RISS 학술연구정보서비스

검색
다국어 입력

http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.

변환된 중국어를 복사하여 사용하시면 됩니다.

예시)
  • 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
  • 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
닫기
    인기검색어 순위 펼치기

    RISS 인기검색어

      검색결과 좁혀 보기

      선택해제
      • 좁혀본 항목 보기순서

        • 원문유무
        • 원문제공처
        • 등재정보
        • 학술지명
        • 주제분류
        • 발행연도
        • 작성언어

      오늘 본 자료

      • 오늘 본 자료가 없습니다.
      더보기
      • 무료
      • 기관 내 무료
      • 유료
      • KCI등재

        Effects of Non-uniform Pollution on the AC Flashover Performance of Suspension Insulators

        Zhang Zhijin,Zhao Jiayao,Wei Donghong,Jiang Xingliang 대한전기학회 2016 Journal of Electrical Engineering & Technology Vol.11 No.4

        The non-uniform distribution of contamination on insulator surface has appreciable effects on flashover voltage, and corresponding researches are valuable for the better selection of outdoor insulation. In this paper, two typical types of porcelain and glass insulators which are widely used in ac lines were taken as the research subjects, and their corrections of AC flashover voltage under nonuniform pollution were studied. Besides, their flashover characteristics under different ratio (T/B) of top to bottom surface salt deposit density (SDD) were investigated, including the analysis of flashover voltage, surface pollution layer conductivity and critical leakage current. Test results gave the modified formulas for predicting flashover voltage of the two samples, which can be directly applied in the transmission line design. Also, the analysis delivered that, the basic reason why the flashover voltage increases with the decrease of T/B, is due to the decrease of equivalent surface conductivity of the whole surface and the decrease of critical leakage current. This research will be of certain value in providing references for outdoor insulation selection, as well as in proposing more information for revealing pollution flashover mechanism.

      • SCIESCOPUSKCI등재

        Effects of Non-uniform Pollution on the AC Flashover Performance of Suspension Insulators

        Zhijin, Zhang,Jiayao, Zhao,Donghong, Wei,Xingliang, Jiang The Korean Institute of Electrical Engineers 2016 Journal of Electrical Engineering & Technology Vol.11 No.4

        The non-uniform distribution of contamination on insulator surface has appreciable effects on flashover voltage, and corresponding researches are valuable for the better selection of outdoor insulation. In this paper, two typical types of porcelain and glass insulators which are widely used in ac lines were taken as the research subjects, and their corrections of AC flashover voltage under non-uniform pollution were studied. Besides, their flashover characteristics under different ratio (T/B) of top to bottom surface salt deposit density (SDD) were investigated, including the analysis of flashover voltage, surface pollution layer conductivity and critical leakage current. Test results gave the modified formulas for predicting flashover voltage of the two samples, which can be directly applied in the transmission line design. Also, the analysis delivered that, the basic reason why the flashover voltage increases with the decrease of T/B, is due to the decrease of equivalent surface conductivity of the whole surface and the decrease of critical leakage current. This research will be of certain value in providing references for outdoor insulation selection, as well as in proposing more information for revealing pollution flashover mechanism.

      • KCI등재

        Dynamic Trust Model Based on Extended Subjective Logic

        ( Tian Junfeng ),( Zhang Jiayao ),( Zhang Peipei ),( Andma Xiaoxue ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.8

        In Jøsang’s trust model, trust evaluation is obtained through operators, but there are problems with the mutuality and asymmetry of trust and the impact of event weight on trust evaluation. Trust evaluation is updated dynamically and continuously with time and the process of interactions, but it has not been reflected in Jøsang’s model. Therefore, final trust evaluation is not accurate, and malicious fraud cannot be prevented effectively. This causes the success rate of interaction to be low. To solve these problems, a new dynamic trust model is proposed based on extended subjective logic (DTM-ESL). In DTM-ESL, the event weight and the mutuality of trust are fully considered, the original one-way trust relationship is extended to a two-way trust relationship, discounting and consensus operators are improved, and trust renewal is designed based on event weight. The viability and effectiveness of this new model are verified by simulation experiments.

      • KCI등재

        A review of the current in-situ fouling control strategies in MBR: Biological versus physicochemical

        Qiang Liu,Jiayao Ren,Yongsheng Lu,Xiaolei Zhang,Felicity A. Roddick,Linhua Fan,Yufei Wang,Huarong Yu,Ping Yao 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.98 No.-

        Fouling in membrane bioreactors (MBR) is a bottleneck problem limiting their application. In-situfouling control strategies have been continuously developed for decades, and can be mainlycategorized as biological and physicochemical approaches. However, the mechanisms and performanceof these methods as well as their application prospects have not been thoroughly discussed andcompared in a systematic manner. This study was aimed at providing a detailed review on the variousin-situ biological and physicochemical methods in terms of fouling control performance, foulingreduction mechanisms and practicability. This involves a comparison of the popular biological controlstrategies including quorum quenching (QQ)) and physicochemical approaches such as NaClObackflushing, hybrid electrochemical MBR and anti-biofouling membrane development, with theanalysis of their potential, existing issues and practicality in full-scale applications. Future work is alsorecommended for developing more sustainable and more widely applicable MBR fouling controlstrategies.

      • KCI등재

        Passive clamping driver circuit for suppressing positive and negative gate crosstalk in GaN HEMTs

        Shiqing Qin,Tong Cao,Feiyu Chen,Yan Gu,Jiayao Ying,Weiying Qian,Naiyan Lu,Xiangyang Zhang,Guofeng Yang 전력전자학회 2024 JOURNAL OF POWER ELECTRONICS Vol.24 No.6

        Gallium nitride (GaN) devices switch faster than silicon devices, making them more vulnerable to significant switching oscillations. To reduce the effect of crosstalk in GaN High Electron Mobility Transistor (GaN HEMT)-based bridges, this paper introduces a passive clamp circuit to restrain gate source voltage oscillations. Utilizing resistive and capacitive diodes, as well as diodes and transistors, a bootstrap driving circuit can be established. This circuit forms a low impedance Miller current path from the driving IC to the GaN device, which decreases the impact of both positive and negative crosstalk. Employing resistive and capacitive diodes, as well as diodes and transistors, a bootstrap driving circuit can be established. This circuit creates a low impedance Miller current path from the driving IC to the GaN device, reducing the effects of the positive and negative crosstalk. This method, which mostly uses passive components, simplifies the circuit design in comparison to other passive gate driver methods. Through dual-pulse testing with a GS661008P, its capacity to suppress positive and negative crosstalk in GaN devices has been confirmed.

      • Case-Control Study of Diet in Patients with Cervical Cancer or Precancerosis in Wufeng, a High Incidence Region in China

        Jia, Yao,Hu, Ting,Hang, Chuan-Ying,Yang, Ru,Li, Xiong,Chen, Zhi-Lan,Mei, Ye-Dong,Zhang, Qing-Hua,Huang, Ke-Cheng,Xiang, Qun-Ying,Pan, Xiu-Yu,Yan, Yu-Ting,Wang, Xiao-Li,Wang, Shao-Shuai,Hang, Zhou,Tang Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.10

        Purpose: To investigate the diet of patients with cervical cancer and precancerosis in the Wufeng area, a high-incidence region in China. Methods: In the case group, 104 patients diagnosed with cervical cancer or cervical intraepithelial neoplasias (CINII/III) were recruited from the Wufeng area. Nine hundred thirty-six healthy women were selected from the same area as the matched controls. A questionnaire, which included questions about general lifestyle conditions, smoking and alcohol status, source of drinking water, green tea intake, and diet in the past year, was presented to all participants. Results: Green tea intake (P=0.022, OR=0.551, 95% CI=0.330-0.919) and vegetable intake (P=0.035, OR=0.896, 95% CI=0.809-0.993) were identified as protective factors against cervical cancer or CINII/III. There was no indication of any associations of other lifestyle factors (smoking status, alcohol status, source of drinking water) or diet (intake of fruit, meat/egg/milk, soybean food, onion/garlic, staple food and pickled food) with cervical cancer. Conclusions: The results suggest that eating more fresh vegetables and drinking more green tea may help to reduce the risk of cervical cancer or CINII/III in people of the Wufeng area.

      연관 검색어 추천

      이 검색어로 많이 본 자료

      활용도 높은 자료

      해외이동버튼