摘要:
A method for the definition of data categories is described. The method uses logic templates and may be used in database processing. One embodiment of the method comprises: selecting a plurality of attributes from a group of attributes, each attribute describing a possible data item in a set of data; selecting a logic template from a group of logic templates, each logic template comprising a predetermined logic expression containing one or more variables; and assigning one or more selected attributes to each variable within the selected the logic template to produce a logic expression defining the data category. A computer program product and a user interface for achieving this method are also described.
摘要:
A method for the definition of data categories is described. The method uses logic templates and may be used in database processing. One embodiment of the method comprises: selecting a plurality of attributes from a group of attributes, each attribute describing a possible data item in a set of data; selecting a logic template from a group of logic templates, each logic template comprising a predetermined logic expression containing one or more variables; and assigning one or more selected attributes to each variable within the selected the logic template to produce a logic expression defining the data category. A computer program product and a user interface for achieving this method are also described.
摘要:
The present invention features a fluid flow regulator that functions to influence fluid flow across an airfoil or hydrofoil, as well as various rotating or rotary devices, including propellers, impellers, turbines, rotors, fans, and other similar devices, as well as to affect the performance of airfoils and hydrofoils and these rotary devices subjected to a fluid. The fluid flow regulator comprises a pressure recovery drop that induces a sudden drop in pressure at an optimal pressure recovery point on the surface, such that a sub-atmospheric barrier is created that serves as a cushion between the molecules in the fluid and the molecules at the airfoil's or hydrofoil's surface. More specifically, the fluid flow regulator functions to regulate the pressure gradients that exist along the surface of an airfoil or hydrofoil. Selectively reducing the pressure drag at various locations along the surface, as well as the pressure drag induced forward and aft of the airfoil or hydrofoil, via the pressure recovery drop regulates pressure gradients. Reducing the pressure drag in turn increases pressure recovery or pressure recovery potential, which pressure recovery subsequently reduces the friction drag along the surface. Reducing friction drag decreases the potential for fluid separation, and reduces the separation and separation potential of the fluid.
摘要:
The present invention features a fluid flow regulator that functions to significantly influence fluid flow across an airfoil or hydrofoil, as well as various rotating or rotary devices, including propellers, impellers, turbines, rotors, fans, and other similar devices, as well as to significantly effect the performance of airfoils and hydrofoils and these rotary devices subjected to a fluid. The fluid flow regulator comprises a pressure recovery drop that induces a sudden drop in pressure at an optimal pressure recovery point on the surface, such that a sub-atmospheric barrier is created that serves as a cushion between the molecules in the fluid and the molecules at the airfoil's or hydrofoil's surface. More specifically, the present invention fluid flow regulator functions to significantly regulate the pressure gradients that exist along the surface of an airfoil or hydrofoil. Regulation of pressure gradients is accomplished by selectively reducing the pressure drag at various locations along the surface, as well as the pressure drag induced forward and aft of the airfoil or hydrofoil, via the pressure recovery drop. Reducing the pressure drag in turn increases pressure recovery or pressure recovery potential, which pressure recovery subsequently lowers the friction drag along the surface. By reducing or lowering friction drag, the potential for fluid separation is decreased, or in other words, the separation and separation potential of the fluid is significantly reduced.
摘要:
The present invention features a fluid flow regulator that functions to significantly influence fluid flow across the surface of a fuselage or similar structure as part of a moving or stationary body, as well as to significantly effect the performance of the body subjected to the fluid. The fluid flow regulator comprises a pressure recovery drop that induces a sudden drop in pressure at an optimal pressure recovery point on said surface, such that a sub-atmospheric barrier is created that serves as a cushion between the molecules in the fluid and the molecules at the body's surface. More specifically, the present invention fluid flow regulator functions to significantly regulate the pressure gradients that exist along the surface of a body subject to fluid flow. Regulation of pressure gradients is accomplished by selectively reducing the pressure drag at various locations along the surface, as well as the pressure drag induced forward and aft of the body, via the pressure recovery drop. Reducing the pressure drag in turn increases pressure recovery or pressure recovery potential, which pressure recovery subsequently lowers the friction drag along the surface. By reducing or lowering friction drag, the potential for fluid separation is decreased, or in other words, attachment potential of the fluid is significantly increased. All of these effects may be appropriately and collectively phrased and referred to as optimization of fluid flow, wherein the fluid flow, its properties and characteristics (e.g., separation, boundary layer), and relationship to the body are each optimized.