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Wyświetlanie 1-10 z 28
Tytuł:
Study on the design of container highway and railway automatic transfer vehicle in ocean port
Autorzy:
Dong, L.
Liu, G.
Ye, X.
Wang, W.
Tematy:
ocean port
multimodal transport
highway and railway
unmanned automatic
seamless connection
Pokaż więcej
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:
https://bibliotekanauki.pl/articles/962741.pdf  Link otwiera się w nowym oknie
Opis:
To realize “seamless” connection of ocean port container multimodal transport, efficiently carry out “door-to-door” transport of ocean port containers and overcome the shortcomings of existing highway and railway vehicles, this study takes the standard for heavy-duty container vehicles in TB1335-1996 Railway Vehicle Strength Design and Test Identification Code as the design basis and designs a new ocean port container transport vehicle in combination with automatic guidance technology. This study innovatively designs the automatic lifting system of the bogie and the docking part of the vehicle, introduces the automatic guidance technology and the remote-control technology to optimize the car body structure, and uses the SAP software to carry out the finite element analysis of the car body load capacity and Flexsim software to carry out the simulation analysis on the operation of vehicles. The designed transfer vehicle can improve the transfer efficiency of ocean port containers, reduce the transit time of field and station equipment and container transport links, and improve the level of multimodal transport and comprehensive economic benefits.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An efficient connected dominating set algorithm in WSNs based on the induced tree of the crossed cube
Autorzy:
Zhang, J.
Xu, L.
Zhou, S. M.
Wu, W.
Ye, X.
Tematy:
wireless sensor networks
connected dominating set
induced tree
approximation algorithm
crossed cube
bezprzewodowa sieć sensorowa
podgrafy indukowane
algorytm aproksymacyjny
Pokaż więcej
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Powiązania:
https://bibliotekanauki.pl/articles/330830.pdf  Link otwiera się w nowym oknie
Opis:
The connected dominating set (CDS) has become a well-known approach for constructing a virtual backbone in wireless sensor networks. Then traffic can forwarded by the virtual backbone and other nodes turn off their radios to save energy. Furthermore, a smaller CDS incurs fewer interference problems. However, constructing a minimum CDS is an NP-hard problem, and thus most researchers concentrate on how to derive approximate algorithms. In this paper, a novel algorithm based on the induced tree of the crossed cube (ITCC) is presented. The ITCC is to find a maximal independent set (MIS), which is based on building an induced tree of the crossed cube network, and then to connect the MIS nodes to form a CDS. The priority of an induced tree is determined according to a new parameter, the degree of the node in the square of a graph. This paper presents the proof that the ITCC generates a CDS with a lower approximation ratio. Furthermore, it is proved that the cardinality of the induced trees is a Fibonacci sequence, and an upper bound to the number of the dominating set is established. The simulations show that the algorithm provides the smallest CDS size compared with some other traditional algorithms.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A hierarchical inferential method for indoor scene classification
Autorzy:
Jiang, J.
Liu, P.
Ye, Z.
Zhao, W.
Tang, X.
Tematy:
indoor scene classification
semantic hierarchical structure
rule based inference
Markov logic network
struktura hierarchiczna
regułowy system wnioskowania
sieć logiczna Markova
Pokaż więcej
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Powiązania:
https://bibliotekanauki.pl/articles/330842.pdf  Link otwiera się w nowym oknie
Opis:
Indoor scene classification forms a basis for scene interaction for service robots. The task is challenging because the layout and decoration of a scene vary considerably. Previous studies on knowledge-based methods commonly ignore the importance of visual attributes when constructing the knowledge base. These shortcomings restrict the performance of classification. The structure of a semantic hierarchy was proposed to describe similarities of different parts of scenes in a fine-grained way. Besides the commonly used semantic features, visual attributes were also introduced to construct the knowledge base. Inspired by the processes of human cognition and the characteristics of indoor scenes, we proposed an inferential framework based on the Markov logic network. The framework is evaluated on a popular indoor scene dataset, and the experimental results demonstrate its effectiveness.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication and Characterization of PMMA/HMX-based Microcapsules via in situ Polymerization
Autorzy:
Jia, X.
Hou, C.
Tan, Y.
Wang, J.
Ye, B.
Tematy:
fabrication
characterization
HMX
PMMA
microcapsules
Pokaż więcej
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Powiązania:
https://bibliotekanauki.pl/articles/358134.pdf  Link otwiera się w nowym oknie
Opis:
Microcapsule technology was applied with nitramine explosives to improve their performance. Polymethyl Methacrylate (PMMA) was selected for the fabrication of 1,3,5,7-tetranitro-1,3,5,7-tetrazocane (HMX) based microcapsules. The PMMA/HMX-based microcapsules were prepared via a facile in situ polymerization of PMMA on the surface of the HMX crystals. Structural characterization of the PMMA/HMX microcapsules was studied systematically by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy, and their thermal durability as well as their mechanical sensitivities were measured. The results indicated that spherical microcapsules were formed, with PMMA as the capsule wall and HMX as the core material. The SEM results showed that the grains of the PMMA/HMX microcapsules were spherical and that the particle distribution was homogeneous. XRD and FT-IR analyses indicated that the HMX polymorph was preserved in the optimal β-form during the whole preparative process. The DSC results showed that the PMMA/HMX microcapsules had better thermal decomposition performance, and that the apparent activation energy of the microcapsules had increased by 47.3 kJ/mol compared to the recrystallized HMX, and its thermal stability had greatly improved. In addition, the drop height (H50) had increased from 30.45 cm to 58.49 cm, an increase of 65.81%. Thus, microcapsule technology will have a very wide range of applications in reducing the sensitivity of high energy materials in the future.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Early Miocene microtoid cricetid rodent from the Junggar Basin of Xinjiang, China
Autorzy:
Maridet, O.
Wu, W.
Ye, J.
Meng, J.
Bi, S.
Ni, X.
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Powiązania:
https://bibliotekanauki.pl/articles/21577.pdf  Link otwiera się w nowym oknie
Opis:
Microtoid cricetids are widely considered to be the ancestral form of arvicoline rodents, a successful rodent group includ− ing voles, lemmings and muskrats. The oldest previously known microtoid cricetid is Microtocricetus molassicus from the Late Miocene (MN9, ca. 10–11 Ma) of Europe. Here, we report a new microtoid cricetid, Primoprismus fejfari gen. et sp. nov., from the Junggar Basin of Xinjiang, northwestern China. The rodent assemblage found in association with this specimen indicates a late Early Miocene age, roughly estimated at 18–17 Ma, and thus more than 6 million years older than M. molassicus. While morphological comparisons suggest that the new taxon is most closely related to M. molas− sicus, it differs from the latter in a striking combination of primitive characters, including a lower crown, smaller size, a differentiated posterolophid and hypolophid, a faint anterolophid, the absence of an ectolophid, and the presence of a stylid on the labial border of the tooth. Arid conditions prevailing across the mid−latitude interior of Eurasia during the Early Miocene, enhanced by the combined effects of the Tibetan uplift and the gradual retreat of the Tethys Ocean, likely played a role in the appearance of grasslands, which in turn triggered the evolution of microtoid cricetids and, ultimately, the origin of arvicoline rodents.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic diversity and relationship of Hunan province of China local tree peonies based on SSR markers
Autorzy:
Zhang, M.-H.
Jin, X.-L.
Wen, Y.-F.
Shen, S.
Wen-Xing
Wu, S.
Lu, J.-H.
Ye-Ye
Tematy:
China
Hunan Province
plant cultivation
tree peony
Paeonia suffruticosa
ornamental plant
genetic diversity
genetic relationship
SSR marker
Pokaż więcej
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Powiązania:
https://bibliotekanauki.pl/articles/12665369.pdf  Link otwiera się w nowym oknie
Opis:
Paeonia sect. Moutan is a wide known ornamental plant in the world. The objective of this study was to provide the theoretical basis for scientific preservation and utilization of tree peony resources of Hunan province of China. Simple sequence repeat (SSR) markers were applied to reveal the genetic diversity and relationship of 21 tree peony resources and 45 domestic and foreign tree peony cultivars. Clear bands, the size of which ranged from 115 bp to 379 bp, were detected with 14 primers. In total, 90 alleles were detected and the number of alleles detected with one primer varied between 5 and 13; the number of effective alleles ranged from 1.183 to 2.070; the polymorphism ratio of each locus was 100%. The observed heterozygosity, which ranged from 0.120 to 0.851 with an average of 0.532, was larger than the expected one, which ranged from 0.090 to 0.470 with an average of 0.300. Shannon index ranged from 0.137 to 0.695 and fixation index ranged from −0.332 to −0.869. The results show abundant genetic diversity in tree peony of Hunan province and SSR markers distinguishing homonymous tree peony resources successfully.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Annealing Study of Al/GaSb Contact with the Use of Doppler Broadening Technique
Autorzy:
Wang, H. Y.
Weng, H. M.
Ling, C. C.
Ye, B. J.
Zhou, X. Y.
Han, R. D.
Tematy:
78.70.Bj
68.35.Ct
73.40.Sx
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:
https://bibliotekanauki.pl/articles/2043365.pdf  Link otwiera się w nowym oknie
Opis:
Using a monoenergetic positron beam, annealing study of the Al/n-GaSb system was performed by monitoring the Doppler broadening of the annihilation radiation as a function of the positron implanting energy. The S-parameter against positron energy data was successfully fitted by a three-layer model (Al/interface/GaSb). The annealing out of the open volume defects in the polycrystalline Al layer was revealed by the decrease in the S-parameter and the increase in the effective diffusion length of the Al layer. For the as-deposited samples, a 5 nm interfacial region with S-parameter larger than those of the Al overlayer and the bulk was identified. After the 400ºC annealing, this interfacial region extends to over 40 nm and its S-parameter dramatically drops. This is possibly due to the new phase formation at the interface. Annealing behaviors of S$\text{}_{B}$ and L$\text{}_{+,B}$ of the GaSb bulk showed the annealing out of positron traps (possibly the V$\text{}_{Ga}$-related defect) at 250ºC. However, a further annealing at 400ºC induces the formation of positron traps, which are possibly of another kind of V$\text{}_{Ga}$-related defect and the positron shallow trap GaSb antisite.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spin-dependent cross sections from the three-body photodisintegration of $^{3}He$ at incident energies of 12.8 and 14.7 MeV
Autorzy:
Wu, Y. K.
Mueller, J. M.
Averett, T.
Witała, Henryk
Golak, Jacek
Perdue, B. A.
Ahmed, M. W.
Zheng, W.
Sauer, P. U.
Gao, H.
Ye, Q.
Tompkins, J. R.
Qian, X.
Huang, M.
Fonseca, A. C.
Ye, Q. J.
Dutta, D.
Stave, S.
Karwowski, H. J.
Laskaris, G.
Deltuva, A.
Weller, H. R.
Lalremruata, B.
Peng, C.
Myers, L. S.
Zhang, Y.
Skibiński, Roman
Opis:
The first measurement of the three-body photodisintegration of polarized $^{3}He$ using a circularly polarized photon beam has been performed at incident energies of 12.8 and 14.7 MeV. This measurement was carried out at the high-intensity $\gamma$-ray source located at Triangle Universities Nuclear Laboratory. A high-pressure $^{3}He$ target, polarized via spin exchange optical pumping with alkali metals, was used in the experiment. The spin-dependent double- and single-differential cross sections from $^{3}\vec{He}\left ( \vec{\gamma }, n \right )pp$ for laboratory angles varying from $30^{\circ}$ to $165^{\circ}$ are presented and compared with state-of-the-art three-body calculations. The data reveal the importance of including the Coulomb interaction between protons in the three-body calculations.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
First measurements of spin-dependent double-differential cross sections and the Gerasimov-Drell-Hearn integrand from $^{3}\vec{He}\left ( \vec{\gamma }, n \right )pp$ at incident photon energies of 12.8 and 14.7 MeV
Autorzy:
Wu, Y. K.
Mueller, J. M.
Averett, T.
Witała, Henryk
Golak, Jacek
Perdue, B. A.
Ahmed, M. W.
Zheng, W.
Sauer, P. U.
Gao, H.
Ye, Q.
Tompkins, J. R.
Qian, X.
Huang, M.
Fonseca, A. C.
Ye, Q. J.
Dutta, D.
Stave, S.
Karwowski, H. J.
Laskaris, G.
Deltuva, A.
Weller, H. R.
Lalremruata, B.
Peng, C.
Myers, L. S.
Zhang, Y.
Skibiński, Roman
Opis:
The first measurement of the three-body photodisintegration of longitudinally polarized $^{3}He$ with a circularly polarized $\gamma$-ray beam was carried out at the High Intensity $\gamma$-ray Source facility located at Triangle Universities Nuclear Laboratory. The spin-dependent double-differential cross sections and the contributions from the three-body photodisintegration to the $^{3}He$ Gerasimov-Drell-Hearn integrand are presented and compared with state-of-the-art three-body calculations at the incident photon energies of 12.8 and 14.7 MeV. The data reveal the importance of including the Coulomb interaction between protons in three-body calculations.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Wyświetlanie 1-10 z 28

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