A dual-band dual-polarised antenna for on-/off-body wireless body area network (WBAN) applications is presented, operating at Industrial, Scientific, and Medical bands of 2.45 GHz with circular polarisation 5.8 vertical polarisation. The TM11 mode used the off-body in first band because its broadside radiation pattern, meanwhile, TM02 chosen on-body due to monopole-like pattern second band. Composed a patch eight slots, structure proposed simple, it fabricated textile material. performance...

Ultrashort pulsed (USP) laser burst ablation has attracted numerous interests for its great potential in enhancing efficiency and reducing the heat-affected zone. However, little attention been paid to influence of on processed surface quality. To fill this research gap, present study conducts a comprehensive investigation processing stainless steel using ultrashort ablation. Systematic experiments have carried out investigate influences pulse number per (PpB), fluence, overlap ratio quality...

Thermal accumulation effect has proved to reduce ablation threshold and improve the rate during multi-pulse ultrafast laser ablation. It was widely believed that this cannot be triggered until repetition is raised megahertz range. In Letter, we experimentally discover strong thermal in fused silica at kilohertz rates its significant contribution enhance rate. found trigger are intrinsically determined by material diffusivity insensitive ambient conditions. We observe two-fold enhancement of...

As a highly reflective material, copper has been difficult to weld with IR lasers. Short-wavelength (400–600 nm) lasers offer promising solutions welding due significant increases in absorptivity (to > 50 %). In this work, we present an experimental study on by CW green laser. We unveil that nanoparticles redeposited the surface from vaporized plume can strongly modify condition and result enhancement of absorptivity. The be theoretically enhanced up 82 % compared polished surface. Assisted...

The effects of surfactants, such as sodium oleate soap, triethanolamine oleate, MOA, OP-4, had been studied for the dispersion molybdenum disulfide (MoS 2 ) in aqueous solution. And lubricating property water system observed by four-ball tester. results show that MOA and OP-4 have excellent composite effect MoS solution, having a best ratio (wt%) soap: MOA: = 1: 1.8: 2.

WS 2 has excellent tribological properties; it is emerging of lubricating materials. MoS commonly used solid lubricants and wide range applications, but its poor heat resistance. can well make up for the inadequate performance , uses as a lubricant in research on metallic By friction wear testing, paper gets feasibility analysis application that instead field lubrication, while exploring synergies between them, laying foundations manufacture new types composite lubrication coatings.

The reactionary trend of the triethanolamine and cobalt in cemented carbide mechanism leaching have been investigated by soaking experiments, friction experiments electrochemical gaging experiments. experimental results reveal that is prone to form coordination compound with ion .The amount cobalt’s element from added up increase time concentration. So when using cutting tool, water-based fluid containing addictive should be avoided.

Grinding fluid is the essential supplementary material in cemented carbide grinding process. The amine-base additive can make cobalt leach from carbide. Through test, this paper mainly studies influence of TEA-containing solution on leaching and mechanism by SEM AES, then identifies effective inhibitor. results are as follows: (1) TEA (2) Additive triethanolamine oleate obviously inhibit (3) benzotriazole (4)The mixture oleate, borax has best inhibition function. So it conclude: reduce...

In the cutting progress, temperature and friction will be reduced when water-based fluid is used, but some elements in result leaching of tungsten carbide cemented tool. The influence rule sodium carbonate on under condition different temperatures concentrations investigated by soaking experiments, SEM analysis, energy spectrum analysis electrochemical detection experiments. experimental results reveal that are great, rate increase with increasing concentration.

This study investigates the ablation process of stainless steels using ultrashort pulsed laser bursts with a MHz intra-burst repetition rate. Multiple parameters, including pulse fluence, number per burst, inter-burst rate and scan speed, are varied to their influences on process. Laser in single-pulse burst modes compared terms efficiency surface quality. It is found that burst-mode can generate much better quality than ablation, despite slightly reduced efficiency. Different types...

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9Cr2Mo steel is widely used as measuring and cutting tool steel. The friction wear behavior of was investigated under dry solid lubricant by tester. experiment results show that the coefficient 0.34~0.58 0.035~0.06 lubricant. With increase load , decreases wearing capacity increases two kinds conditions. great lower than it friction. process smooth It indicated took effect in antifriction antiwear

Cutting fluid occupies an important position in the metal processing. The performance and pollution problem brought to environment of cutting are paid attention day by day. Proceed from perspective green design, using castor oil which has a good biodegradability, triethanolamine, boric acid sodium polyacrylate whose molecular weight is less than 2×104 as main raw materials, boron-containing water-based had been obtained. B-containing measured according GB/T6144-1985 regulation technical...

We demonstrate a novel grating coupler design based on double asymmetric and vertically oriented waveguide scatterers to efficiently couple normally incident light fundamental mode silicon laying buried oxide layer.

Cutting fluid is the essential material in metal cutting process. This paper mainly studies influence of TEA-containing solution on cobalt leaching from cemented carbide tools and mechanism, then identifies effective inhibitor. The results are as follows: (1) TEA additive can make leach tools. (2) Addictive triethanolamine oleate obviously inhibit there exists best proportion. (3) mixture borax has inhibition function. So it conclude: reduce tools, which improves working life cutter reduces...

A new kind of high temperature solid lubricant coating was synthesized by adopting technique and using graphite, MoS2, Sb2O3 Al2O3. Its tribological behaviors lubricate mechanism were studied means wear testers. The experiment results show that the friction coefficient decreases with increase load slightly increases raise temperature. still has good lubrication in 400 .