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    Tytuł:
    Dynamic load analysis of the connecting bolts in a universal joint
    Autorzy:
    An, Yuchen
    Liu, Jing
    Li, Zengguang
    Powiązania:
    https://bibliotekanauki.pl/articles/2087028.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    dynamic loads
    connecting bolts
    universal joint
    dynamic model
    Opis:
    Dynamic loads of the connecting bolts in a universal joint can greatly affect the bolt fatigue and fracture, as well as the machinery safety and stability. But few researches focused on those. To obtain the dynamic load characteristics of the connecting bolts in a universal joint, this paper established a flexible dynamic model for the connecting bolts. A multibody dynamic model of a universal joint is developed. The dynamic loads on the connecting bolts of the universal joint are analyzed. The influences of the preloads, speeds and loads are studied. The amplitude and frequency properities are obtained. The effect of the preload is small when the preload is in the range of 80%~120% of the standard value. The load and speed have great influence on the time- and frequency-domain dynamic loads of the bolts. The flexible dynamic model of the connecting bolt is closer to the actual situation than the rigid model since it can consider the preload and deformation of the bolts. This study can provide guidance for the fatigue life prediction of the universal shaft and its bolts.
    Źródło:
    Eksploatacja i Niezawodność; 2022, 24, 2; 211--225
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the local defect distribution on vibration characteristics of ball bearings
    Wpływ rozkładu wad lokalnych na charakterystykę drgań łożysk kulkowych
    Autorzy:
    Liu, Jing
    Xu, Yajun
    Wang, Linfeng
    Xu, Zidan
    Tang, Changke
    Powiązania:
    https://bibliotekanauki.pl/articles/302142.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    ball bearing
    local defect
    multi-body dynamics
    vibrations
    distribution
    łożysko kulkowe
    wada lokalna
    dynamika układów wieloczłonowych
    drgania
    rozkład
    Opis:
    Local defects in ball bearings may occur at the center line of raceway and its surrounding areas. However, most current studies were concentrated in studying the influence of the local defect located at the centerline of raceway on the bearing vibrations, where the effects of local defects surround the centerline were ignored. To overcome this problem, based on Hertzian point contact theory and multi-body dynamic algorithm, a multi-body dynamic model considering the offset and angular distributions for a ball bearing with a local defect on its outer raceway is established. The influences of offset distance and skew angle between the geometric center of local defect and the centerline of outer raceway on the bearing vibrations are investigated. The relationship between the offset distance and the impulse waveform characteristics is obtained, as well as that between the skew angle and the impulse waveform characteristics. The results show that the offset distance and skew angle of the local defect have a great influence on the time-domain impulse waveform characteristics of the bearing accelerations. This paper can provide a useful guidance for the accurate diagnosis of early local fault in the ball bearings.
    Wady lokalne łożysk kulkowych mogą występować na linii środkowej bieżni oraz w otaczających ją obszarach. Jednak większość dotychczasowych badań nad wpływem wad lokalnych na drgania łożyska koncentruje się na wadach linii środkowej bieżni ignorując oddziaływanie wad zlokalizowanych w obszarach otaczających tę linię. Aby rozwiązać ten problem, w przedstawionej pracy wykorzystano teorię kontaktu Hertza oraz algorytm do analizy dynamiki układów wieloczłonowych, co pozwoliło na utworzenie modelu dynamiki układu wieloczłonowego uwzględniającego przesunięcie i rozkłady kątowe łożyska kulkowego z lokalną wadą na bieżni zewnętrznej. Badano wpływ wartości przesunięcia i kąta nachylenia między geometrycznym środkiem wady lokalnej a linią środkową bieżni zewnętrznej na drgania łożyska. Otrzymano zależności pomiędzy wartością przesunięcia a charakterystyką przebiegu impulsu, a także między kątem nachylenia a charakterystyką przebiegu impulsu. Wyniki pokazują, że wartość przesunięcia i kąt nachylenia wady lokalnej mają duży wpływ na przebieg przyspieszeń łożyska w dziedzinie czasu. Praca dostarcza pożytecznych wskazówek na temat trafnego diagnozowania lokalnych uszkodzeń łożysk kulkowych w ich wczesnych stadiach.
    Źródło:
    Eksploatacja i Niezawodność; 2019, 21, 3; 485-492
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation of Dendrite Morphology and Micro-Segregation in U-Nb Alloy During Solidification
    Autorzy:
    Su, Bin
    Liu, Jing-Yuan
    Zhang, Xiao-Peng
    Yan, Xue-Wei
    Powiązania:
    https://bibliotekanauki.pl/articles/2174585.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    U-Nb alloys
    solidification process
    dendrite growth
    cellular automaton
    numerical simulation
    Opis:
    Due to the importance of uranium and uranium alloys to national defence and nuclear industrial applications, it is necessary to understand dendrite formation in their solidification structures and to control their microstructures. In this study, a modified cellular automaton model was developed to predict 2-D and 3-D equiaxed dendrite growth in U-Nb alloys. The model takes into account solute diffusion, preferential growth orientation, interface curvature, etc., and the solid fraction increment is calculated using the local level rule method. Using this model, 2-D large-scale and 3-D equiaxed dendrite growth with various crystallographic orientations in the U-5.5Nb alloy were simulated, and the Nb micro-segregation behaviour during solidification was analysed. The simulated results showed reasonable agreement with the as-cast microstructure observed experimentally.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 4; 1333--1339
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Correlation of chromosome damage and promoter methylation status of the DNA repair genes MGMT and hMLH1 in Chinese vinyl chloride monomer (VCM)-exposed workers
    Autorzy:
    Wu, Fen
    Liu, Jing
    Qiu, Yu-Lan
    Wang, Wei
    Zhu, Shou-Min
    Sun, Pin
    Miao, Wen-Bin
    Li, Yong-Liang
    Brandt-Rauf, Paul W.
    Xia, Zhao-Lin
    Powiązania:
    https://bibliotekanauki.pl/articles/2179802.pdf
    Data publikacji:
    2013-03-01
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    vinyl chloride monomer
    chromosome damage
    MGMT
    hMLH1
    DNA methylation
    Opis:
    Objective: To explore the association of the methylation status of MGMT and hMLH1 with chromosome damage induced by vinyl chloride monomer (VCM). Materials and Methods: Methylation of MGMT and hMLH1 was measured in 101 VCM-exposed workers by methylation-specifi c PCR. Chromosome damage in peripheral blood lymphocytes was measured by the cytokinesis-block micronucleus assay. The subjects were divided into chromosome damaged and non-damaged groups based on the normal reference value of micronuclei frequencies determined for two control groups. Results: MGMT promoter methylation was detectable in 5 out of 49 chromosome damaged subjects, but not in the chromosome non-damaged subjects; there was a signifi cant difference in MGMT methylation between the two groups (p < 0.05). Conclusions: We detected aberrant promoter methylation of MGMT in a small number of chromosome damaged VCM-exposed workers, but not in the chromosome non-damaged subjects. This preliminary observation warrants further investigation in a larger study.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2013, 26, 1; 173-182
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on a New Synthesis of LLM-105 Using N-Nitroso-bis(cyanomethyl)amine
    Autorzy:
    Jing, S.
    Liu, Y.
    Liu, D.
    Guo, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/358371.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    LLM-105
    energetic materials
    synthesis
    characterization
    properties
    Opis:
    A new three-step synthetic method was designed to prepare 2,6-diamino- 3,5-dinitropyrazine 1-oxide (LLM-105) with an overall yield of 43.5%, using iminodiacetonitrile, triethylamine and hydroxylamine hydrochloride as the starting materials, and involved nitrosylation, cyclization and nitration. The structure of LLM-105 was characterized by FTIR, 1H NMR spectroscopy and elemental analysis. The crucial factors and mechanism of the cyclization were explored. Thermal decomposition, mechanical sensitivity and the purity of the LLM-105 were determined by TG-DTA, an impact sensitivity instrument and high performance liquid chromatography (HPLC) respectively. The results showed that LLM-105 synthesised via 2,6-diamino-3,5-dinitropyrazine (ANPZ) was less sensitive to impact, but the LLM-105 synthesized by the new method had some obvious advantages in terms of purity, security and production costs. Moreover, the LLM-105 synthesized by this new method can be initiated reliably without recrystallization.
    Źródło:
    Central European Journal of Energetic Materials; 2016, 13, 1; 21-32
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fast edge detection approach based on global optimization convex model and Split Bregman algorithm
    Autorzy:
    Jing, Y.
    Liu, J.
    Liu, Z.
    Cao, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/329158.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    edge detection
    active contour
    global optimization
    numerical minimization
    split Bregman algorithm
    detekcja krawędzi
    kontur aktywny
    optymalizacja globalna
    algorytm Bregmana
    Opis:
    Active contour model is a typical and effective closed edge detection algorithm, which has been widely applied in remote sensing image processing. Since the variety of the image data source, the complexity of the application background and the limitations of edge detection, the robustness and universality of active contour model are greatly reduced in the practical application of edge extraction. This study presented a fast edge detection approach based on global optimization convex model and Split Bregman algorithm. Firstly, the proposed approach defined a generalized convex function variational model which incorporated the RSF model’s principle and Chan’s global optimization idea and could get the global optimal solution. Secondly, a fast numerical minimization scheme based on split Bregman iterative algorithm is employed for overcoming drawbacks of noise and others. Finally, the curve evolves to the target boundaries quickly and accurately. The approach was applied in real special sea ice SAR images and synthetic images with noise, fuzzy boundaries and intensity inhomogeneity, and the experiment results showed that the proposed approach had a better performance than the edge detection methods based on the GMAC model and RSF model. The validity and robustness of the proposed approach were also verified.
    Źródło:
    Diagnostyka; 2018, 19, 2; 23-29
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and Theoretical Studies of a New High Explosive, N,N,-Bis(3-aminofurazan-4-yl)-4,4´-diamino- 2,2´,3,3´,5,5´,6,6´-octanitroazobenzene
    Autorzy:
    Jing, S.
    Liu, Y.
    Liu, D.
    Guo, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/358642.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    BAFDAONAB
    density functional theory
    detonation properties
    Opis:
    A new high energy, low sensitivity material N,N,-bis(3-aminofurazan- 4-yl)-4,4´-diamino-2,2´,3,3´,5,5´,6,6´-octanitroazobenzene (BAFDAONAB) was synthesized from 4-chlorobenzoic acid and diaminofurazan. The structure of BAFDAONAB was characterized by FT-IR, NMR and Elemental Analyses and its purity was determined by HPLC. The optimized structure and thermodynamic parameters were obtained at the DFT- B3LYP/6-31+G** theoretical level. Its detonation properties were also predicted by the formulae of Kamlet-Jacobs and the Monte-Carlo method. The results show that the density, heat of formation, detonation velocity, detonation pressure, impact sensitivity and purity were 1.93 g/cm3, 4487.44 kJ/mol, 9.01 km/s, 35.03 GPa, 63 cm and 99.3%, respectively. In addition, the compound was an insensitive high explosive which could meet the requirements of high energetic materials.
    Źródło:
    Central European Journal of Energetic Materials; 2015, 12, 4; 745-755
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative Studies on a Chamfer Technology and a Convex Roll Technology During the Soft Reduction Process
    Autorzy:
    Zong, Nanfu
    Jing, Tao
    Liu, Yang
    Powiązania:
    https://bibliotekanauki.pl/articles/2049345.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    convex roll technology
    chamfer technology
    deformation behavior
    cracking risk
    Opis:
    To comprehensively investigate the diversity of a chamfer technology and a convex roll technology under the same soft reduction process (i.e., section size, reduction amount, casting speed and solid fraction), a three-dimensional mechanical model was developed to investigate the effect of the chamfer profile and roll surface profile on the deformation behavior, cracking risk, stress concentration and reduction force of as-cast bloom during the soft reduction process. It was found that a chamfer bloom and a convex roll can both avoid the thicker corner of the as-cast bloom solidified shell, and significantly reduce reduction force of the withdrawal and straightening units. The convex profile of roll limits lateral spread along bloom width direction, therefore it forms a greater deformation to the mushy zone of as-cast bloom along the casting direction, the tensile strain in the brittleness temperature range (BTR) can obviously increase to form internal cracks. The chamfer bloom is much more effective in compensating the solidification shrinkage of mushy zone. In addition, chamfer bloom has a significant decrease of tensile strain in the brittleness temperature range (BTR) areas, which is expected to greatly reduce the risk of internal cracks.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 3; 819-829
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Internal Cracking on Carbide Precipitation in Continuous Casting Bloom Induced by Soft Reduction Technology and the Resulting Segregated Band in Hot-Rolled Wire Rods
    Autorzy:
    Zong, Nanfu
    Jing, Tao
    Liu, Yang
    Powiązania:
    https://bibliotekanauki.pl/articles/2048876.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    internal cracking
    carbide precipitation
    segregated band
    soft reduction technology
    Opis:
    Internal cracking surrounding primary carbides in high carbon steel as-cast blooms induced by soft reduction is investigated to elucidate their influence of internal cracking on carbide precipitation and the resulting segregated band in hot-rolled wire rods. The primary carbides precipitation in high carbon steel has been investigated using both experimental observations and finite element simulations for as-cast blooms induced by soft reduction. It is found that the carbides precipitation in the vicinity of existing internal cracks is often located midway between the surface and centreline of the bloom, further increases the occurrence of the segregated bands in the hot-rolled wire rods. In addition, the growth of primary carbides surrounding the internal cracking are based on the chemical driving force and high density precipitate zones have been clarified in continuous casting bloom induced by soft reduction. It clearly shows that the spatial distribution of internal cracking surrounding primary carbides that play a key role in the formation of the segregated bands in the final steel products.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 1; 73-82
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Conformational Ensemble of B Chain in $T_{6}$ Human Insulin Based on the Landau Free Energy
    Autorzy:
    Lei, Yanlin
    He, Jianfeng
    Liu, Jiaojiao
    Li, Jing
    Powiązania:
    https://bibliotekanauki.pl/articles/1398189.pdf
    Data publikacji:
    2018-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    insulin
    structural flexibility
    free energy
    conformational ensemble
    Opis:
    Insulin is an important peptide hormone for the glucose metabolism. The structural flexibility of insulin B chain attracts a lot of our attention for understanding the biological activity. Our work carried out the extensive sampling to statistically clarify the structural changes of isolated $T_{6}$ human insulin B chain. We introduced the Landau free energy to describe the isolated insulin B chain whose experimental structure locates a local energy minimum. Its trained model was subjected to thousands of heating and cooling circles between the high and low temperatures. Six typical structure clusters were found by classifying the final generated structures with RMSD and radius of gyration. The structures in clusters indicate the potential deformations of insulin B chain at residues 5-8 of N-terminus, residues 9-12 of central helix and residues 24-29 of C-terminus, which agrees with the experimental results.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 5; 1261-1265
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Image compression and encryption algorithm with wavelet-transform-based 2D compressive sensing
    Autorzy:
    Fan, Jing-Hui
    Liu, Xian-Bao
    Chen, Yan-Bin
    Powiązania:
    https://bibliotekanauki.pl/articles/175122.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    wavelet transform
    compressive sensing
    chaos scrambling
    image encryption
    image compression
    Opis:
    By combining a wavelet transform with chaos scrambling, an image compression and encryption algorithm based on 2D compressive sensing is designed. The wavelet transform is employed to obtain the sparse representation of a plaintext image. The sparse image is measured in two orthogonal directions by compressive sensing. Then, the result of 2D compressive sensing is confused by the Arnold transform and the random pixel scrambling. The combination of four-dimensional chaos and logistic map is exploited to generate the first row of the key-controlled circulant matrix. The proposed algorithm not only carries out image compression and encryption simultaneously, but also reduces the consumption of the key by controlling the generation of measurement matrix. Experimental results reveal that the proposed image compression and encryption algorithm is resistant to noise attacks with good compression performance and high key sensitivity.
    Źródło:
    Optica Applicata; 2019, 49, 3; 461-472
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Graphs Whose Aα-Spectral Radius Does Not Exceed 2
    Autorzy:
    Wang, Jian Feng
    Wang, Jing
    Liu, Xiaogang
    Belardo, Francesco
    Powiązania:
    https://bibliotekanauki.pl/articles/31566069.pdf
    Data publikacji:
    2020-05-01
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    Aα -matrix
    Smith graphs
    limit point
    spectral radius
    index
    Opis:
    Let A(G) and D(G) be the adjacency matrix and the degree matrix of a graph G, respectively. For any real α ∈ [0, 1], we consider Aα(G) = αD(G) + (1 − α)A(G) as a graph matrix, whose largest eigenvalue is called the Aα-spectral radius of G. We first show that the smallest limit point for the Aα-spectral radius of graphs is 2, and then we characterize the connected graphs whose Aα-spectral radius is at most 2. Finally, we show that all such graphs, with four exceptions, are determined by their Aα-spectra.
    Źródło:
    Discussiones Mathematicae Graph Theory; 2020, 40, 2; 677-690
    2083-5892
    Pojawia się w:
    Discussiones Mathematicae Graph Theory
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sustainable Apparel Product Design Methods: a Fashion Brand Company Case Study
    Metody zrównoważonego projektowania produktu w zakresie odzieży: studium przypadku firmy marki modowej
    Autorzy:
    Zheng, Jing
    Li, Li
    Gu, Wen
    Liu, Gang Xiao
    Powiązania:
    https://bibliotekanauki.pl/articles/234207.pdf
    Data publikacji:
    2020
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    sustainability
    sustainable apparel
    product design
    clothing series design
    fashion brand company
    zrównoważony rozwój
    zrównoważone projektowanie
    produkty odzieżowe
    projektowanie serii odzieży
    marka modowa
    Opis:
    Fashion brand companies must fully consider all the three following aspects in apparel product design: perspectives, method and model (the key research questions proposed by this study), and practise in a sustainable way, with a focus on the combination of enterprise practices and sustainable development. In this paper, we make full use of the key elements of clothing design to establish a user-friendly theoretical model based on the concept of “clothing series design” and conducted the first trial at an appropriate company (Burberry). Then we applied this method derived from our model to the new products released as part of the 2019 Spring and Summer collection at a Chinese apparel company to test the stability of the method. The study proposed a new sustainable design method and received positive application results through the tests at Burberry and at a Chinese apparel company, which can be considered as one of the major contributions of this study.
    Firmy modowe muszą w pełni uwzględnić wszystkie trzy aspekty projektowania produktów odzieżowych: perspektywy, metody i modele (kluczowe pytania badawcze zaproponowane w badaniu) i praktykować w sposób zrównoważony, koncentrując się na połączeniu praktyk przedsiębiorstw i zrównoważonego rozwoju. W artykule w pełni wykorzystano kluczowe elementy projektowania odzieży, tak aby stworzyć przyjazny dla użytkownika model teoretyczny oparty na koncepcji „projektowania serii odzieży” i przeprowadzono pierwszą próbę w firmie odzieżowej „Burberry”. Następnie zastosowano metodę pochodzącą z opracowanego modelu w nowych produktach wydanych w ramach kolekcji wiosenno-letniej 2019 w chińskiej firmie odzieżowej, w celu przetestowania stabilności tej metody. Badanie zasugerowało nową metodę zrównoważonego projektowania i uzyskało pozytywne wyniki zastosowania w testach w Burberry i chińskiej firmie odzieżowej, które można uznać za jeden z głównych wkładów tego badania.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2020, 4 (142); 23-33
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laser Power Transmission and Its Application in Laser-Powered Electrical Motor Drive: A Review
    Autorzy:
    Liu, Hongzuo
    Zhang, Yixuan
    Hu, Yihua
    Tse, Zion
    Wu, Jing
    Powiązania:
    https://bibliotekanauki.pl/articles/1955981.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    laser power transmission
    photovoltaic material
    laser diode
    optical fibre power transmission
    atmosphere transmission
    Opis:
    Laser power transmission (LPT) is considered a potentially efficient way for power delivery, especially in long-distance wireless applications and harsh hazardous environmental conditions. In contrast to other wireless power transmission (WPT) methods, LPT has many advantages such as lower device size, focused transmitting direction and high power density. With the development of technology, LPT has been widely adopted in several fields. In conservative industries, the utilisation of LPT can resolve the limitation problem in a wired connection. The adverse influence of electromagnetic interference (EMI) concerning application and high-temperature fields can be reduced. This paper will give a simple review of LPT and demonstrate the basic concept of a photoelectric emitter, transmission channel and receiver material. Based on the recent research about diode laser beam combining technology and high-efficiency multi-junction photovoltaics (PV) materials, the advised LPT devices for simple application as laser power motor will be simply discussed.
    Źródło:
    Power Electronics and Drives; 2021, 6, 41; 167-184
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Columnar Dendrite Morphology and Solute Concentration of GH3039 Nickel-Based Superalloys during Wire and Laser Additive Manufacturing: Insights from Phase Field Simulations
    Autorzy:
    Zong, Nanfu
    Wang, Zheng
    Liu, Yang
    Liang, Xinghong
    Jing, Tao
    Powiązania:
    https://bibliotekanauki.pl/articles/2203717.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wire and laser additive manufacturing
    phase field simulation
    solute concentration
    interface crystallographic deflection
    columnar dendrite
    Opis:
    Wire and laser additive manufacturing (WLAM) can produce outstanding mechanical properties of GH3039 nickel-based superalloys. A quantitative rapid phase field model with solute trapping kinetics has been developed during the rapid solidification process, where a range of process conditions are considered in terms of thermal gradients and pulling speeds. Intergranular hot cracking is found to occur at boundaries of tilted columnar dendrite in the GH3039 nickel-based superalloys. The simulations demonstrate that the phase field model considering the interface deflection can represent the dendrite growth during additive manufacturing more realistically. With the aid of numerical simulations, it is determined that dendrite growth morphologies transform from symmetrical columnar dendrite to tilted columnar dendrite as the interface crystallographic deflection is increased, while increasing the deflection angle can lead to uneven composition of material matrix, especially at the columnar dendrite interface. Solute concentrations at the columnar dendrite interface tend to promote hot cracking in additively manufactured Ni-based superalloy.
    Źródło:
    Archives of Metallurgy and Materials; 2023, 68, 1; 387--393
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dioscin improves survival in murine endotoxemia induced by Lipopolysaccharide
    Autorzy:
    Bing, Han
    Jing, Lu
    Meitong, Liu
    Zhe, Feng
    shuang, Guan
    Powiązania:
    https://bibliotekanauki.pl/articles/895519.pdf
    Data publikacji:
    2018-12-31
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    cytokines
    survival
    Endotoxemia
    Dioscin
    NF- қB
    Opis:
    Dioscin is a natural steroidal saponin mainly exacted from Dioscoreae Rhizoma, which usually used as traditional medicine in east asia area. Dioscin has various pharmacological actions. However, little is known concerning the role on Lipopolysaccharide (LPS)-induced endotoxemia. The aim of the present study was to investigate the effects and possible mechanisms of dioscin against LPS-induced endotoxemia in mice. The data showed dioscin significantly increased mouse survival when mice were treated with dioscin prior to or after LPS challenge and significantly attenuated TNF-α, IL-1β and IL-6 production in serum. Further studies revealed that dioscin could downregulate LPS-induced nuclear transcription factor - қB (NF-қB) signal transduction pathways. These observations indicated that dioscin modulated early cytokine responses by blocking NF-қB activation, and thus, increased mouse survival in murine endotoxemia induced by LPS.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2018, 75, 6; 1347-1352
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical Modelling of Chamfer Billet of High Carbon Steel During Continuous Casting
    Autorzy:
    Zong, Nanfu
    Ma, Sida
    Sun, Weizhao
    Liu, Yang
    Jing, Tao
    Powiązania:
    https://bibliotekanauki.pl/articles/2125549.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chamfer billet
    internal cracks
    GCr15 steel
    soft reduction
    Opis:
    The formation of internal cracks in as-cast billet is mainly attributed to the stress and strain states near the solidifying front. This study investigates the effect of chamfer configuration of as-cast billet on the maximal principal stress and the tensile stress during soft reduction process. The LIT and ZDT of GCr15 bearing steel are calculated by the solidification phase transformation model. What’s more, the 3D finite element models is established to investigate stress and strain states in the brittle temperature range. The relationships between chamfer angle and maximal principal stress, internal crack, as well as equivalent plastic strain are analyzed. Numerical results reveal that a chamfer configuration of as-cast billet is much more effective than a rectangular one on decreasing the risk of internal cracks.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 3; 967--974
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of water intake layout along the wharf shoreline on ships
    Autorzy:
    Kong, Xian-wei
    Ding, Lei
    Liu, Hai-cheng
    Qu, Jing
    Li, Xiao-song
    Powiązania:
    https://bibliotekanauki.pl/articles/258971.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    water intake
    physical model
    numerical model
    lateral flow
    hydrodynamic force
    Opis:
    The construction of a water intake along the wharf shoreline can realise the intensive and comprehensive utilisation of the shoreline. However, since the water intake will increase the lateral flow at the wharf and also the hydrodynamic forces on ships, it will bring risks to ships mooring and leaving. The effects of the water intake on ships are studied using a physical model, numerical model and standard formulas. The results show that it leads to an increase of the hydrodynamic forces acting on the ship when the standard formulas are used to calculate the forces without considering the water level difference between the two sides of the ship. The results of the physical model are closer to the real situation. Measures that can effectively reduce the influence of the water intake on ships are proposed by increasing the distance between the wharf front and the front of the water intake as well as the depth of the water inlet windows.
    Źródło:
    Polish Maritime Research; 2019, 4; 165-171
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fatigue life prediction of wire rope based on grey particle filter method under small sample condition
    Autorzy:
    Zhao, Dan
    Liu, Yu-Xin
    Ren, Xun-Tao
    Gao, Jing-Zi
    Liu, Shao-Gang
    Dong, Li-Qiang
    Cheng, Ming-Shen
    Powiązania:
    https://bibliotekanauki.pl/articles/2038206.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    wire rope
    fatigue life prediction
    small sample size
    grey theory
    particle filter method
    Opis:
    The fatigue life prediction of wire ropes has two main characteristics: a large test sample size and uncertain factors. In this paper, based on the small number of wire rope fatigue life data, the grey particle filter method has been used to realize the fatigue life prediction of wire rope under different load conditions. First, the GOM(1,1) model is constructed and the reliability life data of wire rope is predicted under small sample size. Then, P-S-N curve of the dangerous part is determined by combining the equivalent alternating stress of the dangerous part of the wire rope during the fatigue test. Subsequently, the particle filter method is used to modify P-S-N curve. Finally, the fatigue life prediction model of wire rope is obtained based on fatigue damage accumulation, which realized the fatigue life prediction under different load conditions, and the results were compared with that from the test. The results show that the proposed method is effective and has high accuracy in wire rope fatigue life prediction under single, combined loading conditions and small sample size.
    Źródło:
    Eksploatacja i Niezawodność; 2021, 23, 3; 454-467
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    ANTI-INFLAMMATORY ACTIVITY AND CYTOTOXICITY OF DIOSGENIN ON LIPOPOLYSACCHARIDES INDUCED RAW 264.7 CELLS
    Autorzy:
    ning, jing
    chang, yu
    wang, ruxia
    lan, zhiwei
    ru, qing
    liu, mingchun
    tian, chunlian
    Powiązania:
    https://bibliotekanauki.pl/articles/895615.pdf
    Data publikacji:
    2020-04-29
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    Diosgenin
    Anti-inflammatory
    lipopolysaccharides
    cytotoxicity
    phagocytosis ability  
    Opis:
    Diosgenin is a steroidal sapogenin compound, and possesses multiple biological activities including anti-inflammatory, anticancer, immunological regulation, and anti-aging. The current study focused on its anti-inflammatory activities and cytotoxicity by analysis of NO production, phagocytosis activity, secretion of TNF-α and IL-6 and cell viability in LPS-induced RAW 264.7 cells. An IC50 value of diosgenin of 2.8 μM was calculated for diosgenin by regression of cell viability from concentrations ranging from 0.01 to 25 μM; this indicated that 0.01, 0.02, 0.04 μM diosgenin could reduce phagocytic activity very significantly (p<0.01) in a dose-dependent manner with no cytotoxic effect on the LPS-induced RAW 264.7 cells. However, there was no significant effect on NO content and secretion of TNF-α and IL-6 after diosgenin treatment. The research revealed that low concentrations diosgenin can directly inhibit cells phagocytosis, with no effect on the release of inflammatory mediators and cytokines. This lays a foundation for screening for a safe dose in research and developent of derivatives and new formulation of diosgenin for its anti-inflammatory effect.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2020, 77, 2; 313-317
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recovery of Proteins from Sweet Potato Cell Liquid by Acidification via Inoculation-Enhanced Fermentation and Determination of Functional Properties of Protein Products
    Autorzy:
    Li, Qingshuai
    Liu, Liping
    Han, Yanlei
    Zhao, Xiangying
    Yao, Mingjing
    Ma, Jing
    Han, Mo
    Zhang, Jiaxiang
    Powiązania:
    https://bibliotekanauki.pl/articles/28408449.pdf
    Data publikacji:
    2024-02-09
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Tematy:
    sweet potato proteins
    Leuconostoc citreum
    protein precipitation
    digestibility
    emulsification
    foaming
    Opis:
    Starch production from fresh sweet potatoes generates process wastewater called sweet potato cell liquid (SPCL), which is rich in sweet potato protein (SPP). Currently, the commonly used protein recovery methods, such as isoelectric point precipitation and ultrafiltration, were not suitable for SPP recovery due to the low protein content of SPCL and the high cost of recovery. The feasibility of recovering SPP by SPCL acidification via inoculation-assisted fermentation was investigated in this study. The results indicated that the pH of SPCL could be reduced to approximately 4.0 within 6 h of fermentation with inoculation, resulting in an SPP extraction yield of 55.45% and purity of 66.23 g protein/100 g. With the addition of heating treatment, the extraction yield of SPP increased to 76.97–95.34%, while it maintained the purity of 66.36–70.12 g protein/100 g. The composition analysis revealed that SPP products contained sugars (below 11.5 g/100 g) in addition to protein and trace amounts of lignin and phenolics. Functional properties analysis showed that the SPP recovered by inoculation-enhanced fermentation exhibited better emulsifying and foaming properties, and higher digestibility compared to the SPP precipitated using hydrochloric acid. The method of extracting SPP from SPCL by inoculation-enhanced fermentation, as developed in this study, was a straightforward and cost-effective process that fosters significant potential for industrial applications.
    Źródło:
    Polish Journal of Food and Nutrition Sciences; 2024, 74, 1; 49-58
    1230-0322
    2083-6007
    Pojawia się w:
    Polish Journal of Food and Nutrition Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and Theoretical Studies of a New Insensitive Explosive, 2’-Methyl-3-nitro-2’H-[1,3’-bi(1,2,4-triazole)]-5,5’-diamine
    Autorzy:
    Luo, J.
    Liu, Y.
    Wang, J.
    Chai, T.
    Yuan, J.
    Chang, S.
    Yu, Y.
    Jing, S.
    Ma, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/358633.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    insensitive explosive
    synthesis
    theoretical studies
    density functional theory
    new 1,2,4-triazole derivative
    Opis:
    A new insensitive energetic material 2’-methyl-3-nitro-2’H-[1,3’-bi(1,2,4-triazole)]-5,5’-diamine (1) was prepared by a three-step synthesis from commercially available chemicals. The energetic title compound was comprehensively characterized by various means, including FT-IR, multinuclear (1H, 13C, 14N) NMR spectroscopy, elemental analysis, HPLC and thermal analysis. The sensitivities of the synthesized material towards various external stimuli (impact, friction) were determined according to the BAM method. The optimized structure and related thermodynamic parameters were obtained at the DFT-B3LYP/6-31+G** theoretical level. The detonation properties of the material were also predicted according to the Kamlet-Jacobs formulae and the Monte-Carlo method. The results show that the density, heat of formation, detonation velocity, detonation pressure, impact sensitivity and purity were 1.83 g/cm3, 369 kJ/mol, 7.52 km/s, 25.4 GPa, 82.3 J and 97.7%, respectively. In addition, the compound was an insensitive high explosive which could meet the requirements of high energetic materials.
    Źródło:
    Central European Journal of Energetic Materials; 2017, 14, 2; 269-280
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterized Microstructure and Electrical Properties of Hydrogenated Nanocrystalline Silicon Films by Raman and Electrical Conductivity Spectra
    Autorzy:
    Xiao-Yong, Gao
    Jian-Tao, Zhao
    Yu-Fen, Liu
    Qing-Geng, Lin
    Yong-Sheng, Chen
    Jin-Hua, Gu
    Shi-E, Yang
    Jing-Xiao, Lu
    Powiązania:
    https://bibliotekanauki.pl/articles/1808127.pdf
    Data publikacji:
    2009-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.23.Cq
    73.61.-r
    Opis:
    Microstructure and electrical properties of hydrogenated nanocrystalline silicon (nc-Si:H) film deposited on glass substrate at low temperature were characterized by average grain size, crystallinity, and dark electrical conductivity data obtained from the Raman and electrical conductivity spectroscopy, respectively. The average grain size, crystallinity and electrical conductivity have a similar change with substrate temperature. A threshold substrate temperature determined by silane concentration appears in their corresponding spectroscopy vs. substrate temperature. The dependence of crystallinity, average grain size and electrical conductivity on substrate temperature were accounted for by surface diffusion model and heterojunction quantum dot model, respectively.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 3; 738-741
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of differential serum expression of three factors and pulmonary function in patients with silicosis
    Autorzy:
    Zhu, Ying
    Duan, Xia Yu
    Cheng, Yun Qi
    Yao, Xin Jing
    Xu, Hong
    Zhang, Kui Sheng
    Li, Feng Shi
    Yang, Fang
    Liu, Liang He
    Yuan, Xiang Ju
    Powiązania:
    https://bibliotekanauki.pl/articles/2086531.pdf
    Data publikacji:
    2021-08-05
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    silicosis
    pulmonary function
    early diagnosis
    ROC
    PTPN2
    factor B
    Opis:
    ObjectivesSilicosis is a chronic occupational lung disease. As was previously found by the authors, some proteins increased in the lung tissue of activated rats, and protein tyrosine phosphatase non-receptor type 2 (PTPN2), factor B, and vaccinia-related kinase 1 (VRK1) showed highly differential expressions.Material and MethodsIn this study, serum and bronchoalveolar lavage fluid samples were collected from patients with silicosis and healthy people to verify the expression of PTPN2, factor B, and VRK1. The diagnostic value of differentially expressed proteins for silicosis was judged.ResultsThe expression levels of serum PTPN2, VRK1, and factor B in patients with silicosis were significantly higher than those in the control group (p < 0.01). Higher serum PTPN2 and factor B concentrations significantly and negatively correlated with the ratio of forced expiratory volume in 1 s to forced vital capacity (FEV1/FVC), maximum vital capacity (VCmax), FEV1, and FVC, suggesting that the high expression of PTPN2 and factor B is associated with decreased pulmonary ventilation function and restrictive ventilatory impairment in patients with silicosis. All area under curve (AUC) measurements generated from single detection events were >0.744, with PTPN2 reaching the highest value (0.858). The AUC, sensitivity, and specificity for the combined diagnosis using factor B and PTPN2 were 0.907, 86.91% and 85.07%, respectively, for factor B and PTPN2. The 3 differentially expressed proteins are potential classes of predictive biomarkers for silicosis.ConclusionsRegarding the economy and test practicality, the best diagnostic combination is factor B and PTPN2 for the analysis of AUC, sensitivity and specificity.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2021, 34, 4; 527-540
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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