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Research on an innovative structure of an open-ribbed steel-ultra-high performance concrete composite bridge deck

Frontiers of Structural and Civil Engineering 2024年第5期18卷 716-730页

作者： Xudong SHAO Xuan SUN Deqiang zou Junhui CAO Chuanqi YANG School of Civil Engineering Hunan UniversityKey Laboratory for Wind and Bridge Engineering of Hunan ProvinceChangsha 410082China China Construction Fifth Engineering Division Co. Ltd.Changsha 410004China

To completely solve the problem of fatigue cracking issue of orthotropic steel bridge decks(OSDs),the authors proposed a steel–ultra-high performance concrete(UHPC)lightweight composite deck(LWCD)with closed ribs in *** on the successful application of that LWCD,an adaptation incorporating an innovative composite deck structure,i.e.,the hot-rolled section steel–UHPC composite deck with open ribs(SSD)is proposed in this paper,aiming to simplify the fabrication process as well as to reduce the cost of *** on a long-span cable-stayed bridge,a design scheme is proposed and is compared with the conventional OSD ***,a finite element(FE)calculation is conducted to reflect both the global and local behavior of the SSD scheme,and it is found that the peaked stresses in the SSD components are less than the corresponding allowable values.A static test is performed for an SSD strip specimen to understand the anti-cracking behavior of the UHPC layer under negative bending *** static test results indicate that the UHPC layer exhibited a satisfactory tensile toughness,the UHPC tensile strength obtained from the test is 1.8 times the calculated stress by the FE model of the real *** addition,the fatigue stresses of typical fatigue-prone details in the SSD are calculated and evaluated,and the influences of key design parameters on the fatigue performance of the SSD are *** to the fatigue results,the peaked stress ranges for all of the 10 fatigue-prone details are within the corresponding constant amplitude fatigue *** a fatigue test is carried out for another SSD strip specimen to explore the fatigue behavior of the fillet weld between the longitudinal and transverse *** specimen failed at the fillet weld after equivalent 47.5 million cycles of loading under the design fatigue stress range,indicating that the fatigue performance of the SSD could meet the fatigue design *** calculations and experim

关键词： steel-ultra-high performance concrete composite deck open rib strip model test static and fatigue performance orthotropic steel deck

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Allosterically activating SHP2 by oleanolic acid inhibits STAT3-Th17 axis for ameliorating colitis

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Acta Pharmaceutica Sinica B 2024年第6期14卷 2598-2612页

作者： Jinbo Hu Wen Liu Yi zou Chenyang Jiao Jiazhen Zhu Qiang Xu Jianjun zou Yang Sun Wenjie Guo State Key Laboratory of Pharmaceutical Biotechnology Nanjing Drum Tower HospitalSchool of Life SciencesNanjing UniversityNanjing 210093China Department of Clinical Pharmacology Nanjing First HospitalNanjing Medical UniversityNanjing 210006China Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy Xuzhou Medical UniversityXuzhou 221004China

Src homology 2 domain-containing tyrosine phosphatase 2(SHP2)is an essential tyrosine phosphatase that is pivotal in regulating various cellular signaling pathways such as cell growth,differentiation,and *** activation of SHP2 has been shown to have a therapeutic effect in colitis and Parkinson's ***,the identification of SHP2 activators and a complete understanding of their mechanism is *** used a two-step screening assay to determine a novel allosteric activator of SHP2 that stabilizes it in an open *** acid was identified as a suitable *** binding to R362,K364,and K366 in the active center of the PTP domain,oleanolic acid maintained the active open state of SHP2,which facilitated the binding between SHP2 and its *** oleanolic acid-activated SHP2 hindered Th17 differentiation by disturbing the interaction between STAT3 and IL-6Rαand inhibiting the activation of ***,via the activation of SHP2 and subsequent attenuation of the STAT3-Th17 axis,oleanolic acid effectively mitigated colitis in *** protective effect was abrogated by SHP2 knockout or administration of the SHP2 inhibitor *** findings underscore the potential of oleanolic acid as a promising therapeutic agent for treating inflammatory bowel diseases.

关键词： Oleanolic acid SHP2 STAT3 Th17 Colitis Allosteric activator

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Ultimately Bounded Output Feedback Control for Networked Nonlinear Systems With Unreliable Communication Channel: A Buffer-Aided Strategy

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IEEE/CAA Journal of Automatica Sinica 2024年第7期11卷 1566-1578页

作者： Yuhan Zhang Zidong Wang Lei zou Yun Chen Guoping Lu the College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao 266590China IEEE the Department of Computer Science Brunel UniversityUB83PHUnited Kingdom the College of Information Science and Technology Donghua UniversityShanghai 201620 the Engineering Research Center of Digitalized Textile and Fashion Technology Ministry of EducationShanghai 201620China the School of Automation Hangzhou Dianzi UniversityHangzhou 310018China the School of Electrical Engineering Nantong UniversityNantong 226019China

This paper concerns ultimately bounded output-feedback control problems for networked systems with unknown nonlinear dynamics. Sensor-to-observer signal transmission is facilitated over networks that has communication *** transmissions are carried out over an unreliable communication channel. In order to enhance the utilization rate of measurement data, a buffer-aided strategy is novelly employed to store historical measurements when communication networks are inaccessible. Using the neural network technique, a novel observer-based controller is introduced to address effects of signal transmission behaviors and unknown nonlinear *** the application of stochastic analysis and Lyapunov stability, a joint framework is constructed for analyzing resultant system performance under the introduced controller. Subsequently, existence conditions for the desired output-feedback controller are delineated. The required parameters for the observerbased controller are then determined by resolving some specific matrix inequalities. Finally, a simulation example is showcased to confirm method efficacy.

关键词： Buffer-aided strategy neural networks nonlinear control output-feedback control unreliable communication channel

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基于逻辑回归的老年行人事故致伤因素研究

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公路交通科技 2023年第8期40卷 177-184页

作者：刘朱紫赵云龙邹铁方长沙民政职业技术学院湖南长沙410004 湖南省工程车辆安全性设计与可靠性技术重点实验室湖南长沙410114 长沙理工大学汽车与机械工程学院湖南长沙410114

为了更好地了解老年行人交通事故的特征以及致伤因素,通过网络渠道收集到了事故过程清晰并且完整的166例老年行人车辆碰撞事故视频,并采集了事故时间、地点、道路干湿度、车辆类型、车辆运动轨迹、行人运动学响应及损伤情况等事故信息。... 详细信息

为了更好地了解老年行人交通事故的特征以及致伤因素,通过网络渠道收集到了事故过程清晰并且完整的166例老年行人车辆碰撞事故视频,并采集了事故时间、地点、道路干湿度、车辆类型、车辆运动轨迹、行人运动学响应及损伤情况等事故信息。166例事故案例中,获得了105例老年行人轻伤、重伤以及死亡的损伤信息。依托所采集到的有效事故数据,通过统计、逻辑回归等方法进行了分析。结果表明:事故多发于白天的无人行道、路面干燥、光照充足处,轿车处于直行状态、车速集中在20~40 km/h,对于行人的碰撞位置主要为侧碰,但碾压事故亦占一定比例;老年行人多为男性、处于行走状态并且在事故中很少对碰撞做出反应;老年行人在通过道路中心线后的事故率明显降低,在未过道路中心线前碰撞发生在道路中部的概率最高;当老年行人头部首先触地时、超低车速(<20 km/h)下、驾驶员在碰撞发生前无反应时、碰撞发生在靠近人行道与/或道路两侧区域时、光照不充足时,更有可能发生重伤以上事故;在事故车辆左转弯过程中,由于冲突点过多及车辆A柱遮挡等导致的事故发生率明显高于车辆右转弯过程,车辆低速下的碾压也比较容易对老年行人造成严重的伤害。

关键词：交通工程事故致伤因素逻辑回归老年行人事故特征

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Recovery of cyanophycin granule polypeptide from activated sludge: carbon source dependence and aggregation-induced luminescence characteristics

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Frontiers of Environmental Science & Engineering 2024年第2期18卷 25-34页

作者： Kui zou Hongyuan Liu Bo Feng Taiping Qing Peng Zhang College of Environment and Resources Xiangtan UniversityXiangtan 411105China

In the sewage treatment process,facilitating the conversion of pollutants into value-added resources holds great potential for reducing the amount of greenhouse gas emissions and promoting economic *** granule polypeptide(CGP),a recently discovered high value-added biopolymer present in activated sludge,has provided new avenues for the recovery of ***,the mechanisms that regulate CGP synthesis and the characteristics of this biopolymer in activated sludge remain unclear thus *** study investigated the synthesis of CGP,polyhydroxyalkanoates(PHA),and alginate-like exopolysaccharides(ALE)in various microbial aggregates under different carbon sources feeding *** results showed that the CGP yields was superior that of PHA and ALE when subjected to identical carbon source feeding ***,biofilm was more conducive to CGP accumulation than floc *** with glucose and methanol,sodium acetate significantly enriched the CGP synthetase-encoding gene(cphAabundance=~17419),resulting in the highest CGP yield(average 107.1 mg/g MLSS)in both biofilm and floc *** study is the first to reported the characteristic fluorescence of CGP(Ex/Em=~360/450 nm)caused by the aggregated luminescence of arginine on the side ***,this study highlights the potential application of CGP as a fluorescent material and offers insights into CGP recovery from activated sludge in wastewater treatment plants.

关键词： Cyanophycin Polyhydroxyalkanoate Alginate-like exopolysaccharides Bioresource recovery Aggregation-induced luminescence

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四足机器人躯干重心稳定的变步长行走研究

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计算机仿真 2014年第12期31卷 339-345页

作者：王恒升邹铁庚中南大学机电工程学院湖南长沙410083 高性能复杂制造国家重点实验室湖南长沙410083

在机器人稳定性控制优化问题的研究中,四足机器人行走过程中躯干重心位置的波动是运动不平稳的一个重要原因,也会带来机器人的低能效比和机械寿命缩短等问题。为了解决上述问题,研究了四足机器人行走过程中保持重心稳定的方法,提出重心... 详细信息

在机器人稳定性控制优化问题的研究中,四足机器人行走过程中躯干重心位置的波动是运动不平稳的一个重要原因,也会带来机器人的低能效比和机械寿命缩短等问题。为了解决上述问题,研究了四足机器人行走过程中保持重心稳定的方法,提出重心无波动关节运动规划方法。从静止加速到指定速度的过程,速度的增加按S型曲线变化,保证重心的平稳加速;在恒速行走过程中,以躯干重心位置变化的加速度为零、足端在起脚和落脚位置的冲击为零作为约束条件,计算出四足机器人各关节的运动函数,保证了行走过程的重心平稳。机器人行走的步长在行走过程中动态计算,计算依据是保证整个行走过程中重心在水平面的投影始终在机器人支撑脚所在多边形范围之内,可进一步减小重心在垂向的波动。对所提方法进行了计算机仿真,运动规划及关节驱动函数在Matlab中实时解算,运动过程的程序控制采用Matlab的状态机技术,四足机器人行走的动力学过程用Adams实时计算。仿真过程中四足机器人行走平稳,实际重心曲线在横向和垂向的偏移波动极小,表明提方法对于重心的控制是有效的,为机器人稳定行走设计提供了依据。

关键词：四足机器人恒速慢步行走运动规划重心波动变行走步长

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论海德格尔的此在解释学

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长春市委党校学报 2001年第3期 12-15页

作者：邹铁军吉林大学哲学社会学院吉林长春130012

海德格尔运用现象学的方法，通过对此在存在的基本结构，从现身、领会以及此在与时间等几个方面的解析，从而建立了基础的存在论，也就是此在解释学。此在解释学的建立标志解释学进入了现代形态——哲学解释学。［

关键词：海德格尔现身领会言谈时间

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大型带式输送机的驱动与制动系统

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液压气动与密封 2010年第7期30卷 30-31页

作者：邹铁汉北京起重运输机械设计研究院北京100007

针对各类大型带式输送机的驱动与制动系统的配置进行分析,并对多方案进行比较。

关键词：大型带式输送机驱动系统制动系统

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Breeding maize of ideal plant architecture for high-density planting tolerance through modulating shade avoidance response and beyond

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Journal of Integrative Plant Biology 2024年第5期66卷 849-864页

作者： Fereshteh Jafari Baobao Wang Haiyang Wang Junjie zou Biotechnology Research Institute Chinese Academy of Agricultural SciencesBeijing 100081China Graduate School of Chinese Academy of Agricultural Sciences Beijing 100081China National Nanfan Research Institute CAASSanya 572025China State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources College of Life SciencesSouth China AgriculturalUniversityGuangzhou 510642China

Maize is a major staple crop widely used as food,animal feed,and raw materials in industrial ***-density planting is a major factor contributing to the continuous increase of maize ***,high planting density usually triggers a shade avoidance response and causes increased plant height and ear height,resulting in lodging and yield *** plant height and ear height,more erect leaf angle,reduced tassel branch number,earlier flowering,and strong root system architecture are five key morphological traits required for maize adaption to high-density *** this review,we summarize recent advances in deciphering the genetic and molecular mechanisms of maize involved in response to high-density *** also discuss some strategies for breeding advanced maize cultivars with superior performance under high-density planting conditions.

关键词： flowering time high-density planting leaf angle maize plant architecture plant height/ear height root architecture tasselbranch

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强夯法加固回填土地基工程实例分析

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山西建筑 2008年第6期34卷 137-138页

作者：邹铁军湖州市交通工程处

结合温州府东家园工程,对强夯法处理回填土地基技术要点进行了说明,详细介绍了具体强夯施工方案,并对强夯加固后的地基进行了静载荷试验,结果表明加固效果显著,且经济易行、施工便捷,值得推广使用。

关键词：强夯法回填土承载力稳定性地基

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