[en] FePt(50 nm) and [FePt(2,3,5 nm)/AlN(1 nm)]_n films were prepared by RF magnetron sputtering technique, then annealed at 550 deg. C for 30 min. This work investigates the effect of the number of bilayer repetitions (n) and AlN concentration on structures and magnetic properties of various [FePt/AlN]_n multilayers. The highest coercivities of [FePt/AlN]_n multilayers were obtained when n was given as 8. The grain sizes of [FePt/AlN]_n films were increased with increasing n. Introducing the non-magnetic AlN not only hindered the growth of FePt particles, but also reduced the intergrain exchange interactions of the [FePt/AlN]_n films. And the intergrain interactions were decreased with increasing AlN concentration

[en] FePt and FePt/C thin films were prepared by RF magnetron sputtering, then post-annealed in vacuum. The as-deposited films were in disordered state, and the ordered L1₀ structure was obtained by post-annealing at 550 deg. C for 30 min. Superlattice peaks (0 0 1) and (1 1 0) can be found in the X-ray diffraction pattern of FePt and FePt/C films, which indicate that the FCC phase has been partially transformed into L1₀ phase. As the thickness of C layer increased from 1 to 3 nm, the coercivities of the FePt/C multilayer decreased from 6.3 to 1.8 kOe, which indicated that thicker carbon layers in the sample would produce a higher activation energy barrier for the disorder-order transformation. With increasing the C concentration, the grain size and intergrain interactions of FePt/C multilayer films were decreased

[en] In this note, the problem of control for a class of chaotic systems is studied. Only partial information of the systems states is known. First, an adaptive observer is designed to ensure the corresponding error system asymptotically stable. Then, based on the states obtained by the above observer, a nonlinear state feedback controller is constructed for the chaotic system, which, according to the input to state stable (ISS) principal, guarantees the closed-loop chaotic system is asymptotically stable. A numerical example is included to show the effectiveness of the proposed techniques

[en] Using the pressure-time curve that produced from the simulator loaded to the model to check the ability of some detector system against the blast wave. On the basis of numerical simulation and the results of the test, the finite element analysis software-DYTRAN is used to simulate the static load and the dynamic load. Then, several methods are analyzed and draw a conclusion that the numerical simulation of the dynamic load can fully reflect the interaction between the blast wave and the object. (authors)

[en] Frequency analysis of neuronal oscillation is very important for understanding the neural information processing and mechanism of disorder in the brain. This Letter addresses a new method to analyze the neuronal population oscillations with empirical mode decomposition (EMD). Following EMD of neuronal oscillation, a series of intrinsic mode functions (IMFs) are obtained, then Hilbert transform of IMFs can be used to extract the instantaneous time frequency structure of neuronal oscillation. The method is applied to analyze the neuronal oscillation in the hippocampus of epileptic rats in vivo, the results show the neuronal oscillations have different descriptions during the pre-ictal, seizure onset and ictal periods of the epileptic EEG at the different frequency band. This new method is very helpful to provide a view for the temporal structure of neural oscillation

[en] Objective: To observe the preventive and therapeutic effect of Prednisolone in radiation injury of lungs. Methods: 45 male New Zealand white rabbits were randomly divided into three groups with 15 in each; the blank group (a), the irradiation group (b) and the group with irradiation and Prednisolone (c). Group (a) has no other treatment. Group (b) was given injections Sodium Chloride on the first day of irradiation, with 0.1 ml/kg/d for 4 weeks. Group (c) was given intraperitoneal injections of Prednisolone on the first day of irradiation, with 0.4 mg/kg/d for 4 weeks. CT scanning was performs before irradiation and the 1, 3, 5 months after the irradiation. The animals were killed by cutting off the neck after 1, 3, 5 months of radiation. The right lungs were removed to give HE staining and immunohistochemical staining for the histological evaluation. Results: No significant changes were found in group a in CT scanning. The pathological changes in group c is less than serious than those in group b. Group c is less serious than in pathological changes those in group b. Immunohistochemical results; One, three, and five months after irradiation, the number of positive cells were highest in group b, and was significantly higher in group c than in group a. Conclusion: High dose irradiation of the lung of New Zealand rabbit tissue can successfully abtain the established radiation-induced lung injury animal models. Prednisolon can reduce the radiation-induced lung injury in rabbits New Zealand, and has a certain preventive effect. (authors)

[en] In the nuclear spectrometer system, the output signal of detector is often processed by analog shaping filter circuits in order to remove noises and make the waveform meet the needs of the subsequent circuits. Using the analog shaper, the hardware circuits need to be adjusted when changing the parameters, The flexibility and stability are not ideal enough. According Sallen-Key's analog gaussian shaping filter circuits, the unit impulse response of analog gaussian shaping filter is deduced. Then the unit impulse response of digital gaussian shaping filter is deduced according to the sampling theorem. The experimental results with the actual sampling signal show that the digital nuclear pulse has been shaped into a pulse with a pseudo-gaussian and noises have been removed. The results could offer a new approach to the realization of digital gaussian shaping filter for nuclear pulse signal. (authors)

[en] We discovered a new tumor marker MA153 which has been identified as Mu-GlcNAc (Mucin1-N-acetyl-Glucosamine). It can react with monoclonal antibody and a related Aptamer to form the Ma695-Mu-GlcNAc-MA153-A sandwich assay. Taking 1 U/mL as cutoff value, the clinical serum detection results indicated that the tumor specificity of Mu-GlcNAc was 95%, the tumor detection sensitivities were 80%, 74%, 68%, 70%, 75%, 50%, 60%, 55%, 70%, 64%, and 60% for breast cancer, pancreatic cancer, liver cancer, lung cancer, esophagus cancer, mouth cancer, colon cancer, bile duct cancer, ovarian cancer, cervix cancer and uterus cancer, respectively. It is concluded that Mu-GlcNAc is a new multi-tumor tumor marker. (authors)

[en] In nuclear spectroscopy instrument, the output signal of detector is often shaped into the desired waveform in order to remove noises and make the waveform meet the needs of the subsequent analysis. We propose a new digital shaping method. According to the CR-RC analog shaping filter circuits, the unit impulse response of analog shaping filter is deduced. Then the unit impulse response of digital shaping filter is deduced according to the same impulse response. Digital forming waveform can be obtained by calculating the convolution sum of digital nuclear pulse signal and the unit impulse response. The experimental results with simulating and sampling signals show that the algorithm is valid, noise has been removed effectively and nuclear pulse signal has been shaped into pseudo-gaussian signal. (authors)

[en] It is to study the rising of the explosion clouds in the normal atmosphere using Boussinesq model and the Incompressible model, the numerical model is based on the assumption that effects the clouds are gravity and buoyancy. By comparing the evolvement of different density cloud, and gives the conclusion-the Boussinesq model and the Incompressible model is accord when the cloud's density is larger compared to the density of the environment. (authors)