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As a kind of parallel light, sunlight can be used for positioning. Light sensors are attached to each side of an octagona cylinder to achieve solar orientation. By theoretical analysis, design and test of a prototype, a fixed structure test method for sun orientation is verified. The instrument presented can be a foundation of new navigation device.
Failure of one or multiple critical nodes may partition wireless sensor networks into disjoint segments, and thus brings negative effect on the applications. We propose DCRS, a Distributed Connectivity Restoration Strategy to tolerate the failure of one critical node. Because of the energy restriction of sensor nodes, the energy overhead of the recovery process should be minimized to extend the lifetime...
In view of the problem that currently the students choose online test questions blindly, the establishment of the item recommendation system is necessary. According to the student's level, an estimating algorithm is used to sort items and recommend the question which is in the front of the sort to the student. According to the study of student over a certain period of time and all the answers to the...
Aim: provide referential comprehensive model for evaluation of beauty of the body type of female students in college. Methods: basing on the test data of series of body shape indicators of female students in college aged 18 to 23 and the subjective ratings of their beauty of body type by teachers, use statistics analysis to select typical indicators and build the mathematical model of evaluation of...
This paper studies the integration of VRML and Ja-va3D in the Web3D core technology, and adopts Java3D to implement the virtual scene displaying and the users and virtual scene interactive roaming function, promoting users to experience the 3D stereo model displaying way online without leaving home.
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