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切坡卸载下原状黄土裂隙宏细观损伤规律研究

路基工程 2023年第6期 46-51页

作者：赵雷陈科旭郭志亮刘浩李乐中铁十九局集团有限公司北京100176 西安科技大学西安710000

黄土崩塌是一种危害性极大的地质灾害,而黄土节理裂隙发育是引起黄土崩塌的最主要原因。针对切坡卸载对黄土边坡节理裂隙发展的影响,选取富县Q_(2)原状黄土,通过常规三轴仪模拟边坡开挖,结合CT扫描图像定性、定量分析及图像二值化处理,... 详细信息

黄土崩塌是一种危害性极大的地质灾害,而黄土节理裂隙发育是引起黄土崩塌的最主要原因。针对切坡卸载对黄土边坡节理裂隙发展的影响,选取富县Q_(2)原状黄土,通过常规三轴仪模拟边坡开挖,结合CT扫描图像定性、定量分析及图像二值化处理,研究原状黄土损伤过程。宏观试验结果表明:侧向速率和卸荷幅度对原状黄土的节理裂隙发育有较大影响;卸荷速率越大,土样内部裂隙就越多,土样也更容易破坏;侧向卸荷幅度越大,土体内部节理裂隙发育越明显,土样的破坏也从微小的裂隙变化转变为瞬间破坏。细观试验结果表明:卸荷速率和幅度越大,CT扫描阴影区域越大,土样越容易破坏。定量分析结果表明:卸荷幅度对土样结构影响最为显著。

关键词：卸荷速率卸荷幅度 CT扫描图像二值化处理定量分析

A New D-GCL for Unidirectional Motion with Large Displacement

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Transactions of Nanjing University of Aeronautics and Astronautics 2018年第1期35卷 154-161页

作者： Zhu Yixi Lu zhiliang guo Tongqing ollege of Aerospace Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016P.R.China

Numerical simulations of unsteady flow problems with moving boundaries commonly require the use of geometric conservation law(GCL).However,in cases of unidirectional large mesh deformation,the cumulative error caused by the discrete procedure in GCL can significantly increase,and a direct consequence is that the calculated cell volume may become *** control the cumulative error,a new discrete GCL(D-GCL)is *** the original D-GCL,the proposed method uses the control volume analytically evaluated according to the grid motion at the time level n,instead of using the calculated value from the D-GCL *** analysis indicates that the truncation error of the numerical scheme is guaranteed to be the same order as that obtained from the original D-GCL,while the accumulated error is greatly *** validation,two challenging large deformation cases including a rotating circular cylinder case and a descending GAW-(1)two-element airfoil case are selected to be *** agreements are found between the calculated results and some other literature data,demonstrating the feasibility of the proposed D-GCL for unidirectional motions with large displacements.

关键词： cumulative error control geometric conservation law(GCL) unsteady flow unidirectional motion large mesh deformation

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初善仪在子宫颈病变筛查系统中的应用

广州医药 2011年第5期42卷 37-39页

作者：范雪梅张秋实郭芝亮广州市妇女儿童医疗中心妇婴医院院区妇产科 510180

目的探讨宫颈癌筛查系统初善仪(TruScreen)在子宫颈病变诊断中的临床意义。方法对38例在我院妇科门诊行LCT检查(采用TBS分类标准)阳性(ASCUS及以上)者依次进行TruScreen及阴道镜下活检,以阴道镜下病理学检查为金标准,比较宫颈癌筛查系统... 详细信息

目的探讨宫颈癌筛查系统初善仪(TruScreen)在子宫颈病变诊断中的临床意义。方法对38例在我院妇科门诊行LCT检查(采用TBS分类标准)阳性(ASCUS及以上)者依次进行TruScreen及阴道镜下活检,以阴道镜下病理学检查为金标准,比较宫颈癌筛查系统TruScreen(初善仪)与病理结果的符合程度,验证初善仪对宫颈癌前病变的准确性。结果 38例检查者中TruScreen阳性结果为16例,病理学检查结果为阳性15例。TruScreen的敏感度、特异度及假阴性率分别为73.33%、78.26%和26.67%。采用Kappa检验,Kappa=0.51,P<0.01,差异有统计学意义。结论 TruScreen可作为一种新的宫颈癌筛查方法,尤其适用于经济不发达的贫困地区。

关键词：初善仪 (TruScreen) 液基细胞学检测宫颈病变

Synthesis of mesoporous Cu/Mg/Fe layered double hydroxide and its adsorption performance for arsenate in aqueous solutions

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Journal of Environmental Sciences 2013年第5期25卷 944-953页

作者： Yanwei guo zhiliang Zhu Yanling Qiu Jianfu Zhao State Key Laboratory of Pollution Control and Resource Reuse Tongji University Key Laboratory of Yangtze River Water Environment Ministry of EducationTongji University

The mesoporous Cu/Mg/Fe layered double hydroxide（Cu/Mg/Fe-LDH） with carbonate intercalation was synthesized and used for the removal of arsenate from aqueous *** Cu/Mg/Fe-LDH was characterized by Fourier transform infrared spectrometry,X-ray diffraction crystallography,scanning electron microscopy,X-ray photoelectron spectroscopy and *** of various physico-chemical parameters such as pH,adsorbent dosage,contact time and initial arsenate concentration on the adsorption of arsenate onto Cu/Mg/Fe-LDH were *** showed that it was efficient for the removal of arsenate,and the removal efficiency of arsenate increased with the increment of the adsorbent dosage,while the arsenate adsorption capacity decreased with increase of initial pH from 3 to *** adsorption isotherms can be well described by the Langmuir model with R 2 〉 *** adsorption kinetics followed the pseudo second-order kinetic *** ions such as HPO42-,CO32-,SO42and NO3could compete with arsenate for adsorption sites on the Cu/Mg/*** adsorption of arsenate on the adsorbent can be mainly attributed to the ion exchange *** was found that the synthesized Cu/Mg/Fe-LDH can reduce the arsenate concentration down to a final level of 〈 10 μg/L under the experimental conditions,and makes it a potential material for the decontamination of arsenate polluted water.

关键词： arsenate adsorption mesoporous layered double hydroxide anion exchange

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婴幼儿肾移植疗效及预后分析

中华医学杂志 2023年第38期103卷 3010-3016页

作者：朱兰郭志良赵大强萨如拉赵光远张瑜仇丽茹周建华李伟杰郭晖沈芸妍李晓忠陈知水陈刚华中科技大学同济医学院附属同济医院器官移植研究所武汉430030 器官移植教育部重点实验室国家卫生健康委员会器官移植重点实验室中国医学科学院器官移植重点实验室武汉430030 华中科技大学同济医学院附属同济医院儿科武汉430030 华中科技大学同济医学院附属同济医院药学部武汉430030 苏州大学附属儿童医院肾脏免疫科苏州215000

目的分析婴幼儿肾移植的疗效及预后。方法回顾性收集华中科技大学同济医学院附属同济医院2017年6月1日至2022年7月31日实施的37例次3岁以内婴幼儿受者肾移植临床资料,初次肾移植31例次,二次肾移植6例次。中位随访18个月(6~66个月)。采用... 详细信息

目的分析婴幼儿肾移植的疗效及预后。方法回顾性收集华中科技大学同济医学院附属同济医院2017年6月1日至2022年7月31日实施的37例次3岁以内婴幼儿受者肾移植临床资料,初次肾移植31例次,二次肾移植6例次。中位随访18个月(6~66个月)。采用Kaplan-Meier法绘制移植肾及受者生存曲线,分析预后及并发症情况。结果受者男20例,女17例,中位年龄16个月(2个月26 d至36个月),中位体重8 kg(3.2~14.0 kg),最小仅2个月26 d,体重仅3.2 kg。受者原发病最多见为先天性肾病综合征(13例,41.9%)。19例次(51.3%)为腹腔内移植,余18例次(48.6%)为髂窝内移植。术后发生移植肾功能恢复延迟7例次(18.9%),血栓形成并导致移植肾失功5例(13.5%),其中4例接受二次肾移植并获得成功。在随访期间内,急性排斥反应11例(29.7%),巨细胞病毒肺炎6例(16.2%)。患儿移植后1年的估算肾小球滤过率高于术后1个月[(101.9±22.1)比(71.1±25.6)ml/(min·1.73m^(2)),P<0.001],并在术后2年时保持恒定。移植肾1年、2年存活率均为85.3%,移植受者1年、2年存活率均为96.8%。结论尽管婴幼儿肾移植实施难度较大,但还是能够取得相对满意疗效和预后。

关键词：肾移植儿童血栓形成排斥反应随访研究

HPV联合阴道镜检查对早期诊断宫颈癌癌前病变诊断效能的影响

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当代医学 2021年第15期27卷 144-145页

作者：郭芝亮易丹妮何耀娟季冰广州市妇女儿童医疗中心妇产科广东广州510000

目的分析HPV联合阴道镜检查对早期诊断宫颈癌癌前病变诊断效能的影响。方法选取本院2019年1月至2020年2月收治的100例疑似宫颈癌癌前病变患者作为研究对象,均使用HPV、阴道镜以及HPV联合阴道镜的方式进行检查,以病理检查结果为金标准,分... 详细信息

目的分析HPV联合阴道镜检查对早期诊断宫颈癌癌前病变诊断效能的影响。方法选取本院2019年1月至2020年2月收治的100例疑似宫颈癌癌前病变患者作为研究对象,均使用HPV、阴道镜以及HPV联合阴道镜的方式进行检查,以病理检查结果为金标准,分析3种检查方式的检查结果。结果病理检查结果显示,真阳性80例,真阴性20例;3种检查方式特异度、误诊率比较差异无统计学意义;联合检查灵敏度、诊断准确率均高于阴道镜和HPV检查,漏诊率低于阴道镜和HPV检查,差异均有统计学意义(P<0.05)。结论应用HPV与阴道镜联合对宫颈癌癌前病患者进行诊断,具有较高的诊断灵敏度与特异度,可有效提高诊断的准确率,降低误诊、漏诊等发生率,诊断应用价值较高,值得临床推广应用。

关键词： HPV 阴道镜检查宫颈癌癌前病变

Development of a Synchronization Method for Fluid-Thermal Study of Hypersonic Flow

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Transactions of Nanjing University of Aeronautics and Astronautics 2018年第6期35卷 973-985页

作者： ShenEnnan Lu zhiliang Zhou Di guo Tongqing College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics

A synchronization method is developed for the fluid-thermal study of hypersonic *** from conventional loosely/tightly coupled methods which separately deal with the flow field and the structure temperature field,the presented method expresses the governing equations in a unified framework so that the two fields can be calculated *** efficiently solving the unified equations,the finite volume method together with the dual-time stepping approach is *** in the flow field,the local time step is also used in the temperature field,which is determined from thermal conductivity spectral *** order to treat the fluid-structure interface more conveniently,an expanded virtual boundary is *** validation,several fluid-thermal hypersonic flow problems are *** computed results are compared with those obtained from the coupled methods and the *** the continuous heating problems,the stagnation temperatures predicted by both the coupled and synchronization methods are in good agreements with the experimental *** the unsteady flowthermal hypersonic flows,the stagnation heat fluxes predicted by the presented method and tightly coupled method are basically the same,which agree better with the experimental data than those predicted by the loosely coupled *** terms of prediction of the stagnation temperature,the synchronization method shows better accuracy than the tightly coupled method.

关键词： hypersonic flow aerothermal synchronization method expanded virtual boundary conductivity spectral radii

A Three-Dimensional Gas-Kinetic BGK Scheme for Simulating Flows in Rotating Machinery

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Advances in Applied Mathematics and Mechanics 2019年第1期11卷 168-196页

作者： Di Zhou zhiliang Lu Tongqing guo Department of Aerodynamics College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsQinhuai DistrictNanjing 210016JiangsuChina

This paper focuses on the development and application of a threedimensional gas-kinetic Bhatnagar-Gross-Krook(BGK)method for the viscous flows in rotating *** such flows,a rotating frame of reference is usually used in formulating the Navier-Stokes(N-S)equations,and there are two major concerns in constructing the corresponding BGK *** is the change of the convective velocities in the N-S equations,which can be reflected through modification of the gas streaming *** other one is the necessity to account for the effect of the additional Coriolis and centrifugal ***,a specifically-designed acceleration term is added into the modified Boltzmann equation so that the source effects can be naturally included into the gas evolution process and the resulted *** the finitevolume framework,the constructed BGK model is locally solved at each cell interface and then the numerical fluxes can be *** employing the BGK scheme,it is sometimes found that the calculated spatial derivatives of the initial and equilibrium distribution functions are sensitive to the mesh quality especially in complex rotating flow applications,which may significantly influence flux ***,an improved approach for computing these slopes is adopted,through which the modeling capability for viscous flows is *** validation,several numerical examples are *** computed results show that the present method can be well applied to a wide range of flows in rotating machinery with favorable accuracy.

关键词： Gas-kinetic scheme BGK model non-inertial reference frame acceleration term rotating machinery

Simulation of Viscous Flows Around A Moving Airfoil by Field Velocity Method with Viscous Flux Correction

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Advances in Applied Mathematics and Mechanics 2012年第3期4卷 294-310页

作者： Ning Gu zhiliang Lu Tongqing guo Department of Aerodynamics Nanjing University of Aeronautics and Astronautics29 Yudao StreetNanjing 210016China

Based on the field velocity method,a novel approach for simulating unsteady pitching and plunging motion of an airfoil is presented in this *** to pitching and plunging motions of the airfoil are simulated under different *** obtained results are compared with those of moving grid method and good agreement is *** the conventional field velocity method,the Euler solver is usually used to simulate the movement of the ***,when viscous effect is considered,unsteady Navier-Stokes equations have to be solved and the viscous flux correction must be taken into *** this work,the viscous flux correction is introduced into the conventional field velocity method when non-uniform grid speed distribution is *** experiments for the flow around NACA0012 airfoil showed that the proposed approach can well simulate viscous moving boundary flow problems.

关键词： Gust response unsteady Navier-Stokes equations field velocity method viscous flux correction