Numerical simulation of aerodynamic characteristics of windmill based on computer graphics display technology

Abstract This paper proposed research on wind computation fluid dynamics(CFD) analysis and visualization in scientific computing facing to OSG in order to obtain numerical result of aerodynamic characteristics stimulated by windmill and to display vivid and direct 3-D effect for easy observation experiment. This paper applied CFX module in ANSYS Workbench software to conduct CFD analysis and calculation of windmill through computer graphic display technology based on CFD principle and realize numerical stimulation of aerodynamic characteristics of windmill. Then the research on visualization in scientific computing of aerodynamic characteristics of windmill was realized combining with OSG software that face to virtual display technolog

Adaptive Image Transcoding

Images comprise a substantial portion of network traffic. Reducing the filesize of an image while preserving quality can reduce storage costs and bandwidth usage, as well as reduce latency. This disclosure describes techniques for adaptive transcoding of an image into an appropriate target file format such that file size is reduced while preserving image quality. An input image is processed to remove compression artifacts. An image quality metric is obtained and an image codec is selected. The image is encoded using the selected codec

Microstructure and Properties of CoCrFeMnNiMox High-Entropy Alloy Coating by Laser Cladding

45 steel has the problems of low wear resistance and poor corrosion resistance. CoCrFeMnNiMox (x=0.00, 0.25, 0.50, 0.75, 1.00) high-entropy alloy coating was prepared on 45 steel by laser cladding. The influence of Mo on the microstructure and properties of coating were explored in detail. The results show that the CoCrFeMnNiMox high-entropy alloy coating is composed of a single face-centered cubic (FCC)solid-solution phase. The microstructure of the Mo-containing coating is a typical dendritic and interdendritic structure, which is caused by the heterogeneous nucleation of the molten pool during the solidification process. The microhardness of the coating increases with the increase of x, and the maximum microhardness of the Mo1.00 coating is 2.391 GPa. Quantitative calculations show that solution strengthening is the main reason for the increase of microhardness. With the increase of Mo mass fraction, the wear mechanism evolves from adhesive wear to abrasive wear and oxidative wear. The Mo1.00 coating has the lowest volume wear rate (0.68×10-4 mm3/(N·m)). The influence of the passivation process on the corrosion resistance of coating was analyzed based on the point defect model theory. The addition of the Mo element increases the dehydration rate of the passivation behavior of coating, which makes the oxide layer thicker, and thereby improving the corrosion resistance of coating. The corrosion mechanism of coatings is intergranular corrosion. Mo0.75 coating has the smallest self-corrosion current density and the most positive self-corrosion potential, which are 3.69×10-6 A/cm2 and -0.432 V, respectively

Factors Associated with Utilization of a Free HIV VCT Clinic by Female Sex Workers in Jinan City, Northern China

Based on our previous qualitative exploration, this research presents the second phase in our study of factors associated with utilization of a free HIV VCT clinic in Jinan City, Northern China, by female sex workers (FSWs). A total of 970 FSWs from entertainment venues were interviewed and prospectively followed to determine who ultimately sought and received VCT at the clinic, compared to those who did not. Simple and multiple logistic regressions were performed on factors drawn from the Ecological Perspective, hypothesized to be associated with utilization of testing at the VCT clinic. Despite 69% of FSWs expressing willingness to attend the VCT clinic, only 11% were actually tested. The multiple logistic regression model that provided best goodness of fit included the covariates of willingness to attend the VCT clinic (Adjusted OR 3.13, 95% CI: 1.62–6.59), low perceived HIV infection risk (Adjusted OR 0.64, 95% CI: 0.35–1.11), low fear of FSWs status disclosure in the clinic (Adjusted OR 0.55, 95% CI: 0.31–0.94) and influence of acquaintances (Adjusted OR 0.52, 95% CI: 0.29–0.89) and peers (Adjusted OR 2.45, 95% CI: 1.40–4.50). This is the first study in China to follow FSWs longitudinally to measure factors related to VCT utilization. The low utilization of VCT services by participants in our study is similar to prior reports throughout China. FSWs’ access to VCT service is associated with intrapersonal, institutional, and particularly, interpersonal factors. Based on these findings, we recommend emphasis on confidentiality of services, VCT education for influential peers, and introduction of HIV rapid testing on site

Integrating omics reveals that miRNA-guided genetic regulation on plant hormone level and defense response pathways shape resistance to Cladosporium fulvum in the tomato Cf-10-gene-carrying line

Invasion of C. fulvum causes the most serious diseases affecting the reproduction of tomatoes. Cf-10-gene-carrying line showed remarkable resistance to Cladosporium fulvum. To exploit its defense response mechanism, we performed a multiple-omics profiling of Cf-10-gene-carrying line and a susceptible line without carrying any resistance genes at non-inoculation and 3 days post-inoculation (dpi) of C. fulvum. We detected 54 differentially expressed miRNAs (DE-miRNAs) between the non-inoculation and 3 dpi in the Cf-10-gene-carrying line, which potentially regulated plant-pathogen interaction pathways and hormone signaling pathways. We also revealed 3,016 differentially expressed genes (DEGs) between the non-inoculated and 3 dpi in the Cf-10-gene-carrying line whose functions enriched in pathways that were potentially regulated by the DE-miRNAs. Integrating DE-miRNAs, gene expression and plant-hormone metabolites indicated a regulation network where the downregulation of miRNAs at 3 dpi activated crucial resistance genes to trigger host hypersensitive cell death, improved hormone levels and upregulated the receptors/critical responsive transcription factors (TFs) of plant hormones, to shape immunity to the pathogen. Notably, our transcriptome, miRNA and hormone metabolites profiling and qPCR analysis suggested that that the downregulation of miR9472 potentially upregulated the expression of SAR Deficient 1 (SARD1), a key regulator for ICS1 (Isochorismate Synthase 1) induction and salicylic acid (SA) synthesis, to improve the level of SA in the Cf-10-gene-carrying line. Our results exploited potential regulatory network and new pathways underlying the resistance to C. fulvum in Cf-10-gene-carrying line, providing a more comprehensive genetic circuit and valuable gene targets for modulating resistance to the virus