摘要:
In systems wherein signal compression is performed using matched filters or transforms, as in the case of radar, multiple extrapolations are used to resolve beyond the limits of diffraction. In one example (Figure 4), development of the method begins with a complex, uniformly weighted SAR or inverse SAR signal represented by a rectangle function. After performing an FFT (34), adaptive sidelobe reduction is carried out followed by an inverse weighting and truncation, after which the original signal is used to replace the center portion of the extrapolated signal (Figure 7). The signal is again transformed and sidelobe reduced, and inverse weighting and truncation are again performed, followed by the original data replacement step. The extrapolation procedure may be repeated end times, extrapolating each time by a factor K for a total extrapolation factor of K = k .
摘要:
A holographic sight (20) which includes a base (24) having at least one connector (25) for mounting the base (24) on a small arm (22), and a hologram (30) of a reticle pattern, a compact laser light source (32) for illuminating the hologram (30), and a power source (38) for the laser diode (32), each mounted on the base (24). The sight (20) also includes an achromatizer (36) supported in the path of the light beam for reducing shifts in the position of the reticle pattern due to variations in the wavelength of the light beam emitted from the laser diode (32). The sight (20) may further include means for circularizing the elliptical beam emitted from the laser diode (32) to provide a uniform illumination pattern for the hologram (30). A brightness adjuster (44) and position adjuster (40), for varying the brightness and relative position of the reticle, respectively, may also be provided.
摘要:
An apparatus for determining assignments to attributes (e.g., electrical power or overall dimensional size) of components (40) within a system. A computerized constraint network (98) is constructed which uses constraint agents (124), variable agents (128), and task agents (132) in order to make assignments to the attributes of the components based upon market-based constraint optimization techniques. The attributes have variables (28) indicative of the assignments to the attributes. Constraint data structures (150) assist the agents in determining permissible assignments for the variables (28). The constraint data structures (150) use preferential rules (152) for determining the assignments to the variables (28). The preferential rules (152) indicate which assignments for the variables (28) of the agents produce higher utility and lower cost.