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Cognitive radios is emerging as a promising wireless paradigm, which will integrate benefits of software defined radio with a complete aware communication behavior. By detecting environments in real time and extracting interference characteristic in frequency spectrum, it can use flexible spectrum assign strategy for adaptive communications. To reach this goal many issues remain still open, such as...
Grid computing is a kind of important information technology, which enables resource sharing in a wide area and system integration. Resource management and scheduling in a grid environment is a challenging problem worth researching. A Mobile Agent-based service scheduling model (MASSM) in the service grid is presented, which aims at maximizing the user's benefit. The Most Benefit Travelling Salesman...
Task scheduling under a grid environment is an important research area, on which there are now many researches. Either in the meta-task scheduling problems or DAG (Direct Acyclic Graph) scheduling problems, it is usually assumed that tasks or sub-tasks are submitted to dedicated and idle hosts and that these tasks are processed in the FIFO (First In First Out) order. However, this is not practical...
In recent years, thermoplastic elastomers (TPE) based multi-material molded products have found wide spread uses in various industries and every-day life. Today's computer-aided design (CAD) tools are very cumbersome in designing multi-material parts. This paper proposes a top-down design methodology to facilitate the design of multi-material products. Haptic technology is employed to enhance efficiency...
Due to the high flexibility and versatility in the process development of microfluidic devices, an epoxy-based, high-aspect ratio photoresist SU-8 is now attracting attention as the main structuring material of the fluidic channels. Manipulation of the surface properties of SU-8 channel wall is critical to attach functional films such as enzyme-immobilized layers or biocompatible layers. We describe...
In this letter, a TIR (turbo iterative receiver) structure is proposed for the 3G HSDPA (high-speed downlink packet access) systems. The TIR performs two successive soft-output decisions, achieved by a SISO (soft-input soft-output) multicode detector and a SISO turbo decoder, through an iterative process. At each iteration, extrinsic information is extracted from detection and decoding stages and...
Rail track geometric parameters, such as gage, level, longitudinal and alignment etc., have much influence on the operation safety of train vehicles. In this paper, a new measurement system for track geometric parameters is described. The measurement system is based on the three-point method for the straightness measurement, it uses laser sensor of displacement to collect data, uses notebook to process...
In this paper, the multiwall carbon nanotubes were opened and then filled with Cu and Ag materials. Several kinds of carbon nanotubes/epoxy composites were prepared by melt mixing epoxy resin and the nanotubers mentioned above. The dielectric properties of the composites were investigated at room temperature. Experimental results showed that the dielectric properties of the MWNTs/epoxy composites...
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