Anatase-dominated anatase/rutile mixed-phase TiO₂ nanotubes were prepared by decorating TiO₂ on the hydrothermally synthesized TiO₂-derived nanotubes via liquid phase deposition and subsequent ...annealing. The morphology and structure of as-prepared TiO₂ nanotubes were characterized by transmission electron microscopy, X-ray diffraction, Raman spectra, and UV-Vis diffuse reflectance spectra. The separation efficiency of photogenerated carriers was investigated by photoluminescence spectra. The photocatalytic activity was evaluated by methyl orange decomposition under UV illumination. The results indicated that the mixed-phase TiO₂ nanotubes consisting of anatase and rutile (82/18 w/w) were successfully fabricated. Due to the synergistic effect of mixed anatase and rutile phases, the anatase-dominated anatase/rutile mixed-phase TiO₂ nanotubes exhibited superior photocatalytic activity. The apparent rate constant k of the photocatalytic reaction for the TiO₂ nanotubes with and without decoration was 0.0528 and 0.0126, respectively. Graphical Abstract Anatase/rutile mixed-phase TiO₂ nanotubes (MNTs) were prepared by hydrothermal synthesis and subsequent annealing. And anatase-dominated anatase/rutile mixed-phase TiO₂ nanotubes (ANTs) with superior photocatalytic performance were fabricated by decorating TiO₂ on hydrothermally synthesized TiO₂-derived nanotubes via liquid phase deposition and subsequent annealing. graphic removed
The fault rate in equipment increases significantly along with the service life of the equipment, especially for multiple fault. Typically, the Bayesian theory is used to construct the model of ...faults, and intelligent algorithm is used to solve the model. Lagrangian relaxation algorithm can be adopted to solve multiple fault diagnosis models. But the mathematical derivation process may be complex, while the updating method for Lagrangian multiplier is limited and it may fall into a local optimal solution. The particle swarm optimization (PSO) algorithm is a global search algorithm. In this paper, an improved Lagrange-particle swarm optimization algorithm is proposed. The updating of the Lagrangian multipliers is with the PSO algorithm for global searching. The difference between the upper and lower bounds is proposed to construct the fitness function of PSO. The multiple fault diagnosis model can be solved by the improved Lagrange-particle swarm optimization algorithm. Experiment on a case study of sensor data-based multiple fault diagnosis verifies the effectiveness and robustness of the proposed method.
The excited state dynamics of phenol in water have been investigated using transient absorption spectroscopy. Solvated electrons and vibrationally cold phenoxyl radicals are observed upon 200 and 267 ...nm excitation, but with formation time scales that differ by more than 4 orders of magnitude. The impact of these findings is assessed in terms of the relative importance of autoionization versus proton-coupled electron transfer mechanisms in this computationally tractable model system.
The excavation and support of deep chamber has always been a difficult problem to be solved urgently. Through a case study on the 980 m deep chamber group at Xinhe coal mine of China, the present ...research conducts theoretical analysis on the excavation-induced failure mechanism associated with the neighboring chambers. Moreover, a suite of construction workflows are optimized based on Flac3D numerical simulation. The optimal construction workflow BA
2
A
3
A
1
A
4
A
5
is determined by minimizing the damage volume V
P
of the plastic region subsequently. The main chamber and niche of the pump house are supported by combined support, and the non-used support is adopted in the early and late stages of the construction of the pump house. The FLAC3D numerical simulator is adopted here to model the support scheme. Results show that the chamber deformation is effectively controlled at the top, bottom, and both sides. Results from field monitoring indicate that the overall supporting effect to the roadway is decent. In order to design the mining sequence of chamber group, FLAC3D numerical simulation can be used to optimize the scheme, and the combined support method adopted by chamber group is reasonable and feasible, which can effectively control surrounding rock, and has good application value.
Diverting agents that could plug a targeted location and fill different shapes of fractures have attracted an increasing attention in the field of fracturing. In this study, a series of novel ...diverting agents were prepared by mixing aldehyde sodium alginate (ASA) and amino gelatin (AG) through a Schiff base reaction to form a primary network, polylactic acid (PLA) fibers were added to produce a 3D network, and Ca2+ was mixed in as an ionic cross‐linking agent to strengthen the cross‐linking points. It was found that gelation time, swelling behavior, and mechanical performance could be controlled by varying the content of aldehyde groups and amino groups. Gelation time could be controlled in 1‐10 minutes. Plugging behavior and degradation tests demonstrated that the hydrogel could suit fractures with various shapes and plug effectively under high temperatures and pressures, and it could eventually become acidic fluid to help clean the wellbore. This novel ASA/AG/PLA hydrogel constitutes a promising environmentally friendly diverting agent in the application of diversion fracturing.
A diverting agent is developed that could suit fractures with various shapes and plug effectively under high temperatures and pressures, and could eventually become acidic fluid to help clean the wellbore. This novel hydrogel constitutes a promising environmentally friendly diverting agent in the application of diversion fracturing.
According to the criteria described in previous studies,8,9 we settled the threshold of TSI <.2 and identified 23 HIRIP essential for immune regulation (Figure S1A). SEE PDF To further explore the ...biological mechanisms underlying the HIRIPS, we proposed a novel pipeline to perform functional enrichment, which maximized information retention and comprehensively considered gene ordering across all cohorts (Supplementary Materials). The over-representing analysis revealed patients with high HIRIPS exhibited predominant enrichment in pathways related to malignant progressions, such as cell cycle and p53 signaling (Figure 3A and Figure S2).
As the main body of resource aggregation, Virtual Power Plant (VPP) not only needs to participate in the external energy market but also needs to optimize the management of internal resources. ...Different from other energy storage, hydrogen energy storage systems can participate in the hydrogen market in addition to assuming the backup supplementary function of electric energy. For the Virtual Power Plant Operator (VPPO), it needs to optimize the scheduling of internal resources and formulate bidding strategies for the electric-hydrogen market based on external market information. In this study, a two-stage model is constructed considering the internal and external interaction mechanism. The first stage model optimizes the operation of renewable energy, flexible load, extraction storage, and hydrogen energy storage system based on the complementary characteristics of internal resources; the second stage model optimizes the bidding strategy to maximize the total revenue of the electricity energy market, auxiliary service market and hydrogen market. Finally, a typical scenario is constructed and the rationality and effectiveness of the strategy are verified. The results show that the hybrid VPP with hydrogen storage has better economic benefits, resource benefits and reliability.
At present, the world is committed to the development of environmentally friendly, sustainable and industrial safety. The effective treatment of industrial solid waste can be applied in the field of ...industrial safety. It is one of the ways to apply industrial solid waste to industrial safety to modify industrial solid waste and combine active powder to prepare industrial solid waste-based composite powder explosion inhibitors and apply it to underground coal dust explosion. This paper introduces the modification and preparation methods of industrial solid waste, and analyzes the good explosion suppression effect and good economic benefit of industrial solid waste-based composite powder explosion inhibitors on coal dust explosion. In this paper, four kinds of industrial solid wastes (red mud, slag, fly ash and sludge) were modified, and the modified solid waste materials with good carrier characteristics were obtained. Combined with a variety of active powders (NaHCO3, KH2PO4 and Al(OH)3), the industrial solid waste-based composite powder explosion inhibitors were obtained by solvent-crystallization (WCSC) and dry coating by ball milling (DCBM). Those kinds of explosion inhibitors can suppress the explosion of pulverized coal in 40–50% of cases. Compared with the powder explosion inhibitor commonly used in industry, it has a lower production cost and better explosion suppression effect. Those kinds of explosion inhibitors have a good industrial application prospect.
Leiomyomatosis peritonealis disseminata (LPD) is a non-metastatic, homologous, multicentric benign disorder characterized by small leiomyomas scattered over the peritoneum and omentum. It is a rare ...and benign disease with invasive potential. LPD mainly attacks women of childbearing age but has also been reported in post-menopausal women, men, and young children. Non-specific clinical and imaging findings of LPD lead to difficult diagnoses and treatment.
This study reports the case of a patient with recurrent LPD with endometriosis after multiple myomectomies and hysterectomy, who presented recurrent abdominal pain with progressive exacerbation. Imaging examinations showed irregular shadows in the pelvic cavity and multiple nodular changes in the peritoneum, which were considered malignant lesions. A solid mass sized 10 cm × 9 cm × 10 cm in the inferior pelvis and nodules scattered over the surface of pelvic and abdominal organs and the peritoneum were detected during the surgery. The patient was treated with cytoreductive surgery (CRS), peritonectomy, ovarian ablation, and hyperthermic intraperitoneal chemotherapy (HIPEC). The surgery was challenging, and the intraoperative bleeding reached 900 ml. However, the patient recovered well and achieved a tumor-free survival of 13 months.
It was concluded that a combination of CRS, ovarectomy, and HIPEC might be one of the therapeutic strategies for recurrent LPD.
PDF
