ABSTRACT This study aims to determine the floristic characteristics of alien invasive seed plant species (AISPS) in China. There are a total five hundred and thirteen AISPS, belonging seventy families two eighty-three genera. Seventy were classified into nine areal types at family level, "Cosmopolitan" "Pantropic" main types. Two genera twelve genus "Pantropic", "Trop. Asia & Amer. disjuncted", three These results reveal certain degree diversity among AISPS The level exhibit strong...

The automatic detection of aircrafts from SAR images is widely applied in both military and civil fields, but there are still considerable challenges. To address the high variety aircraft sizes complex background information images, a new fast framework based on convolution neural networks proposed, which achieves rapid with accuracy. First, airport runway areas detected to generate mask rectangular contour whole generated. Then, deep network proposed this paper, named Efficient Weighted...

In this study, we propose a novel device, the coaxial cross double-twisted tape and vortex generator (CV), to significantly enhance heat transfer performance of high-viscosity lubricating oil. Based on numerical simulation results, thoroughly analyze thermal–hydraulic behavior oil within enhanced pipe. We explore four distinct geometrical configurations CV. Among them, particular variant, CVCP, achieves most remarkable enhancement in performance. To further understand characteristics CVCPs,...

To address the challenge of heat transfer enhancement in condensation steam with non-condensable gases on a vertical wall under natural convection conditions, an improved boundary layer model coupled multi-physics field was proposed this paper, and traditional theoretical limitations were broken through by innovations. The particle swarm optimization algorithm first introduced into solution layer, convergence difficulty laminar–turbulent transition region infinite conditions overcome. A...

The effects of anthropogenic nitrogen (N) deposition on successful plant invaders, particularly potential their leaf functional traits, have stimulated considerable research interest.This study aims to gain insights into the traits controversial invader Rhus typhina in presence a gradient simulated N (control, 0 g L -1 ; low N, 5 medium 10 and high 25 ).Soil pH is decreased under growth R. typhina.The soil acidifi cation mediated by may be due positive ammonium concentration negative nitrate...

The increasing degree of plant invasion is an expanding problem that affects the functioning and composition forest ecosystems with anthropogenic activities, particularly soil nitrogen (N) cycles. Numerous studies have revealed one main factors for successful plants could pose significant effects on N cycles via direct and/or indirect ways, such as changes in microbial communities, litter decomposition rates, physicochemical properties. We thereby summarize ecological invasive cycles,...

Plant invasion succeeds because of such invader characteristics as fecundity and high-efficiency multiple reproduction modes.The acquisition individual resources the benefits fitness are driven by optimum patterns life history trade-offs reproductive allocation (RA) in plants, variations RA strategy play an key role plant adaptation to environmental changes.Thus determining invasive plants is important for understanding successful mechanism underlying invasion.This study aims determine two...

This study aims to determine the functional traits and reproductive allocation (RA) strategy of invasive plant Conyza canadensis across different invasion degrees along a latitude gradient in China.Invasion degree did not affect RA C. significantly.The high proportion biomass (allocating approximately 20% total into behaviors) can achieve fitness advantage broadening its habitat niches eventually attain successful invasion.The higher warm temperate subtropical monsoon climatic zones may play...

The differences in leaf functional traits between invasive and native species are considered to be closely linked the mechanisms underlying successful plant invasion because co‐occurring experience similar or even identical environmental selective pressures. This study aims determine resource‐use strategy invader Rhus typhina Sapindus mukorossi . Leaf chlorophyll nitrogen concentrations, specific area (SLA), moisture of R. were significantly higher than those S. , but length, width,...

The morphological features of plants, such as leaf functional traits, are adaptations that enable them to live under different environmental conditions.Thus, traits can provide a link between various factors and functions.This study aims gain insights into the differences in healthy (no insect attack) damaged (serious Cerasus yedoensis Yü li.Petiole diameter, length, thickness, ratio length petiole shape index, single wet dry weight leaves were significantly higher than those leaves, but...

This study aims to gain insights into the allelopathic effects (by using leaf extracts) of notorious invasive Solidago canadensis L. on seed germination associated Pterocypsela laciniata (Houtt.) C. Shih under different nitrogen (N) forms added: inorganic (NO3--N and NH4 -N), organic (urea-N), mixed N (a mixture three at 1:1:1 ratio). Among two used concentrations S. extracts higher exhibited inhibitory seedling height biomass, potential, index, vigor index P. laciniata. demonstrated...

Shell-and-tube heat exchanger (STHX) is widely used by virtue of its simple structure and high reliability, especially in a space-constrained surface ship. For the STHX ship, roll, pitch other motion ship will affect transfer performance, resistance characteristics structural strength exchanger. Therefore, it urgent to carry out numerical simulation research on three-dimensional thermal hydraulic under marine conditions. In this paper, shell tube was carried using porous media model....

Background: Soil N2-fixing bacterial (SNB) communities may play a vital role in plant invasion. Two or more invasive species (invaders) coexist the same ecosystem. Thus, it is important to assess effects of co-invasion on SNB elucidate ecological mechanisms invasion.Aims: The two co-occurring invaders (Erigeron annuus and Solidago canadensis) with different coverage classes were evaluated via comparative study.Methods: assessed using high-throughput sequencing approach.Results: invasion E....

Some invasive species can trigger shifts in soil microbial communities their rhizosphere to facilitate the invasion process. Meanwhile, some display different cover classes invaded ecosystems and even cross many climatic zones. This study aims address effects of notorious Conyza canadensis with along a gradient China on bacterial communities. All C. increased Shannon's diversity index abundance‐based coverage estimator (ACE) but decreased operational taxonomic richness Good's communities,...

Tactic analysis is a major issue in badminton as the effective usage of tactics key to win. The tactic defined sequence consecutive strokes. Most existing methods use statistical models find sequential patterns strokes and apply 2D visualizations such glyphs charts explore analyze discovered patterns. However, badminton, spatial information like shuttle trajectory, which inherently 3D, core tactic. lack sufficient awareness largely limited badminton. In this work, we collaborate with domain...