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Journal of Materials Science & Technology 2021年第16期75卷 265-275页

作者： Zhixin Zhang Jiangkun Fan Ruifeng Li Hongchao Kou zhiyong chen Qingjiang Wang Hailong Zhang Jian Wang Qi Gao Jinshan Li State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'an 710072China National Local Joint Engineering Research Center for Precision Thermoforming Technology of Advanced Metal Materials Xi'an 710072China Baoji Titanium Industry Co. Ltd.Baoji 721014China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China Baoti Group Co. Ltd.Baoji 721014China

The mill products like sheet always have one or more severe textures inevitably,and its effect on mechanical properties is not a negligible *** orientation dependent tensile-creep behavior induced by rolling texture of Ti65 titanium alloy sheet has been systematically investigated at 650℃.There are some anisotropic characteristics between TD and RD of Ti65 *** UTS and TYS of TD are higher than RD at 650℃.Besides,the creep endurance time of TD(172.6–174.5 h)is about three times longer than RD(55.6–65.1 h)at 650℃and 240 ***,the grains are inclined to form Texture III■after creep along with TD,but to form Texture I■after creep along with ***,the crack initiation site is different during creep in TD and *** reason for anisotropic properties of tensile and creep has been summarized in two aspects:(i)the change of the SFs(Schmid factors)value between TD and RD;(ii)the difference of creep mechanism between TD(grain boundary sliding)and RD(dislocation slip).Anisotropy of Ti65 sheet should be fully considered to increase structural efficiency in the engineering design and application.

关键词： Titanium alloy Texture Anisotropy Tensile Creep

Phylogenetic diversity of bacterial biofilms covering the settlement substrates of nona-porous abalones (Haliotis diversicolor supertexta)

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Acta Oceanologica Sinica 2009年第5期28卷 94-102页

作者： MA Ying WANG zhiyong chen Zhengqiang LU Yu WANG Lin The Key Laboratory of Science and Technology for Aquaculture and Food Safety Fisheries College Jimei University Xiamen 361021 China

The settlement substrates of nona-porous abalones （Haliotis diversicolor supertexta） are covered with biofilms in which several types of microorganisms coexist and interact. These microorganisms are usually important causes of juvenile abalone disease as well as organisms useful in promoting abalones’ adhesion. The bacterial community structure of the biofilms remains unclear. The aim of this research was to determine the genetic diversity and phylogenetic affiliation of the biofilm bacteria. Total DNA of bacteria in biofilms was extracted, and 16S rRNA gene clone library was constructed using the primers specific for the domain bacteria. Subsequently, 30 randomly selected positive clones were screened by PCR-restriction fragment length polymorphism （PCR-RFLP） analysis, and resulted in 15 different RFLP patterns. Sequences analysis of representatives from each unique RFLP type revealed high genetic diversity in the bacterial populations. These sequences fell into nine major lineages of the bacterial domains： α-, β-, γ-and δ-subdivisions of the Proteobacteria; Planctomycete, Actinobacteria, Firmicutes, V errucomicrobium spp., and CytophagaFlexibacter-Bacteroides spp. Phylogenetic analysis indicated that the dominant phylotypes were most closely related to environmental and clinical Burkholderia cepacia of the β-Proteobacteria, and Roseobacteria of the α-Proteobacteria.

关键词： nona-porous abalone (Haliotis diversicolor supertexta) settlement substrate bacterial biofilm 16S rRNA

Reveal the pharmacodynamic substances and mechanism of an edible medicinal plant Rhodiola crenulate in DSS-induced colitis through plasma pharmacochemistry and metabolomics

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Food Science and Human Wellness 2024年第4期13卷 2116-2131页

作者： Yu Peng Xiaoao Xiao Tingting Ji Xinyuan Wang Yixuan Xu Jianbo Xiao Hui Cao zhiyong chen Huifan Liu Yuanqing Gao Hongxun Tao Key Laboratory of Cardiovascular and Cerebrovascular Medicine School of PharmacyNanjing Medical UniversityNanjing 211166China School of Food and Biological Engineering Jiangsu UniversityZhenjiang 212013China Department of Analytical Chemistry and Food Science Faculty of ScienceUniversity of VigoVigo 36310Spain CISPAC Fontan BuildingCity of CultureSantiago de Compostela 15707Spain Shaanxi Academy of Traditional Chinese Medicine Xi'an 710003China Guangdong Key Laboratory of Science and Technology of Lingnan Specialty Food Zhongkai University of Agriculture and EngineeringGuangzhou 510550China State Key Laboratory of Southwestern Chinese Medicine Resources Chengdu 610075China

Rhodiola crenulate is the edible medicinal herbal medicine widely used for altitude sickness in ***,our previous work has found that *** extract(RCE)could significantly improve the pathology associated with dextran sulfate sodium-induced ***,the current research aims to reveal the pharmacodynamic material basis of RCE,as well as its mechanism against *** chemical characterization of RCE was performed by UHPLC-HR-MS,through which a total of 88 constituents were ***,our results also found 29 constituents absorbed into blood and 8 metabolized absorbable *** decreased flavonoids prototype and the elevated sulfated products of phenols were observed under pathophysiological conditions of *** metabolomics study revealed that colitis caused the alternation of fatty acid metabolism,steroid hormone biosynthesis and bile acid ***,RCE could prevent colitis by improving fatty acid metabolism and secondary bile acid metabolism.

关键词： Rhodiola crenulate Colitis Chemical characterization Plasma pharmacochemistry Metabolomics

ARTIFICIAL INTELLIGENCE-DRIVEN FOG-COMPUTING-BASED RADIO ACCESS NETWORKS

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China Communications 2019年第11期16卷 I0001-I0002页

作者： Mugen Peng Jie Zhang Shuai Han zhiyong chen Chonggang Wang IEEE ACCESS IEEE Internet of Things Journal Sheffield University Department of Electronics and Communication Engineering Harbin Institute of Technology Shanghai Jiao Tong University China InterDigital company

The edge cache is an effective way to reduce the heavy traffic load and the end-to-end latency in radio access networks(RANs)for supporting a number of critical Internet of Things(IoT)services and *** has been verified to provide high spectral efficiency,high energy efficiency,and low *** exploit the advantages of edge cache,a paradigm of fog computing-based radio access networks(F-RANs)has emerged to provide great flexibility to satisfy quality-of-service requirements of various IoT applications in the fifth generation(5G)wireless systems.

关键词： cache ACCESS services

Nickel Complexes with Non-innocent Ligands as Highly Active Electrocatalysts for Hydrogen Evolution

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Chinese Journal of Chemistry 2018年第12期36卷 1161-1164页

作者： Zhixin chen Tao Wang Tingting Sun zhiyong chen Tian Sheng Yu-Hao Hong Zi-Ang Nan Jun Zhu Zhi-You Zhou Haiping Xia Shi-Gang Sun Collaborative Innovation Center of Chemistry for Energy Materials State Key Laboratory for Physical Chemistry of Solid SurfacesCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamenFujian 361005China

Rational design of a molecular catalyst for a hydrogen evolution reaction (HER) with both high rates and low overpotential remains a challenge. Here we report a series of Ni‐based catalysts incorporating non‐innocent ligands and aimed at reduction of the overpotential by reserving electrons in the ligand, which could decouple the correlation between metal center reduction and metal hydride formation. The third‐order rate constant of our catalysts can be increased by 2 orders of magnitude without increase of overpotential by altering the substituents in the imide since the electronic effect of substituents can change the kinetics of metal hydride formation dramatically. Furthermore, constructing a proton shuttle in the ligand further improves the activity. The catalyst with both of these features can catalyze HER at a turnover frequency of 2572 s –1 with low concentrations of acid and an extremely high third‐order rate constant of 2.7×10 6 M –2 ·s –1 at a low overpotential.

关键词： hydrogen evolution molecular electrocatalysis non‐innocent ligand electrochemistry homogeneous catalysis N ligands

Surface Wave Group Velocity Tomography Imaging from Ambient Noise for Fujian Province and Its Adjacent Areas

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Earthquake Research in China 2019年第1期33卷 52-61页

作者： ZHANG Lina LUO Yan chen zhiyong XIE Zhizhao ZHOU Lanjie ZENG Xiangfang Xiamen Seismic Survey Research Center Fujian Earthquake Agency Institute of Earthquake Forecasting CEA Fujian Earthquake Agency State Key Laboratory of Geodesy and Earths Dynamics Institute of Geodesy and Geophysics Chinese Academy of Sciences

Two-month continuous waveforms of 108 broadband seismic stations in Fujian Province and its adjacent areas are used to compute noise cross-correlation function(NCF). The signal quality of NCF is improved via the application of time-frequency phase weighted stacking. The Rayleigh and Love waves group velocities between 1 s-20 s are measured on the symmetrical component of the NCF with the multiple filter method. More than 5,000 Rayleigh wave dispersion curves and about 4,000 Love wave dispersion curves are obtained and used to invert for group velocity maps. This data set provides about 50 km resolution that is demonstrated with checkerboard tests. Considering the off great circle effect in inhomogeneous medium, the ray path is traced based on the travel time field computed with a finite difference method. The inverted group velocity maps show good correlation with the geological features in the upper and middle crust. The Fuzhou basin and Zhangzhou basin showed low velocity on the short period group velocity maps. On the long period group velocity maps, the low velocity anomaly in the high heat flow region near Zhangzhou and clear velocity contrast across the Zhenghe-Dapu faults, which suggests that the Zhenghe-Dapu fault might be a deep fault.

关键词： Fujian Ambient noise Surface wave group velocity Tomography imaging

Highly efficient isomerization of glucose to fructose over Sn-doped silica nanotube

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Resources Chemicals and Materials 2024年第2期3卷 159-165页

作者： Yajiao Cui Zhi Yang Xiongtao Hu Shufei Yang Armin Rezayan Tianliang Lu zhiyong chen Yongsheng Zhang School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001China School of Mechanical and Power Engineering Zhengzhou UniversityZhengzhou 450001China Henan Key Laboratory of Green Manufacturing of Biobased Chemicals Hongye Biological Technology Co.Ltd.Puyang457000China

Isomerization of glucose to fructose is a fundamental and key intermediate process commonly included in the production of valuable chemicals from carbohydrates in *** of fructose yield is a *** this work,Sn-doped silica nanotube(Sn-SNT)was developed as a highly efficient Lewis acid catalyst for the selective isomerization of glucose to *** Sn-SNT,69.1%fructose yield with 78.5%selectivity was obtained after reaction at 110◦C for 6 *** sole presence of a large amount of Lewis acid sites in Sn-SNT without Brønsted acid site is one of the reasons for the high fructose yield and ***,high density of Si􀀀OH groups in Sn-SNT can ensure the presence of Si􀀀OH groups near the Sn sites,which is important for the isomerization of glucose to fructose,leading to the high fructose yield and ***,the Sn-SNT is recyclable.

关键词： Glucose Fructose Lewis acid Isomerization

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柔性空间机械臂振动抑制的模糊终端滑模控制

振动．测试与诊断 2010年第5期30卷 481-486页

作者：陈志勇陈力福州大学机械工程及自动化学院福州 350108

针对载体位置不受控、姿态受控的情况,提出了柔性空间机械臂振动抑制的模糊终端滑模控制方案。利用假设模态法、系统动量守恒关系及拉格朗日方法,导出了柔性空间机械臂的系统动力学方程。为解决柔性空间机械臂轨迹跟踪控制及振动抑制问... 详细信息

针对载体位置不受控、姿态受控的情况,提出了柔性空间机械臂振动抑制的模糊终端滑模控制方案。利用假设模态法、系统动量守恒关系及拉格朗日方法,导出了柔性空间机械臂的系统动力学方程。为解决柔性空间机械臂轨迹跟踪控制及振动抑制问题,运用奇异摄动法将系统分解为慢变、快变两个子系统并分别设计了控制器。慢变子系统采用具有较强鲁棒性的模糊终端滑模控制方案,快变子系统则采用基于降阶状态观测器的线性二次型最优控制器(linear quadratic regulator,简称LQR)。数值模拟结果表明,本文的控制方案不仅保证了柔性空间机械臂载体姿态及机械臂各关节铰跟踪误差在有限时间内的收敛性,而且还大大地降低了滑模控制所固有的抖振,并对柔性臂的振动具有良好的抑制效果。

关键词：奇异摄动法模糊终端滑模控制振动抑制柔性空间机械臂

Relationship Between Substrate Water Content and Weight Loss,Mycelium Culture Time and Hypsizygus marmoreus Growth Yields

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食用菌学报 2008年第3期15卷 27-30页

作者： GAO Junhui FENG zhiyong chen Hui Key Laboratory of Applied Mycological Resources and Utilization Ministry of Agriculture the People＇s Republic of China Shanghai Research Center for Edible Fungi Biotechnology and Engineering Key Laboratory of Agricultural Genetics and Breeding of Shanghai Institute of Edible Fungi Shanghai Academy of Agricultural Sciences Shanghai 201106 China

Changes in the weight and water content of the growth substrate at different cultivation times significantly affected Hypsizygus marmoreus growth *** growth yields(132.6~146.3 g per culture) were achieved when the mycelium culture and maturation period was between 80 and 90 days,and the substrate water content was 73%~74%.Physiological maturation of *** mycelium was correlated with the substrate water content.

关键词：水分含量体重菌丝培养时间菇