Abstract As the global population ages, research on pathogenesis and treatment options for older patients with dementia has become increasingly important. Vascular (VaD), second most frequent type of dementia, is characterized by vascular impairment caused inadequate blood supply to brain. VaD a complex neurological disorder involving multiple cells signaling pathways, its prevention pose clinical challenges significant behavioral implications. Glutamate, abundant amino acid in brain, plays...

A high temperature superconducting magnetic energy storage system (HT-SMES) is constructed using YBCO coated conductor and integrated with a cryogenic sub-cooled LN2. closed loop control algorithm, based on the digital signal processor (DSP) TMS320F2812, proposed 2G HT-SMES to compensate dynamic voltage sag in power systems. simulation experiment for compensation of instantaneous achieved. The circuit built conditioning circuit, DSP controlling conversion SMES unit. Analysis waveforms before...

Single-core Cross-linked Polyethylene (XLPE) cables are commonly used to transmit 3-phase power in long distance transmission and distribution lines. Cross bonding of metal sheaths across phases limits induced currents. Assessing cable condition allows asset managers prevent failure. On-line monitoring Dielectric Loss (DL) indicates the general state insulation. In practice, DL measurement relies on a reference voltage insulation leakage current. Circulating currents, which generated...

A kJ class high temperature superconducting magnetic energy storage system (HTS-SMES) composed of YBCO and BSCCO coils with a cryogenic using sub-cooled LN2 is optimal designed. This SMES applied for the dynamic power fluctuation compensation considering quench protection in system. dual processor combined digital signal (DSP) micro-programmed control unit (MCU) proposed to construct LCL filtered voltage source converter SMES. Based on SVPWM pulse modulation, strategy its DSP programs are...

This paper introduces a novel multi-converter-based unified power quality conditioner (MCB-UPQC). Three optimization methods are proposed based on the traditional UPQC: (1) The shunt converter is substituted with multi-modular parallel converters. Hence, reactive and harmonic currents can be increased greatly, which suitable for low-voltage high-current distribution systems. (2) series converters consist of three H-bridge inverters, each inverters controlled separately. control strategy...

Under the condition where power grid voltage is unbalanced and distorted, dynamic restorer (DVR) used to compensate negative sequence harmonic voltage. In this paper, a novel double closed-loop control strategy presented. The outer loop of controller based on proportional multi-resonant (PMR) controller, while inner current controller. Parameter tuning investigated optimal gain obtained through root locus curve. This method can maximize stability effectively suppress LC resonance at same...

This paper deals with a novel hybrid power electronic transformer(HPET). Different kinds of topologies HPET are discussed and compared. The modelling operating principle is expounded in detail. A detection method based on all pass filter(APF) proposed to detect the voltage sag. design example presented for 10kV/380V, 200kVA HPET. Simulation experiment results verify topology control algorithm this paper.

Grid-connected voltage source converters (GC-VSCs) are used for interfacing the distributed power generation system (DPGS) to utility grid. Performance of current loop is a critical issue these GC-VSCs. Recently, reduced order generalized integrator (ROGI)-based controller proposed, such that AC reference signal positive or negative sequences can be separately tracked without steady-state error, which has advantage less computational burden. However, cross-coupling within ROGI-based would...

Abstract Background Chronic cerebral hypoperfusion‐induced demyelination causes progressive white matter injury, although the pathogenic pathways are unknown. Methods The Single Cell Portal and PanglaoDB databases were used to analyze single‐cell RNA sequencing experiments determine pattern of EAAT3 expression in CNS cells. Immunofluorescence (IF) was detect oligodendrocytes oligodendrocyte progenitor cells (OPCs). levels mouse brains measured using a western blot at various phases...

The tuyere, an integral component of a blast furnace, plays vital role in conveying energy and ensuring stable furnace operation. Given the tuyere's exposure to complex working environment within it is prone breakage failure. Thus, investigating causes tuyere failure crucial. This study employs computational fluid dynamics alongside experimental characterization conduct numerical simulation tuyere. research focuses on comparing velocity temperature fields under various cooling conditions...

This paper presents a multi-channel light-emitting diode (LED) driver with CLL resonant converter. A converter is used in the primary side of transformer to drive LEDs. On secondary transformer, current balance realized capacitors, based on charge principle. No additional magnetic components are used. With converter, zero voltage switching (ZVS) turning-on switches and (ZCS) turning-off diodes simultaneously achieved. The characteristics capacitors analyzed. Parameters elements circuit...

This paper provides a way to enhance the stability of rotor structure generator-motor in design process. To improve accuracy generator-motor, this analyzes mechanical stress and thermal pole-led with different structure. Furthermore, direction is proposed discussed.

To reliably and economically connect active distribution networks access to large-scale dc distributed source or load, a current converter (CSC) based three-terminal power transmission system is proposed in this paper. The adopts CSCs at the two ac sides realize connection hybrid DC/DC for load access. CSC network side voltage side. Firstly, topology of introduced. Then, mathematical model analyzed detail. Based on model, comprehensive control strategy Finally, by applying PSCAD/EMTDC...

The proposed modeling method for electromagnetic transient simulation of PV/storage power stations can iteratively adjust the model parameters related to short-circuit current contribution characteristics generation unit through time domain analysis, so as realize fine analysis near grid-connected point photovoltaic-electrochemical energy storage stations. It is great significance supporting new system and ensure safe stable operation system.

Power conversion system(PCS) is the most important device in energy storage system. Parallel three-phase three-level PWM converter applied PCS for lower switching losses and higher power rating. However, circulating current generated on it. In this paper, modeling of zero-sequence current(ZSCC) first presented. Thus, an optimized modulation method proposed based SVPWM. An average control strategy then presented to suppress current. Furthermore, a model system constructed. Simulation results...

An elastoplastic phase field model was employed for simulations to investigate the influence of external loading on martensitic transformation kinetics in steel. The incorporates and plastic deformation. During simulation process, authenticity is ensured by introducing relevant physical parameters comparing them with experimental data. calculations, loads various magnitudes conditions were considered. analysis discussion conducted concerning volume fraction transition temperature during...

Modular dc solid state transformer (MDCT), which plays an important role in the distribution system, can achieve electrical isolation, voltage conversion and power transmission between different levels. The MDCT uses high frequency to transfer energy, reduce size of but this will generate more switching loss. basic operation principle under quasi square wave modulation strategy was analyzed firstly. On basis, paper proposes a soft-switching scheme effectively loss for system. condition range...