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Based on a broadband near-zero refractive index metamaterial, the unit structure is simulated by electromagnetic software HFSS, and its reflection-transmission parameters are extracted. And the classical inversion algorithm is used to derive the band in the 16–17.5GHz with the same permeability and permittivity. However, the effect of near zero effect is not ideal and the refractive index is zero...
Although previous studies have demonstrated that fundamental frequency (f0) is a significant cue in tone perception, there are other factors influencing it (e.g., segments). In the present study, we explored Initials and Finals' effect on tone perception. One perception experiment was conducted with six continua (i.e., Tone 2-Tone 3) based on syllables which include three types of Initials (i.e.,...
Correlation difference timing scheme (CDTS) algorithm based on cross-correlation difference and correlation summation peak protection is proposed to address the critical issue of symbol timing synchronization for MB-OFDM based UWB systems. The two step synchronization scheme attempts to locate the start sample of the frame sequence (FS) by firstly calculating the cross correlation difference of received...
This paper presents a systematic discussion on the principal factors which influence the grain production through fuzzy clustering analysis method and multiple linear regression. Then, the proportion of all the factors are obtained though fuzzy comprehensive evaluation method, which provides a reliable theoretical basis to how to improve grain production.
Wireless heterogeneous networks have emerged as a new paradigm to meet the fast increasing wireless capacity and coverage demands. Coordinated Multipoint Processing (CoMP) and Precoding are two promising techniques to further improve the network capacity and spectral efficiency. This paper presents an optimal intra-cell CoMP resource allocation scheme in a wireless heterogeneous network and explores...
Motion information occupies a considerable portion of the bit stream generated by the state-of-the-art video codecs. As a sequence, reducing bits on motion information can improve the overall performance of video compression. Various competition based motion vector coding (MVC) schemes were proposed for this goal. In this paper we propose a region based motion vector prediction (RMVP) algorithm to...
With regard to the frequent food supply chain risk incidents situation, This paper divides the hierarchical structure of food supply chain risk factors with F-AHP, and buildes a food supply chain risk factor identification system and risk fuzzy comprehensive evaluation model on the basis of definition of food supply chain. Meanwhile, by taking the food supply chain of one diary producer for example,...
Coverage optimization is a critical issue in 802.11 Wireless LANs planning problems. In this paper an immune network algorithm named opt-aiNet is studied in order to automatize the planning process by optimizing the BS's (Base Station) sites. Compared the results of opt-aiNet and genetic algorithms(GA) which have been used in radio coverage optimization before, we found that opt-aiNet could find the...
It is a hot issue of current research that how to strengthen the land use management, so that resources and environmental capacity, land development costs and industrial construction and agricultural production would be spatial balanced to promote regional sustainable development in rapid urbanization and industrialization process. A Case Study in Langfang city of Hebei province was made. Based on...
The paper has built a quantitative fuzzy decision model for FM (facility management) outsourcing. Firstly, an evaluation index system has been built based on SWOT analysis. Then a mathematical method integrating AHP, Fuzzy math and geometry is introduced for computing the geometric decision vector of FM outsourcing. Through a geometrical analysis on the vector, the dominant factor of the FM outsourcing...
In this article, a novel dual codebook based multi-user multiple-input multiple-output (MU-MIMO) precoding and scheduling scheme with limited feedback for downlink transmission is proposed. The proposed dual codebook based MU-MIMO scheme utilizes the first codebook for limited feedback and the second codebook for scheduling and precoding for multiple users at the BS. This paper explores a simplified...
Aiming at applying fuzzy evaluating theory to conventional experiments in course of surveying, this paper elaborates the importance of synthesized evaluation of conventional experimentspsila performances in course of surveying. It also discusses the thread of thought used to establish the model of synthesized fuzzy evaluating system of conventional experimental performances in course of surveying...
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