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Community structure has many practical applications, and identifying communities could help us to understand and exploit networks more effectively. Generally, real-world networks often have hierarchical structures with communities embedded within other communities. However, there are few effective methods can identify these structures. This paper proposes an algorithm HELPA to detect hierarchical...
Level set method for topology optimization are by now sophisticated and used in a wide variety of research areas. Level set method with mesh requires finite element analysis that is often complex and time consuming due to large sparse coefficient matrix of equations. This paper presents EBE-CG method to parallel compute large sparse linear equations for level set method based on normal conjugate gradient...
The tie-line power oscillation of two-area interconnected system after power impact is derived strictly. The dynamic equations before the disturbance and after the disturbance are constructed and the variation of the tie-line power is derived. Based on the theory of distribution of impact power in power systems, the tie-line power of two-area system after power impact is derived. The expressions of...
Based on the optimization theory and utility theory respectively, the model of the pricing and quality decision for the manufacturer and that of pricing and ordering for the retailer are built, the consumers' utility model as well. The complex relationship is given between policies of the supply chain members and consumers' price/quality sensitivity. Conclusions are as follows. In any purchasing period,...
During the execution period of composite Web services, the conventional centralized orchestration (CO) tends to incur various drawbacks such as unnecessary traffic, inappropriate dependencies, etc. Decentralized orchestration is advocated to solve these drawbacks but results in some other ones if the pure decentralized orchestration (PDO) is adopted such as high cost for component Web service proxy...
Cooperative Transmission of mobiles has been seen as an attractive solution to enhance network robustness. In the other word, network coding has been receiving more and more attentions for its ability to save power and improve the throughput of wireless network. In our paper, we consider an example of physical network coding in the wireless cooperative network, which consists of two source nodes,...
Some time-domain methods available for the solution of 3-D Maxwell's equations, including explicit methods such as the Yee-FDTD method, the Symplectic-FDTD method and the Turkel-FDTD method, and implicit methods such as the ADI-FDTD method, can be derived through different approximation schemes of the Exponential Evolution Operator (EEO) in Maxwell's equations. In addition, another new unconditionally...
In this paper, we deliver the diagonalization methods for the single user and multi-user D-STTD (Double Space Time Transmission Diversity) system. A single user D-STTD system is that one transmitter sends four streams to one receiver and a multi-user D-STTD system is that one transmitter sends four streams to two receivers. In the two scenarios, we utilize the special structure of HHH of D-STTD system...
A variational model which is used to locate at the boundary of the object in the designated region is presented in this paper. This is done by adding an intersect area term into our model, which will play an important role in this paper. In this model, we need to construct an energy functional ε using two level set functions. One is used to capture the object of interest, the other one indicates image...
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