The multi-point simultaneous long-term measurement of CO_(2) concentration in seawater can provide more-valuable data for further understanding of the spatial and temporal distribution of CO_(2).Thus,the requirement f...
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The multi-point simultaneous long-term measurement of CO_(2) concentration in seawater can provide more-valuable data for further understanding of the spatial and temporal distribution of CO_(2).Thus,the requirement for a low-cost sensor with high precision,low power consumption,and a small size is becoming *** this work,an in-situ sensor for CO_(2) detection in seawater,based on a permeable membrane and non-dispersive infrared(NdIr)technology,is *** sensor has a small size(Ф66 mm×124 mm),light weight(0.7 kg in air),low power consumption(<0.9 W),low cost(d high-pressure tolerance(<200 m).After laboratory performance tests,the sensor was found to have a measurement range of(0–2000)×10^(-6),and the gas linear correlation r^(2) is 0.99,with a precision of about 0.98%at a sampling rate of 1 s.A comparison measurement was carried out with a commercial sensor in a pool for 7 days,and the results showed a consistent ***,the newly developed sensor was deployed in Qingdao nearshore water for 35 *** results proved that the sensor could measure the dynamic changes of CO_(2) concentration in seawater continuously,and had the potential to carry out long-term observations on an oceanic *** is hoped that the sensor could be applied to field ocean observations in near future.
The main challenge of ultrasound-guided minimally invasive surgeries is to carry out treatments through small boreholes in the patient's body surface with sub-millimetric accuracy and facility offered by ultrasoun...
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In this study, Nickel@Copper (Ni@Cu) bimetallic electrodes were fabricated via electrodeposition to assess their efficacy in electrochemical nitrate reduction (ENr). The Ni@Cu 3m electrodes achieved a remarkable nitra...
In this study, Nickel@Copper (Ni@Cu) bimetallic electrodes were fabricated via electrodeposition to assess their efficacy in electrochemical nitrate reduction (ENr). The Ni@Cu 3m electrodes achieved a remarkable nitrate (NO 3 − ) reduction efficiency of 96.09% and nitrogen selectivity of 96.08% at a current density of 1.36 mA/cm² over an 8-hourreaction period. Extensive characterization techniques, including TEM, XPS, and Xrd, were employed to analyze the structural and morphological features of the electrodes. Cyclic voltammetry was used to examine electron transfer interactions between surface nitrogen (N 2 ) species and copper foam electrodes, nitrate (NO 3 − ) reduction commenced within a potential range of −0.8 V to 0.1 V. The Ni loading on copper foam was optimized to enhance catalytic performance, and the effect of different pH levels on activity was systematically studied. The Ni@Cu 3m electrodes demonstrated excellent long-term stability over 10 cycles, maintaining high efficiency and selectivity over multiple cycles. These results highlight the strong potential of bimetallic electrodes as efficient andreliable candidates for NO 3 − reduction in wastewater treatment applications.
In this paper, we discuss the excitation module in the magnetic induction system. First, we start from the traditional sinusoidal input resonant excitation circuit and give the frequency domain equation of its excitat...
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A new method for calculating indicated mean effective pressure (i.m.e.p.) was derived from harmonic analysis of pressure waveform in working space, instead of conventional numerical integration of the pressure-volume ...
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A large amount of ultra-low-power consumption electronic devices are urgently needed in the new era of the internet of things,which demandrelatively low frequency ***,atomic layerdeposition has been utilized to fabr...
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A large amount of ultra-low-power consumption electronic devices are urgently needed in the new era of the internet of things,which demandrelatively low frequency ***,atomic layerdeposition has been utilized to fabricate the ion polarization dielectric of the Li PON-Al_(2)O_(3) hybrid *** Li PON thin film is periodically stacked in the Al_(2)O_(3) *** hybrid structure presents a frequency-dependent dielectric constant,of which k is significantly higher than the aluminum oxide matrix from 1 k Hz to 200 k Hz in *** increaseddielectric constant is attributed to the lithium ions shifting locally upon the applied electrical field,which shows an additional polarization to the Al_(2)O_(3) *** work provides a new strategy with promising potential to engineers for the dielectric constant of the gate oxide and sheds light on the application of electrolyte/dielectric hybrid structure in a variety of devices from capacitors to transistors.
A polarization-separating metalens at the long-wavelength infrared was designed, developed, anddemonstrated. The silicon quadrangular pillars are adopted as meta-atoms to achieve full 2π phase coverage at the design...
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A method based on die casting experiments and mathematic modeling is presented for the determination of the heat flow density (HFd) and interfacial heat transfer coefficient (IHTC) during the high pressure die cas...
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A method based on die casting experiments and mathematic modeling is presented for the determination of the heat flow density (HFd) and interfacial heat transfer coefficient (IHTC) during the high pressure die casting (HPdC) *** were carried out using step shape casting and a commercial magnesium alloy,*** profiles were measured andrecorded using thermocouples embedded inside the die. Based on these temperature readings,the HFd and IHTC were successfully determined and the calculation results show that the HFd and IHTC at the metal-die interface increases sharply right after the fast phase injection process until approaching their maximum values,after which their values decrease to a much lower level until the dies are *** patterns of heat transfer behavior were found between the die and the casting at different *** thinner the casting was,the more quickly the HFd and IHTC reached their steady ***,the values for both the HFd and IHTC values were different between die and casting at different thicknesses.
Based on the research characteristics of the C-shaped steel structure of the photovoltaic agricultural greenhouse, the stress and strain under the design load of the solar cell module support are tested. Compared with...
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An interesting phenomenon was found that fluorophore was introduced into ionic liquid(IL)to magnify fluorescence signal via the thermally activateddelayed fluorescence process;thus up to 15 fold enhancements were ***...
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An interesting phenomenon was found that fluorophore was introduced into ionic liquid(IL)to magnify fluorescence signal via the thermally activateddelayed fluorescence process;thus up to 15 fold enhancements were ***,we reported a succinct enhanced luminescence strategy to reduce single-triplet energy split by the tunability of *** strategy could be extended to more kinds of ILs by the virtue of a preliminary dFT calculation ***,the optical feature of IL sensor made it a promising candidate as a gas fluorescence sensor.
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