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In this paper, we use a advanced method called Faster R-CNN to detect traffic signs. This new method represents the highest level in object recognition, which don't need to extract image feature manually anymore and can segment image to get candidate region proposals automatically. Our experiment is based on a traffic sign detection competition in 2016 by CCF and UISEE company. The mAP(mean average...
Auction based participant selection has been widely used for mobile crowd sensing (MCS) to achieve user incentive and assignment optimization. However, mobile crowd sensing problems solved with auction-based approaches usually involve participants' privacy concerns because a participant's bids may contain her private information (such as location visiting patterns), and disclosure participants' bids...
Systems chemical biology integrate chemistry, biology and computation tools as a whole system, which can help researchers to deeply study the interaction and relationship among small molecules, such as genes, proteins, targets, compounds and so on. With systems chemical biology, researchers can concentrate on new way of drug discovery, including drug target path discovery, which can not only help...
We consider a setup in which Alice selects a pdf ƒ from a set of prescribed pdfs P and sends a prefix-free codeword W to Bob in order to allow him to generate a single instance of the random variable X ∼ ƒ. We describe a universal coding scheme for this setup and establish an upper bound on the expected codeword length when the pdf ƒ is bounded, orthogonally concave (which includes quasiconcave pdf),...
A kind of novel calibration system for measuring inhomogeneity of magnetic field of medical nuclear magnetic resonance was introduced in this paper. The error owing to inhomogeneous magnetic field was prevented by the greatest extent. By virtue of feasibility analysis of calibration system operation, it was proved that specially designed calibration system completely satisfied measuring purpose of...
Wireless sensor networks can monitor physical and environmental conditions inexpensively, and the networks have been widely used in military and civilian applications. The sensor nodes in the networks not only have the ability to sense, but also can supply data storage, computation and communicate with each other. However, energy efficiency is the major concern in wireless sensor networks, which usually...
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