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Sampled-data Fuzzy Control of Two-wheel Inverted Pendulums Based on Passivity Theory
Rongjun Liu,Junfeng Wu,Dan Wang 제어·로봇·시스템학회 2018 International Journal of Control, Automation, and Vol.16 No.5
In this paper, an aperiodically sampled-data control scheme is detailed for the two-wheel inverted pendulum using Takagi-Sugeno (T-S) fuzzy models. The passivity theory is applied in the presence of the disturbances in the actuator channel. A two-rule fuzzy model is utilized to represent the two-wheel inverted pendulum. By using the pendulum angle as the antecedent variable of the fuzzy rule, a passive sampled-data controller is established using the pendulum inclination angle and the mean value of the rim motors’ rotary angles. A Lyapunov-like function based on the two fuzzy rules is constructed to develop criteria of passivity, by the utilization of very-strict passivity in terms of the pendulum angle. Then a solution to the gains of sampled-data controller is synthesized to ensure the very-strict passivity of the pendulum system. By the illustrative examples, the effectiveness of the variable-sampling control scheme is validated for the two-wheel inverted pendulum.
( Yaodong Liu ),( Sibtain Ahmed ),( Yaowei Fang ),( Meng Chen ),( Jia An ),( Guang Yang ),( Xiaoyue Hou ),( Jing Lu ),( Qinwen Ye ),( Rongjun Zhu ),( Qitong Liu ),( Shu Liu ) 한국미생물생명공학회 2022 Journal of microbiology and biotechnology Vol.32 No.4
Chitin deacetylase (CDA) inhibitors were developed as novel antifungal agents because CDA participates in critical fungal physiological and metabolic processes and increases virulence in soil-borne fungal pathogens. However, few CDA inhibitors have been reported. In this study, 150 candidate CDA inhibitors were selected from the commercial Chemdiv compound library through structure-based virtual screening. The top-ranked 25 compounds were further evaluated for biological activity. The compound J075-4187 had an IC50 of 4.24 ± 0.16 μM for AnCDA. Molecular docking calculations predicted that compound J075-4187 binds to the amino acid residues, including active sites (H101, D48). Furthermore, compound J075-4187 inhibited food spoilage fungi and plant pathogenic fungi, with minimum inhibitory concentration (MIC) at 260 μg/ml and minimum fungicidal concentration (MFC) at 520 μg/ml. Therefore, compound J075-4187 is a good candidate for use in developing antifungal agents for fungi control.
Biodiesel production from the esterification of fatty acid over organophosphonic acid
Wei Liu,Xiguang Liu,Shaohua Zhang,Rongjun Qu 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
Biodiesel production from the esterification of fatty acid (stearic acid) with ethanol catalyzed by PA/NaY(PA = organophosphonic acid, NaY = NaY molecular sieve) was investigated, and the effects of PA loading,catalyst amount, molar ratio of ethanol to acid, reaction time and temperature on the esterificationreaction were examined. The optimumvalues for maximum esterification percentage can be obtained byusing a Box–Behnken center-united design with a minimum of experimental work. The pseudohomogeneous(PH) model has been used to simulate the experimental data, and the calculated values ofArrhenius coefficient and activation energy are 6.394 103 and 70.51 kJ/mol, respectively.
Sequence analysis and expression of the calmodulin gene, MCaM-3, in mulberry (Morus L.)
Rongjun Fang,Dongqing Hu,Yinghua Zhang,Long Li,Weiguo Zhao,Li Liu,Jialin Cheng,Jinliang Qi,Yonghua Yang 한국유전학회 2011 Genes & Genomics Vol.33 No.2
A full-length cDNA sequence encoding CaM from mulberry,which we designated MCaM-3 (GenBank accession No:GQ303247), was cloned based on mulberry expressed sequence tags(ESTs). Sequence analysis showed that MCaM-3is 951 base pairs in length, encoding 149 amino acids with a predicted molecular weight of 16.85 kD and an isoelectric point of 3.95. Online SMART analysis showed that the MCaM-3 protein has four EFh functional domains, which can bind calcium. The expression level of MCaM-3at different developmental stages in mulberry leaves and flowers and in different tissues was investigated. The results showed that MCaM-3 transcripts are most abundantly expressed in mature tissues, such as mature female flowers and climax leaves, and the expression level of the mRNA could be increased significantly under low temperature, drought, and salt stress conditions compared to the normal growth environment. This research will help us understand the resistance mechanism of functional genes in mulberry.
In vitro Inhibition of Fungal Root-Rot Pathogens of Panax notoginseng by Rhizobacteria
Rongjun Guo,Xingzhong Liu,Shidong Li,Zuoqing Miao 한국식물병리학회 2009 Plant Pathology Journal Vol.25 No.1
The rhizobacteria of Panax notoginseng were isolated from six sites in Yanshan, Maguan and Wenshan Counties, Yunnan Province of China, and their antagonistic activity against P. notoginseng root-rot fungal pathogens was determined. Of the 574 rhizobacteria isolated, 5.8% isolates were antagonistic in vitro to at least one of the five pathogens, Cylindrocarpon didynum, Fusarium solani, Phytophthora cactorum, Phoma herbarum, and Rhizoctonia solani. The number of rhizo bacteria and the number that inhibited fungi differed depending on sampling sites and isolation methods. Rhizobacteria isolated from the site in Yanshan and Maguan showed more antagonistic effect than them in Wenshan. Heat treatment of rhizosphere soil at 80oC for 20 min scaled the antagonists up to 14.0%. Antagonistic bacteria in the roots proportioned 3.9% of the total isolates. The most antagonistic isolates 79-9 and 81-4 are Bacillus subtilis based on their 16S rDNA sequence and biochemical and physiological characteristics. Identification and evaluation of antagonistic bacteria against P. notoginseng root-rot pathogens in the main planting areas improved our understanding of their distribution in rhizosphere soil. Furthermore these results indicated that the interactions between biocontrol agent and soil microbes should be seriously considered for the successful survival and biocontrol efficacy of the agents in soil.
Rongjun Chen,Yongrong Liao,Shengbin Liu,Yunyun Jiang,Changqiong Hu,Xuewei Zhang,Xufeng Cao,Zhengjun Xu,Xiaoling Gao,Lihua Li,Jianqing Zhu 한국유전학회 2017 Genes & Genomics Vol.39 No.1
Dirigent (DIR) and DIR-like family genes were involved in lignification or in the response to pathogen infection and abiotic stress in plants. Little is known to us about how rice DIR genes respond to adverse conditions. In this study, we reported genome-wide analysis of 49 DIR or DIR-likes genes in rice. The 49 OsDIRs or OsDIR-likes were tandem arranged into ten clusters. The phylogenetic analysis indicated that the 49 rice DIR and DIR-like genes cluster into five distinct subfamilies, DIR-a and four DIRlike subfamilies (DIR-b/d, and DIR-g, DIR-c, DIR-e). Meta-analysis of microarray gene expression datas indicated that all the OsDIRs or OsDIR-likes were expressed almost at the same level but with different patterns: most OsDIRs or OsDIR-likes were expressed exclusively in stigma and ovary and were induced by IAA and BAP; several genes were induced by trans-zeatin (tZ) and DMSO; 23 OsDIRs or OsDIR-likes were responded to abiotic stress. Our analysis also showed that most of these genes could respond to abiotic stresses, which contained cis-regulatory elements. The present study will provide a useful reference for further functional analysis of the DIR genes in rice.
In vitro Inhibition of Fungal Root-Rot Pathogens of Panax notoginseng by Rhizobacteria
Guo, Rongjun,Liu, Xingzhong,Li, Shidong,Miao, Zuoqing The Korean Society of Plant Pathology 2009 Plant Pathology Journal Vol.25 No.1
The rhizobacteria of Panax notoginseng were isolated from six sites in Yanshan, Maguan and Wenshan Counties, Yunnan Province of China, and their antagonistic activity against P. notoginseng root-rot fungal pathogens was determined. Of the 574 rhizobacteria isolated, 5.8% isolates were antagonistic in vitro to at least one of the five pathogens, Cylindrocarpon didynum, Fusarium solani, Phytophthora cactorum, Phoma herbarum, and Rhizoctonia solani. The number of rhizo bacteria and the number that inhibited fungi differed depending on sampling sites and isolation methods. Rhizobacteria isolated from the site in Yanshan and Maguan showed more antagonistic effect than them in Wenshan. Heat treatment of rhizosphere soil at $80^{\circ}C$ for 20 min scaled the antagonists up to 14.0%. Antagonistic bacteria in the roots proportioned 3.9% of the total isolates. The most antagonistic isolates 79-9 and 81-4 are Bacillus subtilis based on their 168 rDNA sequence and biochemical and physiological characteristics. Identification and evaluation of antagonistic bacteria against P. notoginseng root-rot pathogens in the main planting areas improved our understanding of their distribution in rhizosphere soil. Furthermore these results indicated that the interactions between biocontrol agent and soil microbes should be seriously considered for the successful survival and biocontrol efficacy of the agents in soil.
Ping Yin,Rongjun Qu,Mingyu Xu,Wei Liu,Xiguang Liu,Qiang Xu 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.2
The novel functional composite silica microspheres encapsulated by organophosphonated polystyrene(SG–PS–N–P) has been successfully synthesized. SG–PS–N–P was employed to adsorb Au(III) fromsimulated wastewater, and it exhibited excellent performance, and the maximum adsorption capacitywas 980.39 mg/g at 35 ℃. The adsorption process optimization was performed using response surfacemethodology (RSM), and the analysis of variance (ANOVA) of the quadratic model demonstrated that themodel was highly significant. Moreover, the regeneration capacities of SG–PS–N–P were investigated,and it has been found that the adsorption capability remains high after several cycles of adsorption–desorption.
Compressed Sensing-based Multiple-target Tracking Algorithm for Ad Hoc Camera Sensor Networks
( Xu Lu ),( Lianglun Cheng ),( Jun Liu ),( Rongjun Chen ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.3
Target-tracking algorithm based on ad hoc camera sensor networks (ACSNs) utilizes the distributed observation capability of nodes to achieve accurate target tracking. A compressed sensing-based multiple-target tracking algorithm (CSMTTA) for ACSNs is proposed in this work based on the study of camera node observation projection model and compressed sensing model. The proposed algorithm includes reconfiguration of observed signals and evaluation of target locations. It reconfigures observed signals by solving the convex optimization of L1-norm least and forecasts node group to evaluate a target location by the motion features of the target. Simulation results show that CSMTTA can recover the subtracted observation information accurately under the condition of sparse sampling to a high target-tracking accuracy and accomplish the distributed tracking task of multiple mobile targets.
Kun Deng,Ping Yin,Xiguang Liu,Qinghua Tang,Rongjun Qu 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
The agricultural residuals buckwheat hulls in the region of Jiaodong, China (BHJC) were employed to adsorb Au(III) ions both in the spiked samples and the gold-plating wastewater samples, and the relevant adsorption kinetics and isotherms were investigated. The investigation on the adsorption selectivity showed that BHJC displayed strong affinity for gold in the aqueous solutions. Furthermore, the process optimization was performed using response surface methodology (RSM), the quantitative relationship between the gold uptake and the different levels of experimental factors was used to work out optimized levels of these parameters.