Image Deblurring by Exploring In-Depth Properties of Transformer.

Image deblurring continues to achieve impressive performance with the development of generative models. Nonetheless, there still remains a displeasing problem if one wants to improve perceptual quality and quantitative scores of recovered image at the same time. In this study, drawing inspiration from the research of transformer properties, we introduce the pretrained transformers to address this problem. In particular, we leverage deep features extracted from a pretrained vision transformer (ViT) to encourage recovered images to be sharp without sacrificing the performance measured by the quantitative metrics. The pretrained transformer can capture the global topological relations (i.e., self-similarity) of image, and we observe that the captured topological relationships about the sharp image will change when blur occurs. By comparing the transformer features between recovered image and target one, the pretrained transformer provides high-resolution blur-sensitive semantic information, which is critical in measuring the sharpness of the deblurred image. On the basis of the advantages, we present two types of novel perceptual losses to guide image deblurring. One regards the features as vectors and computes the discrepancy between representations extracted from recovered image and target one in Euclidean space. The other type considers the features extracted from an image as a distribution and compares the distribution discrepancy between recovered image and target one. We demonstrate the effectiveness of transformer properties in improving the perceptual quality while not sacrificing the quantitative scores peak signal-to-noise ratio (PSNR) over the most competitive models, such as Uformer, Restormer, and NAFNet, on defocus deblurring and motion deblurring tasks. The code is available at https://github. com/erfect2020/TransformerPerceptualLoss.

Parenting styles and obsessive-compulsive symptoms in college students: the mediating role of perfectionism.

Introduction: Obsessive-compulsive symptoms is a common psychological phenomenon among early adulthood college students, which are closely related to their parents' parenting styles. Theoretical and some empirical studies have suggested the mediating role of perfectionism in this process, but this has not been confirmed, and the binary perspective of positive-negative perfectionism has not been addressed in this issue. Methods: This study aimed to investigate the mediating role of perfectionism in the relationship between parenting styles and obsessive-compulsive symptoms among college students. A total of 661 college students participated in this study. Results: Negative perfectionism mediated the relationship between negative parenting style and obsessive-compulsive symptoms among college students. Negative parenting style predicted obsessive-compulsive symptoms through its positive predictive effect on negative perfectionism. However, the mediating effect of positive perfectionism was not significant in this process. Discussion: This study provides further evidence of the mechanisms underlying the occurrence of obsessive-compulsive symptoms, and offers new ideas for interventions for OCD.

Suicidal Ideation and Mental Health Help-Seeking Behaviors Among Older Chinese Adults During the COVID-19 Pandemic.

OBJECTIVE: To examine prevalence and correlates of suicidal ideation in older Chinese adults (OCAs) during the COVID-19 pandemic, as well as mental health help-seeking behaviors of suicidal OCAs. BACKGROUND: Few data on suicidal behaviors of older adults during the pandemic are available. METHODS: In this cross-sectional survey, 1159 OCAs completed an online self-administered questionnaire between 23 February and 25 March 2020. A standardized single question and the 12-item General Health Questionnaire were used to assess the presence of suicidal ideation and common mental health problems (CMHPs), respectively. Suicidal ideators were further asked about their perceived need for mental health care and help-seeking from mental health workers. RESULTS: 4.1% of the OCAs experienced suicidal ideation during the past 2 weeks. Among the suicidal OCAs, 31.9% perceived a need for mental health care but only 10.6% had sought help from mental health workers. Factors significantly associated with suicidal ideation were a marital status of "others" (OR=2.39, P = .021), disagreement regarding the successful containment of the pandemic (OR=2.43, P = .022), physical health problems (OR=2.23, P = .012), and CMHPs (OR=4.99, P < .001). CONCLUSIONS: During the COVID-19 pandemic, OCAs constitute a subpopulation that needs mental health services for suicidal problems but tends not to seek mental health help. Mental health services for OCAs may include mental health education, periodic evaluation of risk of suicide, expanded psychosocial support, and, when necessary, psychological crisis intervention and psychiatric treatment.

The relationship between peer victimization and social anxiety among adolescents: a moderated mediation model with cognitive flexibility and affect intensity.

Building a friendship with peers is an important developmental task. However, peer victimization and social anxiety are among the most disturbing problems and have impaired adolescents' adaptive development. A total of 942 adolescents completed the survey. The results showed that peer victimization was related to social anxiety and that this effect was mediated by cognitive flexibility and moderated by affect intensity. Specifically, the damage of peer victimization and social anxiety was aggrevated for those with high levels of affect intensity. The current study provides evidence for the association between peer victimization and social anxiety. It contributes to the literature by clarifying the equivocal findings and uncovering the underlying mechanisms of the relationship between peer victimization and social anxiety. In the future, researchers and teachers should pay attention to adolescents' peer social status as early as possible, especially for adolescents with higher levels of affect intensity.

Hope as a Process in Understanding Positive Mood and Suicide Protection.

Background: According to the broaden-and-build model of positive mood, positive emotions are believed to broaden cognition resources and build psychological resiliency, to help incur positive psychological outcomes. Aim: We examined hope as a potential mediator of the association between positive mood and suicide protection (viz., life satisfaction and reasons for living) in adults. We hypothesized that positive mood would be associated with greater suicide protection through broadening hope agency and building hope pathways. Method: A sample of 320 college students completed measures of positive emotions, hope, and suicide protection. Results: Results from bootstrapped mediation testing indicated that hope agency, but not hope pathways, partially or fully mediated the relationship between positive mood and suicide protection. Limitations: It is not clear whether these findings are generalizable to a more diverse adult population. Also, it is not possible to rule out alternative causal models involving positive emotions and suicide protection. Conclusion: These findings provide some promising preliminary evidence for how positive emotions might help build hope agency to foster greater suicide protection in adults.

COVID-19 Vaccine Uptake, Acceptance, and Hesitancy Among Persons With Mental Disorders During the Second Stage of China's Nationwide Vaccine Rollout.

Persons with mental disorders (PwMDs) are a priority group for COVID-19 vaccination, but empirical data on PwMDs' vaccine uptake and attitudes toward COVID-19 vaccines are lacking. This study examined the uptake, acceptance, and hesitancy associated with COVID-19 vaccines among Chinese PwMDs during China's nationwide vaccine rollout. In total, 906 adult PwMDs were consecutively recruited from a large psychiatric hospital in Wuhan, China, and administered a self-report questionnaire, which comprised standardized questions regarding sociodemographics, COVID-19 vaccination status, attitudes toward COVID-19 vaccines, and psychopathology. Vaccine-recipients were additionally asked to report adverse events that occurred following vaccination. PwMDs had a much lower rate of vaccination than Wuhan residents (10.8 vs. 40.0%). The rates of vaccine acceptance and hesitancy were 58.1 and 31.1%, respectively. Factors associated with vaccine uptake included having other mental disorders [odds ratio (OR) = 3.63], believing that ≥50% of vaccine-recipients would be immune to COVID-19 (OR = 3.27), being not worried about the side effects (OR = 2.59), and being an outpatient (OR = 2.24). Factors associated with vaccine acceptance included perceiving a good preventive effect of vaccines (OR = 12.92), believing that vaccines are safe (OR = 4.08), believing that ≥50% of vaccine-recipients would be immune to COVID-19 (OR = 2.20), and good insight into the mental illness (OR = 1.71). Adverse events occurred in 21.4% of vaccine-recipients and exacerbated pre-existing psychiatric symptoms in 2.0% of vaccine-recipients. Nevertheless, 95.2% of vaccine-recipients rated adverse events as acceptable. Compared to the 58.1% vaccine acceptance rate and the 40.0% vaccination rate in the general population, the 10.8% vaccine coverage rate suggested a large unmet need for COVID-19 vaccination in Chinese PwMDs. Strategies to increase vaccination coverage among PwMDs may include provision of reliable sources of information on vaccines, health education to foster positive attitudes toward vaccines, a practical guideline to facilitate clinical decision-making for vaccination, and the involvement of psychiatrists in vaccine consultation and post-vaccination follow-up services.

Model of Metal Microstructure Evolution Considering Shear Effect and Its Simulation Application in Rolling of Heavy Cylinders.

In the rolling process of heavy cylinders, the deformation section is subjected to the effects of compression and shear. In order to analyze the influences of the shear effect on the microstructure evolution characteristics, a mathematical model was established and the rolling process was simulated. Firstly, shear-compression specimen (SCS) and ordinary cylinder specimens were designed, high-temperature compression experiments were carried out and the mathematical model of microstructure evolution considering shear effect was established; then, a program based on finite element software was developed to simulate the microstructure evolution process, and the feasibility of the development program was verified by compression experiments. Finally, a macro-micro coupling model based on the development program was established to simulate the microstructure evolution of the heavy cylinder during the rolling process. Then, the influence of the shear effect on the microstructure evolution was analyzed. The results showed that the shear effect had a great influence on the heavy cylinder. Dynamic recrystallization was more likely to occur in the heavy cylinder during the rolling process and the grain refinement was more obvious; compared with the case without considering the shear effect, the volume fraction of dynamic recrystallization was increased by 0.25%, and the grain size was refined by 30 µm.