Wyniki wyszukiwania - Biblioteka Nauki

1

Seismic crustal structure of the Bransfield Strait, West Antarctica

100%

Janik T.

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nr 3-4

2

Awaria pewnego przekrycia strukturalnego w świetle wymagań dotyczących jakości spawania

63%

Szefiner Z. , Janik T.

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tom R. 56, nr 1

41-45

PL

Przedstawiono analizę spawalniczych przyczyn awarii dachu pawilonu meblowego w Szczecinie. Dach w formie stalowego przekrycia strukturalnego wykonany był w wytwórni i zmontowany na placu budowy przez dużą firmę budowlaną w latach 60. ubiegłego stulecia. Stan techniczny konstrukcji skonfrontowano z wymogami jakości dotyczącymi spawania według zawartymi w aktualnych normach PN-EN 1090-2, PN-EN ISO 3834 i PN-EN ISO 14731.

EN

Welding reasons of the failure of the roof on a furniture pavilion in Stettin have been analyzed. The roof in the form of the steel structural cover was made in a factory and then assembled on building site by a large building company in the sixties of the last century. The technical state of the structure was compared with quality requirements relating to welding area specified in the valid standards: PN-EN 1090-2, PN-EN ISO 3834 and PN-EN ISO 14731.

3

Physically based modelling of the double-gate SOI transistor with thin semiconductor film

63%

Majkusiak B. , Janik T.

Electron Technology

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1999

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tom Vol. 32, No. 1/2

29-38

EN

The physically based modelling of the double-gate SOI transistor is addressed in reference to the electron concentration distribution, electron charge density, threshold voltage, electron effective mobility and drain current. Two approaches to the description of the semiconductor region are used - the "classical" model based on solution to the Poisson equation and the "quantum" model based on the self-consistent solution to the Schrodinger and Poisson equation system. A special attention is paid to the influence of the semiconductor film thickness on the D-G SOI MOSFET modelling. Comparison of results obtained from different models for various semiconductor film thicknesses is presented.

4

Rescheduling of arrivals and departures at multi-runway airports

63%

Janik T. , Łebkowski P.

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tom no. 1

43-55

EN

The issues related to the changeability of the environment concerns primarily all the service and production systems. Proper selection of the control tools and their adjustment to the actual system operation conditions decide of the whole system effectiveness. This paper is an attempt at the development of an efficient tool supporting the control of the airplane arrivals and departures at the airports using more than one runways, with the application of the reactive approach.

PL

Problematyka zmienności otoczenia dotyczy wszystkich systemów usługowych i wytwórczych. Odpowiednie dobranie narzędzi sterowania i ich dostosowanie do rzeczywistych warunków funkcjonowania systemu decyduje o efektywności działania systemu. Niniejszy artykuł jest próbą opracowania skutecznego narzędzia wspomagającego sterowanie obsługą przylotów i odlotów samolotów w portach lotniczych z wieloma pasami startowymi przy wykorzystaniu podejścia reaktywnego.

5

Algorytm wyznaczania skali czasu (ziarna) w systemach przybliżonego sterowania ruchem drogowym

63%

Janik T. , Mitas A.

Zeszyty Naukowe. Transport / Politechnika Śląska

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2004

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tom z. 56

297-304

PL

Proces granulacji czasu w systemach sterowania sygnalizacją świetlną związany jest z podziałem dziedziny czasowej na odpowiednie jednostki, dzięki czemu możliwe staje się skalowanie długości trwania poszczególnych faz sygnalizacyjnych. W ten sposób powstają sposobność i perspektywa zarządzania długością cyklu sygnalizacji świetlnej. Celem niniejszego sprawozdania jest przedstawienie modelu, którego zadanie polega na poszukiwaniu takiego ziarna czasowego, aby sygnalizacja świetlna pracująca na granulach czasowych umożliwiała uzyskanie jak najmniejszych strat czasu.

EN

The process of time granulation in traffic lights control systems is related with dividing the time domain into proper units, which permit to size the signal phase interval. Hence that will allow managing the cycle duration of traffic lights at signalized intersection. Introducing such a model that allows finding a proper time granule for traffic lights and letting to get the smallest time losses of vehicles passing the intersection is the objective of the presented report.

6

Badanie wpływu parametrów regulacyjnych automatu sprzęgłowego na ruszanie z miejsca samochodem dla niepełnosprawnych

63%

Wojs J. , Janik T.

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tom R. 101, z. 7-M/2

707--714

PL

W artykule przedstawiono problem drgań wzdłużnych samochodu dla osób niepełnosprawnych z dysfunkcją nóg, wyposażonego w automat sprzęgłowy. Podczas badań trakcyjnych zostały zmierzone wielkości opisujące te drgania w testach ruszania samochodem z miejsca. W szczególności zwrócono uwagę na zmianę przyspieszenia w czasie, czyli zryw. Poprzez odpowiedni dobór wielkości regulacyjnych automatu sprzęgłowego można to niekorzystne zjawisko zrywu ograniczyć. Jest to szczególnie ważne dla niepełnosprawnych kierowców.

EN

The problem of longitudinal vibrations of a car vehicle with an automatic clutch, adopted for a driver with leg motor - malfunction, is presented in the paper. During road tests of a car with commonly used automatic clutch, the phenomenon of annoying longitudinal vibration appears under starting from the stand conditions. This drawback can be eliminated by means of properly adjusted characteristics of the automatic clutch. This problem and some method of its solutions are shown on the basis of the measurement.s results. The investigated phenomenon is essential for disabled drivers, who are strongly affected by rapid changes (jerk) of the longitudinal acceleration at the start of a car movement.

7

2-D seismic models of the lithosphere in the area of the Bransfield Strait, West Antarctica

51%

Grad M. , Guterch A. , Janik T. , Sroda P.

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nr 2

123-151

8

Elektrownia wiatrowa małej mocy do ładowania akumulatorów

51%

Janik T. , Kapinos J. , Mika K.

|

tom Nr 88

191-194

EN

In the paper is presented construction solution of a wind small power plant using synchronous micromachine with permanent magnets. It is assigned for charging batteries of rated voltage of 12 V. Batteries will be used for power supply of electrical radio equipment operating at great distance from power supply network. Due change of wind speed therefore great fluctuations of the output voltage in the system was used the voltage converter. This converter allows for output voltage stabilization at the level of approx. 14 V while generator voltage value changes from 7 to 30 V. The prototype of this equipment has been made and results of its tests have been presented.

9

Modelling of the effective mobility versus effective electric field in the GAA SOI transistor

51%

Walczak J. , Majkusiak B. , Janik T.

Electron Technology

|

1999

|

tom Vol. 32, No. 1/2

119-122

EN

Analytical expressions describing effective electron mobility and effective transverse electric field in the Gate-All Around (GAA) SOI transistor are proposed as functions of silicon substrate thickness, inversion layer charge and averge distance of electrons from the surface.

10

Prediction of I-V characteristics of double-gates SOI MOSFETs with ultrathin semiconductor layer

51%

Janik T. , Majkusiak B. , Jakubowski A.

Electron Technology

|

2000

|

tom Vol. 33, No. 4

567-570

EN

Current-voltage characteristics of the double-gate SOI transistor with ultrathin and undoped semiconductor film are investigated. The charge of channel carriers is calculated with a self-considerent solution of the Schrodinger and Poisson equation system. The obtained charge is introduced into a Pao-Sah-like model of the double-gate SOI transisor to calculate the drain curent. Simulation results show influence of carrier energy quantization and channel overlapping effect on transistor performace.

11

Wpływ uszkodzenia układu prostowniczego na pracę wzbudnicy bezszczotkowej

51%

Janik T. , Kapinos J. , Miksiewicz R.

Zeszyty Naukowe. Elektryka / Politechnika Śląska

|

1999

|

tom z. 168

173-186

PL

W artykule przedstawiono wyniki analizy i badań symulacyjnych wpływu uszkodzenia układu prostowniczego na pracę synchronicznej wzbudnicy bezszczotkowej. Przedstawiono metodę doboru klatki tłumiącej wzbudnicy i określono, w jakim stopniu uszkodzenie układu prostowniczego wzbudnicy wpływa na konieczność przewymiarowania jej obwodu elektromagnetycznego.

EN

Analysis and simulation results of bridge rectifier damages on operation of a brushless exciter have been presented in the paper. A method of choice of the exciter damper winding has been discussed as well. There has been stated how the exciter bridge rectifier damage influences the necessity of redimensioning the exciter electromagnetic circuit.

12

Seismic structure of the lithosphere between the East European Craton and the Carpathians from the net of CELEBRATION 2000 profiles in SE Poland

51%

Janik T. , Grad M. , Guterch A.

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tom Vol. 53, No 1

141-158

EN

During the CELEBRATION 2000 experiment, the area of SE Poland was investigated by relatively dense system of deep seismic sounding profiles. Apart from five main profiles CEL01–CEL05, eight additional profiles were executed between the edge of the East European Craton and the Carphatians: CEL06, CEL11, CEL12, CEL13, CEL14, CEL21, CEL22 and CEL23. In this paper, we present results of modelling of refracted and reflected waves with use of a 2D ray tracing technique. All 13 profiles were jointly inter reted with verification of models at crossing points, and a quasi 3D model of the crust and upper mantle was developed. The obtained P-wave velocity models of the crust and uppermost mantle are very complex and show a differentiation of the seismic structure for tectonic units in SE Poland. The depth of the Moho discontinuity in the investigated area changes from about 30 to about 52 km. As a summary of all seismic models, the Moho depth map for SE Poland is presented, as well as a map of the extent of the most characteristic crustal elements in the area: a high velocity body in the upper crust, division into two- and three-layer consolidated crust, ranges of very deep layers with low velocities in the upper and middle crust, aproximate ranges of detected velocity anisotropy in the upper/middle crust, ranges of the high-velocity lower crust and high-velocity uppermost mantle. Both maps are com pared with the main struc tural el e ments from tec tonic map. This could form the base for a new geotectonic in ter pre ta tion of this com plex area.

13

Various Approaches to Forward and Inverse Wide-Angle Seismic Modelling Tested on Data from DOBRE-4 Experiment

51%

Janik T. , Środa P. , Czuba W. , Lysynchuk D.

|

2016

|

tom Vol. 64, no. 6

1989--2019

EN

The interpretation of seismic refraction and wide angle reflection data usually involves the creation of a velocity model based on an inverse or forward modelling of the travel times of crustal and mantle phases using the ray theory approach. The modelling codes differ in terms of model parameterization, data used for modelling, regularization of the result, etc. It is helpful to know the capabilities, advantages and limitations of the code used compared to others. This work compares some popular 2D seismic modelling codes using the dataset collected along the seismic wide-angle profile DOBRE-4, where quite peculiar/uncommon reflected phases were observed in the wavefield. The ~505 km long profile was realized in southern Ukraine in 2009, using 13 shot points and 230 recording stations. Double PMP phases with a different reduced time (7.5-11 s) and a different apparent velocity, intersecting each other, are observed in the seismic wavefield. This is the most striking feature of the data. They are interpreted as reflections from strongly dipping Moho segments with an opposite dip. Two steps were used for the modelling. In the previous work by Starostenko et al. (2013), the trial-and-error forward model based on refracted and reflected phases (SEIS83 code) was published. The interesting feature is the high-amplitude (8-17 km) variability of the Moho depth in the form of downward and upward bends. This model is compared with results from other seismic inversion methods: the first arrivals tomography package FAST based on first arrivals; the JIVE3D code, which can also use later refracted arrivals and reflections; and the forward and inversion code RAYINVR using both refracted and reflected phases. Modelling with all the codes tested showed substantial variability of the Moho depth along the DOBRE-4 profile. However, SEIS83 and RAYINVR packages seem to give the most coincident results.