21 research outputs found
Multipoint forming using hole-type rubber punch
Reconfigurable multipoint forming is a flexible sheet forming technique aimed at customised sheet metal products. However, one drawback of multipoint forming is the cost and time needed to set up and align the upper and lower pin matrices. This study introduces an optimisation study of a novel hole-type rubber punch replacing the top pin matrix of multipoint incremental forming, aiming to reduce pins setting up and alignment complexity and time. Finite element modelling and design of experiments were used to in-vestigate the effect of hole-type rubber punch configuration such as hole size, hole type, and the compres-sion ratio on the wrinkling, thickness variation, and shape deviation. This research shows that the most significant process parameter in all responses was the hole size. The compression ratio of the material was found to be insignificant in wrinkling and shape deviation. The hole-type rubber punch parameters were found to be a hole size of 9 mm, circular hole type, and a compression ratio of 75%. This experimentally resulted in an improved parts wrinkling of 80%, when compared to using solid rubber punch, with the added benefits of reduction of the cost and time needed to set up and align the pin matrices
Optimization of energy consumption in cotton ginning enterprises using neural network method
In the modern world, energy consumption optimization has become a critical concern across various industries due to environmental considerations and economic efficiency. Cotton ginning enterprises, which play a pivotal role in the textile supply chain, are no exception. This article explores applying neural network methods to optimize energy consumption in cotton ginning enterprises. We delve into the challenges faced by the industry, introduce the concept of neural networks, and discuss their potential to enhance energy efficiency. A case study demonstrates the practical implementation of the neural network approach in a cotton ginning setting, showcasing the potential benefits and providing insights into future directions for sustainable energy practices
ΠΠΏΠ»ΠΈΠ² L-ΠΊΠ°ΡΠ½ΡΡΠΈΠ½Ρ Π½Π° ΠΏΠΎΠΊΠ°Π·Π½ΠΈΠΊΠΈ Π΅Π½Π΄ΠΎΡΠ΅Π»ΡΠ°Π»ΡΠ½ΠΎΡ Π΄ΠΈΡΡΡΠ½ΠΊΡΡΡ Ρ ΡΠ°ΠΊΡΠΎΡΠΈ Π·Π°ΠΏΠ°Π»Π΅Π½Π½Ρ Π² ΠΏΠ°ΡΡΡΠ½ΡΡΠ² ΡΠ· Π³ΠΎΡΡΡΠΈΠΌ ΡΠ½ΡΠ°ΡΠΊΡΠΎΠΌ ΠΌΡΠΎΠΊΠ°ΡΠ΄Π° Π±Π΅Π· Π·ΡΠ±ΡΡ Q
Aim: To evaluate the influence of L-carnitine on inflammatory markers and indicators of endothelial function in patientsΒ with acute myocardial infarction without the Q wave.Materials and Methods: 40 patients with verified diagnosis of AMI without Q-wave. All the patients were matchedΒ by sex, age, weight and duration of the underlying disease. The patients were randomized into 2 groups. The first group ofpatients were on a standard basic therapy and additionally administered L- carnitine at a dose 5g/day, II- group consisted ofΒ patients who did not receive drugs with metabolic action. In dynamics (on the 1st and 10th day of the treatment) the parametersΒ of endothelium vasodilation and markers of inflammation were evaluated.Results: On the background of the basic therapy in both groups an improvement in endothelial function resulting in an increase of brachial artery diameter was observed. However, the L- carnitine vasodilator effect was more pronounced and persistent as compared to group II. In the dynamics, CRP levels and plasma fibrinogen were more pronounced in the Ist group.Π‘ ΡΠ΅Π»ΡΡ ΠΎΡΠ΅Π½ΠΊΠΈ Π²Π»ΠΈΡΠ½ΠΈΡ L-ΠΊΠ°ΡΠ½ΠΈΡΠΈΠ½Π° Π½Π°Β ΠΌΠ°ΡΠΊΠ΅ΡΡ Π²ΠΎΡΠΏΠ°Π»Π΅Π½ΠΈΡ ΠΈ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»ΠΈ ΡΠ½Π΄ΠΎΡΠ΅Π»ΠΈΠ°Π»ΡΠ½ΠΎΠΉ ΡΡΠ½ΠΊΡΠΈΠΈ Ρ ΠΏΠ°ΡΠΈΠ΅Π½ΡΠΎΠ² Ρ ΠΎΡΡΡΡΠΌ ΠΈΠ½ΡΠ°ΡΠΊΡΠΎΠΌΒ ΠΌΠΈΠΎΠΊΠ°ΡΠ΄Π°(ΠΠΠ) Π±Π΅Π· Π·ΡΠ±ΡΠ° Q ΠΎΠ±ΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΎ 40 ΠΏΠ°ΡΠΈΠ΅Π½ΡΠΎΠ² Ρ ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΡΡΡΠΈΠΌ Π΄ΠΈΠ°Π³Π½ΠΎΠ·ΠΎΠΌ. ΠΡΡΠ²Π»Π΅Π½ Π±ΠΎΠ»Π΅Π΅ Π²ΡΡΠ°ΠΆΠ΅Π½Π½ΡΠΉ Π²Π°Π·ΠΎΠ΄ΠΈΠ»Π°ΡΠΈΡΡΡΡΠΈΠΉ ΡΡΡΠ΅ΠΊΡ Π² Π³ΡΡΠΏΠΏΠ΅ L-ΠΊΠ°ΡΠ½ΠΈΡΠΈΠ½Π° Ρ ΠΏΠ°ΡΠ°Π»Π»Π΅Π»ΡΠ½ΡΠΌ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΠ΅ΠΌ ΡΡΠΎΠ²Π½Ρ ΠΌΠ°ΡΠΊΠ΅ΡΠΎΠ² ΡΠΈΡΡΠ΅ΠΌΠ½ΠΎΠ³ΠΎ Π²ΠΎΡΠΏΠ°Π»Π΅Π½ΠΈΡ.Β Π ΠΌΠ΅ΡΠΎΡ ΠΎΡΡΠ½ΠΊΠΈ Π²ΠΏΠ»ΠΈΠ²Ρ L-ΠΊΠ°ΡΠ½ΡΡΠΈΠ½Ρ Π½Π° ΠΌΠ°ΡΠΊΠ΅ΡΠΈ Π·Π°ΠΏΠ°Π»Π΅Π½Π½Ρ ΡΠ° ΠΏΠΎΠΊΠ°Π·Π½ΠΈΠΊΠΈ Π΅Π½Π΄ΠΎΡΠ΅Π»ΡΠ°Π»ΡΠ½ΠΎΡ ΡΡΠ½ΠΊΡΡΡ Π² ΠΏΠ°ΡΡΡΠ½ΡΡΠ² ΡΠ· Π³ΠΎΡΡΡΠΈΠΌ ΡΠ½ΡΠ°ΡΠΊΡΠΎΠΌ ΠΌΡΠΎΠΊΠ°ΡΠ΄Π°(ΠΠΠ) Π±Π΅Π· Π·ΡΠ±ΡΡ Q ΠΎΠ±ΡΡΠ΅ΠΆΠ΅Π½ΠΎ 40 ΠΏΠ°ΡΡΡΠ½ΡΡΠ² Π· Π²ΡΠ΄ΠΏΠΎΠ²ΡΠ΄Π½ΠΈΠΌ Π΄ΡΠ°Π³Π½ΠΎΠ·ΠΎΠΌ. ΠΠΈΡΠ²Π»Π΅Π½ΠΈΠΉ Π±ΡΠ»ΡΡ Π²ΠΈΡΠ°ΠΆΠ΅Π½ΠΈΠΉ Π²Π°Π·ΠΎΠ΄ΠΈΠ»Π°ΡΡΡΡΠΈΠΉ Π΅ΡΠ΅ΠΊΡ Ρ Π³ΡΡΠΏΡ L-ΠΊΠ°ΡΠ½ΡΡΠΈΠ½Ρ Π· ΠΏΠ°ΡΠ°Π»Π΅Π»ΡΠ½ΠΈΠΌ Π·Π½ΠΈΠΆΠ΅Π½Π½ΡΠΌ ΡΡΠ²Π½Ρ ΠΌΠ°ΡΠΊΠ΅ΡΡΠ² ΡΠΈΡΡΠ΅ΠΌΠ½ΠΎΠ³ΠΎ Π·Π°ΠΏΠ°Π»Π΅Π½Π½Ρ
Multipoint Forming Using Hole-Type Rubber Punch
Reconfigurable multipoint forming is a flexible sheet forming technique aimed at customised sheet metal products. However, one drawback of multipoint forming is the cost and time needed to set up and align the upper and lower pin matrices. This study introduces an optimisation study of a novel hole-type rubber punch replacing the top pin matrix of multipoint incremental forming, aiming to reduce pins setting up and alignment complexity and time. Finite element modelling and design of experiments were used to investigate the effect of hole-type rubber punch configuration such as hole size, hole type, and the compression ratio on the wrinkling, thickness variation, and shape deviation. This research shows that the most significant process parameter in all responses was the hole size. The compression ratio of the material was found to be insignificant in wrinkling and shape deviation. The hole-type rubber punch parameters were found to be a hole size of 9 mm, circular hole type, and a compression ratio of 75%. This experimentally resulted in an improved parts wrinkling of 80%, when compared to using solid rubber punch, with the added benefits of reduction of the cost and time needed to set up and align the pin matrices