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Optimal Stiffness for Flexible Connectors on A Mobile Offshore Base at Rough Sea States

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china Ocean Engineering 2018年第6期32卷 683-695页

作者： WU Lin-jian wang yuan-zhan wang yu-chi CHEN Jia-yu LI Yi LI Qing-mei XIE Tao State Key Laboratory of Hydraulic Engineering Simulation and Safety Collaborative Innovation Center for Advanced Ship and Deep-Sea ExplorationTianjin UniversityTianjin 300072China School of Civil Engineering Tianjin UniversityTianjin 300072China College of Engineering Ocean University of ChinaQingdao 266100China Chongqing Shipping Engineering Survey and Design Institute of the Yangtze River Chongqing 401147China School of River&Ocean Engineering Chongqing Jiaotong UniversityChongqing 400074China

This paper investigates a simplified method to determine the optimal stiffness of flexible connectors on a mobile offshore base(MOB) during the preliminary design stage. A three-module numerical model of an MOB was used as a case study. Numerous constraint forces and relative displacements for the connectors at rough sea states with different wave angles were utilized to determine the optimized stiffness of the flexible connectors. The range of optimal stiffnesses for the connectors was obtained based on the combination and intersection of the optimized stiffness results, and the implementation steps were elaborated in detail. The percentage reductions of the optimized and optimal stiffness of the flexible connector were determined to quantitatively evaluate the decreases of the constraint force and relative displacement of the connectors compared with those calculated by using the original range of the connector stiffnesses. The results indicate the accuracy and feasibility of this method for determining the optimal stiffness of the flexible connectors and demonstrate the rationality and practicability of the optimal stiffness results. The research ideas, calculation process, and solutions for the optimal stiffness of the flexible connectors of an MOB in this paper can provide valuable technical support for the design of the connectors in similar semisubmersible floating structures.

关键词： mobile offshore base(MOB) flexible connectors the optimal stiffness rough sea states

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高强螺栓连接系统管廊架设计

价值工程 2024年第4期43卷 61-63页

作者：王赤宇付鹏飞陈磊谭鹏塔里木油田公司油气工程研究院库尔勒841000 中油(新疆)石油工程有限公司克拉玛依834000

通过设计实例,介绍了某油气站场系统管廊架的结构设计过程,着重讲述了系统管廊架高强度螺栓连接的结构布置、节点设计、强度计算等方面的主要设计经验和建议,总结了高强度螺栓连接的优缺点和设计注意事项,为同类工程的设计提供了详实的... 详细信息

通过设计实例,介绍了某油气站场系统管廊架的结构设计过程,着重讲述了系统管廊架高强度螺栓连接的结构布置、节点设计、强度计算等方面的主要设计经验和建议,总结了高强度螺栓连接的优缺点和设计注意事项,为同类工程的设计提供了详实的参考依据。

关键词：管廊架钢结构高强度螺栓连接节点设计

维普期刊数据库博看期刊

Numerical Analyses of Caisson Breakwaters on Soft Foundations Under Wave Cyclic Loading

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china Ocean Engineering 2016年第1期30卷 1-18页

作者：王元战焉振王禹迟 National Key Laboratory of Water Conservancy Engineering Simulation and Security Collaborative Innovation Center for Advanced Ship and Deep-Sea ExplorationTianjin University

A caisson breakwater is built on soft foundations after replacing the upper soft layer with sand. This paper presents a dynamic finite element method to investigate the strength degradation and associated pore pressure development of the intercalated soft layer under wave cyclic loading. By combining the undrained shear strength with the empirical formula of overconsolidation clay produced by unloading and the development model of pore pressure, the dynamic degradation law that describes the undrained shear strength as a function of cycle number and stress level is derived. Based on the proposed dynamic degradation law and M-C yield criterion, a dynamic finite element method is numerically implemented to predict changes in undrained shear strength of the intercalated soft layer by using the general-purpose FEM software ABAQUS, and the accuracy of the method is verified. The effects of cycle number and amplitude of the wave force on the degradation of the undrained shear strength of the intercalated soft layer and the associated excess pore pressure response are investigated by analyzing an overall distribution and three typical sections underneath the breakwater. By comparing the undrained shear strength distributions obtained by the static method and the quasi-static method with the undrained shear strength distributions obtained by the dynamic finite element method in the three typical sections, the superiority of the dynamic finite element method in predicting changes in undrained shear strength is demonstrated.

关键词： soft layer strength degradation pore pressure development wave cyclic loading dynamic finite element method

Programmable silicon-photonic quantum simulator based on a linear combination of unitaries

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Photonics Research 2024年第8期12卷 1760-1767页

作者： yuE yu yuLIN chi CHONGHAO ZHAI JIESHAN HUANG QIHUANG GONG JIANWEI wang State Key Laboratory for Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100871China Frontiers Science Center for Nano-optoelectronics&Collaborative Innovation Center of Quantum Matter Peking UniversityBeijing 100871China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China Yangtze Delta Institute of Optoelectronics Peking UniversityNantong 226010China Hefei National Laboratory Hefei 230088China Department of Electrical and Computer Engineering University of WashingtonSeattleWashington 98195USA china Mobile Research Institute Beijing 100053China

Simulating the dynamic evolution of physical and molecular systems in a quantum computer is of fundamental interest in many *** implementation of dynamics simulation requires efficient quantum *** Lie-Trotter-Suzuki approximation algorithm,also known as the Trotterization,is basic in Hamiltonian dynamics simulation.A multi-product algorithm that is a linear combination of multiple Trotterizations has been proposed to improve the approximation ***,implementing such multiproduct Trotterization in quantum computers remains challenging due to the requirements of highly controllable and precise quantum entangling operations with high success ***,we report a programmable integrated-photonic quantum simulator based on a linear combination of unitaries,which can be tailored for implementing the linearly combined multiple Trotterizations,and on the simulator we benchmark quantum simulation of Hamiltonian *** modify the multi-product algorithm by integrating it with oblivious amplitude amplification to simultaneously reach high simulation precision and high success *** quantum simulator is devised and fabricated on a large-scale silicon-photonic quantum chip,which allows the initialization,manipulation,and measurement of arbitrary four-qubit states and linearly combined unitary *** an example,the quantum simulator is reprogrammed to emulate the dynamics of an electron spin and nuclear spin coupled *** work promises the practical dynamics simulations of real-world physical and molecular systems in future large-scale quantum computers.

关键词： quantum Hamiltonian linearly

Hydrazone derivatives in agrochemical discovery and development

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chinese Chemical Letters 2024年第3期35卷 104-113页

作者： Ya wang Shengxin Guo Lijiao yu Wei Zhang Zhenchao wang Yonggui Robin chi Jian Wu National Key Laboratory of Green Pesticide Key Laboratory of Green Pesticide and Agricultural BioengineeringMinistry of EducationGuizhou UniversityHuaxi DistrictGuiyang 550025China Division of Chemistry&Biological Chemistry School of Physical&Mathematical SciencesNanyang Technological UniversitySingapore 637371Singapore

As a common active substructure,hydrazone has attracted increasing attention and is considered essential for pesticide *** has been widely regarded as a potential insecticidal,antibacterial,antifungal,antiviral,and herbicidal *** this review,we highlight the pesticide versatility of hydrazone fragments and provide a comprehensive summary of the biological activity,structure-activity relationship analysis(SARs),and primary mechanism of their *** profile is expected to give valuable information for discovering new pesticides.

关键词： Hydrazone Agrochemicals Biological activity Structure-activity relationship Preliminary mechanism

Amine-functionalized metal organic framework@graphene oxide as filler in PAEK-containing carboxyl group membrane for ultrafiltration with ultra-high permeability and strong fouling resistance

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chinese Journal of Chemical Engineering 2024年第6期70卷 93-103页

作者： Zhaoli wang Wenjing Li Yi Zhang Yanyin Cheng Junjian yu Tianming Dong Xiaoyu chi Di Liu Zhe wang School of Chemistry and Life Science Changchun University of TechnologyChangchun 130012China Advanced Institute of Materials Science Changchun University of TechnologyChangchun 130012China Key Laboratory of Advanced Functional Polymer Membrane Materials of Jilin Province Changchun 130012China

Achieving high fouling resistance and permeability using membrane separation technology in water treatment processes remains a *** this work,a novel mixed-matrix membrane(MMM)(poly(arylene ether ketone)[PAEK]-containing carboxyl groups[PAEK-COOH]/UiO-66-NH_(2)@graphene oxide[GO])with superb fouling resistance and high permeability was prepared by the nonsolvent-induced phase separation method,by in-situ growth of UiO-66-NH_(2) on the GO layer,and by preparing hydrophilic *** the basis of the structure and performance analysis of the MMM,the maximum water flux reached 591.25 L·m^(-2)·h^(-1) for PAEK-COOH/UiO-66-NH_(2)@GO,whereas the retention rate for bovine serum albumin increased from 85.40%to 94.87%.As the loading gradually increased,the hydrophilicity of the MMMs increased,significantly enhancing their fouling *** strongest anti-fouling ability observed was 94.74%,which was 2.02 times greater than that of the pure *** the same time,the MMMs contained internal amide and hydrogen bonds during the preparation process,forming a cross-linked structure,which further enhanced the mechanical strength and chemical *** summary,the MMMs with high retention rate,strong permeability,and anti-fouling ability were successfully prepared.

关键词： Poly(arylene ether ketone)-containing Carboxyl groups(PAEK-COOH) UiO-66-NH_(2)@graphene oxide Hydrophilic modification Ultra-high selectivity Strong anti-fouling

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抗血小板药物的质量研究进展

国外医药（抗生素分册） 2024年第1期45卷 35-43页

作者：赵欢张春然王宇驰王瑛瑛张静霞李诗媛成都大学成都610106 四川大学华西药学院成都610065

抗血小板药物近年来呈现蓬勃发展的态势,其质量控制标准也在不断发展和完善。本综述基于《中华人民共和国药典》2020年版(ChP 2020)、《美国药典》43版(USP 43)、《日本药典》17版(JP 17)等国内外及相关指导原则等参考资料,全面归纳了... 详细信息

抗血小板药物近年来呈现蓬勃发展的态势,其质量控制标准也在不断发展和完善。本综述基于《中华人民共和国药典》2020年版(ChP 2020)、《美国药典》43版(USP 43)、《日本药典》17版(JP 17)等国内外及相关指导原则等参考资料,全面归纳了抗血小板药物在药典中的收录情况,对常见的抗血小板药物的质量控制方法进行总结,对含量测定和体内药物分析方法等项目进行全面分析,期望为抗血小板药物的研究与开发提供参考。

关键词：抗血小板药物含量测定方法体内药物分析有关物质检查吩噻吡啶药物

Dynamic Stability Analysis of Caisson Breakwater in Lifetime Considering the Annual Frequency of Severe Storm

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china Ocean Engineering 2015年第2期29卷 287-300页

作者：王禹迟王元战洪宁宁 State Key Laboratory for Simulation & Safety of Hydraulic Engineering Collaborative Innovation Center for Advanced Ship and Deep-Sea ExplorationTianjin University

In the dynamic stability analysis of a caisson breakwater, most of current studies pay attention to the motion characteristics of caisson breakwaters under a single periodical breaking wave excitation. And in the lifetime stability analysis of caisson breakwater, it is assumed that the caisson breakwater suffers storm wave excitation once annually in the design lifetime. However, the number of annual severe storm occurrence is a random variable. In this paper, a series of random waves are generated by the Wen Sheng-chang wave spectrum, and the histories of successive and long-term random wave forces are built up by using the improved Goda wave force model. It is assumed that the number of annual severe storm occurrence is in the Poisson distribution over the 50-year design lifetime, and the history of random wave excitation is generated for each storm by the wave spectrum. The response histories of the caisson breakwater to the random waves over 50-year design lifetime are calculated and taken as a set of samples. On the basis of the Monte Carlo simulation technique, a large number of samples can be obtained, and the probability assessment of the safety of the breakwater during the complete design lifetime is obtained by statistical analysis of a large number of samples. Finally, the procedure of probability assessment of the breakwater safety is illustrated by an example.

关键词： caisson breakwater dynamic stability lifetime wave spectrum annual storm frequency

Global hybrid simulations of soft X-ray emissions in the Earth’s magnetosheath

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Earth and Planetary Physics 2024年第1期8卷 47-58页

作者： Jin Guo TianRan Sun San Lu QuanMing Lu yu Lin XueYi wang chi wang RongSheng wang Kai Huang School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Comparative Planetology/CAS Key Lab of Geospace Environment University of Science and Technology of ChinaHefei 230026China Collaborative Innovation Center of Astronautical Science and Technology Harbin 150001China National Space Science Center Chinese Academy of SciencesBeijing 100190China Physics Department Auburn UniversityAuburnALUSA

Earth’s magnetopause is a thin boundary separating the shocked solar wind plasma from the magnetospheric plasmas,and it is also the boundary of the solar wind energy transport to the *** X-ray imaging allows investigation of the large-scale magnetopause by providing a two-dimensional(2-D)global view from a *** performing 3-D global hybrid-particle-in-cell(hybrid-PIC)simulations,we obtain soft X-ray images of Earth’s magnetopause under different solar wind conditions,such as different plasma densities and directions of the southward interplanetary magnetic *** all cases,magnetic reconnection occurs at low latitude *** soft X-ray images observed by a hypothetical satellite are shown,with all of the following identified:the boundary of the magnetopause,the cusps,and the *** X-ray emissivity in the magnetosheath is characterized by large amplitude fluctuations(up to 160%);however,the maximum line-of-sight-integrated X-ray intensity matches the tangent directions of the magnetopause well,indicating that these fluctuations have limited impact on identifying the magnetopause boundary in the X-ray ***,the magnetopause boundary can be identified using multiple viewing *** also find that solar wind conditions have little effect on the magnetopause *** Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)mission will provide X-ray images of the magnetopause for the first time,and our global hybrid-PIC simulation results can help better understand the 2-D X-ray images of the magnetopause from a 3-D perspective,with particle kinetic effects considered.

关键词： magnetopause X-ray emissivity X-ray imaging SMILE global hybrid-PIC simulation