Temat: impulse - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Forced oscillation of conformable fractional partial delay differential equations with impulses
Autorzy:: Saker, S. H.
Logaarasi, K.
Sadhasivam, V.
Tematy:: Oscillation
fractional differential equations
impulse; Pokaż więcej
Wydawca:: Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Powiązania:: https://bibliotekanauki.pl/articles/1395918.pdf Link otwiera się w nowym oknie
Opis:: In this paper, we establish some interval oscillation criteria for impulsive conformable fractional partial delay differential equations with a forced term. The main results will be obtained by employing Riccati technique. Our results extend and improve some results reported in the literature for the classical differential equations without impulses. An example is provided to illustrate the relevance of the new theorems.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Effect of Tungsten on Aluminized Melt Cast High Explosive Formulations
Autorzy:: Mishra, V. S.
Bhagat. A., L.
Vadali, S. R.
Singh, V. K.
Wasnik, R. D.
Asthana, S.
Tematy:: tungsten
MOUT
low intensity conflict
peak over pressure
impulse; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Powiązania:: https://bibliotekanauki.pl/articles/358355.pdf Link otwiera się w nowym oknie
Opis:: Aluminized 2,4,6-trinitrotoluene (TNT) based, melt-cast, high explosive compositions are widely used in warheads. These compositions offer a blast effect over a larger period due to the secondary combustion of aluminum. During recent times tungsten based explosives have been reported for lethality at close range to avoid collateral damage in low intensity conflicts (LIC) and find application in shaped charges to enhance their penetration capability. This paper reports findings on tungsten-based, melt-cast, explosive formulations. The compositions were prepared by substituting aluminum with tungsten in the reference aluminized, high explosive formulation. The compositions were characterized for their sensitivity to mechanical/shock stimuli, velocity of detonation (VOD) and blast performance. The study reveals that the impact sensitivity remains comparable on incorporating 10% tungsten at the cost of aluminum whereas an increase in tungsten content to 20% leads to an increase in impact sensitivity. However friction sensitivity and shock sensitivity remained more or less unchanged. The velocity of detonation (VOD) of tungsten-loaded, aluminized formulations is found to be comparable to the standard aluminized formulation. The peak over pressure of tungsten-based formulations is lower than the reference, aluminized composition at close range but is almost unchanged at long range. The impulse of tungsten-based formulations is also lower than the reference, aluminized composition. The reduction in impulse at close range is substantial on replacing 10% aluminum with inert tungsten.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Badanie wpływu sygnału wymuszenia energetycznego na wynik analizy częstotliwościowej w technikach termografii aktywnej
Impact of energy excitation on frequency analysis for active thermography techniques
Autorzy:: Gralewicz, G.
Więcek, B.
Tematy:: termografia
impuls
periodyczne wymuszenie
thermography
impulse
periodic energy excitation; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/157695.pdf Link otwiera się w nowym oknie
Opis:: Przedstawione w pracy wyniki dotyczą badania wpływu rodzaju sygnału wymuszenia energetycznego na wynik analizy częstotliwościowej sekwencji obrazów termograficznych oraz zestawienia wyników analiz Fouriera i falkowej dla materiałów jednorodnych termicznie. Na podstawie przeprowadzonych doświadczeń popartych modelowaniem komputerowym określono wpływ sygnału wymuszenia energetycznego periodycznego i impulsowego na wynik analizy częstotliwościowej.
Results of the excitation energy impact on frequency analysis for active thermography techniques are presented. Active thermography is a non-destructive evaluation method (NDE) in which tested items are excited with heat excitation, while infrared camera measures the changes of temperature distribution in time. Heat spreads in solid materials through diffusion which is strongly dependent on the thermal qualities of the tested material. The investigations included computer simulation and experimental tests. The analysis results of different excitation (frequency and time) for testing thermally conductive and isolative materials while using impulse and periodic energy signals are presented. The comparison between the Fourier and wavelets analysis for thermally homogeneous materials is discussed. The authors defined a parameter phase difference K? for signature defect in materials whose maximum value indicates the frequency of heat excitation. For isolative materials its value is much larger (the larger the thickness of the material, the greater the value of phase angle), while for conductive ones it is smaller, hence it is difficult to locate a defect in the material. The results of the excitation energy impact on the frequency analysis showed that periodic energy is more advantageous for isolative materials, whereas impulse energy is more useful for conductive materials.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Study on condition prediction and influencing factors of manganese carbonate recovery by high gradient pulse magnetic separation
Autorzy:: Wang, Zhenggang
Nie, Guanghua
Tang, Yun
Piao, Haishan
Chen, Jian
Tematy:: mineral particles
impulse
volume susceptibility
magnetic field strength
DLVO theory; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/24085829.pdf Link otwiera się w nowym oknie
Opis:: Manganese carbonate ore belongs to weakly magnetic minerals, and its co-associated minerals are mainly non-magnetic minerals, which can be separated from gangue minerals at high magnetic field intensity. However, manganese grade and recovery of magnetic separation concentrate of manganese carbonate ore are low in actual production. Therefore, the influences of manganese carbonate particle size, magnetic field intensity, volume susceptibility, pulse stroke, pH, and other factors were studied. The optimal test conditions for manganese carbonate ore recovery by high-gradient magnetic separation were predicted through the calculation results. The results show that the particle radius of manganese carbonate is 0.020 mm, the pulse impulse time is 200 r/min, and the magnetic field intensity is 0.9 T. The optimum condition test was carried out with Qianbei manganese carbonate ore as the material. The test results show that the optimum conditions are the particle radius of 0.074-0.019 mm, pulse impulse time of 200 r/min, and magnetic field intensity of 1.2 T. The reason for the deviation is that the actual ore has a fine distribution particle size, many associative bodies, complex composition, and serious agglomeration, resulting in variable particle volume susceptibility. The capture yield increases with the increase of magnetic field intensity and volume susceptibility but decreases with the increase of pulse. The lower the surface potential of manganese carbonate, the higher the recovery of manganese carbonate. The grade of manganese concentrate was 19.06% and the recovery was 76.85%. Mixed manganese concentrate with a grade of 18.04% and recovery of 87.14% was obtained by adding drugs and changing the grinding method.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Studies on FOX-7 Based Melt Cast High Explosive Formulations
Autorzy:: Mishra, V. S.
Vadali, S. R.
Garg, R. K.
Joshi, V. S.
Wasnik, R. D.
Asthana, S.
Tematy:: melt cast
FOX-7
LOVEX
shock sensitivity
VOD
impulse
IMs; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Powiązania:: https://bibliotekanauki.pl/articles/358915.pdf Link otwiera się w nowym oknie
Opis:: The key driving force in modern explosive research is the development of low vulnerable high explosive (LOVEX) compositions for future applications in insensitive munitions (IMs). The increasing demand for LOVEX has led to exhaustive studies on low vulnerable explosives as a replacement for conventional cyclo-1,3,5-trimethylene-2,4,6-trinitramine (RDX) in 2,4,6-trinitrotoluene (TNT) melt cast high explosive formulations. In the present study, 1,1-diamino-2,2dinitroethene (FOX-7) has been evaluated as a possible RDX replacement in TNT based, non-aluminized as well as aluminized, melt cast formulation. FOX-7 based melt cast formulations were characterized for their sensitivity to mechanical/shock stimuli, velocity of detonation (VOD), blast parameters and thermal decomposition behavior. These characteristics are compared with the corresponding RDX based compositions as reference standard. The studies show that with little sacrifice on performance parameters, FOX-7 based, non-aluminized and aluminized, melt cast formulations are found to be less vulnerable, compared with the corresponding RDX based formulations.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Kształtowanie elektrochemiczne łopatki sekwencją procesów ECM-PECM
Electrochemical shaping of airfoils with using sequences of ECM-PECM treatments
Autorzy:: Kozak, J.
Tematy:: ECM
PECM
proces ciągły
impulsy
pióro łopatki
continuous process
impulse
pen blade; Pokaż więcej
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Powiązania:: https://bibliotekanauki.pl/articles/270043.pdf Link otwiera się w nowym oknie
Opis:: W pracy przedstawiono kształtowanie elektrochemiczne pióra łopatki lotniczych silników turbinowych w dwu kolejnych zabiegach, a mianowicie obróbki prądem ciągłym ECM i prądem impulsowym PECM. Omówiono zadania cząstkowe niezbędne w projektowaniu i optymalizacji technologii elektrochemicznej Wykazano, że dokładność wymiarową ECM/PECM można poprawić utrzymując małą szczelinę pomiędzy elektrodami.
Electrochemical machining using continuous and pulse current (ECM, PECM) provides an economical and effective method for machining high strength, heat-resistant materials into complex shapes such as airfoils of titanium alloys. The dimensional accuracy of ECM/PECM can be improved if a small interelectrode gap is maintained. This paper presents the manufacturing of airfoils by sequences both treatments ECM and PECM.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Włoska eklezjologia okresu przedsoborowego
Autorzy:: Jaśkiewicz, Sylwester
Tematy:: Italian ecclesiology
Church
before the Council
impulse
growth
włoska eklezjologia
Kościół
przed Soborem
impuls
rozwój; Pokaż więcej
Wydawca:: Uniwersytet Papieski Jana Pawła II w Krakowie
Powiązania:: https://bibliotekanauki.pl/articles/669381.pdf Link otwiera się w nowym oknie
Opis:: In this article has been shown the ecclesiology of the pre-council period in Italy. The twentieth century called the century of the Church. The biggest event at the time was the Second Vatican Council. Vatican II was not a random event, but preceded by a renewal, which goes back to the early twentieth century. Also in Italy, an important role to fulfill the liturgical renewal, biblical movement, the activity of the lay faithful. In the period preceding the publication of the encyclical of Pope Pius XII on the Mystical Body of Christ, distinctive theology of the Italian representatives are: Giuseppe Siri, Francesco Chiesa, Antonio M. Vellico and Grazioso Ceriani. New impetus in the development of ecclesiology has become encyclical Mystici Corporis Christi (29.06.1943) Pope Pius XII. For example, taken by Pietro Parente (1891–1986) Mysterium Ecclesiae study with the intent to recover its original splendor to bind legal structure of the hierarchical Church, with its inner nature. Disclosure by Pope John XXIII on 25 January 1959, just three months after his election to the See of Peter, the convening of a general council, and then consult widely on the subject of proceedings has contributed significantly not only to revive interest in the Church, but also to take the very important issues related. In developing a new concept of the Church, that is more in line with the spirit of the period immediately preceding the ecclesiology of Vatican II, the priest put a significant contribution to the Diocese of Alba Natale Bussi (1907–1988), whose lectures were recorded and issued the first time already in 1961. Also noteworthy is the emphasis on the ground of Italian interest in the phenomenon of sanctity and the cult of saints. The overall look of the ecclesiology of the Italian twentieth century, which precedes the Second Vatican Council should be noted that it is not as discovery and pioneering, as ecclesiology German or French.
Dostawca treści:: Biblioteka Nauki

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