Results 21 to 30 of about 27,351 (298)

Visualizing femtosecond dynamics with ultrafast electron probes through terahertz compression and time-stamping

, 2021
Visualizing ultrafast dynamics at the atomic scale requires time-resolved pump-probe characterization with femtosecond temporal resolution. For single-shot ultrafast electron diffraction (UED) with fully relativistic electron bunch probes, existing ...
Annika E. Gabriel (14386596), Duan Luo (9016076), Fuaho Ji (14386599), Xijie Wang (1511836), Stephen Weathersby (1511824), Mohamed A. K. Othman (14386590), Xiaozhe Shen (1511833), Emma C. Snively (14386593), Michael E. Kozina (4593634), Samantha Lewis (8616351)   +9 more
core   +1 more source

Multi-Objective Optimization Design of Constant Stress Accelerated Degradation Test Using Inverse Gaussian Process

IEEE Access, 2019
A multi-objective optimization method for constant stress accelerated degradation test is proposed in order to solve the problem of different or even conflicted test configuration under different optimization objectives.
Zhenyu Wu, Xiaoping Liu, Bin Guo, Dejun Cui, Lijie Zhang   +4 more
doaj   +1 more source

Numerical Simulation of Stamping-Spinning Hybrid Process for Aluminum Alloy Hemispherical Shells

Shanghai Jiaotong Daxue xuebao, 2023
Aimed at the poor accuracy in traditional deep drawing of aerospace aluminum alloy hemispherical shells, and by introducing metal spinning, a stamping-spinning hybrid process strategy for aluminum alloy hemispherical shells is proposed, which can achieve
YU Xiaopeng, WANG Zimin, YU Zhongqi, LUO Yimin, YU Li
doaj   +1 more source

Study on structural modeling and kinematics analysis of a novel wheel-legged rescue robot

International Journal of Advanced Robotic Systems, 2018
This article presents a novel rescue robot with three-degrees of freedom leg mechanism based on the serial–parallel and wheel-legged mechanisms, which consists of two U niversal joint- P rismatic joint- S pherical joint plus one U niversal joint and R ...
Jianye Niu, Hongbo Wang, Hongmin Shi, Nicolae Pop, Dong Li, Shanshan Li, Shaozhen Wu   +6 more
doaj   +1 more source

Comparison of Linear Regression and Artificial Neural Network Models for the Dimensional Control of the Welded Stamped Steel Arms

Machines, 2023
The production of parts by pressing and subsequent welding is commonly used in the automotive industry. The disadvantage of this method of production is that inaccuracies arising during pressing significantly affect the final dimension of the part ...
Milan Kadnár, Peter Káčer, Marta Harničárová, Jan Valíček, František Tóth, Marián Bujna, Milena Kušnerová, Rastislav Mikuš, Marian Boržan   +8 more
doaj   +1 more source

Fundamental Investigations to Evaluate the Influence of Notching Processes on a Subsequent Cyclic Bending Process for the Production of Wire Cores

Journal of Manufacturing and Materials Processing, 2023
The production of wire cores by notch rolling and cyclic bending promises an ecologically and economically efficient manufacturing option for steel fibers. The paper at hand evaluates the influence of wire strips on cyclic bending by applying rolled wire
Alina Biallas, Sophia Ohmayer, Marion Merklein   +2 more
doaj   +1 more source

Mechanism Optimization Design of Multi-bar Light-load Stamping Press

Jixie chuandong, 2022
In order to give full play to the mechanical properties of stamping machine，a multi-bar mechanism is used to replace a manual production to solve a series of problems when stamping sponge blank.
Yang Xu, Yuanchao Deng, Zhiqiang Xu
doaj  

Multi-Pass Stamping Forming a Concave Ring

Applied Sciences, 2020
To improve the production quality and efficiency of the concave ring, a multi-pass stamping technology is used to replace the spinning technology to form the concave ring.
Song Zhang, Xuedao Shu, Jianan Shi, Zixuan Li   +3 more
doaj   +1 more source

Base lubricants for green stamping: The effects of their structure and viscosity on tribological performance

Friction, 2023
The requirements for green and sustainable manufacturing mean that stamping lubricants must be continuously re-evaluated and re-designed. In this investigation, the tribological performance of four base oils with different chemical structures (paraffinic
Marko Polajnar, Lucija Čoga, Mitjan Kalin   +2 more
doaj   +1 more source

Child welfare stamps [PDF]

Archives of Disease in Childhood, 2000
Some countries regular issue child welfare stamps, often on an annual basis, with an incorporated surcharge to raise funds …
M K, Davies, A J, Mayne
openaire   +2 more sources