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A track circuit is a critical component of a modern railway system. The circuit is used to detect the absence of a train on rail tracks and produce corresponding control signals. A railway track has many block sections, each of which has a separate track circuit device. A track circuit receiver analyzes signals sent from a track circuit sender and produces a signal to control a relay. When the train...
Attribute Based Access Control (ABAC) is a popularapproach to enterprise-wide access control that providesflexibility suitable for today's dynamic distributed systems.ABAC controls access to objects by evaluating policy rulesagainst the attributes of entities (subject and object),operations, and the environment relevant to a request, butgreat care must be taken in setting up and maintaining theaccess...
Some conflicting results have been reported on the comparison between t-way combinatorial testing and random testing. In this paper, we report a new study that applies t-way and random testing to the Siemens suite. In particular, we investigate the stability of the two techniques. We measure both code coverage and fault detection effectiveness. Each program in the Siemens suite has a number of faulty...
Enhancing the educational technology capacity for teachers is an important part of the education informatizaton. It is demanded by the professional development of teachers and instruction reform. This paper provided some strategies of enhancing the educational technology capacity for teachers according to the present educational situations of universities. The strategies provided five aspects such...
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