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Magnetic Fabric and Petrofabric of Amphibolites from the Namcha Barwa Complex, Eastern Himalaya

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Journal of Earth Science 2020年第1期31卷 115-125页

作者： wenjing li Haijun Xu Junfeng Zhang Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences、Wuhan 430074China School of Earth Sciences China University of GeosciencesWuhan 430074China

The magnetic fabric and petrofabric are often used as tectonic indicators of geological and geodynamic processes that a rock has experienced such as growth, deformation and metamorphism. This study presents the low field anisotropy of magnetic susceptibility(AMS) and the crystallographic preferred orientation(CPO) of constituent minerals in amphibolites from the Namcha Barwa Complex in the eastern Himalayan Syntaxis, Tibet. The bulk magnetic susceptibility varies significantly from 7.3×10^(-4) to 3.314×10^(-2) SI, with the Jelínek's anisotropy values(Pj) ranges from 1.094 to 1.487. The maximum susceptibility is approximately parallel to the lineation while the minimum susceptibility is subnormal to the foliation plane. Electron backscatter diffraction(EBSD) analyses show pronounced CPOs of amphibole in all samples, with a preferred alignment of the [001] axes along the lineation and the [100] axes spreading along a girdle normal to the lineation. Numerical simulations and comparison with laboratory measurements suggest that the magnetic anisotropy of amphibolite is largely controlled by the CPOs of amphibole. If present, the well oriented iron-titanium oxides such as ilmenite along rock foliation and lineation could increase the susceptibility and the anisotropy of a rock. Our results show a strong correlation between the magnetic anisotropy and the petrofabric of amphibolite, which could provide constraint for the interpretation of strong magnetic anomalies observed in the tectonic syntaxes of Tibet.

关键词： petrofabric anisotropy of magnetic susceptibility crystallographic preferred orientation amphibolite Tibet

Multitask Learning with Multiscale Residual Attention for Brain Tumor Segmentation and Classification

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Machine Intelligence Research 2023年第6期20卷 897-908页

作者： Gaoxiang li Xiao Hui wenjing li Yanlin Luo School of Artificial Intelligence Beijing Normal UniversityBeijing100875China

Automatic segmentation and classification of brain tumors are of great importance to clinical ***,they are challenging due to the varied and small morphology of the *** this paper,we propose a multitask multiscale residual attention network(MMRAN)to simultaneously solve the problem of accurately segmenting and classifying brain *** proposed MMRAN is based on U-Net,and a parallel branch is added at the end of the encoder as the classification ***,we propose a novel multiscale residual attention module(MRAM)that can aggregate contextual features and combine channel attention and spatial attention better and add it to the shared parameter layer of ***,we propose a method of dynamic weight training that can improve model performance while minimizing the need for multiple experiments to determine the optimal weights for each ***,prior knowledge of brain tumors is added to the postprocessing of segmented images to further improve the segmentation *** evaluated MMRAN on a brain tumor data set containing meningioma,glioma,and pituitary *** terms of segmentation performance,our method achieves Dice,Hausdorff distance(HD),mean intersection over union(MIoU),and mean pixel accuracy(MPA)values of 80.03%,6.649 mm,84.38%,and 89.41%,*** terms of classification performance,our method achieves accuracy,recall,precision,and F1-score of 89.87%,90.44%,88.56%,and 89.49%,*** with other networks,MMRAN performs better in segmentation and classification,which significantly aids medical professionals in brain tumor *** code and data set are available at https://***/linkenfaqiu/MMRAN.

关键词： Brain tumor segmentation and classification multitask learning multiscale residual attention module(MRAM) dynamic weight training prior knowledge

Preparation and water sorption properties of novel SiO_(2)-liBr microcapsules for water-retaining pavement

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Chinese Journal of Chemical Engineering 2021年第6期34卷 230-241页

作者： wenjing li Gilmore Wellio Tiejun Lu Changjun Zou Yongliang li School of Chemical Engineering University of BirminghamEdgbastonBirmingham B152TTUK College of Chemistry and Chemical Engineering Southwest Petroleum UniversityChengdu 610500China Chengdu Advanced Metal Materials Industry Technology Research Institute Co. LtdChengdu 610000China

Novel SiO_(2)-liBr microcapsules for water-retaining pavement were prepared and firstly characterized by scanning electron microscope(SEM),particle size analysis,and Fourier transform infrared spectroscopy(FT-IR).The water vapor sorption and desorption of the formulated microcapsules was then experimentally studied using dynamic vapor sorption(DVS),with the results fitted to three kinds of adsorption kinetics *** addition,the specific surface area(SSA)was also calculated based on BET theory;and the thermal performance was investigated by laser flash analysis(LFA).Experimental results show a change of 103%in mass of the microcapsule sample under 90%relative humidity(RH)at 30℃after water vapor *** fitting of results indicates that the adsorption process is mainly governed by the intra-particle diffusion mechanism,followed by the pseudo-first-order adsorption *** comparison with most conventional pavement materials,it is found that the SSA of the formulated microcapsules is much larger while the thermal conductivity is *** unique properties of the formulated SiO_(2)-liBr microcapsules have significant potential to take the edge off the urban heat island effect and reduce rutting when applied to water-retaining pavement materials.

关键词： Microcapsules Water vapor sorption Thermal performance Adsorption kinetics Water-retaining pavement

A Self-Organizing RBF Neural Network Based on Distance Concentration Immune Algorithm

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IEEE/CAA Journal of Automatica Sinica 2020年第1期7卷 276-291页

作者： Junfei Qiao Fei li Cuili Yang wenjing li Ke Gu Beijing University of Technology Beijing 100083China

Radial basis function neural network(RBFNN) is an effective algorithm in nonlinear system identification. How to properly adjust the structure and parameters of RBFNN is quite challenging. To solve this problem, a distance concentration immune algorithm(DCIA) is proposed to self-organize the structure and parameters of the RBFNN in this paper. First, the distance concentration algorithm, which increases the diversity of antibodies, is used to find the global optimal solution. Secondly,the information processing strength(IPS) algorithm is used to avoid the instability that is caused by the hidden layer with neurons split or deleted randomly. However, to improve the forecasting accuracy and reduce the computation time, a sample with the most frequent occurrence of maximum error is proposed to regulate the parameters of the new neuron. In addition, the convergence proof of a self-organizing RBF neural network based on distance concentration immune algorithm(DCIA-SORBFNN) is applied to guarantee the feasibility of algorithm. Finally, several nonlinear functions are used to validate the effectiveness of the algorithm. Experimental results show that the proposed DCIASORBFNN has achieved better nonlinear approximation ability than that of the art relevant competitors.

关键词： Distance concentration immune algorithm(DCIA) information processing strength(IPS) radial basis function neural network(RBFNN)

Riemann-Hilbert approach and multiple high-order pole solutions for the AB system

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Communications in Theoretical Physics 2024年第11期76卷 33-41页

作者： wenjing li Yi Zhang Xiaolin Yang Department of Mathematics Zhejiang Normal UniversityJinhua 321004China

This article's purpose is to investigate multiple high-order pole solutions for the AB system by the Riemann-Hilbert(RH)*** establish the RH problem through using spectral analysis to the Lax *** the RH problem can be resolved and the soliton solution's formula can be given by using the Laurent expansion ***,we get special soliton solutions,including dark solitons,W-type dark solitons and multiple high-pole *** addition,the W-type dark soliton solutions will occur when the spectral parameters are purely imaginary.

关键词： AB system Riemann-Hilbert approach multiple high-pole solutions

足部位置和座椅高度对脑瘫儿童坐-站转移下肢运动学和动力学参数的影响

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中国组织工程研究 2025年第21期29卷 4469-4476页

作者：李文静高晓李爱华倪燕孙威王疆娜山东体育学院山东省济南市250102 临沂市康复医院山东省临沂市276023 济南医院山东省济南市250013

背景:足位和座椅高度是影响“坐-站转移”的重要因素,但目前对“坐-站转移”动作的研究多侧重于健康人群和帕金森患者,痉挛型脑瘫儿童在不同座椅高度和足部位置下执行“坐-站转移”任务中的下肢运动学和动力学特征尚未可知。目的:探究... 详细信息

背景:足位和座椅高度是影响“坐-站转移”的重要因素,但目前对“坐-站转移”动作的研究多侧重于健康人群和帕金森患者,痉挛型脑瘫儿童在不同座椅高度和足部位置下执行“坐-站转移”任务中的下肢运动学和动力学特征尚未可知。目的:探究不同足部位置及座椅高度对脑瘫儿童执行“坐-站转移”任务过程中下肢运动学和动力学参数的影响。方法:选择7名痉挛型脑瘫儿童作为研究对象,对其进行6个任务即3种座椅高度(高、中、低凳)×2种足位(前、后足位)的“坐-站转移”动作测试,采集脑瘫儿童在不同足位和座椅高度下“坐-站转移”时的运动学和动力学数据。结果与结论:(1)时间特征结果表明,相较于低凳条件,脑瘫儿童在高凳条件下进行“坐-站转移”任务所需总时间显著减少(P=0.046);(2)动力学结果表明,抬离瞬间,双足后位条件下的膝关节屈曲力矩显著大于双足前位条件(P=0.049);相较于中凳条件,在高凳条件下膝关节屈曲力矩显著减小(P <0.001);(3)结果提示抬高座椅高度和改变足位条件均对痉挛型脑瘫儿童的“坐-站转移”表现有影响,在高凳双足后位条件下儿童使用较小的运动补偿就可以完成坐站动作;同时高座椅可作为痉挛型脑瘫儿童增强“坐-站转移”表现的辅助工具,高凳双足后位条件更有助于脑瘫儿童“坐-站转移”动作的完成。

关键词：痉挛型脑瘫足位座椅高度坐-站转移姿势控制

Development and analysis of a novel AF11-2 aptamer capable of enhancing the fluorescence of aflatoxin B1

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Chinese Chemical Letters 2022年第8期33卷 4096-4100页

作者： wenjing li Yian Pei Jine Wang School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026China CAS Key Laboratory of Nano-Bio Interface Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China

Aflatoxin B1(AFB1)is one of the most common mycotoxins that threatens human *** singlestranded oligonucleotides with high affinity and specificity,aptamers have incomparable effect on the targeted detection of ***,after 11 rounds of selection and analysis using a modified affinity chromatography-based SELEX strategy,the truncated 37 nt aptamer AF11-2 was successfully *** aptamer shows good detection performance for AFB1,and can sensitively detect AFB1 in the range of 100-1000 nmol/L,with a detection limit of 42 nmol/*** the detection of pretreated edible peanut oil samples,AF11-2 aptamer also showed a high recovery rate and good stability for AFB1,and achieved satisfactory *** addition,AF11-2 aptamer can significantly enhance the fluorescence ability of AFB1,which is not available in traditional Afla17-2-3 *** molecular docking analysis,it was found that AF11-2 and Afla17-2-3 had different nucleotide binding sites for ***17-2-3 binds to the carbonyl O of AFB1,while AF11-2 binds to the pyrrolic O of AFB1,which may be the main reason that AF11-2 can enhance the fluorescence of AFB1.

关键词： Aptamer AF11-2 Targeted detection Aflatoxin B1 Enhanced fluorescence Docking analysis

The genetic diversity, individual relatedness and possible mating system of an isolated population of the Cyprinid species Megalobrama pellgrini in upper reaches of the Changjiang (Yangtze) River, China

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Journal of Oceanology and limnology 2019年第3期37卷 1042-1050页

作者： WANG Huanshan WANG Teng li wenjing liU Huanzhang The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences Institute of HydrobiologyChinese Academy of SciencesWuhan 430072China University of Chinese Academy of Sciences Beijing 100049China

Megalobrama pellegrini is a cyprinid fish endemic to upper reaches of the Changjiang(Yangtze)River,China,which is also an important economic species in the local *** recent years,resources of this species have decreased sharply and its conservation has drawn great *** the present study,we collected 120 individuals from the Longxi River,a tributary isolated from the main channel of the Changjiang River,where *** is still relatively *** two different molecular markers,mitochondrial cytochrome b(cyt b)gene,and nuclear microsatellite(simple sequence repeat,SSR),we analyzed the genetic diversity of this isolated *** results show that sequence genetic diversity was low(Hd:0.290 and P i:0.000 77 for cyt b gene),while the SSR genetic diversity was high(Ho:0.824 4±0.147 2,He:0.823 5±0.145 1).Analysis indicated that this population had experienced a bottleneck,with inbreeding and small effective population size(around 50).Based on SSR data,relatedness analyzing revealed that the 120 samples were grouped into 10 completely independent *** was inferred that the mating system of *** was *** suggested that the low genetic diversity could be induced by the overfishing and inbreeding ***,we suggested that the urgent conservation measures should be taken to control the overfi shing and give better conditions for the fish to grow and spawn,then to restore population size.

关键词： isolated population genetic diversity individual relatedness mating system conservation

Research on Petri Net System Parallel Subnet Partitioning Completeness Theory and Algorithm

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Wuhan University Journal of Natural Sciences 2019年第3期24卷 205-217页

作者： li wenjing li Songzhao LU Jianbo School of Logistics Management and Engineering Nanning Normal University Guangxi Higher-Education Key Laboratory of Scientific Computing and Intelligent Information Processing Nanning Normal University College of Computer and Information Engineering Nanning Normal University

In order to solve the parallel algorithm of Petri net system with concurrent function, so as to achieve the parallel control and simulation operation of this system, this paper proposes the function partition completeness theory and algorithms of Petri net parallelization, thereby providing the theoretical support for the realization of Petri parallel algorithms. Firstly, according to the concurrent characteristics of Petri net model, we analyze the parallelism of Petri net system; then, by giving the solving process of place invariants and the function partitioning of Petri net, we propose the function partitioning conditions and determination theorem of Petri net parallelization, and conduct its theoretical proof and practical verification. On this basis, we conduct the theoretical study and analysis on the situation that Petri net system has several kinds of parallel function partitioning, propose the completeness theorem of parallelism function partitioning in Petri net system, and verify it. Finally, we give the algorithms, application examples and simulation experiment results of parallel function partitioning of Petri net systems based on place invariant. The theoretical proof and experimental results show that the function partitioning conditions and completeness theory of Petri net parallelization based on place invariant are correct, and the parallel algorithms under such theoretical basis are also correct and effective.

关键词： Petri net parallelization partitioning conditions completeness partitioning algorithm