The phosphorus enrichment behavior in dephosphorization slag was investigated by modification with Al2O3 the present study. mineral phase of samples were measured microscope, SEM+EDS and XRD. mechanism discussed according to FactSage calculation. results show that mainly existed nC2S–C3P solid solution beneficial phosphorus. content phosphorus-rich increased 5.10% 9.15% 8% 11% addition. With temperature decreases, Ca3(PO4)2 Ca2SiO4 firstly precipitated formed nC2P–C3P solution. addition has...

Abstract Optical frequency combs (OFCs) have evolved into one of the most active areas photonics, underpinning advancements in both fundamental science and commercial contexts. Electro‐optic modulation for OFC generation offers excellent versatility, stability, phase coherence. With rapid progress micro‐nano fabrication techniques, electro‐optic (EOFCs) been realized on many integrated platforms, including silicon insulator (SOI), indium phosphide (InP), lithium niobate (LNOI). These...

Abstract Developing high‐efficiency durable electrocatalysts in wide pH range for water splitting is significant environmentally‐friendly synthesis of renewable hydrogen energy. Herein, a facile method by dealloying designable multicomponent metallic glass precursors reported to synthesize amorphous‐crystalline heterostructured nanoporous high‐entropy alloys (AC‐HEAs) CuAgAuPtPd, CuAgAuIrRu, and CuAgAuPtPdIrRu, heaped up nanocrystalline particles with an average size 2‐3 nm the amorphous...

The rational economic load dispatch can not only save the energy, but also improve efficiency of power systems, so it is important to research problem. However, duo its complex and nonlinear characteristics, difficult solve problem using traditional optimization method. PSO has been successfully applied a wide range applications, in solving continuous problems. Owing good characteristics ergodicity, chaotic particle swarm (CPSO) was presented avoid premature phenomenon PSO, furthermore, tent...

Water of oil paper insulation in transformer will accelerate its ageing, which is the key factor for failures. Therefore, it necessary to estimate water content solid guaranteeing a safety and reliable operation power transformers. The microstructure molecules can be varied by water, affects conductivity polarization properties. Return voltage measurement based on dielectric response theory detect variation properties material. analyze oil-paper detail, describes relationship between...

Dielectric properties of oil-paper insulation transformer are influenced intensively by moisture; therefore, it is imperative to assess integral condition for assuring normal operation power transformers. As a non-destructive diagnostic technique, return voltage measurements have been introduced the assessment water content in pressboard. This paper further investigates possibilities assessing moisture contents method. Field test results performed on several transformers and its...

Moisture and degradation of oil-immersed power transformer dielectric material are the key factors for its failures. Therefore, in this paper moisture content, aging degree their influence on discussed. Chemical analyses can provide direct information parameters, however, most chemical must be performed under laboratory conditions some samples needed. To overcome these disadvantages, response measurements have been introduced state assessment material, especially evaluation water content...

During micro-fluid dispensing process, pressurized air drives fluid materials (such as adhesive, sealant) through a circular tube with micro inner diameter onto substrates. This process is affected by some coupled factors and extremely difficult to develop an accurate physical model. Contrarily, applied model may be more useful effective. In this paper, analysis the decoupling linear of was developed step step, adding variables one nominal model, completed obtained. Experiments on typical...

Combined with an HVDC transmission system closely, the voltage stability of is studied which based on sensitivity analysis method. First, a hybrid calculation method deduced. On basis method, active and reactive power matrix about amplitude several AC important nodes to DC channel calculated. The absorbed calculated under different control modes system, as well mode. Integrated indicators above, operation mode AC/DC measures improve are studied, providing technical reference for safe stable system.

AGC unit selection problem has been getting more attention due to economical operation of the power industry. This is formulated as a constrained nonlinear mixed integer programming with variable regulation capacity. Due including continuous and integral variables, it difficult solve using programming. PSO successfully applied wide range applications, mainly in solving optimization problems. Therefore, this paper presents an improved hybrid algorithm problem. And then novel dynamic inertial...

When disconnector operate capacitive small currents, it will produce strong high frequency transient electromagnetic interference, which cause damage to electronic transformer. In this paper, a dynamic arc model of is established. by using TACS element in ATP-EMTP. Referring the standard GB/T 1985-2014, test circuit switch operation Combining with model, maximum current amplitude interference 576A, voltage 1.8p.u, and up 210kHz. The corresponding experimental established, waveform generated...

Frequency domain spectroscopy (FDS) method based on dielectric response testing techniques is being investigated as potential tools for condition assessment of transformer insulation. It a simple and nondestructive to monitor insulation status transformer. This paper establishes mathematical model with the data frequency solving parameter equivalent circuit, which group nonlinear equations exponential function. difficult solve problem using least square optimization method. The transformed...