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基于主动光源阵列的骨科机器人末端示踪装置

中国医学物理学杂志 2024年第2期41卷 220-226页

作者：冯逾鹏张杰杨兴海上海理工大学健康科学与工程学院上海200093 海军军医大学长征医院骨肿瘤科上海200003

为减少机械臂导航过程中示踪装置视线遮挡问题对手术的影响,研究一种多角度主动光源阵列的末端示踪装置,采用非支架式的机械结构,配合双目相机,实现对手术机械臂位置的感知。通过大小两个棱柱相互配合,组成多角度的光源阵列,实现对机械... 详细信息

为减少机械臂导航过程中示踪装置视线遮挡问题对手术的影响,研究一种多角度主动光源阵列的末端示踪装置,采用非支架式的机械结构,配合双目相机,实现对手术机械臂位置的感知。通过大小两个棱柱相互配合,组成多角度的光源阵列,实现对机械臂工具中心点的计算。通过COMSOL软件搭建简易模型,验证示踪装置信号使用范围;通过覆盖范围实验和静态定位实验证明装置的有效性和稳定性,可以满足手术机器人的任务要求。

关键词：主动光源手术机器人导航定位示踪装置

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Integrated Computational Materials Engineering for the Development and Design of High Modulus Al Alloys

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Journal of Beijing Institute of Technology 2023年第4期32卷 443-462页

作者： Chengpeng Xue xinghai yang Shuo Wang Junsheng Wang School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China

Integrated computational materials engineering(ICME)is to integrate multi-scale computational simulations and key experimental methods such as macroscopic,mesoscopic,and microscopic into the whole process of Al alloys design and development,which enables the design and development of Al alloys to upgrade from traditional empirical to the integration of compositionprocess-structure-mechanical property,thus greatly accelerating its development speed and reducing its development *** study combines calculation of phase diagram(CALPHAD),Finite element calculations,first principle calculations,and microstructure characterization methods to predict and regulate the formation and structure of composite precipitates from the design of highmodulus Al alloy compositions and optimize the casting process parameters to inhibit the formation of micropore defects in the casting process,and the final tensile strength of Al alloys reaches420 MPa and Young's modulus reaches more than 88 GPa,which achieves the design goal of the high strength and modulus Al alloys,and establishes a new mode of the design and development of the strength/modulus Al alloys.

关键词： integrated computational materials engineering(ICME) high modulus Al alloys

抗纤维蛋白溶解药物应用于儿童心脏外科手术的系统评价与Meta分析

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中国药师 2024年第7期27卷 1257-1264页

作者：王前梁星池杨星海刘俊华中科技大学同济医学院附属湖北省妇幼保健院外科武汉430070

目的系统评估抗纤维蛋白溶解药物在儿童心肺转流的心脏手术中的止血功效的有效性及安全性。方法系统性检索PubMed、Embase和The Cochrane Library数据库,搜集所有采用抗纤维蛋白溶解药物在儿童心肺转流的心脏外科手术中应用的随机对照试... 详细信息

目的系统评估抗纤维蛋白溶解药物在儿童心肺转流的心脏手术中的止血功效的有效性及安全性。方法系统性检索PubMed、Embase和The Cochrane Library数据库,搜集所有采用抗纤维蛋白溶解药物在儿童心肺转流的心脏外科手术中应用的随机对照试验(RCT),检索时间从1980年1月1日至2023年10月14日。采用RevMan 5.4软件进行Meta分析。结果共纳入20篇研究23个RCT,其中涉及抑肽酶9篇,氨甲环酸10篇,氨基己酸4篇。Meta分析结果显示,与对照组相比,所有使用抗纤维蛋白溶解药物(抑肽酶、氨甲环酸、氨基己酸)的试验组可显著降低术后24 h的出血量、输血量(P0.05)。结论抗纤维蛋白溶解药物在儿童心肺转流的心脏外科手术上具有止血作用。因相关的儿童研究证据较少,需进行大量的对比试验来评估这些药物相关的安全性以及适当的用药方案。

关键词：心脏手术体外循环抗纤维蛋白溶解药物抑肽酶氨甲环酸氨基己酸心肺转流止血安全性

Coalitional game based resource allocation in D2D-enabled V2V communication

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Journal of Systems Engineering and Electronics 2023年第6期34卷 1508-1519页

作者： MA Piming ZHAO Peng BAI Zhiquan DONG Xu yang xinghai KWAK Kyungsup Shandong Provincial Key Lab of Wireless Communication Technologies School of Information Science and EngineeringShandong UniversityQingdao 266237China School of Information Science and Technology Qingdao University of Science and TechnologyQingdao 266100China Graduate School of Information Technology and Telecommunications Inha UniversityIncheon 22212Korea

The joint resource block(RB)allocation and power optimization problem is studied to maximize the sum-rate of the vehicle-to-vehicle(V2V)links in the device-to-device(D2D)-enabled V2V communication system,where one feasible cellular user(FCU)can share its RB with multiple V2V *** problem is first formulated as a nonconvex mixed-integer nonlinear programming(MINLP)problem with constraint of the maximum interference power in the FCU *** the game theory,two coalition formation algorithms are proposed to accomplish V2V link partitioning and FCU selection,where the transferable utility functions are introduced to minimize the interference among the V2V links and the FCU links for the optimal RB *** successive convex approximation(SCA)is used to transform the original problem into a convex one and the Lagrangian dual method is further applied to obtain the optimal transmit power of the V2V ***,numerical results demonstrate the efficiency of the proposed resource allocation algorithm in terms of the system sum-rate.

关键词： coalitional game vehicle-to-vehicle(V2V)communication successive convex approximation(SCA) resource block(RB)allocation power allocation.

Achieving highest Young’s modulus in Al-Li by tracing the size and bonding evolution of Li-rich precipitates

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Journal of Materials Science & Technology 2023年第14期145卷 125-135页

作者： Chengpeng Xue Yuxuan Zhang Shuo Wang Guangyuan Tian xinghai yang Yubin Ke Zhenhua Xie Junsheng Wang School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China China Spallation Neutron Source Dongguan BranchInstitute of High Energy PhysicsChinese Academy of SciencesDongguan 523803China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China

For decades,it has been well accepted that every 1 wt.%Li addition to Al will reduce Al alloy’s density by 3%and increase its Young’s modulus by 6%.However,the fundamental mechanism of modulus improve-ments stays controversial though all studies agreed that the contribution of such a substantial boosting comes from Li-rich clusters either in solid solution or *** this study,we experimentally produce nano-sized Li-rich clusters by non-equilibrium solidification using centrifugal casting and trace their evolutions as a function of subsequent heat ***-resolution transmission electron mi-croscopy(HRTEM)reveals a further decrease in the lattice constants of Li-rich regions from the as-cast(0.406 nm),solid solution(0.405 nm)to the aged state(0.401 nm),while Young’s modulus of the Al-Li al-loy reaches 89.16 ***-angle neutron scattering(SANS)experiments and first-principle calculations based on density functional theory have shown both the bond strength around precipitates and the size of those Li-rich region dominate Young’s *** the beginning,it is volumetric compression due to Li addition that increases modulus,tightening the Al-Al potential *** the end,it is the Al-Al and Al-Li valence bonds in Al 3 Li at large size and high-volume fraction which increase its second derivative of internal energy and thus Young’s modulus.

关键词： Al-Li alloy Young’s modulus SANS HRTEM DFT Precipitate kinetics

Comparative Study on Wire-Arc Additive Manufacturing and Conventional Casting of Al–Si Alloys:Porosity,Microstructure and Mechanical Property

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Acta Metallurgica Sinica(English Letters) 2022年第3期35卷 475-485页

作者： Yueling Guo Qifei Han Jinlong Hu xinghai yang Pengcheng Mao Junsheng Wang Shaobo Sun Zhi He Jiping Lu Changmeng Liu School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Center for Micro and Nano Technologies Beijing Institute of TechnologyBeijing 100081China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China Beijing Hangxing Machinery Manufacturing Co. Ltd.Beijing 100013China

Here,we compare the porosity,microstructure and mechanical property of 4047 Al–Si alloys prepared by wire-arc additive manufacturing(WAAM)and conventional casting.X-ray microscopy reveals that WAAM causes a higher volume fraction of gas pores in comparison with conventional *** refi nements ofα-Al dendrites,eutectic Si particles and Ferich intermetallic compounds are achieved by WAAM,resulting from its rapid solidifi cation *** ultimate tensile strength(UTS,up to 205.6 MPa)and yield stress(YS,up to 98.0 MPa)are improved by WAAM at the expense of elongation after *** mechanical property anisotropy between scanning direction and build direction is minimal for alloys via *** microstructure refi nement and strength enhancement are enabled by increasing the travel speed of welding torch from 300 to 420 mm/min.

关键词： Wire-arc additive manufacturing Al–Si alloy Porosity Microstructure Strength

Biomedical rare-earth magnesium alloy:Current status and future prospects

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Journal of Magnesium and Alloys 2024年第4期12卷 1260-1282页

作者： Mingli yang Cheng Chen Dongsheng Wang Yinjin Shao Wenhao Zhou Cijun Shuai Youwen yang xinghai Ning Institute of Additive Manufacturing Jiangxi University of Science and TechnologyNanchang 330013China Key Laboratory of Construction Hydraulic Robots of Anhui Higher Education Institutes Tongling UniversityTongling 244061China Department of Rehabilitation Ganzhou People’s HospitalGanzhou 341099China Shaanxi Key Laboratory of Biomedical Metallic Materials Northwest Institute for Non-Ferrous Metal ResearchXi’an 710016China State Key Laboratory of High Performance Complex Manufacturing Central South UniversityChangsha 410083China School of Mechanical and Electrical Engineering Jiangxi University of Science and TechnologyGanzhou 341000China College of Engineering and Applied Science Nanjing University210089China

Biomedical magnesium(Mg)alloys have garnered significant attention because of their unique biodegradability,favorable biocompatibility,and suitable mechanical *** incorporation of rare earth(RE)elements,with their distinct physical and chemical properties,has greatly contributed to enhancing the mechanical performance,degradation behavior,and biological performance of biomedical Mg ***,a series of RE-Mg alloys are being designed and investigated for orthopedic implants and cardiovascular stents,achieving substantial and encouraging research *** this work,a comprehensive summary of the state-of-the-art in biomedical RE-Mg alloys is *** physiological effects and design standards of RE elements in biomedical Mg alloys are ***,the degradation behavior and mechanical properties,including their underlying action are studied ***,the preparation techniques and current application status of RE-Mg alloys are ***,we address the ongoing challenges and propose future prospects to guide the development of high-performance biomedical Mg-RE alloys.

关键词： Magnesium alloy Rare earth elements Biodegradation behavior Mechanical performance Biological properties

Transcriptome analysis reveals potential genes associated with plant height in rice

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BIOCELL 2023年第2期47卷 409-421页

作者： CAN CHEN RUI FENG ZONGQIONG ZHANG XIUZHONG XIA BAOXUAN NONG YU ZENG HUI GUO xinghai yang DANTING LI Guangxi Key Laboratory of Rice Genetics and Breeding Rice Research InstituteGuangxi Academy of Agricultural SciencesNanning530007China

Plant height(PH)is a complex trait regulated by the environment and multiple *** directly affects crop yield,harvest index,and lodging *** plant dwarf mutants,many genes related to PH have been identified and ***,the molecular mechanism of height regulation in high-culm rice mutants has not been well *** using transcriptome and weighted gene co-expression network analysis(WGCNA),we identified the differentially expressed genes(DEGs)between high-culm rice mutants(MUT)and wild-type(WT)and explored the key pathways and potential candidate genes involved in PH *** analysis identified a total of 2,184 DEGs,of which 1,317 were identified at the jointing stage and 1,512 were identified at the heading *** Encyclopedia of Genes and Genomes enrichment showed that the enrichment pathways were mainly involved in plant hormone signal transduction,ABC transportation,and steroid hormone *** these metabolic pathways,LOC_Os05g43910 and LOC_Os01g35030 were auxin(IAA)-related genes,up-regulated in MUT and LOC_Os02g08500(LEPTO1),LOC_Os11g04720,and LOC_Os12g04500 were cytokinin(CK)-related genes,downregulated in *** WGCNA identified four modules(light cyan,dark grey,grey,and pale turquoise)closely related to PH,and seven key genes were screened from these modules,of which two were up-regulated cell wallrelated genes(LOC_Os01g26174(OsWAK5),LOC_Os06g05050)in MUT,and one gibberellic acid(GA)gene(LOC_Os06g37364,OsKO2)was also *** genes might be closely related to PH *** findings help us better understand the transcriptional regulation of rice plant growth and development and provide a theoretical basis for mapping and cloning the PH regulatory genes.

关键词： Rice Plant height Transcriptome Weighted gene co-expression network analysis Differentially expressed gene

Enhanced wear prediction of tunnel boring machine disc cutters for accurate remaining useful life estimation using a hybrid model

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Frontiers of Structural and Civil Engineering 2024年第4期18卷 642-662页

作者： xinghai ZHOU Yakun ZHANG Guofang GONG Huayong yang Qiaosong CHEN Yuxi CHEN Zhixue SU The State Key Laboratory of Fluid Power&Mechatronic Systems Zhejiang UniversityHangzhou 310027China Guangzhou Rail Transit Construction Engineering Consulting Co. Ltd.Guangzhou 510000China China Railway Engineering Equipment Group Co. Ltd.Zhengzhou 450016China

In tunnel construction with tunnel boring machines(TBMs),accurate prediction of the remaining useful life(RUL)of disc cutters is critical for timely maintenance and replacement to avoid delays and cost *** paper introduces a novel hybrid model,integrating fundamental and data-driven approaches,to enhance wear prediction of TBM disc cutters and enable accurate RUL *** fundamental model is improved by incorporating composite wear mechanisms and load estimation techniques,showcasing superior prediction accuracy compared to single-mechanism ***,the hybrid model innovatively incorporates a data-driven supplementary residual term into the improved fundamental model,leading to a high-performance wear prediction *** actual field data from a highway tunnel project in Shenzhen,the performance of the hybrid model is rigorously tested and compared with pure fundamental and data-driven *** hybrid model outperforms the other models,achieving the highest accuracy in predicting TBM disc cutter wear(mean absolute error(MAE)=0.53,root mean square error(RMSE)=0.64).Furthermore,this study thoroughly analyzes the hybrid model’s generalization capability,revealing significant impacts of geological conditions on prediction *** model’s generalization capability is also improved by expanding and updating the data *** RUL estimation results provided by the hybrid model are straightforward and effective,making it a valuable tool by which construction staff can monitor TBM disc cutters.

关键词： tunnel boring machine disc cutter wear prediction remaining useful life field data hybrid model