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Fundamental frequency and testing mode of complicated elastic clamped-plate vibration
QI Hongyuan, GUAN Yiduo
《机械工程前沿(英文)》 2008年 第3卷 第4期 页码 360-364 doi: 10.1007/s11465-008-0084-4
关键词: multi-point excitation rectangle-plate single-point processing technology trigonometric interpolation
Sub-nanometer finishing of polycrystalline tin by inductively coupled plasma-assisted cutting
《机械工程前沿(英文)》 2023年 第18卷 第3期 doi: 10.1007/s11465-023-0751-5
关键词: plasma-assisted cutting polycrystalline tin single-point diamond turning surface roughness
Recent advancements in optical microstructure fabrication through glass molding process
Tianfeng ZHOU,Xiaohua LIU,Zhiqiang LIANG,Yang LIU,Jiaqing XIE,Xibin WANG
《机械工程前沿(英文)》 2017年 第12卷 第1期 页码 46-65 doi: 10.1007/s11465-017-0425-2
Optical microstructures are increasingly applied in several fields, such as optical systems, precision measurement, and microfluid chips. Microstructures include microgrooves, microprisms, and microlenses. This paper presents an overview of optical microstructure fabrication through glass molding and highlights the applications of optical microstructures in mold fabrication and glass molding. The glass-mold interface friction and adhesion are also discussed. Moreover, the latest advancements in glass molding technologies are detailed, including new mold materials and their fabrication methods, viscoelastic constitutive modeling of glass, and microstructure molding process, as well as ultrasonic vibration-assisted molding technology.
关键词: optical microstructure microgroove microlens glass molding process single-point diamond cutting
Alireza ARABHA NAJAFABADI, Farhad DANESHJOO, Hamid Reza AHMADI
《结构与土木工程前沿(英文)》 2020年 第14卷 第3期 页码 722-730 doi: 10.1007/s11709-020-0624-5
关键词: damage detection strain energy influence line complex bridges rotation displacement
Yanlin HAO, Yaobin TIAN, Jianxu WU, Yezhuo LI, Yan-An YAO
《机械工程前沿(英文)》 2020年 第15卷 第3期 页码 365-373 doi: 10.1007/s11465-020-0585-3
关键词: rolling locomotion expandable mechanism mechanism design zero moment point (ZMP) analysis
STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT
《农业科学与工程前沿(英文)》 2023年 第10卷 第4期 页码 503-509 doi: 10.15302/J-FASE-2023528
STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT
关键词: GREEN AGRICULTURAL PROMOTE POLLUTION SOURCE DEVELOPMENT POINT STRENGTHENING CONTROL
M. NAZEMIZADEH, H. N. RAHIMI, K. AMINI KHOIY
《机械工程前沿(英文)》 2012年 第7卷 第1期 页码 23-28 doi: 10.1007/s11465-012-0304-9
This paper presents an optimal control strategy for optimal trajectory planning of mobile robots by considering nonlinear dynamic model and nonholonomic constraints of the system. The nonholonomic constraints of the system are introduced by a nonintegrable set of differential equations which represent kinematic restriction on the motion. The Lagrange’s principle is employed to derive the nonlinear equations of the system. Then, the optimal path planning of the mobile robot is formulated as an optimal control problem. To set up the problem, the nonlinear equations of the system are assumed as constraints, and a minimum energy objective function is defined. To solve the problem, an indirect solution of the optimal control method is employed, and conditions of the optimality derived as a set of coupled nonlinear differential equations. The optimality equations are solved numerically, and various simulations are performed for a nonholonomic mobile robot to illustrate effectiveness of the proposed method.
关键词: mobile robot trajectory planning nonlinear dynamic optimal control
一种用于寻找无人船回收海床基数据最佳通信点的梯度上升控制法 Research Papers
Jiu-cai JIN, Jie ZHANG, Zhi-chao LV
《信息与电子工程前沿(英文)》 2019年 第20卷 第6期 页码 751-759 doi: 10.1631/FITEE.1700732
Crystallographic orientation effect on cutting-based single atomic layer removal
Wenkun XIE, Fengzhou FANG
《机械工程前沿(英文)》 2020年 第15卷 第4期 页码 631-644 doi: 10.1007/s11465-020-0599-x
关键词: ACSM single atomic layer removal mechanism crystallographic orientation effect mechanical cutting Manufacturing III
《机械工程前沿(英文)》 2022年 第17卷 第3期 doi: 10.1007/s11465-022-0695-1
关键词: translational parallel mechanism single loop multiple driving system workspace analysis singularity
《机械工程前沿(英文)》 2022年 第17卷 第3期 doi: 10.1007/s11465-022-0686-2
关键词: autonomous excavation unmanned electric shovel point cloud excavation trajectory planning
Room temperature liquid metal: its melting point, dominating mechanism and applications
Junheng FU, Chenglin ZHANG, Tianying LIU, Jing LIU
《能源前沿(英文)》 2020年 第14卷 第1期 页码 81-104 doi: 10.1007/s11708-019-0653-8
关键词: melting point liquid metal crystal thermodynamics molecular dynamics
Moving policy and regulation forward for single-use plastic alternatives
《环境科学与工程前沿(英文)》 2021年 第15卷 第3期 doi: 10.1007/s11783-021-1423-5
关键词: Single-use plastic alternatives Policy Regulation Sustainable development
《农业科学与工程前沿(英文)》 2023年 第10卷 第4期 页码 607-626 doi: 10.15302/J-FASE-2023517
As the common features of agroecosystems, ditches and ponds benefit the irrigation and drainage, as well as intercepting non-point source pollutants. However, most ditch-pond studies have been conducted in lowland areas. To test this source-sink assumption in upland areas, this study made observations on the ecological function of the ditch and pond system in a typical catchment in China. First, the changes in ponds in the catchment were analyzed using high-resolution remote sensing data. Then, the migration of agricultural pollutants in ditches and ponds were analyzed by field sampling and laboratory detection. The results showed that over the past 15 years the length of ditches in the catchment and the number of small ponds (< 500 m2) have increased by 32% and 75%, respectively. The rate of change in nutrient concentrations in the ditches and ponds were mostly from −20% to 20%, indicating ditches and ponds can be both sources and sinks for agricultural pollutants. Lastly, the contributing factors were explored and it was found that ditches and ponds are important sinks in dry season. However, during the rainy season, ditches and ponds become sources of pollutants, with the rapid drainage of ditches and the overflow of ponds in upland areas. The results of this study revealed that the ditches and ponds could be used for ecological engineering in upland catchments to balance drainage and intercept pollutants.
关键词: ditches ponds non-point source pollution mountainous areas nitrogen phosphorus
Chu-hua HUANG,Dong-ming LU,Chang-yu DIAO
《信息与电子工程前沿(英文)》 2016年 第17卷 第5期 页码 422-434 doi: 10.1631/FITEE.1500316
关键词: Multi-view video Free-viewpoint video Point-pair Multiscale-contour-based interpolation Spatio-temporal-contour Consistency Time-varying point cloud sequence
标题 作者 时间 类型 操作
Fundamental frequency and testing mode of complicated elastic clamped-plate vibration
QI Hongyuan, GUAN Yiduo
期刊论文
Recent advancements in optical microstructure fabrication through glass molding process
Tianfeng ZHOU,Xiaohua LIU,Zhiqiang LIANG,Yang LIU,Jiaqing XIE,Xibin WANG
期刊论文
Multiple damage detection in complex bridges based on strain energy extracted from single point measurement
Alireza ARABHA NAJAFABADI, Farhad DANESHJOO, Hamid Reza AHMADI
期刊论文
Design and locomotion analysis of two kinds of rolling expandable mobile linkages with a single degree
Yanlin HAO, Yaobin TIAN, Jianxu WU, Yezhuo LI, Yan-An YAO
期刊论文
Trajectory planning of mobile robots using indirect solution of optimal control method in generalized point-to-point
M. NAZEMIZADEH, H. N. RAHIMI, K. AMINI KHOIY
期刊论文
Crystallographic orientation effect on cutting-based single atomic layer removal
Wenkun XIE, Fengzhou FANG
期刊论文
Design and analysis of partially decoupled translational parallel mechanisms with single-loop structures
期刊论文
Toward autonomous mining: design and development of an unmanned electric shovel via point cloud-based
期刊论文
Room temperature liquid metal: its melting point, dominating mechanism and applications
Junheng FU, Chenglin ZHANG, Tianying LIU, Jing LIU
期刊论文
DITCHES AND PONDS CAN BE THE SOURCES OR SINKS OF NON-POINT SOURCE POLLUTION: OBSERVATIONS IN AN UPLAND
期刊论文