http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Dynamic Thermal Rating of Overhead Transmission Lines Based on GRAPES Numerical Weather Forecast
Hongbo Yan,Yanling Wang,Xiaofeng Zhou,Likai Liang,Zhijun Yin,Wei Wang 한국정보처리학회 2019 Journal of information processing systems Vol.15 No.4
Dynamic thermal rating technology can effectively improve the thermal load capacity of transmission lines. However, its availability is limited by the quantity and high cost of the hardware facilities. This paper proposesa new dynamic thermal rating technology based on global/regional assimilation and prediction system(GRAPES) and geographic information system (GIS). The paper will also explore the method of obtaining anypoint meteorological data along the transmission line by using GRAPES and GIS, and provide the strategy ofextracting and decoding meteorological data. In this paper, the accuracy of numerical weather prediction wasverified from the perspective of time and space. Also, the 750-kV transmission line in Shaanxi Province isconsidered as an example to analyze. The results of the study indicate that dynamic thermal rating based onGRAPES and GIS can fully excavate the line power potential without additional cost on hardware, which savesa lot of investment.
Robustness Improvement for Adaptive Full Order Observer in Sensorless Induction Motor Drives
Hongbo Wang,Wei Sun,Yong Yu,Gaolin Wang,Dianguo. Xu 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
The performance of adaptive full order observer for speed sensorless induction motor drives can be improved further though it has been researched for many years. A novel speed estimation algorithm with estimated rotor flux error and the corresponding feedback gain design method are proposed in this paper. Through Lyapunov’s theorem, the stability of proposed speed estimation algorithm is proved. The sensitivity of speed estimation to motor parameter deviation is reduced. Finally the feasibility of proposed two methods is verified by experiments.
Wang, Jianhua,Ji, Baojian,Wang, Hongbo,Chen, Naifu,You, Jun The Korean Institute of Power Electronics 2015 JOURNAL OF POWER ELECTRONICS Vol.15 No.3
An inherent zero-voltage and zero-current-switching phase-shifted full-bridge converter with reverse-blocking insulated-gate bipolar transistor (IGBT) or non-punch-through IGBT is proposed in this paper. This converter not only ensures that the switches in the lagging leg works at zero-current switching, but also minimizes circulating conduction loss without any additional auxiliary circuits. A 1.2 kW hardware prototype is designed, fabricated, and tested to verify the proposed topology. The control loop design procedures with small-signal models are also presented. A simple, low-cost, and robust democratic current-sharing circuit is also introduced and verified in this study. The proposed converter is a suitable alternative for compact, cost-effective applications with high-voltage input.
An efficient process for co-production of γ-aminobutyric acid and probiotic Bacillus subtilis cells
Hongbo Wang,Jinge Huang,Lei Sun,Fuchao Xu,Wei Zhang,Jixun Zhan 한국식품과학회 2019 Food Science and Biotechnology Vol.28 No.1
This study was to establish an integrated processfor the co-production of c-aminobutyric acid (GABA) andlive probiotics. Six probiotic bacteria were screened andBacillus subtilis ATCC 6051 showed the highest GABAproducingcapacity. The optimal temperature and initial pHvalue for GABA production in B. subtilis were found to be30 C and 8.0, respectively. A variety of carbon andnitrogen sources were tested, and potato starch and peptonewere the preferred carbon and nitrogen sources for GABAproduction, respectively. The concentrations of carbonsource, nitrogen source and substrate (sodium L-glutamate)were then optimized using the response surface methodology. The GABA titer and concentration of viable cells ofB. subtilis reached 19.74 g/L and 6.0 9 108 cfu/mL at120 h. The GABA titer represents the highest production ofGABA in B. subtilis. This work thus demonstrates a highlyefficient co-production process for GABA and probiotic B. subtilis cells.
Altered Protein Expression Patterns of Mycobacterium tuberculosis Induced by ATB107
Hongbo Shen,Enzhuo Yang,Feifei Wang,Ruiliang Jin,Shengfeng Xu,Qiang Huang,Honghai Wang 한국미생물학회 2010 The journal of microbiology Vol.48 No.3
ATB107 is a potent inhibitor of indole-3-glycerol phosphate synthase (IGPS). It can effectively inhibit the growth of clinical isolates of drug-resistant Mycobacterium tuberculosis strains as well as M. tuberculosis H37Rv. To investigate the mechanism of ATB107 action in M. tuberculosis, two-dimensional gel electrophoresis coupled with MALDI-TOF-MS analysis (2-DE-MS) was performed to illustrate alterations in the protein expression profile in response to ATB107. Results show that ATB107 affected tryptophan biosynthesis by decreasing the expression of protein encoded by Rv3246c, the transcriptional regulatory protein of MtrA belonging to the MtrA-MtrB two-component regulatory system, in both drug-sensitive and drug-resistant virulent strains. ATB107 might present a stress condition similar to isoniazid (INH) or ethionamide for M. tuberculosis since the altered expression in response to ATB107 of some genes, such as Rv3140, Rv2243, and Rv2428, is consistent with INH or ethionamide treatment. After incubation with ATB107, the expression of 2 proteins encoded by Rv0685 and Rv2624c was down-regulated while that of protein encoded by Rv3140 was up-regulated in all M. tuberculosis strains used in this study. This may be the common response to tryptophan absence; however, relations to ATB107 are unknown and further evaluation is warranted.
Jianhua Wang,Baojian Ji,Hongbo Wang,Naifu Chen,Jun You 전력전자학회 2015 JOURNAL OF POWER ELECTRONICS Vol.15 No.3
An inherent zero-voltage and zero-current-switching phase-shifted full-bridge converter with reverse-blocking insulated-gate bipolar transistor (IGBT) or non-punch-through IGBT is proposed in this paper. This converter not only ensures that the switches in the lagging leg works at zero-current switching, but also minimizes circulating conduction loss without any additional auxiliary circuits. A 1.2 kW hardware prototype is designed, fabricated, and tested to verify the proposed topology. The control loop design procedures with small-signal models are also presented. A simple, low-cost, and robust democratic current-sharing circuit is also introduced and verified in this study. The proposed converter is a suitable alternative for compact, cost-effective applications with high-voltage input.
Bo Wang,Hongbo Wang,Yong Yu,Xin Lv,Gaolin Wang,Dianguo Xu 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
Nowadays, speed sensorless induction motor drives have been widely used in industrial applications. To improve the dynamic performance of the current loop, a sensorless robust predictive current controller combined with a speed adaptive full-order observer is presented in the paper. Based on the mathematical model of induction motor in discrete domain, the proposed controller is designed to replace the traditional PI controller. Compared with the PI control and traditional deadbeat predictive current control, the proposed method can significantly enhance the robustness of current feedback control. Meanwhile, a speed adaptive full-order observer is designed to obtain the motor rotor speed for the control scheme. The effectiveness of the proposed algorithm has been verified experimentally via a 3.7 kW electric drive system.
Feng Wang,Xiaowei Wang,Hongbo Chen,Jianzhu Liu,Ziqiang Cheng 대한수의학회 2011 JOURNAL OF VETERINARY SCIENCE Vol.12 No.3
The critical time of avian leukosis virus subgroup J (ALV-J)-mediated immunosuppression was determined by body weight, relative immune organ weight, histopathology, and presence of group specific antigen and antibodies in specific pathogen-free (SPF) chickens. CD4^+ and CD8^+ cell activity in the spleen, total and differential leukocyte counts in blood, and viral RNA levels in spleen were measured. Significant growth suppression was observed in the two ALV-J-infected groups. A strong immune response by infected groups was present in spleen at 2-weeks-of-age, but after 4-weeks-of-age, the response decreased quickly. The thymus and bursa showed persistent immunosuppression until 4-weeks-of-age. Proliferation of fibroblasts and dendritic cells were observed in immune organs at 4- and 5-weeks-of-age. However, the granulocyte cell number was markedly lower in the infected groups than in the control group. In group 1 (day 1 infection) CD4^+ cells increased during the second week but significantly decreased during the fourth week, while group 2 (day 7 infection) showed the opposite effect. Viral RNA increased significantly by the fourth week. These data identify 3∼4 weeks post-infection as the key time at which the ALV-J virus exerts its immunosuppressive effects on the host.
Dynamic Thermal Rating of Overhead Transmission Lines Based on GRAPES Numerical Weather Forecast
Yan, Hongbo,Wang, Yanling,Zhou, Xiaofeng,Liang, Likai,Yin, Zhijun,Wang, Wei Korea Information Processing Society 2019 Journal of information processing systems Vol.15 No.4
Dynamic thermal rating technology can effectively improve the thermal load capacity of transmission lines. However, its availability is limited by the quantity and high cost of the hardware facilities. This paper proposes a new dynamic thermal rating technology based on global/regional assimilation and prediction system (GRAPES) and geographic information system (GIS). The paper will also explore the method of obtaining any point meteorological data along the transmission line by using GRAPES and GIS, and provide the strategy of extracting and decoding meteorological data. In this paper, the accuracy of numerical weather prediction was verified from the perspective of time and space. Also, the 750-kV transmission line in Shaanxi Province is considered as an example to analyze. The results of the study indicate that dynamic thermal rating based on GRAPES and GIS can fully excavate the line power potential without additional cost on hardware, which saves a lot of investment.