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| 1 | Improvement of Coercivity and Corrosion Resistance of Nd-Fe-B Sintered Magnets with Cu Nano-particles Doping显示文摘Nd-Fe-B permanent magnets with a small amount of Cu nano-particles doping have been prepared by conventional sintered method.Effects of Cu content on magnetic properties,corrosion resistance,and oxidation properties of the magnets have been studied.It shows that the coercivity rises gradually,while the remanence decreases simultaneously with increasing Cu doping amount.Microstructure observation reveals that Cu element enriches mainly the Nd-rich phase.Autoclave test results show that the corrosion rate of the magnets decreases with increasing Cu content.After oxidation,the maximum energy product loss of the magnets with 0 and 0.2 wt% Cu nano-particles doping are 6.13% and 0.99%,respectively.Therefore,it is concluded that Cu nano-particles doping is a promising way to enhance the coercivity and corrosion resistance of sintered Nd-Fe-B magnets. | C.Sun W.Q.Liu H.Sun M.Yue X.F.Yi J.W.Chen | 2012 | Journal of Materials Science & Technology2012，28，10： | 7 |
| 2 | Thinning intensity affects microbial functional diversity and enzymatic activities associated with litter decomposition in a Chinese fir plantation显示文摘Microbial functional diversity and enzymatic activities are critical to maintaining material circulation during litter decomposition in forests.Thinning,an important and widely used silvicultural treatment,changes the microclimate and promotes forest renewal.However,how thinning affects microbial functional diversity and enzymatic activities during litter decomposition remains poorly understood.We conducted thinning treatments in a Chinese fir plantation in a subtropical region of China with four levels of tree stem removal(0,30,50,and 70%),each with three replicates,and the effects of thinning on microbial functional diversity and enzymatic activities were studied 7 years after treatment by collecting litter samples four times over a 1-year period.Microbial functional diversity and enzymatic activities were analyzed using Biolog Ecoplates(Biolog Inc.,Hayward,CA,USA)based on the utilization of 31 carbon substrates.Total microbial abundance during litter decomposition was lower after the thinning treatments than without thinning.Microbial functional diversity did not differ significantly during litter decomposition,but the types of microbial carbon-source utilization did differ significantly with the thinning treatments.Microbial cellulase and invertase activities during litter decomposition were significantly higher under the thinning treatments due to changes in the litter carbon concentration and the ratios of carbon and lignin to nitrogen.The present study demonstrated the important influence of thinning on microbial activities during litter decomposition.Moderate-intensity thinning may maximize vegetation diversity and,in turn,increase the available substrate sources for microbial organisms in litter and promote nutrient cycling in forest ecosystems. | Wenya Xiao Fei Fei Jiaojiao Diao Bin J.W.Chen Qingwei Guan | 2018 | Journal of Forestry Research2018，29，5： | 6 |
| 3 | 培植企业自我更新力——以迪欧咖啡为例显示文摘本文采用案例研究方法考察一家中国企业如何在快速变化的经济环境中进行自我更新能力的发展过程。通过对定量数据的归纳,将企业自我更新能力的发展过程概念化为四个过程:1.战略形成过程(开始阶段);2.试错学习过程(发展阶段);3.广泛执行过程(成熟阶段);4.调整更新过程(进化阶段)。本文希望通探究、揭示复杂环境中组织能力形成和发展的机制,对现有的理论进行补充。 | 梁晓雅 Adela J.W.Chen 张诚 潘善林 | 2015 | 企业研究2015，，10： | 0 |
| 4 | Sample selection for models to represent ceramic cores fabricated by stereolithography three-dimensional printing显示文摘Ceramic cores with good chemical stability and moderate mechanical properties near casting temperatures of 1550℃ for example are used for the manufacturing of internal structures of hollow blades,requiring complex structures and high precision[1–3].However,traditional preparation method based on investment casting is tedious,requiring not only long production cycles but also high cost[4]. | X.L.An J.J.Liang J.G.Li J.W.Chen Y.Z.Zhou X.F.Sun | 2022 | Journal of Materials Science & Technology2022，，26： | 0 |
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