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1

Applying the Tilt depth and Tilt Euler techniques of gravity data to decipher the basement depth in Sichuan Basin, China

Chen Qing, Dong Yunpeng, Tan Xianfeng, Wang Jiabei, Huang Xiaoyu, Chen Hao

Acta Geophysica

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2021

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Vol. 69, no. 6

2173--2186

EN

The tilt angle (i.e., TDR) provides an efficient way to recognize the horizontal locations of multi-source geological bodies at different depths and inclination angles. The tilt-depth method was initially derived by applying magnetic formulas and used to calculate the depth of magnetic sources. Recently researchers have attempted to extend this method to interpret depths in gravity field data. The tilt-depth method of gravity anomalies (i.e., GTilt-depth) could capture the depth of a buried source effectively, which makes it superior at deciphering the basement relief. Meanwhile, Tilt-Euler deconvolution (i.e., Euler deconvolution of TDR) has been utilized for estimating a source’s position from gridded data automatically, which requires no structural index. However, analytical singularities can be produced when performing inversion with the Tilt-Euler deconvolution owning to the derivatives of TDR being incalculable when the horizontal derivative is zero. The improved Tilt-Euler deconvolution provided an efficient way to eliminate analytical singularities and obtain more stable solutions. The results from the theoretical model show that the GTilt-depth method and improved Tilt-Euler deconvolution could be applied to calculate the buried depths more accurately and effectively. Application of these methods shows that they are able to capture more detailed features, and provide more straightforward and accurate results of depth, than traditional methods. Furthermore, the results obtained from the gravity data in Sichuan Basin show that the basement depth ranges from 3 to 11 km, and 3 to 7 km in the central uplift, which contains a local depression with a depth of 8 km. The basement exhibits a general pattern of “shallow in middle and deep in east and west”, which is consistent with the results revealed by gravityseismic jointly interpreted profile. This research provides a better indication of the basement structure when interpreting the regional geology in Sichuan Basin.

2

Lineaments in the Shamakhy–Gobustan and Absheron Hydrocarbon Containing Areas Using Gravity Data

Elmas A., Karsli H., Kadirov F. A.

Acta Geophysica

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2018

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Vol. 66, no. 1

39--49

EN

In this study, we purposed to investigate the edge of geostructures and position of existing faults of the Shamakhy–Gobustan and Absheron hydrocarbon containing regions in Azerbaijan. For this purpose, the horizontal gradient, analytic signal, tilt angle, and hyperbolic of tilt angle methods were applied to the first vertical derivative of gravity data instead of Bouguer gravity data. We obtained the maps that show the previous lineaments which were designated by considering the maximum contours of horizontal gradient, analytic signal maps, and zero values of tilt angle, hyperbolic of tilt angle maps. The geometry of basement interface was also modeled utilizing the Parker–Oldenburg algorithm to understand the sediment thickness and coherency or incoherency between the gravity values and basement topography. The lineaments were held a candle to most current tectonic structure map of the study area. It was seen that the techniques used in this study are very effective to determine the old and new lineaments in the Shamakhy–Gobustan and Absheron regions. The epicenter distribution of earthquakes within the study area supports the new lineaments which are extracted by our interpretation. We concluded that better comprehension of Azerbaijan geostructures and its effect on the large scale works will be provided by means of this study.

3

Wpływ kąta pochylenia krawędzi skrawającej frezu na składowe siły skrawania i amplitudy przyspieszenia drgań

Burek J., Żyłka Ł., Płodzień M., Sułkowicz P., Buk J.

Mechanik

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2017

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R. 90, nr 11

971--973

PL

Przedstawiono wpływ kąta pochylenia krawędzi skrawającej frezu na składowe siły skrawania oraz amplitudy przyspieszenia drgań w układzie przedmiotu obrabianego w procesie frezowania wysokowydajnego stopu aluminium frezem o falistym zarysie krawędzi skrawającej.

EN

The influence of the cutting edge helix angle of the end milling cutter on the cutting force components and vibration acceleration amplitude in the workpiece coordinate system was determined during the high performance milling of aluminum alloy using the cutter with a corrugated cuttingedge.

4

Wpływ kąta pochylenia krawędzi skrawającej frezu na proces odprowadzania wiórów ze strefy skrawania

Burek J., Żyłka Ł., Płodzień M., Sułkowicz P., Buk J.

Mechanik

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2017

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R. 90, nr 11

962--964

PL

Przedstawiono wpływ kąta pochylenia krawędzi skrawającej frezu walcowo-czołowego na proces odprowadzania (kąt i prędkość) wiórów ze strefy skrawania podczas wysoko wydajnego frezowania stopu aluminium AlZn5.5MgCu.

EN

The influence of the cutting edge helix angle of the end milling cutter on the chips removal process (angle and velocity) from the cutting zone during high-performance milling of AlZn5.5MgCu aluminum alloy is presented.

5

Power control of a wind energy based on a DFIG by sliding mode approach and pitch angle optimal control by genetic algorithm

Belghazi O., Douiri R., Cherkaoui M.

Journal of Achievements in Materials and Manufacturing Engineering

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2016

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Vol. 74, nr 2

78--85

EN

Purpose: In this paper, a regulate of a variable wind energy conversion system, based on a doubly fed induction generator DFIG is proposed, the system we considered is controlled to generate maximum energy while minimizing loads. In low to medium wind speeds, the generator and the power converter control the wind turbine to capture maximum energy from the wind, in the high-wind-speed regions, the wind turbine is controlled to maintain the aerodynamic power produced by the wind turbine. Generator torque and Pitch angle are controlled simultaneously to maximize energy capture. Design/methodology/approach: Two methods for adjusting the aerodynamic power have been studied: For generator load control, The DFIG control structure contains rotor currents and stator powers loops where PI controllers are used. This control could be obtained by applying a DFIG active and reactive power decoupling strategy based on stator flux orientation method, Another controller based on a sliding mode theory is adopted to maximize the extracted power has been used , both of which are employed to regulate the operation of the DFIG. For the pitch control, a nonlinear controller based on artificial intelligence techniques: genetic algorithms, to regulate the blade pitch angle and rotate speed of the wind turbine system. Findings: Proposed DFIG and pitch control algorithms provide good static and dynamic performances. Validity the strategies proposed was analyzed by simulations. Originality/value: The intelligent controller is proposed to blade pitch position control above the rated wind speed in this paper; Genetic Algorithm based controller gave better results. Simulated wind turbine parameters are obtained from a real turbine and generating system. Hence, proposed controllers can be easily adapted to real time applications and operated with real wind turbines. Compared simulation results validate the proposed method in the paper is an effective method.

6

Interpretation of Gravity Data using 3D Euler Deconvolution, Tilt Angle, Horizontal Tilt Angle and Source Edge Approximation of the North-West Himalaya

Ghosh G. K.

Acta Geophysica

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2016

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Vol. 64, no. 4

1112--1138

EN

The collision of the Indian plate and the Eurasian plate created shortening and imbrications with thrusting and faulting which influences northward tectonic movement. This plate movement has divided the Himalaya into four parts, viz. Outer Himalaya, Lesser Himalaya, Greater Himalaya, and Tethys Himalaya. The crystalline basement rock plays an imperative role for structural and tectonic association. The study has been carried out near Rishikesh-Badrinath neighborhood in the northwestern part of the Himalayan girdle with multifarious tectonic set up with thrusted and faulted geological setting. In this study area, 3D Euler deconvolution, horizontal gradient analysis, tilt angle (TILT) and horizontal tilt angle (TDX) analysis have been carried out using gravity data to delineate the subsurface geology and heterogeneity in the northwestern part of Himalaya. The Euler depth solutions suggest the source depth of about 12 km and various derivative analyses suggest the trend of the delineation thrust-fault boundaries along with the dip and strike direction in the study area.

7

Pozycjonowanie modułu fotowoltaicznego w jednoosiowym układzie nadążnym

Bugała A., Frydrychowicz-Jastrzębska G.

Poznan University of Technology Academic Journals. Electrical Engineering

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2015

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No. 81

153--160

PL

W pracy przedstawiono możliwości zwiększenia wydajności konwersji fotowoltaicznej w wyniku zastosowania elektromechanicznego układu jednoosiowej zmiany położenia modułu fotowoltaicznego, "śledzenia za Słońcem". Przedstawiono projekt oraz fizyczną realizację stanowiska badawczego. Porównano charakterystyki prądowo – napięciowe oraz charakterystyki mocy elektrycznej, wyznaczone w warunkach naturalnego oświetlenia, dla konfiguracji stacjonarnej z optymalnym całorocznym kątem pochylenia oraz nadążnej.

EN

The paper presents a discussion on increasing the efficiency of obtaining solar energy using one - axis electromechanical tracking system changing the position of the photovoltaic module according to the Sun movement. A design and implementation of a prepared stand are presented. The current - voltage and power – voltage characteristics are compared for measurements in real conditions, for fixed configuration with optimal annual tilt angle and for tracking unit.

8

Badanie wpływu położenia kątowego i wydajności wybranego działka pożarniczego na proces rozpadu prądu zwartego na strumień rozpylony

Gała J., Koszykowski R.

Logistyka

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2014

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nr 6

3736--3747

PL

W artykule zaprezentowano badania wpływu wybranych parametrów eksploatacyjnych działka wodnopianowego takich jak wydatek i kąt ustawienia względem poziomu na niektóre parametry istotne z punktu widzenia skuteczności gaśniczej takie jak: zasięg rzutu prądu zwartego, powierzchnia zraszania oraz odległość od wylotu, gdzie następuje wyraźny rozpad prądu zawartego na krople. Przedmiotem badań było stosunkowo często stosowane w PSP uniwersalne działko wodno-pianowe DWP – 24 Azimutor 3000. W pracy omówiono przebieg badań i podano sposób wyznaczania ww. wielkości. W postaci tabelarycznej i graficznej przedstawiono otrzymane wyniki w postaci zasięgów rzutu, powierzchni zraszania i odległości rozpadu strumienia na krople dla trzech różnych wydatków 1000, 2000 i 2400 dm3/min oraz dziewięciu różnych kątów pochylenia działka w zakresie 20-60° co 5°. Przeprowadzono analizę wyników i sformułowano wnioski, mające wymiar praktyczny w sensie wskazówek dla strażaków operujących zwartymi prądami wodnymi. Najistotniejszy z nich jest taki, że największą skuteczność gaśniczą badane działko osiągnęło przy następujących parametrach: wydatku – 2400 dm3/min i kącie pochylenia działka - 45°.

EN

The paper presents a study on the impact of selected operating parameters of water-foam monitor such as output and inclination angle on some parameters significant from extinguishing point of view such as maximum range of solid jet, sprinkling area and the distance from the outlet, where the decomposition of the solid jet into drops takes place. The object of the study was universal modern foam-water monitor DWP - 24 Azimutor 3000 frequently used in PSP. The experiments carried out are described in the paper. A method for determining the parameters mentioned above are also given. Results obtained are presented in the form of time-functions of the throw range, sprinkling area and the distance from outlet to the point of decomposition for three different outputs: 1000, 2000 and 2400 dm3/min, and nine different inclination angles of the tested foam-water monitor in the range of 20-60 ° every 5 °. The proper values are also included in the tables. An analysis of the results has been performed and conclusions were formulated. They have a practical importance for firefighters operating solid jets. The most important of them is that the most effective fire extinguishing effect was reached at the following input parameters: flow rate - 2400 dm3/min and an inclination angle - 45 °.

9

Wyznacznie kąta pochylenia i przechylenia w tanich systemach nawigacji lądowej

Popowski S.

Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika

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2007

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z. 71 [238]

365-372

PL

Systemy nawigacji stosowane powszechnie w transporcie samochodowym zwykle sprowadzają się do układu nawigacji satelitarnej uzupełnionego prostym układem nawigacji zliczeniowej. Ten ostatni najczęściej wykonany jest w tzw. konfiguracji minimalnej, obejmującej jeden jednoosiowy giroskop światłowodowy, dwa przyspieszeniomierze i licznik drogi. W pracy przedstawiona została dyskusja metody pomiaru kątów: pochylenia i przechylenia pojazdu w takim uproszczonym systemie nawigacji. Omówiono mechanizmy powstawania błędów nawigacji, których źródłem są niedokładności pomiaru tych kątów. Przedstawione metody zostały zweryfikowane doświadczalnie podczas eksperymentów, których wynik zamieszczono w pracy.

EN

Navigation systems commonly used in automobile transport are usually limited to a satellite navigation system completed with simple dead reckoning navigation system. The latter most often is built in so called "minimal configuration" containing one single axis optic fiber gyroscope, two accelerometers and dead reckoning. The paper discusses the method of angle measurement: pitch and roll of the vehicle in such a simplified navigation system. Also the mechanism of navigation errors occurrence resulting from angle measurements inaccuracy is analysed. Presented methods were verified experimentally and the results are included in the paper.