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Tytuł:
Local Characterisation and Detection of Woven Fabric Texture Based on a Sparse Dictionary
Autorzy:
Wu, Ying
Wang, Ren
Lou, Lin
Wang, Lali
Wang, Jun
Powiązania:
https://bibliotekanauki.pl/articles/2172000.pdf
Data publikacji:
2022
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
fabric texture representation
sparse representation
weave repeat
defect detection
dictionary learning
Opis:
To achieve enhanced accuracy of fabric representation and defect detection, an innovative approach using a sparse dictionary with small patches was used for fabric texture characterisation. The effectiveness of the algorithm proposed was tested through comprehensive characterisation by studying eight weave patterns: plain, twill, weft satin, warp satin, basket, honeycomb, compound twill, and diamond twill and detecting fabric defects. Firstly, the main parameters such as dictionary size, patch size, and cardinality T were optimised, and then 40 defect-free fabric samples were characterised by the algorithm proposed. Subsequently, the Impact of the weave pattern was investigated based on the representation result and texture structure. Finally, defective fabrics were detected. The algorithm proposed is an alternative simple and scalable method to characterise fabric texture and detect textile defects in a single step without extracting features or prior information.
Źródło:
Fibres & Textiles in Eastern Europe; 2022, 3 (151); 33--40
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New Middle Jurassic kempynin osmylid lacewings from China
Autorzy:
WANG, YONGJIE
LIU, ZHIQI
REN, DONG
SHIH, CHUNGKUN
Powiązania:
https://bibliotekanauki.pl/articles/945768.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
Kempyninae are a subfamily of osmylid lacewings whose extant representatives are restricted to the austral continents. Three new osmylids, Jurakempynus sinensis gen. et sp. nov., J. bellatulus gen. et sp. nov., and J. epunctatus gen. et sp. nov. are described from the Middle Jurassic Jiulongshan Formation of Daohugou Village, Inner Mongolia, China. The new genus Jurakempynus is assigned to the subfamily Kempyninae constituting its oldest known occurrence. It is allied to the Australian genus Kempynus, sharing two synapomorphies: extremely expanded MP space and distally forked MP2 in the hindwing. The occurrence of Jurakempynus gen. nov. in China (Northern Hemisphere) implies a much wider geographic range of the Mesozoic osmylid lacewings in comparison to their modern counterparts.
Źródło:
Acta Palaeontologica Polonica; 2011, 56, 4; 865-869
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Earliest true moth lacewing from the Middle Jurassic of Inner Mongolia, China
Autorzy:
ZHENG, BINGYU
REN, DONG
WANG, YONGJIE
Powiązania:
https://bibliotekanauki.pl/articles/945472.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
A new moth lacewing Guithone bethouxi gen. et sp. nov., is described from the Middle Jurassic Jiulongshan Formation (Inner Mongolia, China). This taxon is characterized by robust body, head retracted under pronotum, and remarkable costal space (expanded basad, narrowed distad). Herein, we propose a detailed definition of the lineages of Ithonidae sensu lato (moth lacewings, giant lacewings, and montane lacewings) based on extant groups in order to clarify the systematics of fossil species within the taxon. The comparison shows that Guithone bethouxi gen. et sp. nov. unquestionably represents the earliest true moth lacewing, implying that lineage differentiations within Ithonidae sensu lato must have taken place before the Middle Jurassic. Furthermore the new genus possessing some particular venation characters, such as irrecurrent humeral veinlet and simplified crossveination in radial sector, represents an important intermediate group in the evolution of Ithonidae sensu lato.
Źródło:
Acta Palaeontologica Polonica; 2016, 61, 4; 847-851
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorption of quaternary ammonium salt hydrophobic modifiers on the α-quartz (001) surface: a density functional theory study
Autorzy:
Liu, Chunfu
Wang, Weitao
Wang, Han
Zhu, Chenyu
Ren, Bao
Powiązania:
https://bibliotekanauki.pl/articles/24085768.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
α-quartz (001) surface
quaternary ammonium salt
density functional theory
adsorption mechanism
Opis:
To investigate the adsorption mechanism of quaternary ammonium salt on the α-quartz (001) surface, the adsorption models of hydrophobic modifiers 1231, 1431, 1631 and 1831 were constructed and simulated using the density functional theory (DFT). Results indicate that the adsorption energy of quaternary ammonium salt increases with the increase of carbon chain length, and the adsorption en-ergy reaches the maximum at 18 carbon atoms; however, the adsorption capacity of 1631 is weak owing to the carbon chain deflection. Based on the Mulliken bond population analysis, reagent 1831 has the strongest interaction with α-quartz (001) surface compared with 1231, 1431 and 1631; and during the adsorption process, charge transfer and electrostatic attraction occur between the reagent and α-quartz (001) surface with similar degrees of charge transfer observed. This study emphasizes that electrostatic attraction plays a key role in the adsorption process, while the week hydrogen bonding plays a second-ary role.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 3; art. no. 170260
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new genus of lance lacewings from the Middle Jurassic of Inner Mongolia, China
Autorzy:
Ma, Y.
Shih, C.
Ren, D.
Wang, Y.
Powiązania:
https://bibliotekanauki.pl/articles/2082186.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Insecta
Neuroptera
Osmylidae
Osmylinae
Mesozoic
Asia
China
Opis:
Fossils of Osmylinae are rare, currently only one fossil genus of this subfamily is known, Lithosmylus which is recorded from the late Eocene Florissant Formation of USA. Herein, we report a new Osmylinae genus with two new species, Vetosmylus tentus gen. et sp. nov. and Vetosmylus maculosus gen. et sp. nov. from the Middle Jurassic Jiulongshan Formation of Daohugou Village, Inner Mongolia, China, The new genus shares many apomorphic characters with extant osmyline relatives, e.g., forked subcostal veinlets in forewing; dense cross-veins present in radial sector, usually forming one complete outer gradate series in forewing; the region between MA and MP significantly broadened in hind wing, but with only one row of cells, implying a likely morphological stasis during the evolution of Osmylinae. The new genus Vetosmylus, the first and earliest record hitherto of Osmylinae from the Mesozoic, enhances our understanding of the early stages of their evolution.
Źródło:
Acta Palaeontologica Polonica; 2020, 65, 2; 363-369
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Controllable propagation of Pearcey–Gaussian beams in photorefractive media with fractional Schrödinger equation
Autorzy:
Guo, Teng
Gao, Ru
Ren, Shumin
Wang, Pengxiang
Xiao, Yan
Powiązania:
https://bibliotekanauki.pl/articles/2172852.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
Pearcey-Gaussian beam
fractional Schrödinger equation
photorefractive medium
breathing soliton
Opis:
Taking the fractional Schrödinger equation as the theoretical model, the evolution behavior of the Pearcey–Gaussian beam in the photorefractive medium is studied. The results show that breathing solitons are generated when the nonlinear effect and the diffraction effect are balanced with each other. Nonlinear coefficients, Lévy index and beams amplitude affect breathing period of the soliton and maximum peak intensity. Within a certain range, the breathing period of the soliton decreases with the increase of the nonlinear coefficient and the Lévy index. However when the beams amplitude increases, the breathing period and the maximum peak intensity of the soliton increase. Under the photorefractive effect, due to the bidirectional self-acceleration property of the Pearcey beam, the solitons formed will propagate vertically. These properties can be used to manipulate the beam and have potential applications in optical switching, plasma channeling, particle manipulation, etc.
Źródło:
Optica Applicata; 2022, 52, 4; 627--638
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gender difference in corporate social responsibility implementation in Lithuanian SMEs
Autorzy:
Lu, Jintao
Ren, Licheng
Zhang, Chong
Wang, Chunyan
Petkeviciute, Nijole
Streimikis, Justas
Powiązania:
https://bibliotekanauki.pl/articles/19233546.pdf
Data publikacji:
2020
Wydawca:
Instytut Badań Gospodarczych
Tematy:
Corporate Social Responsibility
perceptions of CSR
gender diversity
senior managers
SMEs
Opis:
Research background: There are many scientific papers dealing with the challenges of Corporate Social Responsibility (CSR) implementation at the company level. However, there are few studies dealing with gender difference between female and male managers in the perception towards CSR initiative. Purpose of the article: To understand the differences between male and female managers' behaviour in the process of CSR implementation in companies. Methods: A survey of managers at different levels in Lithuanian Small and Medium Enterprises (SMEs) was performed in 2019. The study focused on the female and male respondents' answers to the participation in CSR implementation, their perception about CSR implementation and the most important issues for them in that process. Findings & Value added: The results of the study indicated that, compared to their male counterparts, female respondents highlighted different factors having impact on successful implementation of CSR initiatives. Female managers were more convinced to the benefits of CSR practices than their male counter-parts. The "Communication skills" were defined as the most important for implementing CSR strategy for the females and "Understanding of CSR strategy" for males. For most of the female managers, "Sociality" was the most important competence necessary for a leader, followed by "Global and holistic thinking", however, the male respondents were more doubtful about all the necessary competencies for a sustainability leader. The main theoretical value added of the paper is elicitation of the differences between male and female managers in the perception of CSR initiatives and necessary skills of a leader for implementing these initiatives in SMEs. The practical and managerial im-plications  were also provided for the strengthening of the CSR activities in SMEs.
Źródło:
Oeconomia Copernicana; 2020, 11, 3; 549-569
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Enhanced Run-Length Encoding Compression Method for Telemetry Data
Autorzy:
Shan, Y.
Ren, Y.
Zhen, G.
Wang, K.
Powiązania:
https://bibliotekanauki.pl/articles/221755.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
multichannel acquisition system
high compression performance
run-length encoding with error parameter
oversampling
hardware implementation
Opis:
The telemetry data are essential in evaluating the performance of aircraft and diagnosing its failures. This work combines the oversampling technology with the run-length encoding compression algorithm with an error factor to further enhance the compression performance of telemetry data in a multichannel acquisition system. Compression of telemetry data is carried out with the use of FPGAs. In the experiments there are used pulse signals and vibration signals. The proposed method is compared with two existing methods. The experimental results indicate that the compression ratio, precision, and distortion degree of the telemetry data are improved significantly compared with those obtained by the existing methods. The implementation and measurement of the proposed telemetry data compression method show its effectiveness when used in a high-precision high-capacity multichannel acquisition system.
Źródło:
Metrology and Measurement Systems; 2017, 24, 3; 551-562
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of sodium petroleum sulfonates with different molecular weights for flotation of kyanite ore
Autorzy:
Chen, B. Z.
Gao, H.
Li, Y.
Jin, J.
Ren, Z.
Wang, W.
Powiązania:
https://bibliotekanauki.pl/articles/109492.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
evaluation
sodium petroleum sulfonate
kyanite
flotation kinetics
entrainment
Opis:
The flotation performance of sodium petroleum sulfonates with different molecular weights was evaluated for flotation of a kyanite ore, by investigating valuable mineral recovery-grade, flotation kinetics and gangue entrainment. The results indicated that the higher molecular weight of agent, the higher final cumulative kyanite recovery was, with the maximum value of 72% being obtained with KY-3 with the molecular weight of 438. The final cumulative kyanite grade initially increased, and then decreased with the molecular weight increasing. In other words, the maximum final cumulative kyanite grade (i.e. 89.05%) was obtained with KY-2 with the molecular weight of 392. The kyanite flotation kinetics followed the first order kinetics well, while the modified flotation rate constant showed a decreasing trend after the initial increase as the molecular weight increased. In addition, the overall entrainment degree decreased with decreasing molecular weight of sodium petroleum sulfonates. The use of KY-2 in kyanite flotation was an attractive option in comparison with KY-1 and KY-3.
Źródło:
Physicochemical Problems of Mineral Processing; 2017, 53, 2; 956-968
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Failure-based sealing reliability analysis considering dynamic interval and hybrid uncertainties
Autorzy:
Sun, Bo
Yang, Xi
Ren, Yi
Wang, Zili
Antosz, Katarzyna
Loska, Andrzej
Jasiulewicz-Kaczmarek, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/1841699.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
reliability analysis
dynamic interval
hybrid uncertainty
physics of failure
sealing
Opis:
In the reliability analysis of a sealing structure, radial clearance of the contact surface is usually regarded as a failure criterion, and the sample size is usually quite small, which brings great challenges to uncertainty quantification. Therefore, this paper proposes a reliability analysis method based on the leakage mechanism of the sealing. With the application of dynamic interval, the proposed method can be used to deal with problem of degradation in small sample to evaluate reliability. Moreover, the dynamic reliability with the mixture of the probabilistic and non-probabilistic variables can be obtained using the proposed method. An illustrative numerical case study of a spool valve is conducted in order to validate the proposed method and the implemented reliability sensitivity analysis. The proposed method is of great help in evaluating and predicting reliability with small degradation sample and hybrid uncertainties.
Źródło:
Eksploatacja i Niezawodność; 2021, 23, 2; 278-284
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Separation and physicochemical properties of residual carbon in gasification slag
Autorzy:
Fan, Xiaoting
Fan, Panpan
Liu, Xiaodong
Ren, Zhenyang
Bao, Weiren
Wang, Jiancheng
Dong, Lianping
Fan, Minqiang
Powiązania:
https://bibliotekanauki.pl/articles/2175447.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
waste treatment
gasification slag
physical properties
chemical properties
structural features
reaction kinetics
Opis:
Gasification slag is the solid waste produced in the coal gasification process, and its treatment and disposal problems are becoming more and more serious. In this study, the gasification slag produced in a chemical base in northern China and its residual carbon obtained by gravity separation of water medium were taken as the research objects, and their physicochemical properties were analyzed comprehensively. The residual carbon products, ash-rich products and high-ash products were obtained from the gasification slag after gravity separation. Under the optimal structure, the ignition loss of residual carbon products was reduced from 79.80% to 16.84%, and the yield was 11.64%. The high content of amorphous carbon and developed pores in the residual carbon provide the possibility of manufacturing high value-added materials. Raman spectrum showed that the residual carbon had lower aromaticity, higher content of small and medium aromatic ring structures, lower structural stability and easier combustion. Thermogravimetric combustion kinetics showed that the average combustion rate of residual carbon was 0.325(dm/dt)mean/%•min−1, the comprehensive combustion characteristic index was 1.41•10−9%2•min−2•°C−3. It has excellent performance and can be used as a raw material for mixed combustion in a circulating fluidized bed. The analysis of physical and chemical properties of residual carbon is of great significance for follow-up exploration of the resource utilization and high-value utilization of the residual carbon.
Źródło:
Physicochemical Problems of Mineral Processing; 2022, 58, 6; art. no. 154928
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comprehensive surveillance of the antibody response to Borrelia burgdorferi s.l. in small ruminants in China
Autorzy:
Yang, J.
Liu, Z.
Guan, G.
Li, Y.
Chen, Z.
Ma, M.
Liu, A.
Ren, Q.
Wang, J.
Luo, J.
Yin, H.
Powiązania:
https://bibliotekanauki.pl/articles/49708.pdf
Data publikacji:
2015
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2015, 22, 2
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new fossil lacewing genus and species from the Middle Jurassic of Inner Mongolia, China
Autorzy:
Wang, Y
Liu, Z.
Ren, D.
Powiązania:
https://bibliotekanauki.pl/articles/22432.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
new fossil
fossil
paleontology
systematics
lacewing genus
lacewing species
Middle Jurassic
Jurassic
Inner Mongolia
China
Tenuosmylus brevineurus
Poriminae
Eidoporisminae
Stenosmylinae
Opis:
A new fossil lacewing, Tenuosmylus brevineurus gen. et sp. nov., was collected from an outcrop of Middle Jurassic strata in the village of Daohugou, Inner Mongolia, China. The new genus is assigned to Gumillinae based on eleven defining characteristics of the subfamily. The affiliation of Tenuosmylus including other five genera of the subfamily is discussed. Our result supports the opinion that Epiosmylinae was a junior synonym of Gumillinae, which is likely a relic of ancient osmylids based on similarity of forewing venation. Veins Mp₂ and Cu₂ have complicated branches that are generally present in extinct as well as some extant subfamilies (Poriminae, Eidoporisminae, Stenosmylinae). A key is given to differentiate six known genera within Gumillinae.
Źródło:
Acta Palaeontologica Polonica; 2009, 54, 3; 557-560
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The feasibility of using high-resolution ultrasonography to assess ulnar nerve in patients with diabetes mellitus
Przydatność ultrasonografii wysokiej rozdzielczości w badaniu nerwu łokciowego u pacjentów chorujących na cukrzycę
Autorzy:
Chen, Jun
Wang, Chun-Lei
Wu, Shan
He, Shan
Ren, Jun
Powiązania:
https://bibliotekanauki.pl/articles/1033382.pdf
Data publikacji:
2017
Wydawca:
Medical Communications
Tematy:
high-resolution ultrasonography
Opis:
Objective: The aim of this study was to investigate the usefulness of high-resolution ultrasonography for the diagnosis of polyneuropathy in diabetes mellitus patients by the examination of the ulnar nerves. Method: We recruited 100 healthy age-matched volunteers (50 women and 50 men) with 200 arms without diabetes or cubital tunnel syndrome as the control group. We assessed the upper limbs of 100 diabetes mellitus patients (45 women and 55 men), 40 of whom had electrophysiologically confirmed diabetic peripheral neuropathy and 60 had no diabetic peripheral neuropathy in the upper limbs. Age, sex, height and weight were recorded and the cross-sectional area of the ulnar nerve was measured at every predetermined site. Results: The cross-sectional area of the ulnar nerve was measured at six sites (mid-humerus, inlet of the cubital tunnel, outlet of the cubital tunnel, upon the medial epicondyle, 6 cm upon the wrist crease and Guyon tunnel). The ulnar nerve in two measuring sites (mid-humerus, upon the medial epicondyle) in the control group showed a statistical difference between men and women (p < 0.05). There was no statistical difference in the cross-sectional area in the control group when dominant and non-dominant arms were compared. The cross-sectional area was larger in the diabetic peripheral neuropathy group in three sites (inlet of the cubital tunnel, outlet of the cubital tunnel, Guyon tunnel) compared with those in the control group. Conclusion: High-resolution ultrasonography may be helpful in the early diagnosis of peripheral neuropathy in diabetic patients.
Cel: Celem badania było określenie przydatności ultrasonografii wysokiej rozdzielczości w diagnostyce polineuropatii u pacjentów z cukrzycą poprzez badanie nerwu łokciowego. Metoda: Przebadano kończyny górne 100 pacjentów z cukrzycą (45 kobiet i 55 mężczyzn), z których 40 cierpiało na elektrofizjologicznie potwierdzoną obwodową neuropatię cukrzycową, a u 60 nie rozpoznano obwodowej neuropatii cukrzycowej w kończynach górnych. Jako grupa kontrolna w badaniu udział wzięło 100 zdrowych wolontariuszy w podobnym wieku (50 kobiet i 50 mężczyzn), niecierpiących na cukrzycę ani zespół kanału łokciowego (łącznie 200 rąk). Określono wiek, płeć, wzrost i wagę oraz zmierzono pole przekroju poprzecznego nerwu łokciowego w każdym ustalonym miejscu. Wyniki: Pole przekroju poprzecznego nerwu łokciowego zmierzono w sześciu miejscach (środek kości ramiennej, wejście do kanału łokciowego, wyjście z kanału łokciowego, nad nadkłykciem przyśrodkowym, 6 cm ponad nadgarstkiem i kanał Guyona). W grupie kontrolnej wykazano statystycznie istotną różnicę w nerwie łokciowym w dwóch miejscach pomiaru (środek kości ramiennej, nad nadkłykciem przyśrodkowym) pomiędzy mężczyznami a kobietami (p < 0,05). Nie wykazano różnicy statystycznej w polu przekroju poprzecznego w grupie kontrolnej podczas porównywania ręki dominującej i niedominującej. Pole przekroju poprzecznego było większe w grupie z obwodową neuropatią cukrzycową w trzech miejscach (wejście do kanału łokciowego, wyjście z kanału łokciowego, kanał Guyona) w porównaniu z grupą kontrolną. Wniosek: Ultrasonografia wysokiej rozdzielczości może okazać się pomocna we wczesnej diagnostyce neuropatii obwodowej u pacjentów z cukrzycą. Artykuł w wersji polskojęzycznej jest dostępny na stronie http://jultrason.pl/index.php/wydawnictwa/volume-17-no-70
Źródło:
Journal of Ultrasonography; 2017, 17, 70; 160-166
2451-070X
Pojawia się w:
Journal of Ultrasonography
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 25

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