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人体下肢康复装置的结构设计及运动学分析

机械传动 2024年第9期48卷 76-81页

作者：张恩惠赵长荣任士超东北林业大学机电工程学院黑龙江哈尔滨150040

介绍了一种基于平面五杆机构的人体下肢康复装置,旨在满足术后卧床的卒中患者的早、中、后期的下肢康复训练需求。该装置具有简单可靠的特点,可以在床尾侧放置或随患者行走移动。装置主要由下部移动平台、手动升降组件、上部动力传动机... 详细信息

介绍了一种基于平面五杆机构的人体下肢康复装置,旨在满足术后卧床的卒中患者的早、中、后期的下肢康复训练需求。该装置具有简单可靠的特点,可以在床尾侧放置或随患者行走移动。装置主要由下部移动平台、手动升降组件、上部动力传动机构及左、右训练机构组成,并在踝、膝关节通用的关节支架上附有传感器,患者的运动信息可以被实时采集和反馈。运动学分析及Adams软件仿真结果表明,调整该装置双曲柄的初始相位,可以改变关节点的运动轨迹,得到不同运动模式下人体下肢关节运动的范围,达到卧式训练及行走训练的目的,从而满足患者不同康复阶段的训练需求。

关键词：下肢康复装置平面五杆机构结构设计运动学分析 Adams仿真

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净醛抗菌饰面人造板分析研究

科技资讯 2024年第6期22卷 108-110页

作者：金祥龙任士超广州欧派集成家居有限公司广东广州510403

研究净醛抗菌组合物与净醛抗菌饰面人造板的制备工艺,分析净醛抗菌饰面人造板的净醛、抗菌、防霉和去TVOC等环保性能。结果表明:以甲壳素、医用级2-咪唑烷酮、N掺杂改性纳米TiO_(2)或纳米硅片为主要原料,经过高速搅拌混合均匀后,按照一... 详细信息

研究净醛抗菌组合物与净醛抗菌饰面人造板的制备工艺,分析净醛抗菌饰面人造板的净醛、抗菌、防霉和去TVOC等环保性能。结果表明:以甲壳素、医用级2-咪唑烷酮、N掺杂改性纳米TiO_(2)或纳米硅片为主要原料,经过高速搅拌混合均匀后,按照一定比例添加在浸渍胶膜饰面纸浸胶工艺中并将其充分溶解,所制备的净醛抗菌饰面人造板,具有良好的净醛、抗菌、防霉、去TVOC等功效。

关键词：净醛抗菌饰面人造板环保性能

基于CNN-SVM的船舶电力推进系统故障诊断技术研究

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科技创新与应用 2024年第22期14卷 1-4页

作者：任世超邢高举李浩郑州机电工程研究所郑州450000

综合电力推进系统是现代船舶技术的跨越式发展,对解决船舶动力平台问题具有重要意义。为避免因电气设备运行故障对船舶运行安全性的影响,该文研究基于卷积神经网络和支持向量机融合的故障诊断方法。通过CNN来提取船舶电力推进系统故障... 详细信息

综合电力推进系统是现代船舶技术的跨越式发展,对解决船舶动力平台问题具有重要意义。为避免因电气设备运行故障对船舶运行安全性的影响,该文研究基于卷积神经网络和支持向量机融合的故障诊断方法。通过CNN来提取船舶电力推进系统故障信号的深层特征,将其作为故障分类器的输入,然后由SVM分类器进行故障分类。通过仿真实验后,发现学习率为0.001时,惩罚因子为1.5时,对应的故障诊断准确率最高,抗干扰能力较强。利用CNN和SVM融合的故障诊断方法,可有效提升船舶电力推进系统电气设备运行的可靠性,根据船舶电气系统运行特点,不断完善故障诊断方法,进一步推进我国船舶技术的发展进程。

关键词：船舶电力推进系统故障诊断特征提取信号

宿迁三台山国家森林公园春季鸟类多样性研究及智能声纹监测方法应用

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环境监控与预警 2024年第5期16卷 76-82页

作者：任诗超马士胜张悦纪轩禹江苏省生态环境监测监控有限公司江苏南京210019 江苏省环境监测中心江苏南京210019

为了解宿迁三台山国家森林公园春季鸟类状况,于2024年3—5月,采用样线法、声纹监测法对公园内春季鸟类多样性进行连续调查,共布设8个声纹监测点位及8条样线,采用香农维纳(Shannon-Wiener)多样性指数、皮耶罗(Pielou)均匀度指数进行多样... 详细信息

为了解宿迁三台山国家森林公园春季鸟类状况,于2024年3—5月,采用样线法、声纹监测法对公园内春季鸟类多样性进行连续调查,共布设8个声纹监测点位及8条样线,采用香农维纳(Shannon-Wiener)多样性指数、皮耶罗(Pielou)均匀度指数进行多样性分析,利用深度学习模型对收集到的鸟类鸣声进行物种自动识别。春季共记录到鸟类133种,其中国家二级重点保护鸟类11种。居留型方面,留鸟43种,旅鸟30种,夏候鸟44种,冬候鸟16种。样线法调查到鸟类87种,累计1452只,声纹监测到鸟类119种。样线调查法结果表明,Shannon-Wiener多样性指数为3.553,Pielou均匀度指数为0.796,鸟类多样性丰富,但受生境类型及人为干扰影响较大。同时根据声纹监测法可24 h连续性监测的特点,分析了杜鹃科和鸱鸮科典型鸟类的日活动节律。通过对比人工调查与声纹监测,发现智能声纹监测在时间、空间、物种数、监测频次、夜间活动和难以目测观察到的鸟类等多尺度上都展现出较强的优势,在鸟类多样性监测与保护中有较好的应用效果。

关键词：鸟类多样性智能声纹监测日活动节律三台山国家森林公园

成都市鸟类多样性时空分布格局及热点区域识别

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南京林业大学学报（自然科学版） 2024年第5期48卷 189-196页

作者：任诗超张银龙曹铭昌刘威乔姝凡朱晓泾罗康宁南京林业大学生态与环境学院南方现代林业协同创新中心江苏南京210037 生态环境部南京环境科学研究所江苏南京210042

【目的】探究成都市鸟类群落结构及空间分布格局特征,分析不同生境和季节的鸟类组成差异,识别鸟类热点区域,为成都市及相似区域的鸟类多样性保护提供依据。【方法】2020年,采用样线法和样点法对成都市20个行政区开展不同季节的鸟类多样... 详细信息

【目的】探究成都市鸟类群落结构及空间分布格局特征,分析不同生境和季节的鸟类组成差异,识别鸟类热点区域,为成都市及相似区域的鸟类多样性保护提供依据。【方法】2020年,采用样线法和样点法对成都市20个行政区开展不同季节的鸟类多样性调查,通过计算物种丰富度、Shannon-Wiener多样性指数、Simpson指数、Pielou均匀度指数以及群落相似性系数对成都市鸟类进行多样性分析,选取41种重点鸟类并按照生态习性将其分为猛禽、陆禽、游禽、涉禽4类,应用MaxEnt模型进行成都市重点鸟类潜在生境预测,识别成都市鸟类多样性热点区域。【结果】共调查到鸟类17目62科261种,包括国家一级重点保护鸟类1种,国家二级重点保护鸟类29种。其中留鸟99种,夏候鸟61种,冬候鸟60种,旅鸟41种。在不同季节间鸟类物种数和个体数、Shannon-Wiener多样性指数、Simpson指数和Pielou均匀度指数皆表现为冬季>春季>秋季>夏季。6种生境中,森林(200种)和湿地(169种)鸟类物种数较多,城镇用地和湿地的鸟类个体数和种群规模较大,森林生境中鸟类Shannon-Wiener多样性指数、Simpson指数最高,城镇用地中鸟类均匀度指数最高。MaxEnt模型预测结果显示,猛禽分布受土地覆被类型、距湖泊距离、距森林距离影响较大,陆禽分布受距森林距离、海拔、居民点密度影响较大,游禽、涉禽等水鸟分布则受土地覆被类型、距湖泊距离等影响较大。成都市鸟类多样性热点区域主要分布在自然保护区、西部龙门山脉,西南部朝阳湖,东部龙泉山森林公园,南部三岔湖、兴隆湖、青龙湖湿地公园及岷江、沱江河流等区域。【结论】成都市丰富的鸟类多样性与其自然环境密切相关,其中森林面积较大、空间异质性高且食物来源丰富,是鸟类重要的栖息地;湿地面积虽占比较小(仅约占全市总面积的2%),但鸟类丰富度仅次于森林,在今后鸟类生物多样性保护中同样应重点关注。

关键词：鸟类多样性群落结构空间分布 MaxEnt模型潜在生境分布热点区域成都市

A Selective‑Response Hypersensitive Bio‑Inspired Strain Sensor Enabled by Hysteresis Effect and Parallel Through‑Slits Structures

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Nano-Micro Letters 2024年第2期16卷 139-153页

作者： Qun Wang Zhongwen Yao Changchao Zhang Honglie Song Hanliang Ding Bo Li shichao Niu Xinguan Huang Chuanhai Chen Zhiwu Han Luquan ren Key Laboratory of Bionic Engineering(Ministry of Education) Jilin UniversityChangchunJilin 130022People’s Republic of China Liaoning Academy of Materials LiaoningShenyang 110167People’s Republic of China Key Laboratory of CNC Equipment Reliability(Ministry of Education) Jilin UniversityChangchunJilin 130022People’s Republic of China

Flexible strain sensors are promising in sensing minuscule mechanical signals,and thereby widely used in various advanced ***,the effective integration of hypersensitivity and highly selective response into one flexible strain sensor remains a huge ***,inspired by the hysteresis strategy of the scorpion slit receptor,a bio-inspired flexible strain sensor(BFSS)with parallel through-slit arrays is designed and ***,BFSS consists of conductive monolayer graphene and viscoelastic styrene–isoprene–styrene block *** the synergistic effect of the bio-inspired slit structures and flexible viscoelastic materials,BFSS can achieve both hypersensitivity and highly selective frequency ***,the BFSS exhibits a high gage factor of 657.36,and a precise identification of vibration frequencies at a resolution of 0.2 Hz through undergoing different morphological changes to high-frequency vibration and low-frequency ***,the BFSS possesses a wide frequency detection range(103 Hz)and stable durability(1000 cycles).It can sense and recognize vibration signals with different characteristics,including the frequency,amplitude,and *** work,which turns the hysteresis effect into a"treasure,"can provide new design ideas for sensors for potential applications including human–computer interaction and health monitoring of mechanical equipment.

关键词： Bio-inspired strain sensors Hysteresis effect Hypersensitivity Selective frequency response Health monitoring applications

Fault-sand combination modes and hydrocarbon accumulation in Binhai fault nose of Qikou Sag, Bohai Bay Basin, East China

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Petroleum Exploration and Development 2019年第5期46卷 919-934页

作者： ZHOU Lihong HAN Guomeng DONG Yueqi SHI Qianru MA Jianying HU Jinnan ren shichao ZHOU Kejia WANG Jincheng SI Weiliu Dagang Oilfield Company PetroChinaTianjin 300280China

Based on seismic and logging data,taking the downthrow fault nose of Binhai fault in Qikou Sag as the object of study,we analyzed fault characteristics,sand body distribution,fault-sand combinations and hydrocarbon accumulation to reveal the hydrocarbon enrichment law in the fault-rich area of fault depression lake *** results show that the Binhai Cenozoic fault nose is characterized by east-west zoning,the main part of the western fault segment is simple in structure,whereas the broom-shaped faults in the eastern segment are complex in structure,including several groups of *** difference of fault evolution controls the spatial distribution of sand *** sand bodies are in continuous large pieces in the downthrow fault trough belt along the Gangdong Fault in the middle segment of the fault nose,forming consequent fault-sand combination;whereas the fault activity period of the eastern part of the fault nose was later,and the sand bodies controlled by paleogeomorphology are distributed in multi-phase north-south finger-shaped pattern,forming vertical fault-sand combination pattern matching with the *** configuration between faults and sand bodies,and oil sources and caprocks determine the vertical conductivity,plane distribution and vertical distribution of oil and *** oil and gas accumulation modes,*** main fault hydrocarbon supply-fault sand consequent matching-oil accumulation in multi-layers stereoscopically and fault system transportation-fault sand vertical matching-oil accumulation in banded overlapping layers occur in the middle and eastern segments of the fault nose respectively,and they control the difference of oil and gas distribution and enrichment degree in the Binhai fault nose.

关键词： Bohai Bay Basin Qikou Sag Binhai fault nose sandstone development mechanism fault-sand combination oil and gas accumulation reservoir control mechanism

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A FAS approach for stabilization of generalized chained forms: part 1. Discontinuous control laws

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Science China(Information Sciences) 2024年第2期67卷 118-143页

作者： Guang-ren DUAN Center for Control Theory and Guidance Technology Harbin Institute of Technology Center for Control Science and Technology Southern University of Science and Technology

In this paper, a type of general nonholonomic systems is proposed, which contains both the Brockett’s two example systems, and their extended n-dimensional chained forms, as special cases. For the stabilization of such systems, a stabilizing controller is proposed based on the fully actuated system(FAS)approach, which is discontinuous at the origin but time-invariant when the open-loop system is time-invariant,and drives the feasible trajectories of the system to the origin exponentially. Furthermore, the proposed FAS approach is also extended to the sub-normal system case and the time-delay system case.

关键词： nonholonomic systems feedback stabilization exponential convergence sub-fully actuated systems time-delay systems

A FAS approach for stabilization of generalized chained forms: part 2. Continuous control laws

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Science China(Information Sciences) 2024年第3期67卷 114-135页

作者： Guang-ren DUAN Center for Control Theory and Guidance Technology Harbin Institute of Technology Shenzhen Key Laboratory of Control Theory and Intelligent Systems Southern University of Science and Technology

In this paper, continuous time-varying stabilizing controllers for the type of general nonholonomic systems proposed and treated in part 1 are designed using the fully actuated system(FAS) approach. The key step is to differentiate the first scalar equation, and by control of the obtained second-order scalar system, a proportional plus integral feedback form for the first control variable is obtained. With the solution to this designed second-order scalar system, the rest equations in the nonholonomic system form an independent time-varying subsystem which is then handled by the FAS approach. The overall designed controller contains an almost arbitrarily chosen design parameter, and is proven to guarantee the uniformly and globally exponential stability of the closed-loop system. The proposed approach is simple and effective,and is demonstrated with a practical example of ship control.

关键词： nonholonomic systems feedback stabilization fully actuated systems Lyapunov stability continuous controllers