Extraction of maize growth stages in the Sanjiang Plain of China from 2003 to 2022 and their spatio-temporal changes in response to meteorological variables.

How to quickly monitor the growth process of maize on a large scale is crucial for regional maize growth assessment, yield estimation, and farmland management. This article takes the Sanjiang Plain in Northeast China as the research area, which is the main grain production area in China. Using MODIS NDVI time series data and Savitzky Golay and Whittaker filtering techniques, a remote sensing extraction method for key growth stages of maize (i.

Bird habitat network construction in Shenyang City based on improved circuit theory of neighborhood landscape compatibility.

Constructing urban habitat networks can effectively improve the stability of regional ecosystems, increase energy flow and gene exchange in landscape patches, and play a crucial role in urban biodiversity conservation. With urban area of Shenyang City as the study area, we identified the source of bird habitats from three dimensions: morphology-quality-neighborhood. From the three dimensions of environmental elements, architectural index, and anthropogenic interference, we superimposed 12 resistance factors to construct resistance surfaces.

Low-order digital controller design based on l parametric stability margin.

The uncertainties inherent in engineering control systems are generally intricate and multifaceted. Sometimes, the model parameters of the plants may even fluctuate significantly. To address this undesirable scenario and ensure system stability under such conditions, the controller parameters with the largest parametric stability margin in the stabilizing set should be selected.

Study on Fatigue Crack Propagation Behavior of Fiber/Al-Li Laminates Under Typical Overload.

Fiber metal laminates are applied in aerospace equipment due to their excellent crack propagation performance. However, during the service process of fiber metal laminates, the coupling between overload effect and fiber bridging effect makes the crack propagation behavior complex, which makes it difficult to predict. Addressing this issue, the fatigue crack propagation behavior of Fiber/Al-Li laminates under typical overload conditions was analyzed and predicted in this paper.

Quantifying the impact of urban sprawl on vegetation productivity through neighborhood substitution considering environmental similarity.

Urban sprawl can reduce vegetation cover and degrade vegetation net primary productivity (NPP), which plays a crucial role in urban ecosystems. However, large uncertainties remain in quantifying the impact of urban sprawl on NPP caused by models and available data. This paper proposed a newly model, i.

Stretchable adhesive eutectic organohydrogel based on gelatin-Quaternized chitosan for wearable human motion monitoring.

Hydrogels are promising materials for flexible wearable electronics, yet their low adhesiveness, poor environmental stability, and weak mechanical properties limit practical applications. Herein, we design a multi-network eutectic organohydrogel based on a deep eutectic solvent (DES) composed of choline chloride (ChCl) and acrylamide (AM), enhancing solubility and stability. Radical polymerization of AM forms a polyacrylamide (PAAM) network, which integrates with gelatin (Ge) and quaternized chitosan (QCS) to establish Ge-PAAM and QCS-PAAM networks.

Magnetic continuum robot-mediated intracranial delivery of peptide nanophotosensitizers for glioblastoma photodynamic therapy.

Effective treatment of glioblastoma (GBM) remains a significant clinical challenge. Although photodynamic therapy (PDT) is a promising anticancer treatment method, its clinical application in GBM is limited by poor light penetration through the skull and insufficient drug delivery across the blood-brain barrier (BBB). Here, an innovative magnetic continuum robot (MCR)-mediated intracranial PDT strategy is proposed.

Spatial optimization of hierarchical healthcare facilities driven by multi-source data: a case study of Shenyang, China.

Amid rapid urbanization and accelerated population aging, spatial inequality in the distribution of healthcare facilities has become a pressing challenge in Shenyang. The dual problem of overconcentration of high-level medical resources in the urban core and insufficient primary care provision in peripheral areas highlights systemic imbalances in healthcare equity and efficiency. Grounded in the concept of spatial equity, this study integrates multi-source data-including population statistics, facility locations, and transportation networks-using advanced spatial analysis and big data fusion techniques.

How to enhance photocatalytic efficiency for tetracycline degradation in natural aquatic environments using oxygen-vacancy-modified BiOI/BiOBr Composites: coupling DFT simulations with experiments.

Oxygen vacancies could be induced into the heterojunction structure of BiOI/BiOBr via high-temperature calcination. Light absorption, charge transfer efficiency, photocatalytic activity, and mechanism are all intimately connected to oxygen vacancies. Density-functional theory simulations demonstrate that surface oxygen vacancies adsorb oxygen to active sites, whereas bulk oxygen vacancies activate oxygen adsorbed to the surface to reactive radicals.

Determination of intrinsic cellular electrical and mechanical properties using micro/nano manipulation techniques.

Single-mode biophysical fingerprints have specific overlap when cell heterogeneity is analyzed. The cross-sensitivity between these parameters results in significant fuzzy intervals in cell phenotype classification based on one-dimensional features, making it difficult to accurately separate cell clusters with similar biophysical characteristics but different functional subgroups. Therefore, developing cross-scale multi-modal synchronous detection technology for live cell parameters and building a machine learning-based multi-dimensional parameter coupling analysis model will be a key path to breaking through the bottleneck in the accurate analysis of cell heterogeneity.

Cooperative effect of NH on anaerobic ammonium-oxidizing bacteria and heterotrophic bacteria and the underlying mechanism.

Batch experiments investigated cooperative nitrogen removal between anaerobic ammonium-oxidizing bacteria (AnAOB) and heterotrophs under hydrazine (NH) and sodium acetate effects. A single addition of sodium acetate (optimal C/N = 2) or NH (1 mg/L) achieved peak total nitrogen removal efficiency of 89.74 and 79.

Spatial correlations between cultural ecosystem services and human activities along the Shenyang's Hun River corridor.

Understanding the spatial interdependencies between cultural ecosystem services (CES) and human activity intensity (HAI) is critical for reconciling sustainable urbanization with ecological resilience. This research endeavors to conduct an exhaustive analysis of the spatial patterns between CES and HAI along Shenyang's Hun River corridor, as well as to explore the interrelationships between these two factors. Multi-source geospatial and socioeconomic data, spatial statistical analysis software provided initial data and technical support for this research.

The recovery mechanism of granular sludge fragmentation and re-granulation caused by long-term high-concentration organic matter erosion in the SAD process: performance, sludge evolution, and metagenomic sequencing.

The Simultaneous Anammox and Denitrification (SAD) process effectively removes organic carbon sources, the impact of high-concentration carbon sources on the SAD process remains unclear. This study investigated the performance, sludge characteristics, microbial community correlations, and metagenomic sequencing of the SAD system under conditions of excessive organic matter exposure. The results showed that the organic matter metabolism ability of SAD granular sludge increased from 90.

Enhancing anaerobic digestion performance of food waste through direct interspecies electron transfer via conductive materials.

To enhance the anaerobic digestion efficiency of food waste, this study investigated the effects of four conductive materials, including granular activated carbon (GAC), powdered activated carbon (PAC), magnetite (FeO), and hematite (FeO), on direct interspecies electron transfer (DIET). Results indicated that all four conductive materials enhanced the digestion performance. PAC at 10 g/L exhibited the best performance, achieving a methane yield of 308 mL/g volatile solids (VS), 12.

Mapping the Relationship Between Diffusion Characteristics of Warm-Mix Recycled Asphalt on Molecular Dynamics (MD) and High-Low Temperature Properties of Mixtures.

Warm-mix recycled asphalt (WMA-R) technology for reclaimed asphalt pavement (RAP) significantly reduces energy consumption and environmental pollution while maintaining the performance of asphalt mixtures. Significant progress has been made at home and abroad in evaluating the impact of regenerated asphalt mixtures on the performance of regenerated asphalt. However, the performance improvement of WMA-R depends on the effective diffusion of regenerated agents and their interaction mechanism with aged asphalt, which has not been fully studied.

System characteristics of integrated continuous flow simultaneous partial Nitrification, Anammox and Denitrification (SNAD) for NH-rich wastewater: performance, sludge evolution, metagenomic sequencing analysis.

The integrated process of simultaneous partial nitrification, anammox, and denitrification (SNAD) is designed to achieve efficient nitrogen removal and carbon reduction. This study details the design and successful implementation of an innovative, single-piece continuous flow SNAD system for treating high concentration NH wastewater. The system leverages simultaneous anammox and denitrification (SAD) granular sludge and employs a strategy of dosing partial nitrification sludge, alongside meticulous control of pH, dissolved oxygen (DO), free ammonia (FA), and free nitrous acid (FNA) was applied to initiate the SNAD process.

Resilient invaders: The exotic species' role in mitigating microplastics and perfluorooctanoic acid pollution.

Does the vector role of invasive species exacerbate the stress risks posed by emerging contaminants during the process of biological colonization? In this study, a 21-day mesocosm experiment was conducted to investigate the effects of polystyrene microplastics (PS) and perfluorooctanoic acid (PFOA) on the invasive potential, photosynthesis, and water purification capacity of the exotic submerged plant Elodea canadensis. The results demonstrated that PS-PFOA composite pollution exhibited significant synergistic toxic effects, primarily by inhibiting photosynthetic efficiency, disrupting nitrogen metabolism, and exacerbating oxidative stress. This study identified a unique compensatory growth mechanism: exposure to PS (10 mg/L) and PFOA (20 μg/L) significantly increased chlorophyll b (20.

Soundscape and its context: A framework based on a systematic review.

Theoretical and empirical research has consistently highlighted the significance of context in understanding and evaluating soundscapes. Despite this, the concept of "context" in soundscape studies remains ambiguously defined, and the indicators employed in these studies are often inconsistent. Consequently, a systematic understanding of the soundscape-context relationship is needed.

The untranslatability of environmental affective scales: insights from indigenous soundscape perceptions in China.

Soundscapes significantly impact human well-being, yet standard Western-based Soundscape Affective Quality (SAQ) scales may not accurately represent culturally specific perceptions. This study explored structural differences in soundscape emotional experiences between Chinese and Western cultures using an indigenous approach. An Indigenous Chinese SAQ (ICSAQ) scale was developed through perceptual evaluations of 132 representative Chinese soundscape excerpts by 264 participants from 30 provinces, employing 108 culturally relevant descriptors.

Enrichment Mechanism of Organic Matter in the Marine-Continental Transitional Shale of the Taiyuan Formation in Ordos Basin, China: Control of the Paleoenvironment.

With the growing recognition of substantial exploration potential in transitional shale gas, increasing attention has been directed toward organic-matter-rich transitional shale. Although previous studies have primarily examined the characteristics of organic matter, basin depositional environments, and individual geochemical parameters, detailed analyses of depositional microfacies remain limited. Furthermore, the integration of geochemical analyses with sedimentological characteristics has been insufficient, leading to a limited understanding of the factors controlling the organic matter enrichment in transitional shale.

Design of Atomic Force Microscope Photoelectric Sensing Circuit Based on Kalman Filter.

The noise performance of photoelectric sensing circuits hinders the performance development and intelligent application of atomic force microscopy systems. This article successfully developed an atomic force microscope photoelectric sensing circuit based on Kalman filtering. This article embeds the Kalman filter algorithm into the photoelectric sensing circuit to filter and denoise the output signal.

How bis-pyridine N cellulose aerogels highly selectively adsorb Cu from acidic wastewater: An experimental, molecular dynamics and density functional theory investigation.

To evaluate the potential of aerogel materials for selectively recovering Cu from highly acidic wastewater, the adsorption behavior of Cu by bis-pyridine N-functionalized cellulose (PEIPD/CMC) aerogel was systematically investigated. Characterization of structural and chemical properties of the absorbent revealed that the bis-pyridine N plays a crucial role in the adsorption process. The PEIPD/CMC aerogel exhibited excellent adsorption capacity and selectivity for Cu in multi-component acidic solutions (Cu/Zn/Pb), achieving a maximum adsorption capacity of 1.

Removal of organic matter and ammonia nitrogen from contaminated water by combining hydrotalcites pretreatment and ultrafiltration.

In this study, the combined process of hydrotalcite and ultrafiltration was investigated for the treatment of micro-polluted water samples. The study examined the impact of the combined process on the elimination of Total Organic Carbon (TOC) and ammonia nitrogen, varying the dosage of hydrotalcite, the duration of adsorption, and the volume of ultrafiltration backwash water. The experimental outcomes were subjected to analysis.

Research on the influence of the visual perception characteristics of fitness trail landscape space based on psychological perception: a case study of Hunnan District, Shenyang, China.

Based on the multidisciplinary method of collaborative psychology, sociology and environmental design research, this study conducts a quantitative study on the relationship between the visual perception of fitness trail landscape space and the psychological perceptions of fitness activities, providing data-driven references for the design of fitness trials. First, self-image acquisition is used to form a fitness trail landscape space image material library including 646 pictures. Second, we identify the user preferences for the composition of the main landscape elements of fitness trails, with subsequent research focusing on the top two preference combinations, namely, "plant-plant" and "plant-water.

Acoustic Moiré Flat Bands in Twisted Heterobilayer Metasurface.

Twisted bilayer systems enable a fundamental platform for engineering novel physical phenomena, such as topological phase transitions, polaritons, flat bands, and superconductivity. However, previous reports mainly focused on homobilayer structures, where each layer has identical configurations. In this work, a twisted heterobilayer (tHB) metasurface with strong anisotropy is presented.