SEISMIC DAMAGE FIELD OBSERVATION AND VULNERABILITY ANALYSIS OF MULTILAYER REINFORCED CONCRETE FRAME STRUCTURE

To research the seismic damage characteristics, mechanism and vulnerability of multi-storey reinforced concrete (RC) frame structures, statistics and analysis, were made on 930 RC frame structures in Dujiangyan during Wenchuan earthquake, China. Firstly, seismic damage of RC frame structure in Dujiangyan is investigated comprehensively. According to the investigation results, easily damaged locations of this kind of structural system are: infilled wall, frame column, beam-column, joints and stairs. However, a large number of RC frame structures are basically intact or slightly damaged. By using the method of numerical statistical analysis, the non-linear relationship model and the fitting curve of seismic damage investigation samples under multiple seismic damage grades are given. Considering the number of stories, multiple ages and seismic fortification influencing factors, the empirical seismic damage situation of structures under each factor is analyzed, and the non-linear regression curve is developed. The empirical seismic vulnerability matrix and continuous regression function model and curve of RC frame structure in multi-intensity region are established. A calculation model of mean seismic damage index (MSDI) is proposed, and the vulnerability matrix and regression curve based on this parameter are given in combination with the empirical seismic damage investigation data. The above research results can provide a basic reference for vulnerability analysis and intensity scale revision of RC structures

5-(2,3,4,5,6-Penta­fluoro­phen­yl)-1,3,4-thia­diazol-2-amine

The title compound, C8H2F5N3S, was synthesized by the reaction of perfluoro­benzoic acid and thio­semicarbazide. The dihedral angle between the thia­diazole and perfluoro­phenyl ring is 35.41 (6)°. In the crystal, inter­molecular N—H⋯N hydrogen bonds link the mol­ecules, forming a three-dimensional network

RePaint-NeRF: NeRF Editting via Semantic Masks and Diffusion Models

The emergence of Neural Radiance Fields (NeRF) has promoted the development of synthesized high-fidelity views of the intricate real world. However, it is still a very demanding task to repaint the content in NeRF. In this paper, we propose a novel framework that can take RGB images as input and alter the 3D content in neural scenes. Our work leverages existing diffusion models to guide changes in the designated 3D content. Specifically, we semantically select the target object and a pre-trained diffusion model will guide the NeRF model to generate new 3D objects, which can improve the editability, diversity, and application range of NeRF. Experiment results show that our algorithm is effective for editing 3D objects in NeRF under different text prompts, including editing appearance, shape, and more. We validate our method on both real-world datasets and synthetic-world datasets for these editing tasks. Please visit https://repaintnerf.github.io for a better view of our results.Comment: IJCAI 2023 Accepted (Main Track

OR-047 Mechanical stretch activates glycometabolism-related enzyme through estrogen in C2C12 myoblasts

Objective Exercise is involved with some Metabolic diseases, moderate exercise may improve glycometabolism and type 2 diabetes mellitus in menopausal female. Previous study showed that exercise increased the level of muscular estrogen in Ovariectomized rats, improved muscle mass and glycometabolism, it provided a reference to relief type 2 diabetes mellitus symptom. Until now, the effect of estrogen induced by exercise on muscular glycometabolism is not clear, the present study was designed to explore the effect of estrogen induced by mechanical stretch on glycometabolism in mouse C2C12 myoblasts. Methods The mouse C2C12 myoblasts in vitro were plated at BioFlex Culture Plate, and assigned randomly to the control group(C), stretch group(S), SA group. SA group was cultured in growth medium with 400μg/ml anastrozole(aromatase inhibitor), other groups were cultured in GM with DMSO for 36h, and then S, SA groups were stretched by Flexcell FX-5000TM system (magnitude 15%, frequency 1Hz, duration 6hours), Cellular proteins were extracted after 24h of stretch, ELISA assay was used to detect estradiol levels, we detected the expression of HK, PI3K, the ratio of p-AKT and AKT, GLUT4 protein level by Western blotting. Results Compared with the control group, a higher estradiol level was detected in stretch group(P<0.05), and the protein expression of HK, PI3K, the ratio of p-AKT and AKT, GLUT4 is higher(P<0.05) after stretching. The estradiol level and protein expression is lower in SAF group as compare to the stretch group(P<0.05). while there was no significant difference in estradiol level and protein expression between SF group and SAF group(P>0.05). Conclusions Estrogen induced by mechanical stretch can improve glycometabolism-related enzyme and protein expression of mouse C2C12 myoblasts