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Tytuł:
Working temperature calculation of single-core cable by nonlinear finite element method
Autorzy:
Meng, Xiaokai
Han, Peijie
Liu, Yongxin
Lu, Zhumao
Jin, Tao
Powiązania:
https://bibliotekanauki.pl/articles/141018.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cable
finite element simulation model
thermal conductivity
operating temperature
Opis:
By simulating the actual working conditions of a cable, the temperature variation rule of different measuring points under different load currents was analyzed. On this basis, a three-dimensional finite element model (FEM) was established, and the difference and influence factors between the simulation temperature and the experimental measured value were discussed, then the influence of thermal conductivity on the operating temperature of the conductor layer was studied. Finally, combined with the steady-state thermal conductivity model and the experimental measured data, the relation between thermal conductivity and load current was obtained.
Źródło:
Archives of Electrical Engineering; 2019, 68, 3; 643-656
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wizualizacja przepływu ciepła w kamiennym regeneratorze przy wykorzystaniu technologii Tao Framework
The visualization of heat flow in a rock bed by using TAO Framework technology
Autorzy:
Joachimiak, H.
Mueller, W.
Weres, J.
Nowakowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/335310.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:
wizualizacja
ogrzewanie
technologia TAO Framework
visualization
heat
technology TAO Framework
Opis:
Jednym z istotnych elementów, decydujących o właściwym zrozumieniu badanego zjawiska, którego charakter jest złożony, a zarazem przestrzenny, jest jego wizualizacja, na podstawie danych otrzymanych z doświadczenia, bądź w wyniku zrealizowania symulacji komputerowej na bazie określonego modelu systemu empirycznego. Stąd w kontekście aktualnych osiągnięć, techniki wizualizacji pełnią jedną z najskuteczniejszych metod interpretacji pokaźnej liczby danych, ponieważ przedstawiają je w formie, pozwalającej na szybkie i poprawne sformułowanie wniosków dotyczących badanego systemu. W niniejszym artykule, autorzy dokonali przeglądu jednej z najnowszych technologii informatycznych, pozwalającej między innymi na różnorodną graficzną reprezentację danych, jaką jest TAO Framework. Określili również jej przydatność z perspektywy wykorzystania tej techniki do wizualizacji przepływu ciepła, zachodzącego podczas fazy stagnacji kamiennego akumulatora.
One of many essential factors, determining right understanding of conducted experiment, that its nature is complex and spacious, it is its visualization on the basis of experimental data or as a result ofcomputer simulation implementation on the basis of an empirical system model. From this it follows, that at the present time the visualization technologies perform one of the best method of large dataset interpretation, because they show the data in this way, that they let us to form conclusions fast and correctly, concerning a studied system. In this article, the authors have checked one of the newest information technology, allowing various graphical representation of data like Tao Framework. Authors have determined also the use-fulness this technology in visualization of heat flow, occurring during hold mode of a rock bed.
Źródło:
Journal of Research and Applications in Agricultural Engineering; 2009, 54, 2; 48-50
1642-686X
2719-423X
Pojawia się w:
Journal of Research and Applications in Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using a vision cognitive algorithm to schedule virtual machines
Autorzy:
Zhao, J.
Mhedheb, Y.
Tao, J.
Jrad, F.
Liu, Q.
Streit, A.
Powiązania:
https://bibliotekanauki.pl/articles/330838.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
cloud computing
vision cognitive algorithm
VM scheduling
simulation
chmura obliczeniowa
algorytm poznawczy
szeregowanie
symulacja
Opis:
Scheduling virtual machines is a major research topic for cloud computing, because it directly influences the performance, the operation cost and the quality of services. A large cloud center is normally equipped with several hundred thousand physical machines. The mission of the scheduler is to select the best one to host a virtual machine. This is an NP-hard global optimization problem with grand challenges for researchers. This work studies the Virtual Machine (VM) scheduling problem on the cloud. Our primary concern with VM scheduling is the energy consumption, because the largest part of a cloud center operation cost goes to the kilowatts used. We designed a scheduling algorithm that allocates an incoming virtual machine instance on the host machine, which results in the lowest energy consumption of the entire system. More specifically, we developed a new algorithm, called vision cognition, to solve the global optimization problem. This algorithm is inspired by the observation of how human eyes see directly the smallest/largest item without comparing them pairwisely. We theoretically proved that the algorithm works correctly and converges fast. Practically, we validated the novel algorithm, together with the scheduling concept, using a simulation approach. The adopted cloud simulator models different cloud infrastructures with various properties and detailed runtime information that can usually not be acquired from real clouds. The experimental results demonstrate the benefit of our approach in terms of reducing the cloud center energy consumption.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2014, 24, 3; 535-550
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Upregulation of GRP78 and caspase-12 in diastolic failing heart
Autorzy:
Sun, Yingying
Liu, Guanghui
Song, Tao
Liu, Fang
Kang, Weiqiang
Zhang, Yun
Ge, Zhiming
Powiązania:
https://bibliotekanauki.pl/articles/1040708.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
caspase-12
diastolic heart failure
GRP78; hypertension
apoptosis
Opis:
Background: The endoplasmic reticulum (ER) fulfills multiple cellular functions. Various stimuli can potentially cause ER stress (ERS). ERS is one of the intrinsic apoptosis pathways and apoptosis plays a critical role in hypertension. Glucose regulated protein 78 (GRP78) has been widely used as a marker for ERS and caspase-12 mediated apoptosis was a specific apoptotic pathway of ER. The expression of GRP78 and caspase-12 remains poorly understood in the diastolic heart failure resulting from hypertension. Methods: We used spontaneously hypertensive rats (SHRs) to establish a model of diastolic heart failure, and performed immunohistochemistry, western blot, and real-time PCR to analyze GRP78 and caspase-12. Results: We found that GRP78 and caspase-12 had enhanced expression at protein and mRNA levels. Conclusions: These results suggest that GRP78 and caspase-12 were upregulated in cardiomyocytes and ERS can contribute to cardiac myocyte apoptosis in the diastolic heart failure resulting from hypertension.
Źródło:
Acta Biochimica Polonica; 2008, 55, 3; 511-516
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ultrasonic Assisted Active-Passive Filling Friction Stir Repairing to Eliminate Volume Defects
Autorzy:
Wang, Tao
Gong, Xue
Ji, Shude
Xue, Gang
Lv, Zan
Powiązania:
https://bibliotekanauki.pl/articles/2049431.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
friction stir repairing
magnesium alloys
defects
ultrasonic
mechanical properties
Opis:
Ultrasonic assisted active-passive filling friction stir repairing (A-PFFSR) was proposed to repair volume defects in the metallic parts. Sound joints without interfacial defects could be achieved. Firstly, the ultrasonic was beneficial to improving material flow and atom diffusion, and then eliminated kissing bond defects compared to conventional A-PFFSR joints. Secondly, the equiaxed grains were refined by ultrasonic vibration. Lastly, the repairing passes were reduced due to the ultrasonic, which decreased softening degree of the repaired joints. The maximum tensile strength of 150 MPa was achieved. Therefore, this strategy to repair the volume defects is feasibility and potential in the remanufacturing fields of aerospace and transportation.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 1; 217-222
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ultrafiltration treatment of wastewater contained heavy metals complexed with palygorskite
Autorzy:
Ren, Jun
Cao, Tiany
Yang, Xin
Tao, Ling
Powiązania:
https://bibliotekanauki.pl/articles/778555.pdf
Data publikacji:
2020
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
palygorskite
heavy metals
ultrafiltration
complexation
pH
ionic strength
Opis:
Palygorskite was applied in complexation-ultrafiltration treatment of heavy metals in wastewater under different pH and ionic strength. The results indicated that the rejection of heavy metals increased significantly with pH value, and decreased slightly with an increase of ionic strength of Na+ and Cl-. A certain concentration of NaCl significantly reduced the rejection rate of Cu2+. The rejection of Cu2+, Zn2+ and Cd2+ could reach over 86.8%, 93.6% and 93.7% at pH of 7 and 0.1 mol/L NaCl. The rejection of heavy metals was severely affected by low molecular weight competing complexing agents and the effect of sodium tartrate was greater than triethanolamine. In the presence of sodium tartrate, the rejection of Cu2+, Zn2+ and Cd2+ could arrive over 81.4%, 57.6% and 60.5% at pH of 7 in 20 min. Palygorskite was offered a potential complexing agent for the removal of heavy metals in wastewater at the complexation-ultrafiltration process.
Źródło:
Polish Journal of Chemical Technology; 2020, 22, 4; 1-9
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
UFA TO TAO
UFA IS TAO
Autorzy:
Weseli, Agnieszka
Ferens, Dominika
Powiązania:
https://bibliotekanauki.pl/articles/1205339.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Warszawski. Ośrodek Studiów Amerykańskich
Opis:
"What is this UFA?" The more the question comes up, the harder it is to answer. Once someone suggested that it should be answered by means of negations: "UFA is not a dog," "UFA is not cup of tea," "UFA is not a flat wrench"... Because the tao that can be defined is not the real tao.
"Co to jest ta UFA?" - im częściej pada to pytanie, tym trudniej na nie odpowiedzieć. Kiedyś pojawił się pomysł, żeby odpowiadać przeczeniami: "UFA to nie pies", "UFA to nie szklanka herbaty", "UFA to nie klucz nastawny płaski"... Ponieważ tao, które można opisać, nie jest prawdziwym tao.
Źródło:
InterAlia: Pismo poświęcone studiom queer; 2010, 5
1689-6637
Pojawia się w:
InterAlia: Pismo poświęcone studiom queer
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tocharian A ārkiśoṣi ‘world with radiance’ and Chinese suo po shi jie ‘world of sabhā’
Autorzy:
Pan, Tao
Powiązania:
https://bibliotekanauki.pl/articles/2035886.pdf
Data publikacji:
2022-01-14
Wydawca:
Polska Akademia Nauk. Instytut Kultur Śródziemnomorskich i Orientalnych PAN
Tematy:
Tocharian
Sanskrit
Chinese
world
ārkiśoṣi
Opis:
This article provides an explanation for the single and puzzling Tocharian B gloss śaiṣṣe ‘world’ (instead of Tocharian A ārkiśoṣi) for Sanskrit jagat- ‘world’ on a Sanskrit fragment SHT 4438 with all the other glosses in Tocharian A. Based on a detailed study of the Sanskrit and Chinese texts, Tocharian A ārkiśoṣi is very likely the loan translation of Sanskrit sā̆bhāloka(dhātu)- ‘a world with radiance’, which is preserved in the Chinese translations by Kumārajīva and other translators connected with Kucha. In the Kucha area, the first part sā̆bhā- was understood as containing -(ā)bhā- ‘radiance’. Buddhist Sanskrit sa(b)hāloka(dhātu)- is built from sa(b)hāpati- ‘master of sa(b)hā world’, epithet of the highest divinity Brahmā in the sahāloka-, which derives via Middle Indic from the older epithet sabhāpati- ‘owner of the assembly hall’ in Atharvaveda. The excursus at the end offers a glimpse into the complicated transmission process of Chinese Buddhist terminology based on the analysis of Chinese sha men ‘monk’ and he shang ‘teacher, monk’.
Źródło:
Acta Asiatica Varsoviensia; 2021, 34; 263-294
0860-6102
Pojawia się w:
Acta Asiatica Varsoviensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermodynamics and Kinetics Analysis on Carbothermic Reduction of Calcined Magnesite in Vacuum
Autorzy:
Tang, Qifeng
Ao, Jinqing
Peng, Biyou
Guo, Biao
Yang, Tao
Powiązania:
https://bibliotekanauki.pl/articles/2125546.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
calcined magnesite
carbothermic reduction
vacuum
thermodynamics
kinetics
Opis:
The carbothermic reduction of calcined magnesite in vacuum was studied. By thermodynamic analysis, the starting temperature of reduction reaction dropped from 2173K to 1523K when system pressure dropped from 1 atmosphere to 100 Pa. The experiments were carried out at different conditions under 10~100 Pa and the experimental results shown that the reduction extent of MgO improved by increasing the reaction temperature and time, the pellet forming pressure as well as adding fluoride as catalyst. The rate-determining step of carbothermic reduction process was gas diffusion with the apparent activation energy of 241.19~278.56 kJ/mol.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 3; 1021--1026
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal error modeling of spindle and dynamic machining accuracy reliability analysis of CNC machine tools based on IA and LHSMC
Autorzy:
Zhang, Ziling
Feng, Shuo
Ding, Yan
Mei, Xiao
Tao, Zhiqiang
Powiązania:
https://bibliotekanauki.pl/articles/2057984.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
electric spindle unit
thermal error
latin hypercube sampling monte carlo method
finite element simulation
machining accuracy reliability
Opis:
Machining accuracy reliability as a key index of CNC machine tools is seriously influenced by the geometric and thermal errors. In the paper, a spindle unit thermal error modeling and machining accuracy reliability analysis method is proposed. By analyzing the heat generation mechanism, a thermal error model was developed to describe the thermal deformation of the electric spindle. Based on the immune algorithm (IA), the heat generation power and the heat transfer coefficient were optimized, and the thermal error was obtained by finite element thermal-mechanical coupling. By adopting the multi-body system theory (MBS), a dynamic machining accuracy model was put forward including the geometric and thermal errors. Based on the Latin hypercube sampling Monte Carlo method (LHSMC), a machining accuracy reliability analysis method was proposed to characterize the machining accuracy reliability considering the geometric and thermal errors. The method was employed to a machine tool, and the experimental results indicate the verification and superiority of the method.
Źródło:
Eksploatacja i Niezawodność; 2022, 24, 1; 100--113
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical Simulations on Physicochemical Performance of Novel High-energy BHDBT-based Propellants
Autorzy:
Wang, Ke
Huang, Hai-tao
Xu, Hui-xiang
Li, Huan
Li, Jun-qiang
Fan, Xue-zhong
Pang, Wei-qiang
Powiązania:
https://bibliotekanauki.pl/articles/27787879.pdf
Data publikacji:
2021
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
molecular dynamic
BHDBT
migration
mechanical properties
safety
Opis:
Based on Energy Calculation Star program and molecular dynamic method, three designed 2,3-bis(hydroxymethyl)-2,3-dinitro-1,4-butanediol tetranitrate-based (BHDBT) propellants are firstly reported and their physicochemical performance are investigated. Results suggest that compared with HMX-based and CL-20-based propellants, the specific impulses of all BHDBT-based propellants surpass or approximate 280 s, which indicates the latter have the potential to be high-energy propellants. The diffusion coefficient of plasticizers in BHDBT-based propellant decrease as the temperature reduces, and reduce in the order: Bu-NENA > TMETN > BTTN. The densities of all BHDBT-based propellants surpass or approximate 1.7 g/cm3. The comparison of elastic constants, Poisson’s ratios and K/G values indicates that the mechanical properties of three BHDBT-based propellants increase in the order (by plasticizer): Bu-NENA < TMETN < BTTN. The bond length analysis of C–NO2 and O–NO2 bond in BHDBT suggests that the former is the trigger bond in the BHDBT-based propellants, and the safety of BHDBT-based propellants and BHDBT crystal decreases in the order: GAP/BTTN/Al/BHDBT > GAP/Bu-NENA/Al/BHDBT ≈ GAP/TMETN/Al/BHDBT > BHDBT. In conclusion, GAP/BTTN/Al/BHDBT propellant has the potential to be a novel high-energy propellant.
Źródło:
Central European Journal of Energetic Materials; 2021, 18, 1; 5--24
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The ternary Goldbach problem in arithmetic progressions
Autorzy:
Liu, Jianya
Zhan, Tao
Powiązania:
https://bibliotekanauki.pl/articles/1390842.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
ternary Goldbach problem
exponential sum over primes in arithmetic progressions
mean-value theorem
Opis:
For a large odd integer N and a positive integer r, define b = (b₁,b₂,b₃) and $(N,r) = {b∈ ℕ³ : 1 ≤ b_j ≤ r, (b_j, r) = 1$ and b₁+b₂+b₃ ≡ N (mod r)}. It is known that $#(N,r) = r² ∏_{p|r}_{p|N} ((p-1)(p-2)/p²) ∏_{p|r}_{p∤N} ((p²-3p+3)/p²)$. Let ε > 0 be arbitrary and $R = N^{1/8-ε}$. We prove that for all positive integers r ≤ R, with at most $O(Rlog^{-A}N)$ exceptions, the Diophantine equation N = p₁+p₂+p₃, ⎨ $p_j ≡ b_j (mod r),$ j = 1,2,3,$ ⎩ with prime variables is solvable whenever b ∈ (N,r), where A > 0 is arbitrary.
Źródło:
Acta Arithmetica; 1997, 82, 3; 197-227
0065-1036
Pojawia się w:
Acta Arithmetica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Preparation and Properties of Low-Nitrogen Nitrocellulose by Alkaline Denitration
Autorzy:
Tao, Zhongan
Li, Shiying
Ding, Yajun
Xiao, Zhongliang
Powiązania:
https://bibliotekanauki.pl/articles/1062782.pdf
Data publikacji:
2020
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
waste
high-nitrogen nitrocellulose
denitration
nitrogen content
explosion heat
recycling
Opis:
Waste high-nitrogen nitrocellulose (NC) has always been disposed of as hazardous material for destruction, and has not been recycled as a resource. The present work describes how waste high-nitrogen NC may be converted to low-nitrogen NC via an alkaline denitration reaction between sodium hydrosulfide and the nitrate ester groups, in order to control and reduce the nitrogen content for industrial products. Scanning electron microscopy (SEM), infrared spectroscopy (FT-IR), 1H nuclear magnetic resonance spectroscopy (1H NMR) and X-ray diffraction (XRD) were used to detected the changes in the surface morphology and chemical structure of the NC samples. TG-DSC tests analyzed the decomposition temperature and the heat released on thermal decomposition, and the explosion heat was obtained by calorimetry. The results demonstrated that the denitration reaction does not destroy the skeletal structure of NC. Notably, the nitrogen content of NC may be reduced from 12.92 to 10.74%, generating the level for industrial products (N <12%). Moreover, NC samples with different nitrogen contents have similar decomposition trends and decomposition temperatures, but the heat released is gradually decreased and the explosion heat is significantly reduced, and confirms the successful partial removal of nitrate ester groups from NC. Therefore, the alkaline denitration affords a potential method for recycling waste high-nitrogen NC.
Źródło:
Central European Journal of Energetic Materials; 2020, 17, 4; 535-551
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The far-zone behaviors of light waves on scattering from particulate medium with various distribution
Autorzy:
Dai, Qihang
Xie, Zhongyuan
Pan, Xiaoning
Ji, Xiaoling
Wang, Tao
Powiązania:
https://bibliotekanauki.pl/articles/2086763.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
weak scattering
particulate collection
spectral density
Opis:
The far-zone spectral density of light waves scattered on a particulate medium was discussed, and the influence of characteristics of the medium on the far-zone scattered spectral density was investigated. It is shown that the normalized spectral density of the scattered field is closely related with the structural characteristics of the particles collection, including the relative size of particles and the distribution information of particles in the collection. These results may provide potential application in the reconstruction of the structure information of particulate medium.
Źródło:
Optica Applicata; 2022, 52, 2; 273--282
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Existence Of P≥3-Factor Covered Graphs
Autorzy:
Zhou, Sizhong
Wu, Jiancheng
Zhang, Tao
Powiązania:
https://bibliotekanauki.pl/articles/31341575.pdf
Data publikacji:
2017-11-27
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
P≥3-factor
P≥3-factor covered graph
toughness
isolated toughness
regular graph
Opis:
A spanning subgraph F of a graph G is called a P≥3-factor of G if every component of F is a path of order at least 3. A graph G is called a P≥3-factor covered graph if G has a P≥3-factor including e for any e ∈ E(G). In this paper, we obtain three sufficient conditions for graphs to be P≥3-factor covered graphs. Furthermore, it is shown that the results are sharp.
Źródło:
Discussiones Mathematicae Graph Theory; 2017, 37, 4; 1055-1065
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł

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