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Repair of peripheral nerve defects by nerve transposition using small gap bio-sleeve suture with different inner diameters at both ends

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Neural Regeneration Research 2019年第4期14卷 706-712页

作者： yu-Hui Kou You-lai yu Ya-Jun Zhang Na Han Xiao-Feng Yin yu-Song yuan Fei yu Dian-Ying Zhang Pei-Xun Zhang Bao-Guo Jiang Peking University People's Hospital The Affiliated Hospital of Xuzhou Medical University

During peripheral nerve transposition repair, if the diameter difference between transposed nerves is large or multiple distal nerves must be repaired at the same time, traditional epineurial neurorrhaphy has the problem of high tension at the suture site, which may even lead to the failure of nerve suture. We investigated whether a small gap bio-sleeve suture with different inner diameters at both ends can be used to repair a 2-mm tibial nerve defect by proximal transposition of the common peroneal nerve in rats and compared the results with the repair seen after epineurial neurorrhaphy. Three months after surgery, neurological function, nerve regeneration, and recovery of nerve innervation muscle were assessed using the tibial nerve function index, neuroelectrophysiological testing, muscle biomechanics and wet weight measurement, osmic acid staining, and hematoxylin-eosin staining. There was no obvious inflammatory reaction and neuroma formation in the tibial nerve after repair by the small gap bio-sleeve suture with different inner diameters at both ends. The conduction velocity, muscle strength, wet muscle weight, cross-sectional area of muscle fibers, and the number of new myelinated nerve fibers in the biosleeve suture group were similar to those in the epineurial neurorrhaphy group. Our findings indicate that small gap bio-sleeve suture with different inner diameters at both ends can achieve surgical suture between nerves of different diameters and promote regeneration and functional recovery of injured peripheral nerves.

关键词： nerve regeneration bio-sleeve small gap sleeve suture nerve transposition nerve defect nerve conduit nerve reinnervation peripheral nerve neural regeneration

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Synthesis of 2,5-disubstituted tetrahydrofurans from organozinc halides and lactones

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Chinese Chemical Letters 2010年第5期21卷 511-514页

作者： Dan Feng Huang Hai Feng Wang Chang Ming Xu Teng Niu yu lai Hu College of Chemistry and Chemical Engineering Northwest Normal UniversityLanzhou 730070China

2,5-Disubstituted tetrahydrofurans were obtained from lactones and organozinc halides in moderate to high yield in the presence of Lewis acids.

关键词： Organozinc halides Lactones Lactols 2,5-Disubstituted tetrahydrofurans Lewis acid

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高原低氧与施工作业双约束对职业倦怠的影响研究

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工程管理学报 2024年第4期38卷 147-152页

作者：周勇马佳瑶侯兴隆李翔孙睿来雨西安建筑科技大学管理学院陕西西安710000 中铁二十局集团第四工程有限公司山东青岛266000

高原低压低氧和施工作业双重约束下,施工作业人员极易出现职业倦怠症状,严重影响身心健康及工作积极性。基于此,采用问卷调研的方法在高原地区对施工作业人员开展了职业倦怠调研,通过多元线性逐步回归分析了职业倦怠中情绪耗竭、职业效... 详细信息

高原低压低氧和施工作业双重约束下,施工作业人员极易出现职业倦怠症状,严重影响身心健康及工作积极性。基于此,采用问卷调研的方法在高原地区对施工作业人员开展了职业倦怠调研,通过多元线性逐步回归分析了职业倦怠中情绪耗竭、职业效能、去人性化3个维度的主要影响因素,采用二元logistics回归进一步分析了3个维度对职业倦怠的综合影响。结果表明:职业倦怠主要受年龄、来源地海拔、受教育程度、工龄、吸烟情况、睡眠状况影响,其中年龄与来源地海拔是影响职业倦怠最显著的因素;各影响因素在情绪耗竭、职业效能、去人性化3个维度的影响强度略有差异。

关键词：低压低氧施工作业双重约束施工作业人员职业倦怠

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台风“环高”的数值模拟及微物理结构分析

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广东气象 2024年第3期46卷 26-31页

作者：赖玉林李欣萍钟东良方杏芹东源县气象局广东东源517500 韶关市气象局广东韶关512028 河源市气象局广东河源517000 广东海洋大学海洋与气象学院广东湛江524000

以GFS分析资料作为初始场和边界场,使用WRF4.0对国际编号为2022的台风“环高”进行数值模拟,借助中国气象局热带气旋资料中心的最佳路径集、GPM卫星资料和常规地面观测资料对比NSSL和WDM6两个微物理方案在台风路径、强度、降水以及水成... 详细信息

以GFS分析资料作为初始场和边界场,使用WRF4.0对国际编号为2022的台风“环高”进行数值模拟,借助中国气象局热带气旋资料中心的最佳路径集、GPM卫星资料和常规地面观测资料对比NSSL和WDM6两个微物理方案在台风路径、强度、降水以及水成物含量上的区别。试验结果表明:(1)NSSL的台风路径和强度相对接近真实台风;(2)NSSL的降水分布相对接近卫星反演结果;(3)两个微物理方案的水成物垂直分布差异显著,NSSL的冰系粒子含量相对较多,云水雨水含量相对较少。从模拟结果来看,两个方案对冰相过程的不同处理导致台风出现不同程度的发展,反映了台风强度和降水对冰相过程的敏感性。

关键词：天气学数值模拟台风“环高” 微物理结构

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Surface decoration of mesocarbon microbeads with multifunctional TiNbO_(4-x)@C coating layer as high rate and stable anode of Li-ion batteries

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Rare Metals 2024年第5期43卷 2053-2066页

作者： Jia-Mei lai Zhi-Min Zou yu Bai yu-Tao Xing Chun-Hai Jiang Fujian Provincial Key Laboratory of Functional Materials and Applications Institute of Advanced Energy MaterialsSchool of Materials Science and EngineeringXiamen University of TechnologyXiamen 361024China Shanghai XFH Science and Technology Development Co. Ltd.Shanghai 200949China Fujian XFH New Energy Materials Co. Ltd.Yong'an 366000China Shenzhen XFH Science and Technology Co. Ltd.Shenzhen 518071China Laboratorio de Microscopia Eletronica de Alta Resolucao Centro de Caracterizagao Avangada Para a Industria de Petroleo(LaMAR/CAIPE)Universidade Federal FluminenseNiteroiRJ 24210-346Brazil

Surface modification of graphite anode with electroactive matters has been proven of a more practical strategy in enhancing the performance of Li-ion batteries than exploring alternative novel anode ***,rutile TiNbO_(4-x) nanoparticles with a tunnel structure are employed as multifunctional decoration substances in combination with a carbon coating layer to improve the rate and cycle properties of mesocarbon microbeads(MCMBs).As compared to pristine MCMB,the Li^(+)diffusion coefficients of the composite anodes are enhanced due to the synergistic effect of TiNbO_(4-x)@***,the overcharge and voltage polarization of the composite anodes at high rate are obviously minimized due to the current sharing effect of the high-potential TiNbO_(4-x).Moreover,the amorphous Li_(y)TiNbO_(4-x) converted from TiNbO_(4-x) in the initial lithiation process can deliver pseudocapacitive capacity to the composite anodes from the second *** of these functions of TiNbO_(4-x)@Ccoating layer have directly contributed to the improved rate and cycle performance of the MCMB/TiNbO_(4-x)@C composite *** one containing 12.0 wt%TiNbO_(4-x) exhibits a high reversible specific capacity of 118 m Ah·g^(-1)at 10C(1C=372 m A·g^(-1)),together with a high capacity retention of 90.9%after 300 cycles at 3C,which are all much superior to those of pristine MCMB.

关键词： Li-ion batteries MCMB TiNbO_(4-x)@C Surface decoration Rate capability

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阿尔茨海默病患者血清中人β淀粉样蛋白1-42和人磷酸化tau-181蛋白的临床检测意义

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中国现代药物应用 2024年第9期18卷 68-70页

作者：郭静赖于杨罗晨辉廖小叶卢正优龙岩市第三医院检验科 364000

目的探讨阿尔茨海默病(AD)患者血清中人β淀粉样蛋白1-42(Aβ1-42)和人磷酸化tau-181蛋白(p-tau-181)的临床检测意义。方法选取60例AD患者作为AD组,依据简易智力状态检查表(MMSE)评分不同分为轻度AD组(20例)、中度及以上AD组(40例);选... 详细信息

目的探讨阿尔茨海默病(AD)患者血清中人β淀粉样蛋白1-42(Aβ1-42)和人磷酸化tau-181蛋白(p-tau-181)的临床检测意义。方法选取60例AD患者作为AD组,依据简易智力状态检查表(MMSE)评分不同分为轻度AD组(20例)、中度及以上AD组(40例);选择同期进行体检的75例健康受试者作为健康对照组。对两组血清Aβ1-42和p-tau-181水平进行检测。比较AD组与健康对照组不同性别血清Aβ1-42和p-tau-18水平;AD组与健康对照组血清Aβ1-42和p-tau-18水平;AD组不同严重程度血清Aβ1-42和p-tau-18水平。结果健康对照组中男性受试者血清Aβ1-42和p-tau-18水平与女性比较,差异均无统计学意义(P>0.05)。AD组中男性患者血清Aβ1-42和p-tau-18水平与女性比较,差异均无统计学意义(P>0.05)。AD组血清Aβ1-42和p-tau-18水平分别为(102.0±12.3)、(22.1±6.9)pg/ml,显著高于健康对照组的(33.7±10.6)、(10.9±7.1)pg/ml,差异有统计学意义(P<0.05)。中度及以上AD组血清Aβ1-42和p-tau-18水平分别为(108.2±11.1)、(25.3±7.3)pg/ml,高于轻度AD组的(89.6±9.8)、(15.7±8.6)pg/ml,差异有统计学意义(P<0.05)。结论AD患者中血清Aβ1-42和p-tau-181均呈高表达,且其浓度与AD患者病情严重程度呈正相关。

关键词：阿尔茨海默病人β淀粉样蛋白1-42 人磷酸化tau-181蛋白

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浅谈PAB点爆试验仪表板骨架开裂问题优化方法

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汽车科技 2024年第2期 28-32页

作者：苌占波李成曹婉陈婧于来水岚图汽车科技有限公司武汉430056 武汉诚盛电子有限公司武汉430000

本文结合某项目包覆仪表板在PAB点爆试验过程中出现的仪表板骨架开裂问题,分析了导致此问题的各种影响因素,并根据分析结果制定了相应的优化措施,最终经过有针对性的优化改善,解决了仪表板骨架开裂问题,也为后续项目开发积累了经验,提... 详细信息

本文结合某项目包覆仪表板在PAB点爆试验过程中出现的仪表板骨架开裂问题,分析了导致此问题的各种影响因素,并根据分析结果制定了相应的优化措施,最终经过有针对性的优化改善,解决了仪表板骨架开裂问题,也为后续项目开发积累了经验,提供了参考。

关键词： PAB点爆仪表板骨架开裂优化方法

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Prevention of carbon migration in 9% Cr/CrMoV dissimilar welded joint by adding tungsten inert gas overlaying layer

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Journal of Iron and Steel Research International 2018年第8期25卷 847-853页

作者： Kai Ding Hui-jun Ji Xia Liu Peng Wang Quan-liang Zhang Xiao-hong Li yu-lai Gao State Key Laboratory of Advanced Special Steel Shanghai Key Laboratory of Advanced Ferrometallurgy School of Materials Science and Engineering Shanghai University Shanghai 200072 China Shanghai Electric Power Generation Equipment Co. Ltd.Shanghai Turbine Plant Shanghai 200240 China

High chromium （9-12% Cr） steels with excellent heat resistance and CrMoV steels with good toughness were potential candidates for combined rotor for steam turbine operated over 620℃. Two welding techniques were used to fabricate 9% Cr and CrMoV dissimilar welded joint. The results show that the carbon migration only appears in the specimen using narrow gap submerged arc welding （NG-SAW） technique, yet it can be effectively prevented by adding tungsten inert gas （TlG） overlaying process before the NG-SAW. The carbon migration occurred in NG-SAW resulting from the sharp transition of the strong carbide-forming element Cr between the weld （-2.7 wt%） and the base metal （- 9 wt%）. On the contrary, the application of TIG overlaying layers can promote the diffusion of Cr element, and therefore result in its much smaller concentration gradient. That is to say, a gentle transition zone of Cr element can be created among the SAW weld, TIG overlaying layers and the base metal, which effectively prevents the carbon migration and therefore produces a decreased carbon concentration adjacent to the fusion line.

关键词： Carbon migration Tungsten inert gas overlaying Gentle transition zone Narrow gap submerged arc welding Dissimilar welded joint

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Inner Attitude Integration Algorithm Based on Fault Detection for Strapdown Inertial Attitude and Heading Reference System

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Chinese Journal of Aeronautics 2010年第1期23卷 68-74页

作者： Liu Jianye,Zhu Yanhua,lai Jizhou,yu Yongjun Navigation Research Center,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China Navigation Research Center Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

This article proposes a new inner attitude integration algorithm to improve attitude accuracy of the strapdown inertial attitude and heading reference system （SIAHRS） , which, by means of a Kalman filter, integrates the calculated attitude from the accelerometers in inertial measuring unit （IMU） , called damping attitudes, with those from the conventional IMU. As vehicle＇ s acceleration could produce damping attitude errors, the horizontal outputs from accelerometers are firstly used to judge the vehicle＇ s motion so as to determine whether the damping attitudes could be reasonably applied. This article also analyzes the limitation of this approach. Furthermore, it suggests a residual chi-square test to judge the validity of damping attitude measurement in real time, and accordingly puts forward proper information fusion strategy. Finally,the effectiveness of the proposed algorithm is proved through the experiments on a real system in dynamic and static states.

关键词： navigation strapdown inertial attitude and heading reference system inner attitude integration algorithm internal damping Kalman filter residual chi-square test

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Formation of the anomalous microstructure in the weld metal of Co-based alloy/AISI 410 stainless steel dissimilar welded joint

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Advances in Manufacturing 2022年第2期10卷 250-259页

作者： Kai Ding yuan-Heng Zhang Shang-Fei Qiao Guan-Zhi Wu Tao Wei Xia Liu yu-lai Gao State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444People's Republic of China Shanghai Electric Power Generation Equipment Co. LtdShanghai Turbine PlantShanghai 200240People's Republic of China Shanghai Engineering Research Center for Metal Parts Green Remanufacture Shanghai 200444People's Republic of China

The Co-based alloy/AISI 410 stainless steel dissimilar welded joint was fabricated by the electron beam welding(EBW)*** anomalous microstructure containing the element transition zone(ETZ)and/or core of tail-like zone(CTLZ)is in the weld metal(WM)adjacent to the fusion *** melting temperature difference between the WM and AISI 410 steel,melt stirring effect and element diffusion can trigger the formation of such anomalous *** particular,the larger distance of the region in WM away from the fusion line,the smaller CTLZ and larger ETZ *** with the fine and ellipsoidal precipitates in the as-welded CTLZ,a large number of chain-type clustered precipitates were detected in the CTLZ and ETZ interface after the aging treatment at 566°C for 1000 *** element diffusion under elevated temperature in WM is regarded as the crucial factor for such anomalous microstructure evolution during the aging treatment.

关键词： Anomalous microstructure Aging treatment Dissimilar welded joint Co-based alloy AISI 410 stainless steel

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