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Crack detection for wading-concrete structures using water irrigation and electric heating
《结构与土木工程前沿(英文)》 2023年 第17卷 第3期 页码 368-377 doi: 10.1007/s11709-022-0926-x
关键词: structural health monitoring underwater concrete structure fiber Bragg grating crack detection temperature tracer method
Optimizing the configuration of a clearwell by integrating pilot and full-scale tracer testing
LIU Wenjun, DU Zhipeng, JIN Junwei
《环境科学与工程前沿(英文)》 2007年 第1卷 第3期 页码 270-275 doi: 10.1007/s11783-007-0045-x
《机械工程前沿(英文)》 doi: 10.1007/s11465-021-0661-3
关键词: tool condition monitoring cutting temperature neural network learning rate adaption
王安全,程晓舫,陆少松
《中国工程科学》 2002年 第4卷 第8期 页码 54-57
介绍了彩色测温方法的基本原理,并基于可见光波段内光谱发射率的线性模型给出物体辐射颜色色品的表述;明确了一个色品最多只能求解出两个温度;解决了彩色测温方法中物体辐射色域的界定问题,并将辐射色域划分为温度单解域和双解域。
Performance of a bi-layer solar steam generation system working at a high-temperature of top surface
Jinxin ZHONG, Congliang HUANG
《能源前沿(英文)》 2023年 第17卷 第1期 页码 141-148 doi: 10.1007/s11708-021-0725-4
关键词: solar steam generation solar energy numerical method porous material
Room temperature preparation of hydrazine-linked covalent organic frameworks coated capillaries for
《化学科学与工程前沿(英文)》 2023年 第17卷 第5期 页码 548-556 doi: 10.1007/s11705-022-2252-1
关键词: hydrazine-linked TFPB-DHzDS in-situ growth method open-tubular capillary electrochromatography molecular simulations
Yang WANG, Baoming LI
《农业科学与工程前沿(英文)》 2020年 第7卷 第4期 页码 478-489 doi: 10.15302/J-FASE-2019289
The degree-day method is widely used to determine energy consumption but cannot be directly applied to poultry buildings without improvements in its accuracy. This study was designed to optimize the degree-day calculation and proposes a solar-air degree-day method, which can be used to calculate the cooling and heating degree-days and the annual cooling and heating loads under different climate conditions for poultry buildings. In this paper, the solar-air degree-day method was proposed, which considers the effects of solar radiation with different wall orientations and surface colors. Five Chinese cities, Harbin, Beijing, Chongqing, Kunming and Guangzhou, were selected to represent different climate zones to determine the solar-air degree-days. The heating and cooling energy requirements for different climates were compared by DeST (Designer’s Simulation Toolkit) simulation and the solar-air degree-day method. Approaches to decrease energy consumption were developed. The results showed that the maximum relative error was less than 10%, and the new method was not significantly different from the DeST simulation ( >0.05). The accuracy of calculating energy requirements was improved by the solar-air degree-day method in the different climate zones. Orientation and surface color effects on energy consumption need to be considered, and external walls of different orientations should have different surface colors.
关键词: base temperature energy consumption solar radiation orientation surface color
利用六氟化硫示踪技术预估不同年龄阶段的放牧荷斯坦奶牛甲烷排放量
Steven J. Morrison, Judith McBride, Alan W. Gordon, Alastair R. G. Wylie, 闫天海
《工程(英文)》 2017年 第3卷 第5期 页码 753-759 doi: 10.1016/J.ENG.2017.03.018
动物和日粮因素对牛肠道甲烷排放量影响的相关研究已经很普遍,但是关于放牧青年奶牛的甲烷排放量的可参考数据较少。本研究评估了荷斯坦奶牛在多年生黑麦草草地放牧时的生理状态对甲烷排放量的影响,分别进行了以下两个试验:试验1从2011年5月开始,为期11个星期,试验2从2011年8月开始,为期10个星期。在每个试验中,将荷斯坦奶牛分成三个处理组(每组12头),分别由小牛犊、一岁的母牛犊和妊娠母牛组成(平均年龄分别为8.5、14.5和20.5月龄)。在每个试验的最后一个星期利用六氟化硫示踪技术预估每头牛的甲烷排放量。干物质摄入量由代谢能需要量除以牧草中的代谢能含量计算而得。正如预期一样,活体重随年龄的增加而增加(P < 0.001),然而试验1中三个分组的体增重没有差异,试验2中的体增重随着年龄增加有不同程度的减少(P < 0.001)。在试验1中,妊娠母牛高于小牛犊的甲烷排放量(P < 0.001),而一岁母牛犊的甲烷排放量最高(g•d-1)。当用单位活体重、干物质摄入量和总能摄入量表示甲烷排放量时,一岁母牛犊比小牛犊和妊娠母牛的排放速率更高(P < 0.001)。在试验2中,甲烷排放量(g•d-1)随着年龄增加呈线性上升(P < 0.001),但是这种差异在一岁母牛犊和妊娠母牛中并不显著。妊娠母牛的甲烷/活体重的比值低于另外两组(P < 0.001),小牛犊的总能摄入量中甲烷能量输出的比值低于一岁母牛犊和妊娠母牛(P < 0.05)。根据所有数据建立甲烷排放量的预测方程。所有关系均为显著(P < 0.001),R²值的分布范围为0.630~0.682。这些模型表明:每增加1 kg活体重,甲烷排放量增加0.252 g•d-1;每增加1 kg•d-1干物质摄入量,甲烷排放量增加14.9 g•d-1;每增加1 MJ•d-1总能摄入量,甲烷能量输出增加0.046 MJ•d-1。当实际甲烷排放量不可测时,这些结果为我们提供了预估放牧母牛甲烷排放量的另一种方法。
A nano-scale alignment method for imprint lithography
WANG Li, LU Bing-heng, DING Yu-cheng, QIU Zhi-hui, LIU Hong-zhong
《机械工程前沿(英文)》 2006年 第1卷 第2期 页码 157-161 doi: 10.1007/s11465-006-0014-2
关键词: submicron alignment accuracy nano-scale alignment quadruple room-temperature
Thermal buckling behavior of laminated composite plates: a finite-element study
Houdayfa OUNIS,Abdelouahab TATI,Adel BENCHABANE
《机械工程前沿(英文)》 2014年 第9卷 第1期 页码 41-49 doi: 10.1007/s11465-014-0284-z
In this paper, the thermal buckling behavior of composite laminated plates under a uniform temperature distribution is studied. A finite element of four nodes and 32 degrees of freedom (DOF), previously developed for the bending and mechanical buckling of laminated composite plates, is extended to investigate the thermal buckling behavior of laminated composite plates. Based upon the classical plate theory, the present finite element is a combination of a linear isoparametric membrane element and a high precision rectangular Hermitian element. The numerical implementation of the present finite element allowed the comparison of the numerical obtained results with results obtained from the literature: 1) with element of the same order, 2) the first order shear deformation theory, 3) the high order shear deformation theory and 4) the three-dimensional solution. It was found that the obtained results were very close to the reference results and the proposed element offers a good convergence speed. Furthermore, a parametrical study was also conducted to investigate the effect of the anisotropy of composite materials on the critical buckling temperature of laminated plates. The study showed that: 1) the critical buckling temperature generally decreases with the increasing of the modulus ratio EL/ET and thermal expansion ratio αT/αL, and 2) the boundary conditions and the orientation angles significantly affect the critical buckling temperature of laminated plates.
关键词: thermal buckling laminated composite plates anisotropy critical buckling temperature finite-element method high precision rectangular Hermitian element
Modeling of semi-rigid beam-to-column steel joints under extreme loading
C FANG, B A IZZUDDIN, A Y ELGHAZOULI, D A NETHERCOT
《结构与土木工程前沿(英文)》 2013年 第7卷 第3期 页码 245-263 doi: 10.1007/s11709-013-0215-9
关键词: semi-rigid joint component method ductility elevated temperature
Emerging challenges to structural integrity technology for high-temperature applications
TU Shantung
《机械工程前沿(英文)》 2007年 第2卷 第4期 页码 375-387 doi: 10.1007/s11465-007-0066-y
关键词: manufacture aviation industry conversion petrochemical temperature
Phase separation time/temperature dependence of thermoplastics-modified thermosetting systems
ZHANG Xiujuan, XU Yuanze, YI Xiaosu
《化学科学与工程前沿(英文)》 2008年 第2卷 第3期 页码 276-285 doi: 10.1007/s11705-008-0057-5
关键词: separation time-temperature temperature dependency cure-induced separation activation temperature
Effects of temperature on pyrolysis products of oil sludge
LIU Jianguo, SONG Wei, NIE Yongfeng
《环境科学与工程前沿(英文)》 2008年 第2卷 第1期 页码 8-14 doi: 10.1007/s11783-008-0030-z
关键词: sludge treatment corresponding Temperature liquid process
陈刚毅,李跃清,侯凯
《中国工程科学》 2010年 第12卷 第3期 页码 33-38
利用GMS-5卫星遥感亮温(TBB)资料,按演化科学原理,对暴雨的发生、发展和消亡的过程物理学特征进行了数字化分析,并对武汉“98·7”暴雨进行了实例暴雨的细化预测,具有较强的实用性。
标题 作者 时间 类型 操作
Optimizing the configuration of a clearwell by integrating pilot and full-scale tracer testing
LIU Wenjun, DU Zhipeng, JIN Junwei
期刊论文
Real-time tool condition monitoring method based on temperature measurement and artificial neural network
期刊论文
Performance of a bi-layer solar steam generation system working at a high-temperature of top surface
Jinxin ZHONG, Congliang HUANG
期刊论文
Room temperature preparation of hydrazine-linked covalent organic frameworks coated capillaries for
期刊论文
An optimized solar-air degree-day method to evaluate energy demand for poultry buildings in different
Yang WANG, Baoming LI
期刊论文
利用六氟化硫示踪技术预估不同年龄阶段的放牧荷斯坦奶牛甲烷排放量
Steven J. Morrison, Judith McBride, Alan W. Gordon, Alastair R. G. Wylie, 闫天海
期刊论文
A nano-scale alignment method for imprint lithography
WANG Li, LU Bing-heng, DING Yu-cheng, QIU Zhi-hui, LIU Hong-zhong
期刊论文
Thermal buckling behavior of laminated composite plates: a finite-element study
Houdayfa OUNIS,Abdelouahab TATI,Adel BENCHABANE
期刊论文
Modeling of semi-rigid beam-to-column steel joints under extreme loading
C FANG, B A IZZUDDIN, A Y ELGHAZOULI, D A NETHERCOT
期刊论文
Emerging challenges to structural integrity technology for high-temperature applications
TU Shantung
期刊论文
Phase separation time/temperature dependence of thermoplastics-modified thermosetting systems
ZHANG Xiujuan, XU Yuanze, YI Xiaosu
期刊论文