996 research outputs found
Embroidered Coils for Magnetic Resonance Sensors
Magnetic resonance imaging is a widely used technique for medical and materials imaging. Even though the objects being imaged are often irregularly shaped, suitable coils permitting the measurement of the radio-frequency signal in these systems are usually made of solid copper. One problem often encountered is how to ensure the coils are both in close proximity and conformal to the object being imaged. Whilst embroidered conductive threads have previously been used as antennae in mobile telecommunications applications, they have not previously been reported for use within magnetic resonance. In this paper we show that an embroidered single loop coil can be used in a commercial unilateral nuclear magnetic resonance system as an alternative to a solid copper. Data is presented showing the determination of both longitudinal (T1) and effective transverse (T2eff) relaxation times for a flat fabric coil and the same coil conformed to an 8 cm diameter cylinder. We thereby demonstrate the principles required for the wider use of fabric based conformal coils within nuclear magnetic resonance and magnetic resonance imaging
ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ Π°Π»Π³ΠΎΡΠΈΡΠΌΠΎΠ² Π»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²ΡΠ²ΠΎΠ΄Π°
Decision support systems give an opportunity to Β«ascertainedΒ« information outputappropriate of user needs.SemanticV1.5beta package meant for representation and visualization knowledge by way of semantic network, as well as access to knowledge base on the graphical interface and query language.This article gives information about test and performance of indexing approach facts, realizedin SemanticV1.5beta
ΠΡΠΎΠ΄ΠΎΠ²ΠΎΠ»ΡΡΡΠ²Π΅Π½Π½Π°Ρ Π±Π΅Π·ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΡ - ΠΎΠ±ΡΠ·Π°ΡΠ΅Π»ΡΠ½ΠΎΠ΅ ΡΡΠ»ΠΎΠ²ΠΈΠ΅ ΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΠ³ΠΎ ΡΠ°Π·Π²ΠΈΡΠΈΡ ΡΡΡΠ°Π½Ρ
Π ΡΠ°Π±ΠΎΡΠ΅ Π΄Π°Π΅ΡΡΡ ΠΊΡΠ°ΡΠΊΠΎΠ΅ ΠΎΠΏΠΈΡΠ°Π½ΠΈΠ΅ ΠΏΡΠΎΠ±Π»Π΅ΠΌΠ΅ ΠΏΡΠΎΠ΄ΠΎΠ²ΠΎΠ»ΡΡΡΠ²Π΅Π½Π½ΠΎΠΉ Π±Π΅Π·ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΠΈ. ΠΡΠ΅Π΄Π»Π°Π³Π°Π΅ΡΡΡ ΠΌΠ΅Ρ
Π°Π½ΠΈΠ·ΠΌ, ΠΏΠΎΠ·Π²ΠΎΠ»ΡΡΡΠΈΠΉ Π½Π° ΠΏΡΠ°ΠΊΡΠΈΠΊΠ΅ ΡΠ»ΡΡΡΠΈΡΡ ΡΡΡΡΠΊΡΡΡΡ ΠΏΠΈΡΠ°Π½ΠΈΡ Π½Π°ΡΠ΅Π»Π΅Π½ΠΈΡ, ΠΏΡΠΈ ΡΡΠΎΠΌ ΡΠ²Π΅Π»ΠΈΡΠΈΡΡ ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΡΡΠ²ΠΎ ΠΎΡΠ΅ΡΠ΅ΡΡΠ²Π΅Π½Π½ΡΡ
ΠΏΡΠΎΠ΄ΡΠΊΡΠΎΠ² ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΠΎΠ³ΠΎ ΠΈ ΡΠΏΠ΅ΡΠΈΠ°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ Π½Π°Π·Π½Π°ΡΠ΅Π½ΠΈΡ.The paper gives a brief description of the problem of food security. A mechanism is proposed that allows in practice to improve the structure of the population's nutrition, while increasing the production of domestic functional and specialized products
ΠΠ»ΠΈΡΠ½ΠΈΠ΅ ΠΌΠΎΠ΄ΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΠΏΠΈΡΠ°ΡΡΠ΅Π³ΠΎ Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΡ Π½Π° ΠΌΠ΅ΠΆΠ²ΠΈΡΠΊΠΎΠ²ΡΡ ΠΈΠ·ΠΎΠ»ΡΡΠΈΡ
ΠΠΏΠΈΡΠ°Π½ΠΈΠ΅ Π½Π°ΡΡΠ½ΠΎ-ΠΊΠ²Π°Π»ΠΈΡΠΈΠΊΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ ΡΠ°Π±ΠΎΡΡ. Π ΡΠ°Π±ΠΎΡΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Ρ ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠΈ ΡΠ»Π΅ΠΊΡΡΠΎΡΠ΅ΠΏΠ»ΠΎΠ²ΠΎΠ³ΠΎ ΡΡΠ°ΡΠ΅Π½ΠΈΡ ΠΈΠ·ΠΎΠ»ΡΡΠΈΠΈ Π½ΠΈΠ·ΠΊΠΎΠ²ΠΎΠ»ΡΡΠ½ΡΡ
ΠΎΠ±ΠΌΠΎΡΠΎΠΊ ΡΠ»Π΅ΠΊΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
Π΄Π²ΠΈΠ³Π°ΡΠ΅Π»Π΅ΠΉ Π² ΡΠΎΡΡΠ°Π²Π΅ ΡΠ°ΡΡΠΎΡΠ½ΠΎ-ΡΠ΅Π³ΡΠ»ΠΈΡΡΠ΅ΠΌΠΎΠ³ΠΎ ΠΏΡΠΈΠ²ΠΎΠ΄Π° ΠΈ ΠΏΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Ρ ΡΠ΅ΠΊΠΎΠΌΠ΅Π½Π΄Π°ΡΠΈΠΈ ΠΏΠΎ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΡ Π½Π°Π΄Π΅ΠΆΠ½ΠΎΡΡΠΈ.Description of scientific qualification work. The features of an electrothermal aging of electric motors low-voltage windings insulation in variable frequency drive are studied and recommendations on reliability improving are proposed in this work
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