摘要:
A condition management callback system and method for use with a processor employing a hierarchical register consolidation structure. In one embodiment, the system includes: (1) a condition management structure, (2) a callback abstraction subsystem configured to register a callback for at least one element object in the condition management structure and store logically abstracted data associated with the callback and (3) an abstraction retrieval subsystem configured to employ the condition management structure to determine a condition of at least one status indicator in the condition management structure by traversing the hierarchical register consolidation structure, initiate the callback based on the condition and pass the logically abstracted data if the element object representing the status indicator has the callback registered.
摘要:
A method and apparatus for controlling a brushless DC (BLDC) motor over a wide range of angular speeds is presented. Analog magnetic sensors provide continuous signal measurements related to the rotor angular position at a sample rate independent of rotor angular speed. In one embodiment, analog signal measurements are subsequently processed using an arctangent function to obtain the rotor angular position. The arctangent may be computed using arithmetic computation, a small angle approximation, a polynomial evaluation approach, a table lookup approach, or a combination of various methods. In one embodiment, the BLDC rotor is used to drive a Roots blower used as a compressor in a portable mechanical ventilator system.
摘要:
A method, system, apparatus and device for the monitoring, diagnosis and evaluation of the state of a dynamic system is disclosed. This method and system provides the processing means for receiving sensed and/or simulated data, converting such data into a displayable object format and displaying such objects in a manner such that the interrelationships between the respective variables can be correlated and identified by a user. This invention provides for the rapid cognitive grasp of the overall state of a critical function with respect to a dynamic system. The system provides for displayed objects, which change in real-time to show the changes of the functions of the system. It is a highly flexible system which works with a wide variety of applications, including biological systems, environmental systems, engineering systems, economic systems, mechanical systems, chemical systems and the like. The device of this invention is adapted specifically to providing objects within a frame associated with other objects in a reference grid to provide a graphical representation of cardiovascular function.
摘要:
In one embodiment the invention comprises a method for generating a log of a subsurface formation, in which data from well logging measurements are utilized to derive a relationship between porosity and irreducible water saturation for the formation and the derived relationship between porosity and irreducible water saturation is applied to a porosity log of the subsurface formation to generate a log of irreducible water saturation. In another embodiment the invention comprises a method for calculating a theoretical water saturation log for a subsurface formation which utilizes a relationship based on porosity, irreducible water saturation and height above the petroleum-water contact level.
摘要:
Variations in the speed of an internal combustion engine are measured and the distribution of the variations is analyzed for asymmetry, which indicates engine misfire. A threshold is generated as a function of engine speed increases and compared with engine speed decreases to detect asymmetry in the distribution.