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In order to implement the educational policy in the new era, the paper proposes to reconstruct the teaching content system of basic computer courses. It aims to form an employment ability tree that can benchmark the actual job demands with the guidance of the precise connection between the supply side of talent training and the future demand side of enterprises. Starting from the preset training needs of technical talents on autonomous controllable platforms in China, and faced with the practical problems by the teaching of basic computer courses, the teaching content is reconstructed by the three-step method of “update - feedback - continuous learning”. In the process of concrete implementation, the knowledge map of “point, line and plane” is established and the PDCA cycle model of “plan-do-check-action” is adopted to implement teaching; Bring together, build and share high-quality curriculum resources to improve teaching quality. Highquality course resources are gathered, built and shared to improve the teaching quality.

Hilbert-Huang transform (HHT) is proposed to process the seismic response recordings in an 8-story frame-shear wall base-isolated building. Empirical Mode Decomposition (EMD) method is first applied to identify the time variant characteristics and the data series can be decomposed into several components. Hilbert transform is well-behaved in identifying the frequency components. The first 5 intrinsic mode functions (IMFs) are decomposed with their different frequencies. The analytical function is reconstructed and compared with the original signal. They are extremely consistent in amplitude and phase. Based on the IMFs obtained, frequencies of the original signal are inferred at 5 Hz and 1.6 Hz. The higher frequency is regarded as the vibration excited by surface waves. 1.6 Hz is suggested as the dominant frequency of the building. Analysis indicates that HHT is accurate in extracting the dynamic characteristics of structural systems.

This research aims at researching one high efficiency gas-liquid mixer which can be applied under high gas content condition and can overcome the limited application of sedimentation and rotary oil-gas separator for electric submersible pump. Standard k-ε model and population balance model of the Fluent are applied to simulate the gas-liquid two-phase flow in high efficiency gas-liquid mixer. The internal flow field of impeller opening with different radius and amounts are simulated. The gas holding mechanism of high efficiency gas-liquid mixer is also analyzed. Then according to the gas particle size at the output of impeller, the optimized structure parameter can be obtained. The simulation results show that part of the high pressure liquid at impeller outlet would form cross flow with fluid in normal flowing inside the impeller passage to produce strong shear friction inside the area and burst a large amount of bubbles accumulated in the area. Also, it is proved to be more beneficial for breaking bubble and dealing with gas under the circumstances that gas content at the input is higher than 35%, opening diameter of impeller is Φ4.8mm and opening amount of impeller is 2.

The unconsolidated sandstone heavy oil reservoir is dominated by heterogeneous elastic-plastic reservoir with complex structure. The core demand is large in the study of reservoir lithology and physical properties. Although the high-cost freezing and encapsulation processes are used in the process of coring site and indoor processing, they are still easy to damage in the process of extracting cores. Moreover, the physical parameters of ordinary artificial cores are too different from those of producing cores to obtain accurate lithology and physical parameters. So, replacing the production cores with outcrop cores may become an important method to study the physical parameters of reservoirs. In this paper, the micro-velocity displacement method and saturated heavy oil method are used to study the lithology and physical property parameters of outcrop cores. The results show that compared with those of producing cores, the rock mechanics parameters of outcrop cores after high-pressure heavy oil saturation treatment are basically consistent with those of field cores. Therefore, it can be used to replace the core to study the physical parameters of rocks in special cases.

The aim of this study was to investigate the antidepressant-like effect of red wine phenolic extracts in mouse model exposed to exogenous corticosterone. The results showed that 3-week corticosterone injections caused depression-like behavior in mice, as indicated by the significant decrease in sucrose consumption and increase immobility time in the forced swim test. Red wine phenolic extracts treatment significantly reduced serum corticosterone levels. Moreover, it was found that red wine phenolic extract increased the brain-derived neurotrophic factor protein (BNDF) and Tropomyosin-related kinase B (TrkB) phosphorylation and cAMP-responsive element binding protein (CREB) phosphorylation levels in the hippocampus and prefrontal cortex. However, K252a, an inhibitor of TrkB, completely abolished those antidepressant-like effects. These results suggested that the red wine phenolic extracts produce an antidepressant-like effect in corticosterone-treated mice, at least in part, which is possibly mediated by modulating hypothalamic-pituitary-adrenal (HPA) axis, BDNF, TrkB and CREB phosphorylation levels in the brain region of mice.

The elastic properties and their anisotropies of TixOy (TiO, TiO2, Ti2O3, Ti3O, Ti3O5) were investigated based on first-principles calculations with the generalized gradient approximation (GGA) . The elastic constants and modulus, Poisson’s ratio and universal anisotropic index were obtained. The bonds properties of the five materials were analyzed through Poisson’s ratio and Pugh modulus ratio (G/B). The five titanium oxides are elastically anisotropic. Details of anisotropies were demonstrated in 3D plots.

ABSTRACT : It is perceived that psychological benefits motivate people to seek outdoor experiences in addition to social and biological benefits. Individual needs are usually influenced by one’s socio-demographic situation, past experience, personal attitudes and values among other factors. In this study, a survey was conducted that assessed individual perception and satisfaction of hiking activities (n=146). Enjoying nature and escaping from physical pressure are the most important outcomes perceived by respondents whereas developing leadership skills and family togetherness are least important. Paired t-test determined that a significant proportion of respondents were not satisfied with their needs for enjoyment. Implications of unsatisfactory experience in relation to environmental, personal and other factors are discussed. Five subgroups of participants in hiking activities among the respondents were identified as: 1) low demand on all benefits; 2) inactive youngsters; 3) young working adults with diverse interests; 4) active naturalists; and 5) well-educated working class, enthusiastic hikers. Furthermore, age is not the most significant factor in this analysis, instead, socioeconomic status and trip related factors highly contributed to the classification. The perception of psychological benefits also varied across the subgroups. Their roles, changes and prospects are also discussed based on the research findings. BENEFICIOS PERCEBIDOS DA CAMINHADA COMO UMA ATIVIDADE DE RECREAÇÃO EXTERNA EM HONG KONG RESUMO: Observa-se que aspectos psicológicos motivam as pessoas a buscarem experiências externas em adição aos benefícios sociais e biológicos. Necessidades individuais são geralmente influenciadas pela situação sócio-demográfica de cada um, experiências passadas, atitudes pessoais e valores entre outros fatores. Nesse estudo, uma pesquisa foi realizada avaliando a percepção individual e a satisfação de atividades de caminhada (n=146).