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《能源前沿(英文)》 2021年 第15卷 第3期 页码 781-790 doi: 10.1007/s11708-021-0782-8
关键词: bismuth ferrate ferroelectric polarisation photoelectrochemical (PEC) water splitting graphene oxide (GO) high orientation
Zhihua ZHANG,Huichen YU,Chengli DONG
《机械工程前沿(英文)》 2015年 第10卷 第4期 页码 418-423 doi: 10.1007/s11465-015-0362-x
Low cycle fatigue tests were conducted on the single crystal nickel-based superalloy, DD6, with different crystallographic orientations (i.e., [001], [011], and [111]) and strain dwell types (i.e., tensile, compressive, and balanced types) at a certain high temperature. Given the material anisotropy and mean stress, both orientation factor and stress range were introduced to the Smith, Watson, and Topper (SWT) stress model to predict the fatigue life. Experimental results indicated that the fatigue properties of DD6 depend on both crystallographic orientation and loading types. The fatigue life of the tensile, compressive, and balanced strain dwell tests are shorter than those of continuous cycling tests without strain dwell because of the important creep effect. The predicted results of the proposed modified SWT stress method agree well with the experimental data.
关键词: life prediction single crystal superalloy low cycle fatigue (LCF) crystallographic orientation strain dwell
Chung Nguyen VAN; Hai TRAN THANH; Thuc Nhu NGUYEN; Jianchun LI
《结构与土木工程前沿(英文)》 2022年 第16卷 第11期 页码 1424-1435 doi: 10.1007/s11709-022-0870-9
关键词: ECC fiber orientation distribution casting direction casting position
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
Ali ALAJMI, Hosny ABOU-ZIYAN, Hamad H. Al-MUTAIRI
《能源前沿(英文)》 2022年 第16卷 第4期 页码 629-650 doi: 10.1007/s11708-021-0799-z
关键词: parametric analysis high-performance window window-to-wall ratio (WWR) facade orientation solar shading cost analysis
Tomographic diagnosis of defects in hydraulic concrete structure
ZHAO Mingjie, XU Xibin
《结构与土木工程前沿(英文)》 2008年 第2卷 第3期 页码 226-232 doi: 10.1007/s11709-008-0027-5
关键词: satisfactory processing orientation tomographic diagnosis orientation perpendicular
Planar jumping with stable landing through foot orientation design and ankle joint control
Qilong YUAN, I-Ming CHEN
《机械工程前沿(英文)》 2012年 第7卷 第2期 页码 100-108 doi: 10.1007/s11465-012-0318-3
This paper introduces a method to generate the planar jumping motion for biped robot. In this work, through determining the upper body posture trajectory in the flight phase, the foot landing posture is made to be flat while landing. Together with properly designing the trajectory for local center of gravity and the foot landing velocity, the soft landing trajectory is generated. A controller on the ankle joint is added to avoid significant impact with the ground and stabilize the robot after landing. Jumping motion with stable landing is achieved in a dynamic simulation environment based on this method.
关键词: biped jumping stable landing control jumping motion generation
《机械工程前沿(英文)》 2023年 第18卷 第2期 doi: 10.1007/s11465-022-0737-8
关键词: selective laser melting (SLM) build orientation determination multi-feature mechanical part (MFMP) fuzzy analytical hierarchy process multi-objective decision making (MODM)
《结构与土木工程前沿(英文)》 页码 1357-1369 doi: 10.1007/s11709-023-0996-4
关键词: fiber orientation composite laminates stiffness degradation analytical approaches finite element analysis
一种静电纺具有超高分子链取向纳米纤维的通用策略 Article
文显, 熊健, 孙朝阳, 王黎明, 俞建勇, 覃小红
《工程(英文)》 2023年 第29卷 第10期 页码 179-187 doi: 10.1016/j.eng.2022.09.008
聚合物分子链取向度是决定纤维机械性质和物理性能的关键结构参数。然而,理解和大幅调控纤维大分子链取向仍面临巨大挑战。本文提出一种新型的静电纺丝方法,通过控制纺丝过程中的电场来有效调节分子链取向。与典型的静电纺丝相比,新型静电纺丝通过将电场施加在圆环上而非针头上来分离控制电场。得益于这一变化,实现了一种新的电场分布,从而产生非单调变化的牵伸作用力。结果表明,聚环氧乙烷(PEO)纳米纤维的大分子链取向得到显著改善,实现了超高红外二向色性比。与此同时,PEO射流细度可有效降低80%左右,纳米纤维直径从约298 nm降低至约114 nm。并且,与普通材料中高取向导致的高结晶度不同,该方法在提高纤维分子链取向度的同时使结晶度从74.9%显著降低至31.7%。这项工作为制备具有优化取向-结晶度特性的先进电纺纳米纤维提供了新的认识。
Management and Practice of Large-Scale Modern Coal Enterprises
An Wang
《工程管理前沿(英文)》 2014年 第1卷 第1期 页码 13-17 doi: 10.15302/J-FEM-2014004
关键词: coal industry sustainable development the four-orientation model
A Further Discussion on Trends in the Development of Advanced Manufacturing Technology
YANG Shu-zi, WU Bo, LI Bin
《机械工程前沿(英文)》 2006年 第1卷 第1期 页码 1-5 doi: 10.1007/s11465-005-0002-y
This paper is a supplement to Trends in the Development of Advanced Manufacturing Technology (Yang and Wu in Chin. J. Mech. Eng., 39: 73, 2003) but delves deeper into it. It first points out the strategic status of manufacturing industry in state development. Then, a detailed analysis is given on the features and trends in the development of advanced manufacturing technology in a total of 12 points from three aspects: precision, extreme, and culture from the aspect of the product itself; green, rapidness, saving, and efficiency during the manufacturing process; and digit, auto, integration, networking, and intelligence in view of the manufacturing method. In addition, it emphasizes that all the above aspects should be based on two base points: manufacture and machinery. Finally, it puts forth the guiding ideologies for the development of advanced manufacturing technology and the aspects China should give priority to in development, while stressing on the principles of independence, innovation and human orientation.
关键词: Development development integration networking orientation
A comprehensive review of greenhouse shapes and its applications
Ravinder Kumar SAHDEV,Ashwani Kumar DHINGRA,Mahesh KUMAR
《能源前沿(英文)》 2019年 第13卷 第3期 页码 427-438 doi: 10.1007/s11708-017-0464-8
关键词: greenhouse shapes drying solar energy agriculture products orientation
郭景学,姜晓燕,王文昌
《中国工程科学》 2012年 第14卷 第4期 页码 26-30
介绍了一种新型射孔完井技术——模块化电缆射孔工艺技术。它采用单芯电缆传输方式,首先将射孔器支撑装置锚定到预定深度,然后将射孔所需全部模块化射孔器分次下入井内,最后引爆射孔弹,从而达到多支射孔器分次下井、一次点火完成的目的。在此基础上,通过特殊的导向装置设计,实现电缆定方位射孔。它的优点是充分发挥了电缆传输方式动用设备少、作业方便、施工时间短等优势,又实现了部分油管输送射孔的功能,如全井负压射孔、防喷等。另外,在高压油气井射孔时,模块化射孔器可自动丢到井底,油气井直接生产,对高压油气不会产生截流。如果想起出
Research on constraint-based virtual assembly technologies
YANG Rundang, WU Dianliang, FAN Xiumin, YAN Juanqi
《机械工程前沿(英文)》 2007年 第2卷 第2期 页码 243-249 doi: 10.1007/s11465-007-0043-5
关键词: movement DOF recognition algorithm assembly orientation combination
标题 作者 时间 类型 操作
Spontaneous polarization enhanced bismuth ferrate photoelectrode: fabrication and boosted photoelectrochemical water splitting property
期刊论文
LCF behavior and life prediction method of a single crystal nickel-based superalloy at high temperature
Zhihua ZHANG,Huichen YU,Chengli DONG
期刊论文
Numerical investigation of the influence of casting techniques on fiber orientation distribution in ECC
Chung Nguyen VAN; Hai TRAN THANH; Thuc Nhu NGUYEN; Jianchun LI
期刊论文
Crystallographic orientation effect on cutting-based single atomic layer removal
Wenkun XIE, Fengzhou FANG
期刊论文
Reassessment of fenestration characteristics for residential buildings in hot climates: energy and economic analysis
Ali ALAJMI, Hosny ABOU-ZIYAN, Hamad H. Al-MUTAIRI
期刊论文
Planar jumping with stable landing through foot orientation design and ankle joint control
Qilong YUAN, I-Ming CHEN
期刊论文
Build orientation determination of multi-feature mechanical parts in selective laser melting via multi-objective
期刊论文
the mechanical performance and damage failure characteristics of laminated composites based on fiber orientation
期刊论文
A Further Discussion on Trends in the Development of Advanced Manufacturing Technology
YANG Shu-zi, WU Bo, LI Bin
期刊论文
A comprehensive review of greenhouse shapes and its applications
Ravinder Kumar SAHDEV,Ashwani Kumar DHINGRA,Mahesh KUMAR
期刊论文