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In this work, CeO2 nanosheets decorated with Ag2O and AgBr are successfully fabricated via a simple sediment-precipitation method. The as-prepared ternary Ag2O/AgBr–CeO2 composite with double Z-scheme construction was analyzed by various analytical techniques. Ag nanoparticles (NPs) used as the electron medium could reduce the recombination of photoelectrons and holes, thus leading to the improvement of photocatalytic performance of these catalysts. Due to the unique structure and composite advantages, the optimal Ag2O/AgBr–CeO2 photocatalysts exhibit the superior tetracycline (TC) degradation efficiency of 93.23% and favorable stability with near-initial capacity under visible light irradiation. This ternary Z-scheme structure materials will be the well-promising photocatalysts or the purification of antibiotic wastewater.

Urban complex (UC) is the main place of citizens&rsquo, life and work. The construction of an UC often needs to expand the capacity of the power equipment. This paper proposes to use electric vehicles (EVs) in an UC to reduce the power load of the UC during peak periods, so that lower capacity power equipment can be used to reduce the construction costs of the UC and the transformation of electrical facilities. In order to find the relationship between parking and power load in the UC, the UC is decomposed into different functional areas for research. Then, we build a parking information database for clustering and calculation. Divide the load peak into adjustment intervals of equal duration. The EVs parked in the UC for each regulation interval (RI) are grouped according to parking characteristics. Establish an objective function with the minimum load variance during peak hours. The discharge capacity of each group in each RI is obtained and distributed to each EV to realize peak load reduction of UC. Finally, the results of case analysis show that the strategy can reduce the peak load effectively thus save the cost of UC construction.

Two types of artificially fractured cores were prepared in the lab to investigate the effects of micro-fractures on fluid flow in matrix. Using naturally fractured cores and cores without fractures as control group, we analyzed fluid flow behavior in micro-fractures and their effects on fluid flow in matrix itself from the perspectives of threshold pressure gradient and oil displacement efficiency. The experimental results show that, for cores with similar physical properties, the presence of micro-fractures can significantly reduce the real threshold pressure gradient but has negligible effect on pseudo threshold pressure gradient. The matrix system should be classified as parallel or series system based on its relative location to macro-fractures. Pressure gradient in parallel matrix system is usually small and its real threshold pressure gradient is the key factor deciding whether the oil inside can be recovered. On the other hand, pressure gradient in series matrix system is generally large and its pseudo threshold pressure gradient is the key factor deciding whether effective injection-production communication can be established between two wells. Oil displacement efficiency in micro-fractures increases with the increase of micro-fracture aperture and their relationship can be approximated by a quadratic function within a certain range. However, the relationship between oil displacement efficiency in matrix and micro-fracture aperture is not monotone. Pore volumes of micro-fractures, oil displacement efficiency in micro-fractures, and water channeling within micro-fractures are the three main reasons accounting for this phenomenon.

In order to understand the percolation mechanism and development regulation in offshore buried hill fractured reservoir, similarity criteria of physical simulation on water flooding in the fractured reservoirs were established by using similarity and flow theory. Based on the similarity theory and Warren–Root model, a large-scale (1 m × 1 m × 0.5 m) physical similarity model was built. By conducting the similar physical experiments, the behavior and mechanism of fluid flow in the reservoir in different development modes were studied, together with the optimal development program selected. The physical simulation results show that the stereoscopic staggered horizontal well pattern can give full play to the function of oil–water gravitational differentiation and reduce the rising rate of water cut. Flooding mechanisms vary from mode to mode: The sweep efficiency of cold water flooding is higher, whereas the oil displacement efficiency in the fracture and oil recovery in the matrix are lower in the affected area. The hot water flooding can improve the oil–water flow ratio of the mainstream line, reduce the seepage resistance, and improve the oil displacement efficiency in the fracture and the oil recovery of the matrix in the area. However, due to poor heat transfer efficiency, the difference of seepage resistance between the mainstream line and other regional increases results in decreased sweep efficiency. Surfactant flooding reduces oil–water interfacial tension and improves flooding efficiency in the area, yet degenerates oil recovery for the matrix.

To explore the effects of acrylonitrile on T lymphocyte subsets, expression of toll-like receptor 4 and related cytokines in rats.Sixty-four Sprague-Dawley rats were randomly divided into 4 female groups and 4 male groups, and there were 8 rats in each group. Rats in each group were respectively given a single dose of 0, 5, 10 and 20 mg/kg acrylonitrile by gavage, once a day, 5 days a week, for 13 weeks. Blood and spleen T lymphocyte subsets was detected by flow cytometry, the mRNA expression of TLR4, IL-1β and TNF-α was analyzed by real-time quantitative PCR, the protein expression of TLR4 was evaluated by Western blot.Compared with control group, the percentages of blood CD3, CD4 T cells in 20 mg/kg female group and CD4/CD8 ratio in 5, 10 and 20 mg/kg female groups was significantly decreased, CD8 T cells in 20 mg/kg group was significantly increased (P0.05 or P0.01), blood CD3 T cells in 5 mg/kg male group, CD4 T cells and CD4/CD8 ratio in 20 mg/kg male groups were lower than that of control group, CD8 T cells in 20 mg/kg make group was significantly in oreased (P0.05 or P0.01). Spleen CD4, CD8 T lymphocyte percentages and CD4/CD8 ratio in 20 mg/kg female group decreased significantly, CD8 T cells in 20 mg/kg male group was significantly increased (P0.05 or P0.01), spleen CD3, CD4, CD8 T cells in 20 mg/kg male group and CD4/CD8 ratio in 10, 20 mg/kg male groups was also significantly decreased, CD3 T cells in 20 mg/kg and CD8 T cells in 10, 20 mg/kg male groups were significantly increased (P0.05 or P0.01) (TLR4 mRNA was lower expressed in 5, 10 and 20 mg/kg male groups and 10 mg/kg female group (P0.05 or P0.01), and TLR4 protein in 5 mg/kg female group and 20 mg/kg male group was significantly lower than control group (P0.05). The expression level of IL-1β mRNA was significantly decreased in 5, 10 and 20 mg/kg female group and 5, 10 mg/kg male group (P0.05 or P0.01), TNF-α mRNA was lower expressed in 10, 20 mg/kg female groups and 5, 10 mg/kg male groups (P0.01).Acrylonitrile may lead to the changes of CD3, CD4, CD8 T lymphocyte percentages and CD4/CD8 ratio in rat blood and spleen, and also significantly effected the expression level of TLR4 mRNA and protein together with the secretion of IL-1β, TNF-α. This may cause effects on the cellular immune function.