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爬壁打磨机器人轻量化设计研究

机电工程 2017年第2期34卷 119-124页

作者：叶宇峰夏立项智蔡刚毅潘柏松浙江省特种设备检验研究院浙江杭州310020 浙江工业大学机械工程学院浙江杭州310014

针对大型容器焊缝及热影响区域人工打磨存在效率低、一致性差等问题,根据打磨工艺要求对打磨过程进行了打磨效果及影响因素分析等工艺研究,基于打磨工艺的研究结果对爬壁打磨机器人进行了功能和性能需求分析,建立了总功能图和具体功能... 详细信息

针对大型容器焊缝及热影响区域人工打磨存在效率低、一致性差等问题,根据打磨工艺要求对打磨过程进行了打磨效果及影响因素分析等工艺研究,基于打磨工艺的研究结果对爬壁打磨机器人进行了功能和性能需求分析,建立了总功能图和具体功能原理模型,通过对比分析各功能原理解确定了爬壁打磨机器人的结构方案,详细研究了爬壁打磨机器人的关键结构并进行了样机打磨试验。结果表明:空载转速4 000 r/min、正压力10 N为打磨工艺的最佳参数值;爬壁打磨机器人打磨效率为1.12 m2/h,打磨后壁面呈现镜面效果,粗糙度Ra≤25μm,达到了设计要求,具有较高的工程应用价值。

关键词：爬壁机器人大型压力容器打磨工艺打磨效果结构方案

Slope excavation quality assessment and excavated volume calculation in hydraulic projects based on laser scanning technology

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Water Science and Engineering 2015年第2期8卷 164-173页

作者： Chao Hu yi-hong Zhou Chun-ju Zhao zhi-guo pan School of Water Resources and Hydropower Engineering Wuhan University College of Hydraulic and Environmental Engineering China Three Gorges University Collaborative Innovation Center for Geo-Hazards and Eco-Environment in Three Gorges Area

Slope excavation is one of the most crucial steps in the construction of a hydraulic project. Excavation project quality assessment and excavated volume calculation are critical in construction management. The positioning of excavation projects using traditional instruments is inefficient and may cause error. To improve the efficiency and precision of calculation and assessment, three-dimensional laser scanning technology was used for slope excavation quality assessment. An efficient data acquisition, processing, and management workflow was presented in this study. Based on the quality control indices, including the average gradient, slope toe elevation, and overbreak and underbreak,cross-sectional quality assessment and holistic quality assessment methods were proposed to assess the slope excavation quality with laserscanned data. An algorithm was also presented to calculate the excavated volume with laser-scanned data. A field application and a laboratory experiment were carried out to verify the feasibility of these methods for excavation quality assessment and excavated volume calculation. The results show that the quality assessment indices can be obtained rapidly and accurately with design parameters and scanned data, and the results of holistic quality assessment are consistent with those of cross-sectional quality assessment. In addition, the time consumption in excavation quality assessment with the laser scanning technology can be reduced by 70%e90%, as compared with the traditional method. The excavated volume calculated with the scanned data only slightly differs from measured data, demonstrating the applicability of the excavated volume calculation method presented in this study.

关键词： Slope excavation Quality assessment Volume calculation Three-dimensional laser scanning technology

Imperative for long-term management and surveillance in Kawasaki disease

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World Journal of Clinical Cases 2025年第4期13卷 61-63页

作者： Yan pan Fu-Yong Jiao Department of Pediatrics The First Affiliated Hospital of Yangtze UniversityJingzhou 434000Hubei ProvinceChina Shaanxi Kawasaki Disease Diagnosis and Treatment Center Children’s HospitalShaanxi Provincial People’s Hospital of Xi’an Jiaotong UniversityXi’an 710000Shaanxi ProvinceChina

Kawasaki disease(KD)is a significant pediatric vasculitis known for its potential to cause severe coronary artery *** the effectiveness of initial treatments,such as intravenous immunoglobulin,KD patients can experience long-term cardiovascular issues,as evidenced by a recent case report of an adult who suffered a ST-segment elevation myocardial infarction due to previous KD in the World Journal of Clinical *** editorial emphasizes the critical need for long-term management and regular surveillance to prevent such *** drawing on recent research and case studies,we advocate for a structured approach to follow-up care that includes routine cardiac evaluations and preventive measures.

关键词： Kawasaki disease Long-term management Coronary artery aneurysm Surveillance Preventive care

Stiffness-tunable biomaterials provide a good extracellular matrix environment for axon growth and regeneration

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Neural Regeneration Research 2025年第5期20卷 1364-1376页

作者： Ronglin Han Lanxin Luo Caiyan Wei Yaru Qiao Jiming Xie Xianchao pan Juan Xing Department of Pathophysiology School of Basic Medical SciencesSouthwest Medical UniversityLuzhouSichuan ProvinceChina Department of Medicinal Chemistry School of PharmacySouthwest Medical UniversityLuzhouSichuan ProvinceChina

Neuronal growth, extension, branching, and formation of neural networks are markedly influenced by the extracellular matrix—a complex network composed of proteins and carbohydrates secreted by cells. In addition to providing physical support for cells, the extracellular matrix also conveys critical mechanical stiffness cues. During the development of the nervous system, extracellular matrix stiffness plays a central role in guiding neuronal growth, particularly in the context of axonal extension, which is crucial for the formation of neural networks. In neural tissue engineering, manipulation of biomaterial stiffness is a promising strategy to provide a permissive environment for the repair and regeneration of injured nervous tissue. Recent research has fine-tuned synthetic biomaterials to fabricate scaffolds that closely replicate the stiffness profiles observed in the nervous system. In this review, we highlight the molecular mechanisms by which extracellular matrix stiffness regulates axonal growth and regeneration. We highlight the progress made in the development of stiffness-tunable biomaterials to emulate in vivo extracellular matrix environments, with an emphasis on their application in neural repair and regeneration, along with a discussion of the current limitations and future prospects. The exploration and optimization of the stiffness-tunable biomaterials has the potential to markedly advance the development of neural tissue engineering.

关键词： alginate axon growth biomaterials extracellular matrix neural repair neurons neuroregeneration polyacrylamide polydimethylsiloxane stiffness

High Temperature Oxidation Resistance of 9Ni Steel

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Journal of Iron and Steel Research International 2014年第10期21卷 956-963页

作者： yi-zhi LIU Cai-fu YANG Feng CHAI Tao pan Hang SU Institute of Engineering Steel Central Iron and Steel Research Institute

Oxidation rates and scale/steel interface configuration of 9Ni steels were investigated at 1000--1 250 ℃ in air. The results revealed that Cu addition caused high temperature oxidation resistance to deteriorate. High tempera ture oxidation rates increased and scale/steel interface configuration became complicated due to Cu addition. Scale/ steel interface appeared to be network above certain temperature. Temperature required to form network scale/steel interface dropped more than 100 ℃ for 1.5% Cu-containing steel. （Fe,Ni,Cu）x Oy in inner oxidation layer dissocia ted to Fe-Ni-Cu phase and released active oxygen which can react with base steel easily. So the inner oxidation layer became the second source of oxidizing agent besides atmosphere. Internal stress at austenite grain boundary caused local oxide to fragment. So the scale/steel interface appeared to be network. Liquid Si-rich phase formed at sufficient ly high temperature. Penetration of the liquid Si-rich phase along austenite grain enhanced austenite grain oxidizing.

关键词： 9Ni steel high temperature oxidation scale/steel interface Thermo-Calc calculation

Use of polarization freedom beyond polarizationdivision multiplexing to support high-speed and spectral-efficient data transmission

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Light(Science & Applications) 2016年第1期5卷 259-265页

作者： zhi-Yu Chen Lian-Shan Yan Yan pan Lin Jiang An-Lin yi Wei pan Bin Luo Center for Information Photonics and Communications School of Information Science and TechnologySouthwest Jiaotong UniversityChengdu 610031China

Increasing the system capacity and spectral efficiency(SE)per unit bandwidth is one of the ultimate goals for data network designers,especially when using technologies compatible with current embedded fiber *** these,the polarizationdivision-multiplexing(PDM)scheme,which supports two independent data channels on a single wavelength with orthogonal polarization states,has become a standard one in most state-of-art telecommunication ***,however,only two polarization states(that is,PDM)can be used,setting a barrier for further SE *** by coherent detection and digital signal processing,we propose and experimentally demonstrate a scheme for pseudo-PDM of four states(PPDM-4)by manipulation of four linearly polarized data channels with the same *** any modification of the fiber link,we successfully transmit a 100-Gb s−1 PPDM-4 differential-phase-shift-keying signal over a 150-km single-mode fiber *** a method is expected to open new possibilities to fully explore the use of polarization freedom for capacity and SE improvement over existing fiber systems.

关键词： coherent detection optical communication pseudo-polarization-division multiplexing spectral efficiency

4d金属掺杂MoS_(2)改善对NO_(2)传感性能的机理研究

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原子与分子物理学报 2025年第2期42卷 175-181页

作者：潘一翠罗磊高鑫付岳牟芷瑶朱洪强冯庆重庆师范大学物理与电子工程学院重庆401331 重庆市光电功能材料重点实验室重庆401331

二硫化钼(MoS_(2))是一种热门的气体传感器材料.针对MoS_(2)与气体分子之间的弱相互作用问题,掺杂是一种有效的解决方式.本文利用基于密度泛函理论(DFT)的第一性原理平面波超软赝势计算方法,对二氧化氮(NO_(2))分子在4d金属掺杂后的MoS_... 详细信息

二硫化钼(MoS_(2))是一种热门的气体传感器材料.针对MoS_(2)与气体分子之间的弱相互作用问题,掺杂是一种有效的解决方式.本文利用基于密度泛函理论(DFT)的第一性原理平面波超软赝势计算方法,对二氧化氮(NO_(2))分子在4d金属掺杂后的MoS_(2)表面上吸附的微观机制进行了理论研究.研究结果表明:4d过渡金属元素掺杂有利于提高MoS_(2)吸附NO_(2)后的稳定性,且掺杂改变了材料表面的还原性,改善了其传感性能.掺入4d金属原子的材料禁带宽度显著减小,并且在费米能级附近形成了新的杂质峰,这大大提升了它的导电性.且掺杂原子的4d与5s轨道电子之间的协同作用会提升气体分子与材料之间的传感特性,这表明4d金属原子掺入MoS_(2)可以成为一种有效的NO_(2)传感器材料.本文的工作有助于寻求合适的化学掺杂的方法来提高MoS_(2)基气体传感器的性能.

关键词： MoS_(2) NO_(2) 吸附掺杂第一性原理计算

Seismic performance of HWBBF considering different design methods and structural heights

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Frontiers of Structural and Civil Engineering 2023年第12期17卷 1849-1870页

作者： Yulong FENG zhi ZHANG Zuanfeng pan School of Civil Engineering Hefei University of TechnologyHefei 230009China Thornton Tomasetti New YorkNY 10271USA College of Civil Engineering Tongji UniversityShanghai 200092China

Previous research has shown that using buckling-restrained braces(BRBs)at hinged wall(HW)base(HWBB)can effectively mitigate lateral deformation of steel moment-resisting frames(MRFs)in *** and displacement-based design methods have been proposed to design HWBB to strengthen steel MRF and this paper comprehensively compares these two design methods,in terms of design steps,advantages/disadvantages,and structure *** addition,this paper investigates the building height below which the HW seismic moment demand can be properly ***,3-story,9-story,and 20-story steel MRFs in the SAC project are used as benchmark steel ***,HWs and HWBBs are designed to strengthen the benchmark steel MRFs using force-based and displacement-based methods,called HWFs and HWBBFs,***,nonlinear time history analyses are conducted to compare the structural responses of the MRFs,HWBBFs and HWFs in *** results show the following.1)HW seismic force demands increase as structural height increases,which may lead to uneconomical HW *** HW seismic moment demand can be properly controlled when the building is lower than nine stories.2)The displacement-based design method is recommended due to the benefit of identifying unfeasible component dimensions during the design process,as well as better achieving the design target displacement.

关键词： hinged wall moment-resisting frame seismic design displacement-based design nonlinear time-history analysis

Robust Composite Separator Randomly Interwoven by PI and Pre-oxidized pan Nanofibers for High Performance Lithium-ion Batteries

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Chinese Journal of Polymer Science 2024年第11期42卷 1768-1779,I0012页

作者： ying Li Chen pan Feng Gan zhi-Xun Lin Jin-Chao Yu Zhen-Zhen Wei Yan Zhao College of Textile and Clothing Engineering National Engineering Laboratory for Modern SilkSoochow UniversitySuzhou215123China College of Textile Science and Engineering Wuyi UniversityJiangmen529020China

Electrospun nanofibrous separators,despite lacking superior mechanical strength,have gained widespread attention with high porosity and facile ***,utilizing the fact that thermal imidization temperature of poly(amic acid)(PAA)into polyimide(PI)coincides with the pre-oxidation temperature of polyacrylonitrile(pan)into carbon fiber,we proposed a new cross-electrospinning strategy to obtain a composite nanofibrous separator(PI/opan)randomly interwoven by PI and pre-oxidized pan(opan)nanofibers,via synchronously electrospinning the PAA and pan onto the same collector and then heat-treating for 2 h at 300℃.The resultant PI/opan separator was able to preserve high porosity(71.7%),electrolyte wettability and thermal stability of PI nanofibrous membrane,and surprisingly exhibited high mechanical strength,being 3 times of PI,which mainly because of the numerous adhesion points generated by the melting of pan in the pre-oxidation ***,the polar groups of opan and 3D fibrous network enhanced the PI/opan separator's ionic conductivity and Li+transference number,rendering the corresponding cell with more stable cycling performance than cells assembled with pure PI,pan or commercial PP ***,this work might provide a new avenue for the ongoing design and further development of LIB separators capable of high safety and high performance.

关键词： Lithium-ion battery Nanofibrous separator Cross-electrospinning Polyimide Pre-oxidized polyacrylonitrile