A design and verification of linear state observers which estimate state information such as angular velocity and load torque for retraction control of the motorized seat belt (MSB) system were described. The motorize...A design and verification of linear state observers which estimate state information such as angular velocity and load torque for retraction control of the motorized seat belt (MSB) system were described. The motorized seat belt system provides functions to protect passengers and improve passenger's convenience. Each MSB function has its own required belt tension which is determined by the function's purpose. To realize the MSB functions, state information, such as seat belt winding velocity and seat belt tension are required. Using a linear state observer, the state information for MSB operations can be estimated without sensors. To design the linear state observer, the motorized seat belt system is analyzed and represented as a state space model which contains load torque as an augmented state. Based on the state space model, a linear state observer was designed and verified by experiments. Also, the retraction control of the MSB algorithm using linear state observer was designed and verified on the test bench. With the designed retraction control algorithm using the linear state observer, it is possible to realize various types of MSB functions.展开更多
The purpose of this article is to study the weak and strong convergence of implicit iteration process with errors to a common fixed point for a finite family of asymptotically nonexpansive mappings and nonexpansive ma...The purpose of this article is to study the weak and strong convergence of implicit iteration process with errors to a common fixed point for a finite family of asymptotically nonexpansive mappings and nonexpansive mappings in Banach spaces. The results presented in this article extend and improve the corresponding results of [1, 2, 4-9, 11-15].展开更多
Let C be a closed bounded convex subset of a uniformaly convex Banach space X with a Frechet differentiable norm, F= {T(t):t ≥0} an asymptotically noncxpansivc semigroup on C, and u:[0,∞)→ C an almost-orbit of F. T...Let C be a closed bounded convex subset of a uniformaly convex Banach space X with a Frechet differentiable norm, F= {T(t):t ≥0} an asymptotically noncxpansivc semigroup on C, and u:[0,∞)→ C an almost-orbit of F. Then we show that {u(t):t ≥ 0} is almost convergent weakly to a common fixed point y of F, that isweak - lim1/tdr - y uniformly in s≥ 0.This implies that {u(t):t≥ 0} converges weakly to y if and onlyif u is weakly asymptotically regular, i.e lim (u(t + s) - u(t) = 0 weakly for all s≥ 0.展开更多
目的分析脑血管病领域撤稿论文特征,为脑血管病领域论文质量控制提供基础数据。方法通过关键词检索和筛选撤稿观察数据库,形成脑血管病领域被撤稿论文分析数据集,参考既往文献和政策文件对撤稿原因进行分类;通过Web of Science查询被撤...目的分析脑血管病领域撤稿论文特征,为脑血管病领域论文质量控制提供基础数据。方法通过关键词检索和筛选撤稿观察数据库,形成脑血管病领域被撤稿论文分析数据集,参考既往文献和政策文件对撤稿原因进行分类;通过Web of Science查询被撤稿论文的引用情况;按照文章类型、发表和撤稿时间、发表期刊及出版商、被引用情况、国家/地区分布及国际合作情况、撤稿时滞、撤稿原因及学术不端相关原因对被撤稿论文进行归类和分析。结果本研究共纳入386篇被撤稿论文,结果显示:被撤稿论文以研究性论文为主,共计334篇(86.53%);撤稿时间集中在2021—2024年的论文有273篇(70.73%);涉及撤稿期刊151种,出版商46个,撤稿数量≥10篇的期刊有5种,撤稿数量排名前9的出版商撤稿数量共计286篇(74.09%);涉及撤稿国家/地区31个,其中撤稿数量≥10篇的国家有3个,分别为中国、日本和美国。被撤稿文章的平均撤稿时滞为1218.09 d,中位撤稿时滞为609.50(338.25~1517.00)d;平均被引次数为19.61次,中位被引用次数为8.00(2.00~24.75)次。撤稿原因分析显示,因“学术不端”被撤稿论文最多,共计295篇(76.42%);其次是“不可重复”和“调查”,分别为242篇(62.69%)和232篇(60.10%)。295篇因“学术不端”被撤稿论文中,“同行评议问题”和“论文工厂”是最主要的撤稿原因,分别为129篇(43.73%)和110篇(37.29%)。撤稿原因分析还显示被撤稿论文涉及79种具体撤稿原因,其中“期刊/出版商调查”是出现频率最高的原因,涉及论文183篇(47.41%)。结论近年来脑血管病领域撤稿事件多发,被撤稿论文中学术不端问题形势严峻,因此脑血管病领域研究需重视科研诚信问题。展开更多
基金Project supported by the Second Stage of Brain Korea 21 Projects and Changwon National University in 2011-2012
文摘A design and verification of linear state observers which estimate state information such as angular velocity and load torque for retraction control of the motorized seat belt (MSB) system were described. The motorized seat belt system provides functions to protect passengers and improve passenger's convenience. Each MSB function has its own required belt tension which is determined by the function's purpose. To realize the MSB functions, state information, such as seat belt winding velocity and seat belt tension are required. Using a linear state observer, the state information for MSB operations can be estimated without sensors. To design the linear state observer, the motorized seat belt system is analyzed and represented as a state space model which contains load torque as an augmented state. Based on the state space model, a linear state observer was designed and verified by experiments. Also, the retraction control of the MSB algorithm using linear state observer was designed and verified on the test bench. With the designed retraction control algorithm using the linear state observer, it is possible to realize various types of MSB functions.
基金The present studies were supported by the Natural Science Foundation of Zhe-jiang Province (Y605191)the Natural Science Foundation of Heilongjiang Province (A0211)the Key Teacher Creating Capacity Fund of Heilongjiang General College (1053G015)the Scientific Research Foundation from Zhejiang Province Education Committee (20051897)the Starting Foundation of Scientific Research from Hangzhou Teacher's College.
文摘The purpose of this article is to study the weak and strong convergence of implicit iteration process with errors to a common fixed point for a finite family of asymptotically nonexpansive mappings and nonexpansive mappings in Banach spaces. The results presented in this article extend and improve the corresponding results of [1, 2, 4-9, 11-15].
文摘Let C be a closed bounded convex subset of a uniformaly convex Banach space X with a Frechet differentiable norm, F= {T(t):t ≥0} an asymptotically noncxpansivc semigroup on C, and u:[0,∞)→ C an almost-orbit of F. Then we show that {u(t):t ≥ 0} is almost convergent weakly to a common fixed point y of F, that isweak - lim1/tdr - y uniformly in s≥ 0.This implies that {u(t):t≥ 0} converges weakly to y if and onlyif u is weakly asymptotically regular, i.e lim (u(t + s) - u(t) = 0 weakly for all s≥ 0.
文摘目的分析脑血管病领域撤稿论文特征,为脑血管病领域论文质量控制提供基础数据。方法通过关键词检索和筛选撤稿观察数据库,形成脑血管病领域被撤稿论文分析数据集,参考既往文献和政策文件对撤稿原因进行分类;通过Web of Science查询被撤稿论文的引用情况;按照文章类型、发表和撤稿时间、发表期刊及出版商、被引用情况、国家/地区分布及国际合作情况、撤稿时滞、撤稿原因及学术不端相关原因对被撤稿论文进行归类和分析。结果本研究共纳入386篇被撤稿论文,结果显示:被撤稿论文以研究性论文为主,共计334篇(86.53%);撤稿时间集中在2021—2024年的论文有273篇(70.73%);涉及撤稿期刊151种,出版商46个,撤稿数量≥10篇的期刊有5种,撤稿数量排名前9的出版商撤稿数量共计286篇(74.09%);涉及撤稿国家/地区31个,其中撤稿数量≥10篇的国家有3个,分别为中国、日本和美国。被撤稿文章的平均撤稿时滞为1218.09 d,中位撤稿时滞为609.50(338.25~1517.00)d;平均被引次数为19.61次,中位被引用次数为8.00(2.00~24.75)次。撤稿原因分析显示,因“学术不端”被撤稿论文最多,共计295篇(76.42%);其次是“不可重复”和“调查”,分别为242篇(62.69%)和232篇(60.10%)。295篇因“学术不端”被撤稿论文中,“同行评议问题”和“论文工厂”是最主要的撤稿原因,分别为129篇(43.73%)和110篇(37.29%)。撤稿原因分析还显示被撤稿论文涉及79种具体撤稿原因,其中“期刊/出版商调查”是出现频率最高的原因,涉及论文183篇(47.41%)。结论近年来脑血管病领域撤稿事件多发,被撤稿论文中学术不端问题形势严峻,因此脑血管病领域研究需重视科研诚信问题。
