Metal halide perovskites (MHPs) have excellent characteristics and present great potential in a broad range of applications such as solar cells, light‐emitting diodes, photodetectors. However, the light stability devices remains an unresolved issue has received research attention. Under illumination, MHPs exhibit various anomalous phenomena, photoluminescence (PL) enhancement, defect curing, PL blinking, phase segregation. These phenomena are commonly considered intimately correlated with...

Bimetallic metal–organic frameworks (BMOFs) have shown a superior oxygen evolution reaction (OER) performance, attributed to the synergistic effects of dual metal sites. However, significant role these dual-metal synergies in OER is not yet fully understood. In this study, we employed density functional theory systematically investigate performance NiAl- and NiFe-based BMOFs by examining all possible spin states each intermediate across diverse external potentials pH environments. We found...

Molybdenum disulfide (MoS2) has been universally demonstrated to be an effective electrocatalytic catalyst for hydrogen evolution reaction (HER). However, the low conductivity, few active sites and poor stability of MoS2-based electrocatalysts hinder its performance in a wide pH range. The introduction other metal phases carbon materials can create rich interfaces defects enhance activity catalyst. Herein, new defect-rich heterogeneous ternary nanocomposite consisted MoS2, NiS reduced...

Abstract Metal halide perovskite‐based devices can exhibit exceptional optoelectronic performance at relatively high defect densities, a phenomenon commonly referred to as tolerance, which is one of the most important features metal perovskites (MHPs). Defect tolerance previously thought be static property, determined solely by composition and manufacturing process. However, recent studies have shown that MHPs dynamic vary over time. For example, power conversion efficiency MHPs‐based solar...

Defect tolerance, which plays a crucial role in the outstanding photoelectric performance of hybrid organic–inorganic perovskites (HOIPs), is dynamically responsive to illumination. Continuous illumination can induce local structural reorganization leading dynamic PL enhancement.

How to inhibit the formation of point defects in preparation process hybrid perovskite for improving stability and photovoltaic characteristics has been a hot research issue recent years. Herein, molecular engineering polyvinylpyrrolidone (PVP) is focused as Lewis base an additive improve interface matching solar cells. Based on binding strategy, film crystallinity, bond binding, interfacial transport, water resistance can be effectively regulated, resulting preferred characteristics....

The critical aspects of risk management include hazard identification, assessment, and control. Timely is to company decision‐making, but the process acquiring knowledge often time‐consuming labor‐intensive. Knowledge graph question answering (KGQA) provides an effective solution by delivering through accurate reasoning. However, existing KGQA methods do not cover are difficult retrieve quickly accurately from large graphs. This study describes a complex method for intelligently generating...

Inorganic fullerene-like tungsten disulfide particles have been proved to good anti-friction and anti-wear properties as lubricating materials. As far we know, however, when it is used a lubricant additive, its behavior action mechanism in the friction process are rarely studied. Herein, IF–WS2 were synthesized by Chemical Vapor Deposition (CVD) method. The effect of particle concentrations PAO6 oil on tribological behaviors was investigated with four-ball wear machine at both 75 100 °C....

The output as well carbon dioxide emissions of tertiary industry have increased continuously in Beijing. Therefore, the has become a new field that needs to be explored for energy saving and emission reduction. This paper calculates direct indirect Beijing from 2005 2012 using input-output analysis method. results indicate both latter grew more quickly than former. growth was decomposed, which showed four factors influence industry, including changes industrial scale, structure, consumption...

This study reviews the metal corrosion problem regarding carbon capture, utilization, and storage (CCUS) technology aims to deepen understanding research on this thus deal with severe material failures in transportation, systems.Based novel environments, uniqueness of behaviors, limited cognition, relative lack protective measures CCUS systems, analyzes possible types its major influencing factors, explores challenges it brings, draws following conclusions.For CO 2 organic amine capture...

In view of the problem that artillery tube life is difficult to accurately forecast under random using condition, through analysis heat transfer process inner wall body, introducing internal strengthening hypothesis, calculation method highest temperature obtained and its variation regularity ablation wear maximum studied.At same time, comes up when shooting continuously circumstance uncertain gunpowder ,uncertain time interval propellant charge.

The super-heated temperature system is a typical element with high-order inertia process in thermal power plant. Especially case of load changing, the parameters show obvious time-varying, uncertain and nonlinear property, which markedly reduces quality traditional PID cascade control. MFAC an advanced control strategy exellent self-turn robustness. However, drawback are low response speed couldn't overcome extraneous disturbance. MFA human-simulated intelligent control(HSIC) therefore being...

Co-simulation technology has been widely used in the design and research of complex mechanical systems.The co-simulation based on ADAMS MATLAB is summarized, related software introduced.Taking eccentric connecting rod as an example, output torque input parameter model, control effect under three kinds outputs compared.The results show that can be effective method for simulation analysis dynamic systems..

The repair quality of ordnance equipment affects directly fighting capacity equipment. Therefore, it is necessary to study control In light modern mathematical statistics principles, we do analysis and systematic research on the data obtained in a factory so as identify improvement measures, thus promoting standard

Breech mechanism is the key and important device to improve reliability maintenance for large caliber guns. It's major fault mode grain abrasion caused by dry sliding friction. There are no feasible practical technologies simulate predict failure life of components breech mechanism. A new simulation prediction method firstly put forward in this paper. Based on Pro/E ADAMS, virtual prototype semiautomatic vertical sliding-wedge type established. To validate its precision affectivity,...

In the process of making switch from exam-oriented education to quality education, it is evident that many workers in field actually want implement education; however, because there not a complete set management models place for implementing they feel compelled adapt and promote even though against their wishes. It appears, therefore, if we are truly on all fronts, addition bringing about change general philosophy establishing macro-environment conducive will need deal with another major...