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Wyświetlanie 1-10 z 362
Tytuł:
Local reinforcement of naturally defected structural lumber
Lokalne wzmocnienie naturalnie osłabionego drewna konstrukcyjnego
Autorzy:
Burawska, I.
Jachowicz, P.
Zbiec, M.
Grzeskiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/9176.pdf
Data publikacji:
2014
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
local reinforcement
reinforcement
structural lumber
lumber
wood
timber
knot
bending
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2014, 87
1898-5912
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Flexural behaviour of concrete slabs reinforced with FRP bars in experiments and according to ACI 440.1R guide
Autorzy:
Abramski, M.
Korzeniowski, P.
Tisler, W.
Powiązania:
https://bibliotekanauki.pl/articles/297798.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
basalt fibre
carbon fibre
FRP reinforcement
reinforcement bar
concrete slab
experiment
Opis:
The paper presents research conducted on two concrete slabs reinforced with the carbon composite bars and two other concrete slabs reinforced with basalt composite bars. The carbon bars were plain, while the basalt ones were ribbed. The slabs were experimentally investigated in the flexural state of effort with the concentrated forces applied. The results are compared with the analytical solution proposed in the guide ACI 440.1R-06 of the American Concrete Institute. The calculation procedures in respect of flexure, as well as deflection, as per ACI 440.1R-06, are presented, briefly explained and discussed in the paper. Some suggestions to revise the existing procedures are offered. The authors present and discuss the following results of their experimental investigation: the ultimate capacity of the slabs, their modes of failure, deflections and the strains in reinforcement.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2016, 19(4); 339-357
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deep reinforcement learning overview of the state of the art
Autorzy:
Fenjiro, Y.
Benbrahim, H.
Powiązania:
https://bibliotekanauki.pl/articles/384788.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
reinforcement learning
deep learning
convolutional network
recurrent network
deep reinforcement learning
Opis:
Artificial intelligence has made big steps forward with reinforcement learning (RL) in the last century, and with the advent of deep learning (DL) in the 90s, especially, the breakthrough of convolutional networks in computer vision field. The adoption of DL neural networks in RL, in the first decade of the 21 century, led to an end-toend framework allowing a great advance in human-level agents and autonomous systems, called deep reinforcement learning (DRL). In this paper, we will go through the development Timeline of RL and DL technologies, describing the main improvements made in both fields. Then, we will dive into DRL and have an overview of the state-ofthe- art of this new and promising field, by browsing a set of algorithms (Value optimization, Policy optimization and Actor-Critic), then, giving an outline of current challenges and real-world applications, along with the hardware and frameworks used. In the end, we will discuss some potential research directions in the field of deep RL, for which we have great expectations that will lead to a real human level of intelligence.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2018, 12, 3; 20-39
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of soil strengthening techniques in construction
Autorzy:
Obolewicz, Jerzy
Wądołowska, Edyta
Powiązania:
https://bibliotekanauki.pl/articles/132008.pdf
Data publikacji:
2019
Wydawca:
Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
Tematy:
soil
construction
reinforcement techniques
Opis:
Construction works should be designed, built, maintained and dismantled in accordance with technical and building regulations as well as the principles of technical knowledge ensuring compliance with basic requirements regarding safety, ecology and sustainable use of natural resources. Among these requirements, it is important to secure the foundation of the object on the ground, which is affected by proper recognition of soil and water conditions, knowledge of the behavior of weak soils, selection of the appropriate method of strengthening and improving the subsoil, correct drainage, checking the stability of slopes and slopes, and the selection of appropriate materials for the construction of earthworks.The article describes the basic soil conditions and gives techniques to strengthen the soil, which can be used in the foundation of buildings.
Źródło:
Modern Engineering; 2019, 2; 94-102
2450-5501
Pojawia się w:
Modern Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of capillary hysteresis phenomenon for evaluation of recycling possibility of selected MMC
Autorzy:
Nagolska, D.
Gawdzińska, K.
Powiązania:
https://bibliotekanauki.pl/articles/382242.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
metal matrix composite
saturated reinforcement
reinforcement preform
kompozyt metalowy
zbrojenie nasycone
kształtka
Opis:
Properties of composites made through saturation of ceramic reinforcement preforms with liquid metal are the cause of growing use of these materials. Taking increasing requirements regarding environment protection into consideration, already during design of such materials one should think of a way of their recycling at the end of life. The recycling of these materials is conducted by separation of components. Determining optimal superficial conditions of a recycling system: liquid metal matrix – reinforcement preform – medium enables automatic course of the recycling process, but does not guarantee high yield of metal. With identical superficial conditions of the recycling system and different structure of reinforcement preforms significant differences in metal yield can be obtained. Identification of a type of a capillary present in reinforcement preforms may allow to determine, already during stage of material design, which types of composites will undergo the recycling process better and for which types one has to accept decreased yield of matrix metal. This identification can be done on the basis of an analysis of results obtained during examination conducted with mercury porosimetry, comparing acquired hysteresis graphs with model graphs proposed by de Boer for adsorbent analysis. Considering the analysis of image of structure of examined reinforcement preforms makes the identification process easier and faster.
Źródło:
Archives of Foundry Engineering; 2011, 11, 3 spec.; 145-150
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie nośności na przebicie płyt żelbetowych z różnie ukształtowanym zbrojeniem poprzecznym
Autorzy:
Urban, T.
Krawczyk, Ł.
Gołdyn, M.
Powiązania:
https://bibliotekanauki.pl/articles/390737.pdf
Data publikacji:
2014
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
przebicie
zbrojenie poprzeczne
zakotwienie
kosze zbrojenia
puncture
transverse reinforcement
anchorage
reinforcement baskets
Opis:
W pracy zaprezentowano wyniki badań stref podporowych krępych płyt żelbetowych. Badania obejmowały cztery modele w skali 1:2. Wszystkie modele wykonano z tej samej mieszanki betonowej. Również zbrojenie główne było jednakowe we wszystkich modelach. Celem badań było wykazanie wpływu różnie ukształtowanego zbrojenia poprzecznego na nośność płyt na przebicie. Jeden z modeli był bez zbrojenia poprzecznego i służył jako model porównawczy. W pozostałych płytach zastosowano trzy rodzaje zbrojenia na przebicie: klasyczne strzemiona zamknięte obejmujące pręty zbrojenia głównego, strzemiona umieszczone pomiędzy siatkami zbrojenia głównego oraz zbrojenie w postaci drabinek. Wyniki badań wykazały kilkuprocentowe różnice w nośnościach poszczególnych modeli ze zbrojeniem poprzecznym, a najskuteczniejsze okazały się strzemiona klasycznie kształtowane obejmujące pręty zbrojenia głównego.
The results of support zone thick concrete slabs experimental investigation are presented in the paper. The experimental program consisted of 4 square reinforced concrete flat models to 1:2 scale made of the same concrete with the same dimensions and the same flexural reinforcement. The aim of tests was proved the influence of different transverse reinforcement types on punching shear load capacity. One of the models was a comparative slab made without transverse reinforcement. In the other slabs three types of transverse reinforcement were used: typical stirrups enclosing flexure reinforcement, stirrups situated between flexure reinforcement and ladders. The test results show a few percent difference in load capacity between models with transverse reinforcement, the most effective were typical stirrups enclosing the main reinforcement.
Źródło:
Budownictwo i Architektura; 2014, 13, 3; 193-200
1899-0665
Pojawia się w:
Budownictwo i Architektura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effectiveness of earth structures rein-forcement on mining areas: numerical analysis
Autorzy:
Pachnicz, M.
Rajczakowska, M.
Stefaniuk, D.
Powiązania:
https://bibliotekanauki.pl/articles/89013.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
mining deformations
embankment reinforcement
geosynthetics
Opis:
This paper presents a numerical analysis of a Multi-layer soil structure improved with the use of geosynthetics. Numerical calculations using the finite element method (FEM) in ZSoil program were performed to determine the effectiveness of the applied reinforcement. In the solution of the problem, different boundary conditions were modeled to analyze the influence of several technologies on the construction of a rail road embankment, subjected to the effect of mining works. In the analysis, the applied loads correspond to the II category of the mining area. Mainly, the different load conditions reflect the intensity of the subsidence of the ground surface due to mining. The effectiveness of the soil reinforcement was determined using the comparison of the numerical calculations of displacements and strains for different scenarios. The reinforcement conditions were always contrasted among them and against the rail road embankment without any improvement. The displacements were measured at the surface of the rail road embankment. The slope stability of the embankment was measured using the soil shear strength reduction method (SSR). The obtained results show, that applying the appropriate reinforcement to the soil, the load/bearing capacity and the stability of the earth structure located in a zone of mining influence can be improved considerably.
Źródło:
Mining Science; 2016, 23; 203-214
2300-9586
2353-5423
Pojawia się w:
Mining Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Delayed discounting of pain with and without monetary reward
Autorzy:
Kicman, Paweł
Bąbel, Przemysław
Powiązania:
https://bibliotekanauki.pl/articles/2128122.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
discounting
pain
punishment
reinforcement
reward
Opis:
We investigated the effect of monetary rewards on the rate of pain discounting. Our aim, also, was to understand the effect of previous painful dental experiences on the rate of discounting pain. Two groups (N = 148) completed a discounting task. In the first group, delayed pain was weaker than immediate pain, and in the second group delayed pain was stronger than immediate pain. Two conditions were studied: pain was either accompanied by a monetary reward or not. We found that people preferred immediate pain when it was weaker than delayed pain; however, when delayed pain was stronger than immediate pain, there was no clear preference. In both groups the preference for immediate pain was higher when pain was accompanied by a monetary reward. Previous painful experiences were not related to the rate of discounting. It was concluded that the preference for delayed pain depends on the intensity of pain, and it can be modified by rewards that accompany pain.
Źródło:
Polish Psychological Bulletin; 2017, 4; 464-469
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A compact DQN model for mobile agents with collision avoidance
Autorzy:
Kamola, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/27314243.pdf
Data publikacji:
2023
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
Q‐learning
DQN
reinforcement learning
Opis:
This paper presents a complete simulation and reinforce‐ ment learning solution to train mobile agents’ strategy of route tracking and avoiding mutual collisions. The aim was to achieve such functionality with limited resources, w.r.t. model input and model size itself. The designed models prove to keep agents safely on the track. Colli‐ sion avoidance agent’s skills developed in the course of model training are primitive but rational. Small size of the model allows fast training with limited computational resources.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2023, 17, 2; 28--35
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sprawdzanie zakotwienia zbrojenia stóp fundamentowych według Eurokodu 2
Autorzy:
Urban, T.
Powiązania:
https://bibliotekanauki.pl/articles/160954.pdf
Data publikacji:
2013
Wydawca:
Polski Związek Inżynierów i Techników Budownictwa
Tematy:
fundament
zbrojenie
zakotwienie zbrojenia
Eurokod 2
obliczanie
foundation
reinforcement
reinforcement anchorage
Eurocode 2
calculation
Źródło:
Przegląd Budowlany; 2013, R. 84, nr 5, 5; 55-60
0033-2038
Pojawia się w:
Przegląd Budowlany
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 362

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