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动力打桩桩周泥岩损伤特性与损伤模型

土木工程学报 2024年第8期57卷 58-71页

作者：白晓宇银吉超张亚妹王永洪闫楠桑松魁青岛理工大学山东青岛266520

针对泥岩地基同施工场地条件下动力打入桩的承载力差异性大且部分打入桩承载力不足等异常现象,文章开展了桩周0.2m处打桩前后的桩周泥岩单轴抗压强度对比试验,和打桩后的桩端中风化泥岩三轴压缩试验,明确打桩后桩周泥岩的损伤特性,基于... 详细信息

针对泥岩地基同施工场地条件下动力打入桩的承载力差异性大且部分打入桩承载力不足等异常现象,文章开展了桩周0.2m处打桩前后的桩周泥岩单轴抗压强度对比试验,和打桩后的桩端中风化泥岩三轴压缩试验,明确打桩后桩周泥岩的损伤特性,基于统计损伤理论建立考虑受打桩影响的桩周泥岩损伤本构模型,并对泥岩地基打入桩的承载性能进行探讨。研究表明:打桩后桩周0.2m处泥岩强度平均损伤28.2%,弹性模量平均损伤41.4%;桩端中风化泥岩损伤后抗剪强度参数平均值为c=217.2kPa、φ=21.6°,φ仅是同场地原状强风化和全风化泥岩的49.1%和51.4%;打桩后桩周泥岩应力-应变曲线的损伤模型计算值的与实测值吻合较好,验证模型的合理性;泥岩地基打入桩承载力异常特征为桩端受力小,但桩端沉降显著,静载破坏时桩端阻力的平均占比为5.25%;动力打桩对桩周泥岩的损伤是泥岩地基打入桩承载力异常的重要原因;泥岩地基打入桩的设计计算与数值模拟采用原状泥岩力学参数不合理,泥岩损伤后不易恢复,建议按损伤特性赋予参数。研究结果对泥岩地基打入桩的设计、施工、承载力评价有较强的参考价值。

关键词：动力打桩泥岩单轴压缩试验三轴压缩试验损伤模型损伤变量承载力异常

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大直径嵌岩灌注桩承载特性试验与有限元模拟

重庆交通大学学报（自然科学版） 2024年第9期43卷 25-33页

作者：白晓宇刁浩杰银吉超桑松魁张亚妹张胜凯青岛理工大学土木工程学院山东青岛266520 中铁建投(青岛)城市开发建设有限公司山东青岛266031

基于青岛某工程的4根大直径嵌岩灌注桩,在现场开展了单桩竖向抗压静载试验和桩身完整性测试,以明确大直径嵌岩灌注桩在竖向荷载下的承载特征,拟揭示不同荷载水平下嵌岩灌注桩的承载力发挥机制。结合不同嵌岩深度的单桩承载性能有限元模... 详细信息

基于青岛某工程的4根大直径嵌岩灌注桩,在现场开展了单桩竖向抗压静载试验和桩身完整性测试,以明确大直径嵌岩灌注桩在竖向荷载下的承载特征,拟揭示不同荷载水平下嵌岩灌注桩的承载力发挥机制。结合不同嵌岩深度的单桩承载性能有限元模拟,重点分析了单桩在不同嵌岩深度下的竖向抗压承载特性和桩土位移分布特征。研究表明:在笔者试验条件下,大直径嵌岩灌注桩单桩竖向抗压承载力具有一定离散性,桩头部位的损坏会极大影响单桩承载力的有效发挥;加载完成后,数值模拟得到的桩顶沉降量为31.56 mm,约为现场实测值的1.1倍,模拟结果与实测结果较为吻合;通过不同嵌岩比的模拟结果对比发现,嵌岩深度越大桩端阻力占桩顶荷载的比例越小,且桩端阻力占比的变化速率随着嵌岩比的增加逐渐减缓;嵌岩深度取2.5倍桩径为宜。

关键词：岩土工程嵌岩桩泥浆护壁成孔灌注桩单桩竖向抗压承载力承载力异常现场试验数值模拟

Effect of Zuogui pill and Yougui pill on osteoporosis： a randomized controlled trial

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Journal of Traditional Chinese Medicine 2018年第1期38卷 33-42页

作者： Li Wenxiong Zhang Kuaiqiang Liu Zhu Liu Li Cheng Yan yin jichao Sun yindi Yang Feng Institute of Orthopedics Shaanxi University of Traditional Chinese Medicine Xi'an 712000 China Department of Orthopedics Affiliated Hospital of Shaanxi University of Traditional Chinese Medicine Xi'an 712083 China Department of Orthopedics Shaanxi Province Hospital of TCM Xi'an 710021 China Department of Orthopedics Xi'an Hospital of TCM Xi'an 710021 China Department of Orthopedics Xi'an Honghui Hospital Xi'an 710021 China

OBJECTIVE： To evaluate the effect and safety of Zuogui pill and Yougui pill, classic Y/n and Yang tonic formula （CYYTF）, in the treatment of osteoporosis and the underlying mechanism. METHODS： Participants aged 55 to 75 with osteoporosis and Kidney deficiency in Traditional Chi-nese Medicine （TCM） will be included and randomly allocated into two groups： treatment group and control group. Participants in the treatment group were treated with Zuogui pill or Yougui pill TCM formula granule, while the control group received pla- cebo. Primary outcomes are the lumbar spine on bone mineral density （BMD）（L1-4） and femoral BMD. Secondary outcomes include pain intensity, health-related quality of life （HRQoL）, bone turn- over markers and safety. RESULTS： Totally 200 patients were enrolled from December 2014 to April 2016 from four hospitals. There were no statistically significant differences between the two groups at baseline （P 〉 0.05） and it was good to comparability. Statistically signifi- cant differences between the two groups were ob- served for the lumbar BMD （L1-4）, pain VAS scores and HRQoL at six months and twelve months and femoral BMD at twelve months （P 〈 0.05）, but no significant differences for femoral BMD and bone turnover markers at six months （P 〉 0.05）. More- over, significant difference was observed at differ- ent time before and after treatment in terms of lum- bar spine （L1-4） BMD, femoral BMD, pain VAS scores and health-related quality of life, and there was an crossover effect between the time and groups be- fore and after treatment. In additional, in the treat- ment group, 8 patients lost to follow-up and 3 patients had adverse events （AEs） and in the control group, 10 patients lost to follow-up and 2 patients had AEs. No remarkable differences were observed between the two groups with regard to AEs, lost rate and safety （P 〉 0.05）. CONCLUSION： Zuogui pill or Yougui pill could improve BMD, ease pain, relieve Kidney deficiencysyndrome, improve the q

关键词： Bone resorption Osteoporosis Zuo Gui Wan You Gui Wan Treatment outcome Quality of life

中风化花岗岩中嵌岩桩承载性能原位试验与极限承载力预测

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河北工程大学学报（自然科学版） 2024年第3期41卷 49-58页

作者：刘超白晓宇银吉超卫永辉谭永明孟德朝青岛理工大学土木工程学院山东青岛266520 中建四局西北建设有限公司陕西西安710117 中铁二十二局集团有限公司北京100043 中国建筑第五工程局有限公司湖南长沙410004

为深入探究中风化花岗岩中嵌岩桩的竖向抗压承载特性,对12根嵌岩桩进行了单桩竖向抗压静载原位试验与ABAQUS有限元数值模拟,通过多种方法对嵌岩单桩极限承载力进行评价,明确中风化花岗岩中嵌岩桩竖向抗压承载性状。研究表明:12根中风化... 详细信息

为深入探究中风化花岗岩中嵌岩桩的竖向抗压承载特性,对12根嵌岩桩进行了单桩竖向抗压静载原位试验与ABAQUS有限元数值模拟,通过多种方法对嵌岩单桩极限承载力进行评价,明确中风化花岗岩中嵌岩桩竖向抗压承载性状。研究表明:12根中风化花岗岩中嵌岩桩并非表现出完全端承桩,而是呈摩擦型桩或摩擦端承桩的性状;中风化花岗岩地基中的嵌岩桩竖向抗压极限承载力较高,桩顶沉降小,满足工程对基础的承载要求;有限元模拟荷载-沉降曲线与实测荷载-沉降曲线走势吻合度较高,桩顶沉降误差较小;本试验条件下,桩端阻力占桩顶荷载的56.9%,桩侧摩阻力占比为43.1%,桩侧摩阻力在荷载传递过程中发挥较充分;有限元模拟得到的单桩极限承载力与指数函数模型的预测结果较为吻合,可用于嵌岩桩单桩竖向抗压极限承载力的预测,以及嵌岩桩承载性状和荷载传递规律的分析。

关键词：嵌岩桩中风化花岗岩承载性能原位试验单桩极限承载力预测数值模拟

Study on the Regulation of Qinxitong Combined with Methotrexate Tablets on Multiple Inflammatory Indicators and Mechanism Factors in Rheumatoid Arthritis

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Journal of Clinical and Nursing Research 2021年第6期5卷 113-117页

作者： Zhaoyang Dong jichao yin Shaanxi University of Traditional Chinese Medicine Xianyang 712046Shaanxi ProvinceChina Xi’an Health School Xi'an 710000Shaanxi ProvinceChina

Objective:To study the changes of several inflammatory index mechanism factors in the clinical efficacy of tablet and methotrexate in rheumatoid ***:20 patients with rheumatoid arthritis were randomly divided into observation(n=10)and control(n=10),then normal people as normal(n=10),all three groups were given methotrexate and the observation group were treated with Qin interest pain *** of inflammatory index mechanism factors in each ***:After treatment,inflammatory index mechanism factors were detected;a significant decrease of IFN-g,IL-1b,IL-10,IL-37,TNF-a and other factors was found before and after combination treatment(P<0);IL-8 and IL-13 expression(P<0);the CRP,ESR score of the study group was lower than the control group(P<0.05);and the inflammatory index mechanism factors were affected by drug ***:Tablets combined with methotrexate in rheumatoid arthritis patients is better than *** obviously changed the expression of the patient’s inflammatory index mechanistic factors,which has a regulatory effect on the inflammatory mechanistic factors.

关键词： Rheumatoid arthritis Qin pain Methotrexate

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强直性脊柱炎发病与二十四节气相关性研究

陕西中医 2024年第1期45卷 75-79页

作者：吴智龙殷继超胡兴律刘英纯刘诗若李霖赵宇陕西中医药大学陕西咸阳712046 西安市卫生学校陕西西安710054 西安市中医医院陕西西安710021 西安市第五医院陕西西安710082

目的:分析陕西地区近19年强直性脊柱炎发病与二十四节气间的相关性,从时间医学角度为因时制宜理论提供临床依据。方法:采用回顾性研究方法对西安市第五医院2002年2月4日至2020年2月3日收治的12645例强直性脊柱炎住院患者的病历资料进行... 详细信息

目的:分析陕西地区近19年强直性脊柱炎发病与二十四节气间的相关性,从时间医学角度为因时制宜理论提供临床依据。方法:采用回顾性研究方法对西安市第五医院2002年2月4日至2020年2月3日收治的12645例强直性脊柱炎住院患者的病历资料进行分析,应用圆形统计分析确定其发病高峰节气及相对高峰期。结果:2002-2020年陕西地区强直性脊柱炎患者的在发病节气上具有集中趋势(Z=47.73,P<0.05),大暑(8月5日)是发病的高峰节气,相对高峰期为春分到大雪(3月21日至12月20日)。结论:强直性脊柱炎虽不是季节性流行病,但是其发病与气候、环境及二十四节气的变化有一定的影响,陕西地区强直性脊柱炎的发病节气具有一定的集中趋势,大暑前后是发病高峰期,提示应注意该节气期间疾病的预防和早期治疗。

关键词：强直性脊柱炎圆形统计分析二十四节气气候因时制宜发病季节

肌骨超声检查在肌筋膜疼痛综合征临床诊疗中的应用研究进展

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医学影像学杂志 2024年第3期34卷 113-116页

作者：王琛殷继超胡兴律王墉琦刘诗若许磊王超王轩王孟陕西中医药大学陕西西安712046 西安市卫生学校陕西西安710054 陕西省西安市中医医院脊柱科陕西西安710021 陕西省西安市中医医院超声科陕西西安710021

肌筋膜疼痛综合征是以骨骼肌疼痛、功能障碍和肢体运动范围受限为主要表现的综合征,肌筋膜疼痛触发点是该病的诱发因素,准确定位以及评估肌筋膜疼痛触发点特征是该疾病诊断和治疗的核心。肌骨超声检查能够显示肌筋膜疼痛触发点的图像,... 详细信息

肌筋膜疼痛综合征是以骨骼肌疼痛、功能障碍和肢体运动范围受限为主要表现的综合征,肌筋膜疼痛触发点是该病的诱发因素,准确定位以及评估肌筋膜疼痛触发点特征是该疾病诊断和治疗的核心。肌骨超声检查能够显示肌筋膜疼痛触发点的图像,测量相关的超声影像学指标,为肌筋膜疼痛综合征的临床诊断和疗效评价提供客观依据。本文就肌骨超声检查在肌筋膜疼痛综合征临床诊疗中的应用进展进行了综述。

关键词：肌筋膜疼痛综合征肌筋膜疼痛触发点肌骨超声检查疗效评价

High-efficiency Multiplexed Buck-type PFC Converter

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CSEE Journal of Power and Energy Systems 2024年第3期10卷 1053-1063页

作者： Lunquan Li Qianhong Chen jichao Huang Bin Liu School of Automation Nanjing University of Aeronautics and AstronauticsNanjing 211106China Gaoyi Zhineng Electric Ltd. Shenzhen 518101China School of Information Engineering Nanchang Hang Kong UniversityNanchang 330063China IEEE CSEE

This paper proposes a high-efficiency PFC rectifier based on multiplexing the *** with a traditional six-switch PFC rectifier,the proposed rectifier extends the switches’active angle by making use of three bridge *** a result,lower conduction resistance can be realized for ***,system efficiency can be *** with a traditional six-switch PFC rectifier with doubled switches,the proposed rectifier can achieve almost the same efficiency improvement while no additional switches are *** continuous inductor current is chopped and resulting current pulses cannot be injected into the grid directly,input filter design and resonance damping are discussed for the proposed *** controller design of the rectifier is *** inductor current reference is shaped considering the input voltage envelope and forward ***,the effectiveness of the proposed rectifier is verified through simulations and experiments.

关键词： Buck-type rectifier commutation state controller design efficiency multiplex

Multi-Scale Fusion Model Based on Gated Recurrent Unit for Enhancing Prediction Accuracy of State-of-Charge in Battery Energy Storage Systems

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Journal of Modern Power Systems and Clean Energy 2024年第2期12卷 405-414页

作者： Hao Liu Fengwei Liang Tianyu Hu jichao Hong Huimin Ma School of Computer and Communication Engineering University of Science and Technology BeijingBeijingChina School of Mechanical Engineering University of Science and Technology BeijingBeijingChina IEEE

Accurate prediction of the state-of-charge(SOC)of battery energy storage system(BESS)is critical for its safety and lifespan in electric *** overcome the imbalance of existing methods between multi-scale feature fusion and global feature extraction,this paper introduces a novel multi-scale fusion(MSF)model based on gated recurrent unit(GRU),which is specifically designed for complex multi-step SOC prediction in practical *** correlation analysis is first employed to identify SOC-related *** parameters are then input into a multi-layer GRU for point-wise feature ***,the parameters undergo patching before entering a dual-stage multi-layer GRU,thus enabling the model to capture nuanced information across varying time ***,by means of adaptive weight fusion and a fully connected network,multi-step SOC predictions are *** extensive validation over multiple days,it is illustrated that the proposed model achieves an absolute error of less than 1.5%in real-time SOC prediction.

关键词： Electric vehicle battery energy storage system(BESS) state-of-charge(SOC)prediction gated recurrent unit(GRU) multi-scale fusion(MSF).