Wind power generation is growing fast as one of the most promising renewable energy sources that can serve an alternative to fossil fuel-generated electricity. When wind turbine generator (WTG) extracts from wind, wake evolves and leads a considerable reduction in efficiency actual generation. Furthermore, effect lead increase turbulence induced fatigue loads reduce life time WTGs. In this work, pulsed coherent Doppler lidar (PCDL) has been developed deployed visualize wakes characterize...

With the advancement of nanotoxicology and nanomedicine, it has been realized that nanoparticles (NPs) interact readily with biomolecular species other chemical organic matter to result in biocorona formation. The field environmental health safety nanotechnology, or NanoEHS, is currently lacking significant molecular-resolution data, we set out characterize formation through electron microscopy imaging circular dichroism spectroscopy inspired a novel approach for molecular dynamics (MD)...

The accurate three-dimensional wind field obtained from a Doppler lidar not only helps to comprehend the refined structure of complex airflow but also provides important and valuable solutions for many fields. However, underlying homogeneity assumption typical retrieval methods, such as Beam Swinging (DBS) Velocity Azimuth Display (VAD) based on single-lidar, will introduce measurement uncertainty in terrain. In this paper, new design campaign involving seven lidars was carried out, which...

This paper presents a method for measuring atmosphere temperature profile using single iodine filter as frequency discriminator. high spectral resolution lidar (HSRL) is system reconfigured with the transmitter of mobile Doppler wind and receiving subsystem redesigned to pass backscattering optical signal through cell twice out aerosol scattering allow analysis molecular spectrum, thus temperatures. We report what are believed be first results vertical profiling from ground 16 km altitude by...

Aircraft wake vortices are serious threats to aviation safety. The Pulsed Coherent Doppler Lidar (PCDL) has been widely used in the observation of aircraft due its advantages high spatial-temporal resolution and precision. However, post-processing algorithms require significant computing resources, which cannot achieve real-time detection a vortex (WV). This paper presents an improved Convolutional Neural Network (CNN) method for WV locating grading based on PCDL data avoid influence...

The folding of bacterial tRNAs with disparate sequences has been observed to proceed in distinct mechanisms despite their structural similarity. To explore the landscapes tRNA, we performed ion concentration-dependent coarse-grained TIS model MD simulations several E. coli compare thermodynamic melting profiles classical absorbance spectra Crothers and co-workers. independently validate our findings, also atomistic empirical force field tRNAs, compared base-to-base distances from...

Low-level wind shear is usually to be a rapidly changing meteorological phenomenon that cannot ignored in aviation security service by affecting the air speed of landing and take-off aircrafts. The lidar team Ocean University China (OUC) carried out long term particular researches on low-level identification regional inducement search at Beijing Capital International Airport (BCIA) from 2015 2020 operating several pulsed coherent Doppler (PCDL) systems. On account improved glide path...

Transport flux (TF) is a significant particulate matter (PM) characteristic. This paper introduces an advanced dual-wavelength polarization aerosol and wind lidar (Wind Flux 3000) capable of independently observing the PM TF. The TF observation capability, which allows for simultaneous measurements, was achieved by integrating Mie-polarization particle module coherent Doppler into single system. primary measurement products Wind 3000 include extinction coefficient at 532 nm 1550 nm, volume...

Usually, lidar detection systems are optimized for the measurement of low intensity signal using photon counting technique, but this approach results in nonlinear response higher signal.The problem is successfully solved by combination analog-to-digital (AD) and photoncounting (PC) detection.The processing procedure AD PC described, corrected result analyzed compared with dead-time correction method.In way, accuracy wind aerosol range improved.In addition, signal-to-noise ratios (SNRs) two...

We present a True Random Number Generator (TRNG) using the images taken by web or mobile phone cameras. use all three RGB color channels to obtain random numbers whereas previous studies used only one. investigated physical and statistical properties of noise in digital photograph obtained camera system, we made several approximations efficiently collect best signals from pixels map them sequences. In short, algorithm excludes each pixel's saturated values get its unbiased bits. An...

The indispensable access to real turbulent wake behavior is provided by the pulsed coherent Doppler Light Detection and Ranging (LIDAR) which operates transmitting a laser beam detecting radiation backscattered atmospheric aerosol particles. shift in frequency of signal analyzed obtain line-of-sight (LOS) velocity component air motion. From LOS velocities characteristic can be deduced. Coherent LIDAR (CDL) based on all-fiber technology fast digital-signal-processing technology. 1.5 µm...

Abstract A practical method for instrumental calibration and aerosol optical properties retrieval based on coherent Doppler lidar (CDL) sun photometer is presented in this paper. To verify its feasibility accuracy, applied into three field experiments 2019 2020. In method, multiwavelength (440, 670, 870, 1020 nm) depth (AOD) from sun-photometer measurements are used to estimate AOD at 1550 nm calibrate integrated CDL backscatter signal. Then it validated by comparing the retrieved calibrated...

DNA G-quadruplexes in human telomeres and gene promoters are being extensively studied for their role controlling the growth of cancer cells. have been unambiguously shown to exist both vitro vivo, including guanine (G)-rich genes encoding pre-ribosomal RNA (pre-rRNA), which is transcribed cell's nucleolus. Recent studies strongly suggest that these sequences ("rDNA"), rRNA, a potential anticancer target through inhibition polymerase I (Pol I) ribosome biogenesis, but structures ribosomal at...

Co-immobilization of PPL and GOx on DUT-5/PVDF hybrid membranes was used in the cascade catalytic oxidation glucose styrene.

Abstract. As modern wind power industry quickly develops, it is of high priority to optimize layouts and operations turbines reduce the influences wakes induced by upstream turbines. The wake behaves complicatedly with land ocean-atmosphere interactions. This complex could be observed two or more synchronously operated Doppler lidars. Accordingly, we characterized a turbine evolving over an intertidal zone performed dual-lidar observations. Dynamic process merging that occurred from...

Turbulent wake of wind turbine will reduce the power output farm. The access to real turbulent blades with different spatial and temporal scales is provided by pulsed Coherent Doppler Lidar (CDL) which operates transmitting a laser beam detecting radiation backscattered atmospheric aerosol particles. In this paper, authors discuss possibility using lidar measurements characterize complicated field, specifically velocity deficit wake.

The Key Laboratory of Ocean Remote Sensing the Ministry Education China, University has developed first mobile Doppler wind lidar in China. As an important component meteorological services for Good Luck Beijing 2007 Qingdao International Regatta, was used to measure sea surface (SSW) with 100 m*100 m spatial and 10-min temporal resolution from 15 23 August 2007. We present results two aspects this campaign. First, operated fixed-direction mode compared SSW simultaneously measured by a...

The direct and indirect radiation forcing of aerosol particles deeply affect the energy budget atmospheric chemical physical processes. To retrieve vertical mass fluxes to investigate transport process by a coherent Doppler lidar (CDL), practical method for instrumental calibration optical properties retrieval based on CDL sun photometer synchronization observations has been developed. A conversion microphysical is achieved applying well-developed algorithm. Furthermore, combining velocity...