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A two-stage data envelopment analysis (DEA) model is created to provide valuable managerial insights when assessing the dual impacts of operating and governmental strategies for the Science and Technology Activity Efficiency. This new model is used to analyze the inputs and outputs for the science and technology activity in the region and how to achieve efficiency systematically. In this paper, it...
The SSE-50 ETF and SSE-180 ETF are extremely familiar no matter in the index-establishing or the characteristics of index, so this thesis selects the SSE-50 ETF and SSE-180 ETF as the research objects, then analysis the tracking errors of SSE-50 ETF and SSE-180 ETF empirically in three ways, finally, the thesis discusses the reasons which make the different tracking errors between SSE-50 ETF and SSE-180...
Product quality control and management has been so different in supply chain environment. Companies should control not only their own products but also the products and the factors that influenced the products from their supplier. In this paper, control charts and process capability analysis will be used for the management of supplier quality control to help the supplier reach the needed quality level...
Pavement Preventive Maintenance (PPM)technologies is adopted to predict the performance of pavement and select effective strategies on the expressway, the method can enormously extends the service life of pavement and result in lower maintenance costs. This paper describes prediction of highway pavement performance by means of gray system theory, and the gradual solution, which leads to the optimal...
This paper focuses on how to improve the performance of Genetic Algorithm (GA). Considering operators' importance, two creative intelligent parameters were built to evaluate and control the evolution calculation process. Meanwhile Pseudo calculation has been discussed and integrated into the classical GA. At last, simulation calculations with testing function have been given. It has been clearly shown...
The color histogram based image retrieval method is simple and efficient but losing the spatial distribution information of the color. In this paper, a vector quantization index histograms based image retrieval method is presented. The content of one image is looked as the index frequency histograms of the vector quantization of image blocks. The similarity between two images is computed according...
Dispatching centers are regarded as the heart of the integrated network both in generation and transmission network and play an important role in safe and stable operation and also have a great importance observing economical usages. Basically stepwise dispatching system is corresponding to electrical network structures and the ministry of power management methods, and also has to be more flexible...
An improved overlay analysis algorithm based on monotone chain and STR (Sort-Tile-Recursive) tree index is introduced. The algorithm can save the time for vertex listing and intersection point computation, also the memory space. Making full use of the function of overlay analysis for simple features, as many as possible nodes of the polygon can be filled in the STR tree index structure. The algorithm...
Numerous capital has been invested in technologic upgrading project every year by provincial power companies on electric energy metering units, in order to prevent electricity larceny. But the technologic schemes are various and different, as the project funds are allocated in batches annually. Thus the key issue of the upgrading project lies in how to work out the proper implementation order of those...
This paper applies RBF (Radial Basis Function) neural network to the outlier test of flight data based on the features of flight data. It tests the outlier situations of the output target parameters by establishing the reasonable functional relationship model as well as fitting the functional relationship between the input parameter and the output parameter of the aircraft engine system. Considering...
After the occurrence of grid emergency, fast and accurate evaluation of harmful levels of the incident and identification of disaster-level are the basis for activate contingency plans, reasonable allocation of resources and thus crisis management. Combined with the practical, the paper sets up grading evaluation index system of power emergency from the power grid losses, the user lossed and accident...
In this paper, the Hopf bifurcation is studied that present at dynamic power system. Some conditions that guarantee Hopf bifurcation exist in dynamic power system are given. A new method is structured to detect the Hopf bifurcation, which is able to detect direction of dynamic change of the real parts of the eigenvalues as the parameter change. The eigenvalues that cross firstly the imaginary axis...
The traditional rules to classify and subdivide map were broken, and a new method of map data generation and management was put forward in this paper, based on Pyramid Model and Quad Tree Model, according to the characteristic of data scheduling in network environment. Also the procession flow to get Quad Tree map data using standard map sheet data, non-standard map sheet data or Quad Tree map data...
This paper proposes a new environmental friendly evaluation criterion to assess the comprehensive performance of coal-fired power plant. The new evaluation criterion, which is called the comprehensive Index of Energy, Resources and Environment (IERE), can synthetically evaluate the thermal, economical and environmental performance of power plants. Based on the new criterion, the paper analyzes the...
A fluctuation model of cascading overload in power networks is developed in this paper. The aim of developing this model is to provide a new angle of view for the cascading overload phenomenon and find some regularities. An example in IEEE14 system is also provided for this aim. In this example, the fluctuation indexes are calculated on the basis of analysis for cascading overload. The results of...
In the background of the research and construction of smart grid, a discussion on determining the grid's maximum loading index is presented. Feasibility of dealing with peak load by demand response is analyzed based on risk theory in order to defer upgrading generation, transmission and distribution facilities, optimize electrical resources and reduce the impact to environment.
The power grid security assessment is used to analyse the existing dangerous and harmful factors of power grid, judging the potential risks as well. The assessment results can provide scientific basis for prevention of accidents and guide management decision-making. In this paper we analyse the various factors that affect the power grid security and propose an indices system for power grid security...
This paper presents an approach to prioritize maintenance tasks in power distribution system based on reliability models. This approach define weighted average system reliability index WASRI employing reliability indices SAIFI, SAIDI, MAIFI and interruption cost, which reflecting failure cost of specific component. The benefit of maintenance task is defined as improvement of WASRI. This approach ranks...
Taking the independently designed in-vehicle Bluetooth high glossy product as an example, in combination with the Taguchi experiment and the simulation technology, the experimental research of the impact of Rapid Heat Cycle Molding(RHCM) process on the sink mark of the product is conducted through the introduction of interference factors. The results show that the technical characteristics of high...
In dynamic grid environment, distribute a large number of different types of services and resources. F fast and accurate resource and service discovery, this article proposes a new structured Gossip messages spread algorithm, called S-Gossip, this algorithm has good redundancy and completeness. We describes in detail the implementation of the algorithm and protocol, and on this basis, the establishment...
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