Boolean algebra successfully describes the logical behavior of a digital circuit, and has been widely used in electronic circuit design and test With the development of high speed VLSIs it is a drawback for Boolean al...Boolean algebra successfully describes the logical behavior of a digital circuit, and has been widely used in electronic circuit design and test With the development of high speed VLSIs it is a drawback for Boolean algebra to be unable to describe circuit timing behavior. Therefore a Boolean process is defined as a family of Boolean van ables relevant to the time parameter t. A real-valued sample of a Boolean process is a waveform. Waveform functions can be manipulated formally by using mathematical tools. The distance, difference and limit of a waveform polynomial are defined, and a sufficient and necessary condition of the limit existence is presented. Based on this, the concept of sensitization is redefined precisely to demonstrate the potential and wide application possibility The new definition is very different from the traditional one, and has an impact on determining the sensitizable paths with maximum or minimum length, and false paths, and then designing and testing high performance circuits展开更多
Ray-casting technique used to generate realism graphs is creatively applied to simulate the NC machining process of an integral turbo-wheel, thus the representation of a workpiece is redused from 3D to 1D. As a result...Ray-casting technique used to generate realism graphs is creatively applied to simulate the NC machining process of an integral turbo-wheel, thus the representation of a workpiece is redused from 3D to 1D. As a result, simulation speed is raised greatly and the visualization is kept. The relative problems are the discussed in detail and the 5 - axis NC machining process simulation of integral turbo-wheel is illustrated with Ray-casting representation.展开更多
基金Project supported by the National Natural Science Foundation of China.
文摘Boolean algebra successfully describes the logical behavior of a digital circuit, and has been widely used in electronic circuit design and test With the development of high speed VLSIs it is a drawback for Boolean algebra to be unable to describe circuit timing behavior. Therefore a Boolean process is defined as a family of Boolean van ables relevant to the time parameter t. A real-valued sample of a Boolean process is a waveform. Waveform functions can be manipulated formally by using mathematical tools. The distance, difference and limit of a waveform polynomial are defined, and a sufficient and necessary condition of the limit existence is presented. Based on this, the concept of sensitization is redefined precisely to demonstrate the potential and wide application possibility The new definition is very different from the traditional one, and has an impact on determining the sensitizable paths with maximum or minimum length, and false paths, and then designing and testing high performance circuits
文摘Ray-casting technique used to generate realism graphs is creatively applied to simulate the NC machining process of an integral turbo-wheel, thus the representation of a workpiece is redused from 3D to 1D. As a result, simulation speed is raised greatly and the visualization is kept. The relative problems are the discussed in detail and the 5 - axis NC machining process simulation of integral turbo-wheel is illustrated with Ray-casting representation.
