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Large reversible cryogenic magnetocaloric effect in rare earth iron carbides of composition RE_(2)FeC_(4)(RE=Ho,Er,and Tm)

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Journal of Rare Earths 2023年第12期41卷 1996-2001,I0006页

作者： jianjian gong Qi Fu Hao Sun Lu Tian Xinqiang Gao Zhenxing Li Zhaojun Mo Jun Shen School of Rare Earths University of Science and Technology of ChinaHefei230026China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou341119China Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100190China

At cryogenic temperatures,the investigations of magnetic phase transition and magnetocaloric effect in RE_(2)FeC_(4)(RE=Ho,Er,and Tm) compounds were ***_(2)FeC_(4)and Er_(2)FeC_(4)compounds undergo two magnetic phase transitions with the temperature decreasing:from paramagnetic(PM) to ferromagnetic(FM) transition at their respective Curie temperature(Tc) and from FM to antiferromagnetic(AFM) or ferrimagnetic(FIM) transition below 2 ***_(2)FeC_(4)compound exhibits only a second-order PM to FM phase transition at TC=*** reversible MCE without hysteresis loss is observed in RE_(2)FeC_(4)(RE=Ho,Er,and Tm) ***,the maximum value of magnetic entropy change(-ASM)is 21.62 J/(kg K) under the magnetic field change(Δ_(μ0)H) of 0-5 T for Er_(2)FeC_(4).The Er_(2)FeC_(4)compound presenting excellent magnetocaloric performance makes it a competitive cryogenic magnetic refrigeration material.

关键词： RE_(2)FeC_(4)(RE=Ho Er and Tm)compounds Magnetocaloric effect Magnetic phase transition Cryogenic magnetic refrigeration Rare earths

Magnetic properties and magnetocaloric effects of Tm_(1-x)Er_(x)CuAl(x=0.25,0.5,and 0.75)compounds

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Chinese Physics B 2022年第12期31卷 504-509页

作者： Hao Sun Junfeng Wang Lu Tian jianjian gong Zhaojun Mo Jun Shen Baogen Shen School of Rare Earths University of Science and Technology of ChinaHefei 230026China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou 341000China Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

We investigate the structural,magnetic,and magnetocaloric effects(MCE)of Tm_(1-x)Er_(x)CuAl(x=0.25,0.5,and 0.75)*** compounds undergo a second-order phase transition originating from the ferromagnetic to paramagnetic transition around 3.2 K,5 K,and 6 K,*** maximum magnetic entropy changes(-△S_(M)^(max))of Tm_(1-x)Er_(x)CuAl(x=0.25,0.5,and 0.75)are 17.1 J·kg^(-1)·K^(-1),18.1 J·kg^(-1)·K^(-1),and 17.5 J·kg^(-1)·K^(-1)under the magnetic field in the range of 0-2 T,with the corresponding refrigerant capacity(RC)values of 131 J·kg^(-1),136 J·kg^(-1),and 126 J·kg^(-1),*** increase of-△S_(M)^(max)for Tm0.5Er0.5CuAl may be relevant to the change of magnetic moment distribution of Er and stress coming from element *** work provides several compounds that can enrich the family of giant MCE materials in the cryogenic region.

关键词： TmCuAl-based alloy magnetic property magnetocaloric effect magnetic refrigeration

Magnetic properties and magnetocaloric effect in RE_(55)Co_(30)Al_(10)Si_(5)(RE=Er and Tm)amorphous ribbons

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Chinese Physics B 2022年第11期31卷 560-565页

The magnetic and magnetocaloric effects(MCE)of the amorphous RE_(55)Co_(30)Al_(10)Si_(5)(RE=Er and Tm)ribbons were systematically investigated in this *** with R=Er and Tm undergo a second-order magnetic phase transition from ferromagnetic(FM)to paramagnetic(PM)around Curie temperature T_(C)~9.3 K and 3 K,*** Er_(55)Co_(30)Al_(10)Si_(5) compound,an obvious magnetic hysteresis and thermal hysteresis were observed at low field below 6 K,possibly due to spin-glass *** the field change of 0 T–5 T,the maximum values of magnetic entropy change(-△S_(M)^(max))reach as high as 15.6 J/kg·K and 15.7 J/kg·K for Er_(55)Co_(30)Al_(10)Si_(5) and Tm_(55)Co_(30)Al_(10)Si_(5) compounds,corresponding refrigerant capacity(RC)values are estimated as 303 J/kg and 189 J/kg,*** large MCE makes amorphous RE_(55)Co_(30)Al_(10)Si_(5)(RE=Er and Tm)alloys become very attractive magnetic refrigeration materials in the low-temperature region.

关键词： magnetocaloric effect amorphous magnetic refrigeration magnetic property

An Empirical Study of China＇s Energy- Intensive Industries＇ Growth Based on Environmental Total Factor Productivity

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China Economist 2012年第2期7卷 37-49页

作者： Shen Keting gong jianjian School of Economics Zhejiang Gongshang UniversityHangzhouChina Center for Studies of Modern Business Zhejiang Gongshang UniversityHangzhouChina

Using directional distance function and nonparametric data envelopment analys＆, th＆ paper estimates the environmental total factor productivity （ETFP） of energy-intensive industries in China from 1995 to 2010, and performs an empirical analysis on factors affecting ETFP growth after studying the differences of energy-intensive industries ＇ ETFP by industries and provinces. The findings include the following： energy-intensive industries ＇ETFP growth is mainly driven by technical progress; China, at its current development stage, still has the potential to raise the productivity of its energy- intensive industries. By estimating the provincial data, we find that the ETFP growth of different provinces converge at different levels. Further market liberalization, increased FDl flows and reductions in energy intensity will help to improve each province＇s ETFP growth. In addition, increasing investment in energy saving and emissions reduction and improving corporate environmental management capacity can help to reduce a company＇s short-term cost of complying with environmental regulations.

关键词： energy-intensive industries environmental pollution environmental total factorproductivity (TEFP) directional distance functionJEL: D24 047 Q55

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军工产业:军民融合发展模式探讨

开放导报 2017年第4期 109-112页

作者：龚健健中国电子科技集团发展战略研究中心北京100041

本文以我国军工产业军民融合现状为切入点,论述了当前军工产业军民融合具有复合式业务体系、计划经济与市场经济双重性发展、技术创新和产业变革匹配等方面的突出特征和问题,提出在优化产业结构、加强科技创新、产权模式保障、区域布局... 详细信息

本文以我国军工产业军民融合现状为切入点,论述了当前军工产业军民融合具有复合式业务体系、计划经济与市场经济双重性发展、技术创新和产业变革匹配等方面的突出特征和问题,提出在优化产业结构、加强科技创新、产权模式保障、区域布局优化和组织架构重构五个方面构建军民深度融合的发展模式,并从国家层面对未来推动军民融合深度发展提出对策建议。

关键词：军民融合发展模式军工产业

Biomaterials-based anti-inflammatory treatment strategies for Alzheimer's disease

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Neural Regeneration Research 2024年第1期19卷 100-115页

作者： jianjian Chu Weicong Zhang Yan Liu Baofeng gong Wenbo Ji Tong Yin Chao Gao Danqi Liangwen Mengqi Hao Cuimin Chen Jianhua Zhuang Jie Gao You Yin Department of Neurology Second Affiliated Hospital(Shanghai Changzheng Hospital)of Naval Medical UniversityShanghaiChina School of Pharmacy University College LondonLondonUK Department of Clinical Pharmacy Xinhua HospitalShanghai Jiao Tong University School of MedicineClinical Pharmacy Innovation InstituteShanghai Jiao Tong University School of MedicineShanghaiChina School of Health Science and Engineering University of Shanghai for Science and TechnologyShanghaiChina Changhai Clinical Research Unit Shanghai Changhai HospitalNaval Medical UniversityShanghaiChina

The current therapeutic drugs for Alzheimer's disease only improve symptoms,they do not delay disease *** re,there is an urgent need for new effective *** underlying pathogenic factors of Alzheimer's disease are not clear,but neuroinflammation can link various hypotheses of Alzheimer's disease;hence,targeting neuroinflammation may be a new hope for Alzheimer's disease *** inflammation can restore neuronal function,promote neuro regeneration,reduce the pathological burden of Alzheimer's disease,and improve or even reverse symptoms of Alzheimer's *** review focuses on the relationship between inflammation and various pathological hypotheses of Alzheimer's disease;reports the mechanisms and characteristics of small-molecule drugs(e.g.,nonsteroidal anti-inflammatory drugs,neurosteroids,and plant extracts);macromolecule drugs(e.g.,peptides,proteins,and gene therapeutics);and nanocarriers(e.g.,lipid-based nanoparticles,polymeric nanoparticles,nanoemulsions,and inorganic nanoparticles)in the treatment of Alzheimer's *** review also makes recommendations for the prospective development of anti-inflammatory strategies based on nanocarriers for the treatment of Alzheimer's disease.

关键词： Alzheimer's disease anti-inflammation blood-brain barrier drug delivery microglia nanoparticles neuroinflammation plant extracts

基于FAST织物风格仪的防水织物服用性能研究

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毛纺科技 2020年第8期48卷 90-95页

作者：宫简简赵杰文夏鑫新疆大学纺织与服装学院新疆乌鲁木齐830046

采用FAST织物风格仪测试聚氨酯PU/聚偏氟乙烯PVDF、聚氨酯PU/含氟聚氨酯FPU、聚氨酯PU/氟橡胶FPM 3个系列的纳米复合防水织物在低负荷作用下的压缩、弯曲和拉伸等性能,并利用SPSS软件进行数据分析,得到了影响防水织物性能的5个主因子:... 详细信息

采用FAST织物风格仪测试聚氨酯PU/聚偏氟乙烯PVDF、聚氨酯PU/含氟聚氨酯FPU、聚氨酯PU/氟橡胶FPM 3个系列的纳米复合防水织物在低负荷作用下的压缩、弯曲和拉伸等性能,并利用SPSS软件进行数据分析,得到了影响防水织物性能的5个主因子:拉伸因子、硬度因子、纬向成形因子、丰满因子和经向弯曲因子,可涵盖原始17项指标的92.738%。建立5个主因子与服用性能之间的关系式,并结合其防水性能,计算出功能性与服用性的综合得分,可为开发穿着舒适的功能性防水织物提供理论基础。

关键词： FAST织物风格仪防水性服用性能主因子分析