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Alexander BELYAEV,Alexander SUKHANOV,Alexander TSVETKOV
《机械工程前沿(英文)》 2016年 第11卷 第1期 页码 95-100 doi: 10.1007/s11465-016-0377-y
This article addresses the problem in which a chain falls from a glass from some height. This phenomenon demonstrates a paradoxical rise of the chain over the glass. To explain this effect, an initial hypothesis and an appropriate theory are proposed for calculating the steady fall parameters of the chain. For this purpose, the modified Сayley ’s problem of falling chain given its rise due to the centrifugal force of upward inertia is solved. Results show that the lift caused by an increase in linear density at the part of chain where it is being bent (the upper part) is due to the convergence of the chain balls to one another. The experiments confirm the obtained estimates of the lifting chain.
Andrew LOCKLEY
《工程管理前沿(英文)》 2019年 第6卷 第4期 页码 551-556 doi: 10.1007/s42524-019-0055-y
关键词: geoengineering Solar Radiation Management governance decentralised
潘家铮
《中国工程科学》 2002年 第4卷 第2期 页码 42-51
扼要总结了在1949至2000的50年间中国大陆取得的主要水利建设成就,分别从防洪、灌溉、供水、通航和水能利用等方面加以叙述,并反映到水利科学、技术、教育、管理方面的发展。分析了在取得成就的同时所发生的问题与缺点,探讨了近年来出现的一些新矛盾和新问题,主要有江河防洪标准仍然偏低,未形成可靠和完整的防洪体系;洪水位不断抬高,防汛负担与风险不断增加;水资源过度开发与严重浪费,水质广泛污染,水环境不断恶化以及水利工程配套不全,质量不高,管理粗放,经济效益低落等,并认为产生这些情况的主要因素是思想意识的片面和政策上应如何吸取教训,供决策层参考和全国人民思考。
S. SAMANTA, S. S. NANTHAKUMAR, R. K. ANNABATTULA, X. ZHUANG
《结构与土木工程前沿(英文)》 2019年 第13卷 第3期 页码 542-556 doi: 10.1007/s11709-018-0496-0
关键词: piezoelectricity impedance curve mode shapes inverse problem flaw detection curve shifting
Discussion on Problem-Based Engineering Management System
Qiao Xiang
《工程管理前沿(英文)》 2015年 第2卷 第3期 页码 249-260 doi: 10.15302/J-FEM-2015054
Airline planning and scheduling: Models and solution methodologies
Lei ZHOU, Zhe LIANG, Chun-An CHOU, Wanpracha Art CHAOVALITWONGSE
《工程管理前沿(英文)》 2020年 第7卷 第1期 页码 1-26 doi: 10.1007/s42524-020-0093-5
关键词: airline planning fleet assignment problem aircraft routing problem crew pairing problem crew rostering problem crew scheduling problem integrated planning
A solution to stochastic unit commitment problem for a wind-thermal system coordination
B. SARAVANAN,Shreya MISHRA,Debrupa NAG
《能源前沿(英文)》 2014年 第8卷 第2期 页码 192-200 doi: 10.1007/s11708-014-0306-x
关键词: unit commitment (UC) randomness wind generation univariate chance constrained
Solving unit commitment problem using a novel version of harmony search algorithm
Roozbeh MORSALI,Tohid JAFARI,Amirhossein GHODS,Mohammad KARIMI
《能源前沿(英文)》 2014年 第8卷 第3期 页码 297-304 doi: 10.1007/s11708-014-0309-7
关键词: generation scheduling harmony search (HS) algorithm intelligent technique unit commitment
Transient analysis of thermoelastic contact problem of disk brakes
Ali BELHOCINE, Mostefa BOUCHETARA
《机械工程前沿(英文)》 2013年 第8卷 第2期 页码 150-159 doi: 10.1007/s11465-013-0266-6
The main purpose of this study is to analyze the thermomechanical behavior of the dry contact between the brake disk and pads during the braking phase. The simulation strategy is based on computer code ANSYS11. The modeling of transient temperature in the disk is actually used to identify the factor of geometric design of the disk to install the ventilation system in vehicles. The thermal-structural analysis is then used with coupling to determine the deformation established and the Von Mises stresses in the disk, the contact pressure distribution in pads. The results are satisfactory compared to those found in the literature.
关键词: brake disks heat flux heat-transfer coefficient Von Mises stress contact pressure
A solution to the unit commitment problem—a review
B. SARAVANAN, Siddharth DAS, Surbhi SIKRI, D. P. KOTHARI
《能源前沿(英文)》 2013年 第7卷 第2期 页码 223-236 doi: 10.1007/s11708-013-0240-3
关键词: unit commitment (UC) optimization deterministic load stochastic load evolutionary programming (EP) hybrid
宁津生,罗志才,陈永奇
《中国工程科学》 2002年 第4卷 第7期 页码 23-28
确定厘米级大地水准面和发展超高阶地球重力场模型是现代物理大地测量的主要科学目标之一。卫星重力梯度测量的实现将为这一目标做出重大贡献。文章着重评述这一领域的研究进展,并讨论利用卫星重力梯度数据精化地球重力场的若干理论和方法问题。
关键词: 卫星重力梯度测量 卫星重力梯度边值问题 地球重力场模型 大地水准面
Hydrocele of the canal of Nuck — an old problem revisited
null
《医学前沿(英文)》 2013年 第7卷 第4期 页码 517-519 doi: 10.1007/s11684-013-0300-4
Herein the authors describe the case of a young woman presenting with a tender lump in her groin. Clinically the differential was of either a reactive lymph node or a femoral hernia. Ultrasound scan was urgently arranged and showed a cystic lesion. Surgical exploration was carried out and revealed this to be a hydrocele of the canal of Nuck. This was excised and the patient’s symptoms resolved and she was discharged home the following day. We explore the embryology, pathophysiology and management of this rare entity.
A solution to unit commitment problem using invasive weed optimization algorithm
B. SARAVANAN, E. R. VASUDEVAN, D. P. KOTHARI
《能源前沿(英文)》 2013年 第7卷 第4期 页码 487-494 doi: 10.1007/s11708-013-0279-1
关键词: Lagrangian relaxation (LR) invasive weed optimization (IWO) economic dispatch optimization fuel cost seed fitness
《机械工程前沿(英文)》 2022年 第17卷 第3期 doi: 10.1007/s11465-022-0689-z
关键词: surrogate model gas face seal fault diagnosis nonlinear dynamics tribology
标题 作者 时间 类型 操作
Distributed governance of Solar Radiation Management geoengineering: A possible solution to SRM’s “free-driver” problem?
Andrew LOCKLEY
期刊论文
Detection of void and metallic inclusion in 2D piezoelectric cantilever beam using impedance measurements
S. SAMANTA, S. S. NANTHAKUMAR, R. K. ANNABATTULA, X. ZHUANG
期刊论文
Airline planning and scheduling: Models and solution methodologies
Lei ZHOU, Zhe LIANG, Chun-An CHOU, Wanpracha Art CHAOVALITWONGSE
期刊论文
A solution to stochastic unit commitment problem for a wind-thermal system coordination
B. SARAVANAN,Shreya MISHRA,Debrupa NAG
期刊论文
Solving unit commitment problem using a novel version of harmony search algorithm
Roozbeh MORSALI,Tohid JAFARI,Amirhossein GHODS,Mohammad KARIMI
期刊论文
Transient analysis of thermoelastic contact problem of disk brakes
Ali BELHOCINE, Mostefa BOUCHETARA
期刊论文
A solution to the unit commitment problem—a review
B. SARAVANAN, Siddharth DAS, Surbhi SIKRI, D. P. KOTHARI
期刊论文
A solution to unit commitment problem using invasive weed optimization algorithm
B. SARAVANAN, E. R. VASUDEVAN, D. P. KOTHARI
期刊论文