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基于MRI的椎体骨质量评分及其临床应用进展

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中国脊柱脊髓杂志 2024年第6期34卷 636-640页

作者：葛晓勇陈灏张树宝徐浩伟王善金同济大学附属东方医院脊柱外科上海市200120

骨质疏松症是一种全身性骨代谢疾病,与多种不良预后有关,其发病率正逐年上升[1]。目前国内对骨密度评估的金标准是基于双能X线吸收测量法(dual-energy X-ray absorptiometry,DXA)测量的结果,但DXA易受腰椎退变的影响,从而低估骨量异常... 详细信息

骨质疏松症是一种全身性骨代谢疾病,与多种不良预后有关,其发病率正逐年上升[1]。目前国内对骨密度评估的金标准是基于双能X线吸收测量法(dual-energy X-ray absorptiometry,DXA)测量的结果,但DXA易受腰椎退变的影响,从而低估骨量异常的风险。

关键词：腰椎退变临床应用进展双能X线吸收测量法骨质疏松症 DXA 骨密度椎体骨质不良预后

Temporal and spatial responses of ecological resilience to climate change and human activities in the economic belt on the northern slope of the Tianshan Mountains, China

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干旱区科学:英文版 2023年第10期15卷 1245-1268页

作者： zhang shubao LEI Jun TONG Yanjun zhang Xiaolei LU Danni FAN Liqin DUAN Zuliang State Key Laboratory of Desert and Oasis Ecology/Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China

In the Anthropocene era,human activities have become increasingly complex and *** natural ecosystems need higher ecological resilience to ensure regional sustainable development due to rapid urbanization and industrialization as well as other intensified human activities,especially in arid and semi-arid *** the study,we chose the economic belt on the northern slope of the Tianshan Mountains(EBNSTM)in Xinjiang Uygur Autonomous Region of China as a case *** collecting geographic data and statistical data from 2010 and 2020,we constructed an ecological resilience assessment model based on the ecosystem habitat quality(EHQ),ecosystem landscape stability(ELS),and ecosystem service value(ESV).Further,we analyzed the temporal and spatial variation characteristics of ecological resilience in the EBNSTM from 2010 to 2020 by spatial autocorrelation analysis,and explored its responses to climate change and human activities using the geographically weighted regression(GWR)*** results showed that the ecological resilience of the EBNSTM was at a low level and increased from 0.2732 to 0.2773 during 2010–*** spatial autocorrelation analysis of ecological resilience exhibited a spatial heterogeneity characteristic of"high in the western region and low in the eastern region",and the spatial clustering trend was enhanced during the study ***,Gobi and rapidly urbanized areas showed low level of ecological resilience,and oasis and mountain areas exhibited high level of ecological *** factors had an important impact on ecological ***,average annual temperature and annual precipitation were the key climate factors that improved ecological resilience,while average annual evapotranspiration was the main factor that blocked ecological *** the human activity factors,the distance from the main road showed a negative correlation with ecological *** night light index and PM2.5 concentration wer

关键词： ecological resilience ecosystem habitat quality ecosystem landscape stability ecosystem service value spatial autocorrelation analysis geographically weighted regression model economic belt on the northern slope of the Tianshan Mountains

基于物联网技术的道路施工过程质量管理研究——以彰武高速公路南靖段工程为例

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项目管理技术 2024年第4期22卷 5-11页

作者：张淑宝朱武荣陈健灵汪卫东杨德钊漳州通平漳武高速公路有限公司福建漳州363606 福建省高速公路技术咨询有限公司福建福州350001 湖南致同工程科技有限公司湖南长沙410000

为了综合考虑道路施工过程中的多环节影响因素,提高施工效率,缩短施工周期,提出基于物联网技术的道路施工过程质量管理方法。首先,利用基于物联网技术的智慧试验检测管理平台下的沥青路面施工质量管控系统采集施工路段摊铺测厚数据、智... 详细信息

为了综合考虑道路施工过程中的多环节影响因素,提高施工效率,缩短施工周期,提出基于物联网技术的道路施工过程质量管理方法。首先,利用基于物联网技术的智慧试验检测管理平台下的沥青路面施工质量管控系统采集施工路段摊铺测厚数据、智能压实监控数据、台账数据,以压实度、平整度、厚度、路面渗水率为评价指标;其次,构建深度神经网络模型,用于实现从多测量参数到评价指标的回归分析,通过多次训练得到最优指标预测模型;最后,根据模型参数实现不同层级的权重分析和输入/输出测量参数的重要度分析。以彰武高速公路南靖段工程为例进行数据验证,结果表明:基于物联网技术的道路施工过程质量管理方法能够在充分采集施工数据的基础上构建准确的回归分析模型,用于不同评价指标的预测,并基于模型权重实现对输出结果的一键溯源,有效提升施工过程质量智能化管理水平。

关键词：物联网技术道路施工质量管理深度神经网络指标预测

椎体CT值在骨质疏松性椎体骨折中的应用研究进展

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脊柱外科杂志 2024年第1期22卷 59-64页

作者：张树宝葛晓勇陈灏房心月王善金同济大学附属东方医院脊柱外科上海200120

骨质疏松性椎体骨折(OVF)约占全部骨折的50%[1]。初发椎体骨折可称为哨兵骨折,是骨质量严重下降的标志,患者初发椎体骨折后再骨折的发生率为27.4%~38.0%[2-3]。椎体再骨折不仅增加了骨质疏松症患者的致残率和死亡风险[4],还给家庭和社... 详细信息

骨质疏松性椎体骨折(OVF)约占全部骨折的50%[1]。初发椎体骨折可称为哨兵骨折,是骨质量严重下降的标志,患者初发椎体骨折后再骨折的发生率为27.4%~38.0%[2-3]。椎体再骨折不仅增加了骨质疏松症患者的致残率和死亡风险[4],还给家庭和社会带来了巨大的经济负担。骨密度(BMD)下降是OVF及椎体再骨折发生的独立危险因素[5-6]。BMD评估在OVF的预防和诊疗中具有重要意义。目前最常用的BMD测量技术包括双能X线吸收法(DXA)和定量CT扫描技术(QCT),DXA易受脊柱退行性变的影响而不够精确,QCT易受设备及软件的限制而无法普及。

关键词：胸椎腰椎脊柱骨折骨质疏松图像处理计算机辅助综述文献

Evolution of economic linkage network of the cities and counties on the northern slope of the Tianshan Mountains,China

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Regional Sustainability 2023年第2期4卷 173-184页

作者： YANG Zeyu zhang shubao LEI Jun zhang Xiaolei TONG Yanjun DUAN Zuliang FAN Liqin State Key Laboratory of Desert and Oasis Ecology Key Laboratory of Ecological Safety and Sustainable Development in Arid LandsXinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi830011China College of Resources and Environment University of Chinese Academy of SciencesBeijing100049China Institute of Geology and Geophysics Chinese Academy of SciencesBeijing100029China

The exchanges between cities and counties in the northern slope economic belt of Tianshan Mountains(NSEBTM)are increasingly frequent and the economic linkages are increasingly close,but the spatial distribution of economic development and linkages among the cities and counties within NSEBTM is ***,it is of great significance to study the evolution of spatial-temporal pattern of the economic linkage network of cities and counties on NSEBTM to promote the coordinated and integrated development of the regional economy on *** this study,we used the modified gravity model and social network analysis method to analyze the spatio-temporal evolution characteristics of the economic linkage network structure of cities and counties on NSEBTM in 2000,2010,and *** results showed that the comprehensive development quality level of cities and counties on NSEBTM increased from 2000 to 2020,its growth rate also increased,and its gap between cities and counties continued *** the spatial distribution patterns of the comprehensive development quality level of cities and counties on NSEBTM in 2000 and 2010 were presented as“high in the middle and low at both ends”,while the spatial distribution pattern of 2020 was exhibited as“high value and low value staggered”.The total amount of external economic linkages of cities and counties on NSEBTM showed an obvious upward trend,and its gap between cities and counties continued expanding,presenting a pattern of“a strong middle section and weak ends”.The direction of economic linkages of NSEBTM existed obvious central orientation and geographical *** density of economic linkage network of NSEBTM increased from 2000 to 2020,and the structure of economic linkage network changed from single-core structure centered with Urumqi City to multicore structure centered with Urumqi City,Karamay City,Shihezi City,and Changji City,shifting from unbalanced development to balanced *** the future,we should

关键词： Entropy method Economic linkages Gravity model Network structure Social network analysis Northern slope economic belt of Tianshan Mountains China

Clinicopathological Characteristics as Predictive Factrs for Lymph Node Metastasis in Submucosal Gastric Cancer

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Chinese Journal of Clinical Oncology 2007年第4期4卷 237-240页

作者： Caigang Liu Ping Lu Yang Lu Lua Li Ruishan zhang Huimian Xu shubao Wang Junqing Chen Department of Oncology First Affiliated Hospital of China Medial University Shenyang 110001. China.

OBJECTIVE To identify clinicopathological characteristics as predictive factors for lymph node metastasis in submucosal gastric cancer, and in addi- tion to establish objective criteria as indications for endoscopic submucosal dissection (ESD). METHODS Data from 130 patients with submucosal gastric cancer were collected, and the relationship between their clinicopathological characteris- tics and the presence of lymph node metastasis was retrospectively analyzed by multivariate analysis. RESULTS In the multivariate logistic regression model, a tumor size of 2 cm or more and an undifferentiated histologic type were found to be inde- pendent risk clinicopathological characteristics for lymph node metastasis. Among 130 patients with submucosal carcinoma, no lymph node metastases were observed in 17 patients who showed neither of the two risk clinicopath- ological characteristics. Lymph node metastasis occurred in 61.1% (22/36) of the patients who had both risk clinicopathological characteristics. CONCLUSION A tumor size of 2 cm or more and an undifferentiated histologic type were significantly and independently related to lymph node metastasis in submucosal gastric cancer. It is rational for the paitients with neither of these two independent risk clinicopathological characteristics to undergo an ESD.

关键词： early gastric cancer lymph node metastasis clinicopathological characteristics endoscopic mucosal resection.

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一种中央分隔带分离式改进混凝土护栏的研究

重庆交通大学学报（自然科学版） 2021年第7期40卷 107-111页

作者：张淑宝漳州厦蓉高速扩建工程有限公司福建漳州363000

路面加铺导致中央分隔带分离式混凝土护栏高度不足时,需要加高护栏,以提升护栏的防护性能。提出了一种在混凝土护栏上安装钢构件的改进混凝土护栏;采用小轿车、大型客车及大型货车3种车型进行了仿真碰撞分析及实车碰撞试验,研究了小轿... 详细信息

路面加铺导致中央分隔带分离式混凝土护栏高度不足时,需要加高护栏,以提升护栏的防护性能。提出了一种在混凝土护栏上安装钢构件的改进混凝土护栏;采用小轿车、大型客车及大型货车3种车型进行了仿真碰撞分析及实车碰撞试验,研究了小轿车碰撞后乘员加速度a、车辆重心高度H G的变化及大型客/货车碰撞后改进混凝土护栏支撑梁和横梁变形情况。结果表明:小轿车碰撞后,车辆乘员加速度的纵向和横向分量均不大于200 m/s 2;大型客/货车碰撞后,改进混凝土护栏的支撑梁和横梁变形出现了部分损坏,车辆能正常导出;改进混凝土护栏的防护等级可达到SAm级。

关键词：道路工程分离式混凝土护栏碰撞

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各向异性导电胶蠕变—恢复力学行为研究

机械强度 2009年第6期31卷 910-913页

作者：张树宝陈旭高丽兰天津大学化工学院天津300072 天津理工大学机械工程学院天津300191

对固化后的各向异性导电胶膜,利用动态力学分析仪分别在不同温度和应力下进行拉伸蠕变—恢复实验。实验发现,提高加载应力水平和升高实验温度均起到加速蠕变和加速恢复的作用;加载和卸载瞬时产生的应变跳跃值随应力和温度的增加而增大,... 详细信息

对固化后的各向异性导电胶膜,利用动态力学分析仪分别在不同温度和应力下进行拉伸蠕变—恢复实验。实验发现,提高加载应力水平和升高实验温度均起到加速蠕变和加速恢复的作用;加载和卸载瞬时产生的应变跳跃值随应力和温度的增加而增大,且与应力增量呈线性关系。本研究为建立本构模型以及利用有限元软件进行模拟计算提供数据支持。

关键词：各向异性导电胶膜蠕变-恢复力学性能

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C25喷射型陶砂混凝土的性能分析

路基工程 2018年第5期 149-153页

作者：张淑宝漳州厦蓉高速扩建工程有限公司福建漳州363000

针对陶砂具有轻质、保温隔热、耐久性能好等优点,通过大量室内试验对不同陶砂掺量条件下C25号陶砂混凝土的力学性能、传热性能和收缩性能进行分析。结果表明:陶砂掺量对于陶砂混凝土的抗压强度影响不大,能满足C25喷射混凝土的强度要求... 详细信息

针对陶砂具有轻质、保温隔热、耐久性能好等优点,通过大量室内试验对不同陶砂掺量条件下C25号陶砂混凝土的力学性能、传热性能和收缩性能进行分析。结果表明:陶砂掺量对于陶砂混凝土的抗压强度影响不大,能满足C25喷射混凝土的强度要求。陶砂混凝土的导热系数随着陶砂掺量的增加呈现减小趋势,陶砂掺量越大,其保温性能越好。0%陶砂掺量混凝土的干缩与热膨胀系数均最大,陶砂掺量为10%和30%的混凝土次之,而陶砂掺量为20%的混凝土干缩与热膨胀系数最小。说明陶砂能够在一定程度上改善混凝土的温缩与干缩性能,且陶砂掺量为20%时收缩最小。

关键词：陶砂混凝土性能膨胀系数干缩