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Application of buckling-restrained braces in the seismic control of suspension bridges

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Earthquake Engineering and Engineering Vibration 2022年第2期21卷 543-557页

作者： long lu College of Environment and Civil Engineering Chengdu University of TechnologyChengdu 610059China

Buckling-restrained braces(BRBs)are widely used to improve the seismic performance of *** paper aims to introduce BRBs to suspension bridges and assess the seismic performance of bridges with *** the Dadu River Bridge as a case study,an FEA model of the bridge is established,and different seismic measures(BRBs between the deck and the tower,BRBs at the middle of the span to replace the inclined suspenders to connect the deck and the main cables,fluid viscous dampers(FVDs)between the deck and the tower,the combination of BRBs to replace the inclined suspenders as well as FVDs between the deck and the tower)are applied to the suspension *** influence of the parameters of BRBs on the seismic response of the suspension bridge is studied,and the performance of the bridge with BRBs is compared with that of the bridge with *** results indicate that the use of BRBs in place of the inclined suspenders is beneficial to reduce the displacement of the deck and limit the shear force and bending moment of the *** seismic performance of the suspension bridge with BRBs and FVDs is better than that of the bridge with BRBs or ***,the application of BRBs is a feasible method to improve the seismic performance of the suspension bridge.

关键词： buckling-restrained braces fluid viscous dampers suspension bridge seismic response earthquake

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公路拓宽工程中路基差异沉降特性研究

鄂州大学学报 2024年第2期31卷 109-112页

作者：鹿龙中铁十八局集团有限公司天津国际工程分公司天津300222

以乌干达KASESE公路改扩建工程为对象,研究不同路基高度以及是否有支挡结构对路基竖向沉降和侧向变形的影响。研究结果表明,随着路基填筑高度的增加,新填筑路基的沉降量均小于既有路基的沉降量;在相同的路基填筑高度下,有支挡结构和无... 详细信息

以乌干达KASESE公路改扩建工程为对象,研究不同路基高度以及是否有支挡结构对路基竖向沉降和侧向变形的影响。研究结果表明,随着路基填筑高度的增加,新填筑路基的沉降量均小于既有路基的沉降量;在相同的路基填筑高度下,有支挡结构和无支挡结构的既有路基部分的沉降量相近,无支挡结构的新填筑路基沉降量大于有支挡结构的新填筑路基沉降量;随着路基填筑高度的增加,既有路基的侧向变形呈现缓慢增加的变化趋势,且数值均较小,新填筑路基的侧向变形增加较快;在相同的路基填筑高度条件下,无支挡结构的新填筑路基侧向变形大于有支挡结构的新填筑路基侧向变形,由此表明设置护脚支挡结构对于控制新旧路基的侧向变形具发挥有效作用。

关键词：软土地基公路扩宽差异沉降现场监测沉降过程

B(E2) Saturation in the Rare-Earth Region

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Chinese Physics Letters 1997年第5期14卷 340-343页

作者： long Gui-lu Department of Physics Tsinghua UniversityBeijing 100084 Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100080

The quadrupole interactions between neutrons and protons are calculated using Nilsson+BCS model for the neutron-rich even-even rare-earth *** is used to study the saturation of B(E2)'s in this mass *** neutron numbers at which saturation of B(E2)occurs are calculated for each isotopic *** particular,the calculation suggests that B(E2)saturation may occur in the 2nd half of the 82-126 major shell in erbium and ytterbium.

关键词： B(E2) saturation Rare

A bright integrated photon pair source

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Science China(Physics,Mechanics & Astronomy) 2020年第2期63卷 1-2页

作者： Gui-lu long Department of Physics Tsinghua University

The generation and detection of single photons and photon pairs are crucial to quantum information processing[1-7].Of the various techniques,integrated photonics plays an important *** has the advantages of mature complementary metal-oxide-semiconductor(CMOS)mass-fabrication,miniaturization,scalability,stability and reconfigurability,thus becoming a natural choice for integrated quantum information ***,due to the lack of second-order nonlinearity,the silicon chip usually adopts the relatively weak third-order nonlinear interaction,namely the spontaneous four-wave mixing,to generate photon *** improve the photon pair generation rate,silicon micro-ring resonators are considered candidates capable of enhancing the intense intracavity field for the pump,signal and idler photons.

关键词： pump photon quantum

General Quantum Interference Principle and Duality Computer

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Communications in Theoretical Physics 2006年第5期45卷 825-844页

作者： long Gui-lu Key Laboratory for Quantum Information and Measurements and Department of Physics Tsinghua University Beijing100084 China Key Laboratory of Atomic and Molecular Nanosciences Tsinghua University Beijing 100084 China

In this article, we propose a general principle of quantum interference for quantum system, and based on this we propose a new type of computing machine, the duality computer, that may outperform in principle both classical computer and the quantum computer. According to the general principle of quantum interference, the very essence of quantum interference is the interference of the sub-waves of the quantum system itself A quantum system considered here can be any quantum system： a single microscopic particle, a composite quantum system such as an atom or a molecule, or a loose collection of a few quantum objects such as two independent photons. In the duality computer, the wave of the duality computer is split into several sub-waves and they pass through different routes, where different computing gate operations are performed. These sub-waves are then re-combined to interfere to give the computational results. The quantum computer, however, has only used the particle nature of quantum object. In a duality computer, it may be possible to find a marked item from an unsorted database using only a single query, and all NP-complete problems may have polynomial algorithms. Two proof-of-the-principle designs of the duality computer are presented： the giant molecule scheme and the nonlinear quantum optics scheme. We also propose thought experiment to check the related fundamental issues, the measurement efficiency of a partial wave function.

关键词： quantum interference duality computer NP-complete = P

Interfacing superconducting and atomic qubits via unconventional geometric quantum operations

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Science China(Physics,Mechanics & Astronomy) 2022年第4期65卷 1-2页

作者： Gui-lu long Department of Physics Tsinghua UniversityBeijing100084China

Interfacing or entanglement between spatially separated quantum systems,such as superconducting qubits,semiconductor quantum dots,atomic qubits,and solid-state color centers,is crucial in quantum networks and distributed quantum computation[1].Significant progress has been made in generating entanglement between spatially separated quantum systems via optical links[2],while remote superconducting chips,whose quantum states are easily spoiled by optical photons,have been entangled via cryogenic microwave links[3].

关键词： quantum superconducting spatially

小胶质细胞在脓毒症相关性脑病中作用的研究进展

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生理学报 2024年第2期76卷 289-300页

作者：龙陆红曹文宇徐杨向宇燕南华大学衡阳医学院应用解剖学与生殖医学研究所衡阳421001

脓毒症相关性脑病(sepsis-associated encephalopathy,SAE)是指由脓毒症引起的弥漫性脑功能障碍,其临床主要特征为注意力下降,定向力障碍,易激惹,严重时患者会出现昏睡、昏迷等症状。SAE的发病机制主要包括神经炎症、血脑屏障破坏、脑... 详细信息

脓毒症相关性脑病(sepsis-associated encephalopathy,SAE)是指由脓毒症引起的弥漫性脑功能障碍,其临床主要特征为注意力下降,定向力障碍,易激惹,严重时患者会出现昏睡、昏迷等症状。SAE的发病机制主要包括神经炎症、血脑屏障破坏、脑血管功能障碍以及神经代谢改变,其中神经炎症是SAE的核心病理过程。小胶质细胞被视为中枢神经系统的重要免疫细胞,在神经炎症中具有重要作用。本文系统描述了小胶质细胞在SAE发生和发展中扮演的角色,并详细探讨了小胶质细胞的表型和相关信号通路,以期明确小胶质细胞在SAE中的作用,为临床治疗提供理论基础。

关键词：脓毒症相关性脑病脓毒症小胶质细胞神经炎症

What is the wave function in quantum mechanics？

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Science Bulletin 2017年第20期62卷 1355-1356页

作者： Gui-lu long State Key Laboratory of Low-dimensional Quantum Physics and Department of Physics Tsinghua University Beijing 100084 China The Innovative Center of Quantum Matter Beijing 100084 China Tsinghua National Laboratory of Information Science and Technology Beijing 100084 China

Quantum mechanics, is a pillar of modern science and technology, and has benefited human society for a century. Quantum mechanics works well, its predictions agree amazingly well with experiments, and its mathematical... 详细信息

关键词： quantum mechanics function

Lithium niobate microresonator-based spectrally multiplexed entangled photon pairs

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Science China(Physics,Mechanics & Astronomy) 2022年第9期65卷 1-2页

作者： Gui-lu long Department of Physics Tsinghua UniversityBeijing 100084China

Integrated quantum photonics combining the micron-scale fabrication technique and quantum information carriers promises a new platform for quantum computation and communication systems [1,2]. Integrated chips remarkably reduce the footprint of the quantum processor and make complicated quantum networks into reality. Nevertheless, to fulfill the increasing need of massive qubits in quantum networks, quantum sources of multiple qubits are widely requested [3].

关键词： quantum remarkably networks