American Journal of Scientific Research and Essays


Maintenance of Bullet Train Based on Mathematical Planning and Workshop Scheduling

Research article of American Journal of Scientific Research and Essays Maintenance of Bullet Train Based on Mathematical Planning and Workshop Scheduling Hairui Zhang1*, Zhong Zheng2, Yu Cao1 1College of Science, China Three Gorges University, Yichang, 443002, China. 2College of Electrical Engineering & New Energy, China Three Gorges University, Yichang, 443002, China. Nowadays, bullet train service stations often suffer from the phenomenon of low operating efficiency due to the unreasonable arrangement of bullet trains that stay in service stations for too long. In order to solve this problem, based on the information of bullet train arrival in two periods of a bullet train service station, this paper comprehensively considered the input source, queuing rules and overhaul intensity of the train service system, determined the objective function and multiple constraint conditions, and established the 0-1 programming model and Uncorrelated Parallel Machine Optimization Model. The model established in this paper can relieve the load pressure of bullet train service station to a great extent, improve the operation efficiency of the service station under the condition of ensuring the maintenance quality of bullet train, and provide theoretical basis for realizing the shortest maintenance time of bullet train service station. Keywords: 0-1 programming; Queuing theory; Nncorrelated parallel machine; Fruit fly optimization algorithm; Workshop scheduling ...

ABUSIVE USE OF DRUGS CONTROLLED BY THE USERS OF FAMILY HEALTH STRATEGY THE USERS OF THE IPAUMIRIM FAMILY HEALTH STRATEGY – CEARÁ

Research article of American Journal of Scientific Research and Essays ABUSIVE USE OF DRUGS CONTROLLED BY THE USERS OF FAMILY HEALTH STRATEGY THE USERS OF THE IPAUMIRIM FAMILY HEALTH STRATEGY - CEARÁ Carla Suzana Balbino da Silva Miranda¹*, Antonio Aury de Macêdo Torquato², Adaires Fontes Balbino³ ¹Mestranda na Universidade Estadual do Ceará (UECE) ²Estratégia Saúde da Família – Prefeitura Municipal de Ipaumirim – Ceará; ³Centro de Apoio Psicossocial – Prefeitura Municipal de Lavras – Ceará. Introduction Benzodiazepines (BZD) are drugs that act directly on the central nervous system, altering cognitive and psychomotor aspects. In Brazil, it is the third class of most prescribed drugs, being used by approximately 4% of the population. The restricted, rational and short-term use of benzodiazepines is not observed on a large scale by professionals who attend the Ipaumirim Family Health Strategy, due to the high number of people who just want the revenue renewal. General Objective: To develop an action plan to promote the reduction of drug abuse controlled by users of the Ipaumirim Family Health Strategy - CE. Methodology: This is an intervention project that consists of an action proposal to face a real problem. The interventions were performed at the Basic Health Unit of Ipaumirim - CE, from June 18 to August 16, 2018 with evaluation every three months, with 36 users. Identification was performed through medical records, interviews in routine consultations. Results: the lack of information from users was clear, resulting in changes in actions involving primary care to alternative treatments such as physical activity, food reeducation and psychotherapy, stimulating actions such as the booklet, an organizational basis, since it does not have the horus system. Conclusion: the study effectively allowed the development of a new health promotion strategy. Keywords: Use, Benzodiazepines, Abuse, Reduction ...

Experimental Study on the Performance of on-site Mixed Emulsion Explosives and Rock Impedance Matching

Research article of American Journal of Scientific Research and Essays Experimental Study on the Performance of on-site Mixed Emulsion Explosives and Rock Impedance Matching Huang Shengsong1, Zhao Mingsheng1,2*, Zhang Yiping1, Zhao Kejie1 1Mining School, Guizhou University, Guiyang 550025, China. 2Guizhou Xinlian Blasting Engineering Limited Corp, Guiyang 550002, China The proportion of on-site mixed emulsion explosives in mining is getting higher and higher, in order to better use the explosive performance of mixed explosives to improve energy utilization. Based on the wave impedance theory, the wave impedance of mixed explosives is changed to make rocks The wave impedances are matched to achieve the purpose of improving the blasting effect and reducing the bulk rate. After field test, increasing the sensitizer content within a certain range is beneficial to the improvement of explosive performance. When the explosive sensitizer content is 1.15%, the best matching coefficient of mixed explosive and rock impedance is 2.51, the rock after blasting is large. The block rate is reduced and the rock crushing effect is better. After this matching test, it is shown that it is feasible to improve the blasting performance by adjusting the explosive performance of the explosive by the optimal wave impedance coefficient according to the hardness of the rock, which can provide reference for the peers. Keywords: Impedance matching coefficient; Explosive performance; Blasting effect ...

Numerical simulation of propeller jet field based on Star-ccm+

Research article of American Journal of Scientific Research and Essays Numerical simulation of propeller jet field based on Star-ccm+ Peng-rong Li College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China. During the ship’s voyage, the propeller jet affects the movement of silt at the bottom of the bed. To research the influence of the bottom boundary on the propeller jet field, this paper takes the standard propeller DTRC4119 propeller as the research object and uses the CFD software Star-ccm+ to carry out a numerical simulation of the propeller jet under uniform flow. The flow velocity distribution of the jet under four operating conditions is mainly analyzed, including the axial velocity, tangential velocity and radial velocity of the jet. The results show that the distance between the propeller and the boundary does not affect the magnitude and distribution of the velocity on the initial plane but affects the shape of the axial velocity and the velocity on the central axis in the development zone; The closer to the bottom boundary, the greater the disturbance of tangential velocity and radial velocity, the peak value of tangential velocity will be affected and changed from central symmetry of velocity to unanimous trend earlier. The radial velocity contributes less to the overall velocity and can be ignored. Keywords: Propeller; Jet field; CFD ...

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American Journal of Scientific Research and Essays1

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