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Neural Regeneration Research 2018年第6期13卷 1096-1106页

作者： Chuan Qin Wen-Hao Zhang De-Gang yang Ming-liang yang liang-Jie Du Jian-Jun Li School of Rehabilitation Medicine. Capital Medical University Beijing China Department of Spinal and Neural Functional Reconstruction China Rehabilitation Research Center Beijing China Beijing Key Laboratory of Neural Injury and Rehabilitation Beijing China China Rehabilitation Science Institute Beijing China Center of Neural Injury and Repair Beijing Institute for Brain Disorders Beijing China

OBJECTIVE： To investigate the effects of myelotomy on locomotor recovery in rats subjected to spinal cord injury. DATA SOURCES： Electronic databases including Pub Med, Science Citation Index, Cochrane Library, China National Knowledge Infrastructure, Chinese Journals Full-text Database, China Biology Medicine disc, and Wanfang Database were searched to retrieve related studies published before September 2017. The Me SH terms（the Medical Subject Headings） such as ＂myelotomy＂, ＂spinal cord injuries＂, ＂rats＂, ＂randomized controlled trial＂ and all related entry terms were searched. DATA SELECTION： Randomized controlled trials using myelotomy for the treatment of acute spinal cord injury in rats were included. Basso, Beattie, and Bresnahan scores were adopted as the evaluation method. Rev Man Software（version 5.3） was used for data processing. The χ^2 and I^2 tests were used to assess heterogeneity. Using a random-effects model, a subgroup analysis was conducted to analyze the source of the heterogeneity. OUTCOME MEASURES： Basso, Beattie, and Bresnahan scores were observed 1–6 weeks after spinal cord ***： Six animal trials were included, using a total of 143 lab rats. The included trials were divided into two subgroups by injury degrees（moderate or severe）. The pooled results showed that, 1–6 weeks after spinal cord injury, the overall Basso, Beattie, and Bresnahan score was significantly higher in the myelotomy group than in the contusion group（weighted mean difference（WMD） = 0.60; 95% confidence interval（CI）： 0.23–0.97; P = 0.001; WMD = 2.10; 95% CI： 1.56–2.64; P 〈 0.001; WMD = 2.65; 95% CI： 1.73–3.57; P 〈 0.001; WMD = 1.66; 95% CI： 0.80–2.52; P 〈 0.001; WMD = 2.09; 95% CI： 0.92–3.26, P 〈 0.001; WMD = 2.25; 95% CI： 1.06–3.44, P 〈 0.001）. The overall heterogeneity was high（I^2 = 85%; I^2 = 95%; I^2 = 94%; I^2 = 88%; I^2 = 91%; I^2 = 89%）. The results in the moderate injury subgroup showed that Basso, Beattie, and Bresnahan scores were significantly higher in

关键词： nerve regeneration spinal cord injury myelotomy locomotor recovery rats rehabilitation moderate injury randomized controlled trials systematic review meta-analysis neural regeneration

Influence of the embedded structure on the EFP formation of compact terminal sensitive projectile

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Defence Technology（防务技术） 2017年第4期13卷 310-315页

作者： Bo-yang Xing Rong-zhong Liu Rui Guo liang Chen Hao Zhou Yong-liang yang Lei Liu School of Mechanical Engineering Nanjing University of Science and Technology Faculty of Engineering University of Nottingham Department of Mechanical Engineering Eindhoven University of Technology

To improve the damage efficiency of compact terminal sensitive projectile with EFP warhead,it is vital to understand how the embedded structure(ES)affects the EFP forming *** this paper,the corresponding numerical investigation is focused on,in which the fluid-structure interaction(FSI)method and the experimental verification are *** on the obtained quantitative relations between the forming performance and a(the ratio of height to maximum radius of ES),an optimal design is further *** results indicate that:when the embedded structural length and width range 0.1e0.3D and 0.1e0.2D(D:diameter of EFP warhead)at a fixed volume,respectively,EFP forming velocity nearly keeps as a constant,1760 m/s;the height of ES has a dramatical effect on the propagating range of detonation wave,resulting in significant influence on the aerodynamic shape and length-to-diameter ratio of EFP;under the given constraints,the EFP length-diameter ratio can reach the optimal value2.76,when the height of ES is 0.22D.

关键词： Terminal sensitive projectile Embedded structure Detonation wave EFP formation

基于CWQI的岷江眉山开发利用区水质时空分布特征研究

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四川水利 2024年第4期45卷 85-89,135页

作者：任玖杨亮陈佳琪四川水利职业技术学院四川崇州611231 四川晟堡途工程技术服务有限公司成都611131

水质评价是水环境规划和治理的基础,CWQI水质指数综合评价法是评价和识别复杂水环境问题的重要方法。根据岷江眉山开发利用区2016-2020年逐月水质监测数据,利用CWQI法分析研究区水质时空分布特征。结果表明,研究区5年内CWQI值持续提升,... 详细信息

水质评价是水环境规划和治理的基础,CWQI水质指数综合评价法是评价和识别复杂水环境问题的重要方法。根据岷江眉山开发利用区2016-2020年逐月水质监测数据,利用CWQI法分析研究区水质时空分布特征。结果表明,研究区5年内CWQI值持续提升,级别均为优秀,各月份水质较为稳定;除高坝子排污控制区为良好,其余水功能区均为优秀。CWQI法与单因子法评价结果较一致,但前者在水质时空分布研究中更客观,具有更广阔的应用空间。

关键词： CWQI法岷江眉山开发利用区单因子评价法水质时空分布特征

励磁电流对TMPS-HESM振动噪声影响的仿真分析

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计算机仿真 2024年第2期41卷 321-327页

作者：庞亮赵朝会杨清亮秦海鸿上海电机学院电气学院上海201306 上海海事大学物流工程学院上海201306 南京航空航天大学自动化学院江苏南京210016

为了研究励磁电流对切向聚磁型并联结构混合励磁电机(TMPS-HESM)振动噪声的影响,根据TMPS-HESM切向聚磁特点,建立电机等效磁路模型和Maxwell有限元仿真模型,在不同励磁电流条件下仿真分析了与电机振动噪声有关的转矩脉动、气隙磁密和电... 详细信息

为了研究励磁电流对切向聚磁型并联结构混合励磁电机(TMPS-HESM)振动噪声的影响,根据TMPS-HESM切向聚磁特点,建立电机等效磁路模型和Maxwell有限元仿真模型,在不同励磁电流条件下仿真分析了与电机振动噪声有关的转矩脉动、气隙磁密和电磁力等电磁性能。利用ANSYS Workbench仿真平台搭建了电磁振动噪声耦合仿真模型,计算了不同励磁电流条件下电机的振动响应与噪声变化。结果表明:励磁电流对混合励磁电机转矩脉动影响较小,对电机径向电磁力谐波(8,2f1)、(16,4f1)、(0,12f1)分量影响较大,是造成电机振动噪声的主要原因,其中(0,12f1)分量虽然与其它分量不是一个数量级,但仍会恶化电机振动噪声。

关键词：混合励磁切向聚磁型励磁电流电磁振动噪声仿真

基于SAR阻抗匹配的WPT最大效率跟踪控制方法

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电子器件 2024年第1期47卷 188-193页

作者：郑宏尤涛许奕然杨亮江苏大学电气信息工程学院江苏镇江212013 中国矿业大学(徐州)电气与动力工程学院江苏徐州221116

无线电能传输(WPT)技术因其安全、便捷、非接触等优点而备受关注。最大效率传输是WPT系统中一个重要课题。传统的最大效率跟踪方法通常设定系统在固定耦合条件进行负载阻抗匹配,然而,耦合系数会在初级和次级线圈相对位置变化时不可避免... 详细信息

无线电能传输(WPT)技术因其安全、便捷、非接触等优点而备受关注。最大效率传输是WPT系统中一个重要课题。传统的最大效率跟踪方法通常设定系统在固定耦合条件进行负载阻抗匹配,然而,耦合系数会在初级和次级线圈相对位置变化时不可避免地发生变化。提出基于耦合系数辨识与半有源整流(SAR)阻抗匹配的最大效率跟踪控制方法,该方法利用SAR结合耦合系数识别进行阻抗匹配,开关控制电容(SCC)补偿其阻抗虚部,避免了整流电路中非线性因素的影响。同时系统响应较快且控制方法便于实现。仿真和实验结果表明,耦合系数和等效负载变化时,都可以准确估计耦合系数并跟踪至最大效率点和输出恒压。

关键词：无线电能传输(WPT) 最大效率跟踪 SAR阻抗匹配耦合系数辨识

Interactions between Pre-strain and Dislocation Structures and Its Effect on the Hydrogen Trapping Behaviors

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Acta Metallurgica Sinica(English Letters) 2023年第7期36卷 1193-1202页

作者： Rongjian Shi Yanqi Tu liang yang Saiyu Liu Shani yang Kewei Gao Xu-Sheng yang Xiaolu Pang Beijing Advanced Innovation Center for Materials Genome Engineering School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing100083China School of Mathematics and Physics University of Science and Technology BeijingBeijing100083China Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen518057China Key Laboratory for Advanced Materials of Ministry of Education School of Materials Science and EngineeringTsinghua UniversityBeijing100084China

This work investigated the effect of pre-strain and microstructures and their interactions on hydrogen trapping behaviors in case of 1-GPa high-strength martensitic steel Fe-0.05C-0.30Si-1.10Mn-3.50Ni-0.53Cr-0.50Mo-0.03 V(wt%).We found that the trapped reversible and trapped irreversible hydrogen contents increased significantly after applying a pre-strain of 5%,with an increase in the trapped reversible hydrogen content from 0.6 ppm in the original sample to 2.1 *** hydrogen desorption activation energy also showed a slight *** microstructural evolution revealed that the concomitant dislocation cell-twin duplex microstructure with high-density tangled dislocations after pre-strain substantially increased the trapped reversible hydrogen ***,the tangled dislocations pinned by the nanoprecipitates acted as deep irreversible hydrogen traps,increasing the trapped hydrogen at high temperatures after applying 5%*** findings provide an expanded understanding of the hydrogen trapping behaviors of pre-strained microstructures.

关键词： Hydrogen embrittlement Hydrogen trapping Pre-strain Deformed microstructure High-strength steel

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大功率风机主轴滑动轴承研究现状及发展趋势

中国机械工程 2024年第10期35卷 1711-1721页

作者：朱才朝张荣华宋朝省谭建军杨亮重庆大学高端装备机械传动全国重点实验室重庆400044 大连三环复合材料技术开发股份有限公司大连116103

风电机组大型化步伐加快,核心零部件的可靠性对风机运行的影响越来越大。滑动轴承具有高承载、长寿命、易维护、可扩展、小体积等优点,对风机主轴承关键零部件的国产安全可靠替代水平提高具有显著作用和很大潜力。分析了大功率风机主轴... 详细信息

风电机组大型化步伐加快,核心零部件的可靠性对风机运行的影响越来越大。滑动轴承具有高承载、长寿命、易维护、可扩展、小体积等优点,对风机主轴承关键零部件的国产安全可靠替代水平提高具有显著作用和很大潜力。分析了大功率风机主轴滚动轴承存在的问题与主轴应用滑动轴承的优势,并详细论述了风机主轴滑动轴承设计、材料、润滑、试验验证等多方面的技术方法和应用现状,总结了大功率风机主轴滑动轴承存在的问题及未来的发展趋势,为大功率风电主轴承数字化设计与产业发展提供参考。

关键词：滑动轴承构型设计润滑理论材料改性轴承试验风机主轴

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Design of the Pneumatic Pressure Smart Shoes for an Ankle-Assisted Exoskeleton

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Journal of Bionic Engineering 2023年第4期20卷 1613-1625页

作者： Tianwen Yao Jiliang Lv liang yang Aimin Xu Shengguan Qu School of Mechanical and Automotive Engineering South China University of TechnologyGuangzhou510640China

Ankle injury is one of the most common joint diseases that people experience during *** people have suffered ankle injuries at least once in their *** studies have shown that the ankle joint provides the most power and torques during the act of walking,compared to the knee and hip *** paper presents an ankle joint exoskeleton device,which is mainly used to provide assistance and protection to the human ankle joint with a pneumatic assist drive during *** pneumatic pressure smart shoes for this ankle exoskeleton were designed for detecting the human gaits to control the exoskeleton with certain supporting forces to the ankle joints at the appropriate *** smart shoe has two sensors placed in between the wearable layer and the *** changes of the foot pressures were measured by the sensors for a microcontroller to control the *** sets of experimental tests which were 2-month trials and gait selection were used to test the *** experiments of 2-month trials were made to evaluate the stability of the *** results showed that the shoes had no damages,no air leakage,and no malfunctions after the *** trials of gait selection were made to test the recognition rate which reached at 99.9%for the shoe *** results showed that the design of the pneumatic smart shoes for the ankle-assisted exoskeleton met the requirements.

关键词： Exoskeleton Pneumatic pressure sensor Gait detection Ankle joint Bionic

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成都市餐饮源VOCs排放特征

环境化学 2024年第2期43卷 600-613页

作者：胡秋萍费怡陈耀周子航张雷杨亮王斌陈茁四川大学建筑与环境学院成都610065 成都市环境保护科学研究院成都610072 四川佳士特环境检测有限公司成都611700 成都市污染源监测中心成华区监测站成都610056

为研究成都市餐饮源VOCs排放特征,建立成都市餐饮源114种VOCs成分谱,本研究选择11个监测对象进行VOCs组分分析,并探索餐饮源VOCs全组分特征.结果表明,餐饮源VOCs中烷烃占比为23.12%—30.29%,烯烃占比为8.61%—25.78%,芳香烃占比为0.16%... 详细信息

为研究成都市餐饮源VOCs排放特征,建立成都市餐饮源114种VOCs成分谱,本研究选择11个监测对象进行VOCs组分分析,并探索餐饮源VOCs全组分特征.结果表明,餐饮源VOCs中烷烃占比为23.12%—30.29%,烯烃占比为8.61%—25.78%,芳香烃占比为0.16%—5.86%,卤代烃占比为0.86%—13.82%,OVOCs占比为28.02%—63.77%,其他占比为2.02%—8.26%.OVOCs、烷烃和烯烃3类占比最高,3类污染物累计质量浓度百分比在75%以上,是餐饮源重要的污染物类型.餐饮源排名前10的VOCs分别是丙烯醛(11.12%)、乙烷(9.87%)、乙醛(9.51%)、丙酮(9.34%)、乙烯(7.86%)、正戊烷(5.74%)、乙炔(5.01%)、丁二烯(4.64%)、顺式-1,3-二氯-1-丙烯(3.40%)和乙酸乙酯(3.04%),是餐饮源的特征污染物.餐饮源全组分分析得到OVOCs的代表性物质为反式茴香脑和芳樟醇等,烯烃代表性物质为长叶烯和柠檬烯等,烷烃代表性物质为正十五烷和正庚烷等,为完善餐饮源成分谱物种、探寻餐饮源特征污染物的研究提供参考.采用FAC法计算餐饮源VOCs二次有机气溶胶生成潜势.餐饮源SOA生成潜势为1220.7μg·m^(-3),芳香烃SOA生成潜势贡献率为93.1%,烷烃SOA生成潜势贡献率为6.9%.

关键词：餐饮源成分谱挥发性有机物(VOCs) 成都市