A novel hybrid <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LLC</i> resonant and dual active bridge (DAB) linear dc–dc converter is proposed as bus converter, which can achieve soft switching constant output voltage gain at both the open-loop light load closed-loop heavy conditions. This paper focuses on its continuous-time average modeling in detail based dc voltage, first order terms of two transformer currents capacitor results a...

Bi₄O₅I₂ exhibits an extremely high second harmonic generation response and enhanced photocatalytic activity. The multifunction of is mainly resulting from the dipole moment stereochemical activity Bi 6s lone pairs.

State-of-health (SOH) is a health index (HI) that directly reflects the performance degradation of lithium-ion batteries in engineering, but SOH Li-ion difficult to measure directly. In this paper, novel data-driven method proposed estimate accurately and explore relationship-like mechanism. First, features battery should be extracted from data. Next, by using evolution genetic programming reflect change SOH, mathematical model describing relationship between constructed based on...

Nonylphenol ethoxylate-n (NPnEO) is a nonionic surfactant, and can be degraded in chemical biological ways for short-chain NPnEO with n ≤ 10. However, when >10, the degradation of NPEO wastewater was seldom reported. In this study, electrochemical oxidation long-chain NP40EO at high saline investigated. The main influencing factors such as current density, plate distance, initial pH, salt type, concentration on were evaluated. oxygen demand (COD) removal efficiency increased increase density...

In response to the challenge of existing wireless communication anti-jamming methods in effectively handling unknown jamming, this paper proposes a multi-parameter control algorithm for systems based on Linear–Quadratic Regulator (LQR). First, proposed models system as linear switched modulation and coding scheme. Subsequently, feedback controller design method LQR is introduced. By utilizing multiple Lyapunov function combined with matrix inequalities, sufficient criteria asymptotic...

To optimize the electric field distribution of HVDC GIL spacer under working conditions, variable temperature surface functionally graded materials (VT-SFGM) with consideration room and gradient are designed. After iterative optimization, convex coating thickness VT-SFGM presents a U-shaped distribution. Under constant condition, strength at same position is reduced by 49.5%. As rises, high area uniform gradually transfers form HV conductor to GND shell. 60°C, maximum VTSFGM decreases 64%....

In complex electromagnetic environments, wireless communication system reliability can be compromised by various types of jamming. To improve in the presence malicious jamming, this paper introduces an anti-jamming power control algorithm for systems, grounded model predictive (MPC) principles. The models Yescommunication as a linear system, using current signal-to-jamming-and-noise ratio (SJNR) to predict future states and transmission over defined time horizon. Only first element optimal...

Lithium-ion battery is the main energy source widely used in many fields. Therefore, it particularly essential for estimating health of lithium-ion accurately, especially important fields such as aerospace, rail transit and satellite. For battery, capacity a index (HI) that best reflects its performance degradation. By capacity, status can be clearly identified. However, there are technical barriers to direct measurement engineering, characteristics capacities batteries have abrupt changes,...

Lithium-ion batteries have been growing in popularity for portable electronics, electric vehicles, aerospace and military devices due to many excellent characteristics. The prognostics health management of lithium-ion are significant. In this paper, a novel mixture model multi-kernel relevance vector machines with dynamic weights (DW-MMKRVM) is proposed estimate the real-time capacity based on indirect indicators. Weights each sub-model DW-MMKRVM keep updating during sequential, online data...

By using high quality image acquisition and multi-layer merge technique, a technique of IC circuitry analysis has been developed successfully applied to more than 50 industrial products in one year. A series in-house designed software ensures the successful rate be up 95% total working time less 2 months for analog/mix-signal ICs any scale typically 10 /spl sim/100K gates counts digital devices. The environment was also featured by multiple language, users accessible, project teamwork...

In the life prediction of lithium-ion batteries based on performance degradation, problem multi-feature can be solved by machine learning. However, selection multiple features and validity input have not been fully solved. Therefore, this paper proposes a method selecting grey relational degree to quantitatively measure correlation between indirect health factors battery capacity, valid as inputs for multi-kernel RVM model. Through comparison with previous methods, we find that proposed in...

Residual life prediction using monitoring data is an important method in reliability engineering. However, the current performance degradation study, selection of characteristics usually selected based on expert experience. In this a grey correlation analysis applied to select as health index products. Further, are analyzed with linear Wiener process model. And model parameters estimated MCMC (Markov Chain Monte Carlo) view Bayes theory. Finally, numerical example concerning remaining...

Measuring the electric field distribution will provide exact information for design and safe operation of electrical devices. A simple but effective technique is developed in this paper to measure transient by fabricating a micro-sized sensor on grounded (GND) electrode. Both parameter selection fabrication are critical ensuring non-intrusive measurement. By experiment, measured fields time domain have exactly same waveforms as those applied AC impulse voltages, their spatial distributions...

This paper offers a simulation study on the application of novel approach to control electric field around basin-type spacer by combining permittivity functionally graded materials ($\varepsilon$-FGM) and superficially nonlinear conductivity (SNCM), namely multi-dimensional functional (MDFM). The distribution $\varepsilon$-FGM is designed iteration optimization algorithm, epoxy/SiC composites with 30 60 phr (parts per hundred) doping contents are assigned as coating two SNCM spacers, SNCM30...

This study discusses the approach of adaptatively regulating surface charge and electric field distributions by nonlinear conductivity materials. Three groups (SNC) spacers, namely SNC30, SNC60 SNC90, were prepared coating epoxy/Al <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> O xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> spacers with epoxy/SiC composites 30, 60 90 phr doping contents. Experimental results show impressive...