Download Learning PHP Data Objects: A Beginner's Guide to PHP Data by Dennis Popel PDF
By Dennis Popel
This e-book starts off with an outline of personal home page facts gadgets (PDO), by means of getting all started with PDO. Then it covers blunders dealing with, ready statements, and dealing with rowsets, prior to overlaying complex makes use of of PDO and an instance of its use in an MVC software. eventually an appendix covers the recent object-oriented beneficial properties of Hypertext Preprocessor five. This ebook will advisor you thru the knowledge layer abstraction gadgets in Hypertext Preprocessor. personal home page builders who have to use PDO for info abstraction.
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Extra resources for Learning PHP Data Objects: A Beginner's Guide to PHP Data Objects, Database Connection Abstraction Library for PHP 5
Example text
A subscripted index behind a comma stands for partial derivative with respect to the corresponding contravariant coordinate. Finally, g'f and gii are respectively the contravariant and covariant coordinates of the metric tensor g. Equations (20) to (25) are non-dimensional equations. f Cp ref T rer Locally monoclinic coordinate system In order to derive the compressible, laminar, boundary-layer equations, attention has to be paid to the coordinate system used. Since boundary-layer theory is based upon the property that the advection occurs mainly parallel to the surface and the diffusion in the direction normal to the wall, the coordinate system used must reflect these features in order to perform the order-of-magnitude analysis.
T1OO. eo. • 1500. 1550. • 1500. W50. • 1400. ~. • \300. mo, • 1200. 1150. o noo. 1000. • 1000. 85. In the stagnation point region, the temperature reaches values above 2000 K, and falls down in the downstream direction. The attachment line originating from the stagnation point and proceeding towards the leading edge is marked by local surface heating. The influence of the radiative emissivity coefficient has also been investigated. 7 . The predicted wall temperature with an emissivity coefficient e = 1 is shown on figure 29.
E. the curvature tends towards infinity as e: tends towards zero. 3. O(K) > 0 (~) : The flow can be considered as "curvature dominated", the extreme case being the corner flow for K -+ 00. As the wall normal direction varies rapidly, the concept of preferred direction which is the baseline of boundary-layer theory is no longer valid. Such cases can be treated with PNS approaches which are out of scope here. The matched asymptotic expansions approach, as presented in chapter I, deals with the first case but not with the second and third ones.