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Ji-Ying Shi,Deng-Yu Zhang,Fei Xue,Ya-Jing Li,Wen Qiao,Wen-Jing Yang,Yi-Ming Xu,Ting Yang 전력전자학회 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.5
This paper presents a moth-flame optimization (MFO)-based maximum power point tracking (MPPT) method for photovoltaic (PV) systems. The MFO algorithm is a new optimization method that exhibits satisfactory performance in terms of exploration, exploitation, local optima avoidance, and convergence. Therefore, the MFO algorithm is quite suitable for solving multiple peaks of PV systems under partial shading conditions (PSCs). The proposed MFO-MPPT is compared with four MPPT algorithms, namely the perturb and observe (P&O)-MPPT, incremental conductance (INC)-MPPT, particle swarm optimization (PSO)-MPPT and whale optimization algorithm (WOA)-MPPT. Simulation and experiment results demonstrate that the proposed algorithm can extract the global maximum power point (MPP) with greater tracking speed and accuracy under various conditions.
Shi, Ji-Ying,Zhang, Deng-Yu,Xue, Fei,Li, Ya-Jing,Qiao, Wen,Yang, Wen-Jing,Xu, Yi-Ming,Yang, Ting The Korean Institute of Power Electronics 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.5
This paper presents a moth-flame optimization (MFO)-based maximum power point tracking (MPPT) method for photovoltaic (PV) systems. The MFO algorithm is a new optimization method that exhibits satisfactory performance in terms of exploration, exploitation, local optima avoidance, and convergence. Therefore, the MFO algorithm is quite suitable for solving multiple peaks of PV systems under partial shading conditions (PSCs). The proposed MFO-MPPT is compared with four MPPT algorithms, namely the perturb and observe (P&O)-MPPT, incremental conductance (INC)-MPPT, particle swarm optimization (PSO)-MPPT and whale optimization algorithm (WOA)-MPPT. Simulation and experiment results demonstrate that the proposed algorithm can extract the global maximum power point (MPP) with greater tracking speed and accuracy under various conditions.
Analysis of TRRAP as a Potential Molecular Marker and Therapeutic Target for Breast Cancer
Ji Wang,Ming Shan,Tong Liu,Qingyu Shi,Zhenbin Zhong,Wei Wei,Da Pang 한국유방암학회 2016 Journal of breast cancer Vol.19 No.1
Purpose: This study was designed to assess the protein levels of transformation/transcription domain-associated protein (TRRAP) in invasive ductal breast carcinomas, and investigated the association between TRRAP and the clinicopathological features of breast cancer. Methods: We examined TRRAP protein expression in 470 breast cancer tissues and normal breast tissues by tissue microarray to study the correlation between TRRAP expression and clinicopathological features. This was analyzed using the chi-square test. Kaplan-Meier survival curves and log-rank tests were applied to analyze the survival status. Cox regression was applied for multivariate analysis of prognosis. Results: The data demonstrated that expression of TRRAP was significantly lower in breast carcinomas (36.6%) than in corresponding normal breast tissues (50.8%). In addition, TRRAP protein levels negatively correlated with tumor size, and indicated poor differentiation, increased nodal involvement, and low p53-positive rates. Analysis of survival revealed that lower TRRAP expression correlated with shorter survival time. Univariate analyses identified TRRAP and progesterone receptor as independent protective factors for breast cancer prognosis. However, Ki-67, tumor size, and nodal involvement appeared to be independent risk factors. Conclusion: The findings indicate a significant correlation between TRRAP protein levels and adverse prognosis in breast cancer. Therefore, TRRAP could be a prognostic biomarker for breast cancer. In addition, TRRAP is also a predictive biomarker of breast cancer treatment.
송지성(Ji Sung Song),석진명(Jin Ming Shi) 한국디자인문화학회 2011 한국디자인문화학회지 Vol.17 No.2
예술은 생활에서 나오지만 또 생활을 더욱 고상하고 풍요롭게 해준다. 길상도안은 중국역사 문화전통의 한 가지 예술 표현양식으로서 사람들의 생활, 습관 그리고 문화배경과 매우 밀접한 관계가 있는데, "길상"은 사람들의 축복, 기원, 동경을 비유, 은유적으로 내포하고 있다. 이를 통해 사람들에게 행복과 희망을 주는 것이다. 표현양식은 각종 도형, 표지상의 운용에서 나타난다. 이러한 전통적인 길상도안이 현대의 평면설계에서 독특하고 개성있게 표현되고 있다. 즉, 현대평면설계 창작영감의 중요한 원천인 것이다. 길상도안의 예술매력을 이해하고 파악하는 것은 현대 평면설계를 풍부하고, 다양하게 하는 등 중요한 의미를 지니고 있다. Art originates from life and inturn it is higher than life. As one of the forms art expression in china`s historical and cultural tradition. Auspicious patterns are closely related to people`s life. Customs and cultural background. ``Auspiciousness`` has theimplied meaning of people`s best wishes. Sincere prayings and the longing for betterlife. Which can bring people happiness and hope. Asforits form of expression, we can find the distinct expression in the application of all kinds of patterns andmarks. In the modern place design. it`s unique vitalily has been shown to all. and thus has become the valuable spring of inspiration in modern design. It is of vital significance for people to know and aequire the charm of the auspicious patterns. for people can improve and enrich the cultural system as well as guide the modern art design in doing so.
Lin, Chang-Ming,Ma, Ji-Min,Zhang, Li,Hao, Zong-Yao,Zhou, Jun,Zhou, Zhen-Yu,Shi, Hao-Qiang,Zhang, Yi-Fei,Shao, En-Ming,Liang, Chao-Zhao Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.10
Transient receptor potential melastain 7 (TRPM7) is a bifunctional protein with dual structure of both ion channel and protein kinase, participating in a wide variety of diseases including cancer. Recent researches have reported the mechanism of TRPM7 in human cancers. However, the correlation between TRPM7 and prostate cancer (PCa) has not been well studied. The objective of this study was to investigate the potential the role of TRPM7 in the apoptosis of PC-3 cells, which is the key cell of advanced metastatic PCa. In this study, we demonstrated the influence and potential function of TRPM7 on the PC-3 cells apoptosis induced by TNF-related apoptosis inducing-ligand (TRAIL). The study also found a novel up-regulated expression of TRPM7 in PC-3 cells after treating with TRAIL. Suppression of TRPM7 by TRPM7 non-specific inhibitors ($Gd^{3+}$ or 2-aminoethoxy diphenylborate (2-APB) ) not only markedly eliminated TRPM7 expression level, but also increased the apoptosis of TRAIL-treated PC-3 cells, which may be regulated by the phosphatidylinositol 3-kinase/protein kinase B (PI3K/AKT) signaling pathway accompany with up-regulated expression of cleaved Caspase-3, (TRAIL-receptor 1, death receptors 4) DR4, and (TRAIL-receptor 2, death receptors 5) DR5. Taken together, our findings strongly suggested that TRPM7 was involved in the apoptosis of PC-3 cells induced by TRAIL, indicating that TRPM7 may be applied as a therapeutic target for PCa.
Xi Zeng,Shi-ming Ji,Ming-sheng Jin,Da-peng Tan,Jue-hui Li,Wen-tao Zeng 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.
In order to improve material removal rate of laser hardening workpiece and also make machining tool suitable for free-form surface,a new method based on the softness consolidation abrasives (SCA) is put forward, which means the abrasives are consolidated onthe outer layer of pneumatic wheel to achieve the softness-machining. Binder selecting test shows that acidic silicone is proved tosuit for consolidating particles in cutting process. Combined with robot, the machining system has been established. The machiningeffects of SCA are investigated when it faces with workpiece of different hardness. According to the Preston predicted model, thesimulation results of stress and velocity are proven by analysis of average roughness in the contact region. The contrastive machiningexperimental results show that SCA can supply high cutting stress for material removal and fit for freeform surface’s machining byself-adjustment of flexible body.
Oxidation behavior of YAG-ZrB2 ceramics prepared by spark plasma sintering
Jie-Guang Song,Da-Ming Du,Yin-Yan Ju,Yang-Liang Li,Shi-Bin Li,Gang-Chang Ji 한양대학교 세라믹연구소 2010 Journal of Ceramic Processing Research Vol.11 No.4
ZrB2 and YAG are widely applied because of some excellent properties, but ZrB2 is easily oxidized in high-temperature air. To make ZrB2 ceramics have better oxidation resistance, high-density YAG-ZrB2 ceramics were prepared. The oxidation behavior of YAG-ZrB2 ceramics is investigated at different temperatures. The results indicate that the enhanced weight change differs according to the temperature range, slightly in the temperature 900-1000oC, sharply from 1100-1300 and smoothly above 1300oC. The weight change rate of YAG-ZrB2 ceramics is increased by prolonging the oxidation time, but the weight change rate of YAG-ZrB2 ceramics is gradually reduced. The oxidation layer is porous as compared to the YAG-ZrB2 ceramics layer.
Wang, Guoning,Du, Xiong,Shi, Ying,Tai, Heng-Ming,Ji, Yongliang The Korean Institute of Power Electronics 2018 JOURNAL OF POWER ELECTRONICS Vol.18 No.3
Frequency coupling in the phase domain is a recently reported phenomenon for phase locked loop (PLL) based three-phase grid-inverter systems. This paper investigates the mechanism and stabilization method for the frequency coupling to the stability of grid-inverter systems. Self and accompanying admittance models are employed to represent the frequency coupling characteristics of the inverter, and a small signal equivalent circuit of a grid-inverter system is set up to reveal the mechanism of the frequency coupling to the system stability. The analysis reveals that the equivalent inverter admittance is changed due to the frequency coupling of the inverter, and the system stability is affected. In the end, retuning the bandwidth of the phase locked loop is presented to stabilize the three-phase grid-inverter system. Experimental results are given to verify the analysis and the stabilization scheme.
K-Charmonium Dissociation Cross Sections and Charmonium Dissociation Rates in Hadronic Matter
Feng-Rong Liu,Shi-Tao Ji,Xiao-Ming Xu 한국물리학회 2016 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.69 No.4
K-charmonium dissociation reactions in hadronic matter are studied in the Born approximation, in the quark-interchange mechanism, and with a temperature-dependent quark potential. We obtain the temperature dependence of the unpolarized cross sections for the reactions KJ/ ! ¯D D+ s , ¯D D+ s , ¯DD+ s , and ¯DD+ s ; K 0 ! ¯DD+ s , ¯DD+ s , ¯DD+ s , and ¯DD+ s ; Kc ! ¯DD+ s , ¯DD+ s , ¯D D+ s , and ¯D D+ s . We use the cross sections for charmonium dissociation in collisions with pions, mesons, kaons, vector kaons, and mesons to calculate the dissociation rates of charmonium with five types of mesons. Because of the temperature dependence of the meson masses, dissociation cross sections, and meson distribution functions, the charmonium dissociation rates generally increase with increasing temperature and decrease with increasing charmonium momentum from 2.2 GeV/c. We find that the first derivative of the dissociation rate with respect to the charmonium momentum is zero when the charmonium is at rest. While the + 0 and the + c dissociation reactions can be neglected, the J/ , 0, and c dissociations are caused by collisions with pions, mesons, kaons, vector kaons, and mesons.