A Novel Aquila Optimizer Based PV Array Reconfiguration Scheme to Generate Maximum Energy under Partial Shading Condition

This paper develops a real-time PV arrays maximum power harvesting scheme under partial shading condition(PSC)by reconfiguring PV arrays using Aquila optimizer(AO).AO is based on the natural behaviors of Aquila in capturing prey,which can choose the best hunting mechanism ingeniously and quickly by balancing the local exploitation and global exploration via four hunting methods of Aquila:choosing the searching area through high soar with the vertical stoop,exploring in different searching spaces through contour flight with quick glide attack,exploiting in convergence searching space through low flight with slow attack,and swooping through walk and grabbing prey.In general,PV arrays reconfiguration is a problem of discrete optimization,thus a series of discrete operations are adopted in AO to enhance its optimization performance.Simulation results based on 10 cases under PSCs show that the mismatched power loss obtained by AO is the smallest compared with genetic algorithm,particle swarm optimization,ant colony algorithm,grasshopper optimization algorithm,and butterfly optimization algorithm,which reduced by 4.34%against butterfly optimization algorithm.

Peak-Shaving of the Oxy-Fuel Power Plant Coupled with Liquid O_(2)Storage

Integrating a high proportion of intermittent renewable energy provides a solution for the higher peak-shaving capacity of coal-fired power plants.Oxy-fuel combustion is one of the most promising carbon reduction technologies for coal-fired power plants.This study has proposed a novel oxy-fuel power plant that is coupled with both liquid O_(2)storage and cold energy recovery systems in order to adapt to the peak-shaving requirements.The liquid O_(2)storage system uses cheap valley electricity to produce liquid O_(2)for a later use in the peak period to enhance the peak-shaving capacity.Meanwhile,the cold energy recovery system has been introduced to recover the physical latent energy during the phase change of liquid O_(2)to increase the power generation in the peak period.Technical economies of three power plants,i.e.a 330 MW(e)oxy-fuel power plant as reference(Case 1),the same power plant coupled with only liquid O_(2)storage system(Case 2),and the same power plant coupled with both liquid O_(2)storage and cold energy recovery systems(Case 3),have been analyzed and compared.Thermodynamic performance analysis indicates that the peaking capacity of Case 3 can reach the range of 106.03 to 294.22 MW(e),and the maximum peak-shaving coefficient can be as high as 2.77.Exergy analysis demonstrates that the gross exergy efficiency of Cases 2 and 3 reaches 32.18%and 33.57%,respectively,in the peak period,which are significantly higher than that of 26.70%in Case 1.Economic analysis shows that through selling the liquid O_(2)and liquid CO_(2),combined with carbon trading,the levelized cost of electricity(LCOE)of the three cases have been greatly reduced,with the lowest one of 30.90 USD/MWh shown in Case 3.For a comprehensive consideration,Case 3 can be considered a future reference of oxy-fuel power plant with the best thermodynamic and economic performance.

Effects of Mn-doping on the structure and electrical properties of Sm-PMN-PT piezoceramics

MnO_(2)-modified Pb_(0.9625)Sm_(0.025)(Mg_(1/3)Nb_(2/3))_(0.71)Ti_(0.2)9O_(3) ceramics were prepared via a solid-state reaction approach.Results of detailed characterizations revealed that the addition of MnO_(2) has influence on the grain size,and all samples exhibit a pure perovskite structure.As the content of manganese increases,the volume of tetragonal phase increases.The ceramics with 1.5 mol.%MnO_(2) show a high electro-strain of 0.151%at 2 kV/mm.Therefore,this study provides a new insight into the role of MnO_(2) addition in tailoring the electrical properties of the Sm-PMN-PT ceramics by acceptor doping.

Bioresponsive nanogated ensemble based on structure-switchable aptamer directed assembly and disassembly of gold nanoparticles from mesoporous silica supports

By taking advantage of recent advances in aptamer biology and nanotechnology, we developed a general approach for the design and fabrication of bioresponsive controlled delivery systems. It utilized the structure-switchable aptamer directed assembly and disassembly of gold nanoparticles from mesoporous silica supports, which enables the control of cargo release from the inside of the mesoporous nanoparticles specifically in the presence of target molecule.

A novel study of sulfur-absorption via samarium-doped cerium sorbent at high temperature

Sulfides existing in many gas mixtures of high temperature cases have a negative effect on various industrial applications.In this study,we present samarium-doped cerium(SDC) sorbent to remove H2 S at high temperature.Compared with pure CeO2,the SDC sorbent shows excellent ability in sulfur removal because of the positive effect of the doping of Sm.The H2 has a negative influence on sulfidation of the SDC sorbent and significantly shortens the breakthrough time,hence breakthrough sulfur capacity(BSC).The carbon monoxide present in the feed gas has no obvious effect on the sulfur-removal performance,A suitable samarium loading in SDC leads to an optimum interaction between metal oxide species and the surface oxygen vacancies,which results in an optimal adsorbed activity of reduced gas(H2,H2 S) and hence desulphurization performance.In addition,the SDC sorbents have a good regenerated ability by a simple calcination process.

Structure Design of the Mobile Cutting Machine Tool Based on Pro / Engineer

In order to solve the existing problems of current metal cutting equipment,combined with the development situation of metal cutting industry in China,on this basis,a design can realize multi-shaped metal cutting machine tool. Introduces the working principle of the machine tool,the structure and parameters of the main component,and the establishment of the model by using the 3D modeling software Pro / Engineer（ Pro / E）;through listing the advantages of the mobile machine,shown that the metal machine tool has the structural characteristics of mobile,semi automated,can improve the cutting precision,increase cutting efficiency,and the utility market has certain value. It has guiding significance for the further study and the potential applications of the mobile cutting machine tool.