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The wide diffusion of information in social networks can be exploited to solve searching-for-a-target (SFT) problems including those of missing individuals. Incentive mechanisms that promote active individual participation can be designed to favor a clear propagation direction to help efficiently find a target. However, the existing incentive research rarely focuses on a clear propagation direction based on a specific goal. Thus, we propose an effective contribution-driven information propagation incentive mechanism (IPIM) that exploits ego networks to solve the SFT problem. First, we use an all-pay auction-inspired model to determine the propagation of alters in each ego network. We then propose a novel algorithm, the node propagation utility, based on effective contributions, to focus the propagation toward the target rather than searching indiscriminately and inefficiently. The theoretical analyses and simulation results indicate that IPIM guarantees the truthfulness, individual rationality, and budget feasibility. The simulations are conducted based on real and public social datasets. The IPIM shows increased efficiencies of 951.18 % of success rate, of 215.65 % in propagation hops, and of 514.41 % in participation scale, compared with a typical incentive mechanism. In conclusion, the IPIM shows significant value in the potential application in SFT.

Image compression is one of the major services in space flight mission and remote sensing system. This paper presents a high speed and high performance image compressor for future spacecrafts and micro-satellites. The proposed compression core is based on a modified CCSDS algorithm and the processing speed is improved 40 times using parallel architecture and pipeline technique. The experimental results indicate that this core has high performance at coding efficiency, data rate and error containment. A data rate of about 12.5Mpixels/s can be sustained at 50MHz.

Blood coagulation detection technique based on the principle of the liquor resonance is introduced in this paper. Liquor testing equipment was adopted to measure resonance frequency of blood plasma. Any liquor has its own especial electrical resonance frequency, and electrical resonance frequency is related with the characteristics of the liquor itself. In the process of blood coagulation, the characteristics of the blood plasma were changed fundamentally. Therefore, it can reflect the process of blood coagulation by measuring the electrical resonance frequency.