Combined heat and power economic dispatch (CHPED) is one of the foremost subjects in operation systems. In this article, a new variant cuckoo search (CS) algorithm, elitist CS (yECS), advanced to tackle CHPED. During optimisation process original as well lots its variants, guidance directions relies merely upon best individual, causing loss other beneficial information further influencing their performance potentials. Therefore, yECS, an mechanism developed fully utilise elite individuals....

In this paper, an improved magnetic equivalent circuit (MEC) model of a coreless axial-flux permanent-magnet synchronous machine (AFPMSM) with printed board (PCB) winding is presented, which considers the curvature effect, fringing leakage flux, and rotor yoke's saturation. The axial air-gap flux density distribution, no-load back electromotive force, inductances, electromagnetic torque are predicted by proposed MEC model. steady-state performances under heavy load, as well dynamic response...

Resonant activation and noise-enhanced stability were observed in an underdamped real physical system, i.e., Josephson tunnel junctions. With a weak sinusoidal driving force applied, the thermal activated escape from potential well underwent resonance-like behavior as function of frequency. The resonance also crucially depended on initial condition system. Numerical simulations showed good agreement with experimental results.

We report the observation of quantum jumps between macroscopic states in a superconducting phase qubit coupled to two-level systems Josephson tunnel junction, and all key features are confirmed experiments. Moreover, can be used calibrate such systems, which believed one main decoherence sources devices.

Transforming a constrained optimization problem (COP) into bi-objective (BOP) is an efficient way to solve the COP. However, how obtain good balance between objective function and constraint violation not easy in BOP. To handle this issue, novel unbiased model proposed, which both functions are equally treated. Furthermore, shown have unique Pareto optimal vector under proper condition, exactly corresponding solution of Moreover, relationship existing biased proposed one analyzed detail. For...

In agricultural robots, trajectory tracking can be affected by disturbances such as road slopes or bumps, leading to sudden changes in path curvature and reduced control accuracy. To address this issue, we propose a servo motor drive method based on an improved Empirical Mode Decomposition (EMD) threshold. A mathematical model integrating the of is established, driving performance analyzed. By detecting speed position motor, specified three-phase current values for are derived. The actual...

Differential evolution (DE) is a kind of simple but powerful evolutionary optimization algorithm with many successful applications. This paper proposed multiobjective differential based on opposite operation. Firstly, in the initialization algorithm, points randomly generated individuals are calculated order to make initial population better. Secondly, operation has also been used for candidate solutions according number nondominated by DE dynamically. In doing so, convergence rate can be...

Important properties to consider in shale-gas evaluation include minerals, total organic content (TOC), brittleness index, minimum closure pressure, fracture pressure and some mechanical rock which can assess the gas potential fracturability for a shale reservoir. We often not have enough measured data completely characterize of interest. Meanwhile, determine relationship among reservoir elastic is important prediction, especially prediction using seismic data. This paper calculated...

Small-signal models of pulse-width modulation (PWM) converters are widely used for analyzing stability and play an important role in converter design control. However, existing small-signal either based on averaged DC behaviors, hence unable to capture frequency responses that faster than the switching frequency, or greatly approximate these high-frequency responses. We address severe limitations by proposing a multiharmonic model provides complete characterization both averages high-order...

The constrained optimization problem (COP) is converted into a biobjective first, and then new memetic differential evolution algorithm with dynamic preference proposed for solving the problem. In algorithm, global search, which uses (DE) as search scheme, guided by novel fitness function based on achievement scalarizing (ASF). constructed reference point weighting vector adjusts dynamically towards different objectives during evolution, in are determined adapting to current population....

The capacitance of a Josephson tunnel junction is an important parameter, which determines its plasma frequency ωp and thus the energy level spacing in quantum regime. When microwave signal at ω applied to current-biased zero-voltage state, escape rate from this state somehow enhanced. enhancement expected go through pronounced maximum when ωp=ω. Making use such generated resonant activation thermal regime, we have developed time-resolved measurement scheme for determining with uncertainty...

A convex risk measure called weighted expected shortfall (briefly denoted as WES (Chen and Yang, 2011)) is adopted the measure. This can reflect reasonable in stock markets. Then a portfolio optimization model based on this set up. Furthermore, genetic algorithm proposed for model. At last, simulations are made randomly chosen ten stocks 60 days (during January 2, 2014 to April 2014) from Wind database (CFD) Shenzhen Stock Exchange, results indicate that effective.

In this paper, fault-tolerant attitude tracking control problem is investigated for multiple spacecraft formation flying system with external disturbance, actuator saturation, and faults. A quaternion-based adaptive law proposed based on input normalized neural network. The desired nonlinear smooth function approximated by using network an learning algorithm, no prior knowledge about dynamics required. Meanwhile, in order to guarantee that the output of used controller bounded corresponding...

The loop finder (LF) analysis is a newly developed method for automatic identification and full chip stability analysis. It allows designers to find local potentially problematic return loops in their analog circuits. Node impedance transfer functions pole-residue format are utilized generate second-order continuous-time systems that approximate the loops. This was implemented our in-house Spice-like simulator has been very helpful identifying instability problems.

To achieve the exact grabbing operation of forming tray in gantry space during process cigarette filters, we propose a system using machine vision for precise positioning centre tray. In this system, multiple stacks trays do not require extra time accurate manual stacking, these can be put into directly from factory stacking state, which improves applicability and accuracy system. Combined with PLC as control equipped motion module three-axis servo-driven mechanism, realize movement target...

Summary Fractures play important role in oil exploration and production. If we assume fractured shale reservoirs as simpler models, such transverse isotropy, are often insufficient misleading. In this paper, develop a new method to predict fracture intensity for the orthorhombic anisotropy media. We separate linearized reflection coefficient expression of OA media into different parts considering whether they influenced by azimuth investigate sensitive one about from them. Then attribute...

Josephson junction devices are good candidates for quantum computation. A large energy splitting was observed in the spectroscopy of a superconducting junction. The presence critical current fluctuation near indicated coupling between and two-level system. Furthermore, we find that this is microwave dependent. It only appears at certain frequency. This relation suggested decoherence qubits influenced by necessary computing operations.

This paper puts forward a distributed dynamic event-triggered strategy to solve the consensus problem of linear multi-agent systems under directed graphs. Based on triggering function, each agent can reach asymptotically. Different from existing static schemes, proposed scheme, where an internal variable is involved, results in larger inter-event times and also leads less communication overheads among agents, which conducive guaranteeing that Zeno behavior excluded for agent. In addition,...

Differential Evolution(DE) is a kind of simple but powerful evolutionary optimization algorithm with many successful applications. However, it has some weaknesses, especially the slow convergence speed because weak local search ability in its stochastic search. To overcome drawback, we first employ orthogonal design method quantization technique to generate initial population, and then incorporate descent direction traditional into DE improve process solving multiobjective problems(MOPs),...

This paper presents a digital control strategy for Input-Parallel Output-Parallel (IPOP) DC/DC converters system. The IPOP system is based on two phase-shifted full-bridge (PS-FB) whose output current not equally shared due to parameter differences of each module. objective obtain sharing. Small signal model built analyze the stability. Effectiveness verified by simulation and experiment results.

Concerning the diversity of packing filter rods' defect type and low efficiency traditional artificial detection methods, in order to detect more effectively, an approach rods based on visual saliency was proposed. The images were utilized be clipped high quality cut, then extract various effective features compute salient value. different types maps fused final finish detection. Four classical models are used And these compared image test database built by us. According result, AC has...

To improve the performance of 6-DOF platform, this paper proposes a novel method developed from Narendra Model Reference Adaptive Control (Narendra MRAC) and PID. MRAC is used as inner control circuit introduces PD link to initial stage control. The PID outer dynamic characteristic system, eliminates steady state error. With strongly coupled, nonlinear strong interference characteristics platform system driven by electric cylinders, single channel model established. Then, implemented...

Constrained optimization problems (COPs) are converted into a bi-objective problem first, and novel fitness function based on achievement scalarizing (ASF) is presented. The adopts the valuable properties of ASF can measure merits individuals by weighting distance from ndividuals to reference point, where point vector reflect preference decision makers. In initial stage evolution, main should be put in generating more feasible solutions, later improving objective function. For this purpose,...