Abstract The modified Gurson-Tvergaard-Needleman (GTN) model is employed to predict the ductile fracture of 7A62 high-strength aluminum alloy under a wide range stress states. Mechanical tests were conducted on specimens with different states within −0.33 1.35 triaxiality, including tension, notched compression, and shear. results indicate that at high triaxialities (0.8 ∼ 1.35), mechanism intergranular fracture. Under moderate (0.33 0.8), involves combination fracture, void growth, shear At...

Analytical solutions to the (3+1)-dimensional nonlinear Schrödinger equation (NLSE) are obtained. It is first time our knowledge that analytical three-dimensional NLSE with varying coefficients have been derived. The generalization of one-dimensional NLSE. properties amplitudes and phases investigated.

This research is motivated by the widespread use of desktop environments in lab and recent trend conducting real-world eye-tracking experiments to investigate pedestrian navigation. Despite existing significant differences between real world environments, how pedestrians' visual behavior differs from that still not well understood. Here, we report a study recorded eye movements for total 82 participants while they were performing five common navigation tasks an unfamiliar urban environment...

Organic peroxides are a kind of very hazardous substance because they capable self-decomposition when being heated or exposed to the sunlight. In present paper, thermal hazard tert-butyl hydroperoxide (TBHP) has been investigated by using accelerating rate calorimeter (ARC). On basis experimental results, kinetic parameters exothermic reaction TBHP under adiabatic condition is estimated, and parameters, such as initial decomposition temperature, temperature rise, maximum rise molar heat real...

The principle and technique details of recoil ion momentum imaging are discussed summarized. spectroscopy built at the Institute Modern Physics (Lanzhou) is presented. first results obtained setup analyzed. For 30 keV He2+ on He collision, it found that capture single electron occurs dominantly into excited states, related scattering angle show ground state large impact parameters, while states small parameters. manifest collision dynamics for sub-femto-second process can be studied through...

Chemically functionalized graphene (CFG) is proposed as a novel nanoscale optical heater by uniformly dispersing it in poly(dimethylsiloxane) (PDMS) matrix. And subsequently, simple, fast, and localized heating method on microfluidic chips demonstrated. CFG prepared through simultaneous modification reduction of oxide with dodecylamine solvothermal route. It well dispersed PDMS suspension to form uniform CFG/PDMS composite due the presence long‐dodecyl chain. The obtained composites are...

Abstract To improve the production yield rate, reliability is one of important indicators electronic packaging products. In past research, however, influence fabrication process was rarely taken into consideration. this thesis, mold flow analysis software Moldex3D used to develop a series procedure for IC package The effects many factors, including process, structure, and materials were being account. Especially epoxy molding compound, namely EMC, studied on its properties during post-mold...

A series of novel trisulfonated poly(phthalazinone ether phosphine oxide)s (tsPPEPO) were synthesized using direct polycondensation. The properties the achieved membranes including water uptake, swelling ratio, oxidative resistance, conductivity, and microstructure studied in detail. results demonstrated that tsPPEPO with a high sulfonation degree showed an extremely low ratio outstanding oxidation stability without sacrificing proton which is ascribed to strong intermolecular interaction...

Laser-induced breakdown spectroscopy (LIBS) as a powerful analytical technique is applied to analyze trace-elements in fresh plant samples. We investigate the LIBS spectra of holly leaves and observe more than 430 lines emitted from 25 elements molecules region 230–438 nm. The influence laser wavelength on semi-quantitative analysis trace-element contents samples studied. results show that UV has lower relative standard deviations better repeatability for This work may be helpful improving...

Change detection using high-resolution remote sensing images provides crucial information for geospatial monitoring, which is of great importance as urbanization continues.However, current deep learning models change tasks are mostly based on convolutional neural networks (CNNs), from it difficult to extract global owing the locality convolution operations.In this paper, we propose a model, Siam-Swin-UNet (SSUNet), detection.SSUNet designed following classic UNet-like encoder-decoder...

The shortage and demand for the communication of multi-robot system are concisely analyzed design on TCP/IP thought program proposed. Based which is made up MOTOMAN-HP3 serial robot NPT800 parallel robot, ontology communication, motion control between two robots introduced respectively. In end, mutual can be accomplished by position status information transported with programming win socket.

Bohm criterion in a magnetized plasma sheath is investigated with fluid model. The upper and lower limits for the different states of applied magnetic field are studied. results from numerical simulation reveal that affects significantly ion Mach number. variation number incident angle ions also presented.

Two-dimensional transition-metal chalcogenides (TMCs) have great potential as high-efficiency hydrogen evolution reaction (HER) catalysts to replace the traditional noble-metal catalysts. Although many strategies been developed improve efficiency of HER TMCs, how accurately and appropriately regulate catalyst increase catalytic activity remains a challenge. Here, this work reports strategy for regulating defects Sb2Te3 by ion irradiation technology studies effect dose on material properties...

The structure of plasma sheath in an oblique magnetic field is numerically investigated by using fluid dynamics method. simulation results reveal that the has significant effects on sheath. Especially, ion density distribution near edge changes obviously. Two cases incidence are considered here. action states ions more complicated when enter with angle. Under suitable conditions, Lorentz force induces fluctuations density. Ions could gather some regions.

ABSTRACT A series of novel phenolphthalein‐containing sulfonated poly(arylene ether phosphine oxide)s (sPAEPP) with various sulfonation degrees were synthesized by direct polycondensation. The structure sPAEPP was confirmed 1 H‐NMR, 13 C‐NMR, and IR spectroscopy. high‐molecular weight these polymers determined gel permeation chromatography (GPC). transparent, tough, flexible membranes could be achieved solution casting. macroscopic properties microstructure the obtained investigated in...

The sheath criterion for an electronegative plasma composed of hot electrons, negative ions and cold positive in oblique magnetic field is investigated. We discuss the effects external on criterion. find that ion Mach number relatively low value because Coulomb attraction between ions. Also depends magnitude angle as well initial velocity flow.

A generalized finite element formulation is proposed for the study of spin-dependent ballistic transport electron through two-dimensional quantum structures with Rashba spin-orbit interactions (SOI). The transmission coefficient, conductance, total and local polarization are numerically calculated discussed as geometric sizes, incident energy changed in T-shaped devices. Some interesting features found proper parameter regime. has an enhancement coefficient becomes stronger. valley rigid...

Aiming at being carried on various underwater vehicles for the detection of plankton, a miniaturized in-situ digital inline holographic system named OUC-HoloCam²⁰⁰ is designed and developed. Although structure simple compact, performance still excellent. Tests have been out result shows that optical resolution 8.77 μm, depth field up to 30 cm, view 8.44×6.75 mm² , which means theoretically with each exposure, about 300 mL seawater can be investigated. deployed...

State-selective single electron capture cross sections are measured by recoil ion momentum spectroscopy technique for He2+ on He at 30 keV incident energy. The into ground and excited states obtained compared to classical model calculations as well the quantum mechanical calculations. experimental results in good agreement with results.

The sheath criterion for a collisional electronegative plasma in an applied magnetic field is investigated. It assumed that the system consists of hot electrons, negative ions and cold positive ions. effect on discussed. results reveal has effects both upper lower limits, which cause range ion Mach number to increase. In addition, numerical calculations are carried out demonstrate characteristics sheath.