http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Huang Jianan (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Anna Li,Jianan Chen,Guang Xi,Zhu Huang 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.5
A numerical simulation of the internal flow structure of a steam ejector is conducted in a jet refrigeration system. The previous studies widely used traditional performance curves for assessment of ejector performance. However, a critical performance curve which is obtained by connecting each critical point at various generator temperatures has been rarely studied. In this paper, we design a range of primary nozzles with same or different area ratio by varying the nozzle’s throat and exit diameters, and the impact of nozzle geometries on the critical performance curve is mainly explored. Moreover, we proposed a linear fractional fitting function of generator temperature to predict the critical entrainment ratio and compression ratio for different nozzles. It is found that the nozzle throat diameter is a key parameter affecting the ejector performance and shock wave structure, and the hot source may provide some guidance for the adjustment of nozzle size.
-
Chen, Guanliang,Lin, Xiujuan,Li, Jianan,Fisher, John G.,Zhang, Yan,Huang, Shifeng,Cheng, Xin Elsevier 2018 CERAMICS INTERNATIONAL Vol.44 No.13
<P><B>Abstract</B></P> <P>Flexible dielectric composite films are highly desirable materials with potential application in capacitors due to their high energy density and discharged efficiency. However, agglomeration induced by the large surface energy of nanoparticles and their large dielectric losses are unfavorable to the improvement of energy density. Submicron lead zirconate titanate (PZT) particles have shown great potential as filler in achieving a high energy storage capacity because of their excellent dielectric properties and good dispersion. In this work, calcined PZT particles were used to prepare PZT/polyvinylidene fluoride (PVDF) composite films. The results showed that composite films of high quality could be obtained even with high contents of submicron PZT particles. The introduction of PZT particles significantly improved the dielectric performance of composite films compared with that of the pristine PVDF film. The discharged energy density of composite films with 10 vol% PZT particles achieved 6.41 J/cm<SUP>3</SUP> at 250 kV/mm. A high efficiency of 87.25% was obtained at 50 kV/mm. These findings confirm the feasibility of PZT particles as inorganic filler in composite films for energy storage applications.</P>
-
Decentralized Multiple Control for DC Microgrid with Hybrid Energy Storage
Li Xin,Zheng Taoyin,Guo Panfeng,Huang Jianan,Li Xinyu,Xiong Wei 대한전기학회 2023 Journal of Electrical Engineering & Technology Vol.18 No.2
For a microgrid with hybrid energy storage system , unreasonable power distribution, significant voltage deviation and state-of-charge (SOC) violation are major issues. Conventionally, they are achieved by introducing communication into centralized control or distributed control. This paper proposes a decentralized multiple control to enhance the performance of the system. A low-pass filter based on droop control is applied to battery energy storage system (BESS), and a low-pass difference filter based on proportional-integral (PI) voltage regulation is employed for supercapacitor (SC). The cooperation between them realizes power distribution, in which the average power is compensated by BESS and the high-frequency fluctuation is suppressed by SC. Meanwhile, the voltage deviation is diminished through mode re-division. Considering the SOC imbalance of BESSs and SOC violation of SC, current correction and voltage compensation methods based on local information are proposed to optimize the current sharing of BESSs and ensure the availability of SC, respectively. The advantage of voltage compensation is that, the SC is still available in process of SOC recovery. The simulation model is established on the MATLAB/Simulink environment and the feasibility of proposed strategy is verified by simulation analysis in different scenarios.
-
Li Jiahui,Wang Rui,Tesche Christian,Schoepf U. Joseph,Pannell Jonathan T.,He Yi,Huang Rongchong,Chen Yalei,Li Jianan,Song Xiantao 대한영상의학회 2021 Korean Journal of Radiology Vol.22 No.5
Objective: To investigate the feasibility and the accuracy of the coronary CT angiography (CCTA)-derived Registry of Crossboss and Hybrid procedures in France, the Netherlands, Belgium and United Kingdom (RECHARGE) score (RECHARGECCTA) for the prediction of procedural success and 30-minutes guidewire crossing in percutaneous coronary intervention (PCI) for chronic total occlusion (CTO). Materials and Methods: One hundred and twenty-four consecutive patients (mean age, 54 years; 79% male) with 131 CTO lesions who underwent CCTA before catheter angiography (CA) with CTO-PCI were retrospectively enrolled in this study. The RECHARGECCTA scores were calculated and compared with RECHARGECA and other CTA-based prediction scores, including Multicenter CTO Registry of Japan (J-CTO), CT Registry of CTO Revascularisation (CT-RECTOR), and Korean Multicenter CTO CT Registry (KCCT) scores. Results: The procedural success rate of the CTO-PCI procedures was 72%, and 61% of cases achieved the 30-minutes wire crossing. No significant difference was observed between the RECHARGECCTA score and the RECHARGECA score for procedural success (median 2 vs. median 2, p = 0.084). However, the RECHARGECCTA score was higher than the RECHARGECA score for the 30-minutes wire crossing (median 2 vs. median 1.5, p = 0.001). The areas under the curve (AUCs) of the RECHARGECCTA and RECHARGECA scores for predicting procedural success showed no statistical significance (0.718 vs. 0.757, p = 0.655). The sensitivity, specificity, positive predictive value, and the negative predictive value of the RECHARGECCTA scores of ≤ 2 for predictive procedural success were 78%, 60%, 43%, and 87%, respectively. The RECHARGECCTA score showed a discriminative performance that was comparable to those of the other CTA-based prediction scores (AUC = 0.718 vs. 0.665–0.717, all p > 0.05). Conclusion: The non-invasive RECHARGECCTA score performs better than the invasive determination for the prediction of the 30-minutes wire crossing of CTO-PCI. However, the RECHARGECCTA score may not replace other CTA-based prediction scores for predicting CTO-PCI success.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
