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In recent years, the demand for memory performance has grown rapidly due to the increasing number of cores on a single CPU, along with the integration of graphics processing units and other accelerators. Caching has been a very effective way to relieve bandwidth demand and to reduce average memory latency. As shown by the cache feature table in Fig. 23.9.1, there is a big latency gap between SRAM...
We present a short-range experimental orbital-angular-momentum (OAM) multiplexing millimeter-wave communication system using patch antenna arrays. The dependence of the evolution of OAM beams on the number of array elements and array radius are analyzed. We also find phase delay deviation of 30 degrees leads to mode purity degrading to ∼1% and power deviation of 6 dB reduces the purity by <40%...
We investigate a pointing and tracking approach for an OAM multiplexing free-space communication link based on the measurement of the intensity gradient of the received beam. The OAM intensity gradient-based approach may potentially improve the system's tracking accuracy.
Three-dimensional spatial overlap analysis (3DSOA) has become a bottleneck in the development of three-dimensional Geographic Information System (3DGIS). Three-dimensional spatial overlay analysis method for vector polyhedrons is the key problem of three-dimensional spatial overlap analysis which still lacks complete solutions. This paper proposes a method for three dimensional spatial vector polyhedrons...
Focal plane imaging is the most commonly used modality in passive millimeter imaging (PMI) system design. This paper described a multi-channel focal plane array which composed of dielectric focal lens and dielectric tapered slot rod array so that the field of view can be scanned simultaneously. Some simplification and approximation are undertaken in order to easy design and machining, meanwhile, the...
Unstructured text represents a large fraction of the world's data. It often contains snippets of structured information (e.g., people's names and zip codes). Information Extraction (IE) techniques identify such structured information in text. In recent years, database research has pursued IE on two fronts: declarative languages and systems for managing IE tasks, and probabilistic databases for querying...
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