Grains are widely present in industrial productions and processing,and are stored in silos.In the silo,auxiliary structures are added to achieve efficient production.However,little effort has been devoted to the influ...Grains are widely present in industrial productions and processing,and are stored in silos.In the silo,auxiliary structures are added to achieve efficient production.However,little effort has been devoted to the influence of the internal structure of the silo on the granular flow.In this work,a silo with a central decompression tube is studied through experimental measurements and discrete element methods.Then,the influences of the central decompression tube on the flow behavior of grains and wall pressure are analyzed.Results show that the grains are in mass flow in the silo without a central decompression tube,while the grains are in funnel flow in the silo with a central decompression tube.Moreover,regardless of whether there is a central decompression tube in the silo,the maximum pressure appears at the top of the conical silo.In the lower part of the silo,the wall pressure of the silo with a central decompression tube is lower than that of the silo without a central decompression tube.Therefore,a silo with a central decompression tube is more conducive to grain storage and discharge than a silo without a central decompression tube.展开更多
AIM:To study the therapeutic efficacy of a new transnasal ileus tube advanced endoscopically for adhesive small bowel obstruction.METHODS:A total of 186 patients with adhesive small bowel obstruction treated from Sept...AIM:To study the therapeutic efficacy of a new transnasal ileus tube advanced endoscopically for adhesive small bowel obstruction.METHODS:A total of 186 patients with adhesive small bowel obstruction treated from September 2007 to February 2011 were enrolled into this prospective randomized controlled study.The endoscopically advanced new ileus tube was used for gastrointestinal decompression in 96 patients and ordinary nasogastric tube(NGT) was used in 90 patients.The therapeutic efficacy was compared between the two groups.RESULTS:Compared with the NGT group,the ileus tube group experienced significantly shorter time for relief of clinical symptoms and improvement in the findings of abdominal radiograph(4.1 ± 2.3 d vs 8.5 ± 5.0 d) and laboratory tests(P < 0.01).The overall effectiveness rate was up to 89.6% in the ileus tube group and 46.7% in the NGT group(P < 0.01).And 10.4% of the patients in the ileus tube group and 53.3% of the NGT group underwent surgery.For recurrent adhesive bowel obstruction,ileus tube was also significantly more effective than NGT(95.8% vs 31.6%).In the ileus tube group,the drainage output on the first day and the length of hospital stay were significantly different depending on the treatment success or failure(P < 0.05).The abdominal radiographic improvement was correlated with whether or not the patient underwent surgery.CONCLUSION:Ileus tube can be used for adhesive small bowel obstruction.Endoscopic placement of the ileus tube is convenient and worthy to be promoted despite the potential risks.展开更多
近年来，我国早产儿的出生率呈逐年上升趋势，由5％上升为8．1％［1］。极低出生体重儿由于贲门括约肌松弛［2］，胃容量小，消化功能弱，易发生呕吐、腹胀，新生儿坏死性小肠结肠炎（N EC ）发病率高。持续胃肠减压是新生儿重症监护室...近年来，我国早产儿的出生率呈逐年上升趋势，由5％上升为8．1％［1］。极低出生体重儿由于贲门括约肌松弛［2］，胃容量小，消化功能弱，易发生呕吐、腹胀，新生儿坏死性小肠结肠炎（N EC ）发病率高。持续胃肠减压是新生儿重症监护室（N IC U ）针对极低出生体重儿采用的一项常用的护理操作技术，减压效果直接影响其病情进展、住院时间、甚至预后。由于极低出生体重儿体表发育不成熟，前额发际模糊不清，采用前额发际到剑突的体表测量不能准确判断胃管置入深度；故本研究采用鼻尖和外耳廓的体表测量标志置入胃管，以探讨适合其胃肠减压时留置胃管的深度，为临床护理提供理论依据。展开更多
基金We would like to acknowledge the finical support by the Key Laboratory of Agro-Products Postharvest Handling,Ministry of Agriculture support(Grant No.KLAPPH2-2017-04).
文摘Grains are widely present in industrial productions and processing,and are stored in silos.In the silo,auxiliary structures are added to achieve efficient production.However,little effort has been devoted to the influence of the internal structure of the silo on the granular flow.In this work,a silo with a central decompression tube is studied through experimental measurements and discrete element methods.Then,the influences of the central decompression tube on the flow behavior of grains and wall pressure are analyzed.Results show that the grains are in mass flow in the silo without a central decompression tube,while the grains are in funnel flow in the silo with a central decompression tube.Moreover,regardless of whether there is a central decompression tube in the silo,the maximum pressure appears at the top of the conical silo.In the lower part of the silo,the wall pressure of the silo with a central decompression tube is lower than that of the silo without a central decompression tube.Therefore,a silo with a central decompression tube is more conducive to grain storage and discharge than a silo without a central decompression tube.
文摘AIM:To study the therapeutic efficacy of a new transnasal ileus tube advanced endoscopically for adhesive small bowel obstruction.METHODS:A total of 186 patients with adhesive small bowel obstruction treated from September 2007 to February 2011 were enrolled into this prospective randomized controlled study.The endoscopically advanced new ileus tube was used for gastrointestinal decompression in 96 patients and ordinary nasogastric tube(NGT) was used in 90 patients.The therapeutic efficacy was compared between the two groups.RESULTS:Compared with the NGT group,the ileus tube group experienced significantly shorter time for relief of clinical symptoms and improvement in the findings of abdominal radiograph(4.1 ± 2.3 d vs 8.5 ± 5.0 d) and laboratory tests(P < 0.01).The overall effectiveness rate was up to 89.6% in the ileus tube group and 46.7% in the NGT group(P < 0.01).And 10.4% of the patients in the ileus tube group and 53.3% of the NGT group underwent surgery.For recurrent adhesive bowel obstruction,ileus tube was also significantly more effective than NGT(95.8% vs 31.6%).In the ileus tube group,the drainage output on the first day and the length of hospital stay were significantly different depending on the treatment success or failure(P < 0.05).The abdominal radiographic improvement was correlated with whether or not the patient underwent surgery.CONCLUSION:Ileus tube can be used for adhesive small bowel obstruction.Endoscopic placement of the ileus tube is convenient and worthy to be promoted despite the potential risks.
文摘近年来，我国早产儿的出生率呈逐年上升趋势，由5％上升为8．1％［1］。极低出生体重儿由于贲门括约肌松弛［2］，胃容量小，消化功能弱，易发生呕吐、腹胀，新生儿坏死性小肠结肠炎（N EC ）发病率高。持续胃肠减压是新生儿重症监护室（N IC U ）针对极低出生体重儿采用的一项常用的护理操作技术，减压效果直接影响其病情进展、住院时间、甚至预后。由于极低出生体重儿体表发育不成熟，前额发际模糊不清，采用前额发际到剑突的体表测量不能准确判断胃管置入深度；故本研究采用鼻尖和外耳廓的体表测量标志置入胃管，以探讨适合其胃肠减压时留置胃管的深度，为临床护理提供理论依据。
