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您的检索式：作者名="Shutong Ren"
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| 1 | Path Planning Based on the Improved RRT^(∗) Algorithm for the Mining Truck显示文摘Planning a reasonable driving path for trucks in mining areas is a key point to improve mining efficiency.In this paper,a path planning method based on Rapidly-exploring Random Tree Star(RRT∗)is proposed,and several optimizations are carried out in the algorithm.Firstly,the selection process of growth target points is optimized.Secondly,the process of selecting the parent node is optimized and a Dubins curve is used to constraint it.Then,the expansion process from tree node to random point is optimized by the gravitational repulsion field method and dynamic step method.In the obstacle detection process,Dubins curve constraint is used,and the bidirectional RRT∗algorithm is adopted to speed up the iteration of the algorithm.After that,the obtained paths are smoothed by using the greedy algorithm and cubic B-spline interpolation.In addition,to verify the superiority and correctness of the algorithm,an unmanned mining vehicle kinematic model in the form of frontwheel steering is developed based on the Ackermann steering principle and simulated for CoppeliaSim.In the simulation,the Stanley algorithm is used for path tracking and Reeds-Shepp curve to adjust the final parking attitude of the truck.Finally,the experimental comparison shows that the improved bidirectional RRT∗algorithm performs well in the simulation experiment,and outperforms the common RRT∗algorithm in various aspects. | Dong Wang Shutong Zheng Yanxi Ren Danjie Du | 2022 | Computers, Materials & Continua2022，，5： | 0 |
| 2 | Association between Hepatitis B virus and gastric cancer:A systematic review and meta-analysis显示文摘An increasing number of studies are suggesting that hepatitis B virus(HBV)infection may be associated with an increased risk of not only hepatocellular carcinoma but also gastric cancer(GC).Whether HBV infection can be a risk factor for GC remains to be explored.In this study,we systematically searched for all eligible literature in 7 databases(China National Knowledge Infrastructure,WanFang,China Science and Technology Journal,PubMed,Cochrane Library,Web of Science and Embase).Eligible studies were required to have a case-control or cohort design.Sixteen studies were included and a meta-analysis was performed using Stata version 17.0.The quality of the included studies was assessed using the Newcastle-Ottawa Scale.The association between HBV infection and risk of GC was quantified by calculating the odds ratio and 95%confidence interval.The proportion of high-quality studies was 87.5%(14/16).The risk of GC was higher when HBV infection was present than when it was not(combined odds ratio 1.29,95%confidence interval 1.16-1.44;I^(2)=62.7%,p<0.001).The results of subgroup analyses were consistent with the main results.In conclusion,this systematic review and meta-analysis identified a positive association between HBV infection and an increased risk of GC. | Rong Yu Jingru Huang Hewei Peng Shuo Yin Weijiang Xie Shutong Ren Xian-E Peng | 2023 | Infectious Medicine2023，2，2： | 0 |
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