KIT-5/Beta composite supports were synthesized using an in situ self-assembly hydrothermal method,and NiW/KIT-5/Beta catalysts were prepared by impregnation.A series of characterization techniques were utilized to eva...KIT-5/Beta composite supports were synthesized using an in situ self-assembly hydrothermal method,and NiW/KIT-5/Beta catalysts were prepared by impregnation.A series of characterization techniques were utilized to evaluate the influence of varying hydrothermal synthesis temperatures on the physicochemical properties of both the KIT-5/Beta supports and the resulting catalysts.The catalytic performances of catalysts were evaluated under reaction conditions of 320℃,4 MPa H_(2)pressure,and a weight hourly space velocity(WHSV)of 4.8 h^(-1)for hydrodenitrogenation(HDN)of quinoline.The results indicated that the specific surface area and pore structure of the materials could be effectively regulated by adjusting the hydrothermal synthesis temperature,which in turn influenced the number of active sites on the catalyst.The NiW/KB-125 catalyst,synthesized at 125℃,presented the highest quinoline HDN efficiency(96.8%),which can be attributed to its favorable pore channel structure,greater Brønsted acid number,higher degree of metal sulfidation(80.12%)and appropriate metal-support interaction(MSI).展开更多
NVIDIA Jetson作为先进的嵌入式系统,各行各业的开发人员可以使用它们来构建创新型AI产品。2024年12月,NVIDIA发布了Jetson系列新品—Jetson Orin Nano Super Developer Kit,做为Jetson Nano的升级款,模组售价仅仅249美元,NVIDIA以更加...NVIDIA Jetson作为先进的嵌入式系统,各行各业的开发人员可以使用它们来构建创新型AI产品。2024年12月,NVIDIA发布了Jetson系列新品—Jetson Orin Nano Super Developer Kit,做为Jetson Nano的升级款,模组售价仅仅249美元,NVIDIA以更加亲民的价格,赋予更多领域充足的算力支持。展开更多
胃肠动力障碍性疾病(disorders of gastrointestinal motility,DGIM)是指因胃肠动力失常引起的以消化道症状为主要临床表现的疾病。DGIM的发病率有逐年升高的趋势,降低人们生活质量的同时,还增加了社会的医疗支出。DGIM的发病机制尚未...胃肠动力障碍性疾病(disorders of gastrointestinal motility,DGIM)是指因胃肠动力失常引起的以消化道症状为主要临床表现的疾病。DGIM的发病率有逐年升高的趋势,降低人们生活质量的同时,还增加了社会的医疗支出。DGIM的发病机制尚未完全阐明,多项研究表明其发生发展与胃肠道动力异常关系密切。胃肠动力与胃肠道Cajal间质细胞(ICC)密切相关。ICC是胃肠道产生慢波运动的特殊细胞,ICC数量和形态的保持又与SCF/c-kit信号通路密切相关。近年来的研究表明,SCF/c-kit信号通路的异常改变可导致DGIM的发生。目前,DGIM的西医治疗主要为促动力及抑酸等对症治疗,在一定程度上能够缓解DGIM的症状,但常伴有不良反应,使药物的应用范围受限,而大量研究证实,中药、中药单体或成分、复方、中医外治法均可通过调节SCF/c-kit信号通路,有效改善胃肠动力的同时,不良反应较小。虽然中医药通过调控SCF/c-kit信号通路干预DGIM具有西医难以取代的独特优势,但目前中医药调控SCF/c-kit信号通路治疗DGIM系统综述仍较少。文章就SCF/c-kit信号通路与DGIM之间的相关性、中医药调控SCF/c-kit信号通路干预DGIM的作用机制进行系统性总结,旨在为临床治疗DGIM及新药研发提供新思考。展开更多
The study was carried out in the Tahoua region at the market gardening sites of the Taddis 1 and 2 valley. Small-scale pumping irrigation is one of the most interesting uses of solar energy. The objective of this stud...The study was carried out in the Tahoua region at the market gardening sites of the Taddis 1 and 2 valley. Small-scale pumping irrigation is one of the most interesting uses of solar energy. The objective of this study is to carry out a comparative analysis of two dewatering pumping systems (Solar Kit and GMP) for water mobilization on a certain number of criteria such as sustainable use, economic aspect and performance. To achieve this, the adapted methodology consisted first of all in the development of a data collection tool in the field. Then flow measurements, estimation of fuel consumption, pressure height, etc., were carried out. Thus, the data collection involved a sample of 120 irrigators who had to use the two (2) types of pumping systems. The collected data were analyzed and processed with appropriate software. The results of the study show that the two pumping systems studied have strengths and constraints. Thus, the solar pumping system has a significant investment cost, very low maintenance and a low operating cost. On the other hand, the system with a generator has a relatively low investment cost (25 to 30 times less than solar), but a relatively high operating, upkeep and maintenance cost. He adds that these assets and constraints must be taken into consideration when an investment is made. This study shows that 74% of producers use GMP compared to 26% who use the Solar Kit. But in practice, the Solar Kit is more reliable for producers from the point of view of planted area, environmental management and investment costs, supply of fuel and lubricant. These results indicate better performance of the solar pumping system compared to GMP at the study sites.展开更多
基金Supported by the Autonomous Research Project of SKLCC(2024BWZ003)Strategic Priority Research Program of the Chinese Academy of Sciences(XDA0390401)the Doctoral Research Start-up Funding of Shanxi Institute of Technology(026012).
文摘KIT-5/Beta composite supports were synthesized using an in situ self-assembly hydrothermal method,and NiW/KIT-5/Beta catalysts were prepared by impregnation.A series of characterization techniques were utilized to evaluate the influence of varying hydrothermal synthesis temperatures on the physicochemical properties of both the KIT-5/Beta supports and the resulting catalysts.The catalytic performances of catalysts were evaluated under reaction conditions of 320℃,4 MPa H_(2)pressure,and a weight hourly space velocity(WHSV)of 4.8 h^(-1)for hydrodenitrogenation(HDN)of quinoline.The results indicated that the specific surface area and pore structure of the materials could be effectively regulated by adjusting the hydrothermal synthesis temperature,which in turn influenced the number of active sites on the catalyst.The NiW/KB-125 catalyst,synthesized at 125℃,presented the highest quinoline HDN efficiency(96.8%),which can be attributed to its favorable pore channel structure,greater Brønsted acid number,higher degree of metal sulfidation(80.12%)and appropriate metal-support interaction(MSI).
文摘NVIDIA Jetson作为先进的嵌入式系统,各行各业的开发人员可以使用它们来构建创新型AI产品。2024年12月,NVIDIA发布了Jetson系列新品—Jetson Orin Nano Super Developer Kit,做为Jetson Nano的升级款,模组售价仅仅249美元,NVIDIA以更加亲民的价格,赋予更多领域充足的算力支持。
文摘胃肠动力障碍性疾病(disorders of gastrointestinal motility,DGIM)是指因胃肠动力失常引起的以消化道症状为主要临床表现的疾病。DGIM的发病率有逐年升高的趋势,降低人们生活质量的同时,还增加了社会的医疗支出。DGIM的发病机制尚未完全阐明,多项研究表明其发生发展与胃肠道动力异常关系密切。胃肠动力与胃肠道Cajal间质细胞(ICC)密切相关。ICC是胃肠道产生慢波运动的特殊细胞,ICC数量和形态的保持又与SCF/c-kit信号通路密切相关。近年来的研究表明,SCF/c-kit信号通路的异常改变可导致DGIM的发生。目前,DGIM的西医治疗主要为促动力及抑酸等对症治疗,在一定程度上能够缓解DGIM的症状,但常伴有不良反应,使药物的应用范围受限,而大量研究证实,中药、中药单体或成分、复方、中医外治法均可通过调节SCF/c-kit信号通路,有效改善胃肠动力的同时,不良反应较小。虽然中医药通过调控SCF/c-kit信号通路干预DGIM具有西医难以取代的独特优势,但目前中医药调控SCF/c-kit信号通路治疗DGIM系统综述仍较少。文章就SCF/c-kit信号通路与DGIM之间的相关性、中医药调控SCF/c-kit信号通路干预DGIM的作用机制进行系统性总结,旨在为临床治疗DGIM及新药研发提供新思考。
文摘The study was carried out in the Tahoua region at the market gardening sites of the Taddis 1 and 2 valley. Small-scale pumping irrigation is one of the most interesting uses of solar energy. The objective of this study is to carry out a comparative analysis of two dewatering pumping systems (Solar Kit and GMP) for water mobilization on a certain number of criteria such as sustainable use, economic aspect and performance. To achieve this, the adapted methodology consisted first of all in the development of a data collection tool in the field. Then flow measurements, estimation of fuel consumption, pressure height, etc., were carried out. Thus, the data collection involved a sample of 120 irrigators who had to use the two (2) types of pumping systems. The collected data were analyzed and processed with appropriate software. The results of the study show that the two pumping systems studied have strengths and constraints. Thus, the solar pumping system has a significant investment cost, very low maintenance and a low operating cost. On the other hand, the system with a generator has a relatively low investment cost (25 to 30 times less than solar), but a relatively high operating, upkeep and maintenance cost. He adds that these assets and constraints must be taken into consideration when an investment is made. This study shows that 74% of producers use GMP compared to 26% who use the Solar Kit. But in practice, the Solar Kit is more reliable for producers from the point of view of planted area, environmental management and investment costs, supply of fuel and lubricant. These results indicate better performance of the solar pumping system compared to GMP at the study sites.
