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高载能超声骨刀的优化设计与性能评估

陕西师范大学学报（自然科学版） 2024年第2期52卷 1-7页

作者：姜兴刚邓康尹欣江培源北京航空航天大学机械工程及自动化学院北京100191 中国人民解放军总医院第四医学中心骨科医学部北京100048 中国航发贵阳发动机设计研究所贵州贵阳550081

针对超声骨刀在手术过程中切割效率低和产生骨组织热损伤的问题,设计了具有二级放大结构的高载能超声骨刀。基于驻波理论的等效长度法,结合有限元仿真对其二级放大结构进行设计和优化,测试了其振动性能并进行了骨切割试验。结果表明:具... 详细信息

针对超声骨刀在手术过程中切割效率低和产生骨组织热损伤的问题,设计了具有二级放大结构的高载能超声骨刀。基于驻波理论的等效长度法,结合有限元仿真对其二级放大结构进行设计和优化,测试了其振动性能并进行了骨切割试验。结果表明:具有二级放大结构的超声骨刀的谐振频率为23306 Hz,振幅为140μm,骨切割表面平整且无损伤,满足临床手术需求。

关键词：超声骨刀骨组织二级放大驻波理论有限元仿真

结直肠癌微卫星灶不稳定状态的影像学研究进展

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国际医学放射学杂志 2024年第1期47卷 74-78页

作者：邓康陈晓东(审校) 广东医科大学附属医院放射科湛江524000

结直肠癌的微卫星灶不稳定(MSI)状态对病人的治疗方式及预后有显著影响,基于CT、MRI及PET/CT的影像组学和深度学习能够发现其潜在的影像特征,并可以无创性预测结直肠癌MSI状态,为临床医生制定合适的治疗方案提供依据。就CT、MRI及PET/C... 详细信息

结直肠癌的微卫星灶不稳定(MSI)状态对病人的治疗方式及预后有显著影响,基于CT、MRI及PET/CT的影像组学和深度学习能够发现其潜在的影像特征,并可以无创性预测结直肠癌MSI状态,为临床医生制定合适的治疗方案提供依据。就CT、MRI及PET/CT预测结直肠癌MSI状态的研究进展予以综述。

关键词：结直肠癌微卫星灶不稳定免疫治疗影像组学深度学习

A Quadratic Triangular Finite Volume Element Method for a Semilinear Elliptic Equation

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Advances in Applied Mathematics and Mechanics 2017年第1期9卷 186-204页

作者： Zhiguang Xiong kang deng School of Mathematics and Computational Science Hunan University of Science and TechnologyXiangtanHunan 411201China

In this paper we extend the idea of interpolated coefficients for a semilinear problem to the quadratic triangular finite volume element *** first we introduce quadratic triangular finite volume element method with interpolated coefficients for a boundary value problem of semilinear elliptic *** we derive convergence estimate in H1-norm,L2-norm and L¥-norm,*** an example is given to illustrate the effectiveness of the proposed method.

关键词： Semilinear elliptic equation triangulation finite volume element with interpolated coefficients

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油罐车储罐裂纹应力强度因子影响因素研究

山东工业技术 2024年第1期 63-68页

作者：党鹏飞邓康茜沈阳化工大学机械与动力工程学院辽宁沈阳110142

针对油罐车储罐的安全问题,裂纹破坏尤为常见,张开型裂纹是其主要破坏形式。此外,储罐长期受到油体腐蚀作用,会产生大小各异的腐蚀坑。文章研究了影响油罐车裂纹应力强度因子的因素,分析了裂纹尺寸和腐蚀坑对储罐裂纹应力强度系数的影... 详细信息

针对油罐车储罐的安全问题,裂纹破坏尤为常见,张开型裂纹是其主要破坏形式。此外,储罐长期受到油体腐蚀作用,会产生大小各异的腐蚀坑。文章研究了影响油罐车裂纹应力强度因子的因素,分析了裂纹尺寸和腐蚀坑对储罐裂纹应力强度系数的影响规律。基于有限元扩展法,对含裂纹的油罐进行三维建模;利用相互作用积分法,对储罐裂纹的应力强度因子进行了求解。在考虑了腐蚀坑洞效应的基础上,分析应力强度因子受腐蚀坑尺寸影响的规律。结果显示,张开型裂纹的应力强度因子随裂纹尺寸的增加而增加;此外,腐蚀坑对应力强度因子也有比较明显的影响,腐蚀坑的深度和半径越大,应力强度因子越大。

关键词：张开型裂纹腐蚀坑应力强度因子储罐

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菱形立柱式半潜平台总体性能研究

舰船科学技术 2024年第10期46卷 109-114页

作者：邓小康谢文会李刚贾尚儒中海油研究总院有限责任公司北京100028

以菱形立柱式半潜平台为研究对象,首先通过对比数值结果与试验结果验证本文所采用的数值分析模型的正确性。在此基础上,对该新型半潜平台开展时域分析,研究在恶劣海况下平台的运动性能和系泊系统性能。最后,开展谱分析和敏感性分析以探... 详细信息

以菱形立柱式半潜平台为研究对象,首先通过对比数值结果与试验结果验证本文所采用的数值分析模型的正确性。在此基础上,对该新型半潜平台开展时域分析,研究在恶劣海况下平台的运动性能和系泊系统性能。最后,开展谱分析和敏感性分析以探究该新型半潜平台的水动力机理。研究表明,该新型半潜平台在恶劣海况下仍具有优异性能,可为南海深远海油气资源开发提供新思路。

关键词：半潜平台总体性能数值分析时域分析水动力机理

New algorithm of shape-finding of suspension bridge with spatial cables

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Theoretical & Applied Mechanics Letters 2023年第1期13卷 33-40页

作者： Xiao-kang deng Zhuo deng Xin Ren School of Automobile and Traffic Engineering Wuhan University of Science and TechnologyWuhan 430081China North China Branch of China Construction Eighth Engineering Bureau Co. Ltd.Tianjin300450China

A new algorithm is proposed to solve the problems of shape-finding of suspension bridge with spatial cables what include tedious iteration,slow convergence speed and even no convergent under some *** this paper,the stress analysis of the main cable is carried out,and the relationship between the slope change and the coordinate change is *** paper also discussed how to find the minimum slope point of symmetrical or asymmetric main cable,and the deformation compatibility equation is established and solved to obtain the shape of main *** algorithm in this paper can ensure the convergence of the solution for the suspension bridge with spatial *** calculation accuracy is high through the demonstration of the calculation examples.

关键词： Spatial cables Suspenders Shape-finding Slope of cable Coupling Unequal height main tower

Higher Order Triangular Mixed Finite Element Methods for Semilinear Quadratic Optimal Control Problems

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Numerical Mathematics(Theory,Methods and Applications) 2011年第2期4卷 180-196页

作者： kang deng Yanping Chen Zuliang Lu School of Mathematical Sciences Hunan University of Science and TechnologyXiangtan 411201P.R.China School of Mathematical Sciences South China Normal UniversityGuangzhou 510631P.R.China College of Mathematics and Computer Sciences Chongqing Three Gorges UniversityChongqing 404000P.R.China College of Civil Engineering and Mechanics Xiangtan UniversityXiangtan 411105P.R.China

In this paper,we investigate a priori error estimates for the quadratic optimal control problems governed by semilinear elliptic partial differential equations using higher order triangular mixed finite element *** state and the co-state are approximated by the order k Raviart-Thomas mixed finite element spaces and the control is approximated by piecewise polynomials of order k(k≥0).A priori error estimates for the mixed finite element approximation of semilinear control problems are ***,we present some numerical examples which confirm our theoretical results.

关键词： a priori error estimates semilinear optimal control problems higher order triangular elements mixed finite element methods

Multi-Purpose Forensics of Image Manipulations Using Residual-Based Feature

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Computers, Materials & Continua 2020年第12期65卷 2217-2231页

作者： Anjie Peng kang deng Shenghai Luo Hui Zeng Southwest University of Science and Technology Mianyang621010China Binghamton University State University of New YorkNewYork13902USA

The multi-purpose forensics is an important tool for forge image *** this paper,we propose a universal feature set for the multi-purpose forensics which is capable of simultaneously identifying several typical image manipulations,including spatial low-pass Gaussian blurring,median filtering,re-sampling,and JPEG *** eliminate the influences caused by diverse image contents on the effectiveness and robustness of the feature,a residual group which contains several high-pass filtered residuals is *** partial correlation coefficient is exploited from the residual group to purely measure neighborhood correlations in a linear *** that,we also combine autoregressive coefficient and transition probability to form the proposed composite feature which is used to measure how manipulations change the neighborhood relationships in both linear and non-linear *** a series of dimension reductions,the proposed feature set can accelerate the training and testing for the multi-purpose *** proposed feature set is then fed into a multi-classifier to train a multi-purpose *** results show that the proposed detector can identify several typical image manipulations,and is superior to the complicated deep CNN-based methods in terms of detection accuracy and time efficiency for JPEG compressed image with low resolution.

关键词： Digital image forensics partial correlation auto-regression multi-classification

Solidification structure of eutectic Al-Si alloy under a high magnetic field-aid-electromagnetic vibration

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Acta Metallurgica Sinica(English Letters) 2009年第3期22卷 191-196页

作者： Jianbo YU Zhongming REN Weili REN kang deng Yunbo ZHONG Department of Materials Science and Engineering Shanghai University Shanghai 200072 China

An electromagnetic vibration was generated by simultaneously imposing a strong static magnetic field （up to 10 T） and an alternative electricity current to the metal. Its effects on the solidification structure of eutectic Al-Si alloy have been investigated experimentally. It is found that the eutectic structure has been refined by solely imposing high magnetic field while it is coarsened under the electromagnetic vibration. Furthermore, polyhedral Si grains and non-dendritic α-Al appeared when the electromagnetic vibration strength was strong enough. The refining of eutectic structure is attributed to the decrease of diffusion coefficient caused by the strong magnetic field. The coarseness of eutectic structure may be attributed to the convection caused by electromagnetic vibration. Strong convection may break co-operative growth of eutectic phases to form polyhedral Si grains and non-dendritic α-Al.

关键词： Strong magnetic field Electromagnetic vibration Eutectic solidification Polyhedral Si Al-Si alloy