Forthcoming and Online First Articles
International Journal of Nanomanufacturing
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International Journal of Nanomanufacturing (5 papers in press)
Abstract: The self-heating effect occurs when the bulk acoustic wave filter is loaded with power, leading to the deterioration of the insertion loss. In this paper, the self-heating effect of bulk acoustic wave filters at high frequency power is investigated. A test system is built to obtain the maximum surface temperature and the insertion lossof the bulk acoustic wave filter at different power levels. The test results show that the self-heating effect causes the internal temperature of the bulk acoustic wave filter to increase further after increasing the power, resulting in the increase of the insertion loss. The test system and analysis method in this paper verify the relationship between the self-heating effect and the insertion loss, and can provide guidance for the construction of the relevant reliability test system of the bulk acoustic wave filter.
Keywords: bulk acoustic wave filter; self-heating effect; insertion loss.
A Nanodata Authentication approach for a Management Middleware of NANOdevices
by Alberto Lopez, Jose Aguilar
Abstract: In this paper is presented the data authentication protocol (DAP) of the autonomic reflective middleware for the management of NANOdevices (ARMNANO) architecture, which is capable of the detection of outliers in nanodata. DAP is composed of two modules; the first one consists of typical statistical metrics on a variable, to be used in a second module based on a maximum likelihood estimation (MLE) to learn its distribution model. We found excellent results in three case studies where the context of application consisted of a nanosensor (NS) array in an epifluorescence microscope that monitors a neuromodulator, the serotonine (also called 5-hydroxytriptamine). In the first and second cases, we evaluate the top saturation point of the NS as a function of the type of NS and type of buffer, finding the zones of maximum authentication, while in the third case is assessed a time series nanodata of NS measuring 5-hydroxytriptamine in a dynamic flow system. Thus, we evaluated our nanodata authentication approach in a dynamic system with encouraging results.
Keywords: data authentication; NANOdevices; autonomic reflective middleware; neuromodulator.
Effect of MWCNT based Water Soluble Oil on Cutting Forces and Surface Roughness with Tool Wear in End Milling of Ti- 6Al-4V alloy
by Nazma Sultana, A.T. Shams, Prianka B. Zaman, N.R. Dhar
Abstract: Investigating the cooling and lubrication effects of MWCNTs-based nanofluids with surfactants in reducing cutting force and surface roughness compared to dry and wet is the main focus of this study. Beside this, searching out an optimal settings of process parameters including cutting speed, feed rate, depth of cut, and cutting environment in milling Ti-6Al-4V alloy is another prime objective. Box-Behnken design-based response surface methodology was employed for experimental design. To predict the chosen responses, quadratic models were developed. Analysis of variance results showed that the cutting environment has the highest significance, with a variation in cutting force and roughness of about 76.5 % and 49.9 %, respectively. Both responses were lowered significantly in nanoMQL over wet. Optimization using the composite desirability approach results that 32 m/min cutting speed, 22 mm/min table feed, 0.75 mm depth of cut, and NanoMQL were the optimal solution within the selected boundary constraints.
Keywords: Ti-6Al-4V; Nanofluid; Minimum quantity lubrication; Response surface method; Composite desirability approach.
A Strip-line Circulator/Isolator Module Based on MEMS Technology
by Junfeng Sun, Shuiping Liu, Shixing Jia, Keqiang Qian, Donxue Luo
Abstract: The traditional strip-line circulator/isolator module is realised by mechanical processing, which is large size and difficult to be installed with micro-assembly process. The miniaturised strip-line circulator/isolator module is realised by the micro-electro-mechanical systems (MEMS) bulk silicon process and the micro-assembly process. Measured within frequency range of 10~18 GHz, the insertion loss between ANT and Tx is less than 0.9 dB, even it can reach 0.4 dB when the return loss is less than
Keywords: strip-line; circulator; isolator; module; micro-electro-mechanical system; MEMS.
Design and simulation of LDO circuit
by Huijing Yang, Runze Lv, Mingyuan Ren
Abstract: With the rapid development of portable electronic products, the contradiction between the rapid rise in energy consumption of electronic products and the slow development of battery technology limits the application potential of many electronic devices. Low power consumption power management chips have become a research hotspot. In this paper, a closed-loop stable LDO circuit structure based on curvature compensation reference is designed using 0.18 ?m CMOS process. The designed LDO has high power rejection ratio and small static current, which is suitable for use as a power management chip in portable electronic products.
Keywords: integrated circuit; CMOS; LDO.