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Comparison of the biomechanical performance of three spinal implants for treating the wedge-shaped burst fractures

Medicine in Novel Technology and Devices 2022年第1期13卷 71-78页

作者： Tingxiang Gong Yongtao lu liangliang Cheng Department of Engineering Mechanics Dalian University of TechnologyDalianChina DUT-BSU Joint Institute Dalian University of TechnologyNo.2 Linggong Road116024DalianChina Affiliated Zhongshan Hospital of Dalian University DalianChina

Spinal fracture is a serious problem impairing life quality,associating with low back pain and many other chronic *** all the spinal fractures,the rate of thoracolumbar fractures is the highest and accounts for approximately 90%.Although surgical treatment is an effective approach,it is still unclear which treatment method performs the *** aim of the present study was to investigate the biomechanical performance of three spinal implants for treating the thoracolumbar wedge-shaped burst fractures using the finite element(FE)*** model of the T12/L1/L2 spinal segment was created from CT images and the thoracolumbar wedge-shaped burst fractures were created by removing some elements in the anterior part of *** FE models of the traditional system,the universal spine system(USS)and the cortical bone trajectory(CBT)system were created and their biomechanical performances were *** results revealed that among the three fixation systems,the highest von-Mises stress occurred in the CBT *** all the loading scenarios except for the lateral bending,the maximal von-Mises stress was higher when the USS system rather than the traditional system was *** average displacement around the fracture site was the highest in the CBT *** for the lateral bending,the average displacement around the fracture site was higher when the USS system rather than the traditional system was *** all the fixation approaches,the highest von-Mises stress always occurred at the screw *** present study provided important data for the treatment of thoracolumbar wedge-shaped burst *** example,the traditional spinal system is preferentially selected for the thoracolumbar wedgeshaped burst fracture of L1.

关键词： Spinal fracture Fixation implant Finite element Biomechanical performance Stress analysis

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Transition of human diets and agricultural economy in Shenmingpu Site, Henan, from the Warring States to Han Dynasties

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Science China Earth Sciences 2012年第6期55卷 975-982页

作者： HOU liangliang WANG Ning lu Peng HU YaoWu SONG GuoDing WANG ChangSui Laboratory of Human Evolution Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Beijing 100044 China Department of Scientific History and Archaeometry Graduate University of Chinese Academy of Sciences Beijing 100049 China Instztute oJ Archaeology Chinese Academy of Social Sciences Beijing 100710 China

Historical records and archaeological remains indicate that the Chinese agricultural economy changed significantly from the Warring States （475-221 BC） to Han Dynasties （206 BC-220 AD）, i.e., from rice-millet based agriculture to rice-millet-wheat based agriculture. However, the variation of human diets and the inner relationship between human diets and the agricultural transition during this period remain poorly understood. In this paper, the C and N stable isotopes from human and animal bones at the Shenmingpu site （SMPS）, Xichuan County, Henan Province were analyzed. If some outliers （M34, M36, M102） were excluded, the mean δ13C value （（-16.7±0.8）‰, n=15） of humans in Hart Dynasties was dramatically lower than that in the Warring States （（-12.7±0.8）‰, n=14）, indicating that the cultivation of rice and wheat, especially wheat, had been more widely popularized in Han Dynasties. Meanwhile, the range of 615N values of humans （6.6‰-9.3‰） in Hart Dynasties was narrower than that of the Warring States （6.2‰-10.4‰）, suggesting that the animal protein resources in human foods during Han Dynasties were more concentrated. The transition of human diets and the close relationship with the change of agricultural economy in SMPS were due to more stable society, the carryout of new agricultural policies, and the emergence of new agri- cultural tools in Han Dynasties.

关键词： Shenmingpu site the Warring States to Han Dynasties C and N stable isotopes palaeodiet

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The effect of hydrogen on the recombination of Frenkel pair in tungsten： A theoretical insight

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Science China(Physics,Mechanics & Astronomy) 2017年第6期60卷 80-83页

作者： ShiYao Qin Shuo Jin liangliang Niu JianNan Hao HongBo Zhou GuangHong lu Department of Physics & Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang University Bei/ing 100191 China

Tungsten (W), with its primary advantages, is considered as the most promising candidate for plasma facing materials (PFMs) for the next generation of fusion devices such as ITER. However, continuous bombardment with 14.1 MeV neutron introduces Frenkel defects as the primary damage in W [1]. The Frenkel defects, composed of self-interstitial atoms (SIAs) and vacancies, can develop to extended defects such as voids and interstitial clusters, resulting in hardening, swelling and embrittlement of W, thus degrading the properties of W [2]. The recombination of SIAs and vacancies is an effective way to reduce the Frenkel defects in bulk W, which enhances the radiation resistance of W based on recent theoretical calculations [3,4]. The moving of the SIA to the vacancy could finish the recombination process through instantaneous or thermally activated way [3]. The instantaneous recombination region is an ellipse with the semi-minor axis of 5.4 ? and semi-major axis of 18 ? according to the molecular dynamics calculation [4].

关键词： Frenkel recombination tungsten interstitial insight degrading defects thermally swelling instantaneous

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Tunable double-resonance dimer structure for surface-enhanced Raman scattering substrate in near-infrared region

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Photonics Research 2015年第6期3卷 313-316页

作者： Zhengqing Qi Jie Yao liangliang Zhao Yiping Cui Changgui lu Advanced Photonics Center Southeast UniversityNanjing 210096China Nanjing Normal University Nanjing 210023China

Plasmonic resonance with Fano lineshape has attracted a great deal of recent interest. Here we design a new structure with a dimer grating upon a gold film separated by a layer of silica spacer, which has two resonant modes corresponding to the dimer’s localized surface plasmon resonance and the surface plasmon resonance excited by the dimer grating. This structure has three advantages for near-infrared detection in water. First, it provides two resonant modes to enhance the excitation and scattered signals of surface-enhanced Raman ***, coupling of these two modes results in a Fano resonance, providing a higher electric field ***, the dimer provides more flexible tunability compared to a single disk structure.

关键词： LSPR mode SERS

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盾构同步注浆引起土体变形的影响研究

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低温建筑技术 2022年第3期44卷 52-58页

作者：汪海林魏新江鲁梁梁刘映晶朱汉华张彪浙江大学建筑工程学院杭州310058 浙大城市学院杭州310015 中天建设集团有限公司杭州310009

壁后注浆是盾构隧道施工的关键环节,而同步注浆是为了减少盾构隧道施工对土体扰动而采取的壁后注浆方法之一,是盾构隧道施工的重要施工工艺,对土体变形有着显著的影响。从理论方法研究、数值计算、模型试验和实测分析等几个方面分别阐... 详细信息

壁后注浆是盾构隧道施工的关键环节,而同步注浆是为了减少盾构隧道施工对土体扰动而采取的壁后注浆方法之一,是盾构隧道施工的重要施工工艺,对土体变形有着显著的影响。从理论方法研究、数值计算、模型试验和实测分析等几个方面分别阐述了同步注浆对土体变形影响问题的研究现状,同时,结合工程实际总结分析了一些减小同步注浆引起的地表变形的措施,最后分析了盾构同步注浆对土体变形影响还存在的一些问题和可能的研究方向。

关键词：盾构法隧道施工同步注浆土体变形地表沉降或隆起注浆参数

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Au(Ⅰ)-BSA nanocomposites with assembling-induced excitation-dependent multicolor emission for dynamic cell imaging

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Science China Chemistry 2023年第1期66卷 174-184页

作者： Xuejuan Wang Guofeng Liu Kuo Fu Xuping Li Mengting Yao Qinghua lu liangliang Zhu Xiang Ma Shanghai Key Laboratory of Chemical Assessment and Sustainability Advanced Research Institute School of Chemical Science and EngineeringTongjiUniversityShanghai200092China Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Frontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Chemistry and Molecular EngineeringEast China University of Scienceand TechnologyShanghai 200237China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan University Shanghai 200438China

Excitation wavelength dependent(Ex-De) luminescent materials have attracted intense attention due to their great potential in multicolor bioimaging,dynamic anti-counterfeiting,and light emitting ***,it remains a formidable challenge to construct an Ex-De luminescent biomaterial with green starting materials,excellent biocompatibility,good water solubility,and multiple color emission for dynamic cell *** this work,nanocomposites based on the facile self-assembly strategy of bovine serum albumin(BSA) and Au(Ⅰ)-complex are rationally designed and synthesized to simultaneously present Ex-De fluorescence(429–516 nm) and decent phosphorescence(~615 nm) in a dilute aqueous *** analyses of spectroscopic and microscopic results reveal that the luminescent mechanism of Au(Ⅰ)-BSA nanocomposites is cluster-induced Ex-De fluorescence and metal-to-ligand charge transition(MLCT) based ***,based on the excellent biocompatibility,water-solubility and color-tunable emission over the entire visible region(360–800 nm),the Au(Ⅰ)-BSA nanocomposites are successfully used for cell imaging with multiple and switchable colors on *** is more,the solid tablets of Au(Ⅰ)-BSA nanoparticles showed pressure-responsive luminescence and decent room temperature *** work provides an assembling-induced emission strategy for the design of water-soluble,non-cytotoxic,and color-tunable luminescent biomaterials based on the composite of protein and Au nanoparticles.

关键词： nanocomposites excitation wavelength-dependent emission room temperature phosphorescence assembling-induced emission dynamic cell imaging

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灰岩储层多级交替注入酸压酸蚀规律研究

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油气地质与采收率 2024年第2期31卷 119-127页

作者：路依鑫齐宁周顺明王转转李雪松苏徐航王亮亮中国石油大学(华东)石油工程学院山东青岛266580 中国石油青海油田分公司勘探开发研究院甘肃敦煌736202

中国大部分灰岩储层埋藏深、低孔隙低渗透,受高温、高闭合压力、强非均质性等因素影响,常规盐酸酸压不易对其形成非均匀刻蚀,且改造效果差,影响了该类储层的高效开发。多级交替注入酸压技术可以通过酸液在前置液中多次形成黏性指进的方... 详细信息

中国大部分灰岩储层埋藏深、低孔隙低渗透,受高温、高闭合压力、强非均质性等因素影响,常规盐酸酸压不易对其形成非均匀刻蚀,且改造效果差,影响了该类储层的高效开发。多级交替注入酸压技术可以通过酸液在前置液中多次形成黏性指进的方式来更好地实现裂缝壁面的非均匀刻蚀,但多级交替注入酸压酸蚀规律尚不清晰,注酸级数的界限尚不明确,目前酸压设计多依靠经验方法进行。针对以上问题,在双尺度连续酸化模型的基础上,综合考虑黏度变化与注酸级数的影响,建立了灰岩储层多级交替注入酸压模型。基于多级交替注入酸压模型,将酸岩反应动力学、酸蚀裂缝实验数据、酸蚀数值模拟研究结果相结合,分析了酸液黏度、注酸排量及注酸级数等因素对酸压改造效果的影响,明确了灰岩储层多级交替注入酸压的酸蚀规律与注酸级数界限,通过引入酸液突破体积对现场优化提供依据。研究结果表明,为改善裂缝壁面的非均匀刻蚀程度,获得酸蚀裂缝的高导流能力,在地层温度为90℃时纯灰岩储层采用盐酸与稠化酸交替注入工艺,在注酸排量为5 m^(3)/min时加入0.4%非离子型聚丙烯酰胺的稠化酸。在此基础上,最佳注酸级数以不超过三级为宜,此时酸液突破体积最小,适用于现场施工。

关键词：多级酸压注酸级数酸蚀裂缝稠化酸灰岩

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医学生临床技能综合培训体系与考核体系的建立与实践

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中国高等医学教育 2016年第12期 7-8页

作者：卢书明马亮亮李艳霞孟华李春艳尚东杜建玲大连医科大学附属第一医院辽宁大连116011

临床基本技能是临床医学专业学生必备的基础能力,加强医学生临床技能培训、提高其临床实践能力是临床教学的主要任务。大连医科大学附属第一医院内科教研室构建了系统化技能培训体系和多站式技能考核体系,并在临床教学实践中加以应用,... 详细信息

临床基本技能是临床医学专业学生必备的基础能力,加强医学生临床技能培训、提高其临床实践能力是临床教学的主要任务。大连医科大学附属第一医院内科教研室构建了系统化技能培训体系和多站式技能考核体系,并在临床教学实践中加以应用,使医学生具备了较强的技能操作能力、较好的逻辑思维能力及较高的综合素质,为持续提高临床教学质量奠定坚实的基础。

关键词：临床教学临床技能培训考核

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外敷中药“接骨散”治疗地震伤员早期肿痛临床疗效观察

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中国现代医生 2011年第11期49卷 44-45页

作者：郭旗田和炳蒋小明吴蓉陆亮亮黄德军四川省德阳市旌阳区中医院(人民医院)康复科四川德阳618000

目的观察外敷中药"接骨散"缓解外伤肿痛的临床疗效和安全性。方法采用随机空白对照法,选择150例符合纳入标准的地震伤员,随机分为治疗组120例,对照组30例。在给予骨科基本处理的基础上,治疗组予每日1次外敷中药"接骨散",对照组不予该治... 详细信息

目的观察外敷中药"接骨散"缓解外伤肿痛的临床疗效和安全性。方法采用随机空白对照法,选择150例符合纳入标准的地震伤员,随机分为治疗组120例,对照组30例。在给予骨科基本处理的基础上,治疗组予每日1次外敷中药"接骨散",对照组不予该治疗,分别在第1、3、6、9、12、15天观察疼痛、肿胀程度。结果治疗后各观察时点两组疼痛均较治疗前明显减轻(P0.05);治疗组有8例发现轻微皮肤反应。结论外敷中药"接骨散"缓解外伤早期肿痛疗效确切、不良反应小。

关键词：接骨散外敷中药外伤肿痛

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公路工程试验检测常见问题及解决方法

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工程建设（维泽科技） 2022年第6期5卷 70-72页

作者：陆亮亮南通路桥工程有限公司江苏南通226000

公路工程是我国地区交流、人们出行必要的基础设施。鉴定公路质量方法中比较科学的就是对公路工程进行试验检测,但是目前我国的公路检测中还存在着很多问题,致使数据误差较大、设备利用率低,严重制约着我国公路事业的发展。基于此,将对... 详细信息

公路工程是我国地区交流、人们出行必要的基础设施。鉴定公路质量方法中比较科学的就是对公路工程进行试验检测,但是目前我国的公路检测中还存在着很多问题,致使数据误差较大、设备利用率低,严重制约着我国公路事业的发展。基于此,将对公路工程试验检测的意义、常见问题以及解决方法进行论述,以此来保证公路工程试验检测管理工作的有序开展。

关键词：公路工程试验检测常见问题解决方法

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