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基于振动台缩尺模型的复杂体型建筑结构楼面加速度反应分布研究

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地震工程与工程振动 2024年第2期44卷 10-18页

作者：吴治邦樊圆任祥香程春兰卢文胜同济大学土木工程防灾国家重点实验室上海200092

楼面加速度放大系数(floor acceleration amplification,FAA)能够反映结构对地面加速度的放大,而当前的规范与研究多是依赖于历史楼面记录或者有限元分析结果,在涉及复杂体型建筑结构时计算分析和实际震害结果往往存在较大差异。以整体... 详细信息

楼面加速度放大系数(floor acceleration amplification,FAA)能够反映结构对地面加速度的放大,而当前的规范与研究多是依赖于历史楼面记录或者有限元分析结果,在涉及复杂体型建筑结构时计算分析和实际震害结果往往存在较大差异。以整体结构缩尺模型振动台试验记录数据为基础,通过拟合分析得到各条记录下原型结构沿高度的FAA分布。基于类拟地震反应谱形状模型,得到具有一定保证率的FAA分布曲面,针对不同结构类型分别提出了相应的计算公式,相比于规范能够更好地反映出复杂体型建筑结构的FAA分布特征。定性地探索了场地卓越周期变化对该类型建筑结构FAA分布特征的影响。

关键词：加速度反应分布曲面保证率整体结构缩尺模型

Enhancing the aromatic selectivity of cyclohexane aromatization by CO_(2)coupling

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Frontiers of Chemical Science and Engineering 2023年第11期17卷 1801-1808页

作者： xiangxiang ren Zhong-Pan Hu Jingfeng Han Yingxu Wei Zhongmin Liu National Engineering Research Center of Lower-Carbon Catalysis Technology Dalian National Laboratory for Clean EnergyiChEM(Collaborative Innovation Center of Chemistry for Energy Materials)Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Improving the aromatic selectivity in the alkane aromatization process is of great importance for its practical utilization but challenge to make because the high H/C ratio of alkanes would lead to a serious hydrogen transfer process and a large amount of light ***,CO_(2)is introduced into the cyclohexane conversion process on the HZSM-5 zeolite,which can improve the aromatic *** optimizing the reaction conditions,an improved aromatic(benzene,toluene,xylene,and C9+)selectivity of 48.2%can be obtained at the conditions of 2.7 MPa(CO_(2)),450℃,and 1.7 h^(−1),which is better than that without CO_(2)(aromatic selectivity=43.2%).In situ transmission Fourier transform infrared spectroscopy spectra illustrate that many oxygenated chemical intermediates(e.g.,carboxylic acid,anhydride,unsaturated aldehydes/ketones or ketene)would be formed during the cyclohexane conversion process in the presence of CO_(2).13C isotope labeling experimental results demonstrate that CO_(2)can enter into the aromatics through the formation of oxygenated chemical intermediates and thereby improve the aromatic *** study may open a green,economic,and promising way to improve the aromatic selectivity for alkane aromatization process.

关键词： aromatics carbon dioxide aromatization coupling reaction ZSM-5 zeolite

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恶性单纯性汗腺棘皮瘤1例

皮肤科学通报 2024年第4期41卷 450-452页

作者：张萌任项项刘领云杨帆河北大学附属医院皮肤科河北大学附属医院普通外科河北大学附属医院病理科

患者女，64岁，右腰部肿物20余年，近5年逐渐增大。皮肤科情况：右腰部单发红褐色增生性斑块，面积约3.5cm×4.0cm,边缘不规则、表面粗糙，可见红褐色痂皮。皮损组织病理示：角化过度，棘层不规则增生肥厚，肿瘤细胞呈长方形或卵圆形，... 详细信息

患者女，64岁，右腰部肿物20余年，近5年逐渐增大。皮肤科情况：右腰部单发红褐色增生性斑块，面积约3.5cm×4.0cm,边缘不规则、表面粗糙，可见红褐色痂皮。皮损组织病理示：角化过度，棘层不规则增生肥厚，肿瘤细胞呈长方形或卵圆形，胞浆呈苍白嗜酸性，核空泡，核仁小，不典型有丝分裂；肿瘤细胞大部分位于表皮内，未见肿瘤浸润。诊断：恶性单纯性汗腺棘皮瘤。治疗：予以局部扩大切除。术后随访15个月未见局部复发及周身淋巴结转移。

关键词：恶性单纯性汗腺棘皮瘤手术切除

Induction of seed germination in Orobanche *** extracts of traditional Chinese medicinal herbs

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Science China(Life Sciences) 2012年第3期55卷 250-260页

作者： MA YongQing ZHANG Wei DONG ShuQi ren xiangxiang AN Yu LANG Ming College of Resources and Environment Northwest A&F UniversityYangling 712100China State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationNorthwest A&F UniversityYangling 712100China College of Forestry Northwest A&F UniversityYangling 712100China

The co-evolution of Orobanche *** their hosts within the same environment has resulted in a high degree of adaptation and effective parasitism whereby the host releases parasite germination stimulants,which are likely to be unstable in the *** objective was to investigate whether extracts from non-host plants,specifically,Chinese medicinal plants,could stimulate germination of Orobanche *** of 606 Chinese medicinal herb species were extracted with deionized water and *** extracts were used to induce germination of three Orobanche species;Orobanche minor,Orobanche cumana,and Orobanche *** exhibited a wide range of germination responses to the various herbal *** and *** exhibited an intermediate germination response to the herbal ***,which has a narrow host spectrum,showed higher germination rates in response to different herbal extracts compared with those of *** and ***,which have a broader host *** extracts of many Chinese herbal species effectively stimulated seed germination among the Orobanche spp.,even though they were not the typical *** effective herbs represent interesting examples of potential trap *** countries can also screen extracts from indigenous herbaceous plants for their ability to induce germination of Orobanche *** use of such species as trap plants could diminish the global soil seed bank of Orobanche.

关键词： Orobanche spp. methanolic extracts deionized water extracts germination Chinese medicinal plants

Silk Fibroin/Poly-L-lactide Lactone Bi-layered Membranes for Guided Bone Regeneration

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Journal of Donghua University(English Edition) 2019年第6期36卷 564-572页

作者： WANG Linbo ren xiangxiang JIANG Ziyi MENG Kai ZHAO Huijing National Engineering Laboratory for Modern Silk College of Textile and Clothing EngineeringSoochow UniversitySuzhou 215123China Nantong Textile&Silk Industrial Technology Research Institute Nantong 226001China

After removal of the caries or diseased teeth,the alveolar ridge will undergo absorption and *** the amount of alveolar bone is insufficient,it will cause an inability to perform effective dental implant *** order to control the absorption and promote the repair and regeneration of alveolar ridge,a method of implanting guided bone regeneration(GBR)membranes at the extraction site is often *** this study,silk fibroin(SF)and poly-L-lactide lactone(PLCL)were used to prepare bilayered guided bone regeneration membranes,and its morphology,hydrophilicity,surface roughness and mechanical properties were *** the same time,the drug release behaviors and cell compatibility of the bilayered membranes were *** results showed that SF/PLCL bi-layered membranes had good mechanical properties and surface hydrophilicity,and the drug-loaded bi-layered membranes had good cell *** bilayered membranes fabricated in this study are of potential for applying in the oral health field to promote bone regeneration.

关键词： silk fibroin(SF) poly-L-lactide lactone(PLCL) guided bone regeneration(GBR) oral health

Development *** in limited urban sprawl:An integrated framework for resolving the urban boundary dilemma in China

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Journal of Geographical Sciences 2024年第7期34卷 1371-1393页

作者： SONG xiangxiang ZHANG Zuo WANG Zhe LIU Yanzhong School of Public Administration Central China Normal UniversityWuhan430079China College of Resource and Environmental Engineering Wuhan University of Science and TechnologyWuhan430081China

The strategic delineation of the urban development boundary(UDB)is an effective initiative for efficient land resource allocation and for facilitating planned urban *** align with sustainable development objectives,UDB definitions have evolved to reconcile urban development with ecological *** study presents a UDB delineation framework from an integrated perspective that incorporates both demand-oriented and comprehensive ***,the urban construction land demand area was estimated based on population projections,meanwhile,the ecological red line(ERL)was delineated and integrated into the evaluation of the construction land ***,with the demand area as the simulation target and unsuitable areas as comprehensive constraints,the UDB was delineated by simulating future land use *** proposed framework was applied to Wuhan,a rapidly urbanizing city in central China,where the delineation of the UDB serves the dual purpose of managing the rapid expansion of built-up land and achieving a harmonious balance between urban development imperatives and ecological protection ***,based on the results and analysis,policy implications for the rational spatial planning of Wuhan were proposed,encompassing the spatial patterns and scientific decision-making in ecological conservation and urban *** results demonstrate that the efficacy of adopting a comprehensive perspective in delineating UDB effectively reconciles the competing needs of urban development and *** framework and the policy insights derived in this study could inform spatial planning efforts not only in Wuhan but also in other cities facing the dilemma of urban development and ecological protection.

关键词： urban development boundary(UDB) ecological red line(ERL) urban land suitability land use simulation integrated framework spatial decision-making

Dual sliding mode coordinated control of manipulator grasping system with visual assistance

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Control Theory and Technology 2024年第1期22卷 106-121页

作者： Pengxin Zhang Haisheng Yu xiangxiang Meng Zhe Li Qing Yang Xunkai Gao College of Automation Qingdao UniversityQingdao266071ShandongChina Shandong Province Key Laboratory of Industrial Control Technology Qingdao266071ShandongChina

The operation efficiency of the manipulator is placed in the primary position in automatic production. This paper proposes a coordinated control strategy for joint servo and visual servo to enable timely transfer and accurate gripping in the working area. Aiming at the issues of chattering and slow convergence of traditional sliding mode controller, a fast variable power reaching rate on the basis of the non-singular fast terminal sliding mode controller is proposed, which can effectively reduce the convergence time and chattering. For the purpose of addressing the problem that the traditional visual servo control method is sensitive to the environment, a visual servo controller based on integral sliding mode is proposed, to ensure the favorable positioning accuracy of the manipulator. Based on the two proposed controllers mentioned above, a coordinated control strategy is used to implement the control of the manipulator. Finally, the upper computer software is developed using the C# programming language to monitor the workstation. The feasibility of the above-mentioned method is verified through multiple simulations and experiments.

关键词： Automatic production Joint servo Visual servo Coordinated control Non-singular fast terminal sliding mode Integral sliding mode

Shape Decoupling Effects and Rotation of Deformed Halo Nuclei

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原子核物理评论 2024年第1期41卷 75-85页

作者： SUN xiangxiang ZHOU Shangui School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Peng Huanwu Collaborative Center for Research and Education Beihang UniversityBeijing 100191China

With the development of radioactive-ion-beam facilities,many exotic phenomena have been discovered or predicted in the nuclei far from the stability line,including cluster structure,shell structure,deformed halo,and shape decoupling *** study of exotic nuclear phenomena is at the frontier of nuclear physics *** covariant density functional theory(CDFT)is one of the most successful microscopic models in describing the structure of nuclei in almost the whole nuclear *** the framework of CDFT,toward a proper treatment of deformation and weak binding,the deformed relativistic Hartree-Bogoliubov theory in continuum(DRHBc)has been *** this contribution,we review the applications and extensions of the DRHBc theory to the study of exotic *** DRHBc theory has been used to investigate the deformed halos in B,C,Ne,Na,and Mg isotopes and the theoretical descriptions are reasonably consistent with available data.A DRHBc Mass Table Collaboration has been founded,aiming at a high precision nuclear mass table with deformation and continuum effects included,which is *** implementing the angular momentum projection based on the DRHBc theory,the rotational excitations of deformed halos have been investigated and it is shown that the deformed halos and shape decoupling effects also exist in the low-lying rotational excitation states of deformed halo nuclei.

关键词： exotic nuclei deformed halo shape decoupling effect nuclear mass rotational excitation density functional theory

多次地震作用下高层建筑结构动力特性识别和响应分析

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建筑结构学报 2023年第1期44卷 225-234页

作者：樊圆卢文胜虞终军任祥香同济大学土木工程学院上海200092 同济大学建筑设计研究院(集团)有限公司上海200092

针对高层结构动力特性和动力响应的研究可为结构和非结构构件的抗震设计提供依据。为了排除结构形式、高度等对动力特性和响应分析的影响,选用遭遇多次地震的高层结构的结构响应作为数据集,分析结构动力特性在多次地震作用下的变化趋势... 详细信息

针对高层结构动力特性和动力响应的研究可为结构和非结构构件的抗震设计提供依据。为了排除结构形式、高度等对动力特性和响应分析的影响,选用遭遇多次地震的高层结构的结构响应作为数据集,分析结构动力特性在多次地震作用下的变化趋势,研究结构加速度响应的分布规律,分析结构加速度响应与地震动参数间的相关性。结果表明:随机子空间算法能够较为准确地通过强震记录识别结构的动力特性,且使用衰减段记录更易得到识别结果;结构1阶频率在历次地震中的变化可达9.66%,阻尼比的变化可达17.6%;楼面加速度放大系数与结构周期点处的反应谱值及地震动周期0.45 s及以上成分的相关性较大。

关键词：高层结构强震记录结构台阵动力特性动力响应