Fast 3D Stylized Gaussian Portrait Generation From a Single Image With Style Aligned Sampling Loss

Creating stylized 3D avatars and portraits from just a single image input is an emerging challenge in augmented and virtual reality. While prior work has explored 2D stylization or 3D avatar generation, achieving high-fidelity 3D stylized portraits with text control remains an open problem. In this paper, we present an efficient approach for generating high-quality 3D stylized portraits directly from a single input image. Our core representations are based on 3D Gaussian Splatting for efficient rendering, along with a surface-guided splitting and cloning strategy to reduce noise. To achieve high-fidelity stylized results, we introduce a Stylized Generation Module with a Style-Aligned Sampling Loss that injects the input image’s identity information into the diffusion model while stabilizing the stylization process. Furthermore, we incorporate a multi-view diffusion model to enforce 3D consistency by generating multiple viewpoints. Extensive experimentation demonstrates that our approach outperforms existing methods in terms of stylization quality, 3D consistency, and user preference ratings. Our framework enables casual users to easily generate stylized 3D portraits through simple image or text inputs, facilitating engaging experiences in AR/VR applications

Thermal Failure Analysis of Fiber-Reinforced Silica Aerogels under Liquid Nitrogen Thermal Shock

Aerogel materials are recognized as promising candidates for the thermal insulator and have achieved great successes for the aerospace applications. However, the harsh environment on the exoplanet, especially for the tremendous temperature difference, tends to affect the tenuous skeleton and performances of the aerogels. In this paper, an evaluation method was proposed to simulate the environment of exoplanet and study the influence on the fiber-reinforced silica aerogels with different supercritical point drying (SPD) technology. Thermal conductivity, mechanical property and the microstructure were characterized for understanding the thermal failure mechanism. It was found that structure and thermal property were significantly influenced by the adsorbed water in the aerogels under the thermal shocks. The thermal conductivity of CO2-SPD aerogel increased 35.5% after the first shock and kept in a high value, while that of the ethanol-SPD aerogel increased only 19.5% and kept in a relatively low value. Pore size distribution results showed that after the first shock the peak pore size of the CO2-SPD aerogel increased from 18 nm to 25 nm due to the shrinkage of the skeleton, while the peak pore size of the ethanol-SPD aerogel kept at ~9 nm probably induced by the spring-back effect. An 80 °C treatment under vacuum was demonstrated to be an effective way for retaining the good performance of ethanol-SPD aerogels under the thermal shock. The thermal conductivity increases of the ethanol-SPD aerogels after 5 shocks decreased from ~30 to ~0% via vacuum drying, while the increase of the CO2-SPD aerogels via the same treatments remains ~28%. The high-strain hardening and low-strain soften behaviors further demonstrated the skeleton shrinkage of the CO2-SPD aerogel

Effect of siRNA Interference with Upregulated Gene 11 Expression on the Biological Functions of Osteosarcoma Cell Line MG63 and Their Mechanisms

This study investigated the effect of siRNA interference with URG11 expression on biological function of osteosarcoma cell line MG63 and its mechanism. MG63 cells cultured in vitro were apportioned to make up a control group (not transfected), NC-siRNA group (transfected nonspecific NC-siRNA), and URG11-siRNA group (transfected URG11-siRNA). The expression of URG11 was detected through reverse-transcription polymerase chain reaction (RT-PCR). The metastasis, infiltration, and apoptosis of MG63 cells were examined through CCK-8, Transwell, and flow cytometry techniques, respectively. The expressions of URG11 protein in each group of cells and of proteins β-catenin, c-Myc, cyclin D1, MMP-2, and survivin, which are related to the Wnt/β-catenin signal pathway, were visualized by the Western blot method. In comparison with the control group, transfected URG11-siRNA may reduce the expression levels of URG11 and URG11 mRNA, β-catenin, CyclinD1, c-Myc, MMP-2, and survivin proteins in MG63 cells, and may decrease the metastasis and infiltration of MG63 cells and enhance apoptosis; nevertheless, there was no obvious change in MG63 cells after NC-siRNA transfection. The proliferation and infiltration of MG63 cells can be inhibited by interference with URG11 expression, and the apoptosis of MG63 cells can be promoted by interference with URG11 expression. The mechanism of interference with URG11 expression may relate to inhibiting the activation of the Wnt/β-catenin pathway.</jats:p