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Quality assessment of friction-stir-welded aluminum alloy welds via three-dimensional force signals

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Advances in Manufacturing 2024年第1期12卷 61-75页

作者： Ji-Hong Dong yi-ming huang Jia-Lei Zhu Wei Guan Xu-Kai Ren Huan-Wei Yu Lei Cui Beijing Institute of Petrochemical Technology Beijing102617People’s Republic of China Beijing Academy of Safety Engineering and Technology Beijing102617People’s Republic of China AVIC Manufacturing Technology Institute Beijing100024People’s Republic of China Tianjin Key Laboratory of Advanced Joining Technology School of Materials Science and EngineeringTianjin UniversityTianjin300350People’s Republic of China Shaoxing Special Equipment Testing Institute Shaoxing Key Laboratory of Special Equipment Intelligent Testing and EvaluationShaoxing312071ZhejiangPeople’s Republic of China

An online detection technology must be developed for realizing the real-time control of friction stir *** this study,the three-dimensional force exerted on a material during friction stir welding was collected synchronously and the relationship between the forces and welding quality was *** results indicated that the fluctuation period of the traverse force was equal to that of the lateral force during the stable welding *** phase difference between two horizontal forces wasπ/*** values of the horizontal forces increased with welding speed,whereas their amplitudes remained the *** proposed force model showed that the traverse and lateral forces conformed to an elliptical curve,and this result was consistent with the behavior of the measured *** variational mode decomposition was used to process the plunge *** intrinsic mode function that represented the real fluctuation in the plunge force varied at the same frequency as the spindle rotational *** tunnel defects occurred,the fluctuation period features were consistent with those obtained during normal welding,whereas the ratio parameter defined in this study increased significantly.

关键词： Friction stir welding(FSW) Three-dimensional force model Variational mode decomposition Tunnel defect

Building a dense surface map incrementally from semi-dense point cloud and RGB images

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Frontiers of Information Technology & Electronic Engineering 2015年第7期16卷 594-606页

作者： Qian-shan LI Rong XIONG Shoudong huang yi-ming huang State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou 310027 China Faculty of Engineering and Information Technology The University of Technology Sydney NSW 2007 Australia ZJU-UTS Joint Center on Robotics Zhejiang University Hangzhou 310027 China Department of Control Science and Engineering Zhejiang University Hangzhou 310027 China

Building and using maps is a fundamental issue for bionic robots in field applications. A dense surface map, which offers rich visual and geometric information, is an ideal representation of the environment for indoor/outdoor localization, navigation, and recognition tasks of these robots. Since most bionic robots can use only small light-weight laser scanners and cameras to acquire semi-dense point cloud and RGB images, we propose a method to generate a consistent and dense surface map from this kind of semi-dense point cloud and RGB images. The method contains two main steps：（1） generate a dense surface for every single scan of point cloud and its corresponding image（s） and （2） incrementally fuse the dense surface of a new scan into the whole map. In step （1） edge-aware resampling is realized by segmenting the scan of a point cloud in advance and resampling each sub-cloud separately. Noine within the scan is reduced and a dense surface is generated. In step （2） the average surface is estimated probabilistically and the non-coincidence of different scans is eliminated. Experiments demonstrate that our method works well in both indoor and outdoor semi-structured environments where there are regularly shaped objects.

关键词： Bionic robot Robotic mapping Surface fusion

Reconstructing the portal vein through a posterior pancreatic tunnel:New choice for portal vein thrombosis during liver transplantation

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World Journal of Gastrointestinal Surgery 2022年第10期14卷 1131-1140页

作者： Dong Zhao yi-ming huang Zi-ming Liang Kang-Jun Zhang Tai-Shi Fang Xu Yan Xin Jin yi Zhang Jian-Xin Tang Lin-Jie Xie Xin-Chen Zeng Department of Liver Surgery and Organ Transplantation Center The Third People’s Hospital of ShenzhenThe Second Affiliated Hospital of Southern University of Science and TechnologyNational Clinical Research Center for Infectious DiseaseShenzhen 518000Guangdong ProvinceChina

BACKGROUND Thrombectomy and anatomical anastomosis(TAA)has long been considered the optimal approach to portal vein thrombosis(PVT)in liver transplantation(LT).However,TAA and the current approach for non-physiological portal reconstructions are associated with a higher rate of complications and mortality in some *** To describe a new choice for reconstructing the portal vein through a posterior pancreatic tunnel(RPVPPT)to address cases of unresectable *** Between August 2019 and August 2021,245 adult LTs were ***-five(18.4%)patients were confirmed to have PVT before surgery,among which seven underwent PV reconstruction via the RPVPPT *** retrospectively analyzed the surgical procedure and postoperative complications of these seven recipients that underwent PV reconstruction due to *** During the procedure,PVT was found in all the seven cases with significant adhesion to the vascular wall and could not be *** portal vein proximal to the superior mesenteric vein was damaged in one case when attempting thrombolectomy,resulting in massive *** was successfully performed in all patients with a mean duration of 585 min(range 491-756 min)and mean intraoperative blood loss of 800 mL(range 500-3000 mL).Postoperative complications consisted of chylous leakage(n=3),insufficient portal venous flow to the graft(n=1),intra-abdominal hemorrhage(n=1),pulmonary infection(n=1),and perioperative death(n=1).The remaining six patients survived at 12-17 mo *** The RPVPPT technique might be a safe and effective surgical procedure during LT for complex ***,follow-up studies with large samples are still warranted due to the relatively small number of cases.

关键词： Liver transplantation Portal vein thrombosis Portal vein reconstruction Retropancreatic tunnel Computer tomography angiography Three-dimensional visualization

Push recovery for the standing under-actuated bipedal robot using the hip strategy

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Frontiers of Information Technology & Electronic Engineering 2015年第7期16卷 579-593页

作者： Chao LI Rong XIONG Qiu-guo ZHU Jun WU, Ya-liang WANG yi-ming huang State Key Laboratory of Industrial Control Technology & Institute of Cyber-Systems and Control Zhejiang University Hangzhou 310027 China

This paper presents a control algorithm for push recovery, which particularly focuses on the hip strategy when an external disturbance is applied on the body of a standing under-actuated biped. By analyzing a simplified dynamic model of a bipedal robot in the stance phase, it is found that horizontal stability can be maintained with a suitably controlled torque applied at the hip. However, errors in the angle or angular velocity of body posture may appear, due to the dynamic coupling of the transla- tional and rotational motions. To solve this problem, different hip strategies are discussed for two cases when （1） external dis- turbance is applied on the center of mass （CoM） and （2） external torque is acting around the CoM, and a universal hip strategy is derived for most disturbances. Moreover, three torque primitives for the hip, depending on the type of disturbance, are designed to achieve translational and rotational balance recovery simultaneously. Compared with closed-loop control, the advantage of the open-loop methods of torque primitives lies in rapid response and reasonable performance. Finally, simulation studies of the push recovery of a bipedal robot are presented to demonstrate the effectiveness of the proposed methods.

关键词： Push recovery Balance control Bipedal robot Hip strategy

Induced abortion in China and the advances of post abortion family planning service

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生殖医学杂志 2004年第Z1期13卷 53-58页

作者： Li ying Cheng yi-ming huang Na Guo Xin Wang Xian-mi Peking Union Medical College Beijing 100730China National Research Institute for Family Planning Beijing 100081 China Peking Union Medical College Beijing 100730China Peking Union Medical College Beijing 100730China Peking Union Medical College Beijing 100730China

This is a review of current situation of induced abortion and post abortion family planning service in China. Induced abortion is an important issue in reproductive health. This article reviewed the distribution of induced abortion in various time, areas, and population in China, and explored the character, reason, and harm to reproductive health of induced ***, this article introduces the concept of Quality of Care Program in Family Planning,and discusses how important and necessary it is to introduce Quality of Care Program in Family Planning to China.

关键词： Reproductive health Induced abortion Quality of care in family planning Post abortion family planning service

Identifying the dynamic behaviors in complete reconstruction of Co-based complex precatalysts during electrocatalytic oxygen evolution

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Journal of Energy Chemistry 2025年第1期100卷 226-233页

作者： Jingfang Zhang Danyang Wu Linke Cai Youluan Lu Fanpeng Cheng Lijuan Shi Qun yi Yao Liu yi huang Key Laboratory of Green Chemical Engineering Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Hubei Key Laboratory of Novel Reactor and Green Chemical Technology School of Chemical Engineering & Pharmacy Wuhan Institute of Technology Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction of Ministry of Education College of Chemistry Central China Normal University College of Materials Science and Engineering Fuzhou University

Transition metal-based nanomaterials have emerged as promising electrocatalysts for oxygen evolution reaction（OER）. Considerable research efforts have shown that self-reconstruction occurs on these nanomaterials under operating conditions of OER process. However, most of them undergo incomplete reconstruction with limited thickness of reconstruction layer, leading to low component utilization and arduous exploration of real catalytic mechanism. Herein, we identify the dynamic behaviors in complete reconstruction of Co-based complexes during OER. The hollow phytic acid（PA） cross-linked CoFe-based complex nanoboxes with porous nanowalls are designed because of their good electrolyte penetration and mass transport ability, in favor of the fast and complete reconstruction. A series of experiment characterizations demonstrate that the reconstruction process includes the fast substitution of PA by OH-to form Co（Fe）(OH)xand subsequent potential-driven oxidation to Co（Fe）OOH. The obtained CoFeOOH delivers a low overpotential of 290 mV at a current density of 10 mA cm-2and a long-term *** experiment results together with theory calculations reveal that the Fe incorporation can result in the electron rearrangement of reconstructed CoFeOOH and optimization of their electronic structure,accounting for the enhanced OER activity. The work provides new insights into complete reconstruction of metal-based complexes during OER and offers guidelines for rational design of high-performance electrocatalysts.

关键词： Complete reconstruction Co-based complex Precatalysts Oxygen evolution reaction

High vertical resolution analyses of gravity waves and turbulence at a mid-latitude station

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High vertical resolution analyses of gravity waves and turbu...

Radiosonde observations of lower atmosphere dynamics associated with gravity waves in middle latitudes

强化科技基础推进气象现代化——第29届中国气象学会年会

作者： Shao Dong ZHANG Fan yi Chun ming huang Kai ming huang School of Electronic Information,Wuhan University,Wuhan,Hubei,People’s Republic of China

We proposed a broad spectral data analyzing method to study the altitude and seasonal variability of gravity wave (GW) associated dynamics in the lower atmosphere at a mid-latitude by using the radiosonde data from Mi...

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Radiosonde observations of lower atmosphere dynamics associa...

浙江省产业结构分析——基于投入产出数据的研究

第28届中国气象学会年会

作者： Shao Dong ZHANG Fan yi Chun ming huang Kai ming huang School of Electronic Information, Wuhan University, Wuhan, Hubei, People’s Republic of China

We proposed a broad spectral data analyzing method to study the height and seasonal variability of gravity wave associated dynamics in the lower atmosphere in middle latitudes by using the radiosonde data at Miramar Nas

关键词： Radiosonde observations of lower atmosphere dynamics associated with gravity waves in middle latitudes

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特区经济 2011年第4期 49-50页

作者：甘敬义黄明和江西师范大学江西南昌330022

地区经济发展的过程就是产业结构不断升级的过程,国内学者也多从投入产出角度进行产业结构理论与实证的研究。本文通过利用浙江省3个年度投入产出表资料数据,分析研究了浙江省近几年产业演进现状,并通过比较分析为产业结构的调整优化提... 详细信息

地区经济发展的过程就是产业结构不断升级的过程,国内学者也多从投入产出角度进行产业结构理论与实证的研究。本文通过利用浙江省3个年度投入产出表资料数据,分析研究了浙江省近几年产业演进现状,并通过比较分析为产业结构的调整优化提出了相应建议。

关键词：产业结构产业关联投入产出