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Evolution and final closure of the Mongol-Okhotsk Ocean

Science China Earth Sciences 2023年第11期66卷 2497-2513页

作者： pan ZHAO Bei XU Yan CHEN State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Hebei Key Laboratory of Strategic Critical Mineral Resources Hebei GEO UniversityShijiazhuang 050031China Universitéd’Orléans CNRSBRGMISTOUMR 7327Orléans F-45071France

Mongol-Okhotsk Orogenic Belt is the last main orogen that constructs modern tectonic framework of northeastern Asia. It has recorded the long-term evolution of the Mongol-Okhotsk Ocean(MOO) from its Early Paleozoic initial opening,through the Late Paleozoic-Early Mesozoic subduction, to its Mesozoic final closure, leading to the amalgamation of the Siberian Craton(SIB) and North China-Amuria Block(NCC-AMB). Opening of the MOO can be traced to the early stage of the Early Paleozoic. Northward subduction of the Mongol-Okhotsk oceanic slab beneath the southern margin of the SIB initiated in the Silurian, whereas the southward subduction beneath the northern margin of the NCC-AMB started in the Late Devonian. The bidirectional subduction of the Mongol-Okhotsk oceanic slab resulted in pulse arc magmatism, with three main peaks in the earliest Carboniferous, Late Permian, and Late Triassic-Early Jurassic. In the Late Triassic, the collision between the AMB and Western Mongolian Blocks led to the bending of the Western Mongolian Blocks, which caused the initial closure of the MOO in its western segment. Due to the clockwise rotation of the SIB and counterclockwise rotation of the NCC-AMB, the MOO showed a scissor-like closure from west to east. The final closure of the MOO occurred in the Middle-Late Jurassic, which also resulted in the formation of the Mongol Orocline. Since then, the amalgamation of blocks in northeastern Asia has finished, and the northeastern Asian continent went into the intraplate evolutional stage.

关键词： Northeastern Asia Mongol-Okhotsk Ocean Paleozoic-Mesozoic Subduction initiation Scissor-like closure

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Mirror-assisted multi-view high-speed digital image correlation for dual-surface dynamic deformation measurement

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Science China(Technological Sciences) 2023年第3期66卷 807-820页

作者： XIE RuiLi CHEN Bin pan Bing Institute of Solid Mechanics Beihang UniversityBeijing 100191China Department of Fiber and Polymer Technology KTH Royal Institute of TechnologyStockholm 10044Sweden

Based on the recently proposed mirror-assisted multi-view digital image correlation(MV-DIC),we establish a cost-effective and easy-to-implement mirror-assisted multi-view high-speed digital image correlation(MVHS-DIC)method and explore its applications for dual-surface full-field dynamic deformation *** contrast to the general requirement of four expensive high-speed cameras for dual-surface dynamic deformation field measurement,the established mirror-assisted MVHS-DIC halves the cost by involving only two synchronized high-speed cameras and two planar *** two synchronized high-speed cameras can dynamically measure the front and rear surfaces of a sheet sample simultaneously through the reflection of the two *** results on the two surfaces are then transformed into the same coordinate system,leading to the required dual-surface 3D dynamical deformation *** effectiveness and accuracy of the established system are validated through modal tests of a cantilever aluminum *** vibration measurement of a drum and dual-surface transient deformation measurement of a smartphone in the drop-collision process further prove its *** from the attractive advantages of multi-view dynamic deformation measurement in a cost-efficient way,the established mirror-assisted MVHS-DIC is expected to encourage more comprehensive dynamic mechanical behavior characterization of regular-sized materials and structures in vibration and impact engineering fields.

关键词： multi-view high-speed digital image correlation dual-surface dynamic deformation measurement

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A Novel Trustworthiness Measurement Model Based on Weight and User Feedback

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Chinese Journal of Electronics 2022年第4期31卷 612-625页

作者： ZHOU Wei MA Yanfang pan Haiyu School of Computer Science and Technology Huaibei Normal University School of Computer Science and Information Engineering Changzhou Institute of Technology School of Computer Science and Information Security Guilin University of Electronic Technology

Software trustworthiness is an essential criterion for evaluating software quality. In componentbased software, different components play different roles and different users give different grades of trustworthiness after using the software. The two elements will both affect the trustworthiness of software. When the software quality is evaluated comprehensively, it is necessary to consider the weight of component and user feedback. According to different construction of components, the different trustworthiness measurement models are established based on the weight of components and user feedback. Algorithms of these trustworthiness measurement models are designed in order to obtain the corresponding trustworthiness measurement value automatically. The feasibility of these trustworthiness measurement models is demonstrated by a train ticket purchase system.

关键词： software quality Data security train ticket purchase system component-based software software trustworthiness trustworthiness measurement model software quality evaluation Object-oriented programming object-oriented programming Software engineering techniques trusted computing user feedback

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Suboptimal Rayleigh damping coefficients in seismic analysis of viscously-damped structures

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Earthquake Engineering and Engineering Vibration 2014年第4期13卷 653-670页

作者： pan Danguang Chen Genda Wang Zuocai Department of Civil Engineering University of Science and Technology Beijing Department of Civil Architectural and Environmental Engineering Missouri University of Science and Technology Department of Civil Engineering Hefei University of Technology

An optimization method for the consistent evaluation of two Rayleigh damping coefficients is proposed. By minimizing an objective function such as an error term of the peak displacement of a structure, the two coefficients can be determined with response spectral analysis. The optimization method degenerates into the conventional method used in current practices when only two modes of vibration are included in the objective function. Therefore, the proposed method with all significant modes included for simplicity in practical applications results in suboptimal damping coefficients. The effects of both spatial distribution and frequency content of excitations as well as structural dynamic characteristics on the evaluation of Rayleigh damping coefficients were investigated with a five-story building structure. Two application examples with a 62-story high-rise building and a 840 m long cable-stayed bridge under ten earthquake excitations demonstrated the accuracy and effectiveness of the proposed method to account for all of the above effects.

关键词： Rayleigh damping response spectral analysis structural dynamics structural analysis optimization method

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“战略三脚架”视角下中国在“一带一路”沿线与非沿线国家的投资动机影响因素比较研究

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科技促进发展 2024年第2期20卷 159-168页

作者：艾旦娜·别克潘娜中国科学院大学经济与管理学院北京100190 北京北大纵横管理咨询有限责任公司北京100029

随着“一带一路”政策的出台,企业投资热情高涨,作为国家战略性新兴产业,新能源产业的对外投资对自身发展具有重要意义,明确其在“一带一路”沿线与非沿线国家的投资动向有助于把握政策机遇和赋能产业发展。本研究基于商务部截至2015年... 详细信息

随着“一带一路”政策的出台,企业投资热情高涨,作为国家战略性新兴产业,新能源产业的对外投资对自身发展具有重要意义,明确其在“一带一路”沿线与非沿线国家的投资动向有助于把握政策机遇和赋能产业发展。本研究基于商务部截至2015年的416条中国新能源企业的对外投资事件,将其投资动机分为销售服务、生产研发和工程投资3类,并从“战略三脚架”的理论框架出发,对企业基于不同投资动机看重的“一带一路”沿线和非沿线东道国的区位优势进行了实证研究。结果表明:在非“一带一路”沿线国家投资时,中国新能源企业更加看重东道国的政治制度稳定性和基础设施水平,如通讯设施和技术水平;而在“一带一路”沿线国家投资时,企业则更加看重东道国的营商环境。

关键词：新能源产业对外直接投资动机战略三脚架

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基于超分子作用构筑环糊精基形状记忆聚合物的研究进展

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高分子通报 2024年第8期37卷 1001-1010页

作者：吴宇陈舒晗潘毅郑朝晖丁小斌中国科学院成都有机化学研究所成都610041 中国科学院大学北京100049

形状记忆聚合物(SMPs)作为一种智能材料,具有独特的形状记忆和变形恢复能力,在电子器件、航空航天结构和生物医学工程等领域得到广泛应用。环糊精(CD)是一类具有疏水空腔和亲水表面的天然大分子,其独特的结构为设计和合成具有所需结构... 详细信息

形状记忆聚合物(SMPs)作为一种智能材料,具有独特的形状记忆和变形恢复能力,在电子器件、航空航天结构和生物医学工程等领域得到广泛应用。环糊精(CD)是一类具有疏水空腔和亲水表面的天然大分子,其独特的结构为设计和合成具有所需结构和功能的环糊精基形状记忆聚合物提供了可能。本文主要对CD的结构性质、基于超分子作用构筑CD基形状记忆聚合物及其应用进行了综述,并展望了其未来的发展方向。

关键词：超分子作用形状记忆环糊精智能材料

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基于蛇优化算法的电力系统无功优化

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现代电子技术 2024年第8期47卷 126-130页

作者：彭琦涂建高珍陈恒潘成勇湖北师范大学电气工程与自动化学院湖北黄石435002

无功优化在电力系统中具有重要的意义,可以提高系统的功率因数,减少有功损耗并改善电压稳定性。蛇优化算法具有全局搜索能力和快速收敛的特点,故将该算法作为一种新的优化方法运用到无功优化中,建立以机端电压、变压器变比和无功补偿量... 详细信息

无功优化在电力系统中具有重要的意义,可以提高系统的功率因数,减少有功损耗并改善电压稳定性。蛇优化算法具有全局搜索能力和快速收敛的特点,故将该算法作为一种新的优化方法运用到无功优化中,建立以机端电压、变压器变比和无功补偿量为系统控制变量,以网络损耗最小为目标的无功优化模型。通过采用57节点系统,将蛇优化算法与粒子群算法、改进粒子群算法分别进行比较验证。实验结果表明,蛇优化算法能够有效地优化电力系统的无功功率,提高系统的性能和稳定性。

关键词：电力系统蛇优化算法无功优化功率损耗 57节点系统算法对比

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The cause of human fatigue and scenario analysisin the process of marine transportation

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Journal of Southeast University(English Edition) 2020年第1期36卷 107-117页

作者： pan Hengyi College of Transport and Communications Shanghai Maritime University Shanghai 201306 China

The framework of fatigue factors is constructed to reduce the number of maritime accidents caused by human *** on the study of maritime human fatigue,by screening and classifying it,there are 15 fatigue factors,which can be classified into 4 types:sleep,rest and rhythm;work factors;personal conditions;environmental *** factors are regarded as the variables for constructing *** importance,uncertainty,influence and dependence of variables and variable pairs were assessed by using morphological analysis,quantitative scales and correlation *** movement and workload are selected as the two key variables,which are regarded as the axes of generating *** of the scenarios is selected as the typical scenario to illustrate the relationship between the causes of ***,the analysis framework is constructed according to the fatigue factors relationship,and several potential solutions are proposed,which include the development of foresighted and flexible work plans,and the application of wearable facilities to improve monitoring and assessment *** proposed framework lays a theoretical foundation for studying maritime human fatigue,and scenario analysis can provide an effective strategy for reducing crews'fatigue.

关键词： maritime accident human fatigue fatigue factor scenario analysis scenario construction morphological analysis

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燃气轮发电机同期回路加装闭锁继电器的研究与应用

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山东电力高等专科学校学报 2024年第2期27卷 34-37页

作者：张庚午潘亚英河北华电石家庄热电有限公司河北石家庄050041

某些燃气轮发电机同期回路未配置闭锁继电器,存在非同期并网的安全隐患。为解决此问题,对某电厂燃气轮发电机同期回路进行研究,提出了在其同期回路中加装闭锁继电器的方案,进行闭锁继电器和中间继电器选型。现场试验证明,该方案能够提... 详细信息

某些燃气轮发电机同期回路未配置闭锁继电器,存在非同期并网的安全隐患。为解决此问题,对某电厂燃气轮发电机同期回路进行研究,提出了在其同期回路中加装闭锁继电器的方案,进行闭锁继电器和中间继电器选型。现场试验证明,该方案能够提高燃气轮发电机同期并列的可靠性,达到了消除非同期并列安全隐患的目的,可为同类型燃气轮发电机同期回路加装闭锁继电器提供借鉴。

关键词：同期回路闭锁继电器燃气轮发电机非同期并列

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Current progress of information fusion in China

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Chinese Science Bulletin 2013年第36期58卷 4533-4540页

作者： JING ZhongLiang pan Han QIN YanYuan School of Aeronautics and Astronautics Shanghai Jiao Tong University

Information fusion is a challenging task to extract the required information for high-level applications from various homogeneous or heterogeneous *** paper summarizes some improvements in recent five years in the presented structure of information fusion,including estimation fusion,image fusion and *** technologies of information fusion and their variants are *** the state-of-the-art of the algorithms for information fusion have been proposed,there still remains some fundamental challenges with regard to exploiting the emerging multi-sensors’characteristics and their special ***,some potential prospects of estimation fusion and image fusion are discussed.

关键词：信息融合进度中国图像融合多传感器发展前景挑战性结构

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