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Intelligent geochemical interpretation of mass chromatograms:Based on convolution neural network

Petroleum science 2024年第2期21卷 752-764页

作者： Kai-Ming su Jun-Gang lu Jian Yu Zi-Xing lu.shi-Jia Chen Hubei Key Laboratory of Petroleum Geochemistry and Environment Wuhan430100HubeiChina College of Resources and Environment Yangtze UniversityWuhan430100HubeiChina school of Geoscience and Technology Southwest Petroleum UniversityChengdu610500SichuanChina Changqing Oilfield Company PetroChinaXi'an710021ShaanxiChina

Gas chromatography-mass spectrometry(GC-Ms)is an extremely important analytical technique that is widely used in organic *** is the only approach to capture biomarker features of organic matter and provides the key evidence for oil-source correlation and thermal maturity ***,the conventional way of processing and interpreting the mass chromatogram is both timeconsuming and labor-intensive,which increases the research cost and restrains extensive applications of this *** overcome this limitation,a correlation model is developed based on the convolution neural network(CNN)to link the mass chromatogram and biomarker features of samples from the Triassic Yanchang Formation,Ordos Basin,*** this way,the mass chromatogram can be automatically *** research first performs dimensionality reduction for 15 biomarker parameters via the factor analysis and then quantifies the biomarker features using two indexes(*** and PMI)that represent the organic matter thermal maturity and parent material type,***,training,interpretation,and validation are performed multiple times using different CNN models to optimize the model structure and hyper-parameter setting,with the mass chromatogram used as the input and the obtained MI and PMI valu.s for supervision(label).The optimized model presents high accuracy in automatically interpreting the mass chromatogram,with R2valu.s typically above 0.85 and0.80 for the thermal maturity and parent material interpretation results,*** significance of this research is twofold:(i)developing an efficient technique for geochemical research;(ii)more importantly,demonstrating the potential of artificial intelligence in organic geochemistry and providing vital references for future related studies.

关键词： Organic geochemistry Biomarker Mass chromatographic analysis Automated interpretation Convolution neural network Machine learning

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Conversion of LiPss Accelerated by Pt-Doped Biomass-Derived Hyphae Carbon Nanobelts as self-supporting Hosts for Long-Lifespan Li-s Batteries

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Energy & Environmental Materials 2024年第3期7卷 49-58页

作者： Fengfeng Han Liwen Fan Xinzhi Ma Huiqing lu lu Li Xitian Zhang Lili Wu Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Physics and Electronic EngineeringHarbin Normal UniversityHarbin 150025China Key Laboratory of Molecular Cytogenetics and Genetic Breeding of Heilongjiang Province School of Life Science and TechnologyHarbin Normal UniversityHarbin 150025China

Rechargeable Li-s batteries(LsBs)are emerging as an important alternative to lithium-ion batteries(LIBs),owing to their high energy densities and low cost;yet sluggish redox kinetics of LiPss results in inferior cycle ***,we prepared multifunctional self-supporting hyphae carbon nanobelt(HCNB)as hosts by carbonization of hyphae balls of Rhizopus,which could increase the s loading of the cathode without sacrificing reaction *** platinum(Pt)nanoparticles were introduced into HCNBs(PtHCNBs)by ion-beam sputtering *** on the X-ray photoelectron spectroscopy analyses,the introduced trace Pt regulated the local electronic states of heteroatoms in *** kinetics investigation combined with operando Raman measurements revealed the accelerated reaction mechanics of sulfur *** from the synergistic catalytic effect and the unique structures,the as-prepared PtHCNB/MWNCT/s cathodes delivered a stable capacity retention of 77%for 400 cycles at 0.5 C with a sulfur loading of 4.6 mg cm^(-2).More importantly,remarkable cycling performance was achieved with an high areal s loading of 7.6 mg cm^(-2).This finding offers a new strategy to prolong the cycle life of LsBs.

关键词： high areal capacity high s loading hyphae carbon nanobelt lithium-sulfur battery operando Raman

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A divergent pattern in functional connectivity: a transdiagnostic perspective

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Neural Regeneration Research 2024年第9期19卷 1885-1886页

作者： lu Zhang Lorenzo Pini Padova Neuroscience Center Universitàdegli Studi di PadovaPadovaItaly

Functional magnetic resonance imaging(fMRI)is a popular tool used to investigate not only how the brain responds to specific stimuli during sensorimotor or cognitive tasks,but also brain activity at *** physics beyond... 详细信息

关键词： pattern connectivity functional

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Ionic liquid-trimetallic electrocatalytic system for C–O bond cleavage in lignin model compounds and lignin under ambient conditions

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Nano Research 2024年第4期17卷 2420-2428页

作者： Guangyong Liu Yumiao lu JunFeng lu Yanlei Wang shijing Liang Hongyan He Lilong Jiang National Engineering Research Center of Chemical Fertilizer Catalyst Fuzhou UniversityFuzhou 350002China CAs Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex SystemsBeijing Key Laboratory of Ionic Liquids Clean ProcessInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Longzihu New Energy Laboratory Zhengzhou Institute of Emerging Industrial TechnologyZhengzhou 450000China

Electrocatalytic depolymerization of lignin into value-added chemicals offers a promising technique to make biorefining ***,we report a robust trimetallic PdNiBi electrocatalyst for reductive C–O bond cleavage of different lignin model dimers and oxidized lignin under mild *** reduction reaction proceeds with complete substrate conversion and excellent yields toward monomers of phenols(80%–99%)and acetophenones(75%–96%)in the presence of an ionic liquid electrolyte with operational *** experimental investigations together with density functional theory(DFT)calculations reveal that the outstanding performance of the catalyst results from the synergistic effect of the metal elements,which facilitates the easier formation of a key Cαradical intermediate and the facile desorption of the as-formed products at the *** results open up new opportunities for lignin valorization through the green electrocatalytic approach.

关键词： electrocatalytic depolymerization lignin Ionic liquids density functional theory(DFT)calculation

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Paradigm shifts of climate science for climate solutions

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The Innovation 2024年第4期5卷 25-26页

作者： Jianhua lu school of Atmospheric sciences Sun Yat-sen University(SYSU)&Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519082China

WHY ARE PARADIGM sHIFTs OF CLIMATE sCIENCE NEEDED?Climate science has been playing a central role in shaping the global consensus on climate *** the immense complexity of the Earth’s climate system,climate science has primarily concentrated on advancing scientific understanding of anthropogenic climate change while providing viable options for adaptation and mitigation policies to governments.1 For instance,climate research on the uncertainties in climate sensitivity estimation,patterns of global warming,and the attributions of global temperature and precipitation changes has yielded many significant findings on fundamental problems,resulting in substantial and robust progress in climate *** of these advancements are encapsulated in a series of IPCC reports,1 on which the global consensus on climate actions and solutions is based。

关键词： warming Earth instance

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Improving Optimal Fingerprinting Methods Requires a Viewpoint beyond statistical science

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Advances in Atmospheric sciences 2024年第10期41卷 1869-1872页

作者： Jianhua lu school of Atmospheric sciences Sun Yat-sen University(SYSU)&Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519082China

While being successful in the detection and attribution of climate change,the optimal fingerprinting method(OFM)may have some limitations from a physics-and-dynamics-based ***,an analysis is made on the linearity,noninteraction,and stationary-variability assumptions adopted by *** is suggested that furthering OFM needs a viewpoint beyond statistical science,and the method should be combined with theoretical tools in the dynamics and physics of the Earth system,so as to be applied for the detection and attribution of nonlinear climate change including tipping elements within the Earth system.

关键词： optimal fingerprinting detection and attribution nonlinearity interaction between climate change and variability non-stationary climate variability

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Hall Algebras and Quantum symmetric Pairs of Kac-Moody Type Ⅱ

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Acta Mathematica sinica,English series 2024年第3期40卷 806-822页

作者： Ming lu Run Ze sHANG Department of Mathematics Sichuan UniversityChengdu 610064P.R.China

We extend the ■Hall algebra realization of ■quantum groups arising from quantum symmetric pairs,which establishes an injective homomorphism from the universal ■quantum group of Kac-Moody type to the ■Hall algebra ... 详细信息

关键词： Quantum symmetric pairs Hall algebras Quiver with involutions

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Engineering strontium aluminate sacrificial layers for fabricating monocrystalline complex oxide freestanding membranes

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The Innovation 2024年第4期5卷 23-24页

作者： Di lu school of Microelectronics University of Science and Technology of ChinaHefei 230026China

There was a long history of releasing various monocrystalline semiconductor structures from their hosting substrates to form“freestanding”structures,in order to change the substrates and for other special *** release was achieved by breaking the bonds between the film and the substrate,through methods such as forming interfacial gas bubbles(“smart-cut”technology for fabricating semiconductor-on-insulator wafers)or chemical etching(selectively etching epitaxial AlAs underlayer for fabricating GaAs-on-silicon photonic devices).The exfoliation of layered van der Waals materials in recent decades also produced another class of freestanding monocrystalline materials—twodimensional(2D)*** addition to changeable substrates,being freestanding also allowed unique methods to manipulate the 2D materials;for example,transferring them on flexible substrates and directly stretching them controls the strain in their lattice,as well as their strain-dependent physical properties.

关键词： free stretching fabricating

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Mast cell activation syndrome:An up-to-date review of literature

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World Journal of Clinical Pediatrics 2024年第2期13卷 104-113页

作者： ÖnerÖzdemir Gökçe Kasımoğlu Ayşegül Bak Hüseyin sütlüoğlu.süreyya savaşan Department of Pediatric Allergy and Immunology Sakarya UniversitySakaryaAdapazarı54100Türkiye Department of Pediatrics Sakarya UniversitySakaryaAdapazarı54100Türkiye Department of Pediatrics Kocaeli City HospitalKocaeli 50123Türkiye Department of Pediatrics Children’s Hospital of MichiganHematology/OncologyCentral Michigan University College of MedicineMount PleasantMI 48859United States Barbara Ann Karmanos Cancer Institute Wayne State UniversityDetroitMI 12345United States

Mast cells are a subtype of white blood cells and are involved in the immune *** cells contain many chemical substances called mediators,which are involved in the allergic *** fact that mast cells play a role in many events that require urgent intervention,especially anaphylaxis,has led to a more detailed study of these *** diseases also caused by dysfunctions of mast cells have been examined in many *** instance,mast cell activation syndrome is known as an augmented number of cells due to decreased cell death,resulting in clinical symptoms affecting many *** main common symptoms include flushing,hypotension,urticaria,angioedema,headache,vomiting and *** the underlying mechanism is not yet clearly known,we aim to review the literature in a broad perspective and bring together the existing knowledge in the light of the literature due to the diversity of its involvement in the body and the fact that it is a little known syndrome.

关键词： Mast cell Mast cell activation syndrome Tryptase Histamine

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Convolution Neural Network-based Load Model Parameter selection Considering short-term Voltage stability

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CsEE Journal of Power and Energy systems 2024年第3期10卷 1064-1074页

作者： Ying Wang Chao lu Xinran Zhang school of Technology Beijing Forestry UniversityBeijing 100083China state Key Laboratory of Control and simulation of Power system and Generation Equipment Tsinghua UniversityBeijing 100084China school of Automation science and Electrical Engineering Beihang UniversityBeijing 100083China IEEE

The recently proposed ambient signal-based load modeling approach offers an important and effective idea to study the time-varying and distributed characteristics of power ***,it also brings new *** the load model parameters of power loads can be obtained in real-time for each load bus,the numerous identified parameters make parameter application *** order to obtain the parameters suitable for off-line applications,load model parameter selection(LMPs)is first introduced in this ***,the convolution neural network(CNN)is adopted to achieve the selection purpose from the perspective of short-term voltage *** begin with,the field phasor measurement unit(PMU)data from China southern Power Grid are obtained for load model parameter identification,and the identification results of different substations during different times indicate the necessity of ***,the simulation case of Guangdong Power Grid shows the process of LMPs,and the results from the CNNbased LMPs confirm its effectiveness.

关键词： Ambient signal CNN field PMU data load model parameter selection short-term voltage stability

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