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Research on EEG emotion recognition based on CNN+BiLSTM+self-attention model

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Optoelectronics Letters 2023年第8期19卷 506-512页

作者： LI Xueqing LI Penghai FANG Zhendong CHENG longlong WANG Zhiyong WANG Weijie School of Integrated Circuit Science and Engineering Tianjin University of TechnologyTianjin 300384China China France BOHAI Geoservices Co. Ltd.Tianjin 300457China China Electronics Cloud Brain(Tianjin)Technology Co. Ltd.TianjinChina Institute of Motion Analysis and Research University of DundeeScotland DD14HNUK

To address the problems of insufficient dimensionality of electroencephalogram(EEG) feature extraction,the tendency to ignore the importance of different sequential data segments,and the poor generalization ability of the model in EEG based emotion recognition,the model of convolutional neural network and bi-directional long short-term memory and self-attention(CNN+Bi LSTM+self-attention) is *** model uses convolutional neural network(CNN) to extract more distinctive features from both spatial and temporal *** bi-directional long short-term memory(Bi LSTM) is used to further preserve the long-term dependencies between the temporal phases of sequential *** self-attention mechanism can change the weights of different channels to extract and highlight important information and address the often-ignored importance of different channels and samples when extracting EEG *** subject-dependent experiment and subject-independent experiment are performed on the database for emotion analysis using physiological signals(DEAP) and collected datasets to verify the recognition *** experimental results show that the model proposed in this paper has excellent recognition performance and generalization ability.

关键词： EEG weights LSTM

Two-dimensional metal-organic-framework as a unique theranostic nano-platform for nuclear imaging and chemo-photodynamic cancer therapy

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Nano Research 2019年第6期12卷 1307-1312页

作者： Wenjun Zhu Yu Yang Qiutong Jin Yu Chao longlong Tian Jingjing Liu Ziliang Dong Zhuang Liu Institute of Functional Nano & Soft Materials(FUNSOM) Collaborative Innovation Center of Suzhou Nano Science and TechnologyJiangsu Key Laboratory for Carbon-based Functional Materials and DevicesSoochow UniversitySuzhou 215123China State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of MacaoAvenida da UniversidadTaipaMacao 31608China

Nanoscale metal organic frameworks (NMOFs) with porous structure and inherent biodegradability are attractive nanomedicine *** addition to conventional particulate NMOFs,two-dimensional (2D) NMOFs are emerging as a unique type of NMOFs which however have been relatively less explored for nanomedicine ***,2D NMOFs composed of Zn2+ and tetrakis(4-carboxyphenyl) porphyrin (TCPP) are fabricated and functionalized with polyethylene glycol (PEG).Compared to their particulate counterpart,such 2D NMOFs show greatly increased drug loading capacity and enhanced light-triggered singlet oxygen production,promising for chemotherapy and photodynamic therapy (PDT),*** the porphyrin structure of TCPP,our 2D NMOFs could be labeled with a diagnostic radioisotope,99mTc,for single photon emission computer tomography (SPECT) imaging,which reveals efficient tumor homing of those 2D NMOFs upon intravenous *** offering a remarkable synergistic in vivo antitumor effect for the combined chemo-PDT,such 2D NMOFs show efficient biodegradation and rapid renal *** work presents the great promise of 2D NMOFs for nanomedicine applications.

关键词： nanoscale metal-organic-framework two-dimensional nanosheets drug delivery photodynamic therapy combination therapy

Biodegradation of occluded hydrocarbons and kerogen macromolecules of the Permian Lucaogou shales,Junggar Basin,NW China

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Energy Geoscience 2023年第1期4卷 179-184页

作者： Yan'e Chen longlong Li Zhirong Zhang Paul F.Greenwood Yumin Liu Wuxi Branch of SINOPEC Petroleum Exploration and Development Research Institute WuxiJiangsu214126China SINOPEC Key Laboratory of Petroleum Accumulation Mechanisms WuxiJiangsu214126China Hubei Key Laboratory of Petroleum Geochemistry and Environment Yangtze UniversityWuhanHubei430100China School of Earth Sciences University of Western AustraliaCrawleyWA6009Australia Western Australia Organic and Isotope Geochemistry Centre School of Earth and Planetary SciencesCurtin UniversityGPO Box U1987PerthWA6845Australia Hubei Key Laboratory of Petroleum Geochemistry and Environment(Yangtze University) Yangtze UniversityWuhan430100China

Three kerogen samples(JJZG-1,JJZG-2 and JJZG-3)isolated from the Permian Lucaogou shales of varying biodegradation levels(BLs≈0,3 and 7,respectively)were subjected to sequential stepwise pyrolysis combined with on-line detection of gas chromatography-mass spectrometry(GC-MS).Occluded fractions(bitumenⅡ)released at low-temperature steps(≥410℃)show consistent biodegradative signatures with that reported for solvent-extracted fractions(bitumenⅠ)of the original shales,e.g.,broad range of abundant n-alkanes,isoprenoids and regular hopanes for the non-biodegraded JJZG-1;trace n-alkanes and abundant hopanes for the moderately biodegraded JJZG-2;and no n-alkanes but still prominent hopanes including the microbially produced 25-nohopanes for the severely biodegraded *** consistency between bitumenⅡand bitumenⅠfractions indicates the biodegradability of the kerogenoccluded bitumenⅡwith limited protection from host kerogen.A minor level of protection was suggested by the trace distribution of n-alkanes in the bitumenⅡof JJZG-2,whereas the bitumenⅠhad no *** kerogen itself was more resistant to biodegradation as reflected by the persistence of high abundances of both n-alkanes and hopanes in the high temperature(≥460℃)products of all three kerogen ***,the relative abundances of these product groups did show some evidence of biodegradation alteration,e.g.,ratios of n-C_(15)alkene/C_(27)hop-17(21)-ene at 510℃pyrolysis decreased by order of magnitude from the non-biodegraded(JJZG-1=27.4)to highly biodegraded(0.3 for JJZG-3)*** reduced biodegradation impact on the kerogen fraction(*** fractions)was also evident by the absence of 25-norhopanes in the high-temperature analysis of the JJZG-3 kerogen.

关键词： Biodegradation Stepwise pyrolysis Occluded hydrocarbon BitumenⅡ Kerogen Source rock Permian Lucaogou shale Junggar Basin

A review on the chemo-catalytic conversion of cellulose to bio-ethanol

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Green Chemical Engineering 2024年第3期5卷 276-289页

作者： Xiuzheng Zhuang Haiyong Wang Shugen Jiang Xiaohong Hu Tong Su Xinghua Zhang longlong Ma Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing210096China Key Laboratory of Renewable Energy Guangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhou510640China Wuzhou Refrigeration Group Co.Ltd. Nanjing211100China

While the industry has produced sugar-derived ethanol from the conventional method of fermentation for hundreds of years,other effective routes involving the direct transformation of carbohydrates still remain extremely *** recently,an innovative chemo-catalytic method driven by the aqueous-phase catalysis was created for the synthesis of cellulosic ethanol,making a great breakthrough in the common ways as it can theoretically utilize all of the carbon atoms in sugars with faster kinetics;up to now,results from the relevant studies have been accumulated to a certain extent,but the periodic conclusions in this field are unfortunately *** this reason,this work tries to offer an overview of the cellulosic ethanol produced by chemo-catalytic routes,highlighting the present knowledge in relation to the technical efficiency,catalytic mechanisms as well as practical *** first,the advanced progress on the increasing efficiency from a varied type of catalytic systems are extensively discussed,which involves the specific functions of hybrid components from different strategies;meanwhile,the general influences of processing conditions,such as the hydrothermal severity and aqueous environments,are also ***,possible mechanisms behind the chemo-catalytic processes are widely elaborated by analyzing a number of experimental cases associated with the reaction network and its kinetic *** that,the actual effects of this technique on the real biomass are collected to identify the positive/negative interactions between multiple components,together with the potential solutions on the semi-continuous processes of pilot scale *** techno-economic analysis(TEA)is also calculated and compared with other similar methods,such as fermentation and ***,several proposals aimed at upgrading the whole chain of chemo-catalytic processes are clearly provided,which may function as a guideline for future studies on the pr

关键词： Cellulosic ethanol Chemo-catalytic method Influencing factors Catalytic mechanism Techno-economic analysis

Challenges in applying REE-based thermobarometers: Insights from mafic-ultramafic granulites in Indian southern granulite terrain

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Science China Earth Sciences 2024年第11期67卷 3448-3464页

作者： Xiaofei XU longlong GOU Chengli ZHANG Junsheng LU Yan ZHAO Wenhao AO Yuhua HU Feng ZHOU Faculty of Land Resources Engineering Kunming University of Science and TechnologyKunming 650093China State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069China

High-temperature diffusion of major elements may obscure the records of early and peak metamorphic stages in granulites,while trace elements are more likely to preserve these records due to their lower diffusion ***,using calibrated REE-based thermobarometers has proved essential for reconstructing these key stages,drawing considerable attention and application from ***,the precision of these thermobarometers depends on including both major and trace elements from coexisting minerals to define the correlation coefficients(A,B,and D) among mineral pairs,indicating that the elemental composition of these pairs can affect the *** study examines the mafic-ultramafic granulites in the southern granulite terrain,India,employing integrated methods such as petrography,mineral chemistry,phase equilibrium modeling,and REE-based *** aim to determine their metamorphic conditions and evolutionary history and to identify potential challenges in using REE-based *** garnet,clinopyroxene,and orthopyroxene in the mafic-ultramafic granulite samples display homogeneous compositional profiles,with pronounced Fe-Mg diffusion zones at the interfaces between garnet and ***,the profiles of trace elements within garnet and clinopyroxene are better *** into Fe-Mg exchange and randomly selected mineral pairs significantly influence the accuracy of REE-based ***-Mg exchange can increase in coefficient A,while decreasing coefficient B for light rare earth elements(LREEs) and increasing it for heavy rare earth elements(HREEs),ultimately resulting in overestimations when calculating REE-based *** example,selecting major compositions with an Ex(=(X_(Mg)^(C)-X_(Mg)^(0))/X_(Mg)^(0)×100%;where X_(Mg)^(C) is the value after Fe-Mg exchange,X_(Mg)^(0) is the value before Fe-Mg exchange;X_(Mg)=Mg/(Fe^(2+)+Mg)) value of ~10 for calculation using the REE-in-Grt-Cpx thermoba

关键词： Granulites REE-based thermobarometer Fe-Mg exchange Randomly selected mineral pairs

Isolation of a feline-derived feline panleukopenia virus with an A300P substitution in the VP2 protein and confrmation of its pathogenicity in dogs

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Animal Diseases 2024年第3期4卷 173-185页

作者： Jiakang Li Jiajia Peng yue Zeng Ying Wang Luying Li Yiran Cao longlong Cao QingXiu Chen Zijun Ye Dengyuan Zhou Shengbo Cao Qiuyan Li National Key Laboratory of Agricultural Microbiology Huazhong Agricultural UniversityWuhan 430070HubeiChina. Laboratory of Animal Virology College of Veterinary MedicineHuazhong Agricultural UniversityWuhanHubeiP.R.China. Wuhan Keqian Biology Co. LtdWuhanHubeiP.R.China. Department of Life Science Imperial College LondonLondonUK.

Feline panleukopenia virus(FPV)is a single-stranded DNA virus that can infect cats and cause feline panleukopenia,which is a highly contagious and fatal disease in *** sequence of FPV is highly variable,and mutations in the amino acids of its capsid protein play crucial roles in altering viral virulence,immunogenicity,host selection,and other *** this study,the epidemiology of FPV was studied using 746 gastrointestinal swab samples derived from cats that presented gastrointestinal symptoms specifcally,diarrhea or vomiting during the period spanning from 2018 to *** overall prevalence of FPV-positive patients among these samples was determined to be 45.4%.Capsid(virion)protein 2(VP2)gene of each FPV-positive sample was sequenced and amplifed,yielding 65 VP2 *** them,six VP2 gene sequences were detected in the majority of the samples test positive for FPV,and these positive samples originated from a diverse range of geographical *** isolates were named FPV-6,FPV-10,FPV-15,FPV-251,FPV-271 and ***,the substitution of Ala300Pro(A300P)in VP2 was detected for the frst time in feline-derived FPV(FPV-251).FPV-251 isolate,with this substitution in VP2 protein,exhibited stable proliferative capacity in Madin-Darby canine kidney(MDCK)cells and A72 ***-271 was selected as the FPV control isolate due to its single amino acid diference from VP2 protein of FPV-251 at position 300(FPV-271 has alanine,while FPV-251 has proline).After oral infection,both FPV-251 and FPV-271 isolates caused feline panleukopenia,which is characterized by clinical signs of ***,FPV-251 can infect dogs through the oral route and cause gastrointestinal(GI)symptoms with lesions in the intestine and mesenteric lymph nodes(MLNs)of infected *** is the frst report on the presence of an A300P substitution in VP2 protein of feline-derived ***,FPV isolate with a substitution of A300P at VP2 protein demonstrated

关键词： Feline panleukopenia virus FPV Dogs VP2 gene characteristic Host range

Review of the detasseling techniques for maize(Zea mays L.)hybrid seed production

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International Journal of Agricultural and Biological Engineering 2024年第3期17卷 1-11页

作者： Ruirui Zhang Jiaxuan Yang Liping Chen Chenchen Ding longlong Li Linhuan Zhang National Research Center of Intelligent Equipment for Agriculture Beijing Academy of Agriculture and Forestry SciencesBeijing 100097China National Center of International Research on Agricultural Aerial Application Technology Beijing 100097China Research Center of Intelligent Equipment Beijing Academy of Agriculture and Forestry SciencesBeijing 100097China

Maize(Zea mays L.)is a critical staple crop globally,integral to human consumption,food security,and agricultural product *** quality and purity of maize seeds,essential for hybrid seed production,are contingent upon effective *** study investigates the evolution of detasseling technologies and their application in Chinese maize hybrid seed production,with a comparative analysis against the United States.A comprehensive examination of the development and utilization of detasseling technology in Chinese maize hybrid seed production was undertaken,with a specific focus on key *** from the United States were included for comparative *** analysis encompassed various detasseling methods,including manual,semi-mechanized,and cytoplasmic male sterility,as well as more recent innovations such as detasseling machines,and the emerging field of intelligent detasseling driven by unmanned aerial vehicles(UAVs),computer vision,and mechanical *** detasseling methods were predominantly employed by *** the challenges of inflexible and occasionally overlooked,applying detasseling machines is efficient and *** present,China’s detasseling operations in hybrid maize seed production are mainly carried out by manual work,which is labor-intensive and *** order to address this issue,China is dedicated to developing intelligent detasseling *** study emphasizes the critical role of detasseling in hybrid maize seed *** United States has embraced mechanized *** application and development of manual and mechanized detasseling were applied later than those in the United States,but latest intelligent detasseling technologies first appeared in *** detasseling is expected to be the future direction,ensuring the quality and efficiency of hybrid maize seed production,with implications for global food security.

关键词： detasseling technique detasseling machine UAVs intelligent agriculture maize hybrid seed production

Direct Ethylene Purification from Cracking Gas via a Metal–Organic Framework Through Pore Geometry Fitting

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Engineering 2024年第10期41卷 84-92页

作者： Yang Chen Zhenduo Wu longlong Fan Rajamani Krishna Hongliang Huang Yi Wang Qizhao Xiong Jinping Li Libo Li College of Chemical Engineering and Technology Taiyuan University of TechnologyTaiyuan 030024China City University of Hong Kong(Dongguan) Dongguan 523000China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Van’t Hoff Institute for Molecular Sciences University of AmsterdamAmsterdam 1098 XHNetherlands State Key Laboratory of Separation Membranes and Membrane Processes Tiangong UniversityTianjin 300387China Center for Neutron Scattering City University of Hong Kong Shenzhen Research InstituteShenzhen 518057China

The direct one-step separation of polymer-grade C_(2)H_(4) from complex light hydrocarbon mixtures has high industrial significance but is very ***,an ethylene-adsorption-weakening strategy is applied for precise regulation of the pore geometry of four tailor-made metal–organic frameworks(MOFs)with pillar-layered structures,dubbed TYUT-10/11/12/*** on its pore geometry design and functional group regulation,TYUT-12 exhibits exceptional selective adsorption selectivity toward C_(3)H_(8),C_(3)H_(6),C_(2)H_(6),C_(2)H_(2),and CO_(2) over C_(2)H_(4);its C_(2)H_(6)/C_(2)H_(4) adsorption selectivity reaches 4.56,surpassing the record value of 4.4 by Fe_(2)(O_(2))(dobdc)(dobdc^(4-)=2,5-dioxido-1,4-benzenedicarboxylate).The weak p–p stacking binding affinity toward C_(2)H_(4) in TYUT-12 is clearly demonstrated through a combination of neutron powder diffraction measurements and theoretical *** experiments demonstrate that C_(2)H_(4) can be directly obtained from binary,ternary,quaternary,and six-component light hydrocarbon mixtures with over 99.95%purity.

关键词： Metal-organic frameworks Pore regulation Adsorptive separation One-step purification C_(2)H_(4)purification

Electron Magnetohydrodynamics Magnetic Reconnection Experiment on Keda Linear Magnetized Plasma Device

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Chinese Physics Letters 2019年第1期36卷 40-43页

作者： Feibin Fan Jinlin Xie Qiaofeng Zhang longlong Sang Weixing Ding CAS Key Laboratory of Geoscience Environment School of Earth and Space Sciences University of Science and Technology of China CAS Key Laboratory of Geoscience Environment School of Physics University of Science and Technology of China

We conduct an electron magnetohydrodynamics magnetic reconnection experiment with guide-field in our Keda linear magnetized plasma device, in which two pulsed currents with the same direction are conducted in parallel with the axial direction of the main chamber of the device using two long aluminum sticks. After approximately 5μs, an X-type magnetic field line topology is formed at the center of the chamber. With the formation of the X-type topology of magnetic field lines, we can also find the rapid increase of the current and ratio of the common flux to the private flux in this area. Additionally, a reduction in the plasma density and the plasma density concentration along one pair of separatrices can also be found.

关键词： Electron magnetohydrodynamics Magnetic Reconnection Experiment Keda Linear Magnetized Plasma Device