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Xiaoju Yin,Fengge Zhang,Xiuping Wang,Yonggang Jiao,Zhenghe Ju 보안공학연구지원센터 2015 International Journal of Hybrid Information Techno Vol.8 No.10
The combination of ampere-hour method and open-circuit voltage method in the photovoltaic measurement system is studied in this paper. In order to achieve the purpose of online measurement for remaining capacity, the influence of internal battery discharge and temperature on the battery capacity should be considered. The battery capacity decreases by the increasing charging times, and the increasing terminal voltage difference causes the inaccurate measurement of the capacity of battery. In this paper, two experimental measurement methods are employed, which are complementary to each other, to make the system measurement more accurate and extend the life of lead-acid batteries. If the charging process of photovoltaic system is unstable, an optimization of lead-acid battery applications in photovoltaic energy storage system is explored at the same time. Finally, an illustrative example is presented to demonstrate the effectiveness of the proposed measuring method.
The Least Action Solving Method of MPPT for Micro-Inverter in Distributed PV Grid
Xiaoju Yin,Fengge Zhang,Yonggang Jiao,Zhenhe Ju 보안공학연구지원센터 2015 International Journal of Grid and Distributed Comp Vol.8 No.4
The solar radiation conditions and environmental factors on the shadow of the power generation resulted in loss of efficiency. In this paper, a simple structure with interleaved isolation converter according to the characteristics of the hardware circuit is proposed in order to improve the conversion efficiency of photovoltaic grid system. First, the hot spot effect and discretization of solar panels according to the characteristics of the micro-inverter with a lot of promotion is analyzed. The least action recursive method is involved, which has high computing precision, and therefore is more suitable for distributed micro-inverter system. The PC56F8245 chip is chosen to overcome the loss of photovoltaic energy and improve the conversion efficiency. The stability and high accuracy has been proved through the related experiments.
Xiaoju Liu,Haitao Feng,Yang Li,Xiaoyan Ma,Fang Chen,Qilong Yan 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.115 No.-
Three novel ferrocene-based hydrazone energetic transition-metal complexes denoted as M/E-FcDz-TMCs (M = Co (II), Fe (III), and Co(II)Fe(III)), were successfully prepared to improve the thermal decompositionof ammonium perchlorate (AP) and anti-migration performance of Fc-based catalysts. 1-hydrazinoethylene-ferrocene (E-FcDz) with unique electronic structure and energy bonds (C@N, NAN)as ligand reacted with transition metal Co, or Fe mono-metal nodes, and Co-Fe bimetal nodes, respectively. The chemical structure, crystalline texture, and morphology were confirmed, and the catalytic performancewas investigated. The thermal decomposition kinetics were estimated by applying Kissinger,FWO, and KAS methods. The results revealed that M/E-FcDz-TMCs had superior catalytic performancesfor AP decomposition compared to the traditional catalyst catocene due to their high electron transportcapacity. Especially, CoFe/E-FcDz-TMCs showed the best catalytic efficiency due to the hybridizationbetween Co (II) 3d and Fe (III) 3d orbitals in the structure led to electron redistribution, driving the optimalsynergistic catalytic effect of the bimetal Co-Fe nodes and E-FcDz, and further enhancing catalysis forAP. Moreover, AP/CoFe/E-FcDzTMCs showed the best combustion performance. In addition, the thermaldecomposition products of AP were explored by TG/FTIR, and the AP thermal decomposition processcould be explained by a possible mechanism following the principle of electron transfer theory.
Single-Step Adaptive Offset Min-Sum Algorithm for Decoding LDPC Codes
林小菊(Xiaoju Lin),康秀藺(Gansuren Baasantseren),이해기(Hae-Kee Lee),김성수(Sung-Soo Kim) 대한전기학회 2010 전기학회논문지 P Vol.59 No.1
Low-density parity-check (LDPC) codes with belief-propagation (BP) algorithm achieve a remarkable performance close to the Shannon limit at reasonable decoding complexity. Conventionally, each iteration in decoding process contains two steps, the horizontal step and the vertical step. In this paper, an efficient implementation of the adaptive offset min-sum (AOMS) algorithm for decoding LDPC codes using the single-step method is proposed. Furthermore, the performances of the AOMS algorithm compared with belief-propagation (BP) algorithm are investigated. The algorithms using the single-step method reduce the implementation complexity, speed up the decoding process and have better efficiency in terms of memory requirements.
Lei Zhou,Lianghua Li,Xiaoju Liu,Xiaojun Wang 보안공학연구지원센터 2014 International Journal of Future Generation Communi Vol.7 No.6
Both in academic and industrial research, building a green energy-saving network has become a hot topic. Combined with hardware division and adaptive algorithm, this paper proposes an adaptive frequency control mechanism based on traffic to reduce power consumption. By calculating real-time traffic, the network device can adjust its operating frequency. On the premise of maintaining network performance, this mechanism could reduce the power consumption significantly. Besides, the adaptive frequency mechanism has been verified and realized in the NetFPGA Reference Router. Experimental data show that under different ranges of traffic loads and without affect its performance, the Router embedded this mechanism can reduce power consumption by more than 20%.
Qiming Wang,Xiaoju Tu,Keqin Deng,Jianxin Zeng,Xiaoying Zhao,Dongying Tang,Xuanming Liu 한국식물학회 2009 Journal of Plant Biology Vol.52 No.6
The double B-box (DBB) type zinc finger protein has thus far been shown to be involved in photomorphegenesis in Arabidopsis thaliana. Here, we show that DBB1a is expressed in the embryo, cytolden, and flower. Misexpression of DBB1a in mutant plants resulted in abnormal numbers and patterns of floral organs. We further show that DBB1a could regulate expression of several floral homeotic genes, including APETALA 2, APETALA 3, PISTILLATA, and AGAMOUS. Interestingly, expression of the microRNA gene MiR172, which is involved in organ boundary establishment, was also misregulated in the dbb1a mutant plants. Our study identified a previously uncharacterized role of DDB1a in regulation of expression of floral homeotic genes and miR172, which is important for understanding of floral pattern formation.
High Order Template Scheme for Rapid Acquisition in the UWB Communication System
康秀藺(Gansuren Baasantseren),林小菊(Xiaoju Lin),이해기(Hae-Kee Lee),김성수(Sung-Soo Kim) 대한전기학회 2010 전기학회논문지 P Vol.59 No.1
The low power of ultra-wideband (UWB) signal makes the acquisition of UWB signal be a more challenging task. In this paper, we propose the method of high order template signal technique that reduces the synchronization time. Experimental results are presented to show the improvements of performance in the mean acquisition time (MAT) and the probability of detection. The performance compared with the serial search, the truly random search and the random permutation search. It is shown that over typical UWB multipath channels, a random permutation search scheme may yield lower MAT than serial search.
Liu Hao,Yin Xiaoju 대한전기학회 2022 Journal of Electrical Engineering & Technology Vol.17 No.1
This paper mainly studies two-dimensional analytic method to analyze and calculate a short-secondary type slotless permanent magnet linear synchronous motor (SST-SPMLSM) performance. Due to the large air-gap and more magnetic fl ux leakage of electric machine, this paper proposes the groove-by-groove method to analyze the winding equivalent current density. Meanwhile, the volume current density is used to equivalent the permanent magnet magnetization, which is obtained the permanent magnet equivalent current density. According to the electric machine structure, the divided layers model of the SST-SPMLSM is built. Based on the hierarchical analytical model and equivalent current density of the electric machine, the two-dimensional magnetic vector potential of each region in the SST-SPMLSM is derived by the separated variable method. Combined with the boundary conditions of the electric machine, the magnetic fl ux densities of the SST-SPMLSM with diff erent regions are derived. In the meantime, a 30 N SST-SPMLSM is designed. On this basis, the magnetic fl ux density, detent force, and electromagnetic thrust force of the SST-SPMLSM are analyzed and calculated, which of the results are verifi ed by fi nite element method. From the results, it satisfi es the design requirements of the SST-SPMLSM, and verifi es the validity and correctness of analytical method.
Jiangtao Lin,Bin Xing,Huaping Tang,Lan Yang,Yadong Yuan,Yuhai Gu,Ping Chen,Xiaoju Liu,Jie Zhang,Huiguo Liu,Changzheng Wang,Wei Zhou,Dejun Sun,Yiqiang Chen,Zhuochang Chen,Mao Huang,Qichang Lin,Chengpin 대한천식알레르기학회 2020 Allergy, Asthma & Immunology Research Vol.12 No.3
Purpose: Details of patients hospitalized for asthma exacerbation in mainland China are lacking. To improve disease control and reduce economic burden, a large sample survey among this patient population is indispensable. This study aimed to investigate the clinical characteristics and outcomes of such patients. Methods: A retrospective study was conducted on patients hospitalized for asthma exacerbation in 29 hospitals of 29 regions in mainland China during the period 2013 to 2014. Demographic features, pre-admission conditions, exacerbation details, and outcomes were summarized. Risk factors for exacerbation severity were analyzed. Results: There were 3,240 asthmatic patients included in this study (57.7% females, 42.3% males). Only 28.0% used daily controller medications; 1,287 (39.7%) patients were not currently on inhaled corticosteroids. Acute upper airway infection was the most common trigger of exacerbation (42.3%). Patients with severe to life-threatening exacerbation tended to have a longer disease course, a smoking history, and had comorbidities such as hypertension, chronic obstructive pulmonary disease (COPD), and food allergy. The multivariate analysis showed that smoking history, comorbidities of hypertension, COPD, and food allergy were independent risk factors for more severe exacerbation. The number of patients hospitalized for asthma exacerbation varied with seasons, peaking in March and September. Eight patients died during the study period (mortality 0.25%). Conclusions: Despite enhanced education on asthma self-management in China during recent years, few patients were using daily controller medications before the onset of their exacerbation, indicating that more educational efforts and considerations are needed. The findings of this study may improve our understanding of hospital admission for asthma exacerbation in mainland China and provide evidence for decision-making.
Pengfei Liao,Jinqiu Huang,Puguo Tong,Wang Nie,Xin Yan,Yingmei Feng,Hui Peng,Xiaojue Peng,Shao-Bo Li 한국유전학회 2017 Genes & Genomics Vol.39 No.5
Genes encoding inositolphosphorylceramide synthase (IPCS), which play essential roles in sphingolipid biosynthesis, have been known to be widely distributed in plants. However, reports on identification, expression, and function analysis of plant IPCS family genes are very limited. In this study, a total of three OsIPCS genes were identified in the rice database, and their full-length coding regions were amplified by RT-PCR. These genes had 12–13 exons, and they encoded proteins of 313–326 amino acids with molecular mass of 35.8–37.6 kDa and isoelectric point of 10.99–12.61. Importantly, two typical and conserved motifs (D3 and D4) in plants were found in all the three putative OsIPCS proteins, indicating high similarity of OsIPCSs to the other plant IPCS proteins, which were confirmed by phylogenetic analysis. The transcripts of OsIPCS genes appeared in different rice organs including seedling roots, stems and leaves, and young panicles, but each gene showed a unique organ-specific expression pattern. Meanwhile, we found that all the three OsIPCS genes showed responses to stresses like drought, cold and salt, but their expression patterns were also to some extent different under stress treatments. Especially, under cold stress, OsIPCS1 and OsIPCS2 were significantly up-regulated in roots and stems but down-regulated in leaves, while OsIPCS3 was significantly up-regulated in all the measured organs. Actually, putative abiotic-stress regulatory elements were identified in the promoters of these genes. Our data suggest that OsIPCS genes should play important roles during rice growth and adversity adaptation.