With the reduction of urban land, the three-dimensional garage is increasingly built with its advantages of saving land. But the current three-dimensional garage is built for the car. It is hardly stereo parking garag...With the reduction of urban land, the three-dimensional garage is increasingly built with its advantages of saving land. But the current three-dimensional garage is built for the car. It is hardly stereo parking garage for electric bicycles. This paper designed a hollow tower electric bicycle stereo parking garage with fork comb structure, based on the analysis of the characteristics of electric bicycles and the characteristics of existing three-dimensional garages. A fixed comb is mounted on the garage frame. The movable comb is mounted on the middle lift mechanism of the garage. The access of the vehicle is achieved by the exchange of the comb. The key comb structure was modeled using SolidWorks software and the stress distribution of the structure was analyzed. It was optimized by MATLAB software. The result shows that this structure can improve access efficiency. The quality of the comb structure can be minimized under the constraints of strength requirements.展开更多
Background: Occupational dermatoses, also called occupational dermatitis or occupational dermatitis, are very common in the workplace and are still a topical subject. All over the world, especially in developed countr...Background: Occupational dermatoses, also called occupational dermatitis or occupational dermatitis, are very common in the workplace and are still a topical subject. All over the world, especially in developed countries. They handicap the professional activities of the workers. Purpose: To determine the epidemiological profile of dermatosis among automobile repair and maintenance garages in Parakou. Methods: It was a cross-sectional and descriptive study carried out from 20 April to 17 May 2020. The sampling method was non-probabilistic. Data collected from a questionnaire, clinical examination and worksite observation were analyzed with Epi Info 7.2.2.1 software. Results: The participation rate was 98.08%. The sex ratio (male/female) was 178. The mean age of the respondents was 25.80 ± 10.22 years. Respondents with less than 5 years of experience in the field were 61.22%. Mechanics were the most numerous. In the sample, 95.81% had frequent skin contact with fuels, 84.08% had contact with motor oils and 15.92% had contact with dilute battery electrolyte solutions. The frequency of dermatosis was 73.46%. Hands and wrists were the most affected seats (47.35%). Some (33.84%) wore them before the start of the activity in the garage but in 66.22% of them, the dermatosis had occurred because of their arrival in the garage. Among these skin diseases, keratoderma predominated at 80.01%. Conclusion: Dermatosis is very common among garage owners in Parakou.展开更多
With the increase of car share in the city,the scale of underground garage construction is expanding,and the importance of underground garage space in people’s daily life is also increasing.However,the closed and dar...With the increase of car share in the city,the scale of underground garage construction is expanding,and the importance of underground garage space in people’s daily life is also increasing.However,the closed and dark space of the traditional underground garage obviously can not meet the modern life in the city,and landscape environment optimization of underground garage gradually enters people’s vision.In this study,the natural elements that can be introduced into the underground garage for landscape design were classifi ed and sorted,and the design methods were discussed with examples.Finally,the development of landscape environment design of underground garage was prospected.展开更多
With the development of new urbanization,high-rise buildings stand tall,and all kinds of roads are busy,and the garage has become an indispensable necessity for people.The rise of the garage has also made the market d...With the development of new urbanization,high-rise buildings stand tall,and all kinds of roads are busy,and the garage has become an indispensable necessity for people.The rise of the garage has also made the market demand for it.The ordinary flat garage is no longer enough to meet the demand for parking.Therefore,the modem mechanical three-dimensional garage has become the darling of the society,many large shopping malls,commercial buildings,A variety of mechanical three-dimensional garages have been commonly used in hotels and guesthouses.However,due to the late start of the mechanical three-dimensional garage,there are still many problems,such as slow operation of mechanical equipment,noisy mechanical noise,slow parking and other significant problems.Therefore,the contemporary mechanical three-dimensional garage is in urgent need of improvement.In this paper,the improvement analysis of the single-arm rotary vertical lifting type is carried out,and the mechanical principle knowledge is used to analyze the existing problems,so as to propose an improved solution.展开更多
基金supported by Supported by National Natural Science Fund(U1704156)
文摘With the reduction of urban land, the three-dimensional garage is increasingly built with its advantages of saving land. But the current three-dimensional garage is built for the car. It is hardly stereo parking garage for electric bicycles. This paper designed a hollow tower electric bicycle stereo parking garage with fork comb structure, based on the analysis of the characteristics of electric bicycles and the characteristics of existing three-dimensional garages. A fixed comb is mounted on the garage frame. The movable comb is mounted on the middle lift mechanism of the garage. The access of the vehicle is achieved by the exchange of the comb. The key comb structure was modeled using SolidWorks software and the stress distribution of the structure was analyzed. It was optimized by MATLAB software. The result shows that this structure can improve access efficiency. The quality of the comb structure can be minimized under the constraints of strength requirements.
文摘Background: Occupational dermatoses, also called occupational dermatitis or occupational dermatitis, are very common in the workplace and are still a topical subject. All over the world, especially in developed countries. They handicap the professional activities of the workers. Purpose: To determine the epidemiological profile of dermatosis among automobile repair and maintenance garages in Parakou. Methods: It was a cross-sectional and descriptive study carried out from 20 April to 17 May 2020. The sampling method was non-probabilistic. Data collected from a questionnaire, clinical examination and worksite observation were analyzed with Epi Info 7.2.2.1 software. Results: The participation rate was 98.08%. The sex ratio (male/female) was 178. The mean age of the respondents was 25.80 ± 10.22 years. Respondents with less than 5 years of experience in the field were 61.22%. Mechanics were the most numerous. In the sample, 95.81% had frequent skin contact with fuels, 84.08% had contact with motor oils and 15.92% had contact with dilute battery electrolyte solutions. The frequency of dermatosis was 73.46%. Hands and wrists were the most affected seats (47.35%). Some (33.84%) wore them before the start of the activity in the garage but in 66.22% of them, the dermatosis had occurred because of their arrival in the garage. Among these skin diseases, keratoderma predominated at 80.01%. Conclusion: Dermatosis is very common among garage owners in Parakou.
基金General Program of National Natural Science Foundation of China(51778611).
文摘With the increase of car share in the city,the scale of underground garage construction is expanding,and the importance of underground garage space in people’s daily life is also increasing.However,the closed and dark space of the traditional underground garage obviously can not meet the modern life in the city,and landscape environment optimization of underground garage gradually enters people’s vision.In this study,the natural elements that can be introduced into the underground garage for landscape design were classifi ed and sorted,and the design methods were discussed with examples.Finally,the development of landscape environment design of underground garage was prospected.
文摘With the development of new urbanization,high-rise buildings stand tall,and all kinds of roads are busy,and the garage has become an indispensable necessity for people.The rise of the garage has also made the market demand for it.The ordinary flat garage is no longer enough to meet the demand for parking.Therefore,the modem mechanical three-dimensional garage has become the darling of the society,many large shopping malls,commercial buildings,A variety of mechanical three-dimensional garages have been commonly used in hotels and guesthouses.However,due to the late start of the mechanical three-dimensional garage,there are still many problems,such as slow operation of mechanical equipment,noisy mechanical noise,slow parking and other significant problems.Therefore,the contemporary mechanical three-dimensional garage is in urgent need of improvement.In this paper,the improvement analysis of the single-arm rotary vertical lifting type is carried out,and the mechanical principle knowledge is used to analyze the existing problems,so as to propose an improved solution.
