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Chinese Medical Journal 2023年第23期136卷 2877-2879页

作者： Liang Zhang Cong Ma Hongchao Li Tao Bian Siliang Man yixin zhou Department of Orthopedics Beijing Jishuitan HospitalBeijing 100035China Department of Rheumatology and Immunology Beijing Hospital of Traditional Chinese MedicineCapital Medical UniversityBeijing 100010China Department of Rheumatology Beijing Jishuitan HospitalBeijing 100035China

To the Editor:Introduction of conventional synthetic disease-modifying antirheumatic drugs(csDMARDs)has been highly efficacious in reducing the signs and symptoms of rheumatoid arthritis(RA)and in delaying or preventing structural joint damage.Furthermore,the development and clinical use of biological DMARDs(bDMARDs)and targeted synthetic DMARDs(tsDMARDs)have dramatically altered the prognosis of patients with RA,particularly when they are combined with a treat-to-target regimen(T2T).[1]Consequently,over the last two decades,the rates of total hip arthroplasty(THA)and total knee arthroplasty(TKA)remained stable or even decreased in these special patient populations.Nevertheless,compared to patients with osteoarthritis,patients with RA have a higher risk of having worse functional outcomes and higher rates of complications after arthroplasty.This may be attributed to the complexity of the rheumatic disease process,including high disease activity,comorbidities,and immunosuppressive medications.[2]A key to making perioperative medication management decisions is to balance the risk of periprosthetic infection with the risk of a disease flare.

关键词： arthroplasty patients knee

Protrusio acetabuli in ankylosing spondylitis patients with end-stage hip involvement

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Chinese Medical Journal 2022年第10期135卷 1249-1251页

作者： Hongchao Li Liang Zhang Siliang Man Tao Bian Mingxue Chen Hui Song yixin zhou Department of Rheumatology Beijing Jishuitan HospitalBeijing 100035China Department of Adult Joint Reconstructive Surgery Beijing Jishuitan HospitalFourth Clinical College of Peking UniversityJishuitan Orthopaedic College of Tsinghua UniversityBeijing 100035China

Protrusio acetabuli(PA)is_a complication of a wide spectrum_of pathological disorders involving the hip joint,[1] The underlying.causes can be infammatory[2,3] traumatic,genetic,metabolic,infectious,and idiopathic.Inflammatory causes lead todestruction and weakening of the bone surrounding the hip with resultant migration along the joint-reaction vector.

关键词： involvement patients traumatic

Harvesting biomechanical energy in the walking by shoe based on liquid metal magnetohydrodynamics

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Frontiers in Energy 2012年第2期6卷 112-121页

作者： Dan DAI Jing LIU yixin zhou Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBejing 100190China Department of Biomedical Engineering School of MedicineTsinghua UniversityBeijing 100084China

A liquid metal magnetohydrodynamics generation system （LMMGS） was proposed and demonstrated in this paper for collecting parasitic power in shoe while walking. Unlike the conventional shoe-mounted human power harvesters that use solid coil and gear mechanism, the proposed system employs liquid metal （Ga62In25Sn13） as energy carrier, where no moving part is requested in magnetohydrodynamics generators （MHGs）. While walk- ing with the LMMGS, the foot alternately presses the two liquid metal pumps （LMPs） which are respectively placed in the front and rear of the sole. As a result, the liquid metal in the LMPs （LMP I and II） is extruded and flows through the MHGs （MHG I and II） in which electricity is produced. For a comparison, three types ofLMMGSs （LMMGS A, B and C） were built where all the parts are the same except for the LMPs. Furthermore, performances of these LMMGSs with different volume of injected liquid metal were tested respectively. Experimental results reveal that both the output voltage and power of the LMMGS increase with the volume of injected liquid metal and the size of the LMPs. In addition, a maximum output power of 80 mW is obtained by the LMMGS C with an efficiency of approximately 1.3%. Given its advantages of no side effect, light weight, small size and reliability, The LMMGS is well-suited for powering the wearable and implantable micro/nano device, such as wearable sensors, drug pumps and so on.

关键词： human energy harvesting liquid metal wear-able magnetohydrodynamics generator parasitic power inshoe

Self-powered macroscopic Brownian motion of spontaneously running liquid metal motors

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Science Bulletin 2015年第13期60卷 1203-1210页

作者： Bin Yuan Sicong Tan yixin zhou Jing Liu Key Laboratory of Cryogenics Technical Institute of Physics and Chemistry Chinese Academy of Sciences Department of Biomedical Engineering School of MedicineTsinghua University

We disclosed the interiorly driven macroscopic Brownian motion behavior of self-powered liquid metal motors. Such tiny motors in millimeter scale move randomly at a velocity magnitude of centimeters per second in aqueous alkaline solution, well resembling the classical Brownian motion. However, unlike the existing phenomena, where the particle motions were caused by collisions from the surrounding molecules, the current random liquid metal motions are internally enabled and self-powered,along with the colliding among neighboring motors, the substrate and the surrounding electrolyte molecules.Through uniformly dissolving only 1 %(mass percentage)Al into Ga In10, many tiny motors can be quickly fabricated and activated to take the Brownian-like random motions. Further, we introduced an experimental approach of using optical image contrast, which works just like the Wilson cloud chamber, to distinctively indicate the motor trajectory resulted from the generated hydrogen gas stream.A series of unusual complicated multi-phase fluid mechanics phenomena were observed. It was also identified that the main driving factor of the motors comes fromthe H2 bubbles generated at the bottom of these tiny motors, which is different from the large size self-fueled liquid metal machine. Several typical mechanisms for such unconventional Brownian-like motion phenomena were preliminarily interpreted.

关键词：布朗运动自驱动马达液态金属宏观运行随机移动液体金属

Wearable thermal energy harvester powered by human foot

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Frontiers in Energy 2013年第1期7卷 26-38页

作者： Guodong XU Yang YANG yixin zhou Jing LIU Key Laboratory of Cryogenics and Beijing Key Laboratory of Cryo- Biomedical Engineering Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China Key Laboratory of Cryogenics and Beijing Key Laboratory of Cryo-Biomedical Engineering Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China Department of Biomedical Engineering School of Medicine Tsinghua University Beijing 100084 China

With explosive applications of many advanced mobile electronic devices, a pervasive energy system with long term sustainability becomes increasingly important. Among the many efforts ever tried, human power is rather unique due to its independence of weather or geographical conditions and is therefore becoming a research focus. This paper is dedicated to demonstrate the possibility and feasibility of harvesting thermal energy from human body by sandwiching a thermoelectric generator （TEG） between human shoe bottom and ground, aiming to power a portable electronic device. Through the conceptual experiments conducted on adults, a maximum 3.99 mW steady state power output at a ground temperature with 273 K is obtained, which is sufficient enough to drive a lot of micro-electronic devices. Also, parametric simulations are performed to systematically clarify the factors influencing the TEG working performance. To further reveal the mechanism of this power generation modality, analytical solutions to the coupled temperature distributions for human foot and TEG module are obtained and the correlation between TEG characteristics and the output power are studied. It was demonstrated that, the TEG working as a wearable power resource by utilizing thermal energy of human foot shows enormous potential and practical values either under normal or extreme conditions.

关键词： human power thermal energy energy harvesting micro power wearable device

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基于图神经网络和多主体评价的教学资源推荐

计算机工程 2024年第7期50卷 13-22页

作者：何杏宇周易歆罗东旭杨桂松上海理工大学光电信息与计算机工程学院上海200093 上海理工大学出版印刷与艺术设计学院上海200093

在现有的教学资源推荐系统中算法和模型不断进步,但推荐策略仍然停留在学生偏好分析或内容相关性计算两方面,忽略了教学资源推荐中授课教师对教学目标的掌控以及企业导师的实践价值引导作用。为此,提出一种基于图神经网络和多主体评价... 详细信息

在现有的教学资源推荐系统中算法和模型不断进步,但推荐策略仍然停留在学生偏好分析或内容相关性计算两方面,忽略了教学资源推荐中授课教师对教学目标的掌控以及企业导师的实践价值引导作用。为此,提出一种基于图神经网络和多主体评价的教学资源推荐方法,综合考虑学生、教师和企业导师3个主体的评价,并解决多主体评价导致的小样本问题。首先,构建包含教学资源和知识点的异质图,通过异质图嵌入分别获取教学资源和知识点的特征向量表征,计算教学资源与知识点的相关性;然后,设计多主体评价机制,分别制定针对学生、教师和企业导师3个不同主体的细粒度评价指标,利用基于图神经网络的小样本学习(GNN-FSL)模型获取不同主体对教学资源的评分向量估计;最后,利用注意力机制来综合不同主体的评分向量估计以及教学资源与知识点的相关性对推荐结果的影响。实验结果表明,该方法在小样本训练中具有较好的评分向量估计准确度优势,并且融合多个主体评价和增加细粒度多主体评价指标的两大措施均对提升推荐准确度和学习成绩具有显著作用。

关键词：教学资源推荐图神经网络评价多主体小样本

川中侏罗系自流井组大安寨段页岩油储层特征及其勘探启示

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石油实验地质 2024年第1期46卷 11-21页

作者：洪海涛路俊刚秦春雨张少敏张芮周易鑫肖正录周红飞韩璐媛中国石油西南油气田分公司勘探开发研究院成都610051 西南石油大学油气地质及开发工程全国重点实验室成都610500 西南石油大学天然气地质四川省重点实验室成都610500 西南石油大学地球科学与技术学院成都610500

为进一步指导四川盆地侏罗系自流井组大安寨段页岩油的勘探与开发,亟需理清页岩油的有利赋存岩相。通过岩心观察、薄片鉴定、高压压汞、核磁共振、岩石热解等实验,分析大安寨段页岩层系不同岩相的储集空间类型、孔隙结构特征及含油性。... 详细信息

为进一步指导四川盆地侏罗系自流井组大安寨段页岩油的勘探与开发,亟需理清页岩油的有利赋存岩相。通过岩心观察、薄片鉴定、高压压汞、核磁共振、岩石热解等实验,分析大安寨段页岩层系不同岩相的储集空间类型、孔隙结构特征及含油性。结果表明,大安寨段主要发育块状(泥质)介壳灰岩、层状泥质介壳灰岩、层状介壳页岩、纹层状含介壳页岩、块状含介壳黏土质页岩和页理状含粉砂黏土质页岩6类岩相;页岩物性远优于介壳灰岩,且随着灰质含量的增加孔径逐渐增大,但总孔体积和总连通体积逐渐减小;大安寨段页岩层系平均游离油(S1)值为1.31 mg/g,含油性中等,页理状含粉砂黏土质页岩与纹层状含介壳页岩S1值较高,分别为2.37 mg/g与1.82 mg/g。页理状含粉砂黏土质页岩和纹层状含介壳页岩的储集性较好、含油性较高,两者构成的岩相组合可作为大安寨段页岩油的重点勘探对象。

关键词：储集空间含油性页岩油储层特征大安寨段侏罗系四川盆地

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PLC控制系统技术应用探讨

中国仪器仪表 2024年第1期 73-76页

作者：姜涛周毅昕曹洪瑞吉林石化公司仓储中心吉林吉林132021 吉林石化公司电仪中心(检测中心) 吉林吉林132022

本文介绍了PLC控制系统的发展历程和趋势,细致论述了PLC控制系统技术特点,分析了PLC控制系统应用领域及系统构成和应用软件,并提出了PLC控制系统的发展前景。

关键词： PLC控制系统梯形图人机界面

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天然气转化制氢工艺技术研究

中国仪器仪表 2024年第5期 90-92,96页

作者：刘旭赵雨桐周毅昕吉林市吉神化学工业股份有限公司吉林吉林132021 吉林石化分公司染料厂吉林吉林132021 吉林石化公司电仪中心(检测中心) 吉林吉林132022

本文针对天然气转化制氢技术的工艺流程进行论述,介绍了天然气转化制氢技术的工艺、设备、仪表及自控软件特殊性设计,并对实施效果进行评价,实现了低投入、高回报的经济效果。

关键词：天然气制氢仪表自控系统变压吸附

膝骨关节炎患者居家康复训练后膝关节屈伸肌力的变化

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中华骨与关节外科杂志 2024年第2期17卷 137-142页

作者：钟珊陶莉裴倩韩梦琪周一新顾建明首都医科大学附属北京积水潭医院康复医学科北京102208 首都医科大学附属北京积水潭医院矫形骨科北京102208

目的:评估膝骨关节炎患者居家康复训练后膝关节屈伸肌力的变化。方法:前瞻性纳入2020年5月至2021年10月收治的50例单侧膝骨关节炎患者,均接受3个月居家康复训练(包括健康指导和功能训练)。居家康复训练前、训练3个月后应用Biodex等速测... 详细信息

目的:评估膝骨关节炎患者居家康复训练后膝关节屈伸肌力的变化。方法:前瞻性纳入2020年5月至2021年10月收治的50例单侧膝骨关节炎患者,均接受3个月居家康复训练(包括健康指导和功能训练)。居家康复训练前、训练3个月后应用Biodex等速测试系统分别在慢速60°/s等速、中速120°/s等速和90°等长模式下对患者进行双膝屈伸肌力测试,记录峰力矩,同时记录疼痛视觉模拟评分(VAS)及西安大略省和麦克马斯特大学骨关节炎指数(WOMAC)评分,并进行比较。结果:训练前,患者患侧60°/s等速、120°/s等速、90°等长屈膝、伸膝肌力均弱于健侧(P均0.05)。训练3个月后,患者疼痛VAS评分、WOMAC评分均较训练前改善(P均<0.01)。结论:膝骨关节炎患者居家康复训练3个月后膝关节屈伸肌力明显增强,患侧与健侧屈膝肌力无明显差异,而伸膝肌力尚有差异,同时患者疼痛及膝关节功能明显改善。

关键词：膝关节骨关节炎屈膝肌力伸膝肌力居家康复训练