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Search Results: 1 - 10 of 143986 matches for " Feng Wang "
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Biclustering of time-lagged gene expression data using real number  [PDF]
Feng Liu, Lingbing Wang
Journal of Biomedical Science and Engineering (JBiSE) , 2010, DOI: 10.4236/jbise.2010.32029
Abstract: Analysis of gene expression data can help to find the time-lagged co-regulation of gene cluster. However, existing method just solve the problem under the condition when the data is discrete number. In this paper, we propose efficient algorithm to indentify time-lagged co-regulated gene cluster based on real number.
The Introduction of Specific Water and Maximum Airborne Specific Water & the Improvement of Dynamic Equations on Non-Uniform Saturated Moist Atmosphere  [PDF]
Xingrong Wang, Yan Feng
Atmospheric and Climate Sciences (ACS) , 2015, DOI: 10.4236/acs.2015.53018
Abstract: To eliminate the irrational supposition that condensed liquid water always falls immediately, specific water m?and maximum airborne specific water mm are introduced into the dynamic framework on non-uniform saturated moist atmosphere (m?is the ratio of the airborne liquid water mass to the moist air mass in unit cubage moist air, mm is its maximum value with \"\" , \"\" , \"\" and \"\" are airborne coefficient, vertical velocity and saturated specific humidity respectively). The balance equation between water vapor and airborne liquid water is derived. From the balance equation, a new formula of precipitate rate is got. The analysis shows that in the air stream with some upward vertical velocity (\"\" ), the condensed liquid water can precipitate under the condition with \"\" (q is specific humidity) and?\"\" only, otherwise it is detained in the air and becomes airborne liquid water. Not only does precipitating liquid water contain condensed liquid water, but also contains converged and existing airborne liquid water. Following above discussion, improved dynamic equations on non-uniform saturated moist atmosphere are provided.
Abusive Supervision and Counterproductive Work Behavior: Moderating Effect of Negative Affectivity  [PDF]
Feng An, Bing Wang
Journal of Service Science and Management (JSSM) , 2016, DOI: 10.4236/jssm.2016.91009
Abstract: In this study, the methods of literature study and questionnaire research are used with foreign mature scale analysis technique. Employees in manufacturing enterprises are surveyed for data collection. Based on 321 valid questionnaires with correlation analysis and linear regression method, effective data collection is achieved and aimed to explore the relationship among abusive supervision, counterproductive work behavior and negative affectivity of the employees. The results showed: abusive supervision and counterproductive work behavior of employees has a significant positive correlation; negative affectivity of employees is an intermediary variable. The significance of the survey in practice is to encourage leaders of enterprises to improve their strategy of management and pay more attention to the mental health of the employees.
Performance of Block Diagonalization Scheme for Downlink Multiuser MIMO System with Estimated Channel State Information  [PDF]
Feng Wang, Marek E. Bialkowski
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2011, DOI: 10.4236/ijcns.2011.42010
Abstract: In this paper, we study the performance of block diagonalization (BD) scheme for a downlink multiuser multi-input multi-output (MIMO) system with imperfect channel state information (CSI). At each mobile user, information about the channel is obtained by applying the minimum mean-square-error (MMSE) channel estimation method. The channel state information is fed back to the base station through error-free uplink channels. A theoretical analysis is performed showing that channel estimation errors contribute to co-channel interferences thus deteriorating sum rate capacity. Computer simulations are performed to evaluate the impact of channel estimation errors on the sum rate capacity. The results show that if the MSE of the channel estimation is not less than 10-2, the impact of channel estimation errors is significant and cannot be neglected. To combat this adverse effect, a proper transmit power level is required for the training signals.
Beam Selection and Antenna Selection: a Hybrid Transmission Scheme over MIMO Systems Operating with Vary Antenna Arrays  [PDF]
Feng Wang, Marek E. Bialkowski
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2011, DOI: 10.4236/ijcns.2011.410078
Abstract: In this paper, we have proposed a hybrid transmission scheme which involves beam selection and antenna selection techniques over a MIMO system operating with vary antenna array. Optimal subset of transmit antennas are selected via fast successive selection scheme designed to optimize the target eigenbeam. Optimal eigenbeams corresponding to the largest singular values of the new MIMO channel formed by the selected antennas are exploited for data transmission. To evaluate the performance of the proposed scheme, different array structures, including uniform linear array (ULA) and including uniform circular array (UCA) are employed in the simulations. The transmitter is assumed to be surrounded by scattering objects while the receiver is postulated to be free from scattering objects. The Laplacian distribution of angle of arrival (AoA) of a signal reaching the receiver is postulated. The results presented by this paper indicate that the proposed scheme can significantly improve the performance of data transmission in term of symbol error rate (SER).
The Efficiency for the Three Industries of Provinces in China, Considering the Effects of Carbon Emission: An Application of the Parallel DEA Model
Feng Feng,Jinlai Wang
Asian Social Science , 2012, DOI: 10.5539/ass.v8n12p28
Abstract: In this paper, a parallel DEA model was established and applied to evaluate the production performance of 29 provinces from China in 2009, considering the effects of CO2 emission. Meanwhile, a CCR DEA model was also used to evaluate the efficiencies for each industry, respectively. Our calculated results reveal that: a) the production efficiency for each province is relevant to the economic development level; b) the efficiencies are of great differences between regions, i.e., the eastern coastal area is more highly efficiency than the western interior area significantly; c) the efficiency of the primary industry are higher than those of the secondary industry and tertiary industry in average, and the score for tertiary industry efficiency is of the least influences of regions.
Tumor micrometastasis and its treatment with traditional Chinese medicine
Zhong Xi Yi Jie He Xue Bao , 2003,
Abstract: ABSTRACT: This paper discussed the detection of tumor micrometastasis, and analysed the influence of chemotherapy and blood transfusion on the immunity of tumor patients. Chemotherapy and blood transfusion can increase the opportunity of tumor metastasis. By analysing the mechanism of the treatment of tumor with traditional Chinese medicine, the author put forward the new method about eliminating tumor micrometastasis with traditional Chinese medicine.
A volume stability theorem on toric manifolds with positive Ricci curvature
Wang Feng
Mathematics , 2012,
Abstract: In this short note, we will prove a volume stability theorem which says that if an n-dimensional toric manifold $M$ admits a $\mathbb{T}^n$ invariant K\"ahler metric $\omega$ with Ricci curvature no less than 1 and its volume is close to the volume of $\mathbb{CP}^n$, $M$ is bi-holomorphic to $\mathbb{CP}^n$.
A Novel Digital Rights Management Scheme in P2P Networks  [PDF]
Jing Feng, Ruoshan Kong, Yulin Wang
Communications and Network (CN) , 2010, DOI: 10.4236/cn.2010.24033
Abstract: P2P networking is a distributed application architecture that partitions tasks or workloads between peers. How to integrate P2P networks and DRM to offer a novel content distribution mode for digital media resources is a significant research project. In this paper, a novel DRM architecture in P2P Networks is proposed, three phases include content provide phase, content purchase phase and content access phase, are modeled, and key technologies are introduced. Finally analysis indicates that the proposed scheme has the characteristics of security, controllability and scalability.
Investigations into the Effect of Spatial Correlation on Channel Estimation and Capacity of Multiple Input Multiple Output System  [PDF]
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2009, DOI: 10.4236/ijcns.2009.24029
Abstract: The paper reports on investigations into the effect of spatial correlation on channel estimation and capacity of a multiple input multiple output (MIMO) wireless communication system. Least square (LS), scaled least square (SLS) and minimum mean square error (MMSE) methods are considered for estimating channel properties of a MIMO system using training sequences. The undertaken mathematical analysis reveals that the accuracy of the scaled least square (SLS) and minimum mean square error (MMSE) channel estimation methods are determined by the sum of eigenvalues of the channel correlation matrix. It is shown that for a fixed transmitted power to noise ratio (TPNR) assumed in the training mode, a higher spatial correlation has a positive effect on the performance of SLS and MMSE estimation methods. The effect of accuracy of the estimated Channel State Information (CSI) on MIMO system capacity is illustrated by computer simulations for an uplink case in which only the mobile station (MS) transmitter is surrounded by scattering objects.
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