The basic idea of traditional scaling model measurement method uses electromagnetic similarity relation to realize scaling transformation. The electromagnetic similarity for a scattering problem ...requires that the electrical size kl remain constant and the target is a perfect electric conducting (PEC) model. In this paper, based on our previous work 8 and the proposed extended GTD (geometric theory of diffraction) model 9, we derive the scaling relation for the thinly-coated targets at the same frequency. The scaling relation is verified by simulation experiment. The results show that the thinly coated models conform to the new scaling relation under certain error conditions.
Driver attention prediction implies the intention understanding of where the driver intends to go and what object the driver concerned about, which commonly provides a driving task-guided traffic ...scene understanding. Some recent works explore driver attention prediction in critical or accident scenarios and find a positive role in helping accident prediction, while the promotion ability is constrained by the prediction accuracy of driver attention maps. In this work, we explore the network connection gating mechanism for driver attention prediction (Gate-DAP). Gate-DAP aims to learn the importance of different spatial, temporal, and modality information in driving scenarios with various road types, occasions, and light and weather conditions. The network connection gating in Gate-DAP consists of a spatial encoding network gating, long-short-term memory network gating, and information type gating modules. Each connection gating operation is plug-and-play and can be flexibly assembled, which makes the architecture of Gate-DAP transparent for evaluating different spatial, temporal, and information types for driver attention prediction. Evaluations on DADA-2000 and BDDA datasets verify the superiority of the proposed method with the comparison with state-of-the-art approaches. The code is available on https://github.com/JWFangit/Gate-DAP.
The basic idea of traditional scaling model measurement method is to use electromagnetic similarity relation to realize scaling transformation. The electromagnetic similarity for a scattering problem ...requires that the electrical size kl remain constant. In this paper, based on the concept of target scattering center, a new analytical expression of target scattering field with the electric size kl is derived, and then a new scaling relation and a scaling model measurement method are proposed. A simulation experiment validates the proposed model and scaling method.
Considering the distinct scattering characteristics observed in diverse frequency bands for terrain surfaces, the utilization of complementary information from multi-band PolSAR data proves ...advantageous in effectively distinguishing targets that may present challenges when assessed in isolation within a single band. In this study, we employ the polarimetric target decomposition methods to investigate the scattering characteristics of representative targets within the C and L bands. Based on these findings, we construct a random forest fine classification model specifically tailored for different types of urban vegetation. Notably, experimental results demonstrate a noteworthy enhancement in classification accuracy following the integration of multi-band data.
Hierarchical TiO sub(2) nanotube (HTNT) arrays assembled by anatase single crystal nanoparticles (NPs) were synthesized via in situchemical etching of anodic TiO sub(2) nanotube (TNT) arrays. The ...process starts with the fabrication of smooth and crack-free anodic TNT arrays by employing an improved anodization method, which is used both as the starting material and a template for the synthesis of HTNT. The as-fabricated HTNT retains the tubular array structure as in the original anodic TNT, and the walls of HTNT possess a porous structure, consisting of anatase TiO sub(2) single crystal NPs. The formation mechanism of the HTNT was thoroughly investigated, proposing that a dissolution-recrystallization procedure of the anodic TNT under in situchemical etching of hydrofluoric acid leads to the transformation from TNT arrays to HTNT arrays. Such HTNT structure has higher specific surface area and better crystallinity than the original anodic TNT, and possess one-dimensional passageways resulting in prominent advantages for the exchange and transportation of charge or mass, and could be an ideal candidate for many practical applications.
With the development of urban greening construction and the quick advance of modernization, there have been numerous high-altitude operations in a variety of fields, which are hazardous and have ...difficult working conditions. And in a variety of high-risk, high-intensity, highaltitude operations, climbing robots can take the place of humans. Climbing robots require strong endurance in order to complete high-altitude operations. This paper designs a high-altitude work robot, an inchworm-like climbing robot, based on the background and in combination with the research achievements in the field of climbing robots. This paper suggests an energy-optimal trajectory planning based on the IPSOIGSA joint algorithm for the two climbing gaits of the inchworm-like climbing robot in order to decrease energy consumption and increase endurance. According to the final simulation results, the intended trajectory uses less energy, the robot's motion is stable, and the impact and vibration are also within acceptable limits.
In order to improve the quality of the traditional exam management system test paper generation, joining the genetic algorithm of simulated annealing algorithm is put forward, and study at last on ...the automatic group volume algorithm update the topic the difficulty coefficient. By analyzing the simulation results, the algorithm can improve the efficiency and quality of the volume.
In 2009, an outbreak of dengue fever occurred in Yiwu, the major international market in Zhejiang province, China. A mosquito vector eradication program was undertaken using several insecticides to ...limit further transmission of the dengue virus. At the conclusion of this effort, the affected area was surveyed for dengue fever vector species, and mosquito-breeding area water samples were collected and analyzed for residual pesticide content. The survey detected the Asian tiger mosquito, Aedes albopictus (Skuse), in 19 villages in Yiwu, accounting for 51.7% of the mosquitoes in the 89 samples collected. Other species collected included Armigeres subalbatus (Coquillett), Culex pipiens quinquefasciatus Say, Cx. tritaeniorhynchus Giles, Cx. mimulus Edwards, and Anopheles sinensis Wiedemann. Analysis of water from 45 mosquito-breeding sites using gas chromatography-mass spectrometry detected a total of 7 pesticides, including the herbicide prometryn, 2 organophosphate insecticides (chlorpyrifos and triazophos), and 3 pyrethroid insecticides (cyhalothrin, cypermethrin, and permethrin). The maximum level of permethrin detected was 323.9 IJg/L in breeding waters in which Ae. albopictus and Ar. subalbatus coexisted.
