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 : Yang Qichao (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Underwater contactless wet‑mateable connector using bowl‑shaped coils
Qichao Zhao,Tianlei Wang,Hui Zhi,Xin Wu,Yurui Zhang,Canjun Yang,Yanhu Chen 전력전자학회 2022 JOURNAL OF POWER ELECTRONICS Vol.22 No.7
Wet-mateable connectors enabling power and communication for underwater equipment are greatly favored for underwater systems. However, conventional underwater wet-mateable connectors with electrical contact conductors have the features of high cost, limited mate/de-mate times, and high risk of ground faults when being applied underwater, which limits their used. In this paper, a contactless underwater wet-mateable connector with bowl-shaped couplers was proposed, and an equivalent circuit for inductive power transmission was modeled and analyzed. Then the mathematical expression of the magnetic induction intensity of the bowl-shaped coil was derived. The parameters including co , zco , and s0 of the coil were analyzed and optimized to attain better performance and lower cost. A prototype was built and tested. Results showed that it can transmit power up to 1125 W with an efficiency of 85%. In addition, it can achieve a data rate up to 6 MB/s under a water pressure of 20 MPa.
-
Sun Qichao,Yang Zhensheng,Wang Zhiying,Wu Lianying 한국화학공학회 2024 Korean Journal of Chemical Engineering Vol.41 No.7
Superhydrophobic microporous membranes have great application prospects in oil–water separation. The stability of microrough structures on the surface of hydrophobic membranes is a challenge in the oil–water separation process. In this regard, it is crucial to develop a simple method to prepare stable superhydrophobic membranes. This article prepared superhydrophobic polyvinylidene fl uoride (PVDF) membranes, employing a combination of thermally induced phase separation (TIPS) with rolling embossing. The gel state of the membrane surface is the key core for the success of the process, for which the eff ect of pre-evaporation time on the membrane properties was explored. A turning point in the gel curve occurred at a preevaporation time of 1.5 min, when the gel state of the membrane was most suitable for rolling. The surface of the embossed membrane shows a micron–submicron hierarchical structure reminiscent of the lotus leaf surface, and the surface of the membrane presents a water contact angle of 151° and a solid contact angle of 9.5°. The micrometer submicron hierarchical structure exhibits excellent mechanical stability in friction experiments, with a water contact angle only reduced by 7.9° after 50 sandpaper frictions. Cross-fl ow fi ltration was signifi cantly superior to dead-end fi ltration in oil–water separation, the embossed membrane maintained a high fl ux of 1234 L•m −2 •h −1 and a retention rate (α) of 99.10%. Meanwhile, the embossed membrane can remove 100% of mechanical impurities and water from waste diesel fuel. This study provides certain ideas and methods for the preparation of superhydrophobic microporous membranes.
-
Zhang Jing,Shen Xin,Yang Chongguang,Chen Yue,Guo Juntao,Wang Decheng,Zhang Jun,Lynn Henry,Hu Yi,Pan Qichao,Zhang Zhijie 한국역학회 2022 Epidemiology and Health Vol.44 No.-
OBJECTIVES: Tuberculosis (TB) treatment outcomes are a key indicator in the assessment of TB control programs. We aimed to identify spatial factors associated with TB treatment outcomes, and to provide additional insights into TB control from a geographical perspective.METHODS: We collected data from the electronic TB surveillance system in Shanghai, China and included pulmonary TB patients registered from January 1, 2009 to December 31, 2016. We examined the associations of physical accessibility to hospitals, an autoregression term, and random hospital effects with treatment outcomes in logistic regression models after adjusting for demographic, clinical, and treatment factors.RESULTS: Of the 53,475 pulmonary TB patients, 49,002 (91.6%) had successful treatment outcomes. The success rate increased from 89.3% in 2009 to 94.4% in 2016. The successful treatment outcome rate varied among hospitals from 78.6% to 97.8%, and there were 12 spatial clusters of poor treatment outcomes during the 8-year study period. The best-fit model incorporated spatial factors. Both the random hospital effects and autoregression terms had significant impacts on TB treatment outcomes, ranking 6th and 10th, respectively, in terms of statistical importance among 14 factors. The number of bus stations around the home was the least important variable in the model.CONCLUSIONS: Spatial autocorrelation and hospital effects were associated with TB treatment outcomes in Shanghai. In highly-integrated cities like Shanghai, physical accessibility was not related to treatment outcomes. Governments need to pay more attention to the mobility of patients and different success rates of treatment among hospitals.
-
Effects of inlet working condition and heat load on supercritical CO2 compressor performance
Pei Jinze,Zhao Yuanyang,Zhao Mingran,Liu Guangbin,Yang Qichao,Li Liansheng 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.8
The supercritical carbon dioxide (sCO2) Brayton power cycle is more effective than the conventional power cycle and is more widely applicable to heat sources. The inlet working conditions of the compressor have a higher influence on their operating performance because the thermophysical properties of the CO2 vary dramatically close to the critical point. The flow in the sCO2 compressor is simulated and the compressor performance is analyzed. The results show that the sCO2 centrifugal compressor operates outside of its intended parameters due to the change in inlet temperature. The sCO2 compressor requires more power as the inlet temperature increases. The compressor power is 582 kW when the inlet temperature is at 304 K. But the power is doubled when the inlet temperature increases to 314 K, and the change in the isentropic efficiency is within 5%. The increase in the inlet temperature significantly reduces the risk of condensation in centrifugal compressors. When the heat load of the sCO2 power system changes, the inlet pressure to the turbine can be kept constant by regulating the rotational speed of compressors. With the increase in rotational speed, the incidence loss and condensation risk increase
스콜라연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
