Commutation failure immunity index (CFII) is a useful indicator to quantify the level commutation failures in line commutated converter-based multi-infeed HVDC systems. Instead of using simulation tools which inevitably lead heavy workload and long computation time, analytical expressions 'local CFII' (LCFII) 'concurrent (CCFII) are derived based on minimum extinction angle criteria. Using these expressions, impact system parameters levels inverter side can be determined quickly effectively....

As a primary cause of dementia and death in older people, Alzheimer's disease (AD) has become common problem challenge worldwide. Abnormal accumulation tau proteins the brain is hallmark pathology AD closely related to clinical progression severity cognitive deficits. Here, we found that overexpression phosphatase tensin homolog (PTEN)-induced kinase 1 (PINK1) effectively promoted degradation tau, thereby rescuing neuron loss, synaptic damage, impairments mouse model tauopathy with...

This study aims to predict the economic transition pathway for alternative fuels in accordance with 2023 IMO GHG Strategy goals. The assessment considers impact of fuel on costs (∆COSTFuel,t), carbon emission (∆COSTCO2 eq,t), and ship new/retrofit (∆COSTship). parameters boundary conditions were set based current status trends international shipping industry, as determined from previous research, fuels. results show that 2050, a standardized efficiency 130%, profit will reach its maximum...

Commutation failure is one of the most common failures that may lead to serious consequences in high-voltage direct current (HVdc) systems. Superconducting fault limiters (SFCLs) have been proved effective inhibit commutation failures. In this paper, different installation positions SFCLs are compared through three proposed evaluation indexes. The position between ac and dc systems best performance, at end line performs moderately but costs less. Then, methods for calculating convergence...

AC (alternating current) system backup protection setting calculation is an important basis for ensuring the safe operation of power grids. With increasing integration modular multilevel converter based high voltage direct current (MMC-HVDC) into grids, it has been a big challenge calculation, as MMC-HVDC lacks fault self-clearance capability under pole-to-pole faults. This paper focused on faults analysis calculation. The principles were discussed first according to standard Then, influence...

This paper analyses the current distribution of HTS cable model under fault current. We built simulation and researched different A lot experimental data are obtained to verify results. The shows that former plays an important role large short-circuit results this work will give reference for designing protection cable.

High temperature superconducting (HTS) materials have lower loss, larger transmission capacity, lighter weight, smaller size and less electromagnetic radiation pollution than conventional power cable materials. Thus, HTS been used to make a transmit higher current. If large fault current (25 kA/1 s) passes the itself, distribution variation of will be quite obvious. The outer conductor layer is little that inner layer, former, shield protection layer. reduction passing YBCO film very steep....

In this paper, we proposed and demonstrated a facile process that leverages wax printing technology for fabricating highresolution molds microfluidic devices. Traditionally, devices are made from photolithography-fabricated molds, involving complicated expensive equipment, reagents, highly skilled personnel. The is timeconsuming, hindering the widespread use of However, can directly print hundreds micron-wide lines with certain heights onto smooth substrates, these be used as channels, thus...

Conductor on round core (CORC) cable which was prepared by stacking in parallel High Temperature Superconductor (HTS) tapes with helical layout a flexible former. Based configuration of CORC cable, this paper presents HTS Magnet for 5 MJ class Superconducting Magnetic Energy Storage (SMES) magnet. Mechanical properties due to the stress Lorentz force must be evaluated stable operation magnet large magnets. This mainly analyses hoop strain caused force. According analysis results, method...

This paper claims that, instead of relying on direct fuel and air flowrate measurements, exhaust gaseous emissions analysis should be considered as the standard method for determination time-resolved air—fuel ratio (AFR), in particular petrol powered engines. Various sensitivity parameters are defined maximum possible relative divergences calculated to support above claim. It is proved that obtain with same order accuracy a engine near stoichiometric conditions, resolution instruments used...

Compact strip production hot rolled plate is one of blanks with short process. Owing to low cost and less investment, its tendency replacement cold development in industry. The mechanical property both compact after quenching at different heating rates are investigated. Results showed that the tensile strength increased increase rate, gap narrower narrower. 1393MPa when rate 10 ˚C/s, which can't meet requirement properties stamping parts, while 1587MPa was 100 this result indicated could be...

More and more high temperature superconducting (HTS) devices have been built by employing the current-carrying cable which is made a few coated conductors in parallel. These HTS generally large capacity because of performance current carrying. Therefore, with density becomes key point for application. There are two kinds cable, helical Roebel proposed this paper. Their optimal structure electromagnetic characteristics presented based on finite element analysis method. Two 3D models variable...

An unconventional inchworm stepping actuator based on bionics is presented, which consists of driving unit (PZT stack pump), fluid control (ER fluids valve), actuating mechanism (precision hydraulic cylinder). As a new type precision force/ displacement and positioning system, it inherits the advantages conventional actuators, also has its own remarkable characteristics, such as that can be adjusted precisely through varying working voltage frequency, etc. The actuated jointly by double PZT...

The printed circuit boards (PCBs) are the basis of all electrical and electronic equipment (EEE) thus one most important branches WEEE stream. Present researches mainly concentrate on processes reusing noble metals copper, a great deal nonmetals in PCBs disposed by combustion or filling, which may cause secondary pollution resource-wasting. So this paper, we study how used to produce recycling through adding different adhesives, obtain best formulation working conditions. is that binder...

Extensive application of rigid polyurethane foam leads to a huge amount waste after reaching their useful life. Recycling this can protect the environment effectively. In paper, mechanical recycling was employed in preparation recycled insulation board. The relationship represented between water-soluble PF and aqueous polyethylene wax used thermal conductivity, along with compression performance material. A result better property observed when ratio rubber 15% 3% employed.