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Frontiers of Mechanical Engineering 2021年第2期16卷 353-362页

作者： Hui li ruiqin li Jianwei ZHANG School of Mechanical Engineering North University of ChinaTaiyuan 030051China Department of Mining Engineering Lvliang UniversityLvliang 033001China Department of Informatics University of HamburgHamburg 22527Germany

This study proposes a gained switching-based discrete-time sliding mode control method to address the chattering issue in disturbed discrete-time systems, which suffer from various unknown uncertainties. Through the new structure of the designed reaching law, the proposed method can effectively increase the convergence speed while guaranteeing chattering-free control. The performance of controlling underactuated robotic systems can be further improved by the adoption of fuzzy logic to perform adaptive online hyper-parameter tuning. In addition, an underactuated robotic system with uncertainties is studied to validate the effectiveness of the proposed reaching law. Results reveal the dynamic performance and robustness of the proposed reaching law in the studied system and prove the proposed method’s superiority over other state-of-the-art methods.

关键词： sliding-mode control robot control discrete-time uncertain systems fuzzy logic

The Path of Rural Revitalization in Rapidly Urbanizing Areas: Taking Southern Jiangsu as an Example

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China City Planning Review 2018年第4期27卷 24-33页

作者： Zhao Yi Zhang Fei li ruiqin li Caige Jiangsu Institute of Urban & Rural Planning and Design

Issues relating to agriculture, countryside, and farmers(called "sannong" in Chinese) are fundamental to China as they directly influence the stability of the country and the well-being of Chinese people. The 19 th CPC National Congress proposed a strategy of rural revitalization, giving priority to the development of "sannong" to promote the modernization of agriculture and the countryside. Since China's reform and opening up, Southern Jiangsu has experienced rapid urbanization and industrialization along with the development of township and village industries, making its urbanization rate reaching 75.9%. While significant achievements have been made in urban and rural development, there are still many challenges in rural revitalization. Based on analysis on the characteristics and problems of rural development in Southern Jiangsu, this paper, aiming at rural revitalization, puts forward methods and paths of rural revitalization, such as value cognition, layout optimization, industrial revitalization, ecological livability, and rural governance, which are of practical significance to promote the integrated urban-rural development and the healthy rural development in the region and to provide a reference of rural development for other areas of the country.

关键词： characteristics and problems of rural development rural revitalization rapidly urbanizing area Southern Jiangsu

Recalescence Velocity and Microstructure Evolution of Deeplyundercooled Cu_(65)Ni_(35) Alloy

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Journal of Wuhan University of Technology(Materials Science) 2022年第2期37卷 277-284页

作者： liANG Hailong CHENG Tang li ruiqin WANG Hongfu YANG Jine XIE Jinpeng ZHAO Yuhong College of Mechanical Engineering North University of ChinaTaiyuan 030051China College of Materials Science and Engineering North University of ChinaTaiyuan 030051China Shanxi College of Technology Shuozhou 036000China Jiangsu Yingchuang Power Technology Co.Ltd Suzhou 215000China

The Cu_(65)Ni_(35) alloy liquid was undercooled by the fluxing method,and the rapid solidification structure was obtained by natural *** solidification interface migration information of Cu_(65)Ni_(35) alloy liquid in rapid solidification stage was photographed with the help of high-speed camera,and the recalescence velocity was *** microstructure evolution of the alloy was systematically studied by observing the microstructure morphology and taking photos on the metallographic *** analyzing the evolution of dendrite grain size and microstructure microhardness with undercoolingand relying on electron backscatter diffraction(EBSD)technology,the grain refinement mechanism of microstructure under high undercooling and low undercooling is finally confirmed.

关键词： rapid solidification recalescence velocity microstructure evolution

Neural Network Based Multi-level Fuzzy Evaluation Model for Mechanical Kinematic Scheme

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武汉理工大学学报 2006年第S1期28卷 301-306页

作者： BO Ruifeng,li ruiqin (Department of Mechanical Engineering,North University of China,Taiyuan 030051,China) Department of Mechanical Engineering North University of ChinaTaiyuan 030051China

To implement a quantificational evaluation for mechanical kinematic scheme more effectively,a multi-level and multi-objective evaluation model is presented using neural network and fuzzy theory. Firstly,the structure of evaluation model is constructed according to evaluation indicator system. Then evaluation samples are generated and provided to train this model. Thus it can reflect the relation between attributive value and evaluation result,as well as the weight of evaluation indicator. Once evaluation indicators of each candidate are fuzzily quantified and fed into the trained network model,the corresponding evaluation result is outputted and the best alternative can be selected. Under this model,expert knowledge can be effectively acquired and expressed,and the quantificational evaluation can be implemented for kinematic scheme with multi-level evaluation indicator system. Several key problems on this model are discussed and an illustration has demonstrated that this model is feasible and can be regarded as a new idea for solving kinematic scheme evaluation.

关键词： neural network mechanical kinematic scheme multi-level evaluation model fuzzy

基于模糊效用值排序的模糊层次分析法在机械运动方案优选中的应用

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中国机械工程 2007年第18期18卷 2174-2178页

作者：薄瑞峰李瑞琴中北大学

为了有效地对机械运动方案进行优选决策,在层次分析法的基础上,引入群决策方法和模糊效用值排序理论,提出一种基于三标度法的群体多准则模糊层次分析法。在多人决策情况下,首先利用简化的三标度法直接生成一致性的判断矩阵,在充分考虑... 详细信息

为了有效地对机械运动方案进行优选决策,在层次分析法的基础上,引入群决策方法和模糊效用值排序理论,提出一种基于三标度法的群体多准则模糊层次分析法。在多人决策情况下,首先利用简化的三标度法直接生成一致性的判断矩阵,在充分考虑决策者和决策对象不确定性的同时,将群体意见集成到三角模糊数中,最后通过模糊数总效用值排序获得各方案优先顺序。实例表明,该方法简化了分析过程,同时又综合了群体的意见,从而为机械运动方案优选提供了一种实用化方法。

关键词：层次分析法群体多准则决策机械运动方案模糊数效用值排序

Observation on the Curative Effect of Auricular Acupoint Sticking Combined with Acupoint Sticking in the Treatment of Diabetic Constipation

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Journal of Clinical and Nursing Research 2022年第4期6卷 56-60页

作者： ruiqin li Tingwei He Wenmin Wang Zongliang Song Affiliated Hospital Shaanxi University of Chinese Medicine Xianyang 712000China

The study was conducted to observe the clinical effect of acupoint and auricular point application on diabetes patients with *** 104 patients with diabetes and constipation were selected from the Hospital Shaanxi University of Chinese Medicine from February 2021 to February 2022 as the study *** were divided into groups by drawing *** experimental group carried out the combined analysis of acupoint and auricular point application based on the treatment methods of the control ***,the control group carried out the traditional treatment,and the evaluation index,including the improvement of constipation and the clinical effective rate data were included in the *** study showed that,the total effective number of patients,times of defecation per week,time of defecation,and interval of defecation in the experimental group were greater,compared to control group(plication can effectively improve the constipation symptoms,shorten the defecation time,improve the cure rate of the disease,and ensure the normal defecation cycle in the patients.

关键词： Auricular acupoint pressing Acupoint application Diabetes constipation Treatment effect

Clinical Experience in Using Zishui Qinggan Decoction in the Treatment of Perimenopausal Gall Disease

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Journal of Clinical and Nursing Research 2022年第3期6卷 104-107页

作者： Wenmin Wang ruiqin li Tingwei He Zongliang Song Affiliated Hospital of Shaanxi University of Chinese Medicine Xianyang 712000Shaanxi ProvinceChina

Objective:To explore the clinical experience in using Zishui Qinggan decoction in the treatment of perimenopausal gall ***:By comparing the clinical effects of two groups of patients under different methods of treatment,100 patients with perimenopausal gall disease who visited the hospital from January 2022 to February 2022 were selected as the research subjects of this *** to the methods of treatment,the patients were divided into two groups:the conventional group comprised of 50 patients who received conventional medication,whereas the Zishui Qinggan decoction group comprised of the other 50 patients who received Zishui Qinggan *** overall clinical effects of the two groups were compared along with the time required for symptom relief Results:The time required for symptom relief in the Zishui Qinggan decoction group was significantly shorter than that in the conventional group(plief.

关键词： Perimenopausal gall disease Zishui Qinggan decoction

Clinical Effect of Laser Treatment Combined with Compound Xueshuantong Capsule in the Treatment of Diabetic Retinopathy

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Proceedings of Anticancer Research 2022年第2期6卷 10-13页

作者： Tingwei He Wenmin Wang ruiqin li Zongliang Song Affiliated Hospital of Shaanxi University of Chinese Medicine Xianyang 712000Shaanxi ProvinceChina

Objective:To determine the clinical value of compound Xueshuantong capsule in the treatment of diabetic retinopathy on the basis of laser ***:Data were collected from 98 patients with diabetic retinopathy from February 2021 to February *** were divided into two groups by drawing *** experimental group was treated with compound Xueshuantong capsule and laser treatment,whereas the control group was treated with laser treatment ***:The absorption of exudation,resolution of retinal edema,and absorption of bleeding took longer in the control group;the incidence of visual acuity recovery to more than 0.5 and the patients’blood glucose levels were better in the experimental group,plitation efficiency of patients with diabetic retinopathy as well as stabilize their blood sugar *** has high clinical application value.

关键词： Laser treatment Compound Xueshuantong capsule Diabetic retinopathy Clinical effect

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可重构性和解耦性轮腿式机械腿构型综合方法

兵工学报 2024年第8期45卷 2658-2666页

作者：潘武星李瑞琴中北大学机械工程学院山西太原030051

基于螺旋理论和可重构机构运动分岔原理,综合出一组完全解耦的可重构轮腿式混联机械腿构型。根据机械腿轮、腿模式自由度需求,分析了机械腿轮腿变换机理,进而综合和筛选出5种主运动支链。基于轮腿变换机理,提出约束支链布局原理和方案,... 详细信息

基于螺旋理论和可重构机构运动分岔原理,综合出一组完全解耦的可重构轮腿式混联机械腿构型。根据机械腿轮、腿模式自由度需求,分析了机械腿轮腿变换机理,进而综合和筛选出5种主运动支链。基于轮腿变换机理,提出约束支链布局原理和方案,基于螺旋理论构造约束支链,根据主运动支链及约束支链几何条件,进行运动副轴线变换及运动副分解、组合,最终得到134种约束支链。基于并联机构运动解耦概念,导出驱动副选取条件,确定各约束支链上的驱动副位置。通过实例验证机械腿的可重构性和解耦性。研究结果表明:综合出的机械腿基于约束奇异实现轮腿模式切换,减少了构态变换所需的时间消耗,使模式切换更加高效;由于结构约束的存在,轮式运动时,无需锁死与腿模式运动相关的关节,减少了能量消耗及驱动控制难度。

关键词：轮腿式机械腿构型综合约束支链可重构性解耦性

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产品内贸易与传统贸易模式对发展中国家经济增长影响的差异性研究——基于中国的实证分析

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世界经济研究 2010年第2期 62-67页

作者：李瑞琴中央财经大学金融学院

产品内贸易模式和传统贸易模式将会对一国的长期经济增长带来不同的影响,本文分别从理论和实证的角度对这一问题进行了论证。理论分析部分我们主要从五个方面阐述了两种贸易模式对一国长期经济增长影响的差异性,并认为产品内贸易模式能... 详细信息

产品内贸易模式和传统贸易模式将会对一国的长期经济增长带来不同的影响,本文分别从理论和实证的角度对这一问题进行了论证。理论分析部分我们主要从五个方面阐述了两种贸易模式对一国长期经济增长影响的差异性,并认为产品内贸易模式能够为一国长期的经济增长带来更大的推动作用。实证分析部分我们以中国为研究对象,分别以加工贸易和一般贸易作为产品内贸易和传统贸易的典型代表,首先采用协整的分析方法证明了本文理论分析的结论。然后,我们利用脉冲响应函数研究了两种贸易模式对一国经济增长的动态影响。最后,我们又通过面板数据的回归分析,简要说明了影响产品内贸易对一国经济增长作用的主要因素。通过本文的分析我们认为,要大力提高我国参与国际产品内贸易的规模和水平,以更好地促进我国经济的长期健康增长。

关键词：产品内贸易传统贸易加工贸易一般贸易发展中国家经济增长