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Recently, densified small cell deployment with overlay coverage through Heterogeneous Networks (HetNets) has emerged as a viable solution for 5G mobile networks. Cell Outage Detection (COD) which is the essential functionality in Self-Organizing Network (SON) is designed to autonomously deal with unexpected faults. Typical methods for detecting cell outage are usually based on Manual Drive Tests (MDT)...
By analyzing the common sparse problems of the score data in the collaborative filtering recommendation system, this paper presents a recommendation method for mobile networks based on user characteristics and user trust relationship. In this method, the similarity of user characteristic attributes is used to modify the similarity calculating of the original score. Then, according to the communication...
Reducing the energy consumption (EC) of base station (BS) is one of the major concerns in wireless cellular networks. Additionally, turning off some underutilized BSs during off-peak period and performing effective compensation without delay are the most efficient way to save energy. However, large-scale energy conservation yet remains to be investigated at macro level. In this paper, to solve the...
RBAC model has provided a framework for access control and it has also been successfully applied in many fields. However, the access-division granular in RBAC model is not fine enough and its role hierarchy mechanism cannot response agilely as required. To deal with these two disadvantages, the object-oriented thoughts and the RBAC model are combined and then the Object-oriented Fine-grained RBAC...
Nonlinear simulated annealing is introduced into two-dimensional magnetotelluric inversion in this paper. Adaptive regularization method is also adopted. Testing the algorithm on synthetic model shows the availability of simulated annealing regularized inversion method, which can obtain a stable solution closing to the fact.
Pre-computing is an ordinary way to improve the response time in an OLAP application. With the extension of main memory, establishing a cache structure and pre-loading the data into memory with the free memory can further speed up the query response time. The paper gives out an implement of a cache structure in the LE-OLAP, and describes the query and the elimination algorithm of the cache in detail.
Belt conveyor is one the most important equipments for bulk material transportation. Traditional static analysis methods can not meet the design requirements of the heavy-duty belt conveyor. In this study virtual prototyping (VP) technology is applied to virtual simulation of belt conveyor. The simplified prototype of belt conveyor is established by RecurDyn software. And the VP can simulate belt...
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