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Credit risk evaluation under the background of big data has been the major focus of financial and banking industry due to recent financial crises. Recent studies have revealed that emerging modern optimization techniques are advantageous to statistical models for credit risk evaluation, such as LS-SVM. In this paper, a least squares support vector machine with mixture kernel (LS-SVM-MK) is proposed...
The short-term hydrothermal generation scheduling problem is aimed to minimize the total thermal plant cost while satisfying diverse hydraulic, thermal and load balance constraints. Firstly, a multi-reservoir cascaded hydro power system is set up. The power system consists of several cascaded hydro plants and several thermal plants. The power generation function is the function of water discharge...
Authors of obfuscated malicious code generally use the code obfuscation counter technology to improve the difficulty of being reversely analyzed for programming and hide critical code, data and program logic. The detection for malicious code of code obfuscation has become one of the popular topics being researched both domestically and abroad. In this study, a method for detecting the obfuscated malicious...
In this paper, a test case reuse model, Test Case Reuse Model , is proposed as a solution to the normative, effectiveness and efficiency issues for the design of test cases for software. Test Case Reuse Model is a refinery, extraction and expression of design methods of test cases in test case sets with similar features of test requirements. Test Case Reuse Model consists of five components, which...
The weighted least squares estimation is often used in distribution state estimation, which is characterized by weights fixed, but without robustness. In this paper, we revise the weights according to residual changes of iterations. This method employs node voltage magnitude and phase angle as state variables. A distribution network is considered to test variable weights method as an example. The...
Hybrid pumped storage power station refers to the general hydropower station combined with reversible pumped storage units, which can accomplish such functions as energy storage, power generation, peak clipping and valley filling, and etc. The energy reserve will become a significant aspect on the process of constructing the strong smart grid, and pumped storage power station, serves as a kind of...
In the background of deregulated electricity marketplaces, the electricity price is not determined by a power authority but by competitive bidding behaviors of power suppliers. Competitive bidding makes power supplies being no longer just the electricity price takers. Each power supplier becomes involved in setting the electricity price. He could maximize his own profits according to information of...
Electric Power Information Networks are the infrastructure, which not only ensures electric power system operating securely as well as stably, but also promotes power companies'effective and continuable run. Electric power dispatch systems, management information systems, customer relation systems and so on, are all built on this infrastructure. It is an important task for network administrators of...
In view of the free content distribution in multicast on Internet, a mechanism for constructing the minimum cost multicast routing tree is proposed based on the theory of economic mechanism design. The minimum cost multicast tree can minimize the total transmission cost of the tree, minimize the links connecting the specified multicast group members and save the data transmitting cost and network...
Relay protection simulation requires real-time, flexibility and high fidelity. According to the characteristics of hydropower station simulation training, general structure of hydropower station relay protection simulation training system is firstly designed. Secondly, data concept model for hydropower station relay protection simulation training system is built by using entity-relation approach,...
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