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3D defect detection of connectors based on structured light

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Optoelectronics Letters 2021年第2期17卷 107-111页

作者： JI Yue CHEN yang SONG Li-mei yangYan-gang yang huai-dong Key Laboratory of Advanced Electrical Engineering and Energy Technology Tiangong UniversityTianjin 300387China School of Mechanical Engineering Tianjin University of Technology and EducationTianjin 300222China Department of Precision Instrument Tsinghua UniversityBeijing 100084China

In order to realize the rapid detection of three-dimensional defects of connectors, this paper proposes a method for detecting connector defects based on structured light. This method combines structured light with binocular stereo vision to obtain three-dimensional data for the connector. Point cloud registration is used to identify defects and decision trees are used to classify defects. The accuracy of the 3D reconstruction results in this paper is 0.01 mm, the registration accuracy of the point cloud reaches the sub-millimeter level, and the final defect classification accuracy is 94%. The experimental results prove the effectiveness of the proposed three-dimensional connector defect detection method in connector defect detection and classification.

关键词： defect connector light

Fast 3D reconstruction of dental cast model based on structured light

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Optoelectronics Letters 2018年第6期14卷 457-460页

作者： SONG Li-mei LIN Wen-wei yang Yan-gang ZHU Xin-jun GUO Qing-hua yang huai-dong Key Laboratory of Advanced Electrical Engineering and Energy Technology Tianjin Polytechnic University School of Mechanical Engineering Tianjin University of Technology and Education School of Electrical Computer and Telecommunications Engineering University of Wollongong Department of Precision Instrument Tsinghua University

To quickly obtain accurate 3D data of dental cast model, this paper proposes a 3D reconstruction method for dental cast model based on structured light. This method combines the structured light with the motor turntable to obtain a group of 3D data for the dental cast model from multiple angles, and automatically registers the dental 3D data from multiple angles through the ball calibration of turntable. Compared with the real data of the dental cast model, the maximum error of the 3D reconstruction results in this paper is 0.115 mm. The reconstruction time of this process is about 130s. The experimental results show that the method has high precision and high scanning speed for the 3D reconstruction of the dental cast model.

关键词： structured light dental cast model based 3D reconstruction

The Effects of Radiationon Crystal Transformationsof Poly（vinylidenefluoride）

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Chemical Research in Chinese Universities 1994年第3期10卷 197-201页

作者： ZHAO Zhu-di, yang huai, LANG Mei-dong and CHEN Xin-fang(Institute of Materiats Science , Jilin University, Changchun , 130023)

his paper covers the effects of γ-radiation on crystal transformations of Poly-(vinylidene fluoride)before and after drawing as well as during annealing *** results show that the drawing results in a drastic increase in both crystallinityalong the meridian direction and β-form crystal content for the irradiated *** the drawn samples were irradiated under appropriate dose and then annealedat 140℃ , transformation from β-form to a-form was subjected to an *** transformation mechanisms between the two types of crystals are discussed onthe basis of results of WAXD and DSC.

关键词： Poly(vinylidene fluoride) . γ-Irradiation. Drawing Annealing Crystaltransformation

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社会养老保险中隐性债务的双随机模型

系统工程学报 2005年第6期20卷 570-577,643页

作者：东明郭亚军杨怀东华南理工大学工商管理学院广东广州510640 东北大学工商管理学院辽宁沈阳110004

本文在利率与死亡率均为随机的背景下,对我国社会养老保险制度中的隐性债务进行分析.提出了两种方法,得到了养老金给付现值的期望值和方差,并对利率以Wiener过程建模,得到了期望值和方差的具体表达式.在实例中,采用Monte Carlo仿真的方... 详细信息

本文在利率与死亡率均为随机的背景下,对我国社会养老保险制度中的隐性债务进行分析.提出了两种方法,得到了养老金给付现值的期望值和方差,并对利率以Wiener过程建模,得到了期望值和方差的具体表达式.在实例中,采用Monte Carlo仿真的方法得到了养老金给付现值及其近似替代值的经验分布.

关键词：社会养老保险隐性债务精算 Monte Carlo仿真

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随机利率下社会养老保险隐性债务的精算分析

系统工程 2005年第5期23卷 55-60页

作者：东明郭亚军杨怀东东北大学工商管理学院辽宁沈阳110004

在利率与死亡率均为随机的背景下,对我国社会养老保险制度中的隐性债务进行分析,得到了养老金给付现值的期望值和方差,并对利率以Wiener过程建模,得到了期望值和方差的具体表达式。通过推导,得到了养老金给付现值的近似替代变量,采用Mon... 详细信息

在利率与死亡率均为随机的背景下,对我国社会养老保险制度中的隐性债务进行分析,得到了养老金给付现值的期望值和方差,并对利率以Wiener过程建模,得到了期望值和方差的具体表达式。通过推导,得到了养老金给付现值的近似替代变量,采用MonteCarlo仿真的方法,得到了养老金给付现值及其近似替代变量的经验分布。

关键词：社会养老保险隐性债务精算随机利率 Monte Carlo仿真

Force and impulse multi-sensor based on flexible gate dielectric field effect transistor

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 214-220页

作者： Chao Tan Junling Lü Chunchi Zhang dong Liang Lei yang Zegao Wang College of Materials Science and Engineering Sichuan UniversityChengdu 610065China The 54th Research Institute of China Electronics Technology Group Corporation Shijiazhuang 050081China

Nowadays,force sensors play an important role in industrial production,electronic information,medical health,and many other ***-dimensional material-based filed effect transistor(2D-FET)sensors are competitive with nano-level size,lower power consumption,and accurate ***,few of them has the capability of impulse detection which is a path function,expressing the cumulative effect of the force on the particle over a period of *** we fabricated the flexible polymethyl methacrylate(PMMA)gate dielectric MoS_(2)-FET for force and impulse sensor *** systematically investigated the responses of the sensor to constant force and varying forces,and achieved the conversion factors of the drain current signals(I_(ds))to the detected impulse(I).The applied force was detected and recorded by I_(ds)with a low power consumption of~30 *** sensitivity of the device can reach~8000%and the 4×1 sensor array is able to detect and locate the normal force applied on ***,there was almost no performance loss for the device as left in the air for two months.

关键词： flexible gate dielectric transistor force sensor impulse sensor force sensor array

嵌入前景理论的动态风险厌恶套期保值比率模型研究

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管理工程学报 2012年第2期26卷 101-105,93页

作者：杨怀东江超凡刘坤中南大学商学院湖南长沙410083 中国银行业监督管理委员会淄博监管分局山东淄博255000

本文从前景理论视角出发,并考虑风险厌恶的动态性,推导出了嵌入前景理论的动态风险厌恶套期保值比率计算公式。然后以2004年8月20日至2010年6月4日的铜现货与期货交易均价为样本进行实证分析。实证结果表明:空头套保者与多头套保者的风... 详细信息

本文从前景理论视角出发,并考虑风险厌恶的动态性,推导出了嵌入前景理论的动态风险厌恶套期保值比率计算公式。然后以2004年8月20日至2010年6月4日的铜现货与期货交易均价为样本进行实证分析。实证结果表明:空头套保者与多头套保者的风险厌恶水平是不同的,而且在不同市场环境下的风险厌恶水平也不同;不同市场环境和动态风险厌恶对套期保值比率来说是很重要的影响因素,在计算套期保值比率时我们有必要把它们考虑进来。

关键词：套期保值比率前景理论动态风险厌恶

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随机利率下保单组的准备金精算模型

系统工程理论方法应用 2005年第4期14卷 360-363页

作者：东明郭亚军杨怀东暨南大学经济学院广州510632 东北大学工商管理学院沈阳110004

针对同质寿险保单组,分别建立了确定利率与随机利率准备金精算模型。通过对比分析,发现保单数的增加会降低死亡率风险,但不会减小利率风险。对于平均未来损失额的近似值,给出了其前二阶矩的一般表达式,以及一个具体的利率模型下的表达式。

关键词：准备金保单组随机利率死亡率风险利率风险

Interaction of major facilitator superfamily domain containing 2A with the blood-brain barrier

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Neural Regeneration Research 2025年第8期20卷 2133-2152页

作者： Yilun Ma Taiwei dong Fei Luan Juanjuan yang Feng Miao Peifeng Wei College of Pharmacy and First Clinical Medical College Shaanxi University of Chinese MedicineXianyangShaanxi ProvinceChina National Drug Clinical Trial Agency The Second Affiliated Hospital of Shaanxi University of Chinese Medicine/Xixian New District Central HospitalXi′anShaanxi ProvinceChina

The functional and structural integrity of the blood-brain barrier is crucial in maintaining homeostasis in the brain microenvironment;however,the molecular mechanisms underlying the formation and function of the blood-brain barrier remain poorly *** major facilitator superfamily domain containing 2A has been identified as a key regulator of blood-brain barrier *** plays a critical role in promoting and maintaining the formation and functional stability of the blood-brain barrier,in addition to the transport of lipids,such as docosahexaenoic acid,across the blood-brain ***,an increasing number of studies have suggested that major facilitator superfamily domain containing 2A is involved in the molecular mechanisms of blood-brain barrier dysfunction in a variety of neurological diseases;however,little is known regarding the mechanisms by which major facilitator superfamily domain containing 2A affects the blood-brain *** paper provides a comprehensive and systematic review of the close relationship between major facilitator superfamily domain containing 2A proteins and the blood-brain barrier,including their basic structures and functions,cross-linking between major facilitator superfamily domain containing 2A and the blood-brain barrier,and the in-depth studies on lipid transport and the regulation of blood-brain barrier *** comprehensive systematic review contributes to an in-depth understanding of the important role of major facilitator superfamily domain containing 2A proteins in maintaining the structure and function of the blood-brain barrier and the research progress to *** will not only help to elucidate the pathogenesis of neurological diseases,improve the accuracy of laboratory diagnosis,and optimize clinical treatment strategies,but it may also play an important role in prognostic *** addition,the effects of major facilitator superfamily domain containing 2A on blood-brain barrier lea

关键词： blood-brain barrier(BBB) caveolin-1 central nervous system docosahexaenoic acid endothelial cells lysophosphatidylcholine major facilitator superfamily domain containing 2A(MFSD2A) transcytosis