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基于有限体积法及FDS格式的感潮河段二维泥沙冲淤模型

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水动力学研究与进展（A辑） 2004年第1期19卷 98-103页

作者：赵棣华沈福新颜志俊卢恭和南京水利科学研究院江苏南京210029 福建水利勘测设计院福州350001

　本文以木兰溪下游裁弯河段为例,建立了有限体积法的水平二维非恒定流均匀沙不平衡输移计算模型。采用黎曼近似解通量差分裂(FDS)格式计算通过各单元边的水流、含沙量法向数值通量,并应用相关的悬移质、推移质河床变形计算公式计算冲... 详细信息

　本文以木兰溪下游裁弯河段为例,建立了有限体积法的水平二维非恒定流均匀沙不平衡输移计算模型。采用黎曼近似解通量差分裂(FDS)格式计算通过各单元边的水流、含沙量法向数值通量,并应用相关的悬移质、推移质河床变形计算公式计算冲淤变化。数值模型经相应的河工模型试验资料率定、检验后,预测了裁弯工程建成后河道可能的冲淤变化,为工程设计和施工提供依据。

关键词：有限体积法黎曼近似解浅水方程无结构网格悬移质推移质含沙量河床变形

Study on the Correlation of Survival State and Mental Health of Knowledge-type Employee

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Study on the Correlation of Survival State and Mental Health...

椎管重建内固定术有限元模型的构建及稳定性分析

2010 Second International Asia Symposium on Intelligent Interaction and Affective Computing and 2010 Second International Conference on Innovation Management (ASIA-ICIM 2010)

作者： jianming Zhao Business School Hohai University nanjing jiangsu Province china jian hua Business School Hohai University nanjing jiangsu Province china

This paper first gives the connotation of living status and the significance of doing such *** it analyses the sources of knowledge-type employees’ survival pressure,and discusses the relationship between survival state and mental ***,it gives some ssuggestions on dealing with survival pressure and adjusting psychology *** wish it is useful to provide psychological help to alleviate survival pressure to knowledge-type employees.

关键词： Survival State Mental Health Knowledge-type Employee

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中国骨伤 2024年第3期37卷 271-277页

作者：陈建民刘国印黄伟谦练仲华张二来赵建宁南京医科大学金陵临床医学院骨科江苏南京210002 厦门医疗器械研发检测中心有限公司福建厦门361027

目的:构建椎管重建内固定术的有限元模型,并分析椎管重建内固定术对脊柱稳定性的影响,验证椎管重建内固定术在椎管内手术中的有效性和可靠性。方法:筛选1名30岁男性,身高172 cm,体重75 kg的健康志愿者并采集其腰椎CT资料,建立正常腰椎L3... 详细信息

目的:构建椎管重建内固定术的有限元模型,并分析椎管重建内固定术对脊柱稳定性的影响,验证椎管重建内固定术在椎管内手术中的有效性和可靠性。方法:筛选1名30岁男性,身高172 cm,体重75 kg的健康志愿者并采集其腰椎CT资料,建立正常腰椎L3-L5的有限元模型,并与体外实体结果和已发表的有限元分析结果进行比较,以验证该模型的有效性。根据处理方式不同分为正常组、椎板切除组和椎管重建组。在相同边界固定和生理载荷条件下,实施前屈、后伸、左弯、右弯、左旋和右旋6种工况活动,分析6种工况活动下L3-L4和L4-L5观察节段的活动度(range of motion,ROM)和L3-L5整体最大ROM的变化情况。结果:构建的L3-L5有限元模型各节段ROM位移与体外实体结果和既往文献数据结果吻合,确认了该模型的有效性。在L3-L4中,椎管重建组仅在后伸时较正常组增加,ROM变化百分比>5%;其他工况下的ROM与正常组相近,变化百分比5%。在L4-L5中,椎管重建组,在各工况下的ROM与正常组相近,变化百分比5%。在L3-L5的整体最大ROM中,椎管重建组仅在后伸时超过正常组,变化百分比>5%;而椎板切除在前屈、后伸、左旋和右旋时大于正常组和椎管重建组,变化百分比>5%。L3-L5各节段ROM及总体ROM的变化趋势为:椎板切除组>椎管重建组>正常组。结论:椎板切除会严重影响脊柱生物力学的稳定性,而应用椎管重建内固定的方式可有效减少脊柱责任节段的ROM位移并维持其生物力学稳定性。

关键词：椎板切除椎管重建钢板内固定有限元分析稳定性活动度

杭州市钱塘新区地下空间开发地质环境适宜性评价

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地质与勘探 2024年第1期60卷 20-32页

作者：马青山葛伟亚邢怀学蒋杰华健康从轩中国地质调查局南京地质调查中心江苏南京210016 中国地质科学院北京100037

地下空间地质环境适宜性评价是实现地下空间合理有序开发的重要环节,也是国土空间科学规划的必要前提。通过系统分析杭州市钱塘新区地质环境条件,从地形地貌、工程地质条件、水文地质条件、活动断裂及地震效应、环境地质问题等五个方面... 详细信息

地下空间地质环境适宜性评价是实现地下空间合理有序开发的重要环节,也是国土空间科学规划的必要前提。通过系统分析杭州市钱塘新区地质环境条件,从地形地貌、工程地质条件、水文地质条件、活动断裂及地震效应、环境地质问题等五个方面选取15个指标构建了地下空间开发地质环境适宜性评价指标体系。在此基础上,采用变权层次分析法和灰色关联分析模型,对浅层(0~15m)、次浅层(15~30m)、次深层(30~50m)地下空间进行了开发利用地质环境条件适宜性评价。结果表明,研究区浅层和次深层地下空间更适宜开发,而次浅层地下空间适宜性好和适宜性较好的总面积仅占全区的45.7%,地质环境条件复杂,具有一定的开发难度。该结果可为钱塘新区地下空间合理开发提供参考。

关键词：地下空间开发地质环境适宜性变权分析法灰色关联分析法钱塘新区

Pathotypes and Genetic Diversity of Blumeria graminis *** in the Winter Barley Regions in china

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Agricultural Sciences in china 2010年第12期9卷 1787-1798页

作者： ZHU Jing-huan WANG Jun-mei JIA Qiao-jun yang jian-ming ZHOU Yi-jun LIN Feng hua Wei SHANG Yi College of Plant Protection Nanjing Agricultural University Nanjing 210095 P.R.China National Barley Improvement Center Zhejiang Academy of Agricultural Sciences Hangzhou 310021 P.R. China institute of Plant Protection Jiangsu Academy of Agricultural Sciences Nanjing 210014 P.R. China

Barley powdery mildew caused by Blumeria graminis f. sp. hordei （Bgh） is one of the most destructive foliar diseases of barley in the winter barley region of china. The evaluation and assessment of the virulence and diversity of Bgh populations help to determine effective sources of resistance to the pathogen. 515 isolates were collected from seven populations of Bgh on cultivated barley in seven geographically distant locations in 2006. Their virulence was determined by inoculation onto 26 differential host lines. All of the isolates belonged to 58 pathotypes and 13 of which included 81% of these isolates. The most abundant pathotype was pathotype 0047 （18.3%）, the second most abundant was pathotype 0045 （11.8%） and the third most abundant was pathotype 0057 （7.8%）. Most of virulent genes investigated in this study showed similar frequencies in the seven different areas. These indicate that the seven locations may be in a uniform epidemiological region and barley cultivars in these areas may have similar genetic background. Diversities within these populations and distances between these populations measured by KOIND package were different. Correlations were not found between the genetic distance and the geographical distances between different locations. This suggested that long distance spread and local epidemics existed in the major winter barley growing regions in china.

关键词： Blumeria graminis f. sp. hordei powdery mildew pathotype virulence frequency diversity barley china

Conformational Properties of Comb-shaped Polyelectrolytes with Negatively Charged Backbone and Neutral Side Chains Studied by a Generic Coarse-grained Bead-and-Spring Model

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Chinese Journal of Polymer Science 2020年第4期38卷 371-381,I0007页

作者： jian-hua Chen Li-Qun Lu Hong-Xia Zhao Yong yang Xin Shu Qian-Ping Ran State Key Laboratory of High Performance Civil Engineering Materials Nanjing 210008China jiangsu Sobute New Materials Co. Ltd.Nanjing 211103China School of Material Science and Engineering Southeast UniversityNanjing 211189China

A generic coarse-grained bead-and-spring model,mapped onto comb-shaped polycarboxylate-based(PCE)superplasticizers,is developed and studied by Langevin molecular dynamics simulations with implicit solvent and explicit *** agreement on the radius of gyration of the PCEs with experiments shows that our model can be useful in studying the equilibrium sizes of PCEs in *** effects of ionic strength,side-chain number,and side-chain length on the conformational behavior of PCEs in solution are ***-chain equilibrium properties,including the radius of gyration,end-to-end distance and persistenee length of the polymer backbone,shape-asphericity parameter,and the mean span dimension,are *** is found that with the increase of ionic strength,the equilibrium sizes of the polymers decrease only slightly,and a linear dependenew of the persistence length of backbone on the Debye screening length is found,in good agreement with the theory developed by *** side-chain numbers and/or side-chain lengths increases not only the equilibrium sizes(radius of gyration and mean span)of the polymer as a whole,but also the persistence length of the backbone due to excluded volume interactions.

关键词： Comb-shaped polyelectrolyte Molecular dynamics simulatio ns Coarse-grained model Polymer con formations Persiste nee length

Application of a 3D-printed ”fistula stent” in plugging enteroatmospheric fistula with open abdomen: A case report

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World Journal of Gastroenterology 2019年第14期25卷 1775-1782页

作者： Zi-Yan Xu hua-jian Ren Jin-jian huang Zong-An Li jian-An Ren research institute of General Surgery Jinling Hospital School of Medicine Nanjing University NARI School of Electrical and Automation Engineering Nanjing Normal University

BACKGROUND Open abdomen(OA) has been generally accepted for its magnificent superiority and effectiveness in patients with severe trauma, severe intra-abdominal infection, and abdominal compartment syndrome. In the meantime, OA calls for a mass of nursing and the subsequent enteroatomospheric fistula(EAF), which is one of the most common complications of OA therapy, remains a thorny *** SUMMARY Our team applied thermoplastic polyurethane as a befitting material for producing a 3 D-printed "fistula stent" in the management of an EAF patient,who was initially admitted to local hospital because of abdominal pain and distension and diagnosed with bowel obstruction. After a series of operations and OA therapy, the patient developed an *** Application of this novel "fistula stent" resulted in a drastic reduction in the amount of lost enteric effluent and greatly accelerated rehabilitation processes.

关键词： 3D printing Enteroatmospheric fistula Open abdomen Isolation technique Case report

激光陀螺捷联惯性导航系统中惯性器件误差补偿技术

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上海交通大学学报 2003年第11期37卷 1795-1799页

作者：熊智刘建业林雪原曾庆化南京航空航天大学导航研究中心南京210016

为了提高激光捷联惯性导航系统的导航精度,对惯性器件误差进行了原理上的分析和说明,并针对由国内某型激光陀螺构成的惯性测量器件进行了误差分析.在此基础上建立了误差补偿的精确数学模型,提出了一种简易的且具有较高精度的误差模型参... 详细信息

为了提高激光捷联惯性导航系统的导航精度,对惯性器件误差进行了原理上的分析和说明,并针对由国内某型激光陀螺构成的惯性测量器件进行了误差分析.在此基础上建立了误差补偿的精确数学模型,提出了一种简易的且具有较高精度的误差模型参数静态标定方法,给出了计算误差模型参数的数学推导过程和解析表达式.分析结果表明,惯导系统误差主要由惯性器件测量误差引起,为了有效补偿惯导系统的系统误差,必须针对具体的惯性器件进行误差补偿.实际测试结果证明,该计算方法精度较高,可以有效提高惯导精度.

关键词：误差补偿静态标定激光陀螺捷联惯性

基于AT89C51单片机的喷射混凝土厚度无损检测仪

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无损检测 2002年第11期24卷 467-468,487页

作者：孙汝建南京水利科学研究院土工研究所南京210024

介绍AT89C5 1单片机在喷射混凝土厚度仪中的应用。叙述中子法测量喷射混凝土厚度的简单原理、仪器系统构成。

关键词：单片机喷射混凝土无损检测仪厚度测量