Elevated O3 concentrations pose a significant threat to human health and ecosystems, but little research has been performed on coastal wetlands near large cities. This study focuses investigating the key factors affecting formation in ecologically sensitive Dongtan Wetland (Chongming District, Shanghai, China) area. By comparing performance of concentration prediction multiple machine learning models, this found that random forest model achieved highest accuracy (R2 = 0.9, RMSE 11.5)....

Decarbonizing production activities is a critical task in the transition towards carbon neutrality. Traditional footprint accounting tools, such as life-cycle assessment (LCA) and Greenhouse Gas Protocol, primarily quantify direct indirect emissions but offer limited guidance on actionable reduction strategies. To address this gap, study proposes comprehensive optimization framework that integrates LCA with mixed-integer linear programming (MILP) model. The framework, while applicable to...

We used a computational fluid dynamics (CFD) model to study the inspiratory airflow profiles of patients with anterior nasal cavity stenosis who underwent curative surgery, by comparing pre- and postoperative characteristics. Twenty severe stenosis, including one case bilateral computed tomography (CT) scans for CFD modelling. The characteristics were simulated analyzed. narrowest area in all 20 was located within valve area, mean cross-sectional increased from 0.39 cm2 preoperative 0.78...

We discuss mode-entangled states based on the optical transverse modes of field propagating in multi-mode waveguides, which are classical analogs quantum entangled states. The discussed detail, including violation Bell inequality and correlation properties pulses' group delays. research these may be important, for it not only provides useful insights into fundamental features entanglement, but also yields new computation communication.

Two remarkable aluminum borophosphates (AlBPOs), namely, Na

Abstract Icing is ubiquitous in nature and engineering applications, imposes threats to road air transportations, wind energy infrastructures, etc. However, current active de‐icing solutions, especially the most popular one, i.e., heating, suffer from high consumption whilst passive methods are often ineffective at high‐speed, long‐term, or large‐particle conditions. Herein, a promising strategy adopting magnetic‐responsive microfins (MRS) featuring reversible deformations developed for...

Fast and reliable ambiguity resolution (AR) has been a continuing challenge for real-time precise positioning based on dual-frequency Global Navigation Satellite Systems (GNSS) carrier phase observation. New GNSS systems (i.e., GPS modernization, BDS (BeiDou System), GLONASS (Global Galileo) will provide multiple-frequency signals. The multiple-constellation signals are expected to bring great benefits AR. A new single-epoch AR method short-range baseline triple-frequency is developed in...

The use of global navigation satellite system (GNSS) is entering a new era joint positioning based on the multifrequencies and multimodes. Ensuring correct weighting observations from each has become key problem during real-time positioning. This paper addresses issue weights as well quality control GPS/BDS pseudoranges in context relative Thus, first place, Helmert variance component estimation (VCE) used to determine two systems, then, we introduce robustness theory construct method....

The gas-liquid counter-current flow limitation (CCFL) is closely related to efficient and safety operation of many equipment in industrial cycle. Air-water countercurrent experiments were performed a tube with diameter 25 mm understand the triggering mechanism CCFL. A parallel electrode probe was utilized measure film thickness whereby time domain frequency characteristics liquid obtained. amplitude interface wave small at low rate while it becomes large high after being disturbed by...

The correct ambiguity resolution between reference stations is the core issue of whole Network Real-Time Kinematic (RTK) technology. Aimed at long fixed time and low reliability elevation angle satellite during initialisation RTK system, a three-step algorithm proposed in this paper. Firstly, double difference wide-lane ambiguities are on basis Melbourne-Wubbena (MW) method. Secondly, L1 carrier phase high satellites rapidly based ionosphere-free combination model. Thirdly, corresponding...

Abstract A spherical TiCl 4 /MgCl 2 ‐based catalyst was used in the synthesis of polyethylene/polypropylene/poly (ethylene‐ co ‐propylene) in‐reactor alloys by sequential homopolymerization ethylene, propylene, and copolymerization ethylene propylene gas‐phase. Different conditions third stage, such as pressure ethylene–propylene mixture feed ratio were investigated, their influences on compositions, structural distribution properties studied. Increasing is favorable for forming random...

Increasing the distance between reference stations of network RTK can improve flexibility sitting, reduce number and cut down construction maintenance costs. However, it also decreases correlation spatial error affects real time performance effectiveness positioning. Thus, key techniques long range need to be further optimised. Ambiguity resolution is one most critical techniques. In this paper a divisional ambiguity for proposed, so as deal with fixed low success rate, especially elevation...

Setup computational fluid dynamics (CFD) model of the nasal cavity in patients with Crouzon syndrome analyze inspiratory airflow hydrokinetics its cavity. After changing morphosis structure by operation, compare preoperative and postoperative alteration field evaluate effect operation on physiological function ventilation.Eleven were underwent spiral computed tomographic laminar scanning to obtain DICOM data establish CFD model. The features static state phase simulated analyzed Fluent...

Abstract The ionospheric morphology responses to tropical cyclone passing over eastern Australia, named as Debbie in 2017, is investigated using Global Positioning System (GPS) Slant Total Electron Content (STEC), and characteristics by ionosonde. Based on the data analysis this study, some significant morphological of are identified follows. As GPS satellites PRN05 PRN20 observed Townsville station were near center at landfall time, their STEC values obviously increased. stronger...

In order to solve the problem of low precision tropospheric delay interpolation under long-distance sparse reference station, a method estimation based on support vector machine (SVM) theory was proposed. Firstly, troposphere assumed be an infinitely thin single-layer membrane, and with known information stations, puncture point coordinates zenith each station visible satellite in membrane were obtained. Then, taken as training samples optimize appropriate core parameters SVM establish model...

The ambiguity resolution (AR) and validation of the global navigation satellite system (GNSS) have been challenging tasks for some decades. Considering reliability problem extra-wide-lane (EWL) in triple-carrier (TCAR), a method validating EWL using single epoch was proposed BeiDou Navigation Satellite System (BDS). For initial ambiguity, obtained rounding estimator with geometry-free (GF) model, double-difference ionospheric delay first estimated to construct relative positioning model an...

This paper addresses the stabilization and optimization problem of networked control systems (NCSs) with long time delays. According to actual network conditions, delay is divided into fixed random delay. Then, controller constructed, where stabilizing parameters are obtained cone complementary linearization (CCL) approach optimizing solved estimation distribution algorithm (EDA) algorithm. Simulation results demonstrate effectiveness proposed methods.

Abstract In this article, 1‐octene and styrene was copolymerized by the supported catalyst (TiCl 4 /ID/MgCl 2 ). Subsequently, sulfonation reaction, sulfonated poly(1‐octene‐ co ‐styrene)s which were amphiphilic copolymers prepared. The copolymerization behavior between is moderate ideal behavior. Copolymers prepared contain appreciable amounts of both styrene. Increase in feed ratio styrene/1‐octene leads to increase content copolymer decrease molecular weight. As polymerization temperature...