System Identification of Vehicle Dynamics Using Recurrent Neural Networks

Jin-Gyu An,Jong-Hoon Won 한국ITS학회 2022 한국ITS학회 학술대회 Vol.2022 No.06

This paper presents the data-driven modeling based on recurrent neural network (RNN) for the system identification of vehicle dynamics. For the accurate control of an autonomous vehicle, a sophisticated model of the vehicle dynamics is required. Data-driven modeling can achieve such a model only with the data obtained from the target. A simulation result by using the data from a driving simulator is included to test the feasibility of the RNN for the system identification of a ground vehicle.

A Switched Quasi-Z-Source Inverter with Continuous Input Currents

Jing Yuan,Yongheng Yang,Frede Blaabjerg 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5

This paper proposes a modified Switched quasi-ZSource Inverter (Sq-ZSI). The proposed Sq-ZSI achieves continuous input currents with a larger conversion ratio by replacing one diode of the Diode-assisted Switched Boost Inverter (DASBI) with a capacitor. Moreover, the voltage stress of the power switches in the proposed Sq-ZSI is lower and the voltage stress of the capacitors remains the same. The proposed topology is benchmarked with other Z-source inverters using active switches in terms of conversion ratio, voltage gain, and stresses on the power switches and capacitors. Simulation and experimental tests are provided to validate the analysis.

Roles of RpoS in Yersinia pseudotuberculosis stress survival, motility, biofilm formation and type VI secretion system expression

Jingyuan Guan,Xiao Xiao,Shengjuan Xu,Fen Gao,Jianbo Wang,Tietao Wang,Yunhong Song,Junfeng Pan,Xihui Shen,Yao Wang 한국미생물학회 2015 The journal of microbiology Vol.53 No.9

RpoS (σS), the stationary phase/stress σ factor, controls the expression of a large number of genes involved in cellular responses to a variety of stresses. However, the role of RpoS appears to differ in different bacteria. While RpoS is an important regulator of flagellum biosynthesis, it is associated with biofilm development in Edwardsiella tarda. Biofilms are dense communities formed by bacteria and are important for microbe survival under unfavorable conditions. The type VI secretion system (T6SS) discovered recently is reportedly associated with several phenotypes, ranging from biofilm formation to stress sensing. For example, Vibrio anguillarum T6SS was proposed to serve as a sensor for extracytoplasmic signals and modulates RpoS expression and stress response. In this study, we investigated the physiological roles of RpoS in Yersinia pseudotuberculosis, including bacterial survival under stress conditions, flagella formation, biofilm development and T6SS expression. We found that RpoS is important in resistance to multiple stressors–including H2O2, acid, osmotic and heat shock–in Y. pseudotuberculosis. In addition, our study showed that RpoS not only modulates the expression of T6SS but also regulates flagellum formation by positively controlling the flagellar master regulatory gene flhDC, and affects the formation of biofilm on Caenorhabditis elegans by regulating the synthesis of exopolysaccharides. Taken together, these results show that RpoS plays a central role in cell fitness under several adverse conditions in Y. pseudotuberculosis.

Research on the application of lion culture elements in lacquer painting creation in southern Fujian-Take the lacquer painting "Min · Lion" as an example

Jingyuan Wang,Hejing Lin,Jun Wei,Xiaobo Lian KOREA INSTITUTE FOR HUMANITIES AND SOCIAL SCIENCES 2023 Journal of Arts and Cultural Studies(ACS) Vol.2 No.2

This study explores the application methods of combining Minnan lion culture with lacquer art from a lacquer art creation research perspective under the "14th Five Year Plan" cultural industry development plan. By examining the lion dance and lacquer art cultures with Minnan characteristics, this study explores how to solve the neglect of traditional culture. It promotes Minnan lion and lacquer art cultures to create a unique brand in Minnan. Objective: To use modern methods to improve people's aesthetics, enhance local cultural soft power, improve economic development, attract more people to enter the Minnan region, promote Minnan Lion Culture and lacquer art industry, improve the level of innovation in Minnan Lion Culture, and to ring positive impacts to the inheritance and promotion of lion culture and lacquer art in Minnan. Methods: Using literature review and practical methods combined with modern lacquer art creation theory for analysis. Summarize the lacquer art creation under the cultural elements of Minnan Dragon and Lion regarding their expression, humanistic value, and connotation, the artistic characteristics and market status of lacquer art, and the feasibility and necessity of combining the two. Results: Summarized the cultural origin and basic knowledge of Minnan lion culture and lacquer painting and explored the path of integrating Minnan lion culture and lacquer art. Conclusion: Analyzed the research on Minnan lion culture and lacquer art creation and integrated Minnan lion culture and lacquer art creation to complete the "Min Lion" lacquer painting creation.

Irrigation Society in China’s Northern Frontier, 1860s-1920s

Jingyuan Du,Max D. Woodworth 고려대학교 민족문화연구원 2011 Cross-Currents Vol.- No.1

In this article, the authors examine the social and spacial organization of irrigation systems in the Hetao region (in current-day western Inner Mongolia Autonomous Region) during the late Qing and early Republican periods. Counter to Karl Wittfogel’s thesis on the inevitability of centralized state bureaucracy in the formation and management of a “hydraulic civilization,” the authors suggest that non-state actors played a decisive role in the construction of irrigation systems in this region on the northern periphery of the Chinese empire and the frontier of agricultural expansion. Their findings are more closely in line with Clifford Geertz’s work in Bali and other more recent studies of irrigation societies, in that they demonstrate that the land-owning Mongol aristocracy, Han Chinese immigrant cultivators and traders, as well as the Catholic Church formed a network of land conversion agents, labor supply, construction management, and finance. These networks of non-state actors were decisive in building extensive hydraulic projects and shaping a multinucleated territorial politics in the northern frontier of the empire.

Analysis of large concrete storage tank under seismic response

Jingyuan Li,Xiaochuan You,Hongcheng Cui,Qiang He,Jinsan Ju 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.1

This study adopted the finite element software ABAQUS to trace the dynamic response history of large reinforced concrete storagetank during different seismic excitations. The dynamic characteristics and failure modes of the tank’s structure were investigated by consideringthe rebar’s effect. Calculation results show that the large concrete storage tank remains in safe working conditions under a seismicacceleration of 55 cm/s2. The joint of the concrete wall and dome begins to crack when seismic acceleration reaches 250 cm/s2. Asthe earthquake continues, cracks spread until the top of the wall completely fails and stops working. The maximum displacement of theconcrete tank and seismic acceleration are in proportion. Peak displacement and stress of the tank always appear behind the maximumacceleration.

Channel modeling based on multilayer artificial neural network in metro tunnel environments

Jingyuan Qian,Asad Saleem,Guoxin Zheng Electronics and Telecommunications Research Instit 2023 ETRI Journal Vol.45 No.4

Traditional deterministic channel modeling is accurate in prediction, but due to its complexity, improving computational efficiency remains a challenge. In an alternative approach, we investigated a multilayer artificial neural network (ANN) to predict large-scale and small-scale channel characteristics in metro tunnels. Simulated high-precision training datasets were obtained by combining measurement campaign with a ray tracing (RT) method in a metro tunnel. Performance on the training data was used to determine the number of hidden layers and neurons of the multilayer ANN. The proposed multilayer ANN performed efficiently (10 s for training; 0.19 ms for prediction), and accurately, with better approximation of the RT data than the single-layer ANN. The root mean square errors (RMSE) of path loss (2.82 dB), root mean square delay spread (0.61 ns), azimuth angle spread (3.06°), and elevation angle spread (1.22°) were impressive. These results demonstrate the superior computing efficiency and model complexity of ANNs.

Microwave-Assisted Controllable Synthesis of Nickel Nanoparticles Embedded in Mesoporous Silica for Catalytic Reduction of 4-Nitrophenol

Jingyuan Cao,Fei Wang,Shuai Liang,Xue Tong,Zhongnan Zhang,Jian Feng,Haifeng Wang,Xingmao Jiang 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2017 NANO Vol.12 No.10

Nickel nanoparticles embedded in mesoporous silica (Ni/SiO2) were successfully synthesized by microwave-assisted in situ self-assembly method using colloidal silica, urea and nickel nitrate as precursors and glucose as carbon template, which resulted in mesoporous structure of silica through removal of template. Ni nanoparticles were uniformly well-dispersed within mesoporous silica, which were 3.5–4.0nm in diameter and had a very narrow particle size distribution. In addition, particle size of Ni nanoparticles can be controllably adjusted by microwave power. As prepared Ni/SiO2 catalyst exhibited better catalytic activity for reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) than Ni/SiO2-IM catalyst, which was mainly attributed to confinement effect of mesoporous silica support. This simple and versatile method can also be extended to cover many kinds of other supported catalysts for broad applications in many other catalytic reactions in the future.

ATP Recognition Based on the FRET from Organic Semiconducting Molecules to Cy3 Fluorophores

Jingyuan Huang,Chunzhi Cui,안동준 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1

Adenosine triphosphate as a major source of chemical energy in living organisms can drive many processes in living cells. In the previous researches, ATP recognition is playing a critical part in cell biology and clinical diagnostics. However, traditional methods, such as chromatographic, electrochemical and bio luminometric approaches are time-consuming and involved in complex chemical or enzymatic reactions. In this research, hybrid-assemblies has been fabricated which composed of double strands DNA and organic semiconducting tri (8-hydroxyquinoline) aluminium (Alq3) molecules. One of the single-strand DNA molecules which labeled with the Cy3 fluorophore can specifically recognize ATP as an aptamer. Under this condition, FFrster resonance energy transfer (FRET) from Alq3 to Cy3 can be observed. However, after adding ATP, owing to strong affinity with ATP, Cy3 labeled aptamer release from the hybrid-assemblies that induced the decreasing of FRET.

A Novel Pepper (Capsicum annuum L.) WRKY Gene, CaWRKY30, Is Involved in Pathogen Stress Responses

Zheng Jingyuan,Zou Xuexiao,Mao Zhenchuan,Xie Bingyan 한국식물학회 2011 Journal of Plant Biology Vol.54 No.5

WRKY proteins are a superfamily of transcription factors involved in many plant processes including plant defense responses to biotic and abiotic stresses. We isolated a WRKY gene from pepper during the incompatible interaction between the pepper cultivar HDA149 and Meloidogyne incognita. The full-length gene, named as CaWRKY30, has a 1,533-bp cDNA sequence and contains an open reading frame of 1,095 bp, encodes a putative polypeptide of 364 amino acids with a theoretical protein size of 41.2 kDa, and contains one WRKY domain followed by a zinc-finger motif. The genomic sequence of CaWRKY30 contains three exons and two introns. Southern blot analysis confirmed that CaWRKY30 exists as a single copy in the pepper cultivar HDA149 genome. Quantitative RT-PCR showed that CaWRKY30 is up-regulated by application of various pathogens including avirulent M. incognita, Tobacco mosaic virus, Ralstonia solanacerum,and Phytophthora capsici Leonian. Furthermore, the transcripts of CaWRKY30 were rapidly induced after treatment with phytohormones salicylic acid (SA). However, the expression of CaWRKY30 was down-regulated by virulent M. incognita and phytohormones methyl jasmonic acid (MeJA). In addition, the nuclear localization of CaWRKY30 was determined when a CaMV35s::CaWRKY30-eGFP fusion construct was expressed in onion epidermal cells. These results suggested that CaWRKY30might be involved in plant defense mechanisms against the diverse pathogen infection.