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Experimental and numerical study of buckling-restrained braces configured with out-of-plane eccentricity under cyclic loading

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Earthquake Engineering and Engineering Vibration 2024年第4期23卷 957-971页

作者： cao yongsheng Zhou Yun Takagi Jiro Jiang Ke Deng Xuesong Fang Xiaojun Earthquake Engineering Research&Test Center Guangzhou UniversityGuangzhou 510006China School of Civil Engineering Guangzhou UniversityGuangzhou 510006China Guangdong Provincial Key Laboratory of Earthquake Engineering and Applied Technology Guangzhou 510006China Key Laboratory of Earthquake Resistance Earthquake Mitigation and Structural SafetyMinistry of EducationGuangzhou 510006China Graduate School of Urban Environmental Sciences Tokyo Metropolitan UniversityTokyo 192-0397Japan Department of Civil and Natural Resources Engineering University of CanterburyChristchurch CT13ANNew Zealand

This study focuses on variations in the hysteretic behavior of buckling-restrained braces(BRBs)configured with or without out-of-plane eccentricity under cyclic ***-static experiments and numerical simulations were carried out on concentrically and eccentrically loaded BRB specimens to investigate the mechanical properties,energy dissipation performance,stress distribution,and high-order deformation *** experimental and numerical results showed that compared to the concentrically loaded BRBs,the stiffness,yield force,cumulated plastic ductility(CPD)coefficient,equivalent viscous damping coefficient and energy dissipation decreased,and the yield displacement and compression strength adjustment factor increased for the eccentrically loaded *** the existence of the out-of-plane eccentricity,the initial yield position changes from the yield segment to the junction between the yield segment and transition segment under a tensile load,while the initial high-order buckling pattern changes from a first-order C-shape to a secondorder S-shape under a compressive load.

关键词： buckling-restrained brace out-of-plane eccentricity experiment numerical simulation mechanical properties

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On-chip spiking neural networks based on add-drop ring microresonators and electrically reconfigurable phase-change material photonic switches

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Photonics Research 2024年第4期12卷 755-766页

作者： QIANG ZHANG NING JIANG YIQUN ZHANG ANRAN LI HUANHUAN XIONG GANG HU yongsheng cao KUN QIU School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengdu 611731China

We propose and numerically demonstrate a photonic computing primitive designed for integrated spiking neural networks (SNNs) based on add-drop ring microresonators (ADRMRs) and electrically reconfigurable phasechange material (PCM) photonic switches. In this neuromorphic system, the passive silicon-based ADRMR,equipped with a power-tunable auxiliary light, effectively demonstrates nonlinearity-induced dual neural dynamics encompassing spiking response and synaptic plasticity that can generate single-wavelength optical neural spikes with synaptic weight. By cascading these ADRMRs with different resonant wavelengths, weighted multiple-wavelength spikes can be feasibly output from the ADRMR-based hardware arrays when external wavelengthaddressable optical pulses are injected;subsequently, the cumulative power of these weighted output spikes is utilized to ascertain the activation status of the reconfigurable PCM photonic switches. Moreover, the reconfigurable mechanism driving the interconversion of the PCMs between the resonant-bonded crystalline states and the covalent-bonded amorphous states is achieved through precise thermal modulation. Drawing from the thermal properties, an innovative thermodynamic leaky integrate-and-firing (TLIF) neuron system is proposed. With the TLIF neuron system as the fundamental unit, a fully connected SNN is constructed to complete a classic deep learning task:the recognition of handwritten digit patterns. The simulation results reveal that the exemplary SNN can effectively recognize 10 numbers directly in the optical domain by employing the surrogate gradient algorithm. The theoretical verification of our architecture paves a whole new path for integrated photonic SNNs, with the potential to advance the field of neuromorphic photonic systems and enable more efficient spiking information processing.

关键词： neural networks precise

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Anti-inflammatory effects and mechanism of triterpene alcohols from camellia oil

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Food Science and Human Wellness 2024年

作者： Yonglin Li Shengmin Zhou Jie Qiang yongsheng cao Huijun Yang Yuan Gao Qi Li Xiuzhu Yu Engineering Research Center of Grain and Oil Functionalized Processing Universities of Shaanxi Province， College of Food Science and Engineering， Northwest A&F University Wilmar (Shanghai) Biotechnology Research & Development Center Co.Ltd Shaanxi Guanzhongyoufang Oil Co.， Ltd

Camellia oil， which contains a high content of triterpene alcohol， is known for a series of bioactivities including anti-inflammation. Amyrins are recognized as high bioactivity of anti-inflammation. However， no comparative study on triterpene alcohols from camellia oil. In this study， four high content triterpene alcohols from camellia oil， namely β-amyrin， ψ-taraxasterol， parkeol， and butyrospermol were evaluated through lipopolysaccharide induced RAW 264.7 cell inflammation. The results showed that butyrospermol exhibited the highest anti-inflammatory activity， surpassing that of β-amyrin. Characterization of signaling pathways showed that butyrospermol inhibited TLR4， NF-κB and MAPK pathways， suppressing the transcription of Tlr4， expression of p65， IκBα， ERK， JNK， and p38， and the phosphorylation of p65， IκBα， ERK， and p38. The anti-inflammatory effect of butyrospermol was further validated by phorbol 12-myristate 13-acetate induced mouse ear edema. The results in mouse showed that butyrospermol could inhibit the increase of TNF-α， IL-1β， p-JNK， p-p38， p-IκBα， and their corresponding mRNA levels. Our study provides new perspective on the anti-inflammatory role of different triterpene alcohols and explaining the bioactivity of camellia oil.

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碳达峰约束下电动汽车在线充电调度算法

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计算机科学 2024年第3期51卷 265-270页

作者：曹永胜刘洋王永全夏天华东政法大学智能科学与信息法学系上海201620 上海交通大学智慧法院研究院上海200240 上海第二工业大学计算机与信息工程学院上海201209

随着电动汽车数量的增加,电动汽车充电对社区电网总负荷和碳排放量产生了很大的影响,导致社区电网不太稳定,降低了电能质量。文中基于碳达峰的约束条件,研究了未提前知晓电动汽车到达时间、出发时间和充电需求等情况下的电动汽车充电碳... 详细信息

随着电动汽车数量的增加,电动汽车充电对社区电网总负荷和碳排放量产生了很大的影响,导致社区电网不太稳定,降低了电能质量。文中基于碳达峰的约束条件,研究了未提前知晓电动汽车到达时间、出发时间和充电需求等情况下的电动汽车充电碳排放问题。首先,建立了电动汽车充电碳排放问题,并在未来信息未知的情况下进行了研究。针对电动汽车充电行为的不确定性,提出了一种改进型演员-评论家的智能充电碳排放算法。该算法采用的是连续碳排放动作的电动汽车充电碳排放策略,而不是离散近似碳排放动作。仿真结果表明,相比OA和AEM两个基准算法,所提算法能够降低电动汽车预期成本约24.03%和21.49%。

关键词：碳达峰电动汽车不确定性在线充电能量管理

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锚固界面剪切力学特征及参数优化试验研究

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金属矿山 2024年第8期 35-44页

作者：田欣路燕泽陈彦亭于庆磊王社光曹永胜河北钢铁集团矿业有限公司河北唐山063000 河北钢铁集团沙河中关铁矿有限公司河北邢台054100 河北钢铁集团矿山设计有限公司河北唐山063000 河北省复杂铁矿低碳智能高效开采技术创新中心河北邢台054100 东北大学资源与土木工程学院辽宁沈阳110819

为加强软岩巷道支护性能,改善锚杆支护设计及其参数,针对锚固系统中界面力学特征以及失效破坏模式进行试验探究,并利用FLAC3D数值模拟方法,以锚固剂、锚固长度为研究参数,对围岩变形、锚杆受力以及塑性区分布规律进行分析、探究,确定科... 详细信息

为加强软岩巷道支护性能,改善锚杆支护设计及其参数,针对锚固系统中界面力学特征以及失效破坏模式进行试验探究,并利用FLAC3D数值模拟方法,以锚固剂、锚固长度为研究参数,对围岩变形、锚杆受力以及塑性区分布规律进行分析、探究,确定科学合理的软岩巷道支护参数。试验研究表明:钢筋—锚固剂界面剪切力学性能,随锚固剂由M20砂浆材料换为高纤维含量ECC-2%材料,其界面峰值剪切应力上涨了122%;当锚固剂—岩石界面黏结强度足够高时,影响其稳定性的主要因素即为岩石自身抗拉强度和内聚力;当采用锚固剂类型为ECC-2%且锚固长度为2.2 m的支护参数时,巷道顶板位移变形量、两帮位移、塑性区范围较优化前的方案分别降低了12.9%、29.15%、20.0%,锚杆最大轴力提高了95.5%。研究结果为软弱围岩支护参数的优化提供了科学依据,并且对于类似工程的支护设计和优化具有参考价值。

关键词：锚杆支护界面力学性能强化数值模拟

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Laparoscopic approach for intermittent hydronephrosis caused by primary ureteral fibroepithelial polyps in children

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World Journal of Pediatric Surgery 2021年第1期4卷 32-36页

作者： Han Chu yongsheng cao Qifei Deng Urology(II) Anhui Provincial Children's HospitalHefeiAnhuiChina

Objective To summarize the diagnosis and treatment experience of children with intermittent hydronephrosis caused by ureteral fibroepithelial polyp(UFP).Methods From 2017 to 2020,cases of hydronephrosis caused by ureteral polyp in Anhui Provincial Children’s Hospital were retrospectively enrolled for *** data,clinical manifestations,operation details,pathology and outcomes were collected from patients’medical data for *** All seven cases of UFP were boys,including six cases on the left side of the ureter and one case on the right side,at the median age of 7.1 years(3-14 years),with abdominal intermittent pain as the first *** cases underwent laparoscopic *** the operations were completed successfully;postoperative pathology indicated the presence of primary *** follow-ups of 1-30 months showed satisfactory recovery and relief from *** Laparoscopic pyeloureteroplasty or ureteroureterostomy is one of the optimal treatments for ureteral polyp at *** surgical method should be determined according to the number of polyps,the length and the diameter of the affected ureter,and also the status of renal function of the patients.

关键词： Laparoscopic diagnosis treatment

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Carrying Capacity and Coupling Coordination of Water and Land Resources Systems in Arid and Semi-arid Areas: A Case Study of Yulin City, China

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Chinese Geographical Science 2024年第5期34卷 931-950页

作者： ZHANG Qianxi cao Zhi WANG yongsheng HUANG Yijia Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

Quantitatively assessing the carrying capacity of water and land resources systems in arid and semi-arid areas is crucial for achieving the 2030 Sustainable Development *** this work,taking Yulin City in China as a case study and employing the Criteria Importance Through Intercriteria Correlation(CRITIC)method,a modified model of coupling degree was developed to evaluate the car-rying capacity of water and land resources systems endowment and utilization,as well as their coupling coordination degree from 2013 to *** findings indicate that the water and land resources of Yulin are diminishing due to declines in agriculture,higher industrial water use,and wetland ***,reallocating domestic water for ecological sustainability and reducing sloping farmland can mitigate this trend of ***,as the coupling coordination between water and land resources system endowment in Yulin continuously improved,the coupling coordination between water and land resources system utilization first decreased and then in-creased with 2016 as the turning ***,the carrying capacity of water and land resources systems,the coupling coordination degree between water and land resources system endowment,and the coupling coordination degree between water and land resources system utilization in Yulin exhibited the same pattern of being higher in the six northern counties than in the six southern *** the water resources endowment is vital for the highly efficient use of water and land resources.

关键词： water and land resources systems carrying capacity coupling coordination human-earth system sustainable development Yulin City,China

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A review of in situ carbon mineralization in basalt

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第4期16卷 1467-1485页

作者： Xiaomin cao Qi Li Liang Xu yongsheng Tan State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan 430071China University of Chinese Academy of Sciences Beijing 100049China

Global warming has greatly threatened the human living environment and carbon capture and storage(CCS)technology is recognized as a promising way to reduce carbon *** storage is considered a reliable option for long-term carbon *** rich in alkaline earth elements facilitates rapid and permanent CO_(2) fixation as ***,the complex CO_(2)-fluid-basalt interaction poses challenges for assessing carbon storage *** different reaction conditions,the carbonation products and carbonation rates *** mineralization reactions also induce petrophysical and mechanical responses,which have potential risks for the long-term injectivity and the carbon storage safety in basalt *** this paper,recent advances in carbon mineralization storage in basalt based on laboratory research are comprehensively *** assessment methods for carbon storage potential are introduced and the carbon trapping mechanisms are investigated with the identification of the controlling *** in pore structure,permeability and mechanical properties in both static reactions and reactive percolation experiments are also *** study could provide insight into challenges as well as perspectives for future research.

关键词： Carbon mineralization Basalt CO_(2)-fluid-basalt interaction Petrophysical evolution Mechanical response Carbon capture and storage(CCS)

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Performance Analysis of 112Gb/s×4-Channel WDM PDM-DQPSK Optical Label Switching System With Spectral Amplitude Code Labels

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Photonic Sensors 2017年第1期7卷 88-96页

作者： Isaac Adjaye ABOAGYE Fushen CHEN yongsheng cao Key Laboratory of Optical Fiber Sensing and Communications Ministry of Education School of Communication andInformation Engineering University of Electronic Science and Technology of China Chengdu 611731 China

We present the performance analysis of ll2Gb/s-4 wavelength division multiplexing （WDM） 100GHz channel spacing polarization division multiplexed-differential quadrature phase shift keying （PDM-DQPSK） optical label switching system with frequency swept coherent detected spectral amplitude code labels. Direct detection is chosen to demodulate the payload by applying a polarization tracker, while 4-bits of 156Mb/s spectral amplitude code label is coherently detected with a scheme of frequently-swept coherent detection. We optimize the payload laser linewidth as well as the frequency spacing between the payload and label. The label and payload signal performances are assessed by the eye-diagram opening factor （EOF） and bit-error rate （BER） at 10 9 as a function of the received optical power （ROP） and the optical signal to noise ratio （OSNR）. The payload could well be demodulated after 900 km at a bit error rate of 10-3 using forward error correction （FEC）.

关键词： Optical label switching (OLS) polarization division multiplexed (PDM) spectral amplitude code(SAC) wavelength division multiplexing (WDM)

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Inhibition of spore germination of Ulva pertusa by the marine bacterium Pseudoalteromonas haloplanktis CI4

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Acta Oceanologica Sinica 2010年第1期29卷 69-78页

作者： MA Yuexin LIU Pengliang ZHANG yongsheng cao Shanmao LI Dantong CHEN Wei Key Laboratory of Mariculture Ministry of Agriculture Dalian Fisheries University Dalian116023 China

The effect of the bacterial strain C14 on the germination of spores from the green alga Ulva pertusa was assayed and it was found that the bacterial biofilm and cell-free supernatant strongly inhibited spore germination. In attempts to define the chemical nature of she antifouling substance in the supernatant of C14, the culture supernatants were tested for activity after heat treatment, enzymatic treatments, size fractionation, and separation into aqueous and organic fractions. Results suggest that this bacterium produces an extracellular component with specific activity toward algal spores that was heat-sensitive and between 3 and 10 kDa in molecular size. The exposure of the organic phase fraction to spores showed inhibitive effect on spore germination. Pronase and carboxypeptidase y did not significantly affect the activity of inhibitory component, suggesting that the component was not a protein or a peptide. The bacterium C14 was identified as Pseudoalteromonas haloplanktis based on the phenotypic characters and 16S rRNA gene analvsis.

关键词： Pseudoaltcromonas antifouling bacterium Ulva pertusa biofouling anti-algal activity

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