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杨氏牵引旋后法手法复位小夹板外固定治疗Galeazzi骨折

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中医正骨 2024年第5期36卷 72-75,80页

作者：李巍曹谦成勇峰张琼湘潭市中医医院湖南湘潭411100

目的:观察杨氏牵引旋后法手法复位小夹板外固定治疗Galeazzi骨折的临床疗效和安全性。方法:2017年1月至2022年12月,门诊治疗Galeazzi骨折患者68例。男35例,女33例;左侧23例,右侧45例;年龄5~75岁,中位数35岁;新鲜骨折52例,陈旧性骨折16... 详细信息

目的:观察杨氏牵引旋后法手法复位小夹板外固定治疗Galeazzi骨折的临床疗效和安全性。方法:2017年1月至2022年12月,门诊治疗Galeazzi骨折患者68例。男35例,女33例;左侧23例,右侧45例;年龄5~75岁,中位数35岁;新鲜骨折52例,陈旧性骨折16例。采用杨氏牵引旋后法通过牵引和前臂旋后手法复位下尺桡关节脱位和桡骨骨折,复位后用小夹板外固定。记录骨折愈合时间,观察并发症发生情况。分别于治疗前、复位固定后7 d及末次随访时,采用疼痛视觉模拟量表(visual analogue scale,VAS)评分评价患肢疼痛情况;于末次随访时,采用Anderson成人前臂骨折治疗效果评价分级标准评价前臂功能,采用Cooney腕关节评分评价腕关节功能。结果:68例患者均顺利完成治疗;均获随访,随访时间3~12个月,中位数7个月;骨折均愈合,愈合时间8~12周,中位数9周。患肢疼痛VAS评分,治疗前(7.8±1.2)分,复位固定后7 d(3.5±1.3)分,末次随访时(1.3±0.4)分。末次随访时,前臂旋前80.3°±4.5°、旋后83.5°±5.3°;前臂功能Anderson评级,优56例、良11例、可1例;Cooney腕关节评分(93.6±3.4)分,优59例、良9例。并发皮肤压疮2例,经对症治疗后皮肤愈合;均未出现缺血性肌挛缩等并发症。结论:杨氏牵引旋后法手法复位小夹板外固定治疗Galeazzi骨折,可有效缓解患肢疼痛,有利于骨折愈合和前臂及腕关节功能的恢复,且并发症少。

关键词：桡骨骨折关节脱位正骨手法小夹板固定术

Strong and Superhydrophobic Wood with Aligned Cellulose Nanofibers as a Waterproof Structural Material

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Chinese Journal of Chemistry 2020年第8期38卷 823-829页

作者： yongfeng li Chaoji Chen Jianwei Song Chunpeng Yang Yudi Kuang Azhar Vellore Emily Hitz Mingwei Zhu Feng Jiang Yonggang Yao Amy Gong Ashlie Martini liangbing Hu Department of Materials Science and Engineering University of MarylandCollege ParkMaryland20742USA Mechanical Engineering University of CaliforniaMercedCalifornia95343USA

lightweight structural materials are important for the energy efficiency of applications,particularly those in the building sector.Here,inspired by nature,we developed a strong,superhydrophobic,yet lightweight material by simple in situ growth of nano-SiO2 and subsequent densification of the wood substrate.In situ generation of SiO2 nanoparticles both inside the wood channels and on the wood surfaces gives the material superhydrophobicity,with static and dynamic contact angles of 159.4°and 3°,respectively.Densification of the wood to remove most of the spaces among the lumen and cell walls results in a laminated,dense structure,with aligned cellulose nanofibers,which in turn contributes to a high mechanical strength up to 384.2 MPa(7-times higher than natural wood).Such treatment enables the strong and superhydrophobic wood(SH-Wood)to be stable and have excellent water,acid,and alkaline resistance.The high mechanical strength of SH-Wood combined with its excellent structural stability in harsh environments,as well its low density,positions the strong and superhydrophobic wood as a promising candidate for strong,lightweight,and durable structural materials that could potentially replace steel.

关键词： fibers proof structural

双主相混合稀土基RE-Fe-B磁体的磁性能和抗腐蚀性改进

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稀有金属材料与工程 2024年第3期53卷 660-666页

作者：连昕丽周建军李仕林赵院红王长鹏王印刘飞章明左建华白锁刘艳丽李柱柏李永峰内蒙古科技大学理学院内蒙古包头014010 内蒙古科技大学材料与冶金学院内蒙古包头014010 中科院赣江创新研究院江西赣州341000

为了实现稀土资源的平衡应用且降低RE-Fe-B稀土永磁材料的价格,针对混合稀土基永磁材料进行研究,分别采用单、双主相工艺制备了名义成分[(Pr,Nd)_(1-x)MM_(x)]30.3(Fe,Co)balM_(0.73)B_(0.98)(x=0.3,0.5和0.7,质量分数)的磁体,对比研究... 详细信息

为了实现稀土资源的平衡应用且降低RE-Fe-B稀土永磁材料的价格,针对混合稀土基永磁材料进行研究,分别采用单、双主相工艺制备了名义成分[(Pr,Nd)_(1-x)MM_(x)]30.3(Fe,Co)balM_(0.73)B_(0.98)(x=0.3,0.5和0.7,质量分数)的磁体,对比研究其磁性能和抗腐蚀性。研究发现:双主相工艺制备的磁体相比单主相工艺制备的同成分磁体展现了优越的磁性能和抗腐蚀性。当x=0.5,双主相磁体的磁性能为B_(r)=1.308 T,H_(cj)=799.98 kA/m和(BH)_(max)=325.6436 kJ/m^(3),远高于同成分的单主相磁体的性能(B_(r)=1.297 T,H_(cj)=746.8868 kA/m和(BH)_(max)=317.8428 kJ/m^(3))。这种改进源于富稀土相分布的改进以及主相晶粒间和晶粒内部耦合作用的增强。当双主相磁体暴露在湿热环境下时,磁体中不仅存在富稀土相腐蚀,也存在主相晶粒的腐蚀成粉现象,这主要是由于富稀土相与水蒸气和氧气反应时产生氢气,导致主相晶粒被氢化,由于主相晶粒间和晶粒内部的镧铈分布差异,产生大的应力,导致其表现出区别于单主相磁体的腐蚀行为。

关键词：混合稀土双主相工艺磁性能抗腐蚀性稀土的非均匀分布

发酵牡丹籽粕对黄山黑鸡生产性能、蛋品质、蛋黄中脂肪酸含量及血清生化指标的影响

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动物营养学报 2024年第2期36卷 874-884页

作者：刘伟陈相名马瑞钰朱涌峰戚仁荣李俊营万意李岩舒翔詹凯安徽省农业科学院畜牧兽医研究所畜禽产品安全工程安徽省重点实验室合肥230031 安徽农业大学生命科学学院合肥230036 安徽黟品黄山黑鸡保种有限公司黟县245500

本试验旨在研究发酵牡丹籽粕对黄山黑鸡生产性能、蛋品质、蛋黄中脂肪酸含量及血清生化指标的影响。选取240日龄产蛋率及体重相近的黄山黑鸡864只,随机分为3组,每组4个重复,每个重复72只。对照组饲喂基础饲粮,试验组分别饲喂在基础饲粮... 详细信息

本试验旨在研究发酵牡丹籽粕对黄山黑鸡生产性能、蛋品质、蛋黄中脂肪酸含量及血清生化指标的影响。选取240日龄产蛋率及体重相近的黄山黑鸡864只,随机分为3组,每组4个重复,每个重复72只。对照组饲喂基础饲粮,试验组分别饲喂在基础饲粮中添加5%(5%FPSM组)和9%发酵牡丹籽粕(9%FPSM组)的试验饲粮。预试期1周,正试期8周。结果表明:1)与对照组相比,5%FPSM组的产蛋率显著升高(P<0.05),料蛋比和平均日采食量显著降低(P<0.05);9%FPSM组的产蛋率和平均日采食量极显著降低(P<0.01)。2)与对照组相比,9%FPSM组的蛋形指数显著升高(P<0.05),蛋壳颜色显著降低(P<0.05)。3)与对照组相比,5%FPSM组的蛋黄中ω-3多不饱和脂肪酸(PUFA)含量显著升高(P<0.05);9%FPSM组的蛋黄中总饱和脂肪酸(SFA)含量和ω-6/ω-3 PUFA显著或极显著降低(P<0.05或P<0.01),总PUFA和ω-3 PUFA含量显著或极显著升高(P<0.05或P<0.01)。4)与对照组相比,5%FPSM组的血清甘油三酯(TG)、免疫球蛋白A(IgA)、免疫球蛋白G(IgG)含量和碱性磷酸酶(ALP)活性及总抗氧化力(T-AOC)极显著升高(P<0.01),血清超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)活性和免疫球蛋白M(IgM)含量极显著降低(P<0.01);9%FPSM组的血清低密度脂蛋白(LDL)、TG、尿素氮(UN)、IgA、IgM含量和ALP活性及T-AOC显著或极显著升高(P<0.05或P<0.01),血清高密度脂蛋白(HDL)和丙二醛(DMA)含量极显著降低(P<0.01)。由此可见,饲粮中添加5%的发酵牡丹籽粕可提高黄山黑鸡的生产性能;添加5%和9%的发酵牡丹籽粕可提高黄山黑鸡的蛋黄中ω-3 PUFA含量,提高机体抗氧化能力和免疫力。本试验条件下,黄山黑鸡饲粮中发酵牡丹籽粕的适宜添加比例为5%。

关键词：发酵牡丹籽粕黄山黑鸡生产性能蛋品质脂肪酸血清生化指标

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绿色低碳概念在卷烟包装材料中的应用

包装工程 2024年第5期45卷 109-117页

作者：李雪张建栋廖宇张恒伟窦海成马永峰甘肃烟草工业有限责任公司技术研发中心兰州730050 湖北中烟工业有限责任公司技术中心武汉430030

目的绿色低碳卷烟材料的应用是助力烟草工业企业向节能减碳型企业转型的重要途径,也是向消费者传达绿色低碳概念的“纽带”。方法介绍烟草工业企业在降重减碳、降解材料减排、循环减排、印刷工艺减排以及智能化绿色设计减排5个方面的应... 详细信息

目的绿色低碳卷烟材料的应用是助力烟草工业企业向节能减碳型企业转型的重要途径,也是向消费者传达绿色低碳概念的“纽带”。方法介绍烟草工业企业在降重减碳、降解材料减排、循环减排、印刷工艺减排以及智能化绿色设计减排5个方面的应用。结果用减重、材料替换和V槽工艺减少生物基碳使用,利用丰富的可降解资源减少木材使用,用环保材料替代不可降解材料,让烟箱和香烟固弃物循环再利用,优化纸张效果替代印刷工序和油墨,通过数字化平台打造让设计高效、碳足迹可视、绿色低碳概念,从设计源头到产品输出渗透到卷烟包装材料中的各个环节。结论未来,还需聚焦于纸基功能材料和其他行业在“双碳”目标中的新举措,纳米纤维素、木质纤维素、非木材纤维和可食性材料的开发与应用,碳交易、碳信用、碳捕捉材料等应用,以及不断在科技创新和基础研究中融入AI概念,不断解放科研人员去做创意性工作,提升创新效率。

关键词：绿色低碳卷烟包装材料

Shape memory alloy-based 3D morphologically reconfigurable chiral metamaterial for tailoring circular dichroism by voltage control

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Photonics Research 2023年第3期11卷 373-382页

作者： liXIN JIANG QI YUAN HAO YANG yongfeng li liN ZHENG ZHIBIAO ZHU SHUANG liANG YONGQIANG PANG HE WANG JIAFU WANG SHAOBO QU Shaanxi Key Laboratory of Artificially-Structured Functional Materials and Devices Airforce Engineering UniversityXi'an 710051China Electronic Materials Research Laboratory Key Laboratory of the Ministry of EducationXi'an Jiaotong UniversityXi'an 710049China

Three-dimensional chiral materials with intrinsic chirality play a crucial role in achieving a strong chiral response and flexible light manipulation.Reconfigurable chirality through the 3D morphological transformation of chiral materials is significant for greater freedom in tailoring light but remains a challenge.Inspired by the unique 3D morphological memory capability of shape memory alloys(SMAs),we demonstrate and discuss a chiral resonator in the microwave regime that can realize reconfigurable chirality through 3D morphological transformation.The introduction of heating film realizes voltage control of SMA’s morphology for utilizing the temperature sensitivity of SMA better,enabling arbitrary control of circular dichroism(CD)flip and CD intensity.The qualitative and quantitative analysis of the surface current distribution of chiral enantiomers reveals that the chirality of metaatoms originates from the surge of electric dipole pxand electric quadrupole Q.It is worth mentioning that the proposed strategy to achieve reconfigurable chirality using 3D morphological transformations can be directly extended to other higher frequencies,such as visible,infrared,and terahertz bands.Significantly,our paradigm to study the relationship between complex 3D morphology and chirality holds potential for application in biosensing,spin detection,and spin-selective devices.

关键词： chiral circular holds

Virtual metasurfaces:reshaping electromagnetic waves in distance

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Photonics Research 2023年第2期11卷 203-211页

作者： RUICHAO ZHU JIAFU WANG YAJUAN HAN YUXIANG JIA TONGHAO liU TIANSHUO QIU SAI SUI yongfeng li MINGBAO YAN SHAOBO QU CHENG-WEI QIU Shaanxi Key Laboratory of Artificially-Structured Functional Materials and Devices Air Force Engineering UniversityXi’an 710051China Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore NUS Suzhou Research Institute(NUSRI) Suzhou 215000China

Metasurface has provided unprecedented freedoms in manipulating electromagnetic(EM) waves, exhibiting fascinating functions. Conventionally, these functions are implemented right on metasurfaces, where spatial modulations on EM wave amplitudes or phases are achieved by meta-atoms. This study proposes the concept of virtual metasurface(VM), which is formed by arrays of foci away from the entity metasurface. Unlike conventional metasurfaces, spatial modulations on the amplitudes or phases of EM waves occur in the air, with a focal length distance from the entity metasurface. As a proof of concept, we demonstrated a transmissive VM. The entity metasurface consists of transmissive focusing metasurface tiles(TFMTs) with the same focal length. Two TFMTs were designed with phase difference π to enable the most typical checkerboard configuration. The TFMTs were assembled to form the entity metasurface, whereas their foci formed the VM. Due to the π phase difference among adjacent foci, EM propagation along the normal direction was cancelled, leading to four tilted far-field beams. The concept of VM can be readily extended to higher frequencies from terahertz to optical regimes and may find wide applications in communication, camouflage, and other fields.

关键词： surface. surfaces proof

Blockchain-Based Privacy-Preserving Public Auditing for Group Shared Data

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Intelligent Automation & Soft Computing 2023年第3期35卷 2603-2618页

作者： Yining Qi Yubo Luo yongfeng Huang Xing li Tsinghua University Beijing100084China Beijing National Research Center for Information Science and Technology Beijing100084China University of North Carolina at Chapel Hill North Carolina27599USA

Cloud storage has been widely used to team work or cooperation devel-opment.Data owners set up groups,generating and uploading their data to cloud storage,while other users in the groups download and make use of it,which is called group data sharing.As all kinds of cloud service,data group sharing also suffers from hardware/software failures and human errors.Provable Data Posses-sion(PDP)schemes are proposed to check the integrity of data stored in cloud without downloading.However,there are still some unmet needs lying in auditing group shared data.Researchers propose four issues necessary for a secure group shared data auditing:public veriﬁcation,identity privacy,collusion attack resis-tance and traceability.However,none of the published work has succeeded in achieving all of these properties so far.In this paper,we propose a novel block-chain-based ring signature PDP scheme for group shared data,with an instance deployed on a cloud server.We design a linkable ring signature method called linkable Homomorphic Authenticable Ring Signature(LHARS)to implement public anonymous auditing for group data.We also build smart contracts to resist collusion attack in group auditing.The security analysis and performance evalua-tion prove that our scheme is both secure and efﬁcient.

关键词： Provable data possession data integrity blockchain ring signature

非线性最小二乘法在傅里叶变换红外光谱定量分析中的误差估计

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光子学报 2024年第4期53卷 20-31页

作者：李新春刘建国徐亮沈先春徐寒杨束胜全王钰豪金岭邓亚颂孙永丰中国科学技术大学环境科学与光电技术学院合肥230026 中国科学院合肥物质科学研究院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室合肥230031

根据统计学的参数估计理论,提出在傅里叶变换红外光谱定量分析中使用非线性最小二乘法进行浓度反演的参数误差估计方法。实验中,通过光谱平均次数来控制噪声水平,以此来评估不同噪声水平下混合气体中各组分反演结果的估计误差。结果表明... 详细信息

根据统计学的参数估计理论,提出在傅里叶变换红外光谱定量分析中使用非线性最小二乘法进行浓度反演的参数误差估计方法。实验中,通过光谱平均次数来控制噪声水平,以此来评估不同噪声水平下混合气体中各组分反演结果的估计误差。结果表明,对于自研抽取式傅里叶变换红外光谱仪,8次平均光谱即可满足反演误差小于3%的需求,64次平均光谱的反演结果配合估计误差可以实现对平均浓度的覆盖率达到100%。随着噪声水平的降低,仪器、环境等非噪声因素的扰动是估计误差的主要部分。该方法在优化光谱定量分析的参数配置和指导光谱仪器系统设计等诸多方面具有重要的应用前景。

关键词：傅里叶变换红外光谱定量分析非线性最小二乘多组分误差估计