Highlights: • Provide the first set of comprehensive experimental data for wave-induced pore pressure around a partially backfilled pipeline in a trench layer. • Systematically investigate the effect of wave characteristics on transient pore-water response in the trench layer near the partial-buried pipeline. • Integrally examine the effect of trench depth and backfill thickness on oscillatory porewater pressure around the partial-embedded pipeline.

Background: The limitations associated with antipsychotics in early-onset schizophrenia patients have stimulated more interest in psychological interventions in this population. Nevertheless, the isolated psychosocial interventions are unrealistic in a treatment success covering the complex array of symptoms, and the psychosocial interventions could be an adjunct treatment to the pharmacological treatment. It is necessary to find the benefits of psychological interventions with limited and targeted use of antipsychotics. Social cognition and interaction training (SCIT) was a program for social cognitive rehabilitation in adult schizophrenia. However, it is unclear how generalizable this is to early-onset patients. Methods: The current study tested this hypothesis that combined SCIT and paliperidone was superior to paliperidone alone in treating early-onset schizophrenia patients on cognitive, functional, and symptom outcomes. Two hundred eight inpatients with schizophrenia aged 13 to 17 years old participated in a 24-week work intervention program. Patients completed a battery of measures administered at a pre-SCIT intervention baseline, 4, 8, 12, and 24 weeks post-SCIT, respectively. Results: SCIT had significant added benefits above paliperidone for the speed of processing, attention/vigilance, and social cognition of the Chinese version of MATRICS consensus cognitive battery (MCCB) domains (p<0.05). The following logistic regression analysis on the exploration of the influential factors also confirmed the effects of SCIT. However, combined SCIT and paliperidone intervention had a null impact on social functioning and symptomatology. Conclusions: The present study provides the first evidence that combined SCIT and paliperidone intervention has the potential to improve cognitive functions for the early-onset schizophrenia patients. The findings in the current study are suggestive of the extreme importance of SCIT as an adjunctive treatment in early-onset schizophrenia patients.

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The research for gas–liquid two-phase flow is very important for flow assurance and flow stability of chemical transportation. In terms of transportation pipelines, the curved section is a very significant part. Therefore, the present work proposes a transient slug flow model for the curve pipes, and we conducted some experiments to validate it. This slug flow model is a four-equation model that contains mass and momentum balances with the closure relations. The normal two-dimensional rectangular coordinate system is simplified to the one-dimensional polar coordinate system, which will make the simulation faster and easier. The common flow parameters, such as the pressure profile along the pipeline, real-time pressure, and liquid holdup, are calculated in this model. Three groups of experiments with three different pipe curvatures were carried out to validate this model; the experiments were under the same conditions as those of the model calculations. The transient pressure and liquid holdup were measured at the middle of the curved pipe. The experimental data are compared to the calculated results, and there are error analyses of pressure and liquid holdup that are made to review the model’s performance. The analyses show that a large proportion of the pressure errors is within 10%, and most of the liquid holdup errors are within 0.1. The comparisons between the model and experiments show good agreement.

In this paper, a novel interpolation algorithm for high speed machining is presented, which integrates S-curve acceleration/deceleration method in look-ahead function. A time division based speed planning method is used to implement discrete S-curve acceleration/deceleration method. The implementation of the proposed algorithm is given out. The proposed algorithm improves the processing efficiency and avoids the shock of machine tools caused by frequent acceleration and deceleration. The experiment shows that the proposed algorithm satisfies the requirements of interpolation accuracy and machining efficiency in high speed machining.

After large-scale and long-term waterflooding, reservoir physical properties such as the pore throat structure and rock wettability may change. In this paper, the relative permeability curves under different water injection volumes through core-flood experiments were used to characterize the comprehensive changes of various reservoir physical properties at high water-cut stage. The novel concept of "water cross-surface flux" was proposed to characterize the cumulative flushing effect on the reservoir by injected water, and a novel method for inverted five-spot reservoir simulation at high water-cut stage based on time-varying relative permeability curves was established. From the relative permeability curves measured through two cores from the X oilfield under different water injection volumes (100, 500, 1000, 1500, and 2000 PV), it is found that with the increase of injected water volume, the two-phase co-flow zone becomes wider, the water permeability under residual oil saturation increases, and the residual oil saturation decreases. A waterflooding core model was established, simulated, and verified by the method proposed in this paper. It is found that using time-varying permeability curves for simulation, the highest oil recovery factor (61.58%) can be obtained with injected water volume up to 2000 PV, and the purpose of improved oil recovery (IOR) can be achieved by high water injection volume, but the increment is only approximately 10%. Besides, a waterflooding model of an inverted five-spot reservoir unit based on the X oilfield was also established, simulated, and analyzed. Simulation results have shown that no matter which set of core permeability curves measured from 100 to 2000 PV is directly used alone, the oil recovery factor will be simulated inaccurately. The findings of this study can help in better understanding the quantitative description of the oil recovery changes with time-varying reservoir physical properties in high water-cut reservoirs during waterflooding.

A novel series input multiple outputs modular auxiliary power supply and its control strategy are proposed and investigated in this study. It adopts series input multiple outputs connection mode, where multiple auxiliary power modules are connected in series at the input side while they are independent at the output side. This auxiliary power supply can provide power for the control and drive circuits of the power modules in the input series modular system. To ensure input voltage sharing (IVS) between each module, a novel control strategy called master-slave peak current mode control strategy is proposed. With this control strategy, not only IVS can be achieved without any external central controller, but also the output controller and the IVS controller can be decoupled from each other when the system is running in discontinuous conduction mode. The stability of the control strategy is analysed, the effectiveness of the system is discussed and the design process of the controller is given. A two-module auxiliary power supply system prototype is fabricated and tested. The experimental results verify the effectiveness of the proposed system scheme and control strategy.

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