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A precipitate-free AlCoFeNi eutectic high-entropy alloy with strong strain hardening

Journal of Materials Science & Technology 2021年第30期89卷 88-96页

作者： Peijian Shi Yi Li Yuebo Wen Yiqi Li Yan Wang Weili Ren Tianxiang Zheng yifeng Guo Long Hou Zhe Shen Ying Jiang Jianchao Peng Pengfei Hu Ningning Liang Qingdong Liu Peter K.Liaw Yunbo zhong State Key Laboratory of Advanced Special Steel&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering Shanghai UniversityShanghai200444China Materials Genome Institute Shanghai UniversityShanghai200444China Laboratory for Microstructures Shanghai UniversityShanghai200444China School of Materials Science and Engineering Nanjing University of Science and TechnologyJiangsu210094China Institute of Materials Modification and Modelling School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China Department of Materials Science and Engineering The University of TennesseeKnoxvilleTN37996USA

Over recent years,eutectic high-entropy alloys(EHEAs)have intrigued substantial research enthusiasms due to their good castability as well as balanced strength-ductility *** this study,a bulk cast Al_(19.25)Co_(18.86)Fe_(18.36)Ni_(43.53)EHEA is developed with fine in-situ lamellar *** eutectics comprise alternating ordered face-centered-cubic(L1_(2))and ordered body-centered-cubic(B2)phases with semicoherent *** resulting microstructure resembles that of most reported as-cast EHEAs,but the B2 lamellae are devoid of nano-precipitates because of the Cr-element removal in current tailored eutectic ***,the B2 lamellae still feature much higher deformation resistance than the L1_(2) lamellae,so that less lattice defects are detected in the B2 lamellae until the *** interestingly,in the L1_(2) lamellae we identify a dynamic microstructure refinement that correlates to extraordinary strain hardening in *** precipitate-free EHEA consequently shows excellent tensile ductility of~10%and high ultimate strength up to~956 MPa.

关键词： High-entropy alloy Lamellar eutectic Deformation resistance Microstructure refinement Strain hardening

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基于红外相机技术的桃红岭梅花鹿国家级自然保护区白鹇种群活动节律分析

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现代农业科技 2021年第19期 182-184,194页

作者：王贤芳钟毅峰詹建文刘武华吴问国高依敏张楚邵瑞清曹开强李言阔九江市林业局江西九江332000 江西师范大学生命科学学院江西南昌330022 江西桃红岭梅花鹿国家级自然保护区管理局江西九江332700

本文基于红外相机技术对桃红岭梅花鹿国家级自然保护区白鹇种群活动节律进行了分析。结果表明,白鹇的日活动时间集中在5:00—19:00,全年的日活动节律呈现出明显的昼行性,存在2个活动高峰,分别为8:00—9:00和14:00—16:00。白鹇繁殖期与... 详细信息

本文基于红外相机技术对桃红岭梅花鹿国家级自然保护区白鹇种群活动节律进行了分析。结果表明,白鹇的日活动时间集中在5:00—19:00,全年的日活动节律呈现出明显的昼行性,存在2个活动高峰,分别为8:00—9:00和14:00—16:00。白鹇繁殖期与非繁殖期日活动节律的重叠系数为0.68,日活动节律曲线差异极显著(P<0.01)。繁殖期间,白鹇的日活动节律存在2个活动高峰,分别为6:00—7:00和17:00—19:00;非繁殖期间,白鹇的日活动节律也存在2个高峰,分别为7:00—9:00和14:00—16:00。本研究可为保护区内白鹇的保护管理提供参考。

关键词：白鹇活动节律红外相机技术

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Ultrasound imaging and evaluation of lesion induced by High Intensity Focused Ultrasound

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Chinese Journal of Acoustics 2006年第2期25卷 104-115页

作者： zhong Hui WAN Mingxi JIANG yifeng WANG Supin The Key Laboratory of Biomedical Information Engineering of Ministry of Education and Department of Biomedical Engineering School of Life Science and Technology Xi'an Jiaotong University Xi'an 710049

The present study was to investigate the differential imaging method for detecting HIFU （High Intensity Focused Ultrasound）-induced lesions and the estimation of variation of attenuation for lesion evaluation with log spectral difference algorithm. Experiment results of bovine muscle and liver in vitro were acquired. Several algorithms for lesion detection - Absolute Difference （AD）, Sum Absolute Differences （SAD） and Sum Squared Differences （SSD） - were analyzed with several window sizes and threshold values. Then three attenuation parameters were compared to evaluate the degree of tissue damage. It was found that variation of the mean attenuation △a^- was an effective parameter to evaluate lesions.

关键词： Focused Ultrasound threshold values in vitro

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变开度岩体裂隙多相渗流实验与有效渗透率模型

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力学学报 2023年第2期55卷 543-553页

作者：胡冉钟翰贤陈益峰武汉大学水资源与水电工程科学国家重点实验室武汉430072 武汉大学水工岩石力学教育部重点实验室武汉430072

岩体裂隙的有效渗透率是描述岩体非饱和或多相渗流的关键参数,而裂隙开度是影响有效渗透率的重要因素.通过自主研发的粗糙裂隙多相渗流可视化实验平台,针对天然岩体裂隙复制而成的裂隙模型开展变开度条件下的多相渗流可视化实验,研究开... 详细信息

岩体裂隙的有效渗透率是描述岩体非饱和或多相渗流的关键参数,而裂隙开度是影响有效渗透率的重要因素.通过自主研发的粗糙裂隙多相渗流可视化实验平台,针对天然岩体裂隙复制而成的裂隙模型开展变开度条件下的多相渗流可视化实验,研究开度变化对多相渗流流动结构以及有效渗透率的影响.研究表明:非湿润相流体运动通道,在低流量比条件下呈现出气泡流流动结构,而在高流量比条件下呈现较为稳定的通道流流动结构.随着开度的增加,非湿润相流动通道的分支变少、等效宽度增加,两相流体的有效渗透率均增大,流动结构趋于稳定.可视化结果还阐明了柱塞流流动结构下,两相流体交替占据裂隙空间的竞争机制:当非湿润相流体通道由连续转变为不连续时,裂隙进出口压差显著增加;反之,当该通道由不连续转变为连续时,压差显著减小.最后,基于分形理论以及渗透率统计建模方法,建立了考虑开度效应的岩体裂隙多相渗流有效渗透率理论模型,并通过实验测定的有效渗透率数据验证了该模型的正确性与有效性.

关键词：岩体裂隙多相渗流裂隙开度流动结构有效渗透率模型

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广州乙烯装置裂解炉节能改造

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乙烯工业 2010年第1期22卷 54-57页

作者：徐忠罗艺锋中国石油化工股份有限公司广州分公司化工一部广东广州510726

针对广州乙烯装置6台裂解炉存在排烟温度高、热效率偏低、能耗偏大等问题进行分析,提出了节能改造措施。改造实施后,减少了裂解炉的燃料和电力消耗。

关键词：裂解炉节能空气预热器变频风机

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Personality of Fran?ois' langur(Trachypithecus francoisi) in captivity

Personality of Fran?ois' langur(Trachypithecus francoisi) in...

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第十六届全国野生动物生态与资源保护学术研讨会

作者： Xinling Gan Yanfei Zhang yifeng Li Yanhong,zhong zhonghao Huang Youbang Li Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection(Guangxi Normal University) Ministry of Education Guangxi Key Laboratory of Rare and Endangered Animal Ecology Guangxi Normal University Wuzhou Institute of Landscape Animals and Botany

Personality is believed to occur in various animals and is of great significance to the ability of a species to cope with the change of living resources and environment, thus studies of which are beneficial to ex-situ conservation and potential reintroduction by improving management of captive animals. Between November 2017 and November 2018, using behavioral observation, Hominoid Personality Questionnaire（HPQ） ratings, we studied the personality of 40 captive Fran?ois' langurs（Trachypithecus francoisi） at the Wuzhou Langur Breeding Center of Guangxi, China. We also conducted experimental behavior test on 28 langurs to examine boldness and exploration in open areas of the breeding center. Principal component analysis on the average scores of 49 available items retained in the personality questionnaire showed that there were four personality traits in the captive Fran?ois' langurs, inluding Openness Q, Dominance Q, Aggressiveness Q, and Neuroticism Q, the scores of these four personality traits and their corresponding adjective items. Males were significantly higher score of aggressiveness（U = 126, p = 0.04）, and lower ones of sociality（U = 65.5, p<0.001） and activity（U = 113, p = 0.02） than females. Nevertheless, there was no significant difference between the sexes in boldness（U = 69.5, p = 0.256） and exploratory tendency（U = 69, p = 0.25）. Personality traits of the langurs varied significantly among different age groups（aggressiveness: c = 13.47, df = 4, p = 0.01, activity: c = 18.65, df = 4, p < 0.001）. However, there was no significant difference in sociality（c = 5.62, df = 4, p = 0.23）, boldness（c = 1.29, df = 3, p = 0.73） and exploratory tendency（c = 2.27, df = 3, p = 0.52） among ages. The results of this study can provide guidance rational allocation of cage and mate according to personality, improve reproductive success, reduce or alleviate stress response and aggression. This study highlights the importance of considering species' personality when conductin

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瓷土矿尾砂在传统陶瓷中的应用研究

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佛山陶瓷 2024年第3期34卷 48-50页

作者：钟鸿雁徐文灏江西省景德镇生态环境监测中心景德镇333000

采用XRF、XRD、白度测定等测试方法,研究了江西宜丰县瓷土矿尾砂的化学组成、矿相组成、物化性能。以该瓷土矿尾砂、龙岩高岭土、修水长石、上祝瓷石为主要原料,研制了1310℃还原焰烧成的陶瓷餐具。研究结果表明:该瓷土矿尾砂可应用于... 详细信息

采用XRF、XRD、白度测定等测试方法,研究了江西宜丰县瓷土矿尾砂的化学组成、矿相组成、物化性能。以该瓷土矿尾砂、龙岩高岭土、修水长石、上祝瓷石为主要原料,研制了1310℃还原焰烧成的陶瓷餐具。研究结果表明:该瓷土矿尾砂可应用于日用陶瓷的生产。

关键词：瓷土矿尾砂工艺性能成瓷试制

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Efficacy of Biological and Physical Enhancement on Targeted Muscle Reinnervation

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Cyborg and Bionic Systems 2022年第1期2022卷 55-63页

作者： Siyang zhong Zijun Zhang Huan Su Chenyang Li yifeng Lin Wei Lu Zhendong Jiang Lin Yang Department of Basic Education Zhuhai Campus of Zunyi Medical UniversityZhuhaiChina School of Resources Environmental and Chemical EngineeringNanchang UniversityChina CAS Key Laboratory of HumanMachine InteligenceSymergy Systems Shenzhen Insttutes of Advanced TechnologyChinese Academy of Sciences(CAS)Shenzhen 518055China

Targeted muscle reinnervation(TMR)is a microsurgical repair technique to reconstruct the anatomical structure between thedistal nerve and the muscle stump to provide more myoelectric information to the artificially intlligent *** functional electrical stimulation treatment of the patient's denervated muscle or proximal nerve stump as well asnerve growth factor injection is effective in promoting nerve regeneration and muscle function *** this experiment,wesuccessfully established a TMR rat model and divided Sprague-Dawley(SD)adult male rats into IMR group,TMR+FESgroup,and TMR+NGF group acording to TMR and whether they received FES treatment or NGF injection after *** the recovery ffect of rat neuromuscular function was assessed by analyzing EMG *** the experiments,weconfrmed that growth factor supplementation and lowfrequency electrical stimulation can efectively promote theregeneration of the transplanted nerve as well as signifcantly enhance the motor function of the target muscle and have a positive effect on the regeneration of the transplanted nerve.

关键词： injection function treatment

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Self-anti-angiogenesis nanoparticles enhance anti-metastatic-tumor efficacy of chemotherapeutics

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Bioactive Materials 2022年第7期7卷 179-190页

作者： Jiamao Luo Xinxian zhong Yingming Peng Chenyuan Hao Xiaomei Liang Yulu Yang Xiubo Shi Xuncai Chen Xiao Yi iaoxuan Li Jianhua Wu Jinheng Li Qian Xiao Chentian Wu b Ruojing Lu b Yao Pan Xuejiao Wang Jun-Bing Fan yifeng Wang Ying Wang Department of Obstetrics&Gynecology Zhujiang HospitalSouthern Medical UniversityGuangzhou510280China Guangzhou Key Laboratory of Tumor Immunology Research Cancer Research InstituteSchool of Basic Medical SciencesSouthern Medical UniversityGuangzhou510515China Department of Forensic Toxicology School of Forensic MedicineSouthern Medical UniversityGuangzhou510515China

Beyond traditional endothelium-dependent vessel(EDV),vascular mimicry(VM)is another critical tumor angiogenesis that further forms in many malignant metastatic ***,the existing anti-angiogenesis combined chemotherapeutics strategies are only efficient for the treatment of EDV-based subcutaneous tumors,but remain a great challenge for the treatment of in situ malignant metastatic tumor associated with EDV and ***,we demonstrate a self-assembled nanoparticle(VE-DDP-Pro)featuring self-anti-EDV and-VM capacity enables to significantly enhance the treatment efficacy of cisplatin(DDP)against the growth and metastasis of ovarian *** VE-DDP-Pro is constructed by patching DDP loaded cRGD-folate-heparin nanoparticles(VE)onto the surface of protamine(Pro)*** demonstrated the self-anti-angiogenesis capacity of VE-DDP-Pro was attributed to VE,which could significantly inhibit the formation of EDV and VM by regulating signaling pathway of MMP-2/VEGF,AKT/mTOR/MMP-2/Laminin and AKT/mTOR/EMT,facilitating chemotherapeutics to effectively suppress the development and metastasis of ovarian ***,combing with the chemotherapeutics effectiveness of DDP,the VE-DDP-Pro can significantly enhance treatment efficacy and prolong median survival of mice with metastatic ovarian *** believe our self-assembled nanoparticles integrating the anti-EDV and anti-VM capacity provide a new preclinical sight to enhance the efficacy of chemotherapeutics for the treatment malignant metastasis tumor.

关键词： self-anti-angiogenesis Nanoparticles Metastatic ovarian cancer VM EDV

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硫酸铵水溶液中分散聚合法制备两性共聚物P(AM-co-AA-co-DAC-co-DMC)

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高分子学报 2010年第5期20卷 530-535页

作者：沈忠连虹艳周艺峰聂王焰安徽大学化学化工学院安徽省绿色高分子材料重点实验室合肥230039

利用分散聚合技术,在硫酸铵水溶液中以丙烯酰胺(AM)、丙烯酸(AA)、丙烯酰氧乙基三甲基氯化铵(DAC)、甲基丙烯酰氧乙基三甲基氯化铵(DMC)为单体,合成了两性共聚物P(AM-co-AA-co-DAC-co-DMC).用FTIR,13C-NMR,TEM等方法表征了聚合物的结构... 详细信息

利用分散聚合技术,在硫酸铵水溶液中以丙烯酰胺(AM)、丙烯酸(AA)、丙烯酰氧乙基三甲基氯化铵(DAC)、甲基丙烯酰氧乙基三甲基氯化铵(DMC)为单体,合成了两性共聚物P(AM-co-AA-co-DAC-co-DMC).用FTIR,13C-NMR,TEM等方法表征了聚合物的结构和组成.考察了不同分散稳定剂、正负离子单体配比和pH对分散聚合的影响,并对P(AM-co-AA-co-DAC-co-DMC)水基分散聚合条件及稳定性进行了一些探讨.实验表明,在硫酸铵水溶液中制得较稳定的P(AM-co-AA-co-DAC-co-DMC)分散体系,应选用非离子型或阳离子型的分散稳定剂,如聚乙烯吡咯烷酮(PVP)、聚甲基丙烯酰氧乙基三甲基氯化铵(PDMC)、聚丙烯酰氧乙基三甲基氯化铵(PDAC),而其pH应在2到4之间.当选用占总质量1.5%的聚乙烯吡咯烷酮(PVP)为分散稳定剂,引发温度为40℃,正负离子单体物质的量比值大于1,pH=3时,可以制得总离子度超过25%的纳米级两性聚合物.

关键词：水基分散聚合两性共聚物丙烯酰胺分散剂

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