Abstract Millimeter-wave(MMW) radar sensing is one of the most promising technologies to provide safe navigation for autonomous vehicles due to its expected high-resolution imaging capability However, driverless cars have higher request for different environment and light conditions. Therefore, millimetre-wave imaging is of paramount importance for complex load scenario. In this paper, we have built models of pavement pits and bulges and analysed their with differences ways of antennas. A comparison of the imaging performance of experimental systems operating at a MMW radar and a Lidar is presented with the analysis of features for initial image interpretation Experimental images of the complex road surface are made by a 94GHz frequency-modulated continuous-wave (FMCW) radar technique with 3mm wavelength.
In this paper, the effect of magnetic field annealing was investigated on the evolution of recrystallized texture of a cold-rolled pure copper sheet. During magnetic field annealing the transverse direction of the specimen was set to be parallel to the magnetic field. It was found, although, altering the orientation of the specimen to the magnetic field direction during annealing does not change the type of the recrystallized texture component, the intensity of cube texture in the specimen with field is higher than that without field.
The shock loading experiments on Ni 47 Ti 44 Nb 9 shape memory alloys were performed using the single stage gas gun under various shock conditions. The texture evolution of the shocked specimens was investigated. The results show that the initial sheet textures of {111} <[Formula: see text] > and {111} <[Formula: see text] > gradually evolve into {111} plane texture after shock loading. Meanwhile, a weak texture component {001} is also observed in all the shocked specimens, indicating that the recovery strains in shocked specimens decrease. Moreover, the evidence for the texture inheritance in the austenite and martensite phases of Ni 47 Ti 44 Nb 9 alloys was also provided in this present work.
The Bacillariophyceae is a species-rich, ecologically significant class of Bacillariophyta. Despite their critical importance in marine ecosystems as primary producers and in the development of harmful algal blooms (HABs), taxonomic research on Bacillariophyceae species has been hindered because of their limited morphological features, plasticity of morphologies, and the low resolution of common molecular markers. Hence molecular markers with improved resolution are urgently needed. Organelle genomes, which can be constructed efficiently with the recent development of high throughput DNA sequencing technologies and the advancement of bioinformatics tools, have been proposed as super barcodes for their higher resolution for distinguishing different species and intra-species genomic variations. In this study, we tested the value of full-length chloroplast genomes (cpDNAs) as super barcodes for distinguishing diatom species, by constructing cpDNAs of 11 strains of the class Bacillariophyceae, including Nitzschia ovalis, Nitzschia traheaformis, Cylindrotheca spp., Psammodictyon constrictum, Bacillaria paxillifer, two strains of Haslea tsukamotoi, Haslea avium, Navicula arenaria, and Pleurosigma sp. Comparative analysis of cpDNAs revealed that cpDNAs were not only adequate for resolving different species, but also for enabling recognition of high levels of genome rearrangements between cpDNAs of different species, especially for species of the genera Nitzschia, Cylindrotheca, Navicula and Haslea. Additionally, comparative analysis suggested that the positioning of species in the genus Haslea should be transferred to the genus Navicula. Chloroplast genome-based evolutionary analysis suggested that the Bacillariophyceae species first appeared during the Cretaceous period and the diversity of species rose after the mass extinction about 65 Mya. This study highlighted the value of cpDNAs in research on the biodiversity and evolution of Bacillariophyceae species, and, with the construction of more cpDNAs representing additional genera, deeper insight into the biodiversity and evolutionary relationships of Bacillariophyceae species will be gained.
The purpose of this study is to explore the impact of the difference in the transfer price of industrial land on the regional industrial transformation and upgrading under the "bid and auction" system. Research methods: panel data fixed effect model. Research results: Improving the differentiation of industrial land transfer price is conducive to regional industrial transformation and upgrading, and this conclusion has passed a variety of robustness tests. Research conclusions: First, formulate and improve the promotion of industrial land transfer price differentiation strategy. The second is to establish and improve the enterprise entry and exit mechanism to improve the efficiency of industrial land resource allocation. The third is to further improve the secondary market trading system of industrial land, and actively explore the circulation mechanism of stock industrial land to ensure the reasonable flow and efficient use of industrial land resources.
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