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Innovatively regulating the crystalline-amorphous (c-a) interface of electrode materials is critical for enhancing supercapacitor and electrochemical water splitting performance. In this research, an oxygen defect-rich Fe 3 O 4 @Fe electrode material with a unique and tunable c-a interface was synthesized using prussian blue (PB) as a template. The resulting interface facilitates electron transport and ion diffusion, increases the charge storage active sites, and enhances energy storage capacity. Density functional theory (DFT) simulations demonstrated that oxygen defects can effectively enhance ionic conductivity and facilitate electrochemical water splitting. The optimal Fe 3 O 4 @Fe electrode exhibits remarkable specific capacitance (1526.766 mF cm−2 at 1 mA cm−2) and exceptional oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) performance, with overpotential values of 231 and 359 mV at 10 mA cm−2, respectively. Furthermore, as an overall water splitting electrocatalyst, the optimal Fe 3 O 4 @Fe can reach 10 mA cm−2 at a battery voltage of 1.645 V, demonstrating its tremendous potential as a highly efficient electrocatalyst. The oxygen defect-rich Fe 3 O 4 @Fe electrode materials with unique c-a interface are a kind of highly efficient multifunctional electrode material for supercapacitors and overall water splitting. [Display omitted] • The tunable c-a interface enhances electron transport, ion diffusion, and energy storage capability. • Introduction of oxygen vacancies improves electron transfer kinetics and electrochemically active area. • The unique synergistic interaction between the c-a interface and oxygen vacancies enhances rate performance. [ABSTRACT FROM AUTHOR]

In this paper, a novel semi-supervised fuzzy clustering algorithm, MFM-SFCM, based on a membership fusion mechanism is proposed for Diffusion-weighted imaging (DWI) brain infarction lesion segmentation. The proposed MFM-SFCM algorithm addresses the issue of weakened constraints and insufficient influence of labeled samples on the clustering process that arises in the semi-supervised fuzzy C-means clustering (SFCM) when emphasizing supervised information. By using a new membership fusion mechanism, MFM-SFCM eliminates this issue, greatly improving the accuracy of clustering results and accelerating convergence speed. This allows fuzzy clustering to achieve good results in the segmentation of DWI brain infarction lesions using a small amount of labeled information. The effectiveness of the MFM-SFCM algorithm is demonstrated through experiments conducted on a real-world dataset of DWI brain images. [ABSTRACT FROM AUTHOR]

The property of the surface layer of twice hole expansion Ti1023 alloy was analyzed by TEM, X-ray and roughness tester, and the strengthen mechanism of the bushing hole expansion was discussed. The results indicate that the roughness(Ra1.722→0.349 μm), hardness(Hv32→38) and residual stress distribution of the hole are improved by twice hole expansion techniques,and the fretting wear fatigue(fatigue limits 385→619MPa) of Ti1023 alloy is improved.

The traditional power distribution room lacks intelligent monitoring business functions, which is not conducive to the requirements of intelligent operation and maintenance. This article takes the intelligent IoT terminal(Internet of Things terminal) as the center, carries out the layout design of the distribution room sensor, combines the intelligent collection of the distribution room, and accesses the sensing equipment to build a smart distribution room, meanwhile, this paper designs the intelligent terminal which adopts the edge computing technology to carry out the environment temperature and humidity assessment, equipment partial discharge analysis and assessment, temperature rise assessment and other micro-applications to provide support for the construction of smart distribution room.

After the A oilfield enters the ultra-high water cut period, the production level is high, the comprehensive water cut is high and the production level is high. In recent years, the number of new wells has increased considerably, affecting the increase in production year by year. Faced with these two contradictions, a new scientific and effective drilling gateway management model has been explored to reduce the impact of drilling gateways on production. This will have a very important guarantee for the realization of A oilfield's continued stable production. Based on the research and practice of the drill-off area in Block G, this paper determines the minimum injection stop time before drilling-off corresponding to each set of formations according to the bottom hole pressure change law of the injection-stop well.

MnO2 cathodes have been limited in rechargeable aqueous Zn-ion batteries (AZIBs), primarily due to their poor electrical conductivity and manganese dissolution. To alleviate these challenges, a critical modification is proposed to form novel Mn–O–Ce bonds by compositing MnO2 with CeO2. In this work, the MnO2@CeO2 composite cathode was synthesized via a hydrothermal reaction and annealing treatment. Wherein, the density functional theory (DFT) calculations reveal that the Mn–O–Ce bond improves the cycling stability of MnO2@CeO2 by mitigating the dissolution of the manganese base. Meanwhile, based on the experimental results, incorporating CeO2 with MnO2 not only endows the metal oxides with outstanding electrochemical performance, but also enhances their electron transfer ability by the d-orbital interaction at the Fermi level. Moreover, the detailed ex situ characterization studies, reaction kinetics analyses and DFT calculations further illustrate the performance enhancement mechanism of the MnO2@CeO2 composite cathode, which possesses a special urchin-like morphology and Mn–O–Ce bonds, delivering a myriad of active reaction sites, stable crystal structures, and impressive ion diffusion characteristics for the intercalation of H+/Zn2+. The optimized Zn//MnO2@CeO2 battery achieves an ultrahigh capacity of 355 mA h g−1 at 1 A g−1 and superior durability of 89.68% after 1000 continuous cycles at 1 A g−1. The above results imply that the MnO2@CeO2 composite is a potential cathode for AZIBs, which may shed new light on further exploration in cathode materials. [ABSTRACT FROM AUTHOR]

For water flooded oilfields, the development effect can be given by analyzing the relationship between the recoverable reserves recovery degree and the cumulative water storage rate and water content. Application of recoverable reserves as the basis for evaluating development effects is more comparable than the extent of geological reserves; The cumulative water storage rate is suitable for evaluating the evaluation unit as a whole since its development. Correctly deriving the relationship between the extent of recoverable reserves recovery and the cumulative water storage and water content are the basic conditions for its application.