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Photodeposition fabrication of hierarchical layered Co-doped Ni oxyhydroxide(NixCo1−xOOH)catalysts with enhanced electrocatalytic performance for oxygen evolution reaction

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Nano Research 2020年第1期13卷 246-254页

作者： Liang-ai Huang Zhishun He jianfeng guo Shi-en Pei Haibo Shao Jianming Wang Department of Chemistry Zhejiang UniversityHangzhou310027China

Highly active,durable and inexpensive oxygen evolution reaction(OER)catalysts are crucial for achieving practical and high-efficiency water ***,hierarchical interconnected NixCo1−xOOH nanosheet arrays supported on TiO2/Ti substrate have been fabricated through a facile photodeposition *** with pristine NiOOH,the obtained NixCo1−xOOH nanosheet arrays possess larger exposed electrochemical active surface area,faster transfer and collection of electrons and stronger electronic interaction,showing a low overpotential of 350 mV at a current density of 10 mA·cm−2 and a small Tafel slope of 41 mV·dec−1 in basic solutions,with the OER performance superior to pristine NiOOH and most Ni-based ***,the NixCo1−xOOH electrode demonstrates excellent stability at the current density of 10 mA·cm−2 for 24 hours,which is attributed to the structural maintenance caused by the good adhesion of the catalyst and the *** study provides an alternative approach for the rational design of highly active and promising OER electrocatalysts.

关键词： nickel oxyhydroxide cobalt incorporation photodeposition electrocatalyst oxygen evolution reaction

Iterative HOEO fusion strategy:a promising tool for enhancing bearing fault feature

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Frontiers of Mechanical Engineering 2023年第1期18卷 253-273页

作者： Xingxing JIANG Demin PENG jianfeng guo Jie LIU Changqing SHEN Zhongkui ZHU School of Rail Transportation Soochow UniversitySuzhou 215131China China Academy of Railway Sciences Co.Ltd. Beijing 100094China School of Civil and Hydraulic Engineering Huazhong University of Science and TechnologyWuhan 430074China

As parameter independent yet simple techniques,the energy operator(EO)and its variants have received considerable attention in the field of bearing fault feature ***,the performances of these improved EO techniques are subjected to the limited number of EOs,and they cannot reflect the non-linearity of the machinery dynamic systems and affect the noise *** a result,the fault-related transients strengthened by these improved EO techniques are still subject to contamination of strong *** address these issues,this paper presents a novel EO fusion strategy for enhancing the bearing fault feature nonlinearly and ***,the proposed strategy is conducted through the following three ***,a multi-dimensional information matrix(MDIM)is constructed by performing the higher order energy operator(HOEO)on the analysis signal *** is regarded as the fusion source of the proposed strategy with the properties of improving the signal-to-interference ratio and suppressing the noise in the low-frequency ***,an enhanced manifold learning algorithm is performed on the normalized MDIM to extract the intrinsic manifolds correlated with the fault-related ***,the intrinsic manifolds are weighted to recover the fault-related *** studies and experimental verifications confirm that the proposed strategy is more effective for enhancing the bearing fault feature than the existing methods,including HOEOs,the weighting HOEO fusion,the fast Kurtogram,and the empirical mode decomposition.

关键词： higher order energy operator fault diagnosis manifold learning rolling element bearing information fusion

Observation on the aerosol and ozone precursors in suburban areas of Shenzhen and analysis of potential source based on MAX-DOAS

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Journal of Environmental Sciences 2023年第10期132卷 109-121页

作者： Hairong Zhang Ang Li Zhaokun Hu Hongmei Ren Hongyan Zhong jianfeng guo Long Yun Mingdi Zhang Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine MechanicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China Institutes of Physical Science and Information Technology Anhui UniversityHefei 230601China Shenzhen Environmental Monitoring Center Station Shenzhen 518049China

Long-term stereoscopic observations of aerosol,NO2,and HCHO were carried out at the Yangmeikeng(YMK)site in *** optical depths and NO2 vertical column concentration(NO2 VCD)derived from MAX-DOAS were found to be consistent with other *** total NO2 VCD values of the site remained low,varying from 2×10^(15)to 8×10^(15)mol/cm^(2),while the HCHO VCD was higher than NO2 VCD,varying from 7×10^(15)to 11×10^(15)mol/cm^(2).HCHO VCD was higher from September to early November than that was from mid-late November to December and during February 2021,in contrast,NO2 VCD did not change much during the same *** January,NO2 VCD and HCHO VCD were both fluctuating *** temperature and HCHO level in the YMK site is not only driving the ozone production up but alsomay be driving up the ozone concentration as well,and the O_(3)production regime in the YMK site tends to be *** various altitudes,backward trajectory clustering analysis and Potential Source Contribution Function(PSCF)were utilized to identify possible NO2 and HCHO source *** results suggested that the Huizhou-Shanwei border and the Daya Bay Sea area were the key potential source locations in the lower(200 m)and middle(500 m)atmosphere(WPSCF>0.6).The WPSCF valuewas high at the 1000maltitude whichwas closer to the YMKsite than the near ground,indicating that the pollution transport capability in the upper atmosphere was limited.

关键词： Multi-axial differential optical absorption spectroscopy (MAX-DOAS) Nitrogen dioxide(NO2) Formaldehyde(HCHO) Potential source contribution function(PSCF)

Satellite Thermal Infrared Earthquake Precursor to the Wenchuan M_s 8.0 Earthquake in Sichuan,China,and its Analysis on Geo-dynamics

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Acta Geologica Sinica(English Edition) 2009年第4期83卷 767-775页

作者： WEI Lejun guo jianfeng LIU Jianhua LU Zhenquan LI Haibing CAI Hui Chinese Academy of Geological Sciences Beijing 100037 China Haikou College of Economics Haikou Hainan 570203 China Seismological Bureau of Hainan Haikou Hainan 570203 China Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing 100037 China Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China Haikou Bureau of Earthquake Haikou Hainan 570145 China

Based on an interpretation and study of the satellite remote-sensing images of FY-2C thermal infrared 1st wave band （10.3-11.3 μm） designed in China, the authors found that there existed obvious and isolated satellite thermal infrared anomalies before the 5.12 Wenchuan Ms 8.0 Earthquake. These anomalies had the following characteristics：（1） The precursor appeared rather early： on March 18, 2008, i.e., 55 days before the earthquake, thermal infrared anomalies began to occur; （2） The anomalies experienced quite many and complex evolutionary stages： the satellite thermal infrared anomalies might be divided into five stages, whose manifestations were somewhat different from each other. The existence of so many anomaly stages was probably observed for the first time in numerous cases of satellite thermal infrared research on earthquakes; （3） Each stage lasted quite a long time, with the longest one spanning 13 days; （4） An evident geothermal anomaly gradient was distributed along the Longmen seismic fracture zone, and such a phenomenon might also be discovered for the first time in satellite thermal infrared earthquake research. This discovery is therefore of great guiding and instructive significance in the study of the earthquake occurrence itself and the trend of the postearthquake phenomena.

关键词： Wenchuan earthquake prediction ground-stress satellite thermal infrared short-term and impending earthquake precursor

Advanced atomic force microscopies and their applications in two-dimensional materials:a review

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Materials Futures 2022年第3期1卷 105-143页

作者： Rui Xu jianfeng guo Shuo Mi Huanfei Wen Fei Pang Wei Ji Zhihai Cheng Beijing Key Laboratory of Optoelectronic Functional Materials&Micro-nano Devices Department of PhysicsRenmin University of ChinaBeijing 100872People’s Republic of China Key Laboratory of Instrument Science and Dynamic Testing North University of ChinaTaiyuan 030051People’s Republic of China Key Laboratory of Quantum Sensing and Precision Measurement Institute of Instrument and ElectronicsNorth University of ChinaTaiyuan 030051People’s Republic of China

Scanning probe microscopy(SPM)allows the spatial imaging,measurement,and manipulation of nano and atomic scale surfaces in real *** the last two decades,numerous advanced and functional SPM methods,particularly atomic force microscopy(AFM),have been developed and applied in various research fields,from mapping sample morphology to measuring physical ***,we review the recent progress in functional AFM methods and their applications in studies of two-dimensional(2D)materials,particularly their interfacial physical properties on the *** review can inspire more exciting application works using advanced AFM modes in the 2D and functional materials fields.

关键词： atomic force microscopy advanced atomic force microscopy two-dimensional materials surface and interface

Biomimetic gold nanocomplexes for gene knockdown： Will gold deliver dividends for small interfering RNA nanomedicines？

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Nano Research 2015年第10期8卷 3111-3140页

作者： jianfeng guo Kamil Rahme Kathleen A. Fitzgerald Justin D. Holmes Caitriona M. O'Driscoll PharmacodeliveryGroup SchoolofPharmacyUniversityCollegeCorkCorkIreland DepartmentofSciences FacultyofNaturalandAppliedScienceNotreDameUniversity(Louaize)ZoukMosbeh1200Lebanon MaterialsChemistryandAnalysisGroup DepartmentofChemistryandtheTyndallNationalInstituteUniversityCollegeCorkCorkIreland AdvancedMaterialsandBioEngineeringResearch(AMBER) CentreforResearchonAdaptiveNanostructuresandNanodevices(CRANN)TrinityCollegeDublinDublin2Ireland

RNA interference （RNAi） effectors such as small interfering RNA （siRNA） and micro RNA （miRNA） can selectively downregulate any gene implicated in the pathology of a disease. Therefore, RNAi-based therapies have immense potential for the treatment of a wide range of diseases. However, pharmacokinetic and pharmacodynamic studies have revealed that these therapeutic agents have poor bioactivity due to a number of factors, including insufficient plasma drug levels, short plasma half-lives, renal clearance, and hepatic metabolism. Non-viral delivery may facilitate the clinical application of siRNA-based therapeutics by helping to overcome these barriers. Recently, the potential of gold nanoparticles （AuNPs） as multifunctional carriers for transporting drugs, proteins, and genetic materials has been demonstrated. In this review, some of the key properties of AuNPs relevant to siRNA delivery, such as physical properties and surface chemistry have been described. In addition, the ability of AuNP-based formulation strategies to successfully overcome delivery barriers associated with siRNA, and the potential for this material to translate into safe and effective nanomedicines are critically discussed.

关键词： siRNA delivery RNA interference (RNAi)-based therapeutics,mulfifunctionalnanoparficles,nanotoxicity of goldnanoparticles

Genetic variants in the 6p21.3 region influence hepatitis B virus clearance and chronic hepatitis B risk in the Han Chinese population

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Liver Research 2024年第1期8卷 54-60页

作者： Jiancheng Huang Mingkuan Su Fanhui Kong Hongbin Chen Shuiqing Wu jianfeng guo Haiying Wu Department of Laboratory Medicine Mindong Hospital Affiliated to Fujian Medical UniversityFuanFujianChina Department of Gastroenterology Mindong Hospital Affiliated to Fujian Medical UniversityFuanFujianChina

Background and aim:A genome-wide association study has indicated the association of numerous genes in the 6p21.3 region with chronic hepatitis B virus(HBV)*** this study,we screened 12 representative single-nucleotide polymorphisms(SNPs)from the 6p21.3 region and investigated their association with the risk of chronic hepatitis B(CHB)to better understand the molecular etiology un-derlying CHB risk in the Han Chinese ***:Between March 2021 and November 2022,we included 183 patients with CHB(case group)and 196 with natural HBV clearance(control group).Allele typing of the selected SNPs was performed using snapshot *** correlation between the 12 chosen SNPs and the risk of chronic HBV infection was examined using binary logistic regression *** genes of the variants were identified,and expression quantitative trait loci(eQTL)were analyzed using the 3DSNP ***:We validated 12 previously reported CHB susceptibility sites,including rs1419881 of tran-scription factor 19(TCF19),rs3130542 and rs2853953 of human leukocyte antigen(HLA)-C,rs652888 of euchromatic histone-lysine-methyltransferase 2(EHMT2),rs2856718,rs9276370,rs7756516,and rs7453920 of HLA-DQ,rs378352 of HLA-DOA,and rs3077,rs9277535,and rs9366816 of *** regression analyses revealed that polymorphisms such as rs9276370,rs7756516,rs7453920,rs3077,rs9277535,and rs9366816 were positively correlated with natural HBV clearance in the dominant ***,rs3130542 and rs378352 were identified as risk factors for *** analysis revealed that rs9276370,rs7756516,and rs7453920 in HLA-DQ were TTG and GCA *** the TTG haplotype was positively correlated with a higher risk of CHB,the GCA haplotype significantly influenced the natural clearance of *** analysis demonstrated that rs378352,rs3077,and rs9366816 were located within enhancer states;rs3077 and rs9366816 overlapped with nine tran-scription factor-bindi

关键词： Chronic hepatitis B(CHB) Expression quantitative trait loci(eQTL) Haplotype Hepatitis B virus(HBV) Human leukocyte antigen(HLA) Single-nucleotide polymorphism(SNP)

尺度因子的MAD估计及其在测量平差中的应用

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武汉大学学报（信息科学版） 2021年第11期46卷 1636-1640页

作者：郭建锋中原工学院理学院河南郑州450007

观测数据受到粗差污染时,平差结果往往失真,不可采用。选择合适的统计检验量是对测量数据进行粗差处理的关键一环,而构造统计检验量必须对尺度因子做出估计。首先对样本尺度因子的绝对中位差(median absolute deviation,MAD)估计进行了... 详细信息

观测数据受到粗差污染时,平差结果往往失真,不可采用。选择合适的统计检验量是对测量数据进行粗差处理的关键一环,而构造统计检验量必须对尺度因子做出估计。首先对样本尺度因子的绝对中位差(median absolute deviation,MAD)估计进行了讨论,并详细探讨了其中涉及到的Fisher一致性调节因子的确定;然后在此基础上,分别提出了平差模型中基于标准化残差和一致最大功效(uniformly most powerful,UMP)统计检验量序列的尺度因子的两种抗差估计方法,尺度因子的两种抗差估计都可用于构造相应的统计检验量以识别和定位可疑观测量;最后对全球导航卫星系统(global navigation satellite systems,GNSS)网平差进行具体数值计算,结果表明,尺度因子的MAD估计具有良好的抗差性,不但可用于粗差处理,还可用于平差成果的精度评定。

关键词：尺度因子粗差探测抗差估计 MAD估计

Effect of myosin heavy chain composition of muscles on meat quality in Laiwu pigs and Duroc

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Science China(Life Sciences) 2008年第2期51卷 127-132页

作者： HU HongMei, WANG JiYing, ZHU RongSheng, guo jianfeng & WU Ying Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan 250100, China 1. Institute of Animal Science and Veterinary Medicine Shandong Academy of Agricultural Sciences Jinan 250100 China

In order to explain the mechanism of high meat quality in Laiwu pigs and investigate the relation between myosin heavy chains (MyHC) composition and meat quality, meat quality analysis was conducted and mRNA expression of MyHC I, IIa, IIx, IIb was quantified by real-time fluorescence PCR in longissimus muscle (LM) and semimembranous muscle of Laiwu pigs and Duroc. The result indicated that, compared with Duroc, mRNA expression of MyHC IIa, IIx in LM and semimembranous muscle of Laiwu pigs was significantly increased, mRNA expression of MyHC IIb was dramatically decreased. However, the expression of MyHC I was not significantly affected by breeds. The correlation between mRNA expression of MyHC I, IIa, IIx in LM and meat color, pH value, marbling, intramuscular fat content was positive, but shear value of LM was negative. The relation between MyHC IIb mRNA expression and marbling, intramuscular fat content was dramatically negative, whereas shear value was strikingly positive, as well as fiber diameter, but without reaching statistical significance. Therefore, the composition of MyHC I, IIa, IIx, IIb affected meat quality, furthermore, expression of MyHC I, IIa, IIx, IIb mRNA prominently influenced meat characteristics, especially edible quality of muscle, suggesting that mRNA expression level of MyHC I, IIa, IIx, IIb can exactly and impersonally estimate meat quality.

关键词： Laiwu pigs myosin heavy chain real-time PCR meat quality