The rapid change of topology is one the most important factors affecting performance routing protocols flying ad hoc networks (FANETs). A scheme suitable for highly dynamic mobile proposed in complex scenarios. In moving nodes sense changes surrounding network periodically, and current scenario confirmed according to perceived result. Furthermore, a protocol selected maintaining performances at high level. concerned metrics are packet delivery ratio, throughput, average end-to-end delay...

To date, the existing terahertz super-resolution reconstruction methods based on deep-learning networks have achieved noteworthy success. However, image degradation process needs to fully consider blur and noise of high-frequency part during network training process, cannot be replaced simply by interpolation, which has high complexity. The model is systematically investigated, effectively solves above problems introducing remaining channel mechanism into network. On one hand, an suitable...

Terahertz scattering-scanning near-field optical microscopy (THz s-SNOM), combining the best features of terahertz technology and s-SNOM technology, has shown unique advantages in various applications. Consequently, building a model to characterize interactions investigate practical issues become popular topic THz research. In this study, finite element (FEM) is proposed quantify interactions, edge effect antenna s-SNOM. Our results indicate that can give us better understanding direct...

Traditional GaAs-based frequency multipliers still exhibit great challenges to meet the demand for solid-state high-power THz sources due low breakdown voltage and heat dissipation of Schottky barrier diode (SBD). In this study, a GaN SBD chain was fabricated with n-/n+-GaN structure. As consequence, 54.9 V at 1 μA cut-off 587.5 GHz zero bias were obtained. A 120 frequency-doubler module based on designed fabricated. When driven 500 mW input power in continuous wave, output 15.1 GHz....

Abstract Wind is one of the major processes modifying land surface in Hami Basin, as evidenced by wind deflation gravel lags, yardangs, and mantled eolian ripples. We report erosion rates for Basin using cosmogenic 10 Be measurements. Bedrock average 0.121 ± 0.0293 mm yr −1 , which similar to those other wind‐eroded arid basins East Asia, but anomalously low when modern near‐surface speeds are considered. posit that interglacial periods experienced lower than glacial periods, was likely once...

In this paper, a high efficiency and power 165–180 GHz balanced doubler based on the planar Schottky diode is presented. To maximize of in target frequency band, an in-band embedded impedance optimization method (IEIOM) adopted. The aims to extract conjugate value impedances three-dimensional electromagnetic (3D-EM) model diode. Compared at single point using Load-Pull, proposed not only takes account for both conversion bandwidth but also simplifies operation process. verify concept, was...

Cretaceous eolian deposits provide evidence of variations in the tropical-subtropical atmospheric circulation under greenhouse conditions. However, misinterpretation many such as fluvial or deltaic originally hindered precise paleoclimatic reconstructions. Here we report a newly identified Early desert Hami Basin, China, which helps understand spatial-temporal aridity and circulations within central East Asia during Cretaceous. The Liushuquan Formation is composed >300-m-thick...

The number of effective rice tillers determines the panicles and then affects final yield. Rice tillering ability shows great differences among cultivars under different environmental conditions, but underlying mechanisms are not clear. present paper investigated formation examined its genetic regulation, effects plant hormones, several factors affecting tillering, nitrogen’s regulation tillers. Finally, utilization weedy wild was investigated. We concluded that many genes involved in...

A reasonable q-deformed differential is defined. set of operation rules are constructed for the formal pseudo operators. The complete procedure constructing KdV hierarchies and their infinite conservation laws given. As an important example, he obtains a detailed structure simplest (3,2) system, i.e. equations.

Based on a W-band high-power source, two schemes are proposed to realize 335 GHz frequency multiplier source. The first scheme involves producing signal with two-stage doubler. doubler adopts two-way power-combined technology and the second stage is using balanced circuit suppress odd harmonics. measured output power was about 17.9 1.5 dBm at 167.5 GHz, respectively. other single-stage quadrupler built 50 µm thick quartz adopting an unbalanced structure. advantage of structure that it can...

Ceramic adhesive structures have been increasingly used in aerospace applications. However, the peaks of signal on upper and lower surface layer are difficult to measure directly due thin thickness effect attenuation dispersion ceramic layer. Thus, existing non-destructive testing techniques ineffective detecting quality. In this paper, is measured using terahertz time-domain spectroscopy. A sparse deconvolution method proposed for spectral with different thicknesses. The results show that...

Water vapor and cloud liquid water can influence the accuracy of sea surface height that spaceborne altimeter measures. Atmospheric correction microwave radiometer (ACMR) be used to retrieve amount by measuring radiation from atmosphere earth's surface. HY-2 satellite is a Chinese for ocean dynamic environmental monitoring. ACMR one payload satellite. Up now, has been in operation more than three years. In-orbit system stability years assessed. The data brightness temperature are matched...

Abstract Dust plays an important role in climate, and while our current representation of dust production includes shifts vegetation, soil moisture, ice cover, it does not account for the landscape evolution. Here, we use Weather Research Forecasting model coupled to aerosol chemistry quantify effects arid evolution on boundary layer conditions, production, radiative properties Hami Basin, China, a dynamic stony desert eastern Asia. Relative today, altered surface roughness, sediment...

Water vapor and cloud liquid water influence the accuracy of altimeter measurements by delaying time that altimeter's signals travel from satellite to ocean surface back. Atmospheric correction microwave radiometer (ACMR) can be used measure radiation atmosphere earth's so as retrieve amount water. HY-2 is a Chinese for dynamic environmental monitoring. It launched on Aug.16, 2011. ACMR one payloads. The other payloads are an altimeter, scatterometer scanning radiometer. started work Sep.1,...

CE-2 Lunar Microwave Sounder (CELMS) is the second passive microwave radiometer in world to sound surface of Moon on orbit 100 km. The scientific objective CELMS further obtain global brightness temperature (TB) Moon, retrieve information lunar regolith, and evaluate distribution helium-3 Moon. Before launch CELMS, calibration experiments were carried out laboratories test performances systems, derive transfer parameters paths CELMS. This paper procedure introduced method computing...

There are three retrieval algorithms developed for the HY-2A Atmospheric Correction Microwave Radiometer (ACMR). The validation Results of these and corresponding products (the wet tropospheric path delays) presented. Comparisons made between ACMR various sources including Jason2 Advanced (AMR), global climatological model (ECMWF).

Using the "δN-formalism," we obtain expression of non-Gaussianity multiple-field inflationary models with non-trivial field-space metric. Further, have rewritten result by using slow-rolling approximation.

HY-2 satellite is a new ocean-oriented which to monitor the dynamic ocean environment with microwave sensors detect sea surface wind field, height and temperature. In order correct altimeter path delay due atmosphere, there radiometer (ACMR) planned be installed in same satellite. ACMR three-band nadir-sounding passive radiometer, operates at 18.7, 23.8, 37.0 GHz. this paper, principles on retrieving of atmospheric wet are firstly introduced, then algorithms derived for using simulated...

AbstractThe atmospheric correction microwave radiometer (ACMR) is one of the main payloads for correcting path delay in radar altimeter on Haiyang-2A (HY-2A) satellite. The ACMR a three-band operating at 18.7, 23.8, and 37.0 GHz. Calibration important applying its measurements to correct effects HY-2A signal transmission air. Therefore, detailed introduction principles specifications system given first. thermal vacuum calibration method discussed analysed, transfer functions related...