The dynamic Systems behaviours are investigating using the fourier tansform of data, the puankaveh surfaces, Iyapunov exponents Calculations and attractor diemsion Study in phazzy space.At the among of mentioned methods, the Iyapunov exponents Calculations are suitable method Contrary to the Iyapunov exponents Calculations for the existing equation of the behavioures of the systems, the using of the mentioned method for the laboratory investigations is very difficult. In this work, the Iynpunov exponent Calculation estimated using Eckmonn method.

Introduction: For evidence based decision-making and designing more accurate health system planes for effective prevention on drug dependency, incidence rate and time trend of number of new cases are necessary. This survey was conducted based on data of Kerman drug detoxification agencies in order to determine the time trend of incidence rate of opioid dependency and the effects of various factors on lag time (the time between onset of substance use and first treatment request). Method: In this retrospective cohort study, 4309 opioid users visiting Kerman Welfare Organization between 1997 and 2004 were analyzed. Subgroups were shaped according to the first year of consumption. Estimated incidence of addiction was determined by using backward Calculation method. The Effect of various factors on lag time was calculated by multivariable regression method. Results: Relative incidence of addiction between 1997 and 1999 was increased by 70% annually, followed by a slightly decrease to 540 persons in 2000. The minimum estimated number was seen in 2003 (400 cases) and it peaked to the maximum in the next year (1145 cases). The average of lag time was 7.98±6.47 years with median 6 years. The lag time of opium users was 7.81±6.48 and for opium syrup – a liquid prepared from the ashes of smoked opium – users was 8.32±6.17 years (p=0.001). Individuals who have consumed both opium and opium syrup simultaneously, had a more lag (p=0.0001). Men with lag time of 8.1±6.41 years, had a significant longer lag time than women (7.05± 6.78 years).In compare with cases with 20-30 ages (7.86±6.38 years) and cases older than 30 years (7.7±6.44 years), the lag time for persons less than 20 years old (8.62± 6.68 years) was significantly more (p=0.0001). The lag time for illiterates (10.73±7.59 years) was more than cases with academic education (7.87±7.27 years). The lag time for married persons (8.87±6.8 years) was significantly more than singles (4.9±3.76 years). Conclusion: Time trend of addiction can be divided into two parts in recent years. First part is from 1997 to 1999; in this period the number of new cases of addiction increased but from 2000 to 2002 it is fairly constant. Some factors such as being women, younger, more literate, single and simply opium users have a negative correlation with lag time.

Matrix and its determinant are two basic tools, which are important in financial, accounting, and economic affairs. Therefore, in this paper, a simple and effective method is proposed to obtain the determinant of fuzzy matrices. First, using arithmetic operations based on Transmission Average (TA), the second order fuzzy determinant is calculated. Then, Sarrus rule is defined to calculate third order fuzzy determinant. Finally, by defining minor of fuzzy matrix and ijth adjugate of the fuzzy matrix, nth order fuzzy determinant is calculated. The effectiveness and applicability of the proposed method are verified by solving some numerical examples.

The Calculation of structure function of h particle is carried out at three energies, namely 0.975, 1.005 and 1.065 GeV in the range of Q2=0.1 to 0.3 (GeV/c)2 by using the Rosenbluth separation technique in h electro production.The functional dependency of form factor and structure function to the Q2 is investigated via separated cross sections L s and s T.

In this paper, finite element method is used for simulation of a railgun and Calculation of rails and armature forces. A magnetic field produced by applying a semi- pulse current to a railgun causes Lorenz forces in rails and armature. This latest force accelerates the armature and projectile. In this study, after determining this force, acceleration, velocity and positions of armature versus time are calculated. The maximum value of rails' force versus time in every rail points were calculated too. This value is very important in railgun and their material design and fabrication.

Electromagnetic launchers have very important advantages over powder guns, and then increasing the efficiency of these launchers is one of the important goal of researchers around the world. One of the most important factor to increase efficiency is enlargement "inductance gradient" or L'. This paper presents two methods for Calculation L' in cylindrical rails construction. The results of two methods is compared and showed they are almost identical. The second method used for square rails construction and the results is compare with reported result by famous scientist. Finally inductance gradient L' for railgun with auxiliary rails calculate by second method. The methods proposed in this paper have advantages over to numerical method because compact formulas obtained for L' . By these formulas we can study the effects of different dimensions on L' values. A table of L' for different dimensions of railgun is presented in this paper.