Two control systems (PES) are used to complete the CRCS control system for the catalyst circulation regeneration of the continuous reforming unit in a plant, one is to control PES (AB rslogix 5) and the other is to pr...Two control systems (PES) are used to complete the CRCS control system for the catalyst circulation regeneration of the continuous reforming unit in a plant, one is to control PES (AB rslogix 5) and the other is to protect PES (triocn TMR V9). The protection PES is mainly used to complete the safety interlock control and start stop sequence control for the cold and hot shutdown of the regeneration unit, as well as the control of heater and solenoid valve. The control part includes the linear rate of spent product lifting, the sequence control of catalyst lock hopper and the circulation alarm control part. Due to the aging of the control system (which has been running continuously for more than 10 years), no spare parts are available. Due to the technical limitations at that time, the original control system structure was scattered, the system interface was complex, and the communication technology was lagging behind. The program management of the original process package is relatively closed (black box), and it is almost impossible to check the fault. The technical service of the original manufacturer lags behind, and the system has potential safety hazards, so the normal maintenance is difficult, so the old system is transformed.展开更多
目的:本研究基于前列腺癌、肺癌、CRC和卵巢癌筛查试验(PLCO)的数据,探讨了维生素(Vit) B族亚型(VitB2、B3、B6、B9和B12)摄入量与结直肠癌(CRC)及其不同亚部位发病风险之间的关系。方法:研究纳入98,400名年龄在55至74岁之间的男性和女...目的:本研究基于前列腺癌、肺癌、CRC和卵巢癌筛查试验(PLCO)的数据,探讨了维生素(Vit) B族亚型(VitB2、B3、B6、B9和B12)摄入量与结直肠癌(CRC)及其不同亚部位发病风险之间的关系。方法:研究纳入98,400名年龄在55至74岁之间的男性和女性,使用Cox回归模型评估了Vit摄入量与CRC发病率之间的关联。结果:研究发现,维生素B族亚型摄入量与CRC发病率显著负相关,且作用在不同亚部位表现出差异性。例如,VitB2和VitB6对直肠癌的保护作用显著,VitB9和VitB12则显著降低近端结肠癌的风险。此外,研究还揭示了BMI对Vit保护作用的调节效应,VitB6对BMI较低人群具有更强的保护作用,而VitB9在BMI较高人群中的保护作用更加显著。不吸烟人群中VitB9的保护作用也得到了进一步确认。补充剂来源的VitB9和VitB12与CRC风险显著负相关,而饮食来源的VitB2、B3和B6未表现出显著影响。结论:研究发现支持了VitB族在CRC预防中的潜在作用,并强调了个性化营养干预的重要性,并为CRC的预防策略和健康政策提供了重要依据。Objective: This study, based on data from the Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial (PLCO), explored the relationship between the intake of B-vitamin subtypes (VitB2, B3, B6, B9, and B12) and the risk of colorectal cancer (CRC) and its various subsite incidences. Methods: The study included 98,400 men and women aged 55 to 74. Cox regression models were used to assess the association between vitamin intake and CRC incidence. Results: The study found a significant negative correlation between B-vitamin intake and CRC incidence, with varying effects across different subsites. For instance, VitB2 and VitB6 were significantly protective against rectal cancer, while VitB9 and VitB12 were significantly associated with reduced risk of proximal colon cancer. Additionally, the study revealed a moderating effect of BMI on the protective role of vitamins. VitB6 showed stronger protective effects in individuals with lower BMI, while VitB9 exhibited a more pronounced protective effect in those with higher BMI. The protective effect of VitB9 in non-smokers has also been further confirmed. Supplement-derived VitB9 and VitB12 were significantly negatively associated with CRC risk, while dietary VitB2, B3, and B6 showed no significant effects. Conclusion: The study supports the potential role of B-vitamins in CRC prevention, emphasizing the importance of personalized nutritional interventions. It provides crucial evidence for CRC prevention strategies and health policies.展开更多
文摘Two control systems (PES) are used to complete the CRCS control system for the catalyst circulation regeneration of the continuous reforming unit in a plant, one is to control PES (AB rslogix 5) and the other is to protect PES (triocn TMR V9). The protection PES is mainly used to complete the safety interlock control and start stop sequence control for the cold and hot shutdown of the regeneration unit, as well as the control of heater and solenoid valve. The control part includes the linear rate of spent product lifting, the sequence control of catalyst lock hopper and the circulation alarm control part. Due to the aging of the control system (which has been running continuously for more than 10 years), no spare parts are available. Due to the technical limitations at that time, the original control system structure was scattered, the system interface was complex, and the communication technology was lagging behind. The program management of the original process package is relatively closed (black box), and it is almost impossible to check the fault. The technical service of the original manufacturer lags behind, and the system has potential safety hazards, so the normal maintenance is difficult, so the old system is transformed.
文摘目的:本研究基于前列腺癌、肺癌、CRC和卵巢癌筛查试验(PLCO)的数据,探讨了维生素(Vit) B族亚型(VitB2、B3、B6、B9和B12)摄入量与结直肠癌(CRC)及其不同亚部位发病风险之间的关系。方法:研究纳入98,400名年龄在55至74岁之间的男性和女性,使用Cox回归模型评估了Vit摄入量与CRC发病率之间的关联。结果:研究发现,维生素B族亚型摄入量与CRC发病率显著负相关,且作用在不同亚部位表现出差异性。例如,VitB2和VitB6对直肠癌的保护作用显著,VitB9和VitB12则显著降低近端结肠癌的风险。此外,研究还揭示了BMI对Vit保护作用的调节效应,VitB6对BMI较低人群具有更强的保护作用,而VitB9在BMI较高人群中的保护作用更加显著。不吸烟人群中VitB9的保护作用也得到了进一步确认。补充剂来源的VitB9和VitB12与CRC风险显著负相关,而饮食来源的VitB2、B3和B6未表现出显著影响。结论:研究发现支持了VitB族在CRC预防中的潜在作用,并强调了个性化营养干预的重要性,并为CRC的预防策略和健康政策提供了重要依据。Objective: This study, based on data from the Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial (PLCO), explored the relationship between the intake of B-vitamin subtypes (VitB2, B3, B6, B9, and B12) and the risk of colorectal cancer (CRC) and its various subsite incidences. Methods: The study included 98,400 men and women aged 55 to 74. Cox regression models were used to assess the association between vitamin intake and CRC incidence. Results: The study found a significant negative correlation between B-vitamin intake and CRC incidence, with varying effects across different subsites. For instance, VitB2 and VitB6 were significantly protective against rectal cancer, while VitB9 and VitB12 were significantly associated with reduced risk of proximal colon cancer. Additionally, the study revealed a moderating effect of BMI on the protective role of vitamins. VitB6 showed stronger protective effects in individuals with lower BMI, while VitB9 exhibited a more pronounced protective effect in those with higher BMI. The protective effect of VitB9 in non-smokers has also been further confirmed. Supplement-derived VitB9 and VitB12 were significantly negatively associated with CRC risk, while dietary VitB2, B3, and B6 showed no significant effects. Conclusion: The study supports the potential role of B-vitamins in CRC prevention, emphasizing the importance of personalized nutritional interventions. It provides crucial evidence for CRC prevention strategies and health policies.
