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 Wysłany: Pon 13:11, 04 Kwi 2011 Temat postu: jimmy choo south africa smo djc prwk brb |
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School of the methods and principles of mathematical modeling
The total waiting time at least cost. 1.3 Description observations. Explore the empirical test data using the above information to predict the population of the region in 2000 Example 3 The following table is a place from 1900 to 1970 time 19O01910192019301940195019601970 population Population (million) 5O. 15662.94875.99591.972105.771122.775131.66915O. 697 Solutions: Cartesian coordinates in the plane, according to information and data delineate discrete points, by observation and comparison, these discrete points distributed approximately an exponential curve y = a · b. The result of two years from 2000, 1960,1970 recently, so I can set up an exponential curve f (t) = a · b, write Y = l (t) X = t a 1960, with Y = Xlgb + lga regression line method can be used determine the parameters a, b;, if not very high accuracy requirements on the case, simply point (1960,131.669), (1970,[link widoczny dla zalogowanych],150.697) to be determined a, b easy to get a = 131. 669, b = 1.0136, so the exponential curve equation f (t) = 131.69. (1.0136) Qing, population projections to 2000, the number of f (2000): 226.02 × 10. In fact the population of the region in 2000 amounted to 227 × 106, the error is 0.43%. 1_4 explore conjecture. Logically divided according to a standard, compliance with mutually exclusive, seamless principles from specific to general simulation of the study,[link widoczny dla zalogowanych], and to predict the results of its development, and then divided into different types of objects to solve. Example 4 in a line, and turn in A,[link widoczny dla zalogowanych], A:, ..., A has n robots at work now like to set up a parts supply points should ask where can the robot and its 11 the sum of the minimum distance? analysis: on the line l I1 a robot location are A (x1), A2 (x2), ..., A (x), (xl 0 and position x on the other there are d> d so the parts supply points to be put ② When the best place in the A 11 = 6, if the parts supply points located in the A,, A anywhere in any position between the x (X), the six robots and X distance and d = X6 + X5 + a Xl-X2 X4 X3 if part of a supply point located in the A:, A anywhere between X (x),[link widoczny dla zalogowanych], then 6 from the sum of the robot and x d = X6 + x5 + x4 x3 a Xl-X2 a +2 lX-X3l '. 'D a d = 2lX-X3I> 0. '. d> d it is spare parts supply points located in the A,, A are among the best at any point. (2) conjecture, logical division ① When n is odd, spare parts supply points located at a point to meet the requirements. ② When n is even, parts supply points early in A and A + guide at any point in the middle of all meet the requirements. 2 mathematical modeling several principles to be followed the principle of mathematical modeling moderate 2.1 design issues necessary to maintain the actual background, but enables students to understand the social information does not create difficulties. Many factors may be involved in the actual context, providing the conditions may be inadequate or excessive, the term professional, computing excessive, therefore, mathematical modeling of the actual background to the problem re-processing,[link widoczny dla zalogowanych], to moderate. 2.2 The principle of gradual and orderly progress of mathematical modeling design students to consider the actual level of knowledge spiral. 2.3 because he was teaching the principles of mathematical modeling to consider the student's knowledge and personality differences, different levels of the different requirements of students, a reasonable evaluation, top technology students asked to write essay. 2.4 The principle of mathematical modeling, adaptive design should be matched with the content of classroom teaching, reflecting the idea of mathematical modeling methods, extracurricular activities, modeling math involved in the design can be expanded, but the model classroom Problems with the progress of teaching objectives and classroom teaching to adapt, not arbitrarily widening and deepening, increasing the burden of student learning.
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