Abstract: A computer system and associated processes are disclosed for grouping similar real estate properties into contiguous neighborhoods, and for generating neighborhood-specific models capable of estimating property values within their respective neighborhoods. A clustering component uses various sources of property-level data to group properties based on measures of property similarity. For example, the clustering component may use features extracted from property images to identify properties with similar characteristics. As another example, the clustering component may measure property similarity based on how frequently specific properties are designated as comparable in appraisal reports. A model generator uses a machine learning process to determine, for specific neighborhoods, correlations between property attributes and values, and uses these correlations to generate the neighborhood specific models.

Abstract: A mounting block of a lighting fixture includes a plurality of tilting screw holes inclinedly formed in the block for detachably mounting a plurality of supporting leg members in a bottom portion of the block, and a central hole vertically formed through the block for detachably securing a central post of a lamp socket or a shade in the central hole, whereby upon positioning of the mounting block on a lower position of a lighting fixture, the mounting block will serve as a supporting base of the lighting fixture; and upon positioning of the mounting block on a middle portion of a lighting fixture, the mounting block will serve as a lamp holder for directly securing a lamp socket and a shade on the block; and upon positioning of the mounting block on an apex of a lighting fixture, a fantastic pyramid structure of lighting fixture will be formed by suspending the shade and lamp socket on the supporting leg members protruding inclinedly downwardly from the mounting block.

Abstract: A combination of lighting fixture and rack includes: a lamp installed on a top portion of a rack having a plurality of ribs juxtapositionally disposed on a right and a left side portion of a central column of the rack for inserting a plurality of compact disks (CDs) or cassette tapes on the ribs of the rack, and a lamp shade mounted on the lamp, whereby upon powering of the lamp to create a thermosyphon for drafting air streams around the lamp for ventilating the disks or tapes held on the rack for preventing mildew of the disks and tapes for hygienic purpose besides an illumination purpose of the lamp.