Secondary aerosol formation on the heterogeneous reaction between SO₂ and NO₂ with ZnO particle

Zixiang Xu,Rujiao Song,Joo-Chang Park,Hueon Namkung,Li-Hua Xu,Hyung-Taek Kim 한국에너지기후변화학회 2017 한국에너지기후변화학회 학술대회 Vol.2017 No.11

Effect of calcination atmospheres on the catalytic performance of nano-CeO2 in direct synthesis of DMC from methanol and CO2

Zixiang Cui,Jie Fan,Huijuan Duan,Junfeng Zhang,Yongqiang Xue,Yisheng Tan 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.1

Nano-CeO2 was prepared through the calcination of Ce(OH)3 precursor in different atmospheres (H2, Ar, air, O2), which was prepared by a hydrothermal method, and then used as catalysts in the direct synthesis of dimethyl carbonate (DMC) from methanol and CO2. The results indicated that the catalyst calcined in O2 (CeO2-O2) showed an optimum catalytic performance, and the yield of DMC reached to 1.304mmol/mmolcat. In addition, reaction temperature and weight of catalyst were optimized. Based on characterizations of the catalysts, the ratio of Ce(IV)/Ce(III) and Lewis acid-base property of nano-CeO2 catalyst could be adjusted through different calcination atmosphere treatment. It was determined that the higher activity of CeO2-O2 catalyst is mainly attributed to its higher ratio of Ce(IV)/Ce(III) as well as abundant and moderate intensity Lewis acid base sites.

The Relationship among Negotiation, Constraints, Self-efficacy, and Physical Activity in Chinese Elderly: A Perceived-Constraint-Reduction Model

Zixiang Zhou,Zhiyu Leng,Zhaoyong Liu,Jie Li 아시아스포츠융합과학회 2023 Asia Pacific Journal of Applied Sport Sciences Vol.4 No.1

PURPOSE This study investigated the relationship among negotiation, constraints, self-efficacy, and physical activity in Chinese elderly. METHOD Elderly participants who agreed to complete a questionnaire were recruited from five cities in Hunan province. A total of 300 valid questionnaires were collected and analyzed using SPSS and AMOS 26. RESULTS We found that negotiation has a direct positive impact on physical activity and negotiation has an indirect positive impact on physical activity via self-efficacy and constraints. CONCLUSION To enhance physical activity in the elderly, it is necessary to improve their self-efficacy, provide incentive mechanisms and positive feedback to encourage negotiation, and offer social support to enhance their ability to overcome constraints.

Elderly Functional health literacy and Health Status: The Mediating Role of Physical Activity Frequency and Duration

( Zixiang Zhou ),( Zhiyu Leng ),( Zhaoyong Liu ) 한국융합과학회 2022 한국융합과학회 국제학술대회자료집 Vol.2022 No.0

The health status of the elderly is a concern for many people. Many studies have shown that functional health literacy of the elderly will affect their health status, and health behavior plays a mediating role in this process (Hu, 2022; Liu et al., 2015). Considering that physical activity is an important means to improve the quality of health, its impact on health behavior is often positive (Geboers et al., 2014; Mõttus et al., 2014). However, it is undeniable that the elderly group needs to bear more risks during physical activities (Yamada & Demura, 2009). Excessive physical activity will also bring irreversible injury (Kallinen & Markku, 1995). In this way, the relationship of physical activity on the health of the elderly has become a problem to be discussed. The purpose of this study is to explore the relationship between functional health literacy, physical activity frequency, duration and health status of the elderly through correlation analysis and regression analysis. Therefore, the following two research questions are established in this study. First, does the frequency and duration of physical activity play a mediating role between functional health literacy and health status? Second, which mediating path of physical activity frequency and duration is more important for health status? Methods In this study, the elderly over 60 years old with physical activity habbit were taken as the subjects. Using the purposive sampling method and the spatial dimension as the sampling basis, five prefecture level cities located in the east, west, north, south and middle of Hunan Province (Changde City, Yongzhou City, Huaihua City, Zhuzhou City and Xiangtan City) were selected as the study areas for questionnaire distribution, and 513 valid questionnaires were finally collected. The questionnaire used in the measurement was adapted from HLS-14 (Suka et al., 2013), PASE (Washburn et al., 1993), Physical Exercise Self-Efficacy Scale (Schwarzer & Renner, 2009) and Health Status Scale (Reisi et al., 2012), The adapetd questionnaire revised the expression of some items, and consulted experts to confirm the equivalence of translation. The analysis of the survey data shows that the questionnaire has appropriate reliability and validity (Table 1). Findings and Discussions The results were as follows. Firstly, through Pearson correlation analysis (Table 2), it was determined that functional health literacy, physical activity frequency and duration had significant positive correlation with health status. Second, Path analysis is conducted through linear regression, and the conclusions are shown in the table 3, 4 and 5 below. The research conclusion shows that there is a positive correlation between functional health literacy, physical activity frequency, duration and health status in the elderly population. This conclusion proves that functional health literacy can indirectly improve health status by increasing the frequency and duration of physical activities. Althrough the mediating path is accepted, physical activity frequency or duration do not show a decisive advantage in improving health status compared with other similar health behavior studies, and there is no significant difference between them in mediating effect.

Study on Microbial Community Succession and Protein Hydrolysis of Donkey Meat during Refrigerated Storage Based on Illumina NOVA Sequencing Technology

Zixiang Wei,Ruidong Chu,Lanjie Li,Jingjing Zhang,Huachen Zhang,Xiaohong Pan,Yifan Dong,Guiqin Liu 한국축산식품학회 2021 한국축산식품학회지 Vol.41 No.4

In this study, the microbial community succession and the protein hydrolysis of donkey meat during refrigerated (4℃) storage were investigated. 16S rDNA sequencing method was used to analyze the bacteria community structure and succession in the level of genome. Meanwhile, the volatile base nitrogen (TVB-N) was measured to evaluate the degradation level of protein. After sorting out the sequencing results, 1,274,604 clean data were obtained, which were clustered into 2,064 into operational taxonomic units (OTUs), annotated to 32 phyla and 527 genus. With the prolonging of storage time, the composition of microorganism changed greatly. At the same time, the diversity and richness of microorganism decreased and then increased. During the whole storage period, Proteobacteria was the dominant phyla, and the Photobacterium, Pseudompnas, and Acinetobacter were the dominant genus. According to correlation analysis, it was found that the abundance of these dominant bacteria was significantly positively correlated with the variation of TVB-N. And Pseudomonas might play an important role in the production of TVB-N during refrigerated storage of donkey meat. The predicted metabolic pathways, based on PICRUSt analysis, indicated that amino metabolism in refrigerated donkey meat was the main metabolic pathways. This study provides insight into the process involved in refrigerated donkey meat spoilage, which provides a foundation for the development of antibacterial preservative for donkey meat.

Evaluation of the Suitability of Urban Parks in Tangshan Hebei China

ZiXiang Wang,김기수 사단법인 한국융합기술연구학회 2024 아시아태평양융합연구교류논문지 Vol.10 No.3

In recent years, the dramatic expansion of urban scale and the high intensity of transportation activities have brought about many social problems, and the contradiction between urbanization and the natural ecology and humanistic environment has been increasing, triggering land-use conflicts, which makes the original natural landscape areas altered and the balance of the ecosystem threatened. In this study, the South Lake Park in Tangshan, Hebei Province, is used as an example to evaluate the suitability of the park using the hierarchical analysis method (AHP). Several key influencing factors were considered in the study, including natural landscape, cultural features, infrastructure, environmental protection, accessibility and management quality. The results of the study show that South Lake Park has advantages in terms of natural landscape and cultural features, but there is room for improvement in terms of infrastructure maintenance, environmental protection measures and accessibility. The overall evaluation score of the park accessibility is 3.4, the landscape is 3.95, the overall score of uniqueness is 3.8, the infrastructure is 2.96, and the management service is 3.04. Based on the scores, three targeted optimization strategies are proposed for the appropriateness of the South Lake Park in Tangshan City. The first is to improve the organization and design of slow-moving traffic, the second is to improve the concept of landscape design, and the third is to propose the improvement of the park's management services, the timely maintenance of various facilities in the park, and the training of service personnel's attitudes. This study not only provides a scientific assessment method for the planning and construction of urban parks in Tangshan City, but also provides some lessons and references for other cities on similar issues. In the process of urbanization, scientific and reasonable urban park planning is of great significance in realizing the sustainable development of cities and improving the quality of life of residents.

Evaluation of Ash Deposition Behavior and Fine Particle Formation from Combustion of Low-rank Coal Impregnated with Molasses in DTF

Zixiang Xu,Joo Chang Park,Hueon Namkung,Li Hua Xu,Hyung Taek Kim 한국에너지기후변화학회 2019 한국에너지기후변화학회 학술대회 Vol.2019 No.05

Research on the Defense Method of Vtable Hijacking

Wang Zixiang,Shan Chun,Xue Jingfeng,Sun Shiyouhu Changzhen 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.11

Memory corruption vulnerability is an oldest type of vulnerabilities in software vulnerabilities. Attackers typically use a technique called virtual function table hijacking to exploit memory corruption vulnerability. In this paper, we propose a defense method which extracting virtual function tables and virtual function call related location information from the binary program. Then instrumenting identifier on vtables or backuping the vtables’ pointers to detect vtables’ integrity. Finally, the defense method is verified by Firefox, Chrome, IE browsers. Experiments show that the method can fully and effectively defend the real-world virtual function table hijacking attack with the small performance overhead and good compatibility.

Understanding User Needs for Creative Marine Culture Products: A Grounded Theory Approach

기육철,ZiXiang Wang,이승헌,박승태 사단법인 한국융합기술연구학회 2023 아시아태평양융합연구교류논문지 Vol.9 No.11

Cultural and creative products speak about culture, history, and a country’s identity. Under the consumption mode of the new era, designers can create excellent cultural and creative products only by accurately grasping the consumers' demand for the value of the products. This study aimed to explore the issues and expectations within maritime cultural creative product. Grounded theory was used to conduct user interviews. A three-level coding method to code, analyze and construct logical relationships for the interview texts according to the principles of grounded theory was also used. In-depth analysis of the demand value of local consumers was conducted to explore the design path of marine cultural creative products, to improve the effective docking of supply and demand in the product market. The study results showed that users' needs for marine cultural creative products mainly include nine core concepts (aesthetic value, display value, aesthetic taste, cultural impression, memory empathy, utility value, individual needs, performance value, and service value.) and functional value. Moreover, cultural and creative products designed on the basis of this research can gain a competitive advantage in the market, enhance the vitality of the surrounding marine cultural and creative market, and play a vital role in the inheritance, protection and development of marine culture. In future research, integrating scientific quantitative methods can aid in making experimental data more precise.

Investigation of the synergistic reaction between SO₂ and NO₂ on mineral oxides

Rujiao Song,Zixiang Xu,Joo-Chang Park,Hueon Namkung,Li-Hua Xu,Hyung-Taek Kim 한국에너지기후변화학회 2017 한국에너지기후변화학회 학술대회 Vol.2017 No.11