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Article ; Online: Deconstruction and Realization of Sports Entity Simulation Based on Fish Swarm Algorithm

Kai Wu

Computational Intelligence and Neuroscience, Vol

2022 Volume 2022

Abstract: Due to the limitation of sports movement, the current simulation technology of sports entities is prone to deficiencies in capturing dynamic motion figures and is prone to lack of accuracy. It is also affected by external noise and brightness. To solve ... ...

Abstract	Due to the limitation of sports movement, the current simulation technology of sports entities is prone to deficiencies in capturing dynamic motion figures and is prone to lack of accuracy. It is also affected by external noise and brightness. To solve these problems, this paper proposes a sports entity simulation based on the fish swarm algorithm and compares the figure effectiveness, figure segmentation, core point, and noise reduction effect of the two in the shooting figure. Through the comparison, it is found that the figure is more appropriate to the real moving figure, the motion capture is more accurate, and the number of core points is related to the accuracy of motion capture. The more core points, the more accurate the motion capture, and the noise reduction effect is also increased by 20.3%, which reduces the impact of brightness on the motion simulation. The difference in the effect of the traditional simulation technology (particle swarm algorithm) and the entity simulation based on the fish swarm algorithm was also compared. The combination with the artificial fish swarm algorithm is to simulate the moving entity and learn from some reference data. By comparing the data between the two after the experiment, it is concluded that the fish swarm algorithm is more effective in the simulation of sports entities.
Keywords	Computer applications to medicine. Medical informatics ; R858-859.7 ; Neurosciences. Biological psychiatry. Neuropsychiatry ; RC321-571
Subject code	629
Language	English
Publishing date	2022-01-01T00:00:00Z
Publisher	Hindawi Limited
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Assessment of terrestrial ecosystem sensitivity to climate change in arid, semi-arid, sub-humid, and humid regions using EVI, LAI, and SIF products

Jiahao Chen / Han Yang / Tingyuan Jin / Kai Wu

Ecological Indicators, Vol 158, Iss , Pp 111511- (2024)

2024

Abstract: Arid and humid ecosystems are undergoing significant changes over the past decades due to the warming temperature and frequent occurrence of climate extremes. Quantifying climatic vegetation sensitivity in regions with different climate classifications ... ...

Abstract	Arid and humid ecosystems are undergoing significant changes over the past decades due to the warming temperature and frequent occurrence of climate extremes. Quantifying climatic vegetation sensitivity in regions with different climate classifications is crucial for understanding the interaction mechanisms between vegetation and ongoing climate change. However, such knowledge about the spatiotemporal variations of vegetation sensitivity and its climate driving factors in arid and humid regions is still unclear. Based on this consideration, a moving-window-based Vegetation Sensitivity Index (VSI) scheme was applied to Enhanced Vegetation Index (EVI), Leaf Area Index (LAI), and Solar-induced Chlorophyll Fluorescence (GOSIF) data to evaluate the spatiotemporal variations of terrestrial ecosystem in response to climate changes and explore its driving climatic factors from 2003 to 2020. Results indicated that high VSI (>60) was observed for tropical rainforests in humid regions and central Eurasia in semi-arid regions. By contrast, low VSI (<40) was typically observed in arid regions. Spatially, we found VSI exhibited a nonlinear parabolic variation along the gradient of aridity index in the arid and semi-arid regions but generally presented a linear variation with an upward trend in the humid regions. Temporally, VSI showed a significant declining trend over the past two decades but displayed a significantly increasing trend in arid areas. Temperature was the dominant climatic factor to explain the spatial variations of VSI globally, while precipitation mainly dominated the temporal variations of VSI. The dominant climatic factor of VSI varied across different aridity regions as temperature and precipitation were the main climate factor to drive spatiotemporal variations of VSI in humid and arid classifications, respectively. Our results provide unique insights into the vegetation sensitivity in response to ongoing and future climate change in regions with different climate classifications.
Keywords	Spatiotemporal variations ; Ecosystem sensitivity ; Climate change ; Arid and humid regions ; Ecology ; QH540-549.5
Subject code	910 ; 550
Language	English
Publishing date	2024-01-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Efficacy of adjuvant tyrosine kinase inhibitor therapy for non-small cell lung cancer and its influence on survival outcome

Kai Wu

Journal of Hainan Medical University, Vol 23, Iss 12, Pp 118-

2017 Volume 121

Abstract: Objective: To study the efficacy of adjuvant tyrosine kinase inhibitor therapy for non-small cell lung cancer and its influence on survival outcome. Methods: 92 patients with NSCLC who were treated in our hospital between March 2010 and March 2012 were ... ...

Abstract	Objective: To study the efficacy of adjuvant tyrosine kinase inhibitor therapy for non-small cell lung cancer and its influence on survival outcome. Methods: 92 patients with NSCLC who were treated in our hospital between March 2010 and March 2012 were collected and divided into the control group (n=50) who underwent normal treatment and the observation group (n=42) who underwent adjuvant tyrosine kinase inhibitor therapy + routine treatment after the therapies were reviewed. Serum contents of malignant molecules were compared between two groups before and after treatment, and the median survival time after treatment and 3-year survival rate were recorded. Results: Before treatment, differences in serum levels of tumor markers, angiogenesis indexes and apoptosis molecules were not statistically significant between two groups of patients. After treatment, serum tumor markers CYFRA21-1, SCC, ProGRP and CA125 levels of observation group were lower than those of control group, angiogenesis indexes VEGF, bFGF and PCDGF levels were lower than those of control group while ES and PEDF levels were higher than those of control group, and apoptosis indexes sFas and sFasL levels were higher than those of control group. The median survival time of observation group after treatment was longer than that of control group, and 3-year survival rate was significantly higher than that of control group. Conclusion: Adjuvant tyrosine kinase inhibitor therapy for NSCLC can effectively reduce the malignant degree of tumor and optimize the long-term survival outcome.
Keywords	Non-small cell lung cancer Tyrosine kinase inhibitor Tumor marker Angiogenesis ; Medicine ; R
Subject code	610
Language	English
Publishing date	2017-06-01T00:00:00Z
Publisher	Editorial Board of Journal of Hainan Medical University
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Can Green Credit Policy Promote the High-Quality Development of China’s Heavily-Polluting Enterprises?

Kai Wu / E Bai / Hejie Zhu / Zhijiang Lu / Hongxin Zhu

Sustainability, Vol 15, Iss 8470, p

2023 Volume 8470

Abstract: Prior literature on the green innovation effects of green credit policies is extensive. However, few scholars have focused on the impact of green credit policies on the high-quality development of heavily-polluting enterprises. Based on this, this study ... ...

Abstract	Prior literature on the green innovation effects of green credit policies is extensive. However, few scholars have focused on the impact of green credit policies on the high-quality development of heavily-polluting enterprises. Based on this, this study employs the difference-in-differences (DID) model to explore the causal relationship between the Green Credit Guidelines (Guidelines) issued in 2012 and the high-quality development of heavily-polluting enterprises. Additionally, we test whether the effect of upgrading human resources in enterprises strengthens this causal relationship. Our findings suggest that the implementation of the Guidelines has significantly promoted the development quality of heavily-polluting enterprises and the promotion effect is more significant in enterprises with higher development quality, state-owned enterprises, large-scale enterprises, and enterprises in the western region of China. Further research reveals that the effect of upgrading human resources in enterprises has reinforced the positive impact of Guidelines on the high-quality development of enterprises. From the perspective of high-quality development of enterprises, in this paper, we expand the research into the effects of green credit policy, providing a decision-making reference for the promotion and improvement of subsequent green credit policy in the future.
Keywords	green credit policy ; high-quality development ; human resource upgrading ; difference-in-differences method ; China ; Environmental effects of industries and plants ; TD194-195 ; Renewable energy sources ; TJ807-830 ; Environmental sciences ; GE1-350
Language	English
Publishing date	2023-05-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: A tripartite evolutionary game behavior analysis of the implementation strategy of the internal carbon pricing of enterprises under governments supervision

Kai Wu / E. Bai / Hejie Zhu / Zhijiang Lu / Hongxin Zhu

Heliyon, Vol 9, Iss 12, Pp e23131- (2023)

2023

Abstract: Internal Carbon Pricing (ICP) represents an innovative approach to carbon emission reduction. The implementation of the ICP involves enterprises and internal organizations, with its outcomes closely tied to government actions. In this study, a tripartite ...

Abstract	Internal Carbon Pricing (ICP) represents an innovative approach to carbon emission reduction. The implementation of the ICP involves enterprises and internal organizations, with its outcomes closely tied to government actions. In this study, a tripartite evolutionary game model comprising these subjects was constructed, and subsequent simulation analyses were conducted. The results revealed the following key findings: (1) When the combined total of carbon fees and governments' emission reduction subsidies surpasses the aggregate of carbon fees returned to internal organizations and ICP implementation costs, and when enterprises' revenues exceed governments' subsidies, all three parties will evolve towards ESS (1,1,1). This signifies that enterprises opt for the ICP, internal organizations actively reduce emissions, and governments engage in proactive regulation. (2) Reducing the cost of implementing ICP, increasing the carbon fee rebate ratio, raising governments' subsidies, and elevating the internal carbon price all contribute to promoting the attainment of the evolutionary game results ESS (1,1,1). However, it's important to note that higher governments' subsidies and carbon fee rebate ratios do not necessarily lead to a greater incentive for the three parties to reach the ESS(1,1,1). These findings provide a solid theoretical foundation for enterprises considering the implementation of the ICP in the future.
Keywords	Internal carbon pricing ; Carbon emission reduction ; Low-carbon economy ; Three-party evolutionary game ; Government supervision ; Science (General) ; Q1-390 ; Social sciences (General) ; H1-99
Subject code	320
Language	English
Publishing date	2023-12-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Effects of Voice and Lighting Color on the Social Perception of Home Healthcare Robots

Xiao Dou / Li Yan / Kai Wu / Jin Niu

Applied Sciences, Vol 12, Iss 12191, p

2022 Volume 12191

Abstract: The influence of matching between robots’ social cues on users’ social perceptions should be investigated systematically to better fit robots to their occupational roles. In this study, an experiment with 69 older and middle-aged participants was ... ...

Abstract	The influence of matching between robots’ social cues on users’ social perceptions should be investigated systematically to better fit robots to their occupational roles. In this study, an experiment with 69 older and middle-aged participants was conducted to explore the effects of the voice and lighting color of a home healthcare robot on users’ social perception, which was measured by the Robotic Social Attributes Scale (RoSAS). The results indicated that voice and lighting color significantly affected social perceptions of the healthcare robot. Specifically, the adopted robot received high warmth ratings when it had an adult female voice or a child voice, whereas it received high competence ratings when it had an adult male voice. The robot received a high warmth rating and a high competence rating when warm and cool lighting were used, respectively, as visual feedback. Furthermore, a mismatch in the robot’s voice and lighting color was discovered to evoke feelings of discomfort. The findings of this study can be used as a reference to design robots with acceptable social perception and to expand the roles of social robots in the future.
Keywords	social robots ; social perception ; robot voice ; human–robot interaction (HRI) ; Technology ; T ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Biology (General) ; QH301-705.5 ; Physics ; QC1-999 ; Chemistry ; QD1-999
Subject code	629
Language	English
Publishing date	2022-11-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Evaluating the Performance and Stability of the Highway Subgrades in Seismic Events, a Case Study of the Changning Earthquake, Sichuan

Zhen Cui / Maochu Zhang / Kai Wu / Hongsheng Ma

International Journal of Environmental Research and Public Health, Vol 19, Iss 14379, p

2022 Volume 14379

Abstract: On 17 June 2019, an M6.0 earthquake occurred in Changning County, Sichuan Province, China. Considerable highway subgrades were damaged in this earthquake. By investigating seismic damage of these subgrades, a systematical analysis of influence factors ... ...

Abstract	On 17 June 2019, an M6.0 earthquake occurred in Changning County, Sichuan Province, China. Considerable highway subgrades were damaged in this earthquake. By investigating seismic damage of these subgrades, a systematical analysis of influence factors and failure mode of the damages on highway subgrade have been given. There is a close relationship between the damaged degree of subgrade and the distance of epicenter, fault distance, and structure type of subgrade. The seismic hazard investigation shows that the seismic damage of the cut-and-fill subgrade was more severe than that of the fill subgrade. Taking the Changning earthquake ground motion record as input, 3D dynamic finite element analyses were performed. The seismic damage mechanisms of cut-and-fill subgrade and fill subgrade were revealed. The numerical simulation confirmed that the cut-and-fill subgrade was more easily damaged by earthquakes compared with the fill subgrade. The fill-and-cut interface of the cut-and-fill subgrade had a notable plastic strain band after the earthquake, and the permanent displacement of the slope top was significant. In this manner, the numerical results are consistent with seismic investigation data. Considering the seismic investigation data for highway subgrades are rare, this paper may provide effective references for aseismic design and deformation control of highway subgrades.
Keywords	earthquake ; fill subgrade ; seismic damage mode ; relative displacement ; dynamic response ; Medicine ; R
Subject code	500
Language	English
Publishing date	2022-11-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Review of Industrial Robot Stiffness Identification and Modelling

Kai Wu / Jiaquan Li / Huan Zhao / Yong Zhong

Applied Sciences, Vol 12, Iss 8719, p

2022 Volume 8719

Abstract: Due to their high flexibility, large workspace, and high repeatability, industrial robots are widely used in roughing and semifinishing fields. However, their low machining accuracy and low stability limit further development of industrial robots in the ... ...

Abstract	Due to their high flexibility, large workspace, and high repeatability, industrial robots are widely used in roughing and semifinishing fields. However, their low machining accuracy and low stability limit further development of industrial robots in the machining field, with low stiffness being the most significant factor. The stiffness of industrial robots is affected by the joint deformation, transmission mechanism, friction, environment, and coupling of these factors. Moreover, the stiffness of a robot has a nonlinear distribution throughout the workspace, and external forces during processing cause irregular deviations of the robot, thereby affecting the machining accuracy and surface quality of the workpiece. Many scholars have researched identifying the stiffness of industrial robots and have proposed methods for improving the performance of industrial robots, mainly by optimizing the body structure of the robot and compensating for deformation errors with stiffness models. This paper reviews recent research on the stiffness modelling of industrial robots, which can be broadly classified as finite element analysis (FEA), matrix structure analysis (MSA), and virtual joint modelling (VJM) methods. Each method is studied from three aspects: algorithms, implementation, and limitations. In addition, common measurement techniques have been introduced for measuring deformation. Further research directions are also discussed.
Keywords	robotic machining ; position compensation ; stiffness modelling ; FEA ; MSA ; VJM ; Technology ; T ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Biology (General) ; QH301-705.5 ; Physics ; QC1-999 ; Chemistry ; QD1-999
Subject code	629
Language	English
Publishing date	2022-08-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Aerodynamics of two parallel bristled wings in low Reynolds number flow

Yu Kai Wu / Yan Peng Liu / Mao Sun

Scientific Reports, Vol 12, Iss 1, Pp 1-

2022 Volume 15

Abstract: Abstract Most of the smallest flying insects use bristled wings. It was observed that during the second half of their upstroke, the left and right wings become parallel and close to each other at the back, and move upward at zero angle of attack. In this ...

Abstract	Abstract Most of the smallest flying insects use bristled wings. It was observed that during the second half of their upstroke, the left and right wings become parallel and close to each other at the back, and move upward at zero angle of attack. In this period, the wings may produce drag (negative vertical force) and side forces which tend to push two wings apart. Here we study the aerodynamic forces and flows of two simplified bristled wings experiencing such a motion, compared with the case of membrane wings (flat-plate wings), to see if there is any advantage in using the bristled wings. The method of computational fluid dynamics is used in the study. The results are as follows. In the motion of two bristled wings, the drag acting on each wing is 40% smaller than the case of a single bristled wing conducting the same motion, and only a very small side force is produced. But in the case of the flat-plate wings, although there is similar drag reduction, the side force on each wing is larger than that of the bristled wing by an order of magnitude (the underlying physical reason is discussed in the paper). Thus, if the smallest insects use membrane wings, their flight muscles need to overcome large side forces in order to maintain the intended motion for less negative lift, whereas using bristled wings do not have this problem. Therefore, the adoption of bristled wings can be beneficial during upward movement of the wings near the end of the upstroke, which may be one reason why most of the smallest insects adopt them.
Keywords	Medicine ; R ; Science ; Q
Subject code	590
Language	English
Publishing date	2022-06-01T00:00:00Z
Publisher	Nature Portfolio
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Analysis on Response of a Single Pile Subjected to Tension Load Considering Excavation Effects

Zan Li / Songyu Liu / Kai Wu / Taishan Lu

Applied Sciences, Vol 12, Iss 6717, p

2022 Volume 6717

Abstract: With the development of urbanization, numerous excavations are carried out to facilitate the development of underground space. As a support for tunnel structures, uplift piles are often installed prior to tunnel excavation. The excavation inevitably ... ...

Abstract	With the development of urbanization, numerous excavations are carried out to facilitate the development of underground space. As a support for tunnel structures, uplift piles are often installed prior to tunnel excavation. The excavation inevitably causes disturbance to the soil below the excavation surface, changing the soil’s mechanical behavior and stress state significantly. However, there is still a lack of a method to evaluate the change in pile capacity due to excavation. This paper proposes a semi-analytical approach for estimating the change in load-settlement behavior of an uplift pile considering the effects of excavation. A hyperbolic model was adopted to simulate the nonlinear interaction of the pile–soil interface. The nonlinear shear-induced soil displacement outside the pile–soil interface is introduced to obtain a more realistic load-displacement behavior of the uplift pile. An effective iterative program was implemented based on the proposed semi-analytical approach. The comparisons between the results from the proposed methods, well-documented field tests, centrifuge tests, and other analytical methods showed that the proposed approach is suitable for analyzing an uplift pile considering excavation effects. A parametric study was conducted to investigate the effects of main soil properties on the pile capacity loss caused by excavation. The results showed that the soil friction angle and the ratio of the excavation depth to the pile effective length have a great influence on the loss in pile uplift capacity caused by excavation. However, the loss of pile uplift capacity caused by excavation is not affected by the soil’s shear modulus or Poisson’s ratio.
Keywords	uplift pile ; load-transfer method ; excavation ; load-displacement behavior ; Technology ; T ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Biology (General) ; QH301-705.5 ; Physics ; QC1-999 ; Chemistry ; QD1-999
Subject code	690
Language	English
Publishing date	2022-07-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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