Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "spring" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 69
Tytuł:
Natural transverse vibrations of helical springs in sections covered with elastic coatings
Autorzy:
Michalczyk, K.
Powiązania:
https://bibliotekanauki.pl/articles/200869.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
helical spring vibrations
natural frequencies
free transverse vibrations
axially loaded spring
spring with coatings
drgania sprężyny śrubowej
częstotliwości naturalne
wolne wibracje
Opis:
It has been demonstrated in previous studies that local elastomer coatings covering the end coils of helical springs can efficiently reduce the amplitudes of circum-resonant vibrations in such springs. The analysis of the influence that elastic coatings have on the frequencies and modes of natural transverse vibrations of springs is presented in this paper. The concept of the equivalent beam of the Timoshenko type is utilized in calculations of the frequencies and modes of transverse vibrations. The model developed allows users to determine the frequencies and modes of symmetric as well as antisymmetric vibrations of axially loaded springs with elastic coatings of arbitrary length. A comparison of the results obtained using FEM analysis, in which the model represented the actual spring geometry, with the results obtained by means of the presented model indicates its high accuracy.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 6; 949-959
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure Refinement of Spring Steel 51CrV4 after Accelerated Spheroidisation
Autorzy:
Hauserova, D.
Dlouhy, J.
Kotous, J.
Powiązania:
https://bibliotekanauki.pl/articles/352039.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
spring steel
Accelerated Spheroidisation
refinement
hardening
Opis:
Material research of the spring steels tries to meet requirements of the industry, which are mainly higher yield and tensile strength. Steel 51CrV4 is widely used for spring production. Optimization of its properties lies in tensile and yield strength enhancement without decrease in ductility in quenched and tempered state. This can be accomplished by structural refinement. One possible way to refine final quenched and tempered structure is refinement of the soft annealed structure before quenching. The article is devoted to accelerated carbide spheroidisation and refinement (ASR) and subsequent hardening of the 51CrV4 spring steel. Samples with different carbide size were prepared by conventional soft annealing in atmosphere furnace and ASR process by induction heating. Influence of the structural refinement on the properties of quenched and tempered state was studied.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 3; 1473-1477
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inheritance of resistance to Ustilago nuda [Jens.] Rostr. in some spring barley cultivars
Autorzy:
Kozera, W
Roszko, A.
Powiązania:
https://bibliotekanauki.pl/articles/2048145.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
inheritance
Ustilago nuda
barley
resistance
spring barley
Opis:
The inheritance of resistance to loose smut (Ustilago nuda) in seven cultivars of spring barley has been examined. The performed studies showed that, resistance to two different groups of U. nuda races in respect of their virulence is determined by a single allele pair in the cvs. Anoidium and Inerme 2-r and by two allele pairs in the cvs. CI 13 662, Dorsett, Jet and OAC 21. In the cv. Abyssinian, resistance to a group of races 2 is determined by a single allele pair, whereas that to a group of races 4 - by two allele pairs. In all studied cultivars (except Anoidium) the resistance dominates over sensitivity. Resistance to the both studied groups of U. nuda races is determined by similar genes in the cvs. Dorsett and CI 13 662, as well as in Dorsett and OAC21, and additionally to a group of races 4 in the cvs. Abyssinian and OAC 21. No similarity was found between resistance genes in the case of two allele pairs in the cvs. Jet, Abyssinian and CI 13 662 (group of races 4) as well as in Jet, Dorsett and OAC 21 (in both groups of races), and in the case of a single allele pair in the cvs. Inerme-2-rowed and Abyssinian (group races 2).
Źródło:
Journal of Applied Genetics; 1995, 36, 2; 119-127
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enhancement of Surgical Training Practice with the Spring Tensor Heuristic Model
Autorzy:
Chiu, C.
Chaczko, Z.
Powiązania:
https://bibliotekanauki.pl/articles/226752.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
laparoscopic surgical training
spring tensor model
modelling and simulation systems
Opis:
The enhancement of surgical simulation tools is an important research study, to assist in the assessment and feedback of medical training practice. In this research, the Spring Tensor Model (STEM) has been used for laparoscopic end-effector navigation through obstacles and high-risk areas. The modelling of the surgical trainer as part of the laparoscopic simulator seeks to emulate the physical environment as a virtualized representation in the integrated infrastructure. Combining sensor network framework paradigms to a surgical knowledge-based construct demonstrates how STEM can enhance medical practice. The architectural hybridisation of the training framework has enabled the adaptation of STEM modelling techniques for a simulated laparoscopic training methodology. The primary benefit of the architecture is that this integration strategy has resulted in a seamless transition of the heuristic framework to be applied to surgical training.
Źródło:
International Journal of Electronics and Telecommunications; 2013, 59, 3; 237-244
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anther culture ability of spring rye (Secale cereale L.) cultivars
Autorzy:
Mikolajczyk, S.
Broda, Z.
Galczynska, A.
Marut, J.
Powiązania:
https://bibliotekanauki.pl/articles/951281.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
spring rye
Secale cereale
pollination
androgenesis
regeneration
plant potential
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2015, 96, 1
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Health status of spring barley grown in monocrop and in mixtures with cereals or leguminous plants
Autorzy:
Wenda-Piesik, A
Powiązania:
https://bibliotekanauki.pl/articles/65224.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
plant disease
monocrop
health status
barley
leguminous plant
cereal
spring barley
mixture
Opis:
In 1997-1999 observations of health status of spring barley grown in two-component mixtures with cereals or pea were performed in two experiments, differing in the agricultural utility of soil. A much better health status of the studied species was found in the mixed crop than in their pure stand. Two-component mixtures were differentiated in the occurrence of leaf diseases caused by Drechslera teres, Drechslera graminea, Puccinia graminis and P. hordei, Rhynchosporium secalis and Erysiphe graminis. The healthiness of lower parts of stem and roots depended on the quality of soil and mixtures factor. A higher infection due to foot root rot complex was noted on barley cultivated on the poorer soil in homogenous stand.
W latach 1997-1999 prowadzono obserwacje stanu zdrowotnego jęczmienia jarego uprawianego w dwuskładnikowych mieszankach ze zbożami lub z grochem siewnym. Znacznie lepszy stan zdrowotny u badanego gatunku stwierdzono w uprawach mieszanych niż w siewie czystym. Dwuskładnikowe mieszanki istotnie różniły się między sobą występowaniem objawów powodowanych przez: Drechslera teres, Drechslera graminea, Puccinia graminis i P. hordei, Rhynchosporium secalis i Erysiphe graminis. Zdrowotność podstawy źdźbła i korzeni jęczmienia jarego zależała zarówno od jakości stanowiska, jak i uprawy w mieszankach. Wyższe porażenie przez kompleks patogenów zgorzelowych stwierdzano na słabszej glebie w siewach jednogatunkowych.
Źródło:
Journal of Plant Protection Research; 2001, 41, 4
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Noxiousness and control of Qulema spp. larvae in the spring wheat
Autorzy:
Kaniuczak, Z
Powiązania:
https://bibliotekanauki.pl/articles/65811.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
spring wheat
control
wheat
plant protection
production technology
Qulema
cereal leaf beetle
cereal
insecticide
larva
chemical control
noxiousness
Opis:
In 1992-1994 studies were carried on the noxiousness, biological effectiveness and effects of chemical control of cereal leaf beetles (Qulema spp.) on the spring wheat. The larvae most frequently injured flag leaves, damaging them to 74.8%. The reduction of flag leaves surface area ranged 20.8-38.0%. The use of insecticides resulted in the increase of the grain yield by 12.5% on an average.
W latach 1992-1994 przeprowadzono badania nad szkodliwością larw skrzypionek dla roślin pszenicy jarej, biologiczną skutecznością zastosowanych insektycydów oraz efektami produkcyjnymi wykonanych zabiegów. Stwierdzono dużą szkodliwość skrzypionek dla pszenicy jarej. Larwy skrzypionek uszkodziły liście flagowe pszenicy jarej od 56,6% do 92,0%, średnio 74,8%. Redukcja powierzchni liści flagowych wynosiła od 20,8% do 38,0%. Otrzymane wyniki badań wskazują na zróżnicowanie podatności badanych odmian pszenicy jarej na uszkodzenia przez skrzypionki. Uzyskano bardzo dobrą skuteczność zwalczania larw skrzypionek w pszenicy jarej. Najlepszymi insektycydami w ich zwalczaniu były: Karate 025 EC, Fastac 10 EC, Bulldock 025 EC, Alpha Combi 26,25 EC. Stosowanie insektycydów spowodowało przyrost plonu ziarna od 0,4% do 24,8%, a liczba ziaren z kłosa uległa zwiększeniu średnio o 21,1%. Znaczący wpływ zastosowanych insektycydów zaznaczył się w stosunku do masy ziaren z kłosa, w porównaniu do kontroli wzrosła ona od 1,4% do 38,3%. W stosunku do kontroli nastąpił również wzrost masy 1000 ziaren. Wahał się on od 4,0% do 28,4%.
Źródło:
Journal of Plant Protection Research; 1997, 37, 1-2
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Examination of ability to androgenesis of spring wheat genotypes resistant to Fusarium
Autorzy:
Weigt, D.
Nawracala, J.
Popowska, D.
Nijak, K.
Powiązania:
https://bibliotekanauki.pl/articles/80466.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
spring wheat
Fusarium
androgenesis
regeneration
double haploid
plant contamination
mycotoxin
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2012, 93, 2
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on electric spring control method considering noncritical load voltage constraint
Autorzy:
Chen, Y.
Ma, G.
Xu, U.
Zhang, H.
Ju, R.
Powiązania:
https://bibliotekanauki.pl/articles/140516.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electric spring
noncritical load
voltage excursion
reactive power compensation
Opis:
With the increasing penetration rate of grid-connected renewable energy generation, the problem of grid voltage excursion becomes an important issue that needs to be solved urgently. As a new type of voltage regulation control method, electric spring (ES) can alleviate the fluctuations of renewable energy output effectively. In this paper, the background and basic principle of the electric spring are introduced firstly. Then, considering the influence of an electric spring on noncritical load voltage, noncritical loads are classified reasonably, and based on the electric spring phasor diagram, the control method to meet the noncritical load voltage constraint is proposed. This control method can meet the requirements of voltage excursions of different kinds of noncritical load, increase the connection capacity of the noncritical load and improve the voltage stabilization capacity of the electric spring. Finally, through the simulation case, the feasibility and validity of electric spring theory and the proposed control method are verified.
Źródło:
Archives of Electrical Engineering; 2018, 67, 4; 709-724
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variability of seed protein composition of hulless mutants of spring barley [Hordeum vulgare L.]
Autorzy:
Kapala, A
Rybinski, W.
Powiązania:
https://bibliotekanauki.pl/articles/2048149.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
grain
barley
crude fibre
protein
mutant
spring barley
hull
seed
nutritional value
Opis:
Nutritional value of protein in 146 mutants of hulless spring barley was estimated. Evaluation of protein quality was based on the portion of a relative content of protein fractions with different amino acid composition and, therefore, with different nutritional value. The ratio of albumins, globulins and glutelins to hordein, determining nutritional value of protein in the initial genotype was 1.1; in mutants it was within the range of 0.9-1.5. Several mutants with a high protein content and good nutritional value have been distinguished.
Źródło:
Journal of Applied Genetics; 1995, 36, 2; 129-135
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Direct effects of cyclic selection for longer seminal roots in spring barley [Hordeum vulgare L.]
Autorzy:
Gorny, A G
Powiązania:
https://bibliotekanauki.pl/articles/2048122.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
selection
root length
cyclic selection
barley
spring barley
Hordeum vulgare
seminal root
root
realized heritability
Opis:
Cyclic pedigree selection for longer seminal roots was performed in the F₂, F₃ and F₄ generations of hybrid population of spring barley. The total length of roots was measured in seedlings grown in filter-paper rollers. The intensity of selection was 20% (C₁, C₂ cycles) and 26% (C₃). Selection was effective. On an average, the finally selected F₅-pedigrees formed 6% longer seminal root system than the initial F₂'s and much of them exhibited 7-16% improved rooting when compared with the best parent in a sand-vermiculite pot culture. Realized heritabilitiy coefficient of the root length ranged from 0.21 to 0.37 when assessed by the ratio of selection response to selection differential, while those estimated by the parent- offspring regressions attained 0.40-0.53. The obtained results suggest that progeny evaluation and/or selection delayed for later generations should be essential for more effective root selection in barley.
Źródło:
Journal of Applied Genetics; 1995, 36, 1; 17-26
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Differences between organically grown varieties of spring wheat, in response to weed competition and yield
Autorzy:
Feledyn-Szewczyk, B.
Jonczyk, K.
Powiązania:
https://bibliotekanauki.pl/articles/66147.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
competitive ability
organic agriculture
plant variation
spring wheat
wheat
plant response
weed competition
yield
Opis:
When growing wheat, one of the non-chemical methods of weed regulation is to choose wheat varieties which have a high ability to compete with weeds. The first aim of the research was the estimation of the relationships between the morphological features and canopy parameters of six spring wheat varieties. The second aim was the estimation of the varieties’ competitive ability against weeds. The third aim was the estimation of the grain yield of the six varieties. The experiment was carried out in the 2011–2013 time period, on fields which had been organically managed since 1994. Different features affected the weed infestation levels of the spring wheat varieties. For Bombona, negative correlations between the number of weeds and the height, dry matter of wheat, and wheat density, were proved. For Brawura, Hewilla, and Żura, the height, number of tillers, and dry matter of wheat were the main factors influencing weed abundance. A strong negative correlation between the number of weeds and the dry matter of wheat was found for Parabola. Cluster analysis indicated that Bombona and Brawura were the most competitive against weeds, while Monsun and Parabola were characterized as being the least competitive against weeds. Weed number significantly affected the grain yield of spring wheat (r = –0.418). The grain yield was positively correlated with the number of tillers (r = 0.459) and ears (r = 0.355), and the height (r = 0.534) and wheat dry matter (r = 0.411). Bombona and Brawura were the lowest yielding varieties (3.03 and 3.20 t ∙ ha–1, respectively), whereas the highest yield was achieved by Żura (3.82 t ∙ ha–1, on average).
Źródło:
Journal of Plant Protection Research; 2015, 55, 3
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of spray quality produced by different nozzles on efficacy of weed control in spring barley
Autorzy:
Kierzek, R
Powiązania:
https://bibliotekanauki.pl/articles/66747.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
triberenuron-methyl
spray quality
plant protection
efficacy
barley
herbicide dose
nozzle design
spring barley
weed control
Opis:
In four-year experiments the influence of droplet size and nozzle designs on the activity of a commercial herbicides triberenuron-methyl (Granstar 75 WG) and mixture of 2,4 D, dicamba, and mecoprop (Aminopielik Tercet 500 SL) applied to broadleaf weeds in spring barley was examined. The recommended and half doses were applied at 200 and 280 l ha⁻¹ and at 250-570 μm (VMD) diameter droplet sizes, using air inclusion (ID 12003), low drift (TT 11003) and conventional flat fan (11003 XR) nozzles. The results showed that smaller droplet size increased herbicide performance at constant spray volume, regardless of the droplet size range investigated. A significant interaction between the droplet size and herbicide type was observed. Generally, for triberenuron-methyl a performance was increased at smaller droplet size (250-270 μm), but significant increase of herbicide activity only at half dose was obtained. There were no significant interactions between droplet size and performance of mixture 2,4 D, dicamba, and mecoprop.
W badaniach polowych w latach 1996-1999 określano wpływ wielkości kropel na chwastobójcze działanie triberenuron-methyl (Granstar 75 WG) i mieszaniny 2,4 D, dikamba i mekoprop (Aminopielik Tercet 500 SL) w jęczmieniu jarym. W doświadczeniach stosowano zalecane i obniżone o 50% dawki herbicydów w stałych ilościach cieczy użytkowej na hektar tj. 200 i 280 l ha⁻¹. Zróżnicowanie wielkości kropel uzyskano poprzez dobór różnych typów rozpylaczy (standard XR 11003, antyznoszeniowy TT 11003, eżektorowy ID 12003) charakteryzujących się tym samym wydatkiem jednostkowym cieczy przy tym samym ciśnieniu roboczym. Dobór rozpylaczy pozwalał na uzyskanie zróżnicowanej wielkości kropel od 250 do 570 μm (wielkość kropel mierzona wartością VMD). Wyniki badań wskazują, że chwastobójcze działanie herbicydów ulegało zwiększeniu, gdy ciecz użytkowa rozpylana była na mniejsze wielkości kropel z jednoczesnym zachowaniem stałej ilości cieczy użytkowej na hektar. Odnotowano wyraźne różnice w skuteczności chwastobójczej w zależności od wielkości kropel oraz dawki i typu stosowanego herbicydu. Chwastobójcze działanie triberenuron-methyl wzrosło odpowiednio o 18 i 10%, gdy zastosowano krople o wielkości 270 lub 250 μm (XR 11003), w porównaniu do kropel o wielkości 570 i 485 μm (ID 12003). Statystycznie istotny wzrost skuteczności działania tego herbicydu uzyskano w dawce obniżonej o 50% w stosunku do zalecanej. Nie odnotowano istotnego wpływu wielkości kropel, typu rozpylacza na skuteczność działania mieszaniny 2,4 D, dikamba i mekoprop.
Źródło:
Journal of Plant Protection Research; 2002, 42, 1
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical Assessment of a One-Mass Spring-Based Electromagnetic Energy Harvester on a Vibrating Object
Autorzy:
Chiu, M.-C.
Chang, Y.-C.
Yeh, L.-J.
Chung, C.-H.
Powiązania:
https://bibliotekanauki.pl/articles/177720.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
spring
harvester
generator
permanent magnet
simulated annealing
optimization
buckling
Fatigue
Opis:
The paper is an exploration of the optimal design parameters of a space-constrained electromagnetic vibration-based generator. An electromagnetic energy harvester is composed of a coiled polyoxymethylen circular shell, a cylindrical NdFeB magnet, and a pair of helical springs. The magnet is vertically confined between the helical springs that serve as a vibrator. The electrical power connected to the coil is actuated when the energy harvester is vibrated by an external force causing the vibrator to periodically move through the coil. The primary factors of the electrical power generated from the energy harvester include a magnet, a spring, a coil, an excited frequency, an excited amplitude, and a design space. In order to obtain maximal electrical power during the excitation period, it is necessary to set the system’s natural frequency equal to the external forcing frequency. There are ten design factors of the energy harvester including the magnet diameter (Dm), the magnet height (Hm), the system damping ratio (ζsys), the spring diameter (Ds), the diameter of the spring wire (ds), the spring length (ℓs), the pitch of the spring (ps), the spring’s number of revolutions (Ns), the coil diameter (Dc), the diameter of the coil wire (dc), and the coil’s number of revolutions (Nc). Because of the mutual effects of the above factors, searching for the appropriate design parameters within a constrained space is complicated. Concerning their geometric allocation, the above ten design parameters are reduced to four (Dm, Hm, ζsys, and Nc). In order to search for optimal electrical power, the objective function of the electrical power is maximized by adjusting the four design parameters (Dm, Hm, ζsys, and Nc) via the simulated annealing method. Consequently, the optimal design parameters of Dm, Hm, ζsys, and Nc that produce maximum electrical power for an electromagnetic energy harvester are found.
Źródło:
Archives of Acoustics; 2016, 41, 1; 119-131
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 69

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies