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290 results on '"Zhang, Zhongqiu"'

7. 3-D Impact Time and Angle Control Guidance Law Based on Sliding Mode without Speed Control.

Author

Zhang, Zhongqiu, You, Jun, and Han, Zhiguo

Subjects
*ANGLES, *CARTESIAN coordinates, *AZIMUTH, *PROJECTILES, *SPEED
Abstract

In modern warship, coordinated combat strategies require missiles hit targets simultaneously, sometimes even require angle constraints, which is difficult to replicate in three-dimensional (3-D) models. This paper proposes a novel 3-D sliding mode guidance law with multiple constraints. First, the 3-D no-thrust guidance model is derived in the coordinate system with Y -axis upward. Second, a novel guidance strategy is proposed. In pitch direction, a fast nonsingular sliding mode surface algorithm is proposed to satisfy the desired line-of-sight elevation angle. In yaw direction, based on the guidance conditions, a special sliding mode surface is proposed, which can achieve desired line-of-sight azimuth angle and desired impact time when reaching the sliding surface. Finally, simulations and comparisons verify the good performance. [ABSTRACT FROM AUTHOR]

Published
2024
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8. Research on Mobile Learning System of Colleges and Universities

Author

Yu, Hui, Zhang, Zhongqiu, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, El Rhalibi, Abdennour, editor, Pan, Zhigeng, editor, Jin, Haiyan, editor, Ding, Dandan, editor, Navarro-Newball, Andres A., editor, and Wang, Yinghui, editor

Published
2019
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12. Effectiveness of Mindfulness on Athletes Flow: the Mediating Role of Resilience.

Author

LIU Fengbo, ZHANG Zhongqiu, and LIU Shuqiang

Abstract

Objective: To explore the correlation and causality between mindfulness and flow of athletes through two studies, as well as the role of resilience. Methods; In study 1, 269 athletes were recruited and measured with questionnaires. The 2 (experimental conditions) x 2 (time) randomized controlled trial was used in study 2. 66 athletes were recruited and randomly assigned into the mindfulness training group (N = 33) and the control group (N = 33). The mediating effect of resilience was tested using the method of Bootstrap. Results; In study 1, mindfulness, resilience and flow were positively correlated with each other; Resilience mediated the relationship of mindfulness and flow. In study 2, there was no significant difference in the total scores of the pre - tested indicators between mindfulness training group and control group. Compared with the control group, the subjects in the intervention group showed increased mindfulness level, resilience and flow; Resilience change significantly mediated the relationship of group and flow. Conclusion; Mindfulness can significantly predict athletes flow; resilience mediates the relationship between mindfulness and flow. [ABSTRACT FROM AUTHOR]

Published
2024
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14. Analysis of recent coastline evolution due to marine reclamation projects in the Qinzhou Bay

Author

Yan Youxi, Zhang Zhongqiu, Wang Chunling, Zhang Leilei, Huang Yingna, and Zhang Jihong

Subjects
qinzhou bay, marine reclamation, remote sensing, geospatial analysis, coastline evolution, Naval architecture. Shipbuilding. Marine engineering, VM1-989
Abstract

Intense marine reclamation activities bring obvious benefits, meanwhile, these activities also influence the coastal natural formation, hydrodynamic processes and water environment etc. In order to investigate the exact influence in the Qinzhou Bay brought by marine reclamation behaviors in recent years, based on the remote sensing image data in the Qinzhou Bay in 2006, 2008, 2009, 2012 and 2014, with the help of GIS and RS software, the thesis interprets Qinzhou Bay coastline and artificial reclamation by man-machine interaction and makes quantitative analysis in the Qinzhou Bay coast evolution recently. The results show: (1) Qinzhou Bay coastal morphology change degree was strong in 2006 - 2012 and the coastline changed greatly. Originally part of the natural shore segments which had twists and turns were gradually filled into artificial coast, the coast constantly advanced to the sea, coastline became regular and straight; (2) The change degree of coastline was relatively small in 2006-2008, the average artificial coastline increased 8.86 km/a, the average artificial reclamation area was 20.79 km2 /a; in 2008-2012, the change range of coastline was the greatest, coastline changed most severely, the average artificial coastline increased 16.07 km/a, the average artificial reclamation area was 58.52 km2 /a; however, in 2012-2014, coastline change degree relatively slowed, the average artificial coastline increased 4.04 km per year, the average artificial reclamation area was 3.464 km2 /a. (3) Compared to the studies of predecessors, the innovation of this paper is that it is the first to carry out the detailed research on coastline evolution caused by reclamation engineerings of the Qinzhou Bay, then formed the change results on coastline that caused by intense human activities in the Qinzhou Bay, provided the area of the marine environment protection with full and accurate data.

Published
2017
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20. Supplementary Text from Single-Cell–Derived Primary Rectal Carcinoma Cell Lines Reflect Intratumor Heterogeneity Associated with Treatment Response

Author

Braun, Rüdiger, primary, Anthuber, Lena, primary, Hirsch, Daniela, primary, Wangsa, Darawalee, primary, Lack, Justin, primary, McNeil, Nicole E., primary, Heselmeyer-Haddad, Kerstin, primary, Torres, Irianna, primary, Wangsa, Danny, primary, Brown, Markus A., primary, Tubbs, Anthony, primary, Auslander, Noam, primary, Gertz, E. Michael, primary, Brauer, Philip R., primary, Cam, Margaret C., primary, Sackett, Dan L., primary, Habermann, Jens K., primary, Nussenzweig, Andre, primary, Ruppin, Eytan, primary, Zhang, Zhongqiu, primary, Rosenberg, Daniel W., primary, and Ried, Thomas, primary

Published
2023
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21. Figure S7 from Single-Cell–Derived Primary Rectal Carcinoma Cell Lines Reflect Intratumor Heterogeneity Associated with Treatment Response

Author

Braun, Rüdiger, primary, Anthuber, Lena, primary, Hirsch, Daniela, primary, Wangsa, Darawalee, primary, Lack, Justin, primary, McNeil, Nicole E., primary, Heselmeyer-Haddad, Kerstin, primary, Torres, Irianna, primary, Wangsa, Danny, primary, Brown, Markus A., primary, Tubbs, Anthony, primary, Auslander, Noam, primary, Gertz, E. Michael, primary, Brauer, Philip R., primary, Cam, Margaret C., primary, Sackett, Dan L., primary, Habermann, Jens K., primary, Nussenzweig, Andre, primary, Ruppin, Eytan, primary, Zhang, Zhongqiu, primary, Rosenberg, Daniel W., primary, and Ried, Thomas, primary

Published
2023
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22. Data from Single-Cell–Derived Primary Rectal Carcinoma Cell Lines Reflect Intratumor Heterogeneity Associated with Treatment Response

Author

Braun, Rüdiger, primary, Anthuber, Lena, primary, Hirsch, Daniela, primary, Wangsa, Darawalee, primary, Lack, Justin, primary, McNeil, Nicole E., primary, Heselmeyer-Haddad, Kerstin, primary, Torres, Irianna, primary, Wangsa, Danny, primary, Brown, Markus A., primary, Tubbs, Anthony, primary, Auslander, Noam, primary, Gertz, E. Michael, primary, Brauer, Philip R., primary, Cam, Margaret C., primary, Sackett, Dan L., primary, Habermann, Jens K., primary, Nussenzweig, Andre, primary, Ruppin, Eytan, primary, Zhang, Zhongqiu, primary, Rosenberg, Daniel W., primary, and Ried, Thomas, primary

Published
2023
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29. Advanced manufacturing technologies of large martensitic stainless steel castings with ultra low carbon and high cleanliness

Author

Lou Yanchun and Zhang Zhongqiu

Subjects
large martensitic stainless steel castings, ultra low carbon and high cleanliness, turbine runner and blade, Technology, Manufactures, TS1-2301
Abstract

The key manufacturing technologies associated with composition, microstructure, mechanical properties, casting quality and key process control for large martensitic stainless steel castings are involved in this paper. The achievements fully satisfied the technical requirements of the large 700 MW stainless steel hydraulic turbine runner for the Three Gorges Hydropower Station, and become the major technical support for the design and manufacture of the largest 700 MW hydraulic turbine generator unit in the world developed through our own efforts. The characteristics of a new high yield to tensile strength (Rp0.2/Rm) ratio and high obdurability martensitic stainless steel with ultra low carbon and high cleanliness are also described. Over the next ten years, the large martensitic stainless steel castings and advanced manufacturing technologies will see a huge demand in clean energy industry such as nuclear power, hydraulic power at home and abroad. Therefore, the new high yield o tensile strength (Rp0.2/Rm) ratio and high obdurability martensitic stainless steel materials, the fast and flexible manufacturing technologies of large size castings, and new environment friendly sustainable process will face new challenges and opportunities.

Published
2010

34. Research on the Teaching Mode of Algorithm Analysis and Design Course Based on the Integration of BOPPPS and SPOC

Author

Zhang Nana, Zhang Zhongqiu, and Ma Lei

Subjects
Information management, Enthusiasm, Logical reasoning, Process (engineering), Computer science, media_common.quotation_subject, ComputingMilieux_COMPUTERSANDEDUCATION, Teaching mode, Algorithm, Course (navigation), Learning effect, media_common
Abstract

As the core course of computer major, the course of algorithm analysis and design has the characteristics of high difficulty with theory and application. It plays an important role in cultivating students' logical thinking, analysis and problem-solving ability. The integration of BOPPPS teaching mode and SPOC teaching mode is applied to the teaching design and teaching practice of the course of algorithm analysis and design, which can comprehensively design the complete learning process of students from online to offline, cultivate students' learning habits, and effectively improve students' learning enthusiasm and learning effect. It is of great significance to teaching reform and teaching innovation.

Published
2021

40. Genetic Variation of Inflammatory Genes to Ischemic Stroke Risk in a Chinese Han Population

Author

Zhang,Zhongqiu, Mei,Yanping, Xiong,Mengqiu, Lu,Fang, Zhao,Xianghong, Zhu,Junrong, He,Bangshun, Zhang,Zhongqiu, Mei,Yanping, Xiong,Mengqiu, Lu,Fang, Zhao,Xianghong, Zhu,Junrong, and He,Bangshun

Abstract

Zhongqiu Zhang,1,2,* Yanping Mei,3,* Mengqiu Xiong,3 Fang Lu,1,2 Xianghong Zhao,1,2 Junrong Zhu,1,2 Bangshun He1,3 1School of Basic Medicine & Clinical Pharmacy, China Pharmaceutical University, Nanjing, 211198, Jiangsu Province, People’s Republic of China; 2Department of Pharmacy, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, Jiangsu Province, People’s Republic of China; 3Department of Laboratory Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, Jiangsu Province, People’s Republic of China*These authors contributed equally to this workCorrespondence: Bangshun HeDepartment of Laboratory Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, 210006, People’s Republic of ChinaEmail bhe@njmu.edu.cnJunrong ZhuDepartment of Pharmacy, Nanjing First Hospital, Nanjing Medical University, 68 Changle Road, Nanjing, Jiangsu Province, 210006, People’s Republic of ChinaEmail junrong_zhu@aliyun.comBackground: Inflammation proteins play an important role in stroke occurrence. IL1A, IL1B, PTGS2, MMP2, and MMP9 were the mediators involved in the immune response, and the association of these genetic variations with ischemic stroke (IS) risk was still unclear.Methods: To investigate the susceptibility of genetic variations of IL1A, IL1B, PTGS2, MMP2, and MMP9 to IS risk, we performed a case–control study involving 299 patients and 300 controls in a Chinese population. Thirteen genetic variations of investigated genes of all participants were genotyped using an improved multiplex ligase detection–reaction technique.Results: No SNP in all genes showed an association with overall IS. However, in subgroup analysis, PTGS2 rs689466 (dominant model: CT vs TT – ORadjusted= 2.51, 95% CI: 1.22– 5.16, p = 0.012; co-dominant model: CT/CC vs TT – ORadjusted= 2.53, 95% CI: 1.26– 5.07, p = 0.009; additive model – ORadjusted= 2.26, 95% CI: 1.19– 4.28, p = 0.013)

Published
2021

42. Game theory analysis on credit risk assessment in E-commerce

Author

Wei Xiu-jian, Zhang Zhongqiu, and Zhang Nana

Subjects
Government, Process (engineering), business.industry, Legislation, E-commerce, Library and Information Sciences, Management Science and Operations Research, Computer Science Applications, Microeconomics, Order (exchange), Media Technology, ComputingMilieux_COMPUTERSANDSOCIETY, Business, Game theory, Information Systems, Social economy, Credit risk
Abstract

With the development of network technology and social economy, e-commerce has been widely utilized around the world, while the E-commerce credit has become one of the most important issues. The credit risk in E-commerce is not only the result of game between different sellers, but also the result between online traders and managers. From the perspective of different sellers with same products or services, this paper analyzes and discusses the formation of credit risk in E-commerce based on the game theory, and presents some suggestions for future application of E-commerce credit. In order to reduce the loss caused by E-commerce credit risk, the government should play a macro-control role or participate in the game process as a participant to influence the game result. The government can guide enterprises’ game activities through legal and economic levers such as legislation, taxation, to make the results approached to the Pareto optimal solution, and the utility of the entire society will be increased.

Published
2022

43. Stability analysis of transmission tower foundations in permafrost equipped with thermosiphons and vegetation cover on the Qinghai-Tibet Plateau

Author

Zhang Zhongqiu, Xinbin Wang, Yuan Chang, Lei Guo, Xie Yanli, Qihao Yu, Yanhui You, and Tingtao Gou

Subjects
Fluid Flow and Transfer Processes, 010504 meteorology & atmospheric sciences, Settlement (structural), Mechanical Engineering, 0211 other engineering and technologies, Foundation (engineering), 02 engineering and technology, Condensed Matter Physics, Permafrost, 01 natural sciences, Current (stream), Infiltration (hydrology), Environmental science, Geotechnical engineering, Tower, Ponding, 021101 geological & geomatics engineering, 0105 earth and related environmental sciences, Transmission tower
Abstract

During the construction of the ±400 kV direct current power transmission line (DCPTL), frozen blocks were backfilled into the foundation pits in permafrost regions because of the lack of backfilling materials and other problems, but this resulted in less compact backfilled soils. To ensure the stability of the tower foundations, a large number of thermosiphons were installed. This study discusses the threat to the stability of tower foundations of water infiltration along the large voids created within the backfilled soils by the use of frozen blocks, and quantifies the efficacy of a combination of thermosiphons and vegetation cover in enhancing tower stability, based on field collected data from January 2011 to April 2017. The results indicate that the cooling effects of thermosiphons caused a large amount of net heat removal from the foundation soils, even during the first operational year of the foundation, while foundation soils without thermosiphons exhibited net heat input during the same period. Ponding in the pits and downward infiltration of water obviously work to warm the foundation soils, and can result in the settlement of the tower footings, threatening the tower stability. The combination of thermosiphons and vegetation cover is shown to effectively cool the foundation soils and to reduce the settlement of the footings, thus ensuring the continued tower stability. This study also shows that the backfilling of frozen blocks should be avoided in the current climate conditions, even though effective cooling measures like thermosiphons are used because the downward infiltration of water along the large voids between the frozen backfilled blocks can’t be totally prevented. If the current degradation of the frozen state of the backfilled soils continues, the infiltrated water, which has been frozen at the bottom of the backfill, will begin to thaw again, threatening the stability of the tower foundations.

Published
2018

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