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Jun WANG
《机械工程前沿(英文)》 2010年 第5卷 第1期 页码 19-32 doi: 10.1007/s11465-009-0082-1
关键词: abrasive waterjet engineering ceramics depth of cut cutting performance nozzle oscillation machining
Piezoelectric diffuser/nozzle micropump with double pump chambers
WANG Wei, ZHANG Ying, TIAN Li, CHEN Xiaojie, LIU Xiaowei
《机械工程前沿(英文)》 2008年 第3卷 第4期 页码 449-453 doi: 10.1007/s11465-008-0076-4
关键词: diffuser/nozzle Si/Glass phenomenon rectification diffuser/nozzle micropump frequency
Experimental and CFD analysis of nozzle position of subsonic ejector
Xilai ZHANG, Shiping JIN, Suyi HUANG, Guoqing TIAN
《能源前沿(英文)》 2009年 第3卷 第2期 页码 167-174 doi: 10.1007/s11708-009-0001-5
Influence of nozzle height to width ratio on ignition and NO
Liutao SUN, Yonghong YAN, Rui SUN, Zhengkang PENG, Chunli XING, Jiangquan WU
《能源前沿(英文)》 2021年 第15卷 第2期 页码 431-448 doi: 10.1007/s11708-021-0726-3
关键词: rectangular jet burner nozzle height to width ratio ignition characteristics pyrolyzed semicoke (SC) and bituminous blend NOx formation
Numerical analysis of strongly nonlinear oscillation systems using He’s max-min method
H. BABAZADEH, G. DOMAIRRY, A. BARARI, R. AZAMI, A. G. DAVODI
《机械工程前沿(英文)》 2011年 第6卷 第4期 页码 435-441 doi: 10.1007/s11465-011-0243-x
Nonlinear functions are crucial points and terms in engineering problems. Actual and physical problems can be solved by solving and processing such functions. Thus, most scientists and engineers focus on solving these equations. This paper presents a novel method called the max-min method for presenting an accurate approximate analytical solution to strong nonlinear oscillators. It can solve many linear or nonlinear differential equations without the tangible restriction of sensitivity to the degree of the nonlinear term. It is also quite convenient due to the reduction in the size of calculations. The algorithm suggests a promising approach and is systematically illustrated step by step.
关键词: min-max method nonlinear oscillation duffing equation mathematical pendulum He’s energy balance method
Parametric oscillation of cables and aerodynamic effect
Yong XIA, Jing ZHANG, Youlin XU, Yozo FUJINO,
《结构与土木工程前沿(英文)》 2010年 第4卷 第3期 页码 321-325 doi: 10.1007/s11709-010-0028-z
关键词: parametric vibration cables cable-stayed bridge nonlinear vibration
《环境科学与工程前沿(英文)》 2022年 第16卷 第2期 doi: 10.1007/s11783-021-1460-0
•Strong ENSO influence on AOD is found in southern China region.
关键词: El Niño–Southern Oscillation Aerosol concentration Aerosol particle size Contribution separation Decadal trend Southern China
龙运佳
《中国工程科学》 2001年 第3卷 第2期 页码 10-15
世界是非线性的,线性只是其近似描述,混沌的发现表明:某些确定性非线性系统具有内在的随机行为。事实上,以往20年,无所不在的混沌现象几乎在每个学科都有所报道,如数学、物理学、化学,甚至社会科学。但理论研究学者的主要兴趣在于探究混沌的本质。与此同时,混沌的实际利用在许多工程领域受到重视,如信息工程、系统工程、医药工程、农业工程、电气工程、生物工程、机械工程、土木工程等。混沌工程学是一门新的研究混沌实际利用及其基本理论的非线性工程科学。文章对现代混沌工程学的定义、对象、概念、方法、理论与应用加以总结,并介绍其近来的进展及作者的工作。混沌工程学在国民经济与国防建设中研究的热点是:混沌分析技术,混沌控制技术与混沌生成技术。
Insult of gastroesophageal reflux on airway: clinical significance of pharyngeal nozzle
null
《医学前沿(英文)》 2015年 第9卷 第1期 页码 117-122 doi: 10.1007/s11684-014-0343-1
At the very time of global paying the highest attention to the worst insults of smoking as well as haze on the airway, everybody knows both are exogenous and noticeable. However, people mostly, including many medical personnel, do not know how badly the gastroesophageal reflux (GER) insults on our own airway. Symptoms of GER are commonly seen as heartburn and regurgitation, which can be mostly tolerated. However, when the up going gastric content reversely passes the esophagus and then the distal pharynx, where it appears a beak like stricture, serving as a nozzle, so as to produce numerous micro-particles and reach the oro-nasal cavity and also the airway causing allergic rhinitis and asthmatic attacks, even pulmonary parenchyma lesions. It will reduce life quality or even jeopardize life. The point that the endogenous insult appears in the respiratory system, but originates from the digestive tract is not well known and often undiagnosed and not correctly treated. The GER induced airway challenge is a treatable and preventive entity, as soon as a diagnosis is made, a good relief could be expected by means of life style adjustment, medicine, or fixation of the patulous cardia through radiofrequency or fundoplication. The author Dr. Zhonggao Wang had suffered it for long and symptoms disappeared for 8 years after anti-reflux surgery. Here is a presentation of Dr. Zhonggao Wang and his team’s work and would call attention to the public so as to recognize this relatively unknown entity — a treatable condition occurring from human itself, but not from outside surroundings as smoking or haze does.
关键词: gastroesophageal reflux airway pharyngeal nozzle micro-aspiration asthma
Oscillation frequency of simplified arterial tubes
Hui AN, Fan HE, Lingxia XING, Xiaoyang LI
《机械工程前沿(英文)》 2009年 第4卷 第3期 页码 300-304 doi: 10.1007/s11465-009-0038-5
关键词: spatial kinematics natural frequency finite element method
M Helal Uddin, Nesrin Ozalp, Jens Heylen, Cedric Ophoff
《化学科学与工程前沿(英文)》 2018年 第12卷 第4期 页码 683-696 doi: 10.1007/s11705-018-1782-z
An innovative and efficient design of solar receivers/reactors can enhance the production of clean fuels via concentrated solar energy. This study presents a new jet-type burner nozzle for gaseous feedstock injection into a cavity solar receiver inspired from the combustion technology. The nozzle design was adapted from a combustion burner and successfully implemented into a solar receiver and studied the influence of the nozzle design on the fluid mixing and temperature distribution inside the solar receiver using a 7 kW solar simulator and nitrogen as working fluid. Finally, a thorough computational fluid dynamics (CFD) analysis was performed and validated against the experimental results. The CFD results showed a variation of the gas flow pattern and gas mixing after the burner nozzle adaptation, which resulted an intense effect on the heat transfer inside the solar receiver.
关键词: solar reactor nozzle CFD heat transfer mixing and recirculation
Improvement to observability measures of LFO modes in power systems with DFIGs
Shenghu LI
《能源前沿(英文)》 2021年 第15卷 第2期 页码 539-549 doi: 10.1007/s11708-019-0617-z
关键词: wind power system low-frequency oscillation (LFO) observability measure sensitivity doubly-fed induction generator (DFIG)
堆积床相变储热系统中径向孔隙率振荡分布对热性能的影响 Article
刘红兵, 赵长颖
《工程(英文)》 2021年 第7卷 第4期 页码 515-525 doi: 10.1016/j.eng.2020.05.020
由于具有较高的储热能力和传热速率,堆积床相变储热被认为是一种很有潜力的储热方法。在堆积床中,壁面效应会影响相变胶囊的填充结构,从而引起径向孔隙率的振荡。本研究建立了一个基于球体实际堆积过程的三维堆积床相变储热模型,以描述径向孔隙率的振荡分布,并分析了其内部的流动和传热情况。通过在堆积床中沿径向不同位置截取圆柱面,揭示了相变胶囊的排列与径向孔隙率之间的对应关系。径向孔隙率的振荡分布导致换热流体速度呈不均匀分布,因此相变材料的径向温度分布和液相分数分布进一步受到影响。此外,本文讨论了不同的无量纲参数(如管与胶囊的直径比、雷诺数和史蒂芬数)对换热流体和相变材料径向特性的影响。结果表明,不同的直径比对应于不同的径向孔隙率分布。此外,随着直径比的增加,在壁面附近区域换热流体速度显著变化,而中心区域换热流体速度的不均匀性将减小。雷诺数和史蒂芬数对换热流体的相对速度分布有轻微影响,而更高的雷诺数可导致速度成比例地提高,史蒂芬数的增加可加快堆积床相变储热系统的储热过程。
Investigation of vortical flows over oscillating body using fast Lagrangian vortex method
Baoshan ZHU ,
《能源前沿(英文)》 2009年 第3卷 第3期 页码 297-306 doi: 10.1007/s11708-009-0010-4
关键词: unsteady vortical flows fast vortex method vortex shedding rotational oscillation thin cambered blade
含有任意边界的m×n阶RLC网络的等效复阻抗特性 Article
Zhi-zhong TAN, Hong ZHU, Jihad H. ASAD, Chen XU, Hua TANG
《信息与电子工程前沿(英文)》 2017年 第18卷 第12期 页码 2070-2081 doi: 10.1631/FITEE.1700037
关键词: RLC网络;谐振性质;振荡特性;幅频特性
标题 作者 时间 类型 操作
Depth of cut models for multipass abrasive waterjet cutting of alumina ceramics with nozzle oscillation
Jun WANG
期刊论文
Piezoelectric diffuser/nozzle micropump with double pump chambers
WANG Wei, ZHANG Ying, TIAN Li, CHEN Xiaojie, LIU Xiaowei
期刊论文
Experimental and CFD analysis of nozzle position of subsonic ejector
Xilai ZHANG, Shiping JIN, Suyi HUANG, Guoqing TIAN
期刊论文
Influence of nozzle height to width ratio on ignition and NO
Liutao SUN, Yonghong YAN, Rui SUN, Zhengkang PENG, Chunli XING, Jiangquan WU
期刊论文
Numerical analysis of strongly nonlinear oscillation systems using He’s max-min method
H. BABAZADEH, G. DOMAIRRY, A. BARARI, R. AZAMI, A. G. DAVODI
期刊论文
Parametric oscillation of cables and aerodynamic effect
Yong XIA, Jing ZHANG, Youlin XU, Yozo FUJINO,
期刊论文
Evaluation of the influence of El Niño–Southern Oscillation on air quality in southern China from long-term
期刊论文
A new approach for fuel injection into a solar receiver/reactor: Numerical and experimental investigation
M Helal Uddin, Nesrin Ozalp, Jens Heylen, Cedric Ophoff
期刊论文
Investigation of vortical flows over oscillating body using fast Lagrangian vortex method
Baoshan ZHU ,
期刊论文