Study on Predictive Maintenance Strategy

Hongxia Wang,Xiaohui Ye,Ming Yin 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.4

Predictive Maintenance is the catchword in the present times. First ,the paper analyze the feature of the Predictive Maintenance, include scientific, approximation, timeliness, condition monitoring, fault diagnostic and so on, second the technology system for Predictive maintenance has been studied, including: condition monitoring technology, fault diagnosis technology, state prediction and maintenance decision support and maintenance activities. Finally, the Strategies of Predictive maintenance is given.

Study on the Allocation Problem of the Equipment Maintenance Support Resources

Wang Hongxia,Ye Xiaohui,Yin ming 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.7

Aiming at the problems of lacking of system engineering method for the equipment maintenance support resource allocation problem, the problem to be solved for resource allocation is proposed from the three hierarchical perspective which is “what to allocate , how to allocate, and how much to allocate”; from the three aspects of the demand analysis, allocation method, optimizing allocation, the connotation of the problem is described, and for the each problem the essence of the problem solving method is studied systematically; the proposed method can provide science and technology support for the equipment maintenance support resources allocation scheme in the design phase.

Healthy Assessment Research Electronic Equipment Based on Data Fusion

Ming Yin,Xiaohui Ye,Hongxia Wang 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.11

Healthy assessment weights of using of modern electronic equipment is too subjective problem, it is proposed in this paper that is based on fuzzy analytic hierarchy process and the method based on the theory of the D-S evidence. In solid state transmitter, for example, by analysis of working principle, from the perspective of healthy status evaluation, it will be associated with healthy status indicators stratified processing. Then according to the hierarchy correlation index from the bottom of each layer in systems integration, the paper consider the complexity of system structure and index measurability, and use the analytic hierarchy process and the D-S evidence fusion solid state transmitter overall healthy assessment results.

Study of Credibility Evaluation of Dynamic Models and their Parameters

Guo, Weimin,Ye, Xiaohui,Zhong, Wuzhi,Su, Yi,Tang, Yaohua,Song, Xinli,Liu, Tao The Korean Institute of Electrical Engineers 2014 The Journal of International Council on Electrical Vol.4 No.1

The time-domain simulation plays an important role in planning, designing and operation of the power system, but mismatches between its results and the actual system response show that the credibility evaluation of dynamic models is critical in all the above aspects of power systems. This paper discusses the technologies of credibility evaluation, including hybrid dynamic simulation with PMU measurements, error analysis and the calculated indices. Moreover, a phase shift method is presented to implement hybrid dynamic simulation in PSD-FDS. Then the paper proposes a credibility evaluation scheme to provide solution for the evaluation. At last, one sample is used to validate the implementation of hybrid dynamic simulation, while the other sample illustrates the effectiveness of the credibility evaluation approach.

Identification of Steel Pipe Defect Based on Virtual Instrument

Yin Ming,Ye Xiaohui,Wang Hongxia,Pan Hongbing 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.6

Aiming at the problem of traditional nondestructive testing steel pipe defect, Ultrasonic testing system based on Virtual Instrument was designed. The hardware platform is the signal source which is based on micro-controller, and the HS4 data acquisition card by USB bus. The software platform adopts the LabVIEW to program by using the multithread to acquire all kinds of signal by real-time. The nondestructive feature was found by using the filter, STFT analysis and joint time domain analysis. The designed system has been used to the pipe defect inspection of some company, which is stable and can achieve an anticipant effect.

Damping Controller Design for Triangular Scanning of a Third-Order Nanopositioning Stage

Jie Ling,Tingting Ye,Zhao Feng,Min Ming,Xiaohui Xiao 제어로봇시스템학회 2019 제어로봇시스템학회 국제학술대회 논문집 Vol.2019 No.10

In this paper, a design procedure of damping controller for third-order nanopositioning stage is presented for high-speed triangular scanning. Conventionally, damping control schemes of integral resonant control (IRC) and resonance-shifted IRC (RS-IRC) are designed providing that a second-order model can be identified for a nanopositioning stage. For a third-order system, existing control schemes cannot be applied directly. For this, a pole-zero cancellation technique is presented to design IRC scheme. In addition, a state observer based pole placement technique is proposed for RS-IRC design. The effectiveness of the proposed design procedures is demonstrated through both simulations and experiments based on a piezo-actuated nanopositioning stage platform. Results show that a closed-loop bandwidth of 156 Hz and 186 Hz are obtained by designed IRC and RS-IRC for the third-order nanopositioning stage, and the root-mean-square (RMS) errors of 40 Hz triangular tracking are 49 nm and 13 nm under IRC and RS-IRC control, respectively.

Cardiac-targeted delivery of nuclear receptor RORα via ultrasound targeted microbubble destruction optimizes the benefits of regular dose of melatonin on sepsis-induced cardiomyopathy

Shanjie Wang,Kegong Chen,Ye Wang,Zeng Wang,Zhaoying Li,JunChen Guo,Jianfeng Chen,Wenhua Liu,Xiaohui Guo,Guangcan Yan,Chenchen Liang,Huai Yu,Shaohong Fang,Bo Yu 한국생체재료학회 2023 생체재료학회지 Vol.27 No.00

Background Large-dose melatonin treatment in animal experiments was hardly translated into humans, which may explain the dilemma that the protective effects against myocardial injury in animal have been challenged by clinical trials. Ultrasound-targeted microbubble destruction (UTMD) has been considered a promising drug and gene delivery system to the target tissue. We aim to investigate whether cardiac gene delivery of melatonin receptor mediated by UTMD technology optimizes the efficacy of clinically equivalent dose of melatonin in sepsis-induced cardiomyopathy. Methods Melatonin and cardiac melatonin receptors in patients and rat models with lipopolysaccharide (LPS)- or cecal ligation and puncture (CLP)-induced sepsis were assessed. Rats received UTMD-mediated cardiac delivery of RORα/cationic microbubbles (CMBs) at 1, 3 and 5 days before CLP surgery. Echocardiography, histopathology and oxylipin metabolomics were assessed at 16–20 h after inducing fatal sepsis. Results We observed that patients with sepsis have lower serum melatonin than healthy controls, which was observed in the blood and hearts of Sprague–Dawley rat models with LPS- or CLP-induced sepsis. Notably, a mild dose (2.5 mg/kg) of intravenous melatonin did not substantially improve septic cardiomyopathy. We found decreased nuclear receptors RORα, not melatonin receptors MT1/2, under lethal sepsis that may weaken the potential benefits of a mild dose of melatonin treatment. In vivo, repeated UTMD-mediated cardiac delivery of RORα/CMBs exhibited favorable biosafety, efficiency and specificity, significantly strengthening the effects of a safe dose of melatonin on heart dysfunction and myocardial injury in septic rats. The cardiac delivery of RORα by UTMD technology and melatonin treatment improved mitochondrial dysfunction and oxylipin profiles, although there was no significant influence on systemic inflammation. Conclusions These findings provide new insights to explain the suboptimal effect of melatonin use in clinic and potential solutions to overcome the challenges. UTMD technology may be a promisingly interdisciplinary pattern against sepsis-induced cardiomyopathy.

The Regulation of Phosphorus Release by Penicillium chrysogenum in Different Phosphate via the TCA Cycle and Mycelial Morphology

Wang Liyan,Tian Da,Zhang Xiaoru,Han Mingxue,Cheng Xiaohui,Ye Xinxin,Zhang Chaochun,Gao Hongjian,Li Zhen 한국미생물학회 2023 The journal of microbiology Vol.61 No.8

Phosphate-solubilizing fungi (PSF) efficiently dissolve insoluble phosphates through the production of organic acids. This study investigates the mechanisms of organic acid secretion by PSF, specifically Penicillium chrysogenum, under tricalcium phosphate ( Ca3(PO4)2, Ca–P) and ferric phosphate ( FePO4, Fe–P) conditions. Penicillium chrysogenum exhibited higher phosphorus (P) release efficiency from Ca-P (693.6 mg/L) than from Fe–P (162.6 mg/L). However, Fe–P significantly enhanced oxalic acid (1193.7 mg/L) and citric acid (227.7 mg/L) production by Penicillium chrysogenum compared with Ca–P (905.7 and 3.5 mg/L, respectively). The presence of Fe–P upregulated the expression of genes and activity of enzymes related to the tricarboxylic acid cycle, including pyruvate dehydrogenase and citrate synthase. Additionally, Fe–P upregulated the expression of chitinase and endoglucanase genes, inducing a transformation of Penicillium chrysogenum mycelial morphology from pellet to filamentous. The filamentous morphology exhibited higher efficiency in oxalic acid secretion and P release from Fe–P and Ca–P. Compared with pellet morphology, filamentous morphology enhanced P release capacity by > 40% and > 18% in Ca–P and Fe–P, respectively. This study explored the strategies employed by PSF to improve the dissolution of different insoluble phosphates.