Renjie Ji
China University of Petroleum
Surface roughnessEngineeringDielectricCeramicElectrical discharge machiningComposite materialElectrodeMetallurgyMaterials scienceEngineering drawingScanning electron microscopeGrindingEmulsionSilicon carbideComputer scienceMachiningForensic engineeringMechanical engineeringMicrostructureElectric discharge
100Publications
25H-index
1,942Citations
Publications 95
Newest
Abstract null null A novel methodology for evaluation of safety instrumented systems (SISs) with heterogeneous components based on multi-stage dynamic Bayesian networks (MDBNs) is proposed. The unified evaluation model for M-out-of-N architectures based on MDBNs is constructed. An automatic modeling method of conditional probability tables for time-slice and inter-slice transitions is established. Average probability of failure on demand (PFDavg) and probability of failing safety (PFS) of the st...
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Abstract null null Particle enhanced Ni Fe composite coating is widely used in the industrial field because of its excellent mechanical properties. If its mechanical properties are improved, its application will be further promoted. In this paper, Ni-Fe-WC composite coatings were prepared by jet electrodeposition (JED). The effects of deposition temperature and deposition current density on the composition and structure of the coatings were investigated. The results show that with the increase o...
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#1Baoping Cai (China University of Petroleum)H-Index: 30
#2Hao Keke (China University of Petroleum)
Last. Yonghong Liu (China University of Petroleum)H-Index: 30
view all 8 authors...
Abstract Permanent magnet synchronous motor (PMSM) is one of the common core power components in modern industrial systems. Early fault diagnosis can avoid major accidents and plan maintenance in advance. However, the features of early faults are weak, and the symptoms are not obvious. Meanwhile, the fault signal is often overwhelmed by noise. Accordingly, fault diagnosis for early faults is difficult, and the diagnostic accuracy is generally low. A Bayesian-network-based data-driven early fault...
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#1Fan Zhang (China University of Petroleum)H-Index: 4
#2Renjie Ji (China University of Petroleum)H-Index: 25
Last. Qian Zheng (China University of Petroleum)H-Index: 2
view all 8 authors...
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#1Baoping Cai (China University of Petroleum)H-Index: 30
Last. Ren-jie JiH-Index: 1
view all 8 authors...
Leakage is one of the most important reasons for failure of hydraulic systems. The accurate positioning of leakage is of great significance to ensure the safe and reliable operation of hydraulic systems. For early stage of leakage, the pressure of the hydraulic circuit does not change obviously and therefore cannot be monitored by pressure sensors. Meanwhile, the pressure of the hydraulic circuit changes frequently due to the influence of load and state of the switch, which further reduces the a...
1 CitationsSource
#1Baoping Cai (China University of Petroleum)H-Index: 30
#2Zhang Yanping (China University of Petroleum)H-Index: 1
Last. Jing Liu (China University of Petroleum)H-Index: 3
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Abstract Many resilience evaluation methods were proposed to assess system resilience under the influence of specific, constant disasters, and these methods are restricted by fixed external disasters. A novel evaluation methodology combining Markov model and dynamic Bayesian networks (DBNs) is developed, and is suitable for resilience evaluation under the influence of various external disasters. The external disaster model is established by mapping from actual physical models of influencing fact...
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#1Gao Chuntan (China University of Petroleum)H-Index: 2
#2Baoping Cai (China University of Petroleum)H-Index: 30
Last. Yonghong Liu (China University of Petroleum)H-Index: 30
view all 7 authors...
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#1Shenggui Liu (China University of Petroleum)
#2Renjie Ji (China University of Petroleum)H-Index: 25
Last. Baoping Cai (China University of Petroleum)H-Index: 30
view all 9 authors...
Abstract Type III deep eutectic solvents (DES) have been extensively studied as a green electrodeposition solvent due to their wide potential window and degradability. The preparation of nickel-based coatings from DES commonly uses nickel chloride as the main precursor of Ni2+, but it generates harmful chlorides during long-term electrodeposition. This article uses nickel sulfate as the main precursor of Ni2+ to investigate the effects of boric acid and water on the deposition of Ni/TiO2 composi...
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#1Baoping Cai (China University of Petroleum)H-Index: 30
#2Hongyan Fan (China University of Petroleum)H-Index: 1
Last. Renjie Ji (China University of Petroleum)H-Index: 25
view all 7 authors...
Abstract With the continuous improvement of the complexity and comprehensive level of the system, its reliability becomes more and more important. The remaining useful life (RUL) estimation method using the degradation model with random effect to describe the degradation process of the system has been widely used such as Wiener process. However, the conventional Wiener-process-based degradation model only considers the current monitoring data but not the historical degradation data, which leads ...
10 CitationsSource
#1Fan Zhang (China University of Petroleum)H-Index: 4
#2Renjie Ji (China University of Petroleum)H-Index: 25
Last. Baoping Cai (China University of Petroleum)H-Index: 30
view all 10 authors...
Abstract Exploring the low-cost and high-efficient electrocatalysts with Pt-like activity for alkaline hydrogen evolution through water splitting is imperative yet challenging. Herein, a simple synthesis combined with electrodeposition and facile electro-oxidation is developed to construct the hollow dendritic self-supported electrode (HDSE). X-ray photoelectron spectroscopy (XPS), X-ray absorption fine structure (XAFS), and electron paramagnetic resonance (EPR) reveal that the surface of HDSE c...
6 CitationsSource