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工程总承包企业BIM能力对项目绩效的影响研究

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项目管理技术 2024年第4期22卷 98-105页

作者：刘月君高银飞张江波张亚东周创辉河北建筑工程学院河北张家口075000 河北省绿色建筑协同创新中心河北张家口075000 中建电子商务有限责任公司四川成都610000 中建八局第一建设有限公司山东济南250000

基于资源基础理论、动态能力理论和相关文献研究成果,构建工程总承包企业BIM能力对项目绩效影响模型。以BIM能力为自变量,以知识管理为中介变量,以项目绩效为因变量,研究三者间的影响机制,并探讨信任在其中的调节作用。通过调查问卷收... 详细信息

基于资源基础理论、动态能力理论和相关文献研究成果,构建工程总承包企业BIM能力对项目绩效影响模型。以BIM能力为自变量,以知识管理为中介变量,以项目绩效为因变量,研究三者间的影响机制,并探讨信任在其中的调节作用。通过调查问卷收集数据,运用结构方程模型进行实证分析。结果表明,BIM能力对项目绩效产生正向影响,BIM能力可以通过知识管理有效促进项目绩效,信任在该过程中具有调节作用。该研究结论有助于指导工程总承包企业识别和培育核心BIM能力,从而促进项目绩效。同时,为参与总承包模式的各方提出管理建议,旨在提升项目绩效管理水平。

关键词： BIM能力知识管理信任项目绩效

Theoretical advances of the structures and catalytic activities of small-sized gold nanoclusters

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Chinese Science Bulletin 2014年第3期59卷 239-246页

作者： yadong Li Yi gao Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied PhysicsChinese Academy of Sciences University of Chinese Academy of Sciences

Gold nanoclusters exhibit extraordinary catalytic activities,but the dominating factor is still unclear due to the complexity of the structures.In this review,we briefly summarized the recent theoretical progress on their structures and catalytic activities.Combining the experimental and theoretical efforts,the structures of small-sized gold clusters have been explored systematically.Based on the determined structures,factors that influence the catalytic capabilities of small-sized gold clusters(Au_(16)-Au_(35))are studied using CO oxidation asa probe.The preadsorption energies of CO and O_2are found strongly correlated with catalytic activities,which could be affected by the clusters'geometries,sizes,and charge distributions.In addition,the presence of water could significantly lower the activation energy barrier of O_2 dissociation to enhance the clusters'catalytic activities.

关键词：催化活性金团簇小尺寸结构 CO氧化催化能力几何形状电荷分布

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管道环焊缝的全聚焦检测

无损检测 2024年第4期46卷 59-63页

作者：薛岩高静李辉刘全利皮亚东吕新昱郭瑞杰中国石油天然气管道科学研究院有限公司廊坊065000 中国石油管道局工程有限公司维抢修分公司廊坊065000

全聚焦技术是一种基于全矩阵采集的虚拟聚焦图像后处理技术,全聚焦算法将成像区域分割为多个网格,对每一网格都进行聚焦,使得超声成像结果更加均匀平滑,成像质量优于常规相控阵超声检测方法的质量。根据全聚焦成像的技术特点开展管道环... 详细信息

全聚焦技术是一种基于全矩阵采集的虚拟聚焦图像后处理技术,全聚焦算法将成像区域分割为多个网格,对每一网格都进行聚焦,使得超声成像结果更加均匀平滑,成像质量优于常规相控阵超声检测方法的质量。根据全聚焦成像的技术特点开展管道环焊缝相控阵超声全聚焦检测工艺方案的研究,参照管道环焊缝试块设计标准设计并制作全聚焦验证试块,针对全聚焦验证试块、全自动超声检测(AUT)校准试块开展相控阵超声全聚焦检测试验。试验结果表明,对于V型坡口,全聚焦成像效果好;对于小角度的自动焊坡口,常规全聚焦检测时接收超声回波困难,存在检测灵敏度低的问题;通过对全聚焦算法的优化改进,提高了小角度缺陷的检出率,证明全自动焊焊缝可采用全聚焦技术进行检测。

关键词：环焊缝无损检测全聚焦

Regulatory variation within 3’UTR of STAT5A correlates with sudden cardiac death in Chinese populations

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Forensic Sciences Research 2022年第4期7卷 726-735页

作者： Huan Yu yadong Guo Zhenzhen Yang Qing Zhang Jiabin Xu Qi Yang Yiling Qu Rui Tan Lijuan Li Yan He Chengtao Li Suhua Zhang Bin Luo Yuzhen gao Department of Forensic Medicine Medical College of Soochow UniversitySuzhouChina Department of Forensic Science School of Basic Medical SciencesCentral South UniversityChangshaChina Public Security Bureau of Taixing TaizhouChina Department of Epidemiology Medical College of Soochow UniversitySuzhouChina Shanghai Key Laboratory of Forensic Medicine Academy of Forensic ScienceShanghaiChina Faculty of Forensic Medicine Zhongshan School of MedicineSun Yat-sen UniversityGuangzhouChina

Definitive diagnosis to sudden cardiac death(SCD)is often challenging since the postmortem examination on SCD victims could hardly demonstrate an adequate cause of death.It is therefore important to uncover the inherited risk component to SCD.Signal transducer and activators of transcription 5 A(STAT5A)is a member of the STAT family and a transcription factor that is activated by many cell ligands and associated with various cardiovascular processes.In this study,we performed a systematic variant screening on the STAT5A to filter potential functional genetic variations.Based on the screening results,an insertion/deletion polymorphism(rs3833144)in 3’UTR of STAT5A was selected as the candidate variant.A total of 159 SCD cases and 668 SCD matched healthy controls was enrolled to perform a case-control study and evaluate the association between rs3833144 and SCD susceptibility in Chinese populations.Logistic regression analysis showed that the deletion allele of rs3833144 had significantly increased the SCD risk(odds ratio(OR)=1.54;95%confidence interval(CI)=1.18-2.01;P=0.000955).Further genotype-expression eQTL analysis showed that samples with deletion allele appeared to lower expression of STAT5A,and in silico prediction suggested the local 3 D structure changes of STAT5A mRNA caused by the variant.On the other hand,the bioinformatic analysis presented that promoters of RARA and PTGES3L-AARSD1 could interact with rs3833144,and eQTL analysis showed the higher expression of both genes in samples with deletion allele.Dual-luciferase activity assays also suggested the significant regulatory role of rs3833144 in gene transcription.Our current data thus suggested a possible involvement of rs3833144 to SCD predisposition in Chinese populations and rs3833144 with potential function roles may become a candidate marker for SCD diagnosis and prevention.

关键词： Forensic sciences forensic genetics STAT5A 3’UTR rs3833144 sudden cardiac death indel polymorphism

Controlled manipulation of conductive ferroelectric domain walls and nanoscale domains in BiFeO_(3) thin films

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Journal of Materiomics 2022年第2期8卷 274-280页

作者： Dongfeng Zheng Guo Tian yadong Wang Wenda Yang Luyong Zhang Zoufei Chen Zhen Fan Deyang Chen Zhipeng Hou Xingsen gao Qiliang Li Jun-Ming Liu Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials and Institute for Advanced Materials South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006China Songshan Lake Materials Laboratory Dongguan Guangdong523808China Department of Electrical and Computer Engineering George Mason UniversityFairfaxVirginia22030USA Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures Nanjing UniversityNanjing210093China

Recently,there is a surge of research interest in configurable ferroelectric conductive domain walls which have been considered as possible fundamental building blocks for future electronic devices.In this work,by using piezoresponse force microscopy and conductive atomic force microscopy,we demonstrated the controlled manipulation of various conductive domain walls in epitaxial BiFeO_(3) thin films,e.***.neutral domain walls(NDW)and charged domain walls(CDWs).More interestingly,a specific type of nanoscale domains was also identified,which are surrounded by highly conductive circular CWDs.Similar nano-scale domains can also be controlled created and erasured by applying local field via conductive probe,which allow nondestructive current readout of different domain states with a large on/off resistance ratio up to 102.The results indicate the potential to design and develop high-density non-volatile ferroelectric memories by utilizing these programable conductive nanoscale domain walls.

关键词： BiFeO_(3)thin film Conductive domain wall Nanoscale domain High density memory

Molecular dynamics simulation of single crystal Nickel nanometric machining

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Science China(Technological Sciences) 2016年第6期59卷 867-875页

作者： ZHU Zong Xiao GONG yadong ZHOU Yun Guang gao Qi School of Mechanical Engineering & Automation Northeastern University

Molecular dynamics simulation is carried out to study the nanometric machining of single crystal Nickel(Ni). Through an investigation of atomic displacement and the variation of cutting force, it is found that the latter is in accordance with the number variation of elastic displaced atoms in the workpiece. It is further found that the generation of complex stacking faults is the predominant cause of cutting force fluctuation, and the stacking faults with complex structures lead to work-hardening. The temperature of the cutting tool and workpiece is studied during the machining process. It is concluded that the selection of averaging steps has a significant influence on the system temperature distribution. Thus, the time-spatial averaging method, which has a high accuracy and consistency in temperature distribution, is proposed.

关键词：分子动力学模拟加工过程纳米单晶温度分布镍堆垛层错空间平均

黑山共和国进境寄递邮件中“异宠”巴尔干锯螽斯的鉴定

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植物检疫 2024年第1期38卷 52-54页

作者：林宇刘娟贺艳姜一王娓辰高建王金成魏亚东天津海关天津300456

天津口岸从黑山共和国进境国际寄递物中截获一种可疑的昆虫卵,通过形态学特征、线粒体COI基因序列比对和系统进化分析,最终确定为巴尔干锯螽斯[Saga natoliae(Serville,1838)]。目前,巴尔干锯螽斯在我国国内尚未有发生和分布的报道,属... 详细信息

天津口岸从黑山共和国进境国际寄递物中截获一种可疑的昆虫卵,通过形态学特征、线粒体COI基因序列比对和系统进化分析,最终确定为巴尔干锯螽斯[Saga natoliae(Serville,1838)]。目前,巴尔干锯螽斯在我国国内尚未有发生和分布的报道,属于外来物种,此次为全国口岸首次截获该螽斯。

关键词：巴尔干锯螽斯进境寄递物线粒体COI基因鉴定

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过敏原免疫治疗在过敏性哮喘预防中的作用

中华预防医学杂志 2023年第9期57卷 1309-1315页

作者：梁慧玲高亚东武汉大学中南医院过敏反应科武汉430071 浙江大学医学院附属第一医院变态反应科杭州310003

过敏性哮喘的患病率呈增长趋势,影响患者生活质量、危及生命,带来巨大的社会和经济负担。过敏原免疫治疗(allergen immunotherapy,AIT)是唯一有可能改变“过敏进程”的对因治疗手段,目前已经广泛用于过敏性鼻炎、结膜炎的治疗,在过敏性... 详细信息

过敏性哮喘的患病率呈增长趋势,影响患者生活质量、危及生命,带来巨大的社会和经济负担。过敏原免疫治疗(allergen immunotherapy,AIT)是唯一有可能改变“过敏进程”的对因治疗手段,目前已经广泛用于过敏性鼻炎、结膜炎的治疗,在过敏性哮喘治疗中的作用和地位也逐渐获得认可。有研究显示,AIT可能对过敏性哮喘的发生发展具有一定的预防作用。本文对过敏性哮喘三级预防概念进行阐述,并就AIT在过敏性哮喘三级预防中的具体作用进行归纳分析,为过敏性哮喘的防控提供参考。

关键词：过敏原免疫治疗过敏性哮喘预防

Clinical and functional comparison of dynamic hip screws and intramedullary nails for treating proximal femur metastases in older individuals

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Chinese Journal of Cancer Research 2020年第3期32卷 395-402页

作者： Hua gao Xiaodong Bai Wentao Chen yadong Li Liang Zhao Changgui Liu Zhenyu Liu Baojun Wang Department of Orthopaedics Beijing Friendship HospitalCapital Medical UniversityBeijing 100050China

Objective:To compare the outcomes of dynamic hip screws(DHS)and intramedullary nailing(IMN)in the treatment of extra-capsular metastatic carcinoma of the proximal femur.Methods:A retrospective case analysis method was used to examine data of patients with proximal metastatic cancer of the femur who were treated with internal fixation in Department of Orthopaedics,Beijing Friendship Hospital,from January 2007 to December 2018.Blood loss,postoperative pain,functional score,length of stay,and survival rates were compared,and postoperative complications were assessed.Results:Complete follow-up data were available for 33 patients.The mean follow-up period was 12.2±3.6(range:9-32)months and the average age was 72.3±4.7(range:59-83)years old.There were 20 females and 13 males.Twenty-three patients had undergone IMN and 10 DHS,according to bone defects and the patient’s overall condition.The median survival time was 10 months in the IMN group and 11 months in the DHS group.Duration of surgery(t=-7.366,P<0.001)and length of hospital stay(t=-3.509,P<0.001)differed significantly between the two groups.There was one case of breakage of internal fixation in the IMN group.Conclusions:There was no significant difference between DHS and IMN in terms of surgical efficacy.IMN and DHS were different in terms of surgical time and hospital stay.However,due to the limited number of cases in this study,multi-factor analysis has not been performed and needs to be further verified in future analysis.When developing a surgical plan,it is recommended to consider the patient’s condition and the surgeon’s experience.

关键词： Proximal femur bone metastatic cancer dynamic hip screw(DHS) intramedullary nail(IMN) bone cements