Abstract The effects of tool rake angle and cutting depth on temperature, force, friction coefficient face, atomic accumulation chip flow removal, surface quality, sub-surface damage layer thickness, stress, dislocation evolution were studied by molecular dynamics simulations. results showed that the temperature was concentrated chip, easy to out with increase angle, which weakens extrusion shearing action workpiece, resulting in gradual reduction tangential force. 10° is beneficial improve...

Amorphous-dominated magnesium oxide hollow spheres (A-MgO) were prepared using a spray-drying method in this study. These exhibited excellent sphericity, large specific surface areas, and abundant porosity. A-MgO outstanding fluoride adsorption properties, with maximum capacity of 260.4 mg/g. When the pH value was less than 8, removal percentage remained more 87.4%. Moreover, above 75% even after five application cycles. In addition, research revealed that SO42-, CO32-, PO43- exerted...

Abstract Five micro-textures were processed on the rake face of PCBN tools: circular pits, elliptical grooves, transverse composite and wavy grooves. The effect different cutting force, temperature, micro-morphology serrated chips, tool wear surface roughness investigated utilizing three-dimensional finite element simulation tests. results indicates that micro-textured tools can lower force when compared to non-textured tools, while varies significantly during process. Micro-texture decrease...

To study the effect of micro-texture on cutting performance polycrystalline cubic boron nitride (PCBN) tools, five types micro-textures (circular pits, elliptical grooves, transverse composite and wavy grooves) were applied to rake surface PCBN tools by an optical fiber laser marking machine. Through a combination three-dimensional simulations experiments, influences chip–tool contact area, force, chip morphology, shear angle, roughness during process analyzed. The results indicated that...

Abstract To investigate the tensile behavior and mechanical properties of single-crystal aluminum nitride (AlN) at microscopic level, molecular dynamics simulations were used to study effects crystal orientation, strain rate, environmental temperature, hole defect size on fracture strength, mechanism, potential energy during uniaxial tensile. The results show that strength AlN in [100] direction is stronger. anisotropic characteristics Al-N bonds crack growth cracking degree are significant...

The authors present a novel stochastic approach called the annealing-genetic algorithm for one-dimensional bin-packing problem. This incorporates genetic algorithms into simulated annealing (SA) to improve performance of SA. SA seems facilitate exhaustive and parallel treatment problem increase probability finding global minima. empirical results show that quality solution obtained with this is better than or equal FFD (first-fit-decreasing) in average cases but all known worst cases. Unlike...

This paper presents both experimental and unsteady RANS investigations of a slot-type casing treatment at transonic axial flow compressor rotor. Experimental results show that 60% 98% rotor design wheel speeds, approximately 100% 200% extra extensions the operation ranges are achieved, respectively. On other hand, there about 3.6% 2.0% drops efficiencies speeds respectively if comparisons made same peak-efficiency mass rates solid case. If comparing respective peak for case with those...

As multi-agent meets characteristics of distributed control architecture and lots nodes in intelligent building, the construction is expected to overcome existing problems as well. Introduce agent-based approach into building great significance. We propose a model system based on which owns pure architecture. The different functions levels agents are described. At same time, we discuss intentional cooperation method used through an example was multi agent. Finally, finish temperature...

BP artificial neural network is a non-feedback network. This paper utilizes the initial weights of neural network to choose controller performance. Simultaneously according to the characteristics that process of central air-conditioning energy saving control is the system of multi-parameter and nonlinear time-varying complexity, we analysis and study its algorithm and system architecture. The experimental results   demonstrate   that new control system gets better results and energy saving.

The paper mainly covers the Goal, Plan and Content of New Airplane Develop System Based on 3D-Digital Technique Multi-Companies Collaboration. Breaking through several key techniques have been gained, including product model definition technique based latest digital technique, whole airplane design/design modification automation response multilevel concurrent engineering modular design state manage multi-companies multi-suppliers cooperating develop large assembly butting etc. Moreover, new...

This article introduces cloud model to estimation of quality service for voice communication network. It presents ideas design, implementation procedure, carries out analysis related key techniques, puts forward an improved backward generator algorithm and conducts validating experiments. The results show that this can handle the fuzziness randomness network well, adjust uncertainty hyper-entropy brings, reduce impact human factors, estimate grade correctly provide strong fundaments further...

Motivation: The potential pathophysiologic mechanisms related to trigeminal neuralgia (TN) needed elucidation, and alternative biomarkers of TN be identified. Goal(s): To explore atrophy in specific subregions the thalamus, which may contribute pathophysiology TN. Approach: We used vertex-based shape analysis evaluate differences thalamus volume patients with determine location regional thalamic atrophy. Results: revealed distinct brain structural disparities between exhibiting symptoms on...

Purpose This study aims to investigate the effect of microtextured tools on geometric morphology serrated chips, and further improve cutting performance polycrystalline cubic boron nitride (PCBN) tool extend life surface quality machined surface. Design/methodology/approach A three-dimensional finite element model hardened steel AISI D2 with PCBN were established using software Abaqus, tests carried out. Furthermore, stress distribution in primary deformation zone was investigated based...

This paper describes a Windows CE-based intelligent system that integrates control and monitoring in one platform. The overall structure of the is given some techniques used inside customization transplantation CE OS are introduced as well. These key include development device drivers CE, realization preserving registry data when power off, points building special-purpose OS, bootloader. We have designed temperature for heat furnace based on this embedded platform, results demonstrate...

Numerical simulations with the steady 3D RANS were performed on a 4-stage low speed research compressor (LSRC) two typical configurations (a shrouded and redesigned cantilevered stator of third stator). The (SS) 0.67% labyrinth seal clearance blade height is prototype, (CS) 1.2% hub stator. fourth rotor that follows after was (RE) according to load inlet flow angle changed based overall performance LSRC distribution aerodynamic parameters along compared between prototype Flow characteristics...

The paper mainly covers the connotations, functions and key techniques of Aircraft Digital Cooperative Robust Integration Optimization Performance Simulation Technology. Airplane Design Platform, which has been established by construction analysis, a series Standard Specification Establishing, modules development supporting work implementation. It can be customized extended, it is easy to demonstrated. platform contains engineering database including model, simulation process data, results...