

Aquatic Species Dominate Organic Matter in Qinghai Lake during the Holocene:Evidence from Eolian Deposits around the Lake

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Journal of Earth Science 2017年第3期28卷 484-491页

作者： Fangming Zeng Xiangjun Liu Xiangzhong Li Chongyi E Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Institute of Salt LakesChinese Academy of Sciences State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Key Laboratory of Physical Geography and Environmental Processes of Qinghai Province Qinghai Normal University

Total organic carbon（TOC） in lake sediments and its stable carbon isotope（δ（13）C（org）） are widely applied to investigate paleoenvironmental changes even though their implications are complicated and multi-explanatory. Organic geochemistry studies of lake sediments from Qinghai Lake have been investigated, but some interpretations are controversial. In this study, TOC of one Holocene eolian section and δ（13）C（org） of three eolian sections were studied around Qinghai Lake. Results indicate that the TOC content in eolian deposits was low during the Early Holocene, and gradually increased to high values during the Middle and Late Holocene. The variation in TOC content of eolian deposits is different from that in the lacustrine sequence from Qinghai Lake during the Holocene. The δ（13）C（org） values in the eolian sections were relatively stable, with oscillation amplitudes of 4‰（ranging from-25.8‰ to-22.1‰）, in contrast to 10‰ variation s in δ（13）C（org） values（varying from-30‰ to-20‰） in lacustrine sediments. Through comparison of TOC and δ（13）C（org） values between eolian deposits and lacustrine sediments, we can confirm indications that the organic matter in Qinghai Lake sediments during the Holocene was primarily a contribution of the aquatic species in the lake. This is significant for understanding the origin of organic matter in lake sediments on the northeastern Qinghai-Tibetan Plateau and for paleoenvironmental inferences using such proxies.

关键词： Qinghai Lake total organic carbon（TOC） organic carbon isotope（δ（13）C（org）） Qinghai-Tibetan Plateau