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RISS 인기검색어
- 검색키워드
- 저자 : Yanting Hu (검색결과 4 건)
- 무료
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The potential of Panax notoginseng against COVID-19 infection
Yeye Hu,Ziliang He,Wei Zhang,Zhiqiang Niu,Yanting Wang,Ji Zhang,Ting Shen,Hong Cheng,Weicheng Hu 고려인삼학회 2023 Journal of Ginseng Research Vol.47 No.5
The COVID-19 pandemic has changed the world and has presented the scientific community with unprecedentedchallenges. Infection is associated with overproduction of proinflammatory cytokines secondaryto hyperactivation of the innate immune response, inducing a cytokine storm and triggeringmultiorgan failure and significant morbidity/mortality. No specific treatment is yet available. For thousandsof years, Panax notoginseng has been used to treat various infectious diseases. Experimental evidenceof P. notoginseng utility in terms of alleviating the cytokine storm, especially the cascade, andimproving post-COVID-19 symptoms, suggests that P. notoginseng may serve as a valuable adjuncttreatment for COVID-19 infection.
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Enhanced Thermal Conductivity of BN/SR Composites via Biomass‑Modifcation of BN
Yanting Zhang,Cheng Cai,Tao Chen,Chonggang Wu,Xinghou Gong,Jiang Hong,Tao Hu 대한금속·재료학회 2023 ELECTRONIC MATERIALS LETTERS Vol.19 No.2
As microelectronics technology advances and develops, issues such as heat management and reliability of electronic componentswill become more exposed. Here, this paper explored a green biomass modification method for preparing compositeswith both good thermal conductivity and dielectric properties. Namely, boron nitride (BN) was first surface coated with thecopolymerization product of tea polyphenols and theophylline, both of which can be extracted from tea leaves. Then, throughsolution blending the coated-BN (BN@TPP) with silicone rubber (SR), the BN@TPP/SR composites were obtained. Owingprobably to the coated layer, BN@TPP were more evenly dispersed within the SR matrix, which effectively reduced theinterfacial thermal resistance and improved the thermal conductivity of composites. The thermal diffusion coefficient andthermal conductivity of 40 wt% BN@TPP/SR composites reached 0.216 mm2/s and 0.462 W/mK, which are higher thanBN/SR composites (0.155 mm2/s, 0.349 W/mK), respectively. Meanwhile, the 40 wt% BN@TPP/SR composite maintaineddielectric constant (3.9 at 1 kHz) and low dielectric loss (0.005 at 1 kHz). In conclusion, this green biomass modificationmethod not only provides a simple and environmentally friendly modification method for BN, but also offers a novel ideathat can be applied to the practical preparation of thermally conductive materials for electronic devices.
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Impedance Interaction Modeling and Analysis for Bidirectional Cascaded Converters
Yanjun Tian,Fujin Deng,Zhe Chen,Xiaofeng Sun,Yanting Hu 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
For the cascaded converter system, the output impedance of source converter interacts with the input impedance of load converter, and the interaction may cause the system instability. In bidirectional applications, when the power flow is reversed, the impedance interaction also varies, which brings more uncertainty to the system stability. An investigation is performed here for showing that the forward and reverse interactions are prominently different in terms of dynamics and stability even though the cascaded converter control remains unchanged. An important guideline has been drawn for the control of the cascaded converter. That is when voltage mode converter working as the load converter; the constant power mode converter as the source converter, the system is more stable. The concluded findings have been verified by simulation and experimental results.
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Impedance Coordinative Control for Cascaded Converter in Bidirectional Application
Yanjun Tian,Fujin Deng,Zhe Chen,Xiaofeng Sun,Yanting Hu 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
Two stage cascaded converters are widely used in bidirectional applications, but the negative impedance may cause system instability. Actually the impedance interaction is much different between forward power flow and reversed power flow, which will introduce more uncertainty to the system stability. This paper proposes a control method for the constant power controlled converter in cascaded system, and consequently it can change the negative impedance of constant power converter into resistive impedance, which will improve the cascaded system stability, as well as merge the impedance difference between forward and reversed power flow. This paper addresses the analysis with the topology of cascaded dualactive - bridge converter (DAB) with inverter, and the proposed control method can also be implemented in unidirectional applications and other general cascaded converter system. The effectiveness has been validated by both simulation and experimental results.
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