A conceptual design of a liquid hydrogen FPSO was developed in this research, and its hull dimensions were optimized under the environment at Donghae gas field South Korea. During stage, process production, storage, offloading studied, topside layouts for proposed. The capacities each module determined based on operation scenario. corresponding required areas weight estimated from literature review data ongoing project (Kang, 2013). presented by multi-objective evolutionary algorithm (MOEA)...

This study evaluated the filtration performance and energy consumption of three different reverse osmosis (RO) membranes (ESPA2-LD, RE4040-BE, TMG10D) for treating semiconductor wastewater. A ceramic membrane combined with ozone RO pre-treatment influence injection on efficiency were investigated. flat-sheet comprising Al2O3/SiO2-ZrO2 was used to treat real synthetic wastewater as feed water. The deionized water (DI) permeabilities 144.6, 94.22, 156.6 LMH/bar, respectively. microfiltration...

In this study, hull dimensions of an FPSO were optimized to maximize its operability at Brazil field. contrast with the previous works which have used simplified models evaluate some indicators related stability and hydrodynamic performances FPSOs for own optimal design, we developed a generic compartment modeler sophisticated calculation modules. With aid tools, optimization was performed initial originally designed west Africa The results indicated relative importance compared dimensioning...

Appropriate cleaning methods are essential to ensure the continuous use of membranes, however, research on suitable for Gravity-driven membrane (GDMs) remains insufficient. To remove contaminants accumulated surface GDM modules, open slot and non-slot modules were designed manufactured. These compared their filtration performance contaminant removal efficiency through computational fluid dynamics simulations experiments using influent from wastewater treatment plants (WWTP). While flow...

The purpose of this study is to examine a method traffic congestion data collection using scanned high resolution panchromatic imagery acquired from satellite. existing monitoring systems including manual and automatic vehicle recording technologies have several limitations in terms accuracy spatial coverage ranges. In paper, information achieved by frequency analysis techniques the segmented bridge and/or road images. Especially, simulated digital images fast Fourier transform (FFT) applied...

In this paper, we propose a new fast spatiotemporal denoising scheme. The noise removal is achieved hierarchically in multi-resolution framework which combined with image registration and temporal bilateral filtering. proposed scheme generates satisfactory results without ghost-artifact it requires much lower computational complexity compared other methods.

This paper presents a ghosts-free pseudo-multiframe (MF) high dynamic range (HDR) algorithm inputting real on-site multiple exposures. To this end, first set of synthetic exposures are generated by mapping reference exposure with onlinemodeled brightness transfer functions (BTFs), which determined through histogram matching from the to other Such allows conventional image alignment and ghost removal procedures for MF HDR be unnecessary. Particularly, proposed method can provide more...

In this study, a series of model tests was performed and the effect heading control on offloading operability side-by-side moored vessels in multidirectional environments investigated. During tests, hawser tensions, fender loads, relative motions between two were focused, which are key factors defining operability. Basically, is designed to maintain FLNG (LNG FPSO)’s at wind wave swell. several angles selected investigate impact operability, includes aligned with swell wave. The loading...

In order to achieve a good and competitive FPSO design, the building cost motion performances are two most critical conflicting KPIs be considered. this study, author's previous work (Lee, et al., 2021) on optimization of an FPSO's hull dimensions with 1800 MBBLs storage capacity at Brazil field was extended using multi-objective parametric steel weight operability which closely related operational during lifetime, respectively. For purpose more realistic practical constraints crew comfort...

Chlorination is the preferred method to control biofouling in a power plant cooling system due its comparative effectiveness and low cost. If located coastal area, chlorine can be electrochemically generated in-situ using seawater, which called electro-chlorination; this approach has several advantages including fewer harmful chlorination byproducts no need for storage. Nonetheless, electrochemical process still infancy practice. In study, parallel first-order kinetics was applied simulate...

A fast spatiotemporal denoising algorithm for mobile devices is presented. The noise removal achieved hierarchically in a multi-resolution framework which combined with image registration and temporal bilateral filtering. In particular filtering are designed to reduce computing complexity memory bandwidth requirement while maintaining the quality of results. proposed implemented on retail camera products coarse-grained reconfigurable processor embedded. It confirmed that processing time 2.9...

Human detection technologies are widely used in smart homes and autonomous vehicles. However, order to detect human, vehicle researchers have a high-resolution LIDAR home applied camera with narrow range. In this paper, we propose novel method using low-cost low-resolution that can human fast precisely without complex learning algorithm additional devices. other words, be distinguished from objects by new characteristics function which is empirically extracted the of human. addition,...