in this paper, solution of nonlinear optimal control problems and the controlled duffing oscillator, as a special class of optimal control problems, are considered and an efficient algorithm is proposed. this algorithm is based on state parametrization as a polynomial with unknown coefficients. by this method, the control and state variables can be approximated as a function of time. also, the ...

in this paper, an optimal adaptive fuzzy integral sliding mode control is presented to control the robot manipulator position tracking in the presence of uncertainties and permanent magnet dc motor. in the proposed control, sliding surface of the sliding mode control is defined according to the information of position tracking error, derivatives, and error integral. in order to estimate bounds ...

manure and putreseible garbage are some of the main sources of pathogenic germs in countryside’s. on the other hand, demand for fertilizer and energy increases in rural areas every day. to study potential of cow manure for these requirements a 16,5m3 pilot plant was designed and constructed as fermentation tank near animal husbandry of karaj agriculture faculty. some 260kg cow manure and water ...

background: respiratory diseases/syndromes are the most common causes of referring to physicians among pilgrims in hajj . they lead to high morbidity , impose high costs on the health system and are among the major obstacles for pilgrims to perform hajj duties. the main aim of our study was to determine types, frequencies, etiologies, and epidemiologic factors of respiratory diseases among iran...

background: evidence shows that in iran alcohol abuse rate may be of concern, especially among the youth. the mental and social health and addiction department of the ministry of health and medical education has designed a plan to prevent, treat, and rehabilitate the patients abusing alcohol in a time period of 2011‑2015. methods: in a 6‑month period, three guiding committees of experts in the ...

background: one of the necessities of industrial societies is the application of developed measures/strategies for the prevention of occupational incidents in industrial companies. the present study was conducted with the aim of determining the role of the safety management system on safety culture of an oil and gas exploration and production company. materials and methods: this study was condu...

objective: social skills training (sst) aims to increase the ability to perform key social behaviors that are important in achieving success in social situations. the purpose of this study was to examine the effectiveness of social skills intervention for aggressive pre-school children. method: the sample consisted of 25 children (13 for the experimental group, 12 for the control group). childr...

b a ckground: malaria still is considered as a public health problem in iran. the aim of the national malaria control department is to reach the elimination by 2024. by decreasing the number of malaria cases in preelimination phase the cost effectiveness of malaria interventions decreases considerably. this study estimated the cost effectiveness of various strategies to combat malaria in preeli...

background and objectives: nowadays, the use of educational models to determine the causes of rejection of health-related behaviors has been on theincrease. health belief model is one of the models during the past years has been considered. therefore, the aim of this study was to measure health belief model constructs in preventive behavior about self-medication in pregnant women in the city of...