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在托卡马克装置杂散磁场下未中性化离子偏转轨道的计算与分析
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作者 王惠三 《核聚变与等离子体物理》 CAS CSCD 北大核心 1992年第1期53-57,共5页
本文给出了在托卡马克装置杂散磁场下中性束注入器内未中性化离子偏转轨道的计算结果,并分析了在装置的中性束注入器上实现的可能性。
关键词 中性束注入 中性化器 杂散磁场
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Synthesis of mesoporous carbon as electrode material for supercapacitor by modified template method 被引量:3
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作者 赵家昌 赖春艳 +1 位作者 戴扬 解晶莹 《Journal of Central South University of Technology》 EI 2005年第6期647-652,共6页
The pore structures and electrochemical performances of mesoporous carbons prepared by silica sol template method as electrode material for supercapacitor were investigated. The mean pore size and mass specific capaci... The pore structures and electrochemical performances of mesoporous carbons prepared by silica sol template method as electrode material for supercapacitor were investigated. The mean pore size and mass specific capacitance of the mesoporous carbons increase with the increase of mass ratio of silica sol to carbon source (glucose). A modified template method, combining silica sol template method and ZnCl2 chemical activation method, was proposed to improve the mass specific capacitance of the mesoporous carbon with an improved BET surface area. The correlation of rate capability and pore structure was studied by constant current discharge and electrochemical impedance spectroscopy. A commercially available microporous carbon was used for comparison. The result shows that mesoporous carbon with a larger pore size displays a higher rate capability. Mesoporous carbon synthesized by modified template method has both high mass specific capacitance and good rate capability. 展开更多
关键词 SUPERCAPACITOR mesoporous carbon modified template method electrochemical performance SYNTHESIS
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Perspectives in application of biosensors for the modernization of traditional Chinese medicine
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作者 Qiang Chen Hong-Cai Shang +1 位作者 Bing-Kai Han Jun Jiao 《TMR Modern Herbal Medicine》 2018年第1期39-46,共8页
Biosensor is an instrument which is sensitive to biological material and converts its concentration into electrical signals.Organisms such as enzymes, antibodies, tissues, cells and so on can selectively identify spec... Biosensor is an instrument which is sensitive to biological material and converts its concentration into electrical signals.Organisms such as enzymes, antibodies, tissues, cells and so on can selectively identify specific substances. Thesemolecular recognition functions can be combined with the target, such as the binding of antibodies and antigens, and thebinding of enzymes to the substrate through the recognition process. Biosensor has the advantages of high specificity,high sensitivity, fast reaction speed, low cost and easy operation. It has wide application prospect in food, pharmacy,chemical industry, clinical examination, biomedicine, environmental monitoring and so on, especially as a newtechnology means, in the field of modern herbal medicine research influence. Studies have demonstrated that thebiosensing technology has been applied to, traditional Chinese medicine (TCM) targets, isolation and purification ofTCM, the mechanism of TCM, quality control of TCM, the active ingredients detection of TCM and other basicresearches. Biosensor technology has made an important contribution to the research of modern herbal medicine, and hasbecome a Hot-spot in future research. 展开更多
关键词 BIOSENSOR Traditional Chinese medicine PURIFICATION Active compound identification MECHANISM Qualitycontrol
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Mapping high resolution National Soil Information Grids of China 被引量:37
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作者 Feng Liu Huayong Wu +6 位作者 Yuguo Zhao Decheng Li Jin-Ling Yang Xiaodong Song Zhou Shi A-Xing Zhu Gan-Lin Zhang 《Science Bulletin》 SCIE EI CSCD 2022年第3期328-340,共13页
Soil spatial information has traditionally been presented as polygon maps at coarse scales. Solving global and local issues, including food security, water regulation, land degradation, and climate change requires hig... Soil spatial information has traditionally been presented as polygon maps at coarse scales. Solving global and local issues, including food security, water regulation, land degradation, and climate change requires higher quality, more consistent and detailed soil information. Accurate prediction of soil variation over large and complex areas with limited samples remains a challenge, which is especially significant for China due to its vast land area which contains the most diverse soil landscapes in the world. Here, we integrated predictive soil mapping paradigm with adaptive depth function fitting, state-of-the-art ensemble machine learning and high-resolution soil-forming environment characterization in a highperformance parallel computing environment to generate 90-m resolution national gridded maps of nine soil properties(pH, organic carbon, nitrogen, phosphorus, potassium, cation exchange capacity, bulk density, coarse fragments, and thickness) at multiple depths across China. This was based on approximately5000 representative soil profiles collected in a recent national soil survey and a suite of detailed covariates to characterize soil-forming environments. The predictive accuracy ranged from very good to moderate(Model Efficiency Coefficients from 0.71 to 0.36) at 0–5 cm. The predictive accuracy for most soil properties declined with depth. Compared with previous soil maps, we achieved significantly more detailed and accurate predictions which could well represent soil variations across the territory and are a significant contribution to the GlobalSoilMap.net project. The relative importance of soil-forming factors in the predictions varied by specific soil property and depth, suggesting the complexity and non-stationarity of comprehensive multi-factor interactions in the process of soil development. 展开更多
关键词 Predictive soil mapping Soil-landscape model Machine learning Depth function Large and complex areas Soil spatial variation
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