With the rapid expansion in number of Unmanned Aircraft Vehicles (UAVs) available and development modern technologies, commercial applications UAVs urban areas, such as remote sensing (RS), express services, road traffic monitoring, police security, air shows so on, have increased greatly. However, most UAVs, especially light small civil been operating low-altitude airspace, a conflict may exist between increasing limited low airspace. To promote airspace resource to standardize operation...

Abstract Solar cells comprising earth‐abundant and non‐toxic elements with applicable bandgaps high absorption coefficients have attracted considerable interest over the past several decades are important devices for addressing future demand clean renewable energy. Antimony sulfide (Sb 2 S 3 ) crystal material effectively meets these requirements owing to its suitable bandgap, coefficient, electron hole mobilities, earth abundance, excellent stability. Solution‐processed Sb films essential...

Driven by recent technological breakthroughs, the electric vertical take-off and landing (eVTOL) aircraft has gained considerable attention. The widespread demand for eVTOL can be attributed to their potential use in commercialisation of urban air mobility (UAM) low-altitude airspaces. However, airspace environment is complex. UAM a high traffic density specifications are not uniform. Particularly commercial scenarios, controlling ensuring safety UAMs two major problems that should addressed...

Core Ideas The CERES‐Maize model was applied to estimate the impacts of climate change under RCP scenarios and effectiveness three typical adaptation measures for maize production in Northeast China. Maize yield would decline future climatic conditions if no were adopted. Changing planting dates, switching later‐maturing cultivars breeding new could mitigate negative varying degrees. China (NEC) is an important region ( Zea mays L.) China, country's most significant commercial food base....

Abstract Porous hydrogels have been developed to be highly efficient interfacial solar vapor generation materials for obtaining affordable freshwater supplies. However, realizing hydrogel with portability, adequate water supply, and durable mechanical properties remains challenging. Herein, a scalable portable 3D‐shaped recovery, transport, robust stability is reported, which prepared by foaming polyvinyl alcohol (PVA) modification of phosphotungstic acid (PTA). Due the interconnected porous...

Antimony selenosulfide (Sb

Understanding how different climate factors interact and impact rice yield is essential for effective agricultural management strategies policies. However, the potential impacts are less clear at regional scale. In this work, we used latest version of ORYZA crop model to evaluate change carbon dioxide (CO 2 ) on yields in Sichuan Basin China based high‐quality experimental, meteorological soil data incorporation future generated by five general circulation models (GCMs) under three newly...

Abstract Climate change will inevitably continue for the next few decades and have an impact on climate-sensitive agricultural production, emphasizing need to design effective adaptive strategies cope with climate risk or take advantage of potential climatic benefits. In this study, latest version Crop Environment Resource Synthesis-Rice (CERES-Rice) model was applied assess impacts carbon dioxide (CO 2 ) fertilization rice yield, as well effectiveness two popularly adopted measures in Hunan...

With the rapid increase in unmanned aerial vehicles (UAVs), ensuring safety of airspace operations and promoting sustainable development systems have become paramount concerns. However, research dedicated to investigating population exposure risks UAV urban areas their spatial pattern is still missing. To address this gap, study evenly divides space into uniform grids calculates critical for two types within each grid. By integrating geospatial data, including buildings, land use,...

Abstract Floods occur frequently, impacting large areas, displacing thousands of people and causing great losses. Unmanned Aerial Vehicle (UAV) remote sensing is easy to obtain high‐resolution image that immensely helpful timely assess the flood situation provide scientific decision‐making for emergency rescue. The important roles UAV have been widely recognized. However, sudden onset floods lack resources deployed nearby restricted rapid response UAVs in A observation network on a regional...

Augmented Reality (AR) technology visualizes virtual objects in the real environment, offering users an immersive experience that enhances their spatial perception of objects. This makes AR important tool for visualization engineering, education, and gaming. The Unmanned Aerial Vehicles’ (UAVs’) low-altitude public air route (Skyroad) is a forward-looking transportation infrastructure flying over complex terrain, presenting challenges user due to its invisibility. In order achieve 3D...

A scheme to measure temperature distribution inside a gain medium of diode-pumped solid-state laser is proposed based on the fluorescence intensity ratio technique. By recording temperature-dependent upconversion related H11/22→I15/24 and S3/24→I15/24 transitions Er3+, real-time an Er3+:Yb3+:LuAl3(BO3)4 crystal end-pumped by 976 nm diode can be measured while 1.55 μm operating. Influences pump power, output mirror transmissivity are investigated. This conveniently accurately along path in...

Urban logistics is an important research topic in human and economic geography; unmanned aerial vehicles (UAVs) are emerging technology that has huge potential the field of with release control restrictions on low-altitude airspace. The scientific identification spatial pattern impact factors UAV networks greatly significant regards to planning scheduling. This study considered urban network Hangzhou 2020 as used kernel density estimation, a geodetector, geographic information system (GIS)...

Increasing numbers and industrial applications for UAVs acquire much airspace low-altitude flights. However, unknow changeable environment has hindered UAVs' rapid development. To enable flight safely legally at low-altitude, this paper proposed a concept of "low-altitude public air route network (LAPAR)" presented key technologies. Specifically, Firstly, four-level system were proposed; Secondly, consisting various constraints UAV flights, such as climate, buildings, communication mountains...

Efficient path-planning is necessary to ensure safety and reliability for UAV's flights. However, existing path-searching algorithms are difficult meet the high-efficiency-requirement path planning in three-dimension situation. Therefore, this paper proposed a new three-dimensional method using improved Ant Colony Optimization (ACO) algorithm fine hierarchical stratification. Firstly, we constructed spatial gridding map grid discrete based on high-precision geospatial data. Secondly,...

Abstract Background : The factor structure and invariance of the Multidimensional Anxiety Scale for Children (MASC) yield mixed results in extant research, underscoring need robust anxiety assessment tools. This is critical understanding rising prevalence among adolescents. Moreover, longitudinal studies examining research focusing on adolescents are scarce. Our study aims to assess MASC its temporal population over a three-month period Methods A cohort 924 (mean age = 16.27 years, including...

Background: Valid and reliable measures of depressive symptoms are crucial for understanding risk factors, outcomes, interventions across rural urban settings.Despite this need, the longitudinal invariance these over time remains understudied.This research explores structural components Center Epidemiological Studies Depression Scale (CES-D) examines its consistency various living environments temporal stability in a cohort Chinese teenagers.Method: In initial phase, 1,042 adolescents...

A simple and effective 2D MXene-based carrier collector strategy is developed to improve the photoresponsivity of CdS/PbS heterojunction photodetector in an ultra-wide band (UWB) from ultraviolet (UV) short-wavelength infrared (SWIR) range, where all films were sequential hetero-integrated via a facile full-solution-processing route. The optimized devices yield significantly enhanced photoresponse whole detection region 349 2000 nm, showing maximum responsivity 1.7 1.8 A·W <sup...

Abstract Antimony selenosulfide (Sb 2 (S,Se) 3 ), featuring large absorption coefficient, excellent crystal structure stability, benign non‐toxic characteristic, outstanding humidity and ultraviolet tolerability, has recently attracted enormous attention research interest regarding its photoelectric conversion properties. However, the open‐circuit voltage ( V oc ) for Sb ‐based photovoltaic devices is relatively low, especially device with a high power efficiency η ). Herein, an innovative...