Based on such diagnostic measures as clinical diagnosis and lab etiological examination,the disease was diagnosed as Leydig cell tumor in dogs. Combined with the clinical examination results of the dog,testicular tumo...Based on such diagnostic measures as clinical diagnosis and lab etiological examination,the disease was diagnosed as Leydig cell tumor in dogs. Combined with the clinical examination results of the dog,testicular tumor removal operation was conducted,and the prognosis was favorable.展开更多
The eastern foot of Helan Mountain in the Ningxia Hui Autonomous Region stands out as one of the prime grapegrowing regions in China.Owing to the dry,cold,and windy winter climate of the region,it is common practice t...The eastern foot of Helan Mountain in the Ningxia Hui Autonomous Region stands out as one of the prime grapegrowing regions in China.Owing to the dry,cold,and windy winter climate of the region,it is common practice to cover grapevines with soil and form ridges for winter protection.These soil ridges are cleared in the subsequent spring to allow grapevines to grow unhindered.However,conventional dehilling machines often demonstrate a low soil-clearing rate,leaving a significant amount of residual soil behind.This inefficiency necessitates labor-intensive manual soil removal processes.To address this challenge,a scraping-rotating-brushing dehilling machine was designed.The discrete element method(DEM)was utilized to determine the optimal structural parameters for the critical components,including the scraper,rotary blade,and flexible brush.DEM models were constructed for the scraper alone,the scraper-rotary blade combination,and the scraperrotary blade-brush combination to simulate their respective working processes.Through simulation analysis,the optimal combination parameters of the physical prototype were obtained.Field experiments were conducted to measure the clearing rate of the scraping-rotating-brushing dehilling machine,revealing an extremely low relative error of just 0.05%between the DEM simulation results and the field test outcomes.This confirms the accuracy of our DEM model.The success of the DEM model implementation highlights its potential in the design and development of grape soil-clearing machinery.This innovative approach not only reduces the cost associated with prototype development but also provides reference for the research and development of other related agricultural machinery.展开更多
文摘Based on such diagnostic measures as clinical diagnosis and lab etiological examination,the disease was diagnosed as Leydig cell tumor in dogs. Combined with the clinical examination results of the dog,testicular tumor removal operation was conducted,and the prognosis was favorable.
基金financially supported by Key R&D Project of Ningxia Hui Autonomous Region(Grant No.2022BBF02042)Ningxia Natural Science Foundation(Grant No.2022AAC03258).
文摘The eastern foot of Helan Mountain in the Ningxia Hui Autonomous Region stands out as one of the prime grapegrowing regions in China.Owing to the dry,cold,and windy winter climate of the region,it is common practice to cover grapevines with soil and form ridges for winter protection.These soil ridges are cleared in the subsequent spring to allow grapevines to grow unhindered.However,conventional dehilling machines often demonstrate a low soil-clearing rate,leaving a significant amount of residual soil behind.This inefficiency necessitates labor-intensive manual soil removal processes.To address this challenge,a scraping-rotating-brushing dehilling machine was designed.The discrete element method(DEM)was utilized to determine the optimal structural parameters for the critical components,including the scraper,rotary blade,and flexible brush.DEM models were constructed for the scraper alone,the scraper-rotary blade combination,and the scraperrotary blade-brush combination to simulate their respective working processes.Through simulation analysis,the optimal combination parameters of the physical prototype were obtained.Field experiments were conducted to measure the clearing rate of the scraping-rotating-brushing dehilling machine,revealing an extremely low relative error of just 0.05%between the DEM simulation results and the field test outcomes.This confirms the accuracy of our DEM model.The success of the DEM model implementation highlights its potential in the design and development of grape soil-clearing machinery.This innovative approach not only reduces the cost associated with prototype development but also provides reference for the research and development of other related agricultural machinery.
