A comprehensive method applying a nonlinear frequency compression (FC) as complementary to multiband loudness compensation is proposed, which is able to improve loudness compensation and simultaneously increase high-frequency speech intelligibility for digital hearing aids. First, to avoid the spectral distortions in the sounds, speech intelligibility-based frequency spectrum splitting is introduced. Then a nonlinear FC (NLFC) is also proposed to compress the high-frequency sounds to the lower bands where the audibility is available. Moreover, the introduced NLFC adjusts compression ratio (CR) based on the speech intelligibility percentage in different frequency ranges. Finally, an adaptive wide dynamic range compression (AWDRC) with a time-varying CR is applied to achieve adaptive loudness compensation, and prevent the stationary CR of the typical wide dynamic range compression (WDRC) from generating a negative impact on the speech. The experimental test results show that the mean speech identification is improved at least 20% points in comparison with the typical WDRC or the conventional FC.

The retrieval product of COSMIC (constellation observing system for meteorology, ionosphere, and climate) radio occultation sounding system was verified using the Chinese radiosonde from 2007 to 2010. The horizontal distance between radiosonde station and the occultation event is within 100 km, and the time window is 1 hour. The comparison is performed from 925 hPa to 10 hPa. Result shows that the temperature of COSMIC agrees well with Chinese radiosonde. The mean temperature bias is ?0.08 K, and the standard deviation is 1.67 K. The water vapor pressure of COSMIC has notable systematic bias from radiosonde on layers above 200 hPa. On layers below 200 hPa, the mean absolute deviation of specific humidity is about +0.080 g/kg, and the standard deviation is about 0.692 g/kg, the mean relative error of water vapor pressure is about +69.6%, and the standard deviation is about 160.0%. The COSMIC quality control process fails to detect some extremely small humidity data which causes large relative error. Here also provides a comparison of 6 radiosonde types with COSMIC product. As result is affected by the background bias from radiosonde which differs on different regions, the COSMIC retrieval product could be used as benchmark if precision requirement is not strictness.

The size effect of the raw B powder on the MgB₂ phase formation is studied by the technique of in-situ high temperature resistivity (HT-ρT) measurement. The onset temperature, T_onset, and the completion temperature, T_PF, of the phase formation are determined directly during the ongoing thermal process. These two temperatures, T_onset and T_PF of the sample synthesized using nanometer B and Mg powders (NanoB-MgB₂) are 440 and 490℃, respectively, the same as those of the sample using micrometer B and nanometer Mg powders (MicroB-MgB₂). This indicates that the phase formation temperature of MgB₂ do not depend on the B powder size. The upper limit of the sintering temperature, T_N, above which the sample loses superconductivity, is below 750℃ for NanoB-MgB₂, much lower than 980℃ for the MgB₂ prepared using micron-sized B powder and millimeter sized Mg powder (DM-MgB₂). In comparison with the sample directly sintered at 650℃<T_N, an interesting, irreversible transformation in the crystal structure of the MgB₂ phase is observed with the sample going through the stages of initial sintering at 750℃, then re-sintering at 650℃ in an Mg-rich environment after the processes of regrinding and pressing.

In Unix system,it is necessary to add module of control and audit based on users. By adding a net module called iplog in Solaris, the goal is fulfilled and therefore the safety of operation system is strengthened. It is shown that the method is effective solution with not very heavy load.

The research of the high initial permeability(6000-20000)ferrite and the frequency dependence of inductance of the ferrite transformer made by high permeability ferrite core are presented. When the driving frequency increases from 100Hz to 300kHz the inductance shows a V-shape L-f curve. The reasons forming such a V-shape curve are discussed in detail.