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Search Results: 1 - 10 of 18587 matches for " Han Xiangli "
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Understanding Children’s Physical Activity and Health-Related Quality of Life: An Expectancy-Value Approach  [PDF]
Xiangli Gu
Advances in Physical Education (APE) , 2017, DOI: 10.4236/ape.2017.72013
Abstract: This review paper explores the motivational processes in physical education related to physical activity and health-related quality of life among children and adolescents. First, we review the existing body of literature relating to children’s health-related quality of life. Next, we present the expectancy-value model of achievement choice as a framework for investigating how children’s motivation in physical activity settings interacts with physical activity and health-related quality of life. In the following section, we discuss social-contextual factors within the motivational climate, and how they can enhance or constrain decisions to be physically active and influence health-related quality of life. We conclude by identifying emerging research issues, implications for practice, and suggestions for future research directions.
Changes of Children’s Motivation in Physical Education and Physical Activity: A Longitudinal Perspective  [PDF]
Xiangli Gu, Tao Zhang
Advances in Physical Education (APE) , 2016, DOI: 10.4236/ape.2016.63022
Abstract: Children’s motivation towards Physical Education (PE) decreases over the elementary school year, but little is known about how and why those declines influence changes of children’s intention and Physical Activity (PA). Guided by the expectancy-value model, this study attempted to examine the relationship between changes of children’s motivation to changes in children’s intention for future participation in PE and PA over an academic year. Using a repeated measurement technique, 354 (4th 180, 5th 174) school children’s expectancy-related beliefs, task values, intention, and PA were assessed twice over one academic school year. Time 1 was at the beginning of the fall semester, and Time 2 was at the end of the subsequent spring semester. Students’ expectancy-related beliefs and task values were positively related to their intention and PA at both Time 1 and Time 2. A factorial repeated measure MANOVA showed that decreases in task values and intention were significant (p < .01). Regression analyses indicated that decreases in children’s expectancy-related beliefs and task values explained significant variance in a decrease in their intention. Additionally, changes of expectancy-related beliefs emerged as significant predictors of changes in children’s PA. The findings revealed that children perceived less values toward PE across one academic year. Consequently, this change could contribute to the decreases in children’s intention for future participation. Thus, PE teachers should focus on learning activities students perceive as important, interesting, and usefulness in elementary school.


Immune Sculpting of Norepinephrine on MHC-I, B7-1, IDO and B7-H1 Expression and Regulation of Proliferation and Invasion in Pancreatic Carcinoma Cells
Liancai Wang, Han Liu, Xiangli Chen, Min Zhang, Keping Xie, Qingyong Ma
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0045491
Abstract: Background The sympathetic neurotransmitter Norepinephrine (NE) contributes to tumorigenesis and cancer progression. This study aims to investigate the role of NE in modulating the immune phenotype and allowing pancreatic carcinoma (PC) cells to escape the immune response. Methods Varied concentrations of NE and interferon-gamma (IFN-γ) were administrated to MIA PaCa-2 and BxPC-3 cell lines for 48 hours. Proliferation and invasion were then investigated using an MTT assay and a membrane invasion culture system respectively. MHC-I, B7-1, IDO and B7-H1 expression were measured using real-time quantitative RT-PCR, western blotting and immunocytochemistry. The synergistic and time-dependent effects of NE/IFN-γ were also investigated. Adrenergic antagonists were used to identify the relevant target receptor of NE. Results The results showed that NE had dose-dependent and time-dependent effects on cell biological processes as well as on the expression of MHC-I, B7-1, IDO and B7-H1. These effects occurred mainly via the β2-adrenergic receptor. Long-term NE treatment was able to antagonize some of the effects of IFN-γ (after 2 weeks of treatment), but NE and IFN-γ had significant synergistic stimulatory effects on IDO and B7-H1 expression. The residual effects on biological activities lasted for 2 weeks, while the immunophenotypic changes decreased at early time points after treatment. Conclusions NE plays important roles in modulating PC cell biological activities and affecting MHC-I, B7-1, IDO and B7-H1 expression in vitro, mainly via the β2-adrenergic receptor (β2-AR) in a time- and dose-dependent fashion. Only at extended treatment durations could NE affect PC cell progression and immune evasion.
Research on the Intersection Issue in Solid Modeling Based on Curved Surfaces
曲面实体造型中曲线和曲面交点的求解

Wang Xinlong,Han Xiangli,Cui Tianyuan,
王新龙
,韩向利,崔田元

中国图象图形学报 , 1998,
Abstract: The intersecting is an important factor which influences the efficiency and the reliability of Boolean algorithms in solid modeling based on curved surfaces, and the intersecting algorithm is closely related to the geometric representation of curved surfaces. Although curved surfaces can be commonly represented with NURBS, unnecessary complexities are caused for the intersecting of quadric surfaces, which are frequently used to describe geometric features of shafts, holes and grooves etc. in mechanical part designing. Therefore, intersecting algorithms of them are required to have higher accuracy, higher efficiency and higher robustness. For this reason, we introduce a practical representation of quadric surfaces, and on the basis of that, algorithms of intersection points between quadric surfaces and several conics, fourth degree nonplanar space curves constructing their boundaries are developed.
A Study on the Innovation of Teaching Management in Southwest Petroleum University  [PDF]
Xiangli Meng
Creative Education (CE) , 2019, DOI: 10.4236/ce.2019.106079
Abstract: The level of teaching management in colleges and universities affects the quality of teaching management in colleges and universities, teaching quality in colleges and universities, and further affects the quality of personnel training in colleges and universities. At present, Southwest Petroleum University is strengthening the management of teaching and improving its management level. There are many factors affecting the teaching management level and quality of Southwest Petroleum University. As one of the main carriers of teaching management of Southwest Petroleum University, students have important theoretical and practical significance in improving the management level by evaluating the teaching management satisfaction and finding out the existing problems and solutions. This study first summarizes the problems existing in the daily teaching management, teaching guarantee management and teaching quality management of Southwest Petroleum University. Secondly, it analyses the causes of the problems. Finally, it puts forward the corresponding solutions to the problems and causes.
Self-Affirmation through WeChat Moments  [PDF]
Xiangli Wen, Yaozhong Liu, Yakun Ni
Psychology (PSYCH) , 2019, DOI: 10.4236/psych.2019.103026
Abstract: Self-affirmation is helpful for reducing the individual’s defensive response to threats, harvesting and growing from threatening but valuable information. This study examines whether viewing personal WeChat moments is self-affirmative. Browsing WeChat moments of other people that better than yourself will lead to an upward social comparison, but the effect of browsing your own moments is rarely discussed. This study conducts an experiment, and the result proves that browsing WeChat moments is an effective self-affirmation intervention paradigm. The self-affirmation paradigm which is close to daily life deserves further promotion and research.
The Discrimination Classification in the Listed Companies in Accordance with the Market Quality Indexes
Xiangli LI,Shaorong SUN
Management Science and Engineering , 2010,
Abstract: All listed companies in the Shanghai Stock Exchange in 2008 were ranked according to the total market capitalization, the revenue and the net profit. The top 100 listed companies and the countdown listed companies were selected. Then the random 100 listed companies were extracted. The two discrimination classification functions of the listed companies in accordance with the market quality indexes were established by the three types companies as categorical dependent variables and the price impacting index, the liquidity index, the large transaction costs and the excess volatility ratio as the independent variables that were selected among the 11 market quality indexes by the forward stepwise method. The accuracy rate of the discrimination classification functions of the listed companies was 77.74% through verifying by the original back substitution. The classification results were significant. Key words: The price impacting index; The liquidity index; The large transaction costs; The excess volatility ratio; The discrimination classification function
AN EMERGING NICHE FOR FIRMS IN WESTERN REGIONS OF CHINA IN THE PERIOD OF TRANSITION ECONOMY TO DEVELOP RENEWABLE ENERGY INDUSTRY: A PERSPECTIVE FROM INSTITUTIONAL ENTREPRENEURSHIP
Liu-xu XIANGLI
Management Science and Engineering , 2008,
Abstract: This paper explores the enabling role of institutional entrepreneurship in western regions of China in the context of transition economy. Considering the widely emerging concerns to develop environment friendly technologies and industries, which could contribute to the achievement of sustainable development both economically and ecologically, this paper proposes that western regions are standing in front of a great opportunity by stimulating development of the emerging renewable energy industry. In this process, institutional entrepreneurships under the massive institutional change, i.e, the Grand Western Development Program, could have the “path defining” effect through leveraging the emerging great niche and redirecting western regions to an innovative path instead of following the traditional resource-based development path. Key words: Western Regions, China, transition economy, renewable energy industry, institutional entrepreneurship
Cloning and Characterization of a Human Novel Gene netrin-G2
Ye XIANGLI,Lei LIFANG
Journal of Neurological Sciences , 2009,
Abstract: The Netrins is one of a small phylogenetically conserved family members which are laminin- related secreted proteins. The Netrins play a critical role in cell migration and axon guidance. Its homologues have been widely described in various animals. Netrins can be subdivided into two subfamilies, classical Netrins and Netrin-Gs. Since the members of Netrin-G subfamily exhibit a high degree of similarity and there is only one member, Netrin-G1, identified in human, it is presumed that there must be new members in human too.In this paper the total RNA in brains was extracted from 20 weeks human embryos, and the cDNA Library was constructed by using a cDNA PCR Library Kit. A full-length human netrin-G cDNA, named netrin-G2, was generated by using special primers and PCRs. Finally, a primary study about the expression of human netrin-G2 was carried out by northern blot analysis and a research about the relationship between human Netrin-G2 and other Netrins family members was determined by phylogenetic tree analysis. Human netrin-G2 was indeed a new member of netrin-G subfamily, which mapped to chromosome 9q34. The final assembled cDNA sequence of human netrin-G2 was 2428 bps in length, which could encoding a 530-amino acid protein. Northern blot analysis revealed that netrin-G2 expressed specifically in brain and seldom in other tissues.These results suggested that netrin-G2 might play an important role in the development of central nervous system and might contribute to excitatory neurotransmission and neural modulation.
Cloning and Characterization of a Human Novel Gene Netrin-G2
Ye XIANGLI,Lei LIFANG
Journal of Neurological Sciences , 2008,
Abstract: The Netrins is one of a small phylogenetically conserved family members which are laminin- related secreted proteins. The Netrins play a critical role in cell migration and axon guidance. Its homologues have been widely described in various animals. Netrins can be subdivided into two subfamilies, classical Netrins and Netrin-Gs. Since the members of Netrin-G subfamily exhibit a high degree of similarity and there is only one member, Netrin-G1, identified in human, it is presumed that there must be new members in human too. In this paper the total RNA in brains was extracted from 20 weeks human embryos, and the cDNA Library was constructed by using a cDNA PCR Library Kit. A full-length human netrin-G cDNA, named netrin-G2, was generated by using special primers and PCRs. Finally, a primary study about the expression of human netrin-G2 was carried out by northern blot analysis and a research about the relationship between human Netrin-G2 and other Netrins family members was determined by phylogenetic tree analysis. Human netrin-G2 was indeed a new member of netrin-G subfamily, which mapped to chromosome 9q34. The final assembled cDNA sequence of human netrin-G2 was 2428 bps in length, which could encoding a 530-amino acid protein. Northern blot analysis revealed that netrin-G2 expressed specifically in brain and seldom in other tissues. These results suggested that netrin-G2 might play an important role in the development of central nervous system and might contribute to excitatory neurotransmission and neural modulation.
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