Weld Feature Extraction Based on Semantic Segmentation Network.

Laser welding is an indispensable link in most types of industrial production. The realization of welding automation by industrial robots can greatly improve production efficiency. In the research and development of the welding seam tracking system, information on the position of the weld joint needs to be obtained accurately. For laser welding images with strong and complex interference, a weld tracking module was designed to capture real-time images of the weld, and a total of 737, 1920 × 1200 pixel weld images were captured using the device, of which 637 were used to create the dataset, and the other 100 were used as images to test the segmentation success rate. Based on the pixel-level segmentation capability of the semantic segmentation network, this study used an encoder-decoder architecture to design a lightweight network structure and introduced a channel attention mechanism. Compared to ERF-Net, SegNet, and DFA-Net, the network model in this paper has a fast segmentation speed and higher segmentation accuracy, with a success rate of 96% and remarkable segmentation results.

Banana Peel-Derived Dendrite-Shaped Au Nanomaterials with Dual Inhibition Toward Tumor Growth and Migration.

PURPOSE: In order to prepare functional Au nanoparticles with low toxicity and high antitumor properties, we have used fruit waste (banana peel) to synthesize a new dendrite-shaped gold nanoparticle and used it for the treatment of tumors. METHODS: Dendrite-shaped gold nanoparticle (Au-dendrite) was synthesized through a facile hydrothermal process. The banana peel was used as both the reducing agent and the protective agent for reducing chloroauric acid to obtain Au-dendrite. The safety assessment of the Au-dendrite was conducted by H&E staining of the mouse's eyelid skin and CCK-8 assay. The antitumor effects were evaluated through in vitro tumor cytotoxicity experiments and in vivo treatment of animal tumors. RESULTS: In this work, a new type of gold nanomaterial (Au-dendrite) was synthesized by using a common agricultural waste (banana peel) through a facile hydrothermal process without any extra chemical reducing agent or protective agent. Subsequent experiments showed that, compared with some classical Au nanomaterials, the as-synthesized gold nanocomposites have superior biocompatibility and impressive characteristics of dual inhibition toward tumor growth and migration. CONCLUSION: We successfully synthesized a dendrite-shaped gold nanocomposite which was derived from a common agricultural waste (banana peel). A facile and environmentally friendly synthetic process was proposed accordingly without regular chemical additives. The as-prepared Au-dendrite nanocomposites not only had better biocompatibility than some classical gold nanoparticles but also exhibited unique advantages in tumor inhibition.

Dual layered wound dressing with simultaneous temperature & antibacterial regulation properties.

Scald first-aid needs to reduce the local temperature as well as the bacterial colonization. Bacteria resistant problem has become a major challenge that global public health workers face. Long-term and high dosage use of antibacterial agents is the main reason. In this study, temperature-regulated release antibacterial nanoparticles were applied to poly(n-isopropyl acrylamide) and sodium polyacrylate. This hypothermia coverage could be used as an ideal scald first-aid wound dressing with spontaneous Temperature & Antibacterial regulation properties.

"The return of ceramic implants": Rose stem inspired dual layered modification of ceramic scaffolds with improved mechanical and anti-infective properties.

Nowadays, traditional ceramics for bone implants have considerably replaced by metal based biomedical materials, attributing to the friability of ceramics. However, ceramic implants possess excellent biocompatibility and longtime abrasion resistance. They should be more desirable for long-term uses of implants in case their fragility had been overcome. In the present work, inspired from natural rose, a dual-layer-modified ceramic scaffold was constructed by coating a superplastic layer of isocyanate (ISO) resin and a nano Zinc Oxide (nano-ZnO) layer on the ceramic scaffold. The ISO resin modification layer with 1 mm thickness, improved the mechanical properties of ceramic implants 2-3 times, and protect the ceramic implants from broken even drop from 1 m high. Moreover, such dual layered modification exhibited broad spectrum antibacterial behavior. In vivo biocompatible studies demonstrated that there was no obvious noticeable tissue damage in all major organs of mice after the implant surgeries.

A highly efficient, low-toxic, wide-spectrum antibacterial coating designed for 3D printed implants with tailorable release properties.

Herein, a highly customized and broad-spectrum antibacterial implant was prepared through the combination of 3D printing technology and surface nano-modification. The antibacterial coating, which consists of the film-forming agent polyvinyl alcohol (PVA), polyethylene acid (PAA), and green-synthesized silver nanoparticles (Ag-NPs), was modified on the surface of a 3D-printed implant. The small-sized Ag-NPs (<10 nm) showed potent broad spectrum activity and good biocompatibility in relatively low concentration. Moreover, through changing the content of the Ag-NPs and the proportion of PVA and PAA, the loadings and release rate of Ag-NPs could be controlled according to actual requirements, achieving the goal of precise treatment. Animal experiments demonstrated that the implant system exhibited superior anti-infection performance, which could effectively reduce the postoperative infection risk of implant materials, consequently promoting the practical process of 3D printed implants.

The first visually observable three-mode antibiotic switch and its relative 3D printing assisted applications.

The first visible three-mode switchable antibiotic nanocomposite, including "Packaged" (low toxicity and high stability), "On" (potent antibacterial activity, including drug-resistant strains) and "Off" (easy separation) modes, was synthesized to address several problems caused by antibiotic abuses. Some potential applications were discussed by using animal experiments and 3D printing separately.