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This paper is aimed at solving the problem in the data acquisition process of WSN network, such as energy problem, the correlated problem of data acquisition and the dynamic problem of network topology. An efficient data collection solution based on TRIZ contradiction matrix and innovation principle is presented in the paper. Firstly, the contradiction matrix is used to obtain the corresponding principle,...
Thermal error modeling is an effective approach to ensure the machining accuracy of NC machine tool by which the thermal error compensation could be implemented. The accuracy and robustness of the thermal error model are affected by the arrangement and identification of the temperature measuring points directly. This paper presents a new approach combining Grey Correlation and Kohonen network to optimize...
Under the considerations of trading costs and efficiency, more and more investors choose the way of online stock trading which is fast, convenient, and has preferential fee. The cost of establishing a new customer is five times more than maintaining an old one. As a result, to explore the investors choose continuous usage behavior of online security trading system as reference for security industry...
Earnings management has always been one of the main means to polish performance reports of listed companies. As most interests' stakeholders' understanding of the company is from the financial report, the earnings management motivation from managers will exist for them to affect decision-making of stakeholders in listed companies. This paper, considering the participation of stakeholders, and the...
This paper discusses the fractal feature of pore structure based on the capillary pressure data of mercury withdrawal and mercury injection. Also, the paper calculates the fractal dimension of pore structure of He8 zone in Sulige gas field. The study results show that fractal feature of mercury injection capillary pressure curve has a property of two-stage with an obvious bend, which shows the double-porosity...
This essay takes 199 listed companies between October 23, 2009 and December 31, 2011 as samples to study the relationship among intrinsic value of the company, investor sentiment and the IPO under-pricing in the growth enterprise market. Results show that the intrinsic value of the company, investor sentiment and corporate governance is the main factor to affect GEM IPO under-pricing, while industry...
Traditional image subcategory classification methods combined multiple features into a feature vector. Such methods neglect distinct roles of diverse features on discriminating image subcategories. In this paper, the Dempster-Shafer evidence theory is applied to fuse different features in image subcategory classification. It considers the different contribution of each feature to image classification...
In this article, we utilize the research methods of complex network to discuss the inter-province knowledge spillover in China based on paper cooperation from 1980 to 2009. We analyze the topology of the knowledge spillover network by measuring the degree distribution, average path length, clustering coefficient, clustering and degree correlation, and find that the (1)degree distribution is similar...
Industrial cluster, like the organism, has its own process of evolution. Clusters from birth to the growth stage, have completed the initial accumulation of capital, and began the evolution to the mature stage. How to successfully evolve becomes the research focus in the majority of scholars. In this paper, we study the dynamic factors of the growth stage of industrial clusters in HeBei Provice, JingXian...
This paper develops a framework to analyze how markets expectations and their influencing factors work on RMB fluctuations. Using the method of two-stage least square, the paper concluded that market expectations are one of the important factors that driving the strong RMB during the period of Jan. 2001 to June 2009. The appreciation of RMB in the previous period consolidated the confidence of market...
In this study, total of 261 soil profiles were reported to investigate the Cu spatial distribution and vertical variation in Guangdong province using geography information system (GIS) and geostatistics. Findings indicated that the Cu geometric mean concentration of 11.2 mg/kg in surface soils is lower than those in China, which ranged from 0.12-98 mg/kg. The influence of soil properties on Cu concentration...
According to the definition of autocorrelation matrix (ACM), this paper was proposed a new autocorrelation matrix construction method. In comparison to traditional least square algorithm based on eigenvalue decomposition (LS-EVD), the presented method improved the estimation accuracy of eigenvalue. In addition, dividing signal subspace and noise subspace in a new method, which reduced the estimation...
In recent years, the developing speed of emerging technologies keep accelerating. Correctly understanding the future trend of technologies can help the government and enterprises formulate R&D strategies, and then seize the chance. Therefore, the research in Technology Trend has increasingly becomes a hotspot in technology management. First, the article puts forward four main aspects that technological...
We investigate the fluctuation of the energy in the framework of Tsallis statistics and find the correlation plays an important role in energy fluctuations. In Tsallis statistics, the correlation is induced by the nonextensivity of Tsallis entropy and exists between particles even if the particles are dynamically independent. By taking the generalized ideal gas as an example, we get that when the...
As the typical CDMA application, the spread spectrum pseudorandom noise (PRN) codes in GPS are C/A code applied to standard positioning service and P code applied to precise positioning service presently. P code has a higher tolerance to jamming and spoofing compared with the C/A code, but P code is usually acquired depending on C/A code.In the precondition of good cross correlation and partial autocorrelation...
What kind of achievement goals do Chinese students choose and pursue? The current study demonstrated a culture-specific achievement goal, i.e., instrument goal, and investigated its relationship with learning strategy and academic achievement. 536 students from a middle school in northeast China participated in the current investigation. The findings provided a further support that instrument goal...
Disclosure quality is very important to listed companies and capital market. Based on factor analysis method this paper presents a disclosure quality index that is well verified by the assessment results of Chinese Shenzhen Stock Exchange. The index focuses on three aspects: corporate governance, firm structure characteristics and financial situation. The index has three advantages compared with previous...
Financial constraint, which is very common in emerging markets like China, have significant effects on firmspsila investing and financing decision in imperfect markets. The extent to which firms are financially constrained determines which type of financing and investing policy firms may choose, and thereby affects firmspsila sensitivity to the fluctuation of aggregate economy, i.e. systematic risk...
In the study of location partial discharge in transformer based on the UHF method, in order to accurately locate partial discharge source, precisely achieving time delay of different signals which are received by different UHF sensors and radiated from the same partial discharge source is essential. Three methods of time delay estimation are introduced and compared, including the initial peak, the...
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