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 Posted: Sat 16:39, 11 Dec 2010 Post subject: ugg stivali Taper with a simplified calculation me |
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Taper with a simplified method of calculation of conversion
More frequent. One can be seen, the original calculation process is very complicated, the measured m value're just three times a trigonometric table, two taper m values measured on the need to check the four dozen trigonometric tables, it is inevitable errors. Improved formula is as follows: ctg (~ / 2) a tga + v / 1 + tg. a conversion, there is only a tangent of the angle and the value of a trigonometric function look-up table issues. Is on the ctg (fl / 2) = tga +. / 1 + g mouth to permit. (The switch to 35) l / chip; Technology / regret concentration, measurement technique 1997. № 1 In addition, it can not eliminate the uncertainty of the same,[link widoczny dla zalogowanych], it caused the false positive problem will remain. According to this view reasoning, a lot of volume transmission process may happen. The consequences are certified by the measurement apparatus may be cumulative tolerance and gradual expansion. This shows that the number of verification procedures in relation to the error of the edge of the treatment is rigorous enough. In fact, there is uncertainty tolerance zone boundary is a common measurement problems. We know the purpose of measurement can be divided into two types according to the type of a category is for the purpose of direct access to data, such as the measurement of atmospheric temperature,[link widoczny dla zalogowanych], distance between the two places; second requirement is to determine the limits of the data fall within or outside the boundaries, such as component content of not less than a specified value, a material strength is not smaller than some value (a limit). Another example of a part size value is the tolerance zone falls within the acceptable range, if the value of measuring instruments show falls within the tolerance, etc. (two boundaries). The second category listed above and universal measurement of a large number of product quality testing and measuring test, it is also probably fall into this category. Therefore, try to reduce the uncertainty area, determine compliance with reasonable limits of test results to improve the accuracy of measurement is important and universal significance. Second, methods and ideas to improve the measurement equipment was seized by the acceptance limits of the standard device error, it can only improve the detection accuracy and the corresponding limits of error of compression to reduce the uncertainty areas, so the opportunity to reduce false positives and control at a reasonable level acceptable within. '1. Compression tolerance measuring instruments were seized. The limits of error boundary inward (Taiwan Version direction) a distance A. (Standard error of the absolute value of the limit device), the acceptance by the new boundaries to ensure that qualified to judge the correctness of products. In the machinery industry already has a \And acceptance of products in order to (see Figure 3). Based on this method, such as to improve the measurement accuracy can reduce the margin of error limit the amount of movement, so that part of the obstacle to the adoption of qualified products, it seems more reasonable. 2, to reduce the impact of uncertainty area should try to improve the measurement accuracy. This could be from the following aspects: (1) an important occasion, may consider appropriate to raise standards, or test equipment accuracy. (2) using a modified correction value on the measurement,[link widoczny dla zalogowanych], can eliminate most of the systematic error, the relative improve the accuracy of the measurement equipment. (3) repeated measures when needed several times, the mean value to reduce the random error. (4) to improve environmental conditions, improve operational level to reduce environmental, personnel and other errors. Above (2), (3) two points can be used when needed,[link widoczny dla zalogowanych], especially near the boundary test data, it difficult to judge especially when necessary. Third, two suggestions 1. In the measurement test,[link widoczny dla zalogowanych], when higher standards to pass the lower standard of measuring devices, we should give a revised uniform provisions (currently testing some projects did not give a revised certificate), when measuring transfer work, if amendments are required can also be issued value. It can be said that only certified by the amount and has the correct value of the amount of mass transfer is complete. 2. Verification procedures is the authority of the technical documentation, on the ultimate limits of error allowed and qualified acceptance of limits to determine a clear approach to ensure the accuracy of content and rigor of transmission. (Continued from page 33) out. In AABC, the set BC = Ⅱ, AB for a 6, BAC, OAlCl-/ 2. Port + port = 90. MC a R +. . cosu = sinfl = 6 / mouth. _-62, sina = cos $ = a / n +6 according to half-angle formula ctg (fl / 2): (1 + cos ~) / sinfl = (1 + a / | (b /, brother, a aIb, brother of which / 6 a tga, + / 6-1/sinfl = 1/cos, and 1/cosa =, / 1i a Ge dry. 7 thousand i.ctg (fl / 2) = tga + / 1 + g port set up, which : d ten thirty】 2tg a port + d (1 + tg. + ~ / 1 + tg) 2 A dl +2 hl · tga + d. (1 + tg + ~ / 1 + tg port) 【next turn page 41)
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