Rice lodging severely affects harvest yield. Traditional evaluation methods and manual on-site measurement are found to be time-consuming, labor-intensive, cost-intensive. In this study, a new method for rice assessment based on deep learning UNet (U-shaped Network) architecture was proposed. The UAV (unmanned aerial vehicle) equipped with high-resolution digital camera three-band multispectral synchronously used collect lodged non-lodged images at an altitude of 100 m. After splicing...

For the wind speed prediction, many researchers have established prediction models based on machine learning methods, statistical and theoretical that is, direct methods. However, method cannot be widely used in direction because has strong randomness uncertainty. In order to solve this problem, paper proposed a method, indirect method. Specifically, is decomposed into crosswind alongwind considering correlation between direction. The are predicted long short-term memory (LSTM) model with...

The confining pressure has a great effect on the internal force of tunnel. During construction, which crucial impact tunnel construction changes due to variation groundwater level and applied load. Therefore, safety tunnels must have magnitude accurately estimated. In this study, complete time axis was obtained through high-frequency field monitoring, data are segmented into training set testing set. Using GRU RNN models, prediction model established, results were analyzed. indicate that...

The isomerization dynamics of cis-stilbene in the first excited singlet state were studied by technique fluorescence upconversion. Lifetime measurements made with subpicosecond resolution 2-propanol, decanol, n-hexane, and tetradecane. decay curves are single exponential all solvents except for where they adequately described a double exponential. A weak viscosity dependence times is observed both alcohols alkanes. These results discussed terms Bagchi, Fleming, Oxtoby theory [J. Chem. Phys....

In order to obtain scaffold that can meet the therapeutic effect, researchers have carried out research on irregular porous structures. However, there are deficiencies in design method of accurately controlling apparent elastic modulus structure at present. Natural bone has a gradient structure. few studies mechanical property advantages bionic scaffold. this paper, an improved based Voronoi-tessellation is proposed. The get controllable scaffolds fit natural bone, and control structure,...

Facile fabrication, low material complexity and closed-loop recycling are essential for polymer plastics to alter their linear product economy towards a cradle-to-cradle one. Covalent adaptable networks (CANs) one way achieve that, which intrinsically exhibit decent mechanical properties like the thermosets but could also be easily recycled thermoplastics. In this work, we introduce rigid ester structural motifs into dynamic poly(disulfide)s form series of dual networks. Owning coherence...

Crack inspection is a crucial but labor-intensive work of maintenance for in-service bridges. Recently, the development fully convolutional network (FCN) provides pixel-wise semantic segmentation, which promising as means automatic crack detection. However, demand numerous training images with labels poses challenges. In this study, benchmark data set called bridge library (BCL) containing 11,000 labeled 256×256 resolution was established, has 5,769 nonsteel images, 2,036 steel 3,195 noise...

Rapid and accurate assessment of the damage to bridge structures after an earthquake can provide a basis for decision-making regarding post-earthquake emergency work. However, traditional structural inspection techniques are subjective, time-consuming, inefficient. This paper proposed framework rapid condition by integrating technologies satellite, unmanned aerial vehicle (UAV), smartphone with deep learning approach. The images components bridges be obtained UAVs smartphones. Furthermore,...

The construction of large-diameter shield tunnels underwater involves complex variations in water and earth load outside the tunnel segment, as well intricate mechanical responses. This study analyzes variation laws external loads, axial forces, bending moments acting on segment ring during assembly removal from tail. It accomplishes this through establishment an on-site monitoring system based Internet Things (IoT) proposes a Bayesian-genetic algorithm model to estimate pressure....

Cables are important components of long‐span bridge structures, whose operation is significantly affected by cable force changes. Nowadays, testing performed physical methods; that is, sensors installed on the structure to monitor its Obviously, this strategy requires an extensive amount time achieve calculation, which makes it impossible in real time. Meanwhile, smartphones have attracted attention field structural health monitoring (SHM) because their higher cost‐effectiveness than...

The goal of double carbon reflects the new goals and requirements China's entry into a development stage. In this regard, construction industry, as large producer emissions, should focus on emission reduction. whole life cycle buildings, intensity in physicochemical stage is largest, so we Compared with cast-in-situ concrete floor slab, bidirectional prestressed precast hollow slab (BPPHS) has characteristics environment-friendly under condition meeting building stress, manufacturing process...

The severe global warming driven by the large-scale emission of greenhouse gases has made reduction carbon emissions a critical priority for economic and social development. Among various sectors, construction industry stands out due to its significant consumption natural resources throughout building process, resulting in considerable environmental burden. In China, from account approximately 40% total emissions. Therefore, mitigating this sector is utmost importance. This study develops an...

The isomerization of t-stilbene (stilbene h12 ) and three deuterated derivatives has been studied in a supersonic expansion, the thermal gas phase, solution. In jet we find that almost all effect full deuteration d12 is produced by two ethylinic hydrogens only d2 ). Complete phenyl rings d10 rather little influence on decay jet-cooled molecule. Nonexponential decays are found at intermediate excess energies system, with degree nonexponentiality decreasing increasing energy. ordering rates...