In recent years, with rapid urbanization and development of tourism, historic cultural areas have become characterized by strong vitality. However, a dilemma has arisen concerning their over-commercialization. this study, 17 Chinese areas, surroundings within radius 1.5 km, were selected for research. Then, the spatial structure population agglomeration associated points interest (POIs), including commercial service POIs tourist attraction POIs, analyzed, resulting in five principal...

The study of fiber arrangement in a sliver is great significance for predicting yarn quality, optimizing spinning processes, and promoting innovations technology. At present, most models are based on the ideal sliver, which not connected with irregularity characteristics actual so that simulated very different from sliver. In this study, simple, universal, more accurate model proposed. simulation, irregular left ends fibers further considered; related to total structural addition, accuracy...

Double apron drafting is the general form in front zone of ring spinning frame. In double system, top and bottom an elastic tensor gauge, which can better control movement floating fibers improve yarn quality. order to investigate quantitatively influence on fiber quality differences acceleration point distribution, irregularity strength spun by drafting, single simple roller under different process conditions were compared. Compared with effectively zone. With increase length, difference...

AbstractIn order to study the effect of orifice angle vortex tube on yarn forming in jet spinning, eight levels nozzle are designed, from 40° 65°, and corresponding three-dimensional computational fluid dynamics (CFD) models established conduct numerical simulation airflow nozzle. Through analysis simulation, pressure velocity distribution made clear which provides reference for future design tube. Simulation results show that when is around 50°, state within has a large negative with...

The application of high speed air flow in the textile field represents frontier development direction this field. However, coupling mechanism between and fiber is extremely complicated which greatly limits new technologies. For reason, research study intended to focus on common cutting-edge basic scientific problem air-flow-fiber mechanism, vortex spinning technology taken as a breakthrough point for research. Three-dimensional numerical models nozzle free-end were established. hybrid grids...

Background: The mechanics of heat and mass transfer via nanofluid flow across many media are currently being discussed. “Nanofluids” fluids that include highly heat-conductive nanoparticles, they essential for resolving engineering problems. Under the effects activation energy, thermal radiation, motile microorganisms, process through steady crosses over stretched surfaces in this scenario. Methodology: For mathematical evaluation, system partial differential equations (PDEs) is used to...

Three-dimensional numerical simulation of the airflow characteristics during whole vortex spinning process, including initial state yarn drawing-in process and normal stable were obtained analyzed. Spinning experiments, with aid a scanning electron microscope, adopted to verify results simulation. The show that turbulence phenomenon in is much more obvious than process; air streamlines move orderly which will produce strong suction force be conducive drawing fiber bundle into nozzle...

In order to optimize the nozzle structure of vortex spinning, components, such as guided body, tube and cone were combined conduct spinning experiments, which provides a certain reference for setting parameters. Viscose fiber was used in this study; weight viscose sliver is 3.2 g/m, with length × fineness 39 mm 1.23 dtex. The results showed that optimum parameters are follows: spiral angle body: 35°; needle length: 1 mm; orifice tube: 50°; diameter: 0.4 number: 5; tip conical degree 10°;...

This letter combines the multi-mode representations extracted by bidimensional empirical mode decomposition (BEMD) and deep residual networks (ResNet) for synthetic aperture radar (SAR) target recognition. Bidimensional intrinsic functions (BIMFs) are generated BEMD to describe characteristics in SAR images. A special ResNet is designed trained each layer of BIMFs. The decisions from different BIMFs linearly fused using a random weight matrix. Typical test scenarios on Moving Stationary...

Purpose The purpose of this paper is to predict the effect bra pad specifications on breast deformation during jumping using a finite element (FE) method. Breast key concern for women exercise and can be effectively controlled with sports bras. In most studies, breasts when wearing measured motion capture devices judge their effectiveness. However, operation such highly complex time-consuming. Computer-aided technology an efficient way simulate these experiments. Design/methodology/approach...

In this paper, a computational fluid dynamics model has been established and three-dimensional numerical simulation of the flow characteristics airflow in vortex spinning nozzle carried out. A realizable k-ɛ is used to simulate turbulence nozzle. Unstructured tetrahedral grids which have good adaptability complex boundaries are paper mesh region. The field solved obtained. results show that principle determined by pressure distribution airflow. can be divided into external internal areas,...

Vortex spinning technology adopts a high-speed swirling airflow to rotate the fibers with open-ends form yarn real twists. The behavior within nozzle has great effect on yarn-formation process. In this study, three-dimensional calculation model and corresponding region were established enable numerical calculation; behavior—pressure, velocity, turbulent field, streamline of airflow—was investigated in presence fiber bundles vortex nozzle. Hybrid hexahedral/tetrahedral control volumes...

In order to improve the Resource Recommendation and sharing ability of mobile library, an intelligent optimization model Mobile Library Service Based on digital twin technology is proposed. Build association rule feature distribution set library resource recommendation service, carry out text information retrieval in process sharing, semantic correlation registration according preference reading user object, establish data object for block processing, analyze reader preference. Complete...

In this paper, we have taken review of certain topological characteristics subdivision and the line graph Kragujevac tree. A tree is denoted by <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1"> <mi>K</mi> </math> , id="M2"> <mo>∈</mo> <msub> <mrow> <mtext>Kg</mtext> </mrow> <mi>q</mi> <mo>=</mo> <mi>r</mi> <mfenced open="(" close=")" separators="|"> <mn>2</mn> <mi>t</mi> <mo>+</mo> <mn>1</mn> </mfenced> <mo>,</mo> </msub> with order id="M3"> size id="M4"> respectively. We computed...

Solution blowing (SB) is a widely reported technology that can be used to fabricate fibers at the micro- and nanoscale. To reveal fibrous web formation mechanism in SB, we improved our previous melt (MB) model predict structures. Then, fabricated two samples simulated same number of virtual computer verify model. Thereafter, measured structural parameters including fiber diameter, orientation, basis weight, pore size. Our provides good prediction orientation weight. However, predicted...

Basis weight distribution of melt-blown fibrous web is attracting considerable interest because it directly affects the application performance nonwovens. strongly determined by air velocity on top surface collector. However, how mentioned basis still unknown. Measurement two distributions first step to investigate influence mechanism. Thus, this work measures collector under different processing conditions. Then fabricated same After fabrication, analyzed using image analysis method. The...

It was well known that the human body would produce an uncomfortable sensation when fabric exerted a certain amount of pressure irritation on skin. The amygdala had long been thought to be source negative emotion perception. However, up now, brain signal changes in evoked by skin exposure not known.In this work, series gradually increasing contact stimulus from boneless corsets repeatedly applied body's waist and abdomen, technology functional magnetic resonance imaging (fMRI) adopted detect...

The physical properties of fabric causing an uncomfortable tactile perception under certain clothing pressure has always been a difficult problem in the field comfort research. According to large number works literature, amygdala was recognized as key brain region for negative perceived emotions. In order investigate factors signal changes region, functional magnetic resonance imaging used monitor and its anatomical sub-brain same degree compression stimulation from several different...

In order to improve the library's ability of cross-platform information retrieval and data scheduling distribution, a library system based on digital twin technology is designed. Using warehouse decision support source structured query methods, spectral characteristics Library resources are extracted. method Hadoop parallel loading, operation divided into decision-making data, computing resource pool loading data. A fusion feature matching model established, channels allocated through...