This paper proposes a new support vector machine (SVM) optimization scheme based on an improved chaotic fly algorithm (FOA) with mutation strategy to simultaneously perform parameter setting turning for the SVM and feature selection. In FOA, particle initializes fruit swarm location replaces expression of distance find food source. However, proposed uses two distinct generative mechanisms sources at osphresis phase, allowing procedure search optimal solution in both whole space within local...

The present study delved into the effect of impactor diameter on low velocity impact response and damage characteristics CFRP. Moreover, phased array ultrasonic technique (PAUT) was adopted to identify damages based double-sided scanning. Low-velocity tests were carried out using three hemispherical impactors with different diameters. relationship diameters analyzed by C-scans S-scans, combined parameters. Subsequently, assessed in terms dent depth, delamination area extension shape via...

Emission controls that provide incentives for maximizing reductions in emissions of ozone precursors on days when concentrations are highest have the potential to be cost-effective management strategies. Conventional prescriptive or cap-and-trade programs consider all similarly regardless they occur, despite fact contributions formation may vary. In contrast, a time-differentiated approach targets forecasted high without imposition additional costs lower days. This work examines simulations...

When an integral pressurized water reactor is operated under low power conditions, once-through steam generator group operation strategy applied. However, will cause nonuniform coolant flow distribution at the core inlet and lower plenum. To help mix more uniformly, a mixing chamber (FMC) has been designed. In this paper, computational fluid dynamics methods have used to investigate by effect of FMC. Velocity temperature characteristics different conditions optimized FMC configuration...

Abstract In this paper, a three-dimensional model for the dynamic analysis of flywheel based on finite element method is presented. The static structure provides stress and strain distribution cloud charts. modal basis due to its ability obtain natural frequencies vibration–made vectors first 10 orders. results show main faults are attrition cracks, while also indicating locations patterns faults. harmonic response simulation was performed gain vibration under operation. we present...

The multipath spread in underwater acoustic channels is severe and, therefore, when the symbol rate of time reversal (TR) communication using single-carrier (SC) modulation high, large intersymbol interference (ISI) span caused by reduces performance TR process and needs to be removed long adaptive equalizer as post-processor. In this paper, a method filtered multitone (FMT) proposed order reduce residual ISI processed signal TR. method, FMT exploited modulate information symbols onto...

Qinshan nuclear power plant is the first large Chinese-designed station based on pressurized water reactor, and second generation main stream active safety injection system adopted for plant. In this paper, a novel passive (PSIS) has been proposed ocean-based Phase One to replace original one. The PSIS contains high-pressure, medium-pressure, lower-pressure systems, two-stage automatic depressurization system. To evaluate performance, small-break LOCA investigated using RELAP5. Various break...

Previous research has shown that the inclined condition an impact on natural circulation (natural circulation) mode operation of Floating Nuclear Power Plant (FNPP) mounted movable marine platform. Due to its compact structure, small volume, strong maneuverability, Integral Pressurized Water Reactor (IPWR) is adopted as reactor in general. The OTSGs IPWR are symmetrically arranged annular region between vessel and core support barrel this paper. Therefore, many parallel loops built primary...

Filtered multitone (FMT) modulation divides the communication band into several subbands to shorten span of symbols affected by multipath in underwater acoustic (UWA) communications. However, there is still intersymbol interference (ISI) each subband FMT degrading performance. Therefore, ISI suppression techniques must be applied UWA The performance traditional adaptive equalization methods often exploited communications limited when effect spans tens or large constellation sizes are used....

A model to investigate the envelope detection of vestigial sideband TV signals with nonideal carrier reinsertion is presented. For a typical television test waveform, amplitude and phase distortions at output detector are calculated as function reinserted phase. given specifications in terms differential gains phase, relation between minimum permitted maximum error established. This technique permits circuit design without need for large-scale testing.< <ETX...

Purpose The paper aims to propose an innovative two-stage decision model address the sustainable-resilient supplier selection and order allocation (SSOA) problem in single-valued neutrosophic (SVN) environment. Design/methodology/approach First, sustainable resilient performances of suppliers are evaluated by proposed integrated SVN-base-criterion method (BCM)-an acronym Portuguese interactive multi-criteria decision-making (TODIM) method, with consideration uncertainty process. Then, a...

Underwater acoustic (UWA) sensor networks demand high-rate communications with high reliability between nodes for massive data transmission. Filtered multitone (FMT) is an attractive multicarrier technique used in UWA communications, and can obviously shorten the span of intersymbol interference (ISI) spectral efficiency low frequency offset sensitivity by dividing communication band into several separated wide sub-bands without guard bands. The joint receive diversity adaptive equalization...

In nuclear reactor system research, the multiscale coupled thermal-hydraulic (T-H) code and CFD is one of most prevalent research areas, it could help improve simulation fidelity optimize design. Additionally, a new idea known as function fitting method (FFM) for coupling parameter distribution has been newly proposed exchanging data on interface, which uses math equations to present velocity characteristics at interface. This error numerical instability. To verify validate abovementioned...

Under the premise of determined transportation tasks and collaboration assigned, this paper defines four factors that influence distribution collaborative logistics profits: external providers competing risks, uncertainty transport risks information sharing satisfaction between internal providers, established a profit model uses an improved correction factor Shapley value. Finally, we use example to prove rationality validity model, thereby protecting smooth coordination sustainable development.