检索结果-内蒙古大学图书馆

19th IEEE International Conference on Automation Science and engineering, CASE 2023

作者： Qu, Tianci Xiong, Gang Ali, Hub dong, Xisong Han, Yunjun Shen, Zhen Institute of Automation Chinese Academy of Sciences The State Key Laboratory of Multimodal Artificial Intelligence Systems Beijing100190 China School of Artificial Intelligence University of Chinese Academy of Sciences Beijing100049 China Institute of Automation Chinese Academy of Sciences Beijing Engineering Research Center of Intelligent Systems and Technology Beijing100190 China Chinese Academy of Sciences Guangdong Engineering Research Center of 3D Printing and Intelligent Manufacturing Cloud Computing Center Dongguan523808 China Qingdao Academy of Intelligent Industries Qingdao266109 China

ISBN: (纸本)9798350320695

It is a challenge for USV navigation due to uncertainties and disturbances in the complex marine environment, which may lead to tilting or collision. However, current path planning methods for USVs lack dynamic environment adaptivity and timeliness. We formulate this problem as a Markov decision Process (MdP) and combine the advantages of dynamic Window Approach (dWA) and Safe Reinforcement Learning (RL) to solve it. First, the state encoding output by dWA is employed as observation to reduce the state dimension. Second, a safety-ensured reward function is designed to avoid collision areas. Then, the actor-critic network based on RL algorithm is used. Along with the RL training, the parameters in dWA is adaptively adjusted. Simulation experiments with dynamic waves and ocean currents demonstrate the adaptivity of our method, with avg. trajectory length decreased by 10%, avg. time cost decreased by 17%, and avg. speed increased by 18%, compared to the case using only dWA. © 2023 IEEE.

关键词： Reinforcement learning

来源：评论

学校读者我要写书评

暂无评论

Exceptional Strength of Mycelium-Bound Composite: A Sustainable Brick Alternative for Construction

Exceptional Strength of Mycelium-Bound Composite: A Sustaina...

引用

Symposium on Natural Fibers and Biocomposites: A Sustainable Solution, 2025, held as part of the TMS Annual Meeting and Exhibition, TMS 2025

作者： Sharma, deepak Le Ferrand, Hortense School of Mechanical and Aerospace Engineering Nanyang Technological University 50 Nanyang Avenue Singapore639798 Singapore School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore639798 Singapore Singapore Center for 3D Printing Nanyang Technology University 65 Nanyang Drive Singapore639798 Singapore Future Cities Laboratory Singapore ETH Centre 1 Create Way Create Tower #06-01 Singapore138602 Singapore

ISBN: (纸本)9783031811890

Mycelium-boundMycelium-bound compositescompositesComposite (MBCs) are grown by fungi onto waste lignocellulosic substrate and hence hold significant potential as sustainable materials. However, their wide range of adoption is limited by their typically low strength. Low strength in MBCs is due to the root-like networks of hyphae. The mycelium filaments loosely bind the organic structure, resulting in a porous and lightweight material that lacks the rigidity required for structural applications. This study develops a new method to fabricate MBCs. We use additive manufacturingAdditive manufacturing to fabricate porous triply periodic minimal surface (TPMS) scaffolds from wood-Poly Lactic Acid (PLA) material. The porous TPMS structure provides a higher surface area and a continuous supply of nutrition and oxygen for mycelium development. Mycelium from Ganoderma lucidum is grown on porous structures for 21 days. This study considers two types of TPMS structures: gyroid (G) and inverted wrapped package (IWP). The resultant MBCs showed exceptional strength of 14 MPa, comparable to clay bricks. A comparison between porous structure with and without mycelium showed a 1.27 times improvement in peak strength for the G structure and 1.30 times for the IWP structure at 50% relative density. Mycelium growth depends on the relative density of the organic porous structure, with a maximum mycelium density on 10% and a minimum on 50% porous structure, respectively. Furthermore, results showed mycelium growth is dependent on the design of the porous structure, which opens an avenue for advanced and engineered MBCs. © The Minerals, Metals & Materials Society 2025.

关键词： Brick

来源：评论

学校读者我要写书评

暂无评论

Microfluidic intestinal organoid-on-a-chip uncovers therapeutic targets by recapitulating oxygen dynamics of intestinal IR injury

引用

Bioactive Materials 2023年第12期30卷 1-14页

作者： Jinjian Huang Ziyan Xu Jiao Jiao Zongan Li Sicheng Li Ye Liu Ze Li Guiwen Qu Jie Wu Yun Zhao Kang Chen Jieshou Li Yichang Pan Xiuwen Wu Jianan Ren Research Institute of General Surgery Jinling HospitalSchool of MedicineSoutheast UniversityNanjing210009China School of Medicine Nanjing UniversityNanjing210093China Department of Rehabilitation The First Affiliated Hospital of Nanjing Medical UniversityNanjing210029China Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing NARI School of Electrical and Automation EngineeringNanjing Normal UniversityNanjing210042China General Clinical Research Center Nanjing Benq HospitalNanjing Medical UniversityNanjing210019China State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing211816China

Increasing evidence demonstrates that mammals have different reactions to hypoxia with varied oxygen dynamic *** takes~24 h for tri-gas incubator to achieve steady cell hypoxia,which fails to recapitulate ultrafast oxygen dynamics of intestinal ischemia/reperfusion(IR)*** from the structure of native intestinal villi,we engineered an intestinal organoid chip embedded with engineered artificial microvessels based on coaxial microfluidic technology by using pH-responsive ZIF-8/sodium alginate *** chip was featured on:(i)eight times the oxygen exchange efficiency compared with the conventional device,tri-gas incubator,(ii)implantation of intestinal organoid reproducing all types of intestinal epithelial cells,and(iii)bio-responsiveness to hypoxia and reoxygenation(HR)by presenting metabolism disorder,inflammatory reaction,and cell ***,it was found for the first time that Olfactomedin 4(Olfm4)was the most significantly downregulated gene under a rapid HR condition by sequencing the RNA from the ***,OLFM4 played protective functions on HR-induced cell inflammation and tissue damage by inhibiting the NF-kappa B signaling activation,thus it could be used as a therapeutic ***,this study overcomes the issue of mismatched oxygen dynamics between in vitro and in vivo,and sets an example of next-generation multisysteminteractive organoid chip for finding precise therapeutic targets of IR injury.

关键词： Ionic barrier of ZIF-8 Microfluidics Organoid-on-a-chip Oxygen dynamics Olfm4

来源：评论

学校读者我要写书评

暂无评论

Adaptive Layer Thickness and Lifting Force Control for Bottom Lighting LCd Based Additive Manufacturing

Adaptive Layer Thickness and Lifting Force Control for Botto...

引用

Annual Conference of Industrial Electronics Society

作者： Hong-Yi Xue Ming-Jong Tsai Han-Wei Wu Graduate Institute of Automation and Control National Taiwan University of Science and Technology High Speed 3D Printing Research Center National Taiwan University of Science and Technology Taipei Taiwan

To improve the printing efficiency of LCd Based Additive Manufacturing System, this study integrates adaptive layer thicknesses processing technique and adaptive lifting speed and position control during the printing process. Firstly, this study prints several samples with different thickness to find out the required curing time of the used resin. Secondly, some square samples with different slicing area are printed under different lifting speed and tensile stress force are recorded for analysis. The relationship between tension and lifting speed for different cross-sectional area can be modeled for the used material. Therefore, the lifting speed for different tensile forces and cross-sectional areas can be obtained by different shapes of objects. A safety factor is employed to obtained the maximum lifting force to improve the success rate of printing and save the printing time. A potentiometer is also equipped on the vertical axis for real-time monitoring the position and cooperates with a load cell to determine whether the printed object is separated from the bottom. In this study, a snowman-shaped object with different slopes is printed to demonstrate the benefit of adaptive layer thickness and the adaptive tension value with different lifting speed. The printing time can be reduced over 40% through the proposed method in which the layer thickness and lifting speed/position are adaptively controlled layer by layer.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Parallel Systems Framework: A Safe and Efficient Testbed for Unmanned Ships 4

Parallel Systems Framework: A Safe and Efficient Testbed for...

引用

4th IEEE International Conference on digital Twins and Parallel Intelligence, dTPI 2024

作者： Fu, Long Shen, Zhen dong, Xisong Han, Yunjun Yang, Shuguang Xiong, Gang Wang, Fei-Yue University of Chinese Academy of Sciences School of Artificial Intelligence Beijing100049 China Chinese Academy of Sciences State Key Laboratory of Multimodal Artificial Intelligence Systems Beijing Engineering Research Center of Intelligent Systems and Technology Institute of Automation Beijing100190 China Chinese Academy of Sciences Guangdong Engineering Center of 3D Printing and Intelligent Manufacturing Cloud Computing Center Dongguan523808 China Shandong Jiaotong University Schoool of Rail Transportation Jinan250399 China Chinese Academy of Sciences State Key Laboratory for Management and Control for Complex Systems Institute of Automation Beijing100190 China

ISBN: (纸本)9798350349252

In this study, unmanned ships test platform based on the parallel systems framework is proposed to improve the test efficiency and accuracy of unmanned ships in complex ocean environment. The parallel intelligence theory and ACP approach, the efficient interaction between virtual and real environment is achieved, which provides more comprehensive and accurate data for unmanned ships testing. Future research will further expand the scope of virtual environment simulation and improve systems accuracy and response speed to a wider range of unmanned ships test requirements. © 2024 IEEE.

关键词： Virtual environments

来源：评论

学校读者我要写书评

暂无评论

Correlation of parameters and microstructure of 3d printing bulk medical titanium-based metallic glass

引用

Materials Today: Proceedings 2022年 70卷 574-577页

作者： Liu, d.H. Peng, P.C. Kuo, C.N. Department of Materials and Optoelectronic Science National Sun Yat-Sen University Kaohsiung Taiwan Department of Bioinformatics and Medical Engineering Asia University Taichung 41354 Taiwan Graduate institute of biomedical sciences China Medical University Taichung 40402 Taiwan 3D Printing Medical Research Center China Medical University Hospital Taichung 40447 Taiwan

Metallic glass has developed over the past few decades. To fabricate the metallic glass, high cooling rates (105 K/s) is needed to form the disorder atomic structure [1]. Because metallic glass has no grain boundary, its characteristics are superior to traditional crystalline materials, such as good wear resistance, and excellent corrosion resistance [2]. In the past few decades, most amorphous alloy systems can only be manufactured to a millimeter size, causing the application difficulties [3]. due to development of 3d printing technology nowadays, it's expected to manufacture metallic glass in a larger size due to the localized melting process with a high cooling rate. due to the breakthrough in size, it can be applied to medical equipment such as scalpels, dental implants, and various implants in the future. However, the relationship between the materials, 3d printing process parameter, and microstructure evolution is still needed to be explored. Thus, in study, such relationship of Ti-based metallic glass is studied through changing parameters of scan speed and laser power to vary cooling rates and microstructure by Selective Laser Melting (SLM). The samples were examined through the X-ray diffractometer (XRd) and the scanning electron microscope (SEM) with energy disthispersive spectrometry (EdS). The composition variation and microstructure evolution during the 3d printing process was discussed in detail from the point of view of 3d printing parameter, molten pool behavior, and heat of mixing. Furthermore, the mechanical properties of metallic glass were investigated by using micro-indentation, which results showed further that the microstructure indirect effects hardness and young's modulus of the alloys. © 2022

关键词： Metallic glass

来源：评论

学校读者我要写书评

暂无评论

Application of Virtual Reality technology for fall protection in the AEC industry 1

Application of Virtual Reality technology for fall protectio...

引用

1st IEEE International Conference on Cognitive Aspects of Virtual Reality, CVR 2022

作者： Bakai, Nandor Etlinger, Jozsef Simon, dora Erika Norbert Racz, Viktor Rak, Oliver Balazs Zagoracz, Mark Hillebrand, Peter University of Pécs Bim Skills Lab Research Group Department of Engineering Studies Faculty of Engineering and Information Technology PécsH-7624 Hungary University of Pécs Bim Skills Lab Research Group 3D Printing and Visualisation Centre PécsH-7624 Hungary

The scope of this paper is to present the first results of an ongoing research and application development project investigating the potential applications of Virtual Reality in the field of fall protection focusing o... 详细信息

ISBN: (数字)9781665485166

ISBN: (纸本)9781665485166

关键词： Virtual reality

来源：评论

学校读者我要写书评

暂无评论

deformation Behavior and Microstructure Characterization of A357 Aluminum Alloy Welding Wires Used for Wire Arc Additive Manufacturing

SSRN

引用

SSRN 2023年

作者： Zheng, Tao Wang, Gaosong Shi, Hanchao Chen, Bingqing Ren, Xinyu Xiong, Huaping 3D Printing Research and Engineering Technology Center Beijing Institute of Aeronautical Materials Beijing100095 China Key Laboratory of Electromagnetic Processing of Materials Ministry of Education Northeastern University Shenyang110819 China

Microstructure and mechanical responses of A357 aluminum alloy welding wires after different degrees of strain were studied. It is found that the grains are elongated and refined along the drawing direction, accompanying with cell structures and sub-grains with strain increasing. Meanwhile, the main contributions to the fibrous texture are Cube, Goss and Copper, i.e., and textures. With the increase of drawing strain, the volume fraction of the Copper texture first increases and then decreases, while that of the Goss texture increases monotonously. The yield strength sharply increases at low drawing strain, after reaching the maximum value of 144.7MPa at the strain of 0.32 and it decreases slightly due to dynamic recrystallization. Interestingly, the elongation of the cold-drawn wires decreases steadily from 24.4 % to 2.3 % throughout the entire drawing process. In addition to the grain boundary strengthening and dislocation strengthening, the yield strength of the cold-drawn A357 wires is also impacted by the texture. Moreover, the fracture mode of the cold-drawn wires changes from typical ductile fracture to cleavage fracture during the drawing process. © 2023, The Authors. All rights reserved.

关键词： Textures

来源：评论

学校读者我要写书评

暂无评论

demonstration of Glass-based 3d Package Architectures with Embedded dies for High Performance Computing

Demonstration of Glass-based 3D Package Architectures with E...

引用

Electronic Components and technology Conference (ECTC)

作者： Siddharth Ravichandran Vanessa Smet Madhavan Swaminathan Rao Tummala 3D Systems Packaging Research Center School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta USA 3D Systems Packaging Research Center School of Mechanical Engineering Georgia Institute of Technology Atlanta USA 3D Systems Packaging Research Center School of Material Science and Engineering Georgia Institute of Technology Atlanta USA

This paper presents a technology demonstration of two novel 3d glass-based architectures for high performance computing applications. Current 3d technologies are limited by Through Silicon Vias (TSVs), and the proposed approached based on Glass Panel Embedding (GPE) eliminates TSVs resulting in a more robust 3d packaging platform that supports a variety of architectures. Two such architectures are designed and demonstrated in this paper. The first test vehicle shows multiple dies embedded and interconnected in a glass cavity, along with dies assembled on top using a microbump interface. The second test vehicle shows a 50x50 mm glass interposer package with 4 dies embedded in the core, 8 HBM emulators & 2 large SoCs assembled on top at 35 micron-bump pitch.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Plasmonic metafibers electro-optic modulators

引用

Light(Science & Applications) 2023年第9期12卷 1893-1901页

作者： Lei Zhang Xinyu Sun Hongyan Yu Niping deng Feng Qiu Jiyong Wang Min Qiu College of Information Science and Electronic Engineering Zhejiang UniversityHangzhou 310027China Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake University18 Shilongshan RoadHangzhou 310024 ZhejiangChina Institute of Advanced Technology Westlake Institute for Advanced Study18 Shilongshan RoadHangzhou 310024 ZhejiangChina College of Optical Science and Engineering Zhejiang UniversityHangzhou 310027China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China Ministry of Education Engineering Research Center of Smart Microsensors and Microsystems School of Electronics and InformationHangzhou Dianzi UniversityHangzhou 310018China

digitalizing optical signals through electric driving signals,electro-optic modulators(EOMs)are one of the cardinal elements in modern optical *** of current EOM devices are targeting on-chip integrations,which routinely suffer from high coupling losses,complex optical alignments and single-band *** this study,we for the first time integrate a lumped EOM device on the endfaces of a single-mode optical fiber jumper for fast amplitude *** from ultrathin and high quality-factor plasmonic metasurfaces,nanofabrication-friendly and highly efficient EO polymers and coupling-free connections with fiber networks,our EOM is demonstrated to allow dual-band operations(telecom O band and S band)and high-speed modulations(~1 GHz at a bias voltage of±9 V).This work offers an avenue to‘plug-and-play’implementations of EO devices and ultracompact“all-in-fibers”optical systems for communications,imaging,sensing and many others.

关键词： fiber fibers operations

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：