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The low-meeting point chloride salt/expanded graphite (Lankan-Cl/EG) phase change composites were pre¬pared by vacuum impregnation using anisotropic ally formed expanded graphite (EG) as the skeleton and low-milling point quaternary chloride said (Lankan-Cl) as the phase change material, and the phase change composts were cha- actualized by scanning electron microscopy (SEM), X-ray diffractometer (XRD) and fibermogravimetry (TG). The m- ceroscopy morphology, crystalline structure and thermal stability of the phase change composites were characterized by scanning erection microscopy (SEM), X-ray diffractometer (XRD) and ihermogravimetry (TG), the mailing point, mailing enthalpy and septic heat capacity of the phase change composites were measured by differential scanning call- oximetry (DSC), and the thermal diffusion coefficient was measured by easer lash analysis (LFA). The results showed that Lankan-Cl was successfully impregnated into the interior of EG, and EG maintained an intact pore structure. The meting point of Links-Cl/EG is 169.0 C with a slight decrease compared to that of LiNaKZ-Cl due to the hetero-generous nucleation of EG. Links-Q/EG retains the high thermal conductivity of the EG skeleton, with 53.7 W/(m • K) and 23.1 W/(m • K) in the downward and normal directions, respectively, at room temperature. The mailing en-thalpy of Links-Q/EG is 63.3J/g, and the high mass ratio of Links-Cl in Lankan-Q/EG ensures the heat storage capacity of phase change composites. The prepared Lankan-Q/EG is thermally stabe and can be used at tempera¬tures up to 500 C. The thermal conductively is greatly improved compared with that of Links-Cl, which can improve the efficiency of heat charging and discharging in the field of medium temperature thermal storage. [ABSTRACT FROM AUTHOR]

Sharing of wireless channel causes mutual interference among user equipment in wireless networks. In this paper, the problem of uplink interference suppression in the architecture of C-RAN wireless network is investigated. Taking advantage of the centralized processing in the C-RAN architecture, the correlations of the signals from each RRU are analyzed, based on which we proved that under certain condition, interference can be eliminated by utilizing the correlations a-mong signals. Moreover, we proposed a correlation matrix among network users that was established based on signals from each user to their nearby RRU. Then, the interference cancellation matrix was solved by the correlation matrix. We utilized the achieved interference cancellation matrix to process the uplink signals for the elimination of uplink interference. Simulation results by applying 4QAM and 16QAM modulation schemes indicate that, our method significantly improves the bit error rate compared to the traditional reception methods. In addition, the descent of bit error rate becomes faster as the background noise decreases. [ABSTRACT FROM AUTHOR]