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现代制造技术与装备 2016年第1期52卷 8-10页

作者：马利云田毛提宋要斌李仁伟吕梁学院吕梁033001

对柱塞泵轴向摩擦副柱塞、转子、滑靴、配流盘等进行受力分析,根据工作要求和材料性能确定各部件的材料成分,并对不同材料的摩擦副部件在一定载荷条件下以以受力最大的情况做有限元分析与强度校核,确保这些摩擦副工作可靠。

关键词：受力分析材料有限元可靠性

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水镁石纤维-钢渣细骨料混凝土力学性能研究

非金属矿 2024年第4期47卷 35-38,44页

作者：赵有南闫人伟张太庆李芳芳翟新明毛楠孙子璇熊锐青海省果洛公路工程建设有限公司青海西宁810000 长安大学材料科学与工程学院陕西西安710061

为进一步提高钢渣利用率,降低环境污染,针对钢渣细骨料劣化混凝土力学性能现状,引入水镁石纤维,研究不同钢渣细骨料、水镁石纤维掺量对混凝土抗压及抗弯拉强度影响,探讨钢渣细骨料劣化混凝土性能机制,分析水镁石纤维对钢渣细骨料混凝土... 详细信息

为进一步提高钢渣利用率,降低环境污染,针对钢渣细骨料劣化混凝土力学性能现状,引入水镁石纤维,研究不同钢渣细骨料、水镁石纤维掺量对混凝土抗压及抗弯拉强度影响,探讨钢渣细骨料劣化混凝土性能机制,分析水镁石纤维对钢渣细骨料混凝土增强机理。结果表明,随着钢渣细骨料取代率逐步增加,混凝土坍落度下降,抗压强度及抗弯拉强度均不同程度降低。复掺水镁石纤维对钢渣细骨料混凝土的早期强度增强效果明显,与不掺水镁石纤维的30%钢渣混凝土相比,掺入30%钢渣细骨料与0.2%水镁石纤维,混凝土7 d抗压强度及抗弯拉强度分别提高15.75%、10.50%。水镁石纤维可以在水化产物间产生桥接作用,延缓裂纹发展。

关键词：混凝土钢渣细骨料水镁石纤维力学性能微观形貌

Expression of partial tandem duplication of mixed lineage leukaemia in patients with acute leukaemia and their relatives

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Chinese Medical Journal 2014年第2期127卷 284-289页

作者： He Yi Wang Dongning li Xudong Hu Yuan Wang Wenwen Huang renwei Department of Haematology Third Affiliated Hospital of Sun Yat-sen University Guangzhou Guangdong 510630 China

Background Partial tandem duplication of mixed lineage leukaemia （MLL-PTD） is detected both in patients with acute leukemia and in healthy ***,MLL-PTD in relatives of patients with MLL-PTD has not been *** objective of this study was to investigate the expression of MLL-PTD in patients with acute leukemia and in their *** The bone marrow or peripheral blood was collected from patients with acute leukaemia and their *** reverse transcription-polymerase chain reaction （RT-PCR） was applied to detect the mRNA expression of the MLL-PTD fused gene,and further confirm in genomic DNA *** Analysing MLL-PTD in case 1,the patient＇s older brother and his younger brother were positive,while his mother and his son were *** exon type in case 1 was e9/3 fusion,but in his older brother,it was e9/3 and e11/3 fusion,and in his younger brother,it was e9/3,e10/3,and e11/3 ***-PTD in case 2 was negative,but in the patient＇s older sister was positive,and the exon type was e9/3,e10/3,and e11/*** The expression of MLL-PTD was present in cases with acute leukaemia with a single expression ***,various expression types were detected in their healthy ***-PTD can couple with other chromosome aberrations,and its impact on disease prognosis remains to be studied further.

关键词： MLL-PTD leukaemia healthy population transplantation chromosome aberration

高密度电法和微动谱比法在青岛石湾沟水库渗漏探测中的应用

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华北地震科学 2024年第1期42卷 1-6页

作者：赵俐红田健刘英姿李建平牟斌辛志翔张金伟丁仁伟山东科技大学地球科学与工程学院山东青岛266590 青岛地质工程勘察院(青岛地质勘查开发局) 山东青岛266000 自然资源部滨海城市地下空间地质安全重点实验室山东青岛266000

以青岛市石湾沟水库为研究对象,采用高密度电法和微动谱比法对该水库东南部坝体进行联合探测,通过分析其高低阻转换的“畸变现象”和高低谱比值转换的小谱比值区域,找到渗漏的位置和规模,推测其渗透路径为一条走向约354°、宽度约20 m... 详细信息

以青岛市石湾沟水库为研究对象,采用高密度电法和微动谱比法对该水库东南部坝体进行联合探测,通过分析其高低阻转换的“畸变现象”和高低谱比值转换的小谱比值区域,找到渗漏的位置和规模,推测其渗透路径为一条走向约354°、宽度约20 m的断裂构造带。钻孔验证结果表明联合探测取得了较好的效果,为该水库后期防渗处理提供了可靠依据。

关键词：高密度电法微动谱比法水库渗漏联合探测

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TBM掘进煤矿深井巷道支护方案优化实践

科技资讯 2024年第14期22卷 103-107页

作者：张风林唐彬沈仁为李宏亮张鹏涛程晋轶刘震宇侯俊领安徽理工大学土木建筑学院安徽淮南232001 淮南矿业(集团)有限责任公司安徽淮南232001 攀枝花学院钒钛学院四川攀枝花617000

针对煤矿深井巷道TBM掘进施工中围岩支护方案少有规范可供参考,支护施工须同时兼顾支护强度和支护施工速度等问题,根据煤矿深部地层岩层物理力学性质和地应力场参数等工程地质条件,开展TBM掘进巷道数值模拟,获得不同支护方案下围岩应力... 详细信息

针对煤矿深井巷道TBM掘进施工中围岩支护方案少有规范可供参考,支护施工须同时兼顾支护强度和支护施工速度等问题,根据煤矿深部地层岩层物理力学性质和地应力场参数等工程地质条件,开展TBM掘进巷道数值模拟,获得不同支护方案下围岩应力场、位移场演化规律,优选合理支护方案,并在TBM掘进煤矿深井巷道工程实践中应用。工程现场监测数据表明,巷道开挖后第70天,顶板下沉量和两帮收敛量停止增加,锚杆轴力停止增长,所采用的支护方案满足巷道围岩稳定性控制的需要。

关键词：煤矿岩巷数值模拟支护方案现场监测

Influence of different parameters on numerical simulation of vertical-axis marine current turbine based on OpenFOAM

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排灌机械工程学报 2020年第4期38卷 365-371页

作者： JI renwei SHENG Qihu SUN Ke li Yan ZHANG Yuquan ZHANG liang College of Shipbuilding Engineering Harbin Engineering UniversityHarbinHeilongjiang 150001China Institute of Ocean Renewable Energy System Harbin Engineering UniversityHarbinHeilongjiang 150001China College of Energy and Electrical Engineering Hohai UniversityNanjingJiangsu 211100China

Using the PimpleDyMFoam solver in open-source computing software OpenFOAM,based on the SST k-ωturbulence model and PIMPLE algorithm,a numerical simulation method of vertical-axis marine current turbines(VMCTs)is proposed,and the calculated results are compared with the experimental *** results show that the numerical simulation method is *** with other commercial softwares,this method has the advantages of higher solution efficiency and greater *** to the needs of users,the solver can be built on the basis of original code,and the corresponding discrete method can be *** method can achieve optimization algorithms,save time and cost,***,the effects of different parameters(mesh density,time step,the selection of sidewall boundary conditions and inlet turbulence intensity)on numerical simulation of the VMCT are studied in *** findings summarize an effective CFD simulation strategy based on OpenFOAM and provide a valuable reference for future CFD simulations of VMCTs.

关键词： numerical simulation hydrodynamic characteristics vertical-axis marine current turbine OpenFOAM

Underwater Monitoring Networks Based on Cable-Structured Triboelectric Nanogenerators

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Research 2022年第2期2022卷 179-190页

作者： Yihan Zhang Yingying li renwei Cheng Shen Shen Jia Yi Xiao Peng Chuan Ning Kai Dong Zhong lin Wang CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and Sensor Beijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China CUSTech Institute of Technology WenzhouZhejiang 325024China School of Material Science and Engineering Georgia Institute of Technology AtlantaGA 30332USA

The importance ofocean exploration and underwater monitoring is becoming vital,due to the abundant biological,mineral energy,and other resources in the ***,a self-powered underwater cable-based triboelectric nanogenerator(TENG)is demonstrated for underwater monitoring of mechanical motion/triggering as wllas searching and rescuing inthe *** a novel double-layer winding method combined with ferroelectric polarization,a self-powered cable-structured sensor with a stable electrical output has been manufactured,which can accurately respond to a variety of external mechanical stimuli.A self-powered cable sensing network woven using smart cables can comprehensively transmit information,such as the plane osition anddivedhofasumersbeMorereiely,can analyzeitsdrtionfmovemnt,seedand pathaong w transmiting information such as the submersible's size and *** developed self-powered sensor based on the cable-based TENG not only has low cost and simple structure but also exhibits working accuracy and ***,the proposed work provides new ideas for future seabed exploration and ocean monitoring.

关键词： Cable polarization underwater

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船舶浮冰区回转运动一体化数值分析

中国造船 2023年第1期64卷 13-23页

作者：谢畅周利丁仕风刘仁伟江苏科技大学船海学院镇江212003

针对极地船舶浮冰区纯自航回转性能,以体积力代替螺旋桨,考虑船体、浮冰、流体、螺旋桨和舵等因素,采用计算流体力学(CFD)和离散元方法(DEM)进行浮冰区极地船冰载荷和回转运动性能求解,开展无冰水域、不同密集度浮冰水域的双桨双舵极地... 详细信息

针对极地船舶浮冰区纯自航回转性能,以体积力代替螺旋桨,考虑船体、浮冰、流体、螺旋桨和舵等因素,采用计算流体力学(CFD)和离散元方法(DEM)进行浮冰区极地船冰载荷和回转运动性能求解,开展无冰水域、不同密集度浮冰水域的双桨双舵极地船的回转运动数值模拟,分析极地船冰载荷和运动特性。极地船在55%密集度浮冰区的回转直径约为无冰水域的1.60倍,在75%密集度浮冰区的回转直径约为无冰水域的1.88倍。极地船与浮冰碰撞是随机的,船体在回转过程中所承受的载荷及运动特性具有随机性。

关键词： CFD-DEM耦合方法回转运动浮冰区极地船舶体积力密集度

Numerical Simulations of the Ice Load of a Ship Navigating in Level Ice Using Peridynamics

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Computer Modeling in Engineering & Sciences 2019年第11期121卷 523-550页

作者： Yanzhuo Xue renwei liu Yang liu lingdong Zeng Duanfeng Han College of Shipbuilding Engineering Harbin Engineering UniversityHarbin150001China

In this study,a numerical method was developed based on peridynamics to determine the ice loads for a ship navigating in level *** analysis of threedimensional ice specimen with tensile and compression loading are carried out *** effects of ice thickness,sailing speed,and ice properties on the mean ice loads were also *** is observed that the ice fragments resulting from the icebreaking process will interact with one another as well as with the water and ship *** ice fragments may rotate,collide,or slide along the ship hull,and these ice fragments will eventually drift away from the *** key characteristics of the icebreaking process can be obtained using the peridynamic model such as the dynamic generation of cracks in the ice sheet,propagation and accumulation of ice fragments,as well as collision,rotation,and sliding of the ice fragments along the ship *** simulation results obtained for the ice loads and icebreaking process were validated against those determined from the lindqvist empirical formula and there is good agreement between the results.

关键词： Peridynamics ice load level ice ship-ice interaction ice properties convergence

基于边界框重叠最大化的海上单目标实时跟踪方法

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中国造船 2023年第1期64卷 205-214页

作者：董文博周利刘仁伟丁仕风江苏科技大学船舶与海洋工程学院镇江212100

海上动态障碍物的识别与跟踪是智能船舶发展的关键技术之一。针对船舶航行的典型场景,提出了一种高精度实时的单目标跟踪方法。基于船舶跟踪专业数据集LMD-TShip,离线训练目标估计器,预测跟踪船只目标框和真实框之间的交并比(IoU),通过... 详细信息

海上动态障碍物的识别与跟踪是智能船舶发展的关键技术之一。针对船舶航行的典型场景,提出了一种高精度实时的单目标跟踪方法。基于船舶跟踪专业数据集LMD-TShip,离线训练目标估计器,预测跟踪船只目标框和真实框之间的交并比(IoU),通过在线训练获得一个目标分类器,从而提出目标位置跟踪的鲁棒性方法。在开源数据集上进行测试试验,结果显示,用该方法跟踪处理帧数可达35 s^(-1),平均跟踪精度和成功率分别高达90.8%和76.4%,相对于传统的多尺度搜索方法,分别提高了9.2%和11.2%,可为智能船舶及其船载设备的智能化发展提供技术支撑。

关键词：智能船舶边界框重叠最大化实时跟踪