In this study, composite plates of 6061/TA1 were successfully manufactured using additive friction stir deposition (AFSD). The impact preheating temperatures (room temperature, 100 °C, 200 °C) on the interfacial microstructure and interface mechanical properties at various zones was studied. results showed that as temperature increased or when deposit zone shifted from boundary to center, diffusion width Al Ti increased, accompanied by an increase in bonding shear strength. Moreover, sample...

The demand for fast optical image acquisition without movable elements (e.g., self-driving car technology) can be met using bioinspired 3D compound eyes.3D laser processing strategies enable designable structuring but suffer from low fabrication efficiency, which significantly limits their applications in producing complex devices.Herein, we demonstrate a versatile yet simple wet-etching-assisted holographic method the development of eyes.Artificial μeyes readily fabricated by programming...

An efficient photoactive charge transfer complex protocol for the synthesis of phenanthridine derivatives by reaction 2-isocyanobiaryls with α-chloro esters is established.

Due to traditional methods' inability synthesize N-alkylation compounds greenly and efficiently, as well unclear catalytic mechanisms. This study employed seafood waste chitin raw materials prepare porous...

In this paper we investigate a space-time finite element approximation of parabolic optimal control problems. The first order optimality conditions are transformed into an elliptic equation fourth in space and second time involving only the state or adjoint domain. We derive priori posteriori error estimates for discretization state. Furthermore, also propose mixed scheme to approximate equations, Numerical examples presented illustrate our theoretical findings performance approach.

Brucellosis is a chronic zoonotic disease, and Ningxia one of the high prevalence regions in China. To mitigate spread brucellosis, government has implemented comprehensive prevention control plan (2022-2024). It meaningful to quantitatively evaluate accessibility this strategy.Based on transmission characteristics brucellosis Ningxia, we propose dynamical model sheep-human-environment, which coupling with stage structure sheep indirect environmental transmission. We first calculate basic...

Five kinds of organic quantum well structured light-emitting devices are fabricated, and their electrical characteristics studied. The effects period number barrier thickness on device performance analyzed. Experimental results show that appropriate cycle have higher brightness current efficiency than the traditional three-layer devices. That is because limitation effect structure electrons holes,and this kind could improve composite probability excitons in layer,thereby increasing OLED....

The viscosity of 30%CaO-30%SiO2-15%Al2O3-5%MgO-10%Na2O-10%CaF2-xCe2O3 (mass%, x = 0, 5, 10, 15) were measured by the rotating column method, and then Tbr (break temperature) mold flux analyzed based on results. Meanwhile, structural characteristics investigated using Raman spectroscopy XRD (X-ray diffraction). results show that Ce2O3 predominantly destroys silicate network structure at high temperature, reduces polymerization degree flux, simplifies high-temperature friction resistance...

There are currently many studies on data-driven optimization scheduling, but only a few have combined “closed-loop optimization” with “performance-driven”. Therefore, this research proposed PSO-SVM-based (particle swarm optimized support vector machine) scheduling method that reconciles the composite dispatching rules (CDR), performance-driving ideology, and feedback mechanism ideology. Firstly, coalesce flexible equipment maintenance, multiple process constraints, dynamic dispatching....

The production of methylthio radical typically relies on gaseous methanethiol or dimethyl disulfide. Herein, we present a new and straightforward method for the photogeneration from methylthiophosphonium salt, enabling synthesis methylthiophenanthridines via charge transfer complex strategy. In this approach, salt acts as electron acceptor, while 2‐isocyanobiaryls serve donors. This strategy is distinguished by its simplicity in both conditions operation, can be extended generation various...

The boom of the Internet Things has revolutionized people's lives, but it also resulted in massive resource consumption and environmental pollution. Recently, Green IoT (GIoT) become a worldwide consensus to address this issue. In paper, we propose EEWScatter, an energy-efficient WiFi backscatter communication system pursue goal GIoT. Unlike previous systems that solely focus on tags, our approach offers comprehensive system-wide view energy conservation. Specifically, reuse ambient signals...

Reverberation time and language definition is an important parameter to weight the auditory environment in classrooms. By analyzing indoor of classrooms, a new method was put forward which acoustics parameters educed by using neural network. Comparing with other methods, built connection between character reverberation classroom gained better deducing accuracy. It provided thought about research inner-classroom audio design acoustics.

Modular robots are gaining increasing attention in space services. The docking mechanism plays a critical role performing self-healing and self-reconfiguration of modular robots. It is beneficial for the to operate with high efficiency, homogeneity misalignment tolerances. To meet these requirements, this paper presents novel genderless mechanism. construction designed features passive locking single-sided electromagnetic unlocking. demonstrate advantages locking, working processes axial...

In the research of thruster fault diagnosis method using Support Vector Domain Description (SVDD) for Autonomous Underwater Vehicle (AUV), it is difficult to get optimal kernel function parameters SVDD classification model by traditional parameter optimization method. To solve these problems, an improved pattern investigated. It improves performance describing distribution forms and rules mapping data in a high dimensional feature space optimizing based on non-Gaussian measurement maximum...