It has been commonly accepted that the bulk velocity of extragalactic jets varies in all directions. We examined the synchrotron radiation of a jet with velocity structure in the direction perpendicular to its axis an...It has been commonly accepted that the bulk velocity of extragalactic jets varies in all directions. We examined the synchrotron radiation of a jet with velocity structure in the direction perpendicular to its axis and found that the spectral energy distribution (SED) is not strongly influenced by this circumstance, that there is only a small increase in the emission intensity and almost no shift in the peak frequency. For objects with smaller inclined angles θ<SUB>0</SUB> between the jet axis and the line of our sight, such as Blazars, the effect is more important. When θ<SUB>0</SUB> exceeds a critical value there is no longer any change in the SED. To compare the bulk speed with different velocity structure, an equivalent speed β is defined which would reproduce the same spectral profile. There possibly exists a stress f<SUB>μ</SUB>(y) between layers of the outflow when the velocity is not the same in the jet.展开更多
After the application of PLC in the field of electrical automation of mechanical equipment, its function has been greatly developed, which greatly promotes the development of electrical engineering and its automation ...After the application of PLC in the field of electrical automation of mechanical equipment, its function has been greatly developed, which greatly promotes the development of electrical engineering and its automation control field. It is an application with promoting significance. The automatic control system of mechanical and electrical equipment based on Siemens PLC technology can not only maintain the level of mechanical automation, optimize its comprehensive application efficiency, construct a complete automation application process, achieve the goal of automation application, but also upgrade and transform the technology, so as to lay a solid foundation for the progress of mechanical automation level.展开更多
Since the development of society, the concept of low carbon has become increasingly deeply rooted in the people, and more closely linked with architectural design. Based on their own strength, designers should run the...Since the development of society, the concept of low carbon has become increasingly deeply rooted in the people, and more closely linked with architectural design. Based on their own strength, designers should run the concept of low-carbon through the whole process of architectural design, and effectively study the realization methods of low-carbon and environmental protection buildings, so as to provide people with a modern atmosphere and perfect functional living environment as far as possible. At the same time, we should also fully realize that the advocacy and application of a certain concept is not only the responsibility of the employees in the industry and the industry, but also the content that the relevant national departments and the society need to pay close attention to and advocate together. This paper analyzes this analysis.展开更多
The development of childrens good behavior needs a long-term process step by step, and teachers need to strengthen training with the help of practical teaching activities, so that children can gradually form correct t...The development of childrens good behavior needs a long-term process step by step, and teachers need to strengthen training with the help of practical teaching activities, so that children can gradually form correct thinking habits and have a correct attitude in life, study, labor and moral development. At present, Chinas pre-school education and teaching work stipulates that attention should be paid to the development of childrens comprehensive skills. In the process of preschool education for children, teachers need to pay attention to the development of childrens bodies and habits, so that childrens bodies can develop well and form good behavior habits in study and life, so that children can carefully observe people or things around them and learn the correct practices. In the preschool education stage, children are easily influenced by bad things. If children form bad habits, it is difficult to correct them. Preschool education is an important stage of childrens development, and it is also a key stage for children to develop good behaviors and habits. Therefore, preschool teachers need to strengthen education and guidance for children, so that children can form good habits in life and study, and provide support for the development of childrens good ideological quality. In addition, kindergarten teachers need to strengthen communication with parents, strengthen family education for children, and provide guarantee for childrens comprehensive development.展开更多
Objective: to explore the clinical effect of upper digestive system hemorrhage under gastrointestinal endoscopy. Methods: the 100 patients with massive upper digestive system bleeding hospitalized from February 2018 t...Objective: to explore the clinical effect of upper digestive system hemorrhage under gastrointestinal endoscopy. Methods: the 100 patients with massive upper digestive system bleeding hospitalized from February 2018 to September 2020 were divided into two groups according to the treatment plan, 50 patients underwent gastroscopy, 50 patients received traditional hemostasis, and the results were compared with the time of hemostasis treatment. Results: comparing the efficacy of the two methods, the hemostasis visualization efficiency of 50 patients was 96% compared to 78%;the bleeding duration (0.87 + 0.35) d, admission days (3.4) d;1.89 + 1.12 d in treatment group, 5.8-2.1 d;significant differences between both groups (P 0.05);control patients (P 0.05). Conclusion: in the clinical treatment of patients with upper gastrointestinal bleeding, it can achieve an ideal hemostasis effect in a relatively short time, and has a higher safety value. It is suggested to be widely used in clinical practice.展开更多
With the progress and development of Chinas economy and society, the future society will be the construction project refinement requirements higher and higher, which also leads to the traditional building structure de...With the progress and development of Chinas economy and society, the future society will be the construction project refinement requirements higher and higher, which also leads to the traditional building structure design will be difficult to meet the market demand. Only by strengthening the research and application of BIM technology, can the construction units better ensure the design accuracy of the building structure, so as to promote the overall improvement of the construction engineering efficiency and its degree of refinement. Therefore, the BIM technology should be actively applied in the architectural deepening design to fully improve the overall efficiency of the deepening design.展开更多
: The plant phytohormone cytokinin plays an important role in many facets of plant growth and development by regulating cell division and differentiation. Recent studies have shed significant light into the mechanisms...: The plant phytohormone cytokinin plays an important role in many facets of plant growth and development by regulating cell division and differentiation. Recent studies have shed significant light into the mechanisms of cytokinin metabolism and signaling. However, little is known about how the hormone is transported in planta, although it has been proposed that the hormone is presumably transported in nucleoside-conjugated forms. Here, we report the identification and characterization of cytokinin transporters in Arabidopsis. We previously reported that a gain-of-function mutation in the PGA22/AtIPT8 gene caused overproduction of cytokinins in planta. In an effort to screen for suppressor of pga 22/atipt 8 (soi) mutants, we identified a mutant soi33-1. Molecular and genetic analyses indicated that SOI33 encodes a putative equilibrative nucleoside transporter (ENT), previously designated as AtENT8. Members of this small gene family are presumed to be involved in the transport of nucleosides in eukaryotic cells. Under conditions of nitrogen starvation, loss-of-function mutations in SOI33/AtENT8 or in a related gene AtENT3 cause a reduced sensitivity to the nucleoside-type cytokinins isopentenyladenine riboside (iPR) and transzeatin riboside (tZR), but display a normal response to the free base-type cytokinins isopentenyladenine (iP) and trans-zeatin (tZ). Conversely, overexpression of SOI33/AtENT8 renders transgenic plants hypersensitive to iPR but not to iP. An in planta measurement experiment indicated that uptake efficiency of 3H-labeled iPR was reduced more than 40% in soi33 and atent3 mutants. However, a mutation in AtENT1 had no substantial effect on the cytokinin response and iPR uptake efficiency. Our results suggest that SOI33/ AtENT8 and AtENT3 are involved in the transport of nucleoside-type cytokinins in Arabidopsis.展开更多
基金Supported by the National Natural Science Foundation of China.
文摘It has been commonly accepted that the bulk velocity of extragalactic jets varies in all directions. We examined the synchrotron radiation of a jet with velocity structure in the direction perpendicular to its axis and found that the spectral energy distribution (SED) is not strongly influenced by this circumstance, that there is only a small increase in the emission intensity and almost no shift in the peak frequency. For objects with smaller inclined angles θ<SUB>0</SUB> between the jet axis and the line of our sight, such as Blazars, the effect is more important. When θ<SUB>0</SUB> exceeds a critical value there is no longer any change in the SED. To compare the bulk speed with different velocity structure, an equivalent speed β is defined which would reproduce the same spectral profile. There possibly exists a stress f<SUB>μ</SUB>(y) between layers of the outflow when the velocity is not the same in the jet.
文摘After the application of PLC in the field of electrical automation of mechanical equipment, its function has been greatly developed, which greatly promotes the development of electrical engineering and its automation control field. It is an application with promoting significance. The automatic control system of mechanical and electrical equipment based on Siemens PLC technology can not only maintain the level of mechanical automation, optimize its comprehensive application efficiency, construct a complete automation application process, achieve the goal of automation application, but also upgrade and transform the technology, so as to lay a solid foundation for the progress of mechanical automation level.
文摘Since the development of society, the concept of low carbon has become increasingly deeply rooted in the people, and more closely linked with architectural design. Based on their own strength, designers should run the concept of low-carbon through the whole process of architectural design, and effectively study the realization methods of low-carbon and environmental protection buildings, so as to provide people with a modern atmosphere and perfect functional living environment as far as possible. At the same time, we should also fully realize that the advocacy and application of a certain concept is not only the responsibility of the employees in the industry and the industry, but also the content that the relevant national departments and the society need to pay close attention to and advocate together. This paper analyzes this analysis.
文摘The development of childrens good behavior needs a long-term process step by step, and teachers need to strengthen training with the help of practical teaching activities, so that children can gradually form correct thinking habits and have a correct attitude in life, study, labor and moral development. At present, Chinas pre-school education and teaching work stipulates that attention should be paid to the development of childrens comprehensive skills. In the process of preschool education for children, teachers need to pay attention to the development of childrens bodies and habits, so that childrens bodies can develop well and form good behavior habits in study and life, so that children can carefully observe people or things around them and learn the correct practices. In the preschool education stage, children are easily influenced by bad things. If children form bad habits, it is difficult to correct them. Preschool education is an important stage of childrens development, and it is also a key stage for children to develop good behaviors and habits. Therefore, preschool teachers need to strengthen education and guidance for children, so that children can form good habits in life and study, and provide support for the development of childrens good ideological quality. In addition, kindergarten teachers need to strengthen communication with parents, strengthen family education for children, and provide guarantee for childrens comprehensive development.
文摘Objective: to explore the clinical effect of upper digestive system hemorrhage under gastrointestinal endoscopy. Methods: the 100 patients with massive upper digestive system bleeding hospitalized from February 2018 to September 2020 were divided into two groups according to the treatment plan, 50 patients underwent gastroscopy, 50 patients received traditional hemostasis, and the results were compared with the time of hemostasis treatment. Results: comparing the efficacy of the two methods, the hemostasis visualization efficiency of 50 patients was 96% compared to 78%;the bleeding duration (0.87 + 0.35) d, admission days (3.4) d;1.89 + 1.12 d in treatment group, 5.8-2.1 d;significant differences between both groups (P 0.05);control patients (P 0.05). Conclusion: in the clinical treatment of patients with upper gastrointestinal bleeding, it can achieve an ideal hemostasis effect in a relatively short time, and has a higher safety value. It is suggested to be widely used in clinical practice.
文摘With the progress and development of Chinas economy and society, the future society will be the construction project refinement requirements higher and higher, which also leads to the traditional building structure design will be difficult to meet the market demand. Only by strengthening the research and application of BIM technology, can the construction units better ensure the design accuracy of the building structure, so as to promote the overall improvement of the construction engineering efficiency and its degree of refinement. Therefore, the BIM technology should be actively applied in the architectural deepening design to fully improve the overall efficiency of the deepening design.
基金国家自然科学基金，中国科学院知识创新工程项目，科技部资助项目，the Ministry of Education, Culture, Sports, Science，Grants-in-Aids for Scientific Research on Functional Analysis of Genes Relevant to Agriculturally Important Traits in Rice Genome，中国科学院'百人计划'，国家自然科学基金
文摘: The plant phytohormone cytokinin plays an important role in many facets of plant growth and development by regulating cell division and differentiation. Recent studies have shed significant light into the mechanisms of cytokinin metabolism and signaling. However, little is known about how the hormone is transported in planta, although it has been proposed that the hormone is presumably transported in nucleoside-conjugated forms. Here, we report the identification and characterization of cytokinin transporters in Arabidopsis. We previously reported that a gain-of-function mutation in the PGA22/AtIPT8 gene caused overproduction of cytokinins in planta. In an effort to screen for suppressor of pga 22/atipt 8 (soi) mutants, we identified a mutant soi33-1. Molecular and genetic analyses indicated that SOI33 encodes a putative equilibrative nucleoside transporter (ENT), previously designated as AtENT8. Members of this small gene family are presumed to be involved in the transport of nucleosides in eukaryotic cells. Under conditions of nitrogen starvation, loss-of-function mutations in SOI33/AtENT8 or in a related gene AtENT3 cause a reduced sensitivity to the nucleoside-type cytokinins isopentenyladenine riboside (iPR) and transzeatin riboside (tZR), but display a normal response to the free base-type cytokinins isopentenyladenine (iP) and trans-zeatin (tZ). Conversely, overexpression of SOI33/AtENT8 renders transgenic plants hypersensitive to iPR but not to iP. An in planta measurement experiment indicated that uptake efficiency of 3H-labeled iPR was reduced more than 40% in soi33 and atent3 mutants. However, a mutation in AtENT1 had no substantial effect on the cytokinin response and iPR uptake efficiency. Our results suggest that SOI33/ AtENT8 and AtENT3 are involved in the transport of nucleoside-type cytokinins in Arabidopsis.
