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Tytuł:
Evaluation of geometrical influence on the hydrodynamic characteristics and power absorption of vertical axisymmetric Wave Energy Converters in irregular waves
Autorzy:
Zhang, Wanchao
Zhu, Yang
Liu, Shuxu
Wang, Jianhua
Zhang, Wentian
Powiązania:
https://bibliotekanauki.pl/articles/32920981.pdf
Data publikacji:
2023
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
vertical axisymmetric
ring-shaped stepped surface
boundary approximation
constringent
geometrical shape
Opis:
To obtain the mechanical energy of waves from arbitrary directions, the vibration absorbers of wave energy converters (WEC) are usually vertically axisymmetric. In such case, the wave-body interaction hydrodynamics is an essential research topic to obtain high-efficiency wave energy. In this paper, a semi-analytical method of decomposing the complex axisymmetric boundary into several ring-shaped stepped surfaces based upon the boundary approximation method (BAM) is introduced and examined. The hydrodynamic loads and parameters, such as the wave excitation forces, added mass and radiation damping of the vertical axisymmetric oscillating buoys, can then be achieved by using the new boundary discretisation method. The calculations of the wave forces and hydrodynamic coefficients show good convergence with the number of discretisation increases. Comparison between the constringent results and the results of the conventional method also verifies the feasibility of the method. Then, simulations and comparisons of the hydrodynamic forces, motions and wave power conversions of the buoys with series draught and displacement ratios in regular and irregular waves are conducted. The calculation results show that the geometrical shape has a great effect on the hydrodynamic and wave power conversion performance of the absorber. In regular waves, though the concave buoy has the lowest wave conversion efficiency, it has the largest frequency bandwidth for a given draught ratio, while in irregular waves, for a given draught ratio, the truncated cylindrical buoy has the best wave power conversion, and for a given displacement of the buoy, the concave buoy shows the best wave power conversion ability.
Źródło:
Polish Maritime Research; 2023, 2; 130-145
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exploration on sustainable new infrastructure green development pattern: coupling coordination measurement and evaluation of China’s new infrastructure investment intensity and green technology innovation
Autorzy:
Yang, Simin
Zhu, Kunjie
Powiązania:
https://bibliotekanauki.pl/articles/27311575.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
infrastructure investment
green technology
innovation
green development
coupling coordination degree model
environmental pollution
Opis:
In the context of China’s new infrastructure construction developing rapidly, this paper explores the sustainable new infrastructure green development pattern. We establish qualitative and quantitative indicators for green technology innovation (GTI) at both the societal macro level and enterprise micro level, capturing the multidimensional nature of China’s green innovation dynamic. Additionally, we create an indicator system for China’s new infrastructure investment intensity (NTI) across three areas: information infrastructure, integration infrastructure, and innovation infra-structure. Using provincial panel data from 2010 to 2020, we construct a coupling coordination degree model (CCDM) to examine the level of coordination between NTI and GTI. Our findings reveal that: the degree of coordination between NTI and GTI follows a U-shaped curve, with both subsystems remaining far from highly coordinated during rapid development; the coupling level of NTI and GTI in China is currently at a near dissonance level overall; the degree of coupling and coordination between NTI and GTI is mainly influenced by policies, and the coupling level is higher on the enterprise side than on the societal side; the two parameters (α-NTI and β-GTI) widely used in prior studies have less of an effect on the coordinated coupling system than other factors considered herein.
Źródło:
Archives of Environmental Protection; 2023, 49, 3; 3--15
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie technologii symulacji do oceny niezawodności sieci typu ad hoc
Application of simulation technology in reliability evaluation of ad hoc networks
Autorzy:
Yang, Ch.
Zhu., Z.
Huang, W.
Powiązania:
https://bibliotekanauki.pl/articles/301047.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
sieć ad hoc
symulacja niezawodności
ocena niezawodności
ad hoc networks
reliability simulation
reliability evaluation
Opis:
Ocena niezawodności sieci Ad Hoc przy użyciu technik analitycznych zazwyczaj wymaga wielu założeń. Dlatego też techniki analityczne nie są w stanie uwzględnić wielu czynników stochastycznych charakteryzujących sieci tego typu. Ostatnio symulacja stała się popularnym podejściem do oceny niezawodności sieci Ad Hoc. W niniejszym artykule przedstawiono scenariusze symulacji i omówiono proces projektowania modeli symulacji do oceny niezawodności sieci Ad Hoc. Omówiono również kierunki przyszłych badań.
Reliability evaluation of Ad Hoc networks using analytical techniques usually requires many assumptions. Thus, analytical techniques are unable to consider many stochastic factors of the networks. Simulation has become a popular approach for evaluating the reliability of Ad Hoc networks. This paper introduces simulation scenarios and discusses simulation model design for reliability evaluation of Ad Hoc network. Future research directions are also discussed.
Źródło:
Eksploatacja i Niezawodność; 2010, 2; 27-30
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation into the Strength Properties of Plain Cotton Fabrics after Water Immersion for Upcycling Textiles
Autorzy:
Yang, Chen
Lin, Yanping
Zhu, Chunyan
Powiązania:
https://bibliotekanauki.pl/articles/24200973.pdf
Data publikacji:
2023
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
upcycling
cotton stock fabric
water immersion
strength properties
Opis:
This study utilized SEM to examine the fiber structure of cotton stock fabrics and tested their durability based on ISO standards. Two types of cotton stock fabrics were evaluated: natural-colored (162 cm width, 120.8 g/m2 weight, 281/10 in × 252/10 in density) and black-colored (157 cm width, 136.1 g/m2 weight, 482/10 in × 210/10 in density). Prolonged water immersion caused surface yarns to loosen, fibers to expand, and the cross-sectional area to increase. Residual pulp and impurities on the fabric adhered to fibers. After 27 days, fiber looseness peaked, leading to complete breakdown after 30 days. Natural-colored fabric experienced significant weft strength loss within 12 days, while black fabric showed slightly higher weft strength loss after 36 days. Color changes were prominent in natural-colored fabric during the initial 21 days, while black fabric displayed noticeable changes after 12 days of immersion.
Źródło:
Fibres & Textiles in Eastern Europe; 2023, 31, 3; 46--55
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Short-term load prediction model combining FEW and IHS algorithm
Autorzy:
Yu, Mingxing
Zhu, Jiazheng
Yang, Li
Powiązania:
https://bibliotekanauki.pl/articles/141740.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
evaluation criteria
exponential fuzzy time series
fitness function
improved harmony search algorithms
load forecasting
optimal interval length
Opis:
:Accurate prediction of power load plays a crucial role in the power industry and provides economic operation decisions for the power operation department. Due to the unpredictability and periodicity of power load, an improved method to deal with complex nonlinear relation was adopted, and a short-term load forecasting model combining FEW (fuzzy exponential weighting) and IHS (improved harmonic search) algorithms was proposed. Firstly, the domain space was defined, the harmony memory base was initialized, and the fuzzy logic relation was identified. Then the optimal interval length was calculated using the training sample data, and local and global optimum were updated by optimization criteria and judging criteria. Finally, the optimized parameters obtained by an IHS algorithm were applied to the FEW model and the load data of the Huludao region (2013) in Northeast China in May. The accuracy of the proposed model was verified using an evaluation criterion as the fitness function. The results of error analysis show that the model can effectively predict short-term power load data and has high stability and accuracy, which provides a reference for application of short-term prediction in other industrial fields.
Źródło:
Archives of Electrical Engineering; 2019, 68, 4; 907-923
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On existence of shape optimization for a p-Laplacian equation over a class of open domains
Autorzy:
Guo, Bao-Zhu.
Yang, D. H.
Powiązania:
https://bibliotekanauki.pl/articles/206462.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
Laplacian
shape optimization
existence
Opis:
In this paper, we introduce four new classes of open sets in general Euclidean space RN. It is shown that every such class of open sets is compact under the Hausdorff distance. The result is applied to a shape optimization problem of p-Laplacian equation. The existence of the optimal solution is presented.
Źródło:
Control and Cybernetics; 2014, 43, 1; 15-31
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The ground state structures and magnetic properties of ZrₙNi (n=1-9) clusters from first principles calculation
Autorzy:
Zhang, Y.
Zhu, Z.
Zhou, X.
Yang, J.
Zhu, Y.
Powiązania:
https://bibliotekanauki.pl/articles/1054889.pdf
Data publikacji:
2017-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
first-principles calculations
ZrₙNi clusters
the geometric structure of balance
stability and magnetic properties
Opis:
The ground state structures and magnetic properties of ZrₙNi (n = 1-9) clusters are studied by using first principles calculation. Firstly, we find the ground state configurations of ZrₙNi (n = 1-9) clusters. Secondly, the magic clusters (Zr₂Ni and Zr₇Ni) of ZrₙNi clusters are found by the comparisons of average binding energies, the second-order energy difference and energy gaps between the highest occupied orbital and the lowest unoccupied orbital of the ground state of ZrₙNi clusters. Thirdly, the calculated results show that magnetic moment of ZrₙNi (n = 1-2) clusters is 4 μ_{B}; however, the magnetic moment of ZrₙNi clusters is about 2 μ_{B} for n = 3-9 (exception for n = 7). Finally, it is found that the magnetic moment of ZrₙNi cluster mainly comes from Zr atom and Ni atom is the electron acceptor from the Mulliken population analysis.
Źródło:
Acta Physica Polonica A; 2017, 131, 6; 1507-1511
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analyzing the identification mechanism of graphite and clay minerale in coal and gangue using X-rays
Autorzy:
Yin, Jianqiang
Zhu, Hongzheng
Zhu, Jinbo
Zeng, Qiuyu
Li, Liansheng
Yang, Chenguang
Powiązania:
https://bibliotekanauki.pl/articles/2146849.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
X-rays
coal gangue identification
photoelectric separation
grayscale model
pixel volume
Opis:
Three types of chelating depressants were studied for chalcopyrite/pyrite separation, including S-S, S-O, and O-O types, via density functional theory calculations and microflotation. The calculation results indicate that the depressant’s chelating atoms have large coefficient and great activity according to the molecular frontier orbital (HOMO and LUMO) and the orbital coefficients. For S-S type of depressant, S atom in both keto or enol forms won’t affect their HOMO and LUMO patterns and the orbital contributions. For S-O type, the presence of N atom in the ring structure of a molecular will increase the reactivity of O-Cu while weak S-Cu. For O-O type, the electron supply capacity of benzene ring is higher than strain chain, and atom N in strain chain increased their electron supply capacity. The microflotation results basically confirmed the prediction based on the calculation. The simulation results demonstrate that the interaction of a depressant with metals and minerals are affected obviously by the spatial structure and electronic structure of an atom in its molecular.
Źródło:
Physicochemical Problems of Mineral Processing; 2022, 58, 1; 24--36
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental study on the effects of vibrational frequency on the permeability of gas-containing coal rocks
Autorzy:
Bairu, Zhu
Yang, Song
Beining, Wu
Yongqi, Li
Powiązania:
https://bibliotekanauki.pl/articles/1853881.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wibracje
przepuszczalność
ciśnienie gazu
gas-containing coal rock
low-frequency vibration
gas pressure
permeability
sensitivity coefficient
Opis:
Low-frequency mechanical vibrations can trigger disasters such as coal-gas outbursts. An in-house “vibration-triaxial stress-seepage” experimental apparatus was used to measure the gas flow rate of rock specimens with varying vibrational frequency, gas pressure, and confining pressure. The results of these tests were then used to derive expressions that describe how the permeability of gas-containing coal rocks is related to these aforementioned factors. In addition, sensitivity coefficients were defined to characterise the magnitude of the permeability response to each permeability-affecting factor (i.e., vibrational frequency and gas pressure). The following insights were gained, regarding the effects of vibrational frequency on the permeability of gas-containing coal rocks: (1) If gas pressure and confining pressure are fixed, the permeability of gas-containing coal rocks rapidly increases, before gradually decreasing, with increasing vibrational frequency. Thus, the permeability of the gas-containing coal rock is always larger with vibrations than without. (2) If vibrational pressure and confining pressure are fixed, the relationship between the permeability of gas-containing coal rocks and gas pressure is consistent with the “Klinkenberg effect,” i.e., the permeability initially decreases, and then increases, with increasing gas pressure. (3) The change in permeability induced by each unit change in gas pressure is proportional to the gas pressure sensitivity coefficient. (4) The change in permeability induced by each unit change in vibrational frequency is proportional to the vibrational frequency sensitivity coefficient.
Źródło:
Archives of Mining Sciences; 2021, 66, 2; 265-278
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An experimental study of removing impurity from a quartz ore by microbial flotation-acid leaching
Autorzy:
Zhu, Jujian
Dai, Shujuan
Li, Pengcheng
Yang, Shuyong
Powiązania:
https://bibliotekanauki.pl/articles/1448443.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
quartz purification
flotation
acid leaching
waste bacteria
Opis:
The purity of a quartz ore is relatively low at a $SiO_2$ content of 97.18%, and the main impurity in the ore is $Fe$, $Al$, and $Ca$ bearing minerals. The main component in an industrial waste bacteria (WJ) is polysaccharides, which may be used as depressors for inhibiting iron minerals in quartz flotation. Moreover, WJ belongs to microbial inhibitors because it is mainly composed of bacteria. As a result of this study, a concentrate grade of 99.88% at recovery over 80% was obtained under the condition of 2000 g/Mg WJ dosage, a grinding fineness of 70% -0.074 mm, pH 11.7, 400 g/Mg $CaCl_2$, and 800 g/Mg $NaOL$ in the flotation experiments for the quartz ore. Moreover, a $SiO_2$ grade of 99.97% at a recovery of 68.85% was obtained at an acid dosage of 40 kg/Mg by using mixed acid of $H_2SO_4$, $HCl$, $HNO_3$, and $HF$ in mass ratios of 20%, 30%, 20%, and 30%, respectively, in subsequent acid leaching of the quartz flotation concentrate. Zeta potential analysis before and after the interaction of quartz and hematite with WJ showed that WJ increased the zeta potential of hematite significantly but had little impact on the zeta potential of quartz, indicating stronger adsorption of WJ on hematite than on quartz. FTIR analysis showed that there exist not only –$COOH$, –$CH_2$–, and –$CH_3$, which are the functional groups of starch but also $NH_2$ and –$C=O-NH$– in WJ. The $NH_2$ and –$C=O-NH$– in WJ are the important groups for adsorption, so the depressing effect on hematite was better for WJ than starch.
Źródło:
Physicochemical Problems of Mineral Processing; 2021, 57, 1; 18-28
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A nanoparticle cationic polystyrene-co-poly(n-butylacrylate) collector to eliminate the negative effect of lizardite slimes in pyrite flotation
Autorzy:
Ai, Guanghua
Liu, Cheng
Zhu, Guangli
Yang, Siyuan
Powiązania:
https://bibliotekanauki.pl/articles/24085927.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
nanoparticle collector
pyrite
lizardite slimes
flotation separation
Opis:
Lizardite slime coating is one of significant factors in the deterioration of the floatability of sulphide minerals. In this study, a nanoparticle cationic polystyrene-co-poly(n-butylacrylate)(PS-PBNH) collector was introduced to eliminate the negative impact of lizardite slimes in pyrite flotation. Microflotation results demonstrated that lizardite slims did not affect the recovery of pyrite in the presence of PS-PBNH. Good flotation separation of pyrite from lizardite was achieved when the nanoparticle PS-PBNH collector was used. The results from adsorption study indicated that PS-PBNH exhibited a significant adsorption on the pyrite surface in the presence of lizardite slimes. Sedimentation tests showed that hetero-aggregation occurred between lizardite slimes and pyrite, whereas the introduction of PS-PBNH collector resulted in a heterogeneous dispersion between them. Zeta potential measurements suggested that PS-PBNH collector interacted with pyrite surface, and the PS-PBNH adsorption changed the surface charge of pyrite from negative to be positive. As a result, the interaction of pyrite with lizardite shifted from electrostatic attraction to electrostatic repulsion, as supported by the DLVO calculations. These results indicated PS-PBNH can be used as a potential collector for pyrite flotation in pyrite/lizardite slimes system without the need for a depressant.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 3; art. no. 170899
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Near-field multiple optical trapping using high order axially symmetric polarized beams
Autorzy:
Zhou, Z
Tan, Q
Zhu, L
Yang, C
Powiązania:
https://bibliotekanauki.pl/articles/174886.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
optical trapping
surface plasmon polaritons
axially symmetric polarized beams
Opis:
The near-field multiple optical trapping using high order axially symmetric polarized beams (ASPBs) is studied for the first time. First, a near-field optical trapping scheme is proposed based on the Kretschmann–Raether configuration, and surface plasmon polaritons (SPPs) field distributions excited by incident ASPBs are calculated, which present a multi-focal-spot pattern and the size of spots is much smaller than that of the diffraction limitation. Then, the gradient forces on Rayleigh dielectric particles formed by the multi-focal-spot focused field are computed, which indicates that multiple ultra-small particles with the refractive index higher than that of the ambient medium can be trapped simultaneously on the metal surface. The number and size of trapped particles can be manipulated by flexibly modifying the polarization order of incident beams, which is expected to enhance the capability of traditional optical trapping systems and provide a solution for massively parallel optical trapping of nanometer-sized particles.
Źródło:
Optica Applicata; 2013, 43, 2; s. 287-296
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An integrated treatment technology for ground fissures of shallow coal seam mining in the mountainous area of southwestern China: a typical case study
Zintegrowana technologia zapobiegania pęknięciom gruntu w procesie wydobywania płytkich pokładów węgla w górzystym obszarze południowo-zachodnich Chin: typowe studium przypadku
Autorzy:
Zhu, H.
He, F.
Zhang, S.
Yang, Z.
Powiązania:
https://bibliotekanauki.pl/articles/215969.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
wydobywanie węgla
płytki pokład węgla
pęknięcia gruntu
zapadlisko górnicze
zintegrowana technologia zapobiegania
ochrona środowiska
shallow coal seam mining
ground fissures
surface sinkhole
integrated treatment technology
environmental protection
Opis:
This article is the result of treatments on ground fissures for environmental protection and scientific shallow coal seam mining. In the southwestern mining area of China, the traditional longwall mining method has caused a large area of surface sinkhole, ground fissures, vegetation deterioration and disorderly coal gangue. To solve these problems, an integrated treatment technology that includes ground fissure treatment technology and underground backfilled technology was proposed as a solution. The technical principle and technical process were explained in detail; the ground fissure treatment technology involves a “three-step treatment method”, and the underground backfilled technology adopted a strip mining method with backfilling technology. The compression mechanical behavior of backfilled material, including coal gangue, fly ash and ordinary Portland cement, was studied; the mixed ratio of 1:0.3:0.18 was selected. In addition, the vertical stress, vertical displacement and plastic zone of the coal pillar were determined by FLAC3D numerical simulation, and a rational mining scheme of “11 m mining width, 2 m coal pillar width” was determined to be appropriate because of the lower vertical stress, smaller vertical displacement and better supporting capacity of the coal pillar. The monitoring results of ground sinkhole indicated that the maximal ground sinkhole deformation was 17.3 cm, and the deformation showed few changes after this technology was implemented. The treatment capacity of coal gangue and fly ash reached 821.150 t per year, and the vegetation survival rate of the ground fissure treatment area reached 85%. This integrated treatment technology could effectively control ground fissures and surface sinkhole as well as protect the environment.
Artykuł jest opisem zapobiegania pęknięciom gruntu w celu ochrony środowiska, jak również naukowego podejścia do wydobywania płytko zalegających pokładów węgla. W południowo-zachodniej części górniczej Chin tradycyjna, ścianowa metoda wydobywania węgla, powodowała duży obszar powierzchniowego zapadliska, pęknięcia gruntu, pogorszenie stanu wegetacji roślin. W celu rozwiązania tych problemów zaproponowano zintegrowaną technologię zapobiegania, która obejmuje technologię zapobiegania pęknięciom gruntu i podziemną technologię podsadzki. Zasada i proces techniczny zostały szczegółowo opisane; technologia zapobiegania pęknięciom gruntu obejmuje „trójstopniową metodę zabiegu”, a technologia podsadzki zaadoptowała metodę wydobywania węgla pasami. Badano ściśliwość podsadzki, w tym odpadów węglowych, popiołu lotnego i zwykłego cementu portlandzkiego; wybrano mieszaninę o stosunku 1: 0,3: 0,18. Ponadto pionowe naprężenie, pionowe przemieszczenie i strefa plastyczności filaru węglowego zostały określone za pomocą symulacji numerycznej FLAC 3D. Racjonalny schemat wydobycia „szerokość wydobycia 11 m, szerokość filaru węglowego 2 m” był odpowiedni ze względu na niższą wartość naprężenia pionowego, mniejsze pionowe przemieszczenie i lepszą nośność filaru węglowego. Wyniki monitoringu pęknięć gruntu wskazują, że maksymalna deformacja gruntu wynosiła 17,3 cm i wykazała kilka zmian po wdrożeniu tej technologii. Ilość zagospodarowanych odpadów węglowych i popiołu lotnego wynosiła 821 150 Mg na rok, a wskaźnik przeżycia roślinności w obszarze zapobiegania pęknięciom gruntu osiągnął poziom 85%. Ta zintegrowana technologia zapobiegania może skutecznie kontrolować pęknięcia gruntu i deformację powierzchni, a także chronić środowisko.
Źródło:
Gospodarka Surowcami Mineralnymi; 2018, 34, 1; 119-138
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on the Creative Application of Origami Performance Techniques in Clothing
Autorzy:
Wang, Chenlu
Yang, Chen
Li, Junlan
Zhu, Mingxuan
Powiązania:
https://bibliotekanauki.pl/articles/2171965.pdf
Data publikacji:
2022
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
origami art
origami technique
clothing modelling
creative design
Opis:
Origami has various manifestations and rich production techniques, and it is regarded as one of the indispensable contemporary art forms. In order to enrich the creative expressions of fashion design, this paper summarises the creative application forms of origami art in fashion design from the external and moulding characteristics of origami, studies the fabric characteristics through experimental verification, and summarises the applicable techniques of expression. The results show that the folding application forms of origami art and clothing modelling can be realised by using the expression methods of ironing and crimping, stitching texture moulding and repeated combination moulding, that is, pattern deformation folding application, fabric transformation folding application and modular combination folding application. The application of the folding form in clothing three-dimensional modeling and surface texture can give full play to the unique modelling beauty and artistic style of origami art and provide a reference for creative ideas in clothing design.
Źródło:
Fibres & Textiles in Eastern Europe; 2022, 4 (151); 43--53
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Camouflage Assessments with Digital Pattern Painting Based on the Multi-Scale Pattern-in-Picture Evaluation Model
Autorzy:
Jia, Qi
Xu, Weidong
Yi, Yang
Liu, Jun
Hu, Jianghua
Zhu, Liyan
Yang, Xin
Powiązania:
https://bibliotekanauki.pl/articles/24200962.pdf
Data publikacji:
2023
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
computer-aided
camouflage assessment
pattern painting
evaluation
simulation
military camouflage
Opis:
In general, traditional evaluations of target camouflage effects are usually conducted based on observational data and general results of statistical analysis. This widely applied methodology quantifies the detection and identification probabilities of camouflage objects but has considerable shortcomings. This data evaluation process is laborious and time-consuming and very low in reproducibility, which sheds light on the necessity of developing a more efficient method in this study field. The growth of computeraided image processing technology provides technical support for camouflage effect evaluation based on digital image processing. Digital pattern painting, which has been previously applied to combat utility uniforms, is a new methodology full of potential due to its broad geographical adaptability. This study proposes a multi-scale pattern-in-picture method to evaluate camouflage effects at different distances. We also established a computer-aided background image library and camouflage assessments with digital simulation and created an evaluation system that could be effectively applied to combat utility uniforms. More than 40 testers participated in this study, who were asked to score the designed camouflage schemes using the evaluation system proposed. The data from simulation assessments and individual evaluations show that the computer-aided simulation assessments conducted as part of this research can efficiently and objectively evaluate the camouflage effect on military objects.
Źródło:
Fibres & Textiles in Eastern Europe; 2023, 31, 2; 39--50
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 37

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