目的探讨N,N-二甲基甲酰胺(N,N-dimethylformamide,DMF)暴露对工人免疫系统的影响。方法选取2012年1月—2022年12月张家港市DMF暴露在岗体检的1894名工人为暴露组,选取2022年12月进行噪声单因素暴露的在岗体检人群共1686人为对照组,收...目的探讨N,N-二甲基甲酰胺(N,N-dimethylformamide,DMF)暴露对工人免疫系统的影响。方法选取2012年1月—2022年12月张家港市DMF暴露在岗体检的1894名工人为暴露组,选取2022年12月进行噪声单因素暴露的在岗体检人群共1686人为对照组,收集分析两组人员血常规炎症指标数据,计算分析“中性粒细胞和淋巴细胞比值(neutrophil-to-lymphocyte ratio,NLR)、淋巴细胞与单核细胞比值(lymphocyte-to-monocyte ratio,LMR)、血小板和淋巴细胞比值(platelet-to-lymphocyte ratio,PLR)、全身炎症反应指数(systemic inflammation responseindex,SIRI)、全身免疫炎症指数(systemicimmune-inflammationindex,SII)、全身炎症综合指数(aggregate index of systemic inflammation,AISI)”。结果经短期暴露研究显示,DMF暴露工人血淋巴细胞计数2021—2022年均高于2019年(P<0.05);单核细胞计数在2020年高于2019年(P<0.01);2020年LMR低于2019年(P<0.05);2020年SIRI、AISI高于2019年(P<0.01),2020—2022年红细胞计数、血红蛋白含量均低于2019年(P<0.01)。总体人群分析发现,NLR、PLR、SIRI、SII、AISI均低于对照组(P<0.05)。长期暴露研究发现,单核细胞计数在<5年组高于对照组,>10年组低于对照组(P<0.01);淋巴细胞计数在5~10年组,高于对照组;<5年组中NLR、PLR、LMR、SII低于对照组(P<0.05);在5~10年组,NLR、PLR、SIRI、SII、AISI低于对照组、LMR高于对照组(P<0.05);在>10年组,PLR、LMR高于对照组(P<0.05);在5~10年组,红细胞计数高于对照组(P<0.05);在>10年组,红细胞计数、血红蛋白含量低于对照组(P<0.05)。结论DMF暴露对工人免疫系统有明显的影响,在长期暴露中,比起传统的炎症指标,NLR、LMR、PLR、SIRI、SII、AISI能更好的反应免疫系统的变化。展开更多
In this paper the carbon distribution in the carburized layer of 20CrMnTi steel was studied. The relationship between the depth of a carburized layer and the surface carbon distribution was established. Eddy current t...In this paper the carbon distribution in the carburized layer of 20CrMnTi steel was studied. The relationship between the depth of a carburized layer and the surface carbon distribution was established. Eddy current testing system of the case depth of this carburized steel was built by using ANSYS software as second development platform.展开更多
This paper is concerned with the relation between the compactness and sequential compactness in a topological space or a topological group, and show that the compactness and sequential compactness coincide in a topolp...This paper is concerned with the relation between the compactness and sequential compactness in a topological space or a topological group, and show that the compactness and sequential compactness coincide in a topolpgical group with the axiom (A1).展开更多
In this paper, it is shown that if a local convex space is weakly complete, then it is complete. Moreover, it shows that a local convex space with the axiom （To） is weakly complete（or weakly＊ complete） if and onl...In this paper, it is shown that if a local convex space is weakly complete, then it is complete. Moreover, it shows that a local convex space with the axiom （To） is weakly complete（or weakly＊ complete） if and only if it is finite dimensional.展开更多
With the promotion of China's urbanization construction and the rapid expansion of urban scale, in the face of increasingly crowded urban buildings, how to make effective use of scarce land, do a good job in urban...With the promotion of China's urbanization construction and the rapid expansion of urban scale, in the face of increasingly crowded urban buildings, how to make effective use of scarce land, do a good job in urban greening and improve the living environment of urban residents is a difficult problem that must be solved to promote urbanization construction. Starting from the current situation of forest seedling raising in domestic urban greening projects, this paper systematically analyzes the development and application prospect of urban forest seedling raising technology, hoping to provide reference value for relevant personnel of domestic urban greening projects and help China's urban greening projects achieve better development.展开更多
Seedling raising is not only a basic work in forestry industry, but also a key work. How to use seedling raising technology and manage seedlings is the key to forestry production. Management personnel will generally a...Seedling raising is not only a basic work in forestry industry, but also a key work. How to use seedling raising technology and manage seedlings is the key to forestry production. Management personnel will generally adopt the most advanced science and technology to carry out forestry seedling raising related operations, which can not only reduce the cost, but also improve the planting quality of seedlings. However, the current development level of forestry seedling raising in China is relatively slow, and traditional seedling raising techniques are still used in most forestry operations. The production efficiency of traditional methods is low and the quality of seedlings actually planted is mixed, which hinders the sustainable development of forestry industry. Therefore, based on the analysis of the technical management problems existing in the current forestry seedling raising in our country, this paper puts forward targeted solutions.展开更多
文摘目的探讨N,N-二甲基甲酰胺(N,N-dimethylformamide,DMF)暴露对工人免疫系统的影响。方法选取2012年1月—2022年12月张家港市DMF暴露在岗体检的1894名工人为暴露组,选取2022年12月进行噪声单因素暴露的在岗体检人群共1686人为对照组,收集分析两组人员血常规炎症指标数据,计算分析“中性粒细胞和淋巴细胞比值(neutrophil-to-lymphocyte ratio,NLR)、淋巴细胞与单核细胞比值(lymphocyte-to-monocyte ratio,LMR)、血小板和淋巴细胞比值(platelet-to-lymphocyte ratio,PLR)、全身炎症反应指数(systemic inflammation responseindex,SIRI)、全身免疫炎症指数(systemicimmune-inflammationindex,SII)、全身炎症综合指数(aggregate index of systemic inflammation,AISI)”。结果经短期暴露研究显示,DMF暴露工人血淋巴细胞计数2021—2022年均高于2019年(P<0.05);单核细胞计数在2020年高于2019年(P<0.01);2020年LMR低于2019年(P<0.05);2020年SIRI、AISI高于2019年(P<0.01),2020—2022年红细胞计数、血红蛋白含量均低于2019年(P<0.01)。总体人群分析发现,NLR、PLR、SIRI、SII、AISI均低于对照组(P<0.05)。长期暴露研究发现,单核细胞计数在<5年组高于对照组,>10年组低于对照组(P<0.01);淋巴细胞计数在5~10年组,高于对照组;<5年组中NLR、PLR、LMR、SII低于对照组(P<0.05);在5~10年组,NLR、PLR、SIRI、SII、AISI低于对照组、LMR高于对照组(P<0.05);在>10年组,PLR、LMR高于对照组(P<0.05);在5~10年组,红细胞计数高于对照组(P<0.05);在>10年组,红细胞计数、血红蛋白含量低于对照组(P<0.05)。结论DMF暴露对工人免疫系统有明显的影响,在长期暴露中,比起传统的炎症指标,NLR、LMR、PLR、SIRI、SII、AISI能更好的反应免疫系统的变化。
文摘In this paper the carbon distribution in the carburized layer of 20CrMnTi steel was studied. The relationship between the depth of a carburized layer and the surface carbon distribution was established. Eddy current testing system of the case depth of this carburized steel was built by using ANSYS software as second development platform.
文摘This paper is concerned with the relation between the compactness and sequential compactness in a topological space or a topological group, and show that the compactness and sequential compactness coincide in a topolpgical group with the axiom (A1).
基金Supported by the Scientific Research Fund of Colleges of Inner Mongolia(NJ09180)
文摘In this paper, it is shown that if a local convex space is weakly complete, then it is complete. Moreover, it shows that a local convex space with the axiom （To） is weakly complete（or weakly＊ complete） if and only if it is finite dimensional.
文摘With the promotion of China's urbanization construction and the rapid expansion of urban scale, in the face of increasingly crowded urban buildings, how to make effective use of scarce land, do a good job in urban greening and improve the living environment of urban residents is a difficult problem that must be solved to promote urbanization construction. Starting from the current situation of forest seedling raising in domestic urban greening projects, this paper systematically analyzes the development and application prospect of urban forest seedling raising technology, hoping to provide reference value for relevant personnel of domestic urban greening projects and help China's urban greening projects achieve better development.
文摘Seedling raising is not only a basic work in forestry industry, but also a key work. How to use seedling raising technology and manage seedlings is the key to forestry production. Management personnel will generally adopt the most advanced science and technology to carry out forestry seedling raising related operations, which can not only reduce the cost, but also improve the planting quality of seedlings. However, the current development level of forestry seedling raising in China is relatively slow, and traditional seedling raising techniques are still used in most forestry operations. The production efficiency of traditional methods is low and the quality of seedlings actually planted is mixed, which hinders the sustainable development of forestry industry. Therefore, based on the analysis of the technical management problems existing in the current forestry seedling raising in our country, this paper puts forward targeted solutions.
