Abstract Lead halide perovskites have recently attracted attention due to their outstanding photoelectric properties. Hence, perovskite‐based optoelectronic devices are widely studied. Herein, a simple solution‐based one‐step anti‐solvent method produce well‐controlled and uniform CH 3 NH PbBr ‐based micro‐devices is reported. It confirmed that the size mode numbers of self‐assembled microdisk cavities can be well controlled by modifying SiO 2 microdisks on substrate or changing...

The bright-dark soliton pair in a passively mode-locked fiber laser based on the topological insulator: Bi <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Se xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> /polyvinyl alcohol (PVA) film proper polarization state and pump power is experimentally demonstrated. By carefully adjusting state, could be easily observed. Furthermore, it found that formation of mainly due to effect high...

The synthesized perovskites are randomly distributed and their optical properties fixed after synthesis. Here we demonstrate the tailoring of lasing perovskite microwire via micromanipulation. One has been lifted by a tungsten probe repositioned on nearby microplate with one end suspended in air. Consequently, conventional Fabry–Perot lasers completely suppressed single laser peak observed. numerical calculations reveal that single-mode is formed whispering-gallery mode transverse plane...

Abstract Ultrasensitive and rapid detection of nano‐objects is crucial in both fundamental studies practical applications. Optical sensors using evanescent fields microcavities, plasmonic resonators, nanofibers allow label‐free down to single molecules, but applications are severely hindered by long response time device reproducibility. Here, an on‐chip dense waveguide sensor monitor unlabeled nanoparticles a strong optical field demonstrated. The spiral nanowaveguide design enables two...

Lanthanide (Ln3+ )-based ultraviolet B (UVB) microlasers are highly desirable for diagnostics and phototherapy. Despite their progress, the potential applications of UVB strongly hindered by low optical gain, weak light confinements, poor device repeatability. Herein, a novel all-in-one approach to solve above limitations realize mass-manufactural is reported. The gain coefficient at 289 nm improved from two aspects, i.e., enhanced absorption via LiYbF4 :Tm(1mol%)@LiYbF4 @LiLuF4...

Abstract Pregnant ewes mobilize body fat to increase energy supply for fetal growth and development upon undernutrition, which disrupts the metabolic homeostasis of body. However, comprehensive changes in subcutaneous adipose tissue undernutrition are poorly understood. In this study, an sheep model was established investigate effects on changes, immune response, inflammation through transcriptome, RT‐qPCR, metabolome analysis. Results showed that changed total transcriptional profiles...

Solution-based perovskite nanoparticles have been intensively studied in the past few years due to their applications both photovoltaic and optoelectronic devices. Here, based on common ground between solution-based random lasers, we mirrorless lasing actions self-assembled nanoparticles. After synthesis from a solution, discrete peaks observed optically pumped perovskites without any well-defined cavity boundaries. We demonstrated that origin of emissions is scattering nanostructures...

Abstract Chirality in microcavities has recently shown its bright future optical sensing and microsized coherent light sources. The key parameters for such applications are the high quality (Q) factor large chirality. However, previous reported chiral resonances either low Q modes or require very special cavity designs. Here we demonstrate a novel, robust general mechanism to obtain chirality circular cavity. By placing spiral proximity, show that ultra-high factor, unidirectional output can...

The algorithm of joint polarization-DOA estimation is presented in this article based on polarization sensitive circle array. This realizes and DOA by MUSIC, avoiding restriction to the array structure parameter association ESPRIT. At same time assures array&apos;s effective aperture invariant at all directions, moreover comparing with normal array, resolution much improved. composed crossed dipoles which distributed around circle. Its availability confirmed computer simulation. (5 pages)

Next-generation integrated photonic circuits (PCs) require the combination of on-chip coherent light sources and modulators to increase integration density reduce energy consumption. While significant advances have been accomplished in direct laser modulation channeling modulated emissions into waveguides, there is still an enormous challenge distributing signals their designed ends. Here we show that outputs from microcavities can be directly by local perturbations. We demonstrate this...

BACKGROUND Chronic constipation is a common gastrointestinal disease. Our previous studies confirmed that there are differences in the composition and function of gut microbiota between women reproductive age with chronic healthy controls. However, little known about metabolic profile 2 groups. The aim this study was to observe changes serum metabolites identify potential pathways development constipation. MATERIAL AND METHODS A total 50 participants were included study: 25 female patients...

The detection of the singleton attractors is great significance for systematic study genetic regulatory network. In this paper, we design an algorithm to compute and pre-images strong-inhibition Boolean networks which a biophysically plausible gene model. Our can not only identify accurately attractors, but also find easily Based on extensive computational experiments, show that time proportional number indicates has much advantage in finding with high average degree less inhibitory...

With the deterioration of electronic environment, using signals DOA (direction arrival) parameters has great significance to preselect multiple radar pulses. Cluster analysis as an important means data classification, is gradually applied signal sorting. In this paper, a novel method sorting flowsheet proposed based on Fuzzy Clustering sort emitters objects, with dynamic clustering for reference and Gaussian distance function instead Euclidean distance. This avoids establishing enormous...

A novel real-valued algorithm of the popular root multiple signal classification non-circular sources (NC-root-MUSIC) is developed for low-complexity direction arrival (DOA) estimation. The proposed NC-root-MUSIC (RV-NC-root-MUSIC) reduces computational burden mainly in following three aspects. First, unlike classical algorithms, such as unitary transform, complex-valued operation still implemented when acquiring DOAs. However, RV-NC-root-MUSIC implements received data. Therefore, both tasks...

Most of the reconstruction-based robust adaptive beamforming (RAB) algorithms require covariance matrix reconstruction (CMR) by high-complexity integral computation.A Gauss-Legendre quadrature (GLQ) method with highest algebraic precision in interpolation-type is proposed to reduce complexity.The interference angular sector RAB regarded as GLQ range, and zeros threeorder Legendre orthogonal polynomial selected nodes.Consequently, CMR can be efficiently obtained simple summation respect three...

Polynomial fitting method is widely used in GPS height conversion into normal heights survey engineering and whcih has become a hotspot. Different models different area of interpolation have precisions, therefore, it very important to optimize model before order obtain high precision. Lots practice proven that The conicoid could satisfied forth degree demand, but there no proof why the better. So, paper introduce AIC choose better for transforming height, we separate value two parts, <sub...

Flooding is a simple technique in wireless sensor networks where source or node sends packets through every outgoing link, which similar to broadcasting. A pure flooding quite reliable, however, it clearly too expensive. Data are being transmitted via all nodes that required forward the exactly once. In this paper, we introduce new protocol based on flooding, time competition (TCF) for multi-hops high density networks. elections process, tradeoff node's residual energy and location...

For differential unitary space-time modulation (DUSTM), the bit-error performance is affected by type of labeling. In this paper, we used Binary Switching Algorithm (BSA) to optimize labeling cyclic constructed DUSTM constellation. Instead time-consuming simulation, an easily-calculated cost function estimate impact different types on for DUSTM. And proposed a simple and effective rule construct initial application BSA Simulation results show that DUSTM, optimized outperforms regular...

Three dimensional (3D) shape lies an unresolved and active research topic on the cross-section of computer vision digital photogrammetry. In this paper, we focus 3D object reconstruction from uncalibrated images put forward a hybrid method. The recovering comprises two steps, firstly, calculate homography transformation to obtain outlines, secondly, reconstructed height by vanishing point line reference height. This method requires no camera calibration or estimation fundamental matrix;...

Cognitive radio is recognized as an efficient way to improve the spectrum efficiency. In distributed cognitive networks of multiple primary users and a secondary user, we proposed utility function based on idle probability by using game model. The can achieve Nash equilibrium adjusting learning rate through repeated games. Simulations show that user whose larger, system higher becomes largest when offered totally idle. Besides, not total profit maximized. cooperative optimality solution...

There are many mathematical models in GPS height conversion fitting algorithms, such as polynomial surface fitting, Multi-surface function, BP neural network and so on. The paper is focused on the algorithms summary of these kinds approaches something useful concluded.

How to transfer GPS heights into normal has become a hotspot in survey engineering. There are many GIS fitting methods adopted conversion. A solution is sought the points where collocated by (getting h) and geometry leveling H) certain area, we could get values of Quasi-geoid these points. We call GPS/leveling points, namely known In this method, consider area interpolation be polynomial surface or other mathematical model, then can construct model plan coordinates X, Y N N=f(X,Y), using...