Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 14

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
Wyszukiwano:
w słowach kluczowych:  samples
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
PL
Przedmiotem artykułu są szeroko zakrojone badania systemów ociepleń na bazie EPS z uwzględnieniem pasów MW. Porównano w nim wymagania w zakresie bezpieczeństwa pożarowego w niektórych krajach UE na podstawie normy BS8414-1:2015+A1:2017. Omówiono proces badawczy z uwzględnieniem ściany EPS SYSTEM oraz SYSTEM EPS z nadprożem MW. Przedstawiono wyniki badań w zakresie przebiegu zmian temperatury w trakcie badania obu ścian uwieńczone porównaniem średnich temperatur zmierzonych w czasie badania.
EN
This paper describes large-scale tests on EPS insulation systems with mineral wool strips. It contains a summary of fire safety requirements specified in BS 8414-1:2015+A1:2017 standard, adopted in certain EU countries. It also describes the testing procedure performed for walls with EPS SYSTEM and EPS SYSTEM with lintel insulated with mineral wool. Temperature changes during the test have been analysed and average temperatures measured in the course of the test have been compared.
PL
W artykule przedstawiono opracowany w Instytucie im. V.R. Williamsa rotacyjny kondycjoner przystosowany do tarczowej kosiarki KR-2,1M. Jakość kosiarki z rotacyjnym kondycjonerem została oceniona zgodnie z GOST 28722-90. Charakterystyka skoszonej trawy została zbadana zgodnie z ogólnie przyjętymi metodami prowadzenia eksperymentów polowych. Test przeprowadzono na roślinach pastewnych i na trawie. Podczas badań sprawdzono jakość koszenia przez kosiarkę i oceniono jak koszenie wpłynęło na szybkość wysychania roślin. Oceniono, że rotacyjny kondycjoner jest funkcjonalny, ma prostą konstrukcję i wspomaga pracę kosiarki. Dodatkowo koszty jego produkcji są niskie.
EN
Described developed in the Federal Williams Research Center of Forage Production & Agroecology rotary conditioner with beater working organs to mower КR-2,1М produced on the open jointstock company "Sasovkormmash". Jointed beaters, installed directly on disks of the mower, have a dynamic influence on the stems of plants during mowing. The mower with the developed conditioner is tested in field conditions on the cereal-legume mixture of 1st cut. The quality of the mower with a rotary conditioner was evaluated in accordance with GOST 28722-90. The characteristic of the mown grass was determined in accordance with the generally accepted methods of conducting field experiments with forage crops. mown grass. Data on the quality of processing of plants by experimental working organs and their influence on speed of a dehydration of plants are presented. It was established that the rotary conditioner is functional, has a simple design, low material consumption and, accordingly, cost.
EN
Modern agriculture foresees the implementation of a particular technological operation, according to the appropriate map-task, which is developed pre-based on diverse information. Knowledge of a certain structure of soil cover variability, obtained using information and technical systems of local operational monitoring of the agrobiological state of agricultural lands, allows us to adopt effective operational decisions for efficient management of agrobiological potential of agricultural lands. Obviously, under such conditions there is a need for fundamentally new approaches to agricultural production, which is to ensure the proper quality of technological operations. The quality of the implementation of technological operations is an integral indicator of the efficiency of production of agricultural products within the agrobiological field. The necessary quality of implementation of the basic technological processes in plant growing is provided by the integrated information and technical systems of operational monitoring of the agrobiological state of agricultural lands. This opens new prospects for organic farming using such smart agricultural machines. In connection with it the task is to obtain reliable data on the agrobiological state of the soil environment by reducing the error in determining the magnitude of the electrical conductive properties of the soil, providing individual stabilization of the working electrodes and the mechanism of lifting / lowering the working electrodes, copying inequalities of the soil environment, reducing the intensity of the destruction of the soil structure , selfcleaning of the working contact of the electrode and ensuring the stability of the electrical contact of the electrode with the soil, by instrument design perfection. The task is achieved by using the information and technical system of operational monitoring of the soil environment of the structure to determine the conductive characteristics of the soil environment. The purpose of the research is to determine the critical loading at the loss of stability by thin-walled working electrodes made in the form of working electrodes of various shapes (thin-walled solid, three-spit and four-spindle discs with different thickness of the rim). The information and technical system of localoperational monitoring of agrobiological state of soil environment of different configurations with one-side compression.
EN
Modern agriculture involves the implementation of a particular technological operation, according to the appropriate map-task, which is developed pre-based on diverse information. Knowledge of a certain structure of soil cover variability, obtained using information and technical systems of local operational monitoring of the agrobiological state of agricultural lands, allows us to adopt effective operational decisions for efficient managemen tagrobiological potential of agricultural lands. Obviously, under such conditions, there is a need for fundamentally new approaches to agricultural production, which is to ensure the proper quality of technological operations. The quality of the implementation of technological operations is an integral indicator of the efficiency of production of agricultural products within the agrobiological field. The necessary quality of implementation of the basic technological processes in plant growing is provided by the integrated information and technical systems of operational monitoring of the agrobiological state of agricultural lands. This opens new prospects for organic farming using such "smart" agricultural machines. In connection with this, the task is to obtain reliable data on the agrobiological state of the soil environment by reducing the error in determining the magnitude of the electrical conductive properties of the soil, providing individual stabilization of the working electrodes and the mechanism of lifting / lowering the working electrodes, copying inequalities of the soil environment, reducing the intensity of the destruction of the soil structure , self-cleaning of the working contact of the electrode and ensuring the stability of the electrical contact of the electrode with the soil, by instrument design perfection. The task is achieved by using the information and technical system of operational monitoring of the soil environment of the structure to determine the conductive characteristics of the soil environment. The purpose of this research is to determine the critical loading at the loss of stability by thin-walled working electrodes made in the form of working electrodes of various shapes (thin-walled solid, three-spit and four-spindle discs with different thickness of the rim). Information and technical system of local-operational monitoring of agrobiological state of soil environment of different configurations with one-side compression.
EN
Modern agriculture involves the implementation of a particular technological operation, according to the appropriate map-task, which is developed pre-based on diverse information. Knowledge of a certain structure of soil cover variability, obtained using information and technical systems of local operational monitoring of the agrobiological state of agricultural lands, allows us to adopt effective operational decisions for efficient management of agrobiological potential of agricultural lands. Obviously, under such conditions, there is a need for fundamentally new approaches to agricultural production, which is to ensure the proper quality of technological operations. The quality of the implementation of technological operations is an integral indicator of the efficiency of production of agricultural products within the agrobiological field. The necessary quality of implementation of the basic technological processes in plant growing is provided by the integrated information and technical systems of operational monitoring of the agrobiological state of agricultural lands. In connection with this, the task is to use a fundamentally new class of information and technical systems of local operational monitoring of the agrobiological state of agricultural lands. The task is achieved by using the information and technical system of operational monitoring of the soil environment of the structure to determine the conductive characteristics of the soil environment. The purpose of this research is to develop and substantiate the functional structure, software, writing code and algorithms for managing the executive bodies of the information and technical system of operational monitoring of the agrobiological state of the soil environment of agricultural lands.
EN
Modern agriculture involves the implementation of a particular technological operation, according to the appropriate map-task, which is developed pre-based on diverse information. Knowledge of a certain structure of soil cover variability, obtained using information and technical systems of local operational monitoring of agro-biological state of agricultural lands, allows us to adopt effective operational decisions for efficient management of agro-biological potential of agricultural lands. Obviously, under such conditions, there is a need for fundamentally new approaches to agricultural production,which is to ensure the proper quality of technological operations. The quality of the implementation of technological operations is an integral indicator of the efficiency of production of agricultural products within the agro-biological field. The necessary quality of implementation of the basic technological processes in plant growing is provided by the integrated information and technical systems of operational monitoring of the agro-biological state of agricultural lands. In connection with this, the task is to obtain reliable data on the agro-biological state of the soil environment by reducing the error in determining the magnitude of the conductive properties of the soil, providing individual stabilization of the working electrodes and the mechanism of lifting / lowering working electrodes, copying inequalities of the soil environment, reducing the intensity of the destruction of the soil structure , self-cleaning of the working contact of the electrode and ensuring the stability of the electrical contact of the electrode with the soil, by instrument design perfection. The task is achieved by using the information and technical system of operational monitoring of the soil environment of the structure to determine the conductive characteristics of the soil environment.
EN
Available techniques for dealing with uncertainties in the agro-industrial complex and their use for describing and assessing the adequacy of the decisions taken are incomplete, and often ineffective, as they usually do not take into account the combination of "field-machine-technological material", which prevents acceptance effective solutions for managing agro-biological potential of agricultural land and, as a consequence, obtaining the maximum economic efficiency of agricultural production. Reliable estimation of variables of agricultural production parameters using the "field-machine-technological material" model makes it possible to provide optimal control of available technical equipment (machinery, sowing machines, etc.), agro-biological (humus content, presence of nutrients, micro-and macro elements, etc. in soil or plant ) and technological resources for making adequate decisions and managing agro-biological potential of agricultural lands, which will provide the necessary economic efficiency. The task is achieved by ensuring the proper quality of the implementation of technological operations that are an integral indicator of economic efficiency and allow providing the necessary economic efficiency through optimal and efficient management of technical means for optimal action on the agro-biological potential of the field and the use of available technological resources. Such control is possible with the use of information and technical systems of local operational monitoring, which are located on machine-tractor units and provide effective control of technological operations by acting on the executive bodies of agricultural machines on the basis of data characterizing the agro-biological state of the soil environment. Information and technical systems of local operational monitoring of the agro-biological state of agricultural lands are used in the following cases: - before performing a technological operation, - simultaneously with the implementation of the technological operation (sowing, fertilizer application, etc.), - during the growing season and after harvesting. This opens new prospects for organic farming using such "smart" agricultural machines.
PL
Celem pracy jest opracowanie konceptualnych podejść efektywnego użycia parametrów elektrofizycznych papieru banknotowego w celu prognozowania wytrzymałości na zużycie przyszłego produktu banknotu, a także adaptacje charakterystyk elektrofizycznych banknotów w jakości kryteriów ich wytrzymałości. Zakres pracy obejmował przeprowadzenie analizy czynników wpływających na procesy zużycia banknotów oraz papieru banknotowego; zbadanie strukturalnych zmian papieru pod wpływem mechanicznych deformacji i przyłożonych napięć stałej i zmiennej wielkości oraz właściwości elektrofizycznych papieru banknotowego. W artykule opisano metodologię obiektywnej oceny wytrzymałości banknotów na podstawie kompleksowego wskaźnika zużycia. Ustalono zależność pomiędzy właściwościami elektrofizycznmi papieru banknotowego a stopniem zużycia banknotów. Potwierdzono, że zmiany parametrów elektrofizycznych, które zachodzą w trakcie zużycia papieru banknotowego, na ogół uzależnione są od rodzaju i orientacji włókien celulozowych, właściwości chłonnych papieru, obecności elementów zabezpieczających, sposobu drukowania i stopnia zużycia papieru. Przedstawiono wyniki badań dla papierów stosowanych w produkcji hrywny ukraińskiej (nominał 10 UAH), tenge kazachskich (nominał 200 KZT) i euro (nominał 10 EUR). Ustalono, że w trakcie zużycia papieru banknotowego zwiększa się przenikalność powietrza i porowatość papieru, jak również i względna równoważna wilgotność, co w efekcie powoduje zmniejszenie odporności na zużycie, jak pojedynczych włókien w papierze, tak i papieru w całości. Obserwuje się również zmniejszenie w trakcie zużycia stałej dielektrycznej papieru.
EN
Measuring of the electrophysical properties of banknote paper samples and banknotes after being subjected with process of their simulated deterioration was conducted. Perspective of using electrophysical properties of banknotes and banknote paper for evaluating of their deterioration was presented.
PL
Artykuł prezentuje specjalną technologię wykonania próbek do badań wytrzymałościowych materiałów stosowanych w konstrukcjach lotniczych. Uwzględnia ona specyficzne wymagania dotyczące dokładności i geometrii warstwy wierzchniej próbek do badań wytrzymałości zmęczeniowej. Opisano specjalne urządzenie do ściernej obróbki wykańczającej odcinka po-miarowego oraz wyniki pomiarów uzyskanych dokładności.
EN
The article presents the special technology for manufacturing of the samples for strength tests of materials used in aviation constructions. It considers the specific requirements for accuracy and geometry of the top layer of the samples for strength testing. It describes the special device for abrasive processing for finishing of the tested section and presents the results of measurement of the achieved accuracy.
EN
The paper presents the results of a study on mechanical properties of porcine temporomandibular joint discs. Taking into account anatomical properties, three typical spots were selected for the investigation: the posterior, anterior and central parts of the disc. The main focus was on the influence of samples' preparation on the changes in mechanical properties. Complete undamaged discs, cylindricallycut disc samples of 5 mm in diameter as well as discs of locally broken continuity in the upper layer around the measuring zone were prepared. Periodic compression was applied during testing, by varying the force in a sawtooth control signal. The rate of increasing the force applied equalled 1 N/s with a maximum value of 3 N. Based on the stress and strain characteristics obtained, the object's rigidity, Young's modulus of the samples, and effective Young's modulus of joint discs were calculated. Results showed that the stress and strain characteristics of the discs' substance depend on sample preparation, measurement location and load history within a given number of cycles. Only the fifth load cycle may be considered as stabilized. The most rigid proved to be the posterior part of the disc, as the rigidity of the samples, of an incised disc and of a complete disc in the fifth loading cycle amounted to 117.9 N/mm, 88.8 N/mm and 87.1 N/mm, respectively. A central part of the disc exhibited the lowest rigidity, whose values for the samples, for an incised disc and for a complete disc reached 87.9 N/mm, 70.6 N/mm, and 38.7 N/mm, respectively. Excision of the samples resulted in their dehydration, which led to increased rigidity, as reflected by Young's modulus values. In the posterior part of the disc, the modulus value was 12.56 MPa, while in the anterior part and in the center, these values reached 7.25 MPa and 6.99 MPa, respectively. Excised discs also exhibited dehydration effects during examination. While loading complete discs, the lowest effective values of Young's modulus were obtained, despite the influence of the tissues adjacent to the loaded zone, counteracting deformation. The values were 4.44 MPa, 1.97 MPa and 2.99 MPa for the posterior, central and anterior parts, respectively. Present data allow the conclusion that the error introduced due to breaking the tissue continuity is greater than the error resulting from ignoring substance continuity when applying local loads to an undamaged disc. Therefore, it seems more sensible to adopt the effective Young's modulus values in numerical analyses rather than to apply the results obtained for the samples cut out of discs.
PL
Produkt ziarnisty, będący przedmiotem opróbowania, powinien być jednoznacznie określony, jako populacja generalna jednostek losowania. W danej partii produktu ziarnistego można rozpatrywać statystyczny model bilansu wariancji dla wariancji międzyziarnowej oraz wariancji między wewnątrzpróbkowej. Wariancje między i wewnątrzpróbkowa zależą od poziomu losowności składu próbek pierwotnych. Statystycznym wskaźnikiem wielkości próbki pierwotnej jest liczba tworzących je ziarn i nie powinno się zastępować go - masą lub objętością próbki pierwotnej. Interesujące są zależności między tak interpretowaną wielkością próbki pierwonej, jako jednostki losowania, a wariancją międzyziarnową i stopniem losowości składu próbek pierwotnych. Analogicznie zależności dotyczące tradycyjnie pojmowanej wielkości próbki pierwotnej, dodatkowo muszą uwzględniać średnią masę pojedyńczego ziarna produktu ziarnistego lub średnią przestrzeń zajmowaną przez pojedyńcze jego ziarno. Ważne znaczenie mają badania podejmowane w tym zakresie.
EN
Granular produkt, being sampled, should be explicity specified as a parent population of sampling units. In a given lot of granular product one can consider a ststistical balance model of variances for the intergrain variance as well as intersample and intrasample variances. The intersample and intrasample variances depend on the radomnes degree of primary samples. The number of grains is a statistical index of the primary sample size and it should not be replaced by te mass or volume of the primary sample. The relation between so interpreted primary sample size, as a sampling unit, and intergrain variance and randomnes degree of the primary sample composition is interesting. the analogical relations refering to the traditionnally comprehended primary sample size must take into consideration the average volume occupies by a single grain. Research taten up in this scope are of great importance.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.