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CNKI为你找到相关结果

橡胶树无性系不同季节胶乳生理参数的变化研究  CNKI文献

以99个开割的魏克汉橡胶树无性系为研究对象,测定年均刀次胶乳产量以及雨季前后胶乳中的无机磷、硫醇、蔗糖、干胶、总固形物含量,结合年初胸径围进行相关性分析。结果表明:硫醇、蔗糖含量7月<5月<11月,5、7月份...

杨湉 邱彦芬... 《西南林业大学学报(自然科学)》 2021年04期 期刊

关键词: 橡胶树 / 无性系 / 胶乳 / 生理参数

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融合可见光无人机与哨兵2A影像的森林火灾迹地精细化提取  CNKI文献

以2020年4月昆明市宜良县马街镇兴隆村森林火灾为研究对象,基于无人机的R、G、B3个波段与哨兵2A多光谱影像,分别采用格莱姆-施密特与主成分光谱锐化融合方法进行影像融合,应用6种定量评价指标分别对融合结果进行评估。...

熊源 徐伟恒... 《西南林业大学学报(自然科学)》 2021年04期 期刊

关键词: 无人机 / 哨兵2号 / 影像融合 / 森林火灾

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Guide for Authors  CNKI文献

The Journal of Rare Earths published monthly is a unique international scientific journal which publishes original high-quality works on various aspects of basic theory and applied ...

《Journal of Rare Earths》 2021年07期 期刊

关键词: Guide / for / Authors

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A potential red-emitting phosphor Ca_2YTaO_6:Eu~(3+):L...  CNKI文献

A novel red-emitting phosphor tantalate Ca_2 YTaO_6:Eu~(3+)was synthesized by a solid-state reaction.The purity and surface morphology of the phosphors were characterized.The ...

Ka Ding Siru A... 《Journal of Rare Earths》 2021年07期 期刊

关键词: Luminescence / Tantalate / Ca_2YTaO_6 / Eu~(3+)

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Sensitizing effect of Nd~(3+) on Tb~(3+) activated ZrP...  CNKI文献

The long persistent phosphors of Zr_(0.97)P_2 O_7:0.018 Tb~(3+),0.012 Nd3+with Nd~(3+)as sensitized ions and Tb~(3+)as emission centers were synthesized using high temperature solid...

Meihua Wu Wen Chen... 《Journal of Rare Earths》 2021年07期 期刊

关键词: ZrP_2O_7 / Tb~(3+) / Nd~(3+) / Sensitizer

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Emission enhancement and color modulation of Tm(...  CNKI文献

The multilayered structure thin films(Gd_2(MoO_4)_3:Ho(Tm)/Yb@Gd_2(MoO_4)_3:Yb)) were prepared through sol-gel and spin-coating method,while the average thinness was nearly 140 nm.W...

Liang Li Fei Xing... 《Journal of Rare Earths》 2021年07期 期刊

关键词: Emission / enhancement / Multilayered-layer / structured

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High photocatalytic activity over starfish-like ...  CNKI文献

In this work,the unique starlike La-doped ZnO-SiO2 photocatalysts were constructed by an evaporation and calcination method and characterized in detail.UV-vis reflectanc...

Shuo Wang Zhenke Chen... 《Journal of Rare Earths》 2021年07期 期刊

关键词: ZnO / Lanthanum / doping / Photocatalyst

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Traversing the advantageous role of samarium dop...  CNKI文献

The present work reportes the pertinence of samarium(Sm) doped spinel nanoferrites as magnetically recoverable photocatalyst for the removal of organic pollutants from wastewater.Th...

Sneha Singh Paramdeep Kaur... 《Journal of Rare Earths》 2021年07期 期刊

关键词: Samarium / doped / nanoferrites / Sol-gel

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Mechanism of CeO_2 synthesized by thermal decompositio...  CNKI文献

In this paper,the formation mechanism of mesoporous CeO_2 synthesized by thermal decomposition of Ce-MOF and its performance of benzene catalytic combustion,as well as the str...

Jie Zheng Zhuo Wang... 《Journal of Rare Earths》 2021年07期 期刊

关键词: Thermal / decomposition / Ce-MOF / Mechanism

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Possible negative influences of increasing content of ...  CNKI文献

The activity and hydrothermal stability of the Rh/Ce_xZr_(1-x)O_2(x=0,0.05,0.3,0.5) model three-way catalysts for gasoline vehicle emissions control were investigated in this ...

Tianming Huang Meiqing Shen... 《Journal of Rare Earths》 2021年07期 期刊

关键词: Rh / catalysts / CeO_2-ZrO_2 / Emission

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Low-temperature NH_3-SCR of NO_x over MnCeO_x/TiO_2 ca...  CNKI文献

A series of TiO_2-Al_2 O_3 composites with Al/Ti molar ratios of 0.1,0.2,and 0.4 were synthesized by a coprecipitation method and used as supports to prepare supported MnCeO_x catalysts b...

Gang Li Dongsen Mao... 《Journal of Rare Earths》 2021年07期 期刊

关键词: Low-temperature / NH_3-SCR / MnCeO_x/TiO_2 / catalyst

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Catalytic decomposition of ethyl acetate over La-modif...  CNKI文献

The La-modified Cu-Mn spinel oxide was successfully coated onto honeycomb ceramic by a washcoating method for complete catalytic decomposition of ethyl acetate.The La-modified Cu-Mn oxide...

Rui Xiao Ruixiang Qin... 《Journal of Rare Earths》 2021年07期 期刊

关键词: Coprecipitation / Rare / earth / modified

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Solid-state preparation of mesoporous Ce-Mn-Co ternary...  CNKI文献

Mesoporous Ce-Mn-Co ternary metal oxide was fabricated via an efficient oxalate-precursor-based soft reactive grinding route and used to activate H_2 O_2 for advanced oxidation of methylene blu...

Qingwen Wang Wenyong Deng... 《Journal of Rare Earths》 2021年07期 期刊

关键词: Ce-Mn-Co / mixed / Oxide / Methylene

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Effects of Sm-doping on microstructure,magnetic and  CNKI文献

In this paper,polycrystalline samples of Bi_(1-x)Sm_xFeO~3(x=0,0.05,0.1,0.15) were successfully synthesized by sol-gel method.The effects of Sm concentration on the crystal structur...

Chuang Tian Qingrong Yao... 《Journal of Rare Earths》 2021年07期 期刊

关键词: BiFeO_3 / Crystal / structure / Magnetic

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Effects of La_2O_3 addition on microstructure developm...  CNKI文献

The influence of La_2 O_3 inclusion(0-3 wt%) on the micro structure,phase formation and mechanical properties of zirconia toughed alumina(ZTA) added with 5.0 wt% CeO_2 was investiga...

Zhwan Dilshad Ibrahim Sktani Nik Akmar Rejab... 《Journal of Rare Earths》 2021年07期 期刊

关键词: ZTA-CeO_2 / Ceramic / composite / Microstructural

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Behavior of sulfate in preparation of single lig...  CNKI文献

The precipitation of the water-leaching solution of Baotou mixed rare earth(RE) concentrate roasted with sulfuric acid using ammonium bicarbonate for producing RE carbonate produces a mas...

Meng Wang Xiaowei Huang... 《Journal of Rare Earths》 2021年07期 期刊

关键词: Rare / earth / sulfate / Magnesium

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Theoretical elucidation of rare earth extraction an  CNKI文献

Diglycolamides(DGAs) show excellent application prospects for the extraction and separation of rare earth metals from highly radioactive liquid wastes and rare earth ores.The ...

Xiujing Peng Jianhui Su... 《Journal of Rare Earths》 2021年07期 期刊

关键词: Diglycolamide / Extraction / Separation / Rare

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Investigating the use of an ionic liquid for rar...  CNKI文献

Common collectors for rare earth mineral(REM) flotation,which include carboxylates and hydroxamates,face problems such as being non-selective and sensitive to impurity ions.A type of ioni...

R.Li C.Marion... 《Journal of Rare Earths》 2021年07期 期刊

关键词: Ionic / liquid / Rare / earth

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Mechanism of removing ferrum impurity in lanthan...  CNKI文献

Removal feasibility of Fe impurity form La metal by electron beam melting(EBM) was analyzed,the removal mechanism was discussed,and the verification experiments were carried out #~

Siming Pang Wenli Lu... 《Journal of Rare Earths》 2021年07期 期刊

关键词: Lanthanum / metal / Purification / Fe

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Grain refinement of Mg-3Y alloy using Mg-10Al_2Y maste...  CNKI文献

The as-extruded Mg-10 Al_2 Y master alloy was chosen as a novel grain refiner for as-cast Mg-3 Y alloy.Contrast samples of cast Mg-3 Y alloy added with pure Al and Mg-Zr master alloy grai...

Zhongtao Jiang Xiang Meng... 《Journal of Rare Earths》 2021年07期 期刊

关键词: Grain / refinement / Al_2Y / Mg-Y

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