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Transfer Learning Algorithm Design for Feature Transfer Problem in Motor Imagery Brain-computer Interface

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China Communications 2022年第2期19卷 39-46页

作者： Yu Zhang Huaqing li Heng Dong zheng dai Xing chen Zhuoming li School of Computer Science and Technology Harbin Institute of TechnologyHarbin 150001 China School of Electronics and Information Engineering Harbin Institute of TechnologyHarbin 150001 China School of Electrical Computer and Energy EngineeringArizona State UniversityTempeArizona85281 USA

The non-stationary of the motor imagery electroencephalography(MI-EEG)signal is one of the main limitations for the development of motor imagery brain-computer interfaces(MI-BCI).The nonstationary of the MI-EEG signal and the changes of the experimental environment make the feature distribution of the testing set and training set deviates,which reduces the classification accuracy of *** this paper,we propose a Kullback–leibler divergence(KL)-based transfer learning algorithm to solve the problem of feature transfer,the proposed algorithm uses KL to measure the similarity between the training set and the testing set,adds support vector machine(SVM)classification probability to classify and weight the covariance,and discards the poorly performing *** results show that the proposed algorithm can significantly improve the classification accuracy of the testing set compared with the traditional algorithms,especially for subjects with medium classification ***,the algorithm based on transfer learning has the potential to improve the consistency of feature distribution that the traditional algorithms do not have,which is significant for the application of MI-BCI.

关键词： brain-computer interface motor imagery feature transfer transfer learning domain adaptation

Novel Ag-bridged dual Z-scheme g-C_(3)N_(4)/BiOI/AgI plasmonic heterojunction: Exceptional photocatalytic activity towards tetracycline and the mechanism insight

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Journal of Environmental Sciences 2023年第9期131卷 123-140页

作者： wenxia Wang Zhen li Kailin Wu Guodong dai Qingping chen lihua zhou Junxia zheng liang Ma Guiying li Wanjun Wang Taicheng An School of Biomedical and Pharmaceutical Sciences Guangdong University of TechnologyGuangzhou 510006China Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and HealthInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Guangzhou Key lab of Clean Transport Energy and Chemistry Guangdong University of TechnologyGuangzhou 510006China Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control Guangdong Technology Research Center for Photocatalytic Technology Integration and Equipment EngineeringSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China

Rational design and synthesis of highly efficient and robust photocatalysts with positive exciton splitting and interfacial charge transfer for environmental applications is ***,aiming at overcoming the common shortcomings of traditional photocatalysts such as weak photoresponsivity,rapid combination of photo-generated carriers and unstable structure,a novel Ag-bridged dual Z-scheme g-C_(3)N_(4)/BiOI/AgI plasmonic heterojunction was successfully synthesized using a facile *** showed that Ag-AgI nanoparticles and three-dimensional(3D)BiOI microspheres were decorated highly uniformly on the 3D porous g-C_(3)N_(4) nanosheet,resulting in a higher specific surface area and abundant active *** optimized 3D porous dual Z-scheme g-C_(3)N_(4)/BiOI/Ag-AgI manifested exceptional photocatalytic degradation efficiency of tetracycline(TC)in water with approximately 91.8%degradation efficiency within 165 min,outperforming majority of the reported g-C_(3)N_(4)-based ***,g-C_(3)N_(4)/BiOI/Ag-AgI exhibited good stability in terms of activity and ***-depth radical scavenging and electron paramagnetic resonance(EPR)analyses confirmed the relative contributions of various *** analysis indicated that the improved photocatalytic performance and stability were ascribed to the highly ordered 3D porous framework,fast electron transfer of dual Z-scheme heterojunction,desirable photocatalytic performance of BiOI/AgI and synergistic effect of Ag ***,the 3D porous Z-scheme g-C_(3)N_(4)/BiOI/Ag-AgI heterojunction had a good prospect for applications in water *** current work provides new insight and useful guidance for designing novel structural photocatalysts for environment-related applications.

关键词： Three-dimensional Porous heterostructure Graphitic carbon nitride(g-C_(3)N_(4)) Dual Z-scheme heterojunction Tetracycline(TC)degradation Mechanism insight

原位蒸汽辅助法用于一步制备多级孔Cu-BTC

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化工学报 2024年第9期75卷 3329-3337页

作者：代艳辉熊启钊房强杨东晓王毅陈杨李晋平李立博太原理工大学化学与化工学院山西太原030024 气体能源高效清洁利用山西省重点实验室山西太原030024

金属有机骨架材料(MOF)因其比表面积大、孔隙率高、结构高度可调等优势在气体吸附分离、催化、传感及生物医学等领域展现出巨大的应用潜力。但大多数MOF的孔结构在微孔范围,狭窄的孔隙环境限制了其应用过程中的传质扩散以及活性位点释放... 详细信息

金属有机骨架材料(MOF)因其比表面积大、孔隙率高、结构高度可调等优势在气体吸附分离、催化、传感及生物医学等领域展现出巨大的应用潜力。但大多数MOF的孔结构在微孔范围,狭窄的孔隙环境限制了其应用过程中的传质扩散以及活性位点释放,在微孔MOF结构的基础上进行多级孔的构建则可以解决这一问题。为实现经典Cu-BTC结构上的多级孔构筑,基于原位蒸汽辅助合成加刻蚀过程开发了一步制备多级孔Cu-BTC的新方法。通过绿色刻蚀剂乙酸用量、蒸汽辅助时间的调节,获得了孔径范围可调的多级孔Cu-BTC。由于多级孔结构对传质过程和活性位点的提升作用,该材料在CO_(2)电还原实验中展现出优秀的转化效率,最高乙烯的选择性可提升157%。通过蒸汽辅助耦合材料制备和刻蚀过程使得多级孔MOF的一步制备成为了可能,其具有的减少反应物用量和反应步骤的特点将进一步推动多级孔MOF在实际应用中的发展。

关键词：金属有机骨架多级孔原位蒸汽辅助一步制备绿色刻蚀

罗氏内异方调控缺氧干预子宫内膜异位症SF-1的机制研究

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中国中药杂志 2024年第18期49卷 4967-4976页

作者：吴李征陈晓鑫孙博文裴芳利蓝丹彤邝梓君张诗媛曾诚广州中医药大学广东广州510006 广州中医药大学第一附属医院广东广州510405 佛山市第一人民医院广东佛山528000

观察罗氏内异方对子宫内膜异位症(EMs)中缺氧诱导因子-1α(HIF-1α)和类固醇生成因子1(SF-1)的影响,探索罗氏内异方对EMs的治疗机制。免疫组化及qPCR法检测临床EMs组织中HIF-1α和SF-1的表达。提取鉴定人原代子宫内膜间质细胞(ESCs),免... 详细信息

观察罗氏内异方对子宫内膜异位症(EMs)中缺氧诱导因子-1α(HIF-1α)和类固醇生成因子1(SF-1)的影响,探索罗氏内异方对EMs的治疗机制。免疫组化及qPCR法检测临床EMs组织中HIF-1α和SF-1的表达。提取鉴定人原代子宫内膜间质细胞(ESCs),免疫荧光及qPCR法检测HIF-1α和SF-1的表达。用氯化钴(CoCl_(2))模拟体外缺氧环境,构建HIF-1α敲低慢病毒,qPCR或蛋白免疫印迹检测HIF-1α或SF-1的表达。观察罗氏内异方含药血清对缺氧环境下在位ESCs增殖、迁移、雌激素(E_(2))、HIF-1α和SF-1的影响。采用自体子宫内膜移植法联合多因素干预法建立气滞血瘀证EMs大鼠模型,观察罗氏内异方对大鼠异位子宫内膜组织中HIF-1α和SF-1的影响。结果提示,与正常子宫内膜组织及间质细胞相比,异位内膜组织及间质细胞中HIF-1α和SF-1的蛋白和mRNA水平均升高。与对照组相比,50μmol·L^(-1)CoCl_(2)处理在位ESCs 24 h可促进细胞增殖,显著增加HIF-1αmRNA和SF-1蛋白表达,而敲低HIF-1α可显著减少SF-1和E_(2)表达。与模型组相比,罗氏内异方含药血清组在位ESCs的增殖及迁移能力下降,E_(2)、HIF-1α和SF-1表达下降。同样,EMs大鼠经罗氏内异方治疗后,异位内膜组织病理损伤减轻,HIF-1α、SF-1的表达水平也显著降低。综上,罗氏内异方对EMs的治疗作用可能与改善缺氧环境,抑制HIF-1α/SF-1轴有关。

关键词：子宫内膜异位症罗氏内异方 HIF-1α SF-1 缺氧

超重肥胖与甲状腺嗜酸性细胞肿瘤恶性风险的关联

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中华医学杂志 2024年第30期104卷 2805-2809页

作者：单蕊李欣梅放肖伍才宋世兵陈敬原春辉张帆刘峥北京大学公共卫生学院北京100191 北京大学第三医院普通外科北京100191 北京大学医学部基础医学院北京大学第三医院病理科北京100191 北京大学第三医院超声医学科北京100191

目的探讨超重肥胖与甲状腺嗜酸性细胞肿瘤恶性风险的关联。方法回顾性收集2016年9月至2023年9月北京大学第三医院甲状腺嗜酸性细胞肿瘤患者的临床资料,根据术后病理诊断分为甲状腺嗜酸性细胞腺瘤组和嗜酸性细胞癌组。采用多因素logisti... 详细信息

目的探讨超重肥胖与甲状腺嗜酸性细胞肿瘤恶性风险的关联。方法回顾性收集2016年9月至2023年9月北京大学第三医院甲状腺嗜酸性细胞肿瘤患者的临床资料,根据术后病理诊断分为甲状腺嗜酸性细胞腺瘤组和嗜酸性细胞癌组。采用多因素logistic回归分析超重肥胖与甲状腺嗜酸性细胞肿瘤恶性风险的关联。结果共纳入102例患者,男13例,女89例,年龄(48.7±13.1)岁,甲状腺嗜酸性细胞癌22例,甲状腺嗜酸性细胞腺瘤80例。单因素分析结果显示,甲状腺嗜酸性细胞癌组的超重肥胖率高于嗜酸性细胞腺瘤组[73%(16/22)比46%(37/80),P=0.050]。多因素logistic回归分析结果显示,与非超重肥胖患者相比,超重肥胖患者具有更高的甲状腺嗜酸性细胞肿瘤恶性风险(OR=3.170,95%CI:1.126~9.955,P=0.035)。剔除多发肿瘤个体后进行的敏感性分析与主要研究结果方向一致(OR=2.878,95%CI:0.922~10.228,P=0.080)。结论在甲状腺嗜酸性细胞肿瘤患者中,超重肥胖可能与更高的肿瘤恶性风险有关。

关键词：甲状腺肿瘤超重肥胖恶性

Superconducting and structural properties of the phosphorus-rich Nb_(2)P_(5) superconductor under high pressure

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钨科技(英文) 2023年第3期5卷 364-369页

作者： lei-Ming chen fang-Huang Wei Yan-hong chen Hang-Qi liu Yang Xu Bo-Yu chen Can-li dai Yu-Bo Zhang Zhen-Hai Yu School of Materials Science and Engineering Henan Key Laboratory of Aeronautic Materials and Application TechnologyZhengzhou University of AeronauticsZhengzhou 450046China Henan Key Laboratory of Aeronautical Material and Application Technology Zhengzhou University of AeronauticsZhengzhou 450046China Yongcheng City Vocational Education Center Shangqiu 476600China Kaixue Cold Chain Logistics Co. LtdZhengzhou 451450China Minjiang Collaborative Center for Theoretical Physics College of Physics and Electronic Information EngineeringMinjiang UniversityFuzhou 350108China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

Nb_(2)P_(5) is a recently discovered Bardeen,Cooper,Schrieffer theory s-wave superconductor hosting nontrivial topological nodal-line structure,which could serve as an excellent platform for studying the interplay between the superconductivity and nontrivial topological *** report herein the superconducting and structural properties of Nb2P5studied by measuring the electrical resistivity and structure under high pressure up to ~28 GPa and performing first principles *** superconducting transition temperature TCdecreases with applied pressure,and reaches a minimum of 1.9 K at ~20.0 GPa,followed by a continuous enhancement up to 50.0 GPa without ***,at pressures above ~8.2 GPa,it is likely that a second superconducting transition appears and coexists with the initial one even up to~28 *** calculations rule out the correlation between the second superconducting-like transition and ***,the Nb2P5showed remarkable axial anisotropic compressibility,in which the b-axis is more compressible than the a-and *** variation of TCis discussed via considering the evolution of density of states around the Fermi level and the phonon spectrum.

关键词： Phosphorus-rich superconductor Superconducting transition temperature High-pressure measurement First principles calculations

钼酸铁比色传感体系的构建及其对半胱氨酸分析检测

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精细与专用化学品 2024年第5期32卷 55-60页

作者：陈丽于洪媚李美琦郑学芳廉琪河北科技师范学院河北秦皇岛066600

采用水热法制备Fe_(2)MoO_(4)纳米材料,通过X射线衍射仪(XRD)、傅里叶红外光谱仪(FT-IR)、比表面积测试仪(BET)以及扫描电子显微镜(SEM)对合成的Fe_(2)MoO_(4)纳米材料进行结构表征。探究Fe_(2)MoO_(4)纳米材料催化氧化3,3′,5,5′-四... 详细信息

采用水热法制备Fe_(2)MoO_(4)纳米材料,通过X射线衍射仪(XRD)、傅里叶红外光谱仪(FT-IR)、比表面积测试仪(BET)以及扫描电子显微镜(SEM)对合成的Fe_(2)MoO_(4)纳米材料进行结构表征。探究Fe_(2)MoO_(4)纳米材料催化氧化3,3′,5,5′-四甲基联苯胺(TMB)的最佳反应条件,构建Fe_(2)MoO_(4)-TMB-H_(2)O_(2) 比色检测平台。结果表明,Fe_(2)MoO_(4)纳米材料催化氧化TMB的最佳反应条件为:反应温度为40℃、pH值为4.0、反应时间为25min、H_(2)O_(2) 浓度为0.02mmol/L、TMB浓度为0.08mmol/L、Fe_(2)MoO_(4)纳米材料浓度为80μg/mL。在此最佳反应条件下,检测L-半胱氨酸(L-Cys),并在0~30μmol/L范围内进行线性拟合,得出良好的线性关系,最低检测限为0.4261μmol/L。

关键词：水热法纳米酶比色检测

Does the variance of incubation temperatures always constitute a significant selective force for origin of reptilian viviparity？

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Current Zoology 2012年第6期58卷 812-819页

作者： hong li zheng WANG Ce chen Xiang JI Jiangsu Key Laboratory for Biodiversity and Biotechnology College of Life SciencesNanjing Normal UniversityNanjing 210046JiangsuChina College of Forest Resources and Environment Nanjing Forestry UniversityNanjing 210037JiangsuChina

To test the hypothesis that the variance of incubation temperature may have constituted a significant selective force for reptilian viviparity, we incubated eggs of the slender forest skink Scincella modesta in five thermally different natural nests and at two constant temperatures （18℃ and 21 ℃）. Our manipulation of incubation temperature had significant effects on incubation length and several hatchling traits （snout-vent length, tail length, fore-limb length, and sprint speed）, but not on hatching success and other hatchling traits examined （body mass, head size, and hind-limb length）. Incubation length was nonlinearly sensitive to temperature, but it was not correlated with the thermal variance when holding the thermal mean constant. The 18 ℃ treatment not only produced smaller sized hatchlings but also resulted in decreased sprint speed. Eggs in the nest with the greatest proportion of temperatures higher than 28 ℃ also produced smaller sized hatchlings. None of the hatchling traits examined was affected by the thermal variance. Thermal fluctuations did result in longer incubation times, but females would benefit little from maintaining stable body temperatures or selecting thermally stable nests in terms of the reduced incubation length. Our data show that the mean rather than the variance of temperatures has a key role in influencing incubation length and hatchling phenotypes, and thus do not support the hypothesis tested .

关键词： Viviparity Scincid lizard Developmental plasticity Phenotype Incubation length Thermal

High-gain signal-on PEDOT:PSS organic photoelectrochemical transistor biosensing modulated by a MXene/MOFs/NiO Schottky heterojunction

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Science China Chemistry 2023年第2期66卷 578-585页

作者： zheng li Yi-Tong Xu Jin Hu Ting Wang fang-Qing liu hong zhou Guang-Xu chen Peng lin Wei-Wei Zhao Jing-Juan Xu hong-Yuan chen State Key Laboratory of Analytical Chemistry for life Science School of Chemistry and Chemical EngineeringNanjing UniversityNanjing210023China Shenzhen Key Laboratory of Special Functional Materials&Guangdong Research Center for Interfacial Engineering of Functional Materials College of Materials Science and EngineeringShenzhen UniversityShenzhen518060China Shandong Key Laboratory of Biochemical Analysis College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao266042China School of Environment and Energy State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Atmospheric Environment and Pollution ControlSouth China University of TechnologyGuangzhou510006China

Herein we report a high-gain signal-on poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)(PEDOT:PSS)organic electrochemical transistor(OECT)biosensing using an accumulation-mode PEDOT:PSS OECT modulated by a light-fueled MXene/MOFs/Ni O Schottky *** such a system,the MXene/MOFs/Ni O Schottky heterojunction exhibited superior gating effect,as it not only enabled the fast-directional charge transfer but also guaranteed the maximal accessibility of the electrolyte to topped 2D MXene with large surface *** linkage with a bi-enzyme cascade system,the quinone derivatives produced by the cascade reaction of alkaline phosphatase(ALP)and tyrosinase(TYR)could serve as effective electron acceptors for the representative Ti_(3)C_(2)/PCN-224/Ni O heterojunction,underpinning an innovative method for sensitive detection of ALP activity with a low detection limit of 0.001 U L^(-1).Remarkably,the as-developed system demonstrated a remarkable current gain as high as near 10^(4),which to our knowledge is the highest one among existing OECT biosensory *** work represents a generic protocol to develop the novel signal-on PEDOT:PSS OECT platform towards biochemical detection and beyond.

关键词： signal-on PEDOT:PSS organic electrochemical transistor biosensing Schottky heterojunction