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Online since: February 2019
Authors: E.N. Popova, I.L. Deryagina, E.G. Valova-Zaharevskaya
The structure of final diffusion layers is also affected by the regimes of these preliminary treatments.
The latter are complicated multicomponent composites including materials with different mechanical and physical properties, and their fabrication is a high-technological process, various factors of which (manufacturing route, wire design, doping, heat treatment schedules, etc.) play a great role in the structure obtained and, consequently, in their current-carrying capacity.
Specimens for TEM studies were prepared as thin foils of longitudinal sections of rods and wires by mechanical thinning and further chemical etching.
Online since: December 2024
Authors: Masato Tominaga, Yogi Mirza Pangestu Utomo, Risnawati Risnawati, Widi Astuti, Fikan Mubarok Rohimsyah, Fredy Kurniawan, Yunita Triana, Andi Idhil Ismail
How does immersion time in NaOH solution influence the structural and electrochemical properties of the activated carbon?
Moreover, can OPEFB-activated carbon demonstrate sufficient electrical properties to be considered a viable material for battery electrodes?
Many factors can influence this fluctuating phenomenon of generated voltage.
This is influenced by many factors such as the use of activators, anode and cathode materials and the type of biomass used, moreover during the manufacturing process, each method will also affect the results obtained.
Tseng, “Physical and chemical properties and adsorption type of activated carbon prepared from plum kernels by NaOH activation,” J.
Online since: July 2021
Authors: Vitalii A. Korotkov, Aleksandr Korotkov, Stefan Vöth, Vasilii Fedorov
The obtained test results demonstrate that grinding wheels based on high-density polyethylene during finishing have their service factors at the same level or even higher than those of tools with other common types of binding substances [16, 17, 18].
The working peripheral surface of the experimental wheels after the very first pass acquired a dark shade (to a depth of about 0.1 mm) due to the thermal effect on polyethylene and some contamination by grinding products, which did not affect the stability of the tool properties in dynamics.
[Creation of instrumental diamond-containing materials on polyolefin matrices with a given set of properties.
[9] Vöth S., Korotkov A.N., Influence of Efficiency Factors of Gearing and Rope Drive in the Hoist Behaviour., E3S Web Conf.
Baboshkin, Tekhnologii shlifovaniya v mashinostroenii [Grinding technologies in mechanical engineering], St.
Online since: July 2003
Authors: P. Lin, Yu Fang Fu, W.Y. Zhou, Chun An Tang, R.H.C. Wong
It is found from these studies, that the strength, the orientation of the macroscopic failure plane, the dilatancy, and other mechanical features are greatly affected by the confining pressure, friction between surface of the pre-existing flaws and the flaw geometry.
The experimenatl specimens were made by modelling material with physical properties like sandstone.
The confinement and perpendicular distance between flaws are important factors affecting on the failure patterns for specimens containing pre-existing flaws with different size or geometry distribution.
Online since: May 2020
Authors: Wen Hong Liu, Nai Xin Lyu, Qiu Rong Ma, An Qing Fu, Wen Sheng Li
Generally, the design of tubing string should consider mechanical properties and sealing.
Harsh service environment often leads to premature damage of gas well, such as tubing junction failed, which seriously affects the safety of completion operation of the well.
Flow with high velocity can promote the renewal of corrosion medium, affect the formation of corrosion product film, accelerate the migration of the corrosion products and eventually accelerate corrosion [7,8].
Other factors, such as the effect of corrosion product film to the corrosion process, are not taken into account in the calculation of corrosion rate.
A simplified calculation model of gas-liquid scouring corrosion rate at threaded connections in high productivity gas wells has been established. 2) The phase distribution and flow characteristics in the groove structure of tubing threaded connection are significantly affected by the main flow velocity.
Online since: March 2004
Authors: J.Y. Lee, Jae Ho Lee, Young Mok Rhyim, Young-Sang Na
Introduction Dynamic recrystallization (DRX) is recognized as an important tool for microstructure refinement [1] and property control during hot deformation processes [2].
It is well known that deformation conditions (temperature and strain rate) as well as microstructural aspects (initial grain size and precipitates) in general affect the critical strain for DRX initiation.
The mechanical properties of Alloy 718 depend very much on grain size, which can be controlled by dynamic recrystallization taking place during hot deformation process.
It implies that the controlling factor for DRX nucleation is not the matrix precipitate (�”) or grain boundary phase (�), but the strain rate, i.e. the dislocation accumulation rate on grain boundaries.
Online since: February 2013
Authors: Zhu Zhu, Xu Long Yuan, Ya Dong Wang, Yun Ju Yan
An important part of the numerical simulation is the grid which the quality has great influence on the calculation precision, and also the influence often is crucial factor in most of situation.
Because of the limitation of the multiphase fluid, the meshing technique may affect the calculation results, such as the clarity of capture interface and the difference of numerical mechanical property caused by mesh quality of the body surface.
Online since: March 2008
Authors: Zhen Jia Li, Yao Nan Cheng, Wei Jun Sun, Yong Gang Zhao
The stress field relating with milling force affects the impact disrepair directly.
In order to judge the stress field, many factors must be taken into account, and some of them are difficult to be quantificational, so it is blurry.
Therefore the judgement of milling insert stress field must take into account many factors, and have the blurry synthetical judgement.
The Impact Disrepair Life Cumulating Distribution Function Mathematic Model Weibull Function Property Analysis.
Tao: Chinese Journal of Mechanical Engineering, Vol.36 (2000), pp. 42-45.
Online since: August 2014
Authors: Tian Rui Zhang, Dong Dong Cai, Kai Li, Ni Wang
Researches on Resource Allocation of Virtual Enterprise Based on Multi - Agent Wang Ni1, Zhang Tianrui2, Cai Dongdong3 and Li Kai4 1, 4School of Business Administration, Northeastern University, China, tianjiangruixue@126.com 2School of Mechanical Engineering and Automation, Northeastern University, China 3School of Economics, Shenyang University of Technology, China Keywords: Multi-Agent, Virtual Enterprise, Resource Allocation, Partners Abstract.
Introduction For enterprises, it was an important factor to make full use of its resources to keep competitive advantage if they want, in order to realize the optimization of resource integration and utilization.
(5) Management of invisible property :intangible assets was the concentrated reflection of the overall strength of virtual enterprise, the condensation of the technology of virtual enterprise, the design level and technology level, development level, management level and the level of marketing .
Table 2 Comparison table of BRP implementation stages of component, task and typical activities Phase component The task and typical activities Phase 1 Discover Mobilize; assess; select; engage Start the project; The development of communication strategy; Challenges and build team; Establish a vision; Assessment of organizational culture Phase 2 Design Mobilize; analyze; innovation; commit The continuous assessment of both the process (cultural and technological factors); Finally summarized, and ensure the organizational change Phase 3 Implement Mobilize; act; link The comprehensive integration of organizational change and structure, process, technology, personnel and other factors Virtual Enterprise Resource Planning Based on Agent Virtual enterprise was generated by the advent of the Internet.
Although through the implementation of MRP Ⅱ and ERP, enterprise resource was configured more efficiently, the limitations of its single enterprise affected resource configuration effect.
Online since: August 2013
Authors: Chuan Ri Li, Tian Ma, Shuang Long Rong
Statistics show that the environment failure factors in airborne electronic equipment, the failures caused by the temperature factor are 45% of the all failures, and caused by vibration is 27%, the total failures that they are caused are more than 70%, temperature and vibration are the two key factors that affect product reliability.
Analysis it’s structure CAD model, establish it’s finite element model(FEM), in order to reduce computational resources without changing the structure mechanical characteristics and calculation accuracy, simplify the CAD model locally[4], such as remove chamfering, bolt, screw holes and small round holes, model components by using same weight and volumetric mass, etc.
Choose appropriate meshing partition method, set up the contact relationships and constraints, set material property to get the finite element model for analysis(figure 2).
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