检索范围:
排序: 展示方式:
Preparation and property characterization of PAA/Fe3O4 nanocomposite
WEI Shanshan, ZHANG Yi, XU Jiarui
《化学科学与工程前沿(英文)》 2007年 第1卷 第3期 页码 233-237 doi: 10.1007/s11705-007-0042-4
关键词: magnetometer superparamagnetic ultra-micro thermogravimetry transmission
Review on the progress of ultra-precision machining technologies
Julong YUAN, Binghai LYU, Wei HANG, Qianfa DENG
《机械工程前沿(英文)》 2017年 第12卷 第2期 页码 158-180 doi: 10.1007/s11465-017-0455-9
Ultra-precision machining technologies are the essential methods, to obtain the highest form accuracy and surface quality. As more research findings are published, such technologies now involve complicated systems engineering and been widely used in the production of components in various aerospace, national defense, optics, mechanics, electronics, and other high-tech applications. The conception, applications and history of ultra-precision machining are introduced in this article, and the developments of ultra-precision machining technologies, especially ultra-precision grinding, ultra-precision cutting and polishing are also reviewed. The current state and problems of this field in China are analyzed. Finally, the development trends of this field and the coping strategies employed in China to keep up with the trends are discussed.
关键词: ultra-precision grinding ultra-precision cutting ultra-precision polishing research status in China development tendency
Flexible micro flow sensor for micro aerial vehicles
Rong ZHU, Ruiyi QUE, Peng LIU
《机械工程前沿(英文)》 2017年 第12卷 第4期 页码 539-545 doi: 10.1007/s11465-017-0427-0
This article summarizes our studies on micro flow sensors fabricated on a flexible polyimide circuit board by a low-cost hybrid process of thin-film deposition and circuit printing. The micro flow sensor has merits of flexibility, structural simplicity, easy integrability with circuits, and good sensing performance. The sensor, which adheres to an object surface, can detect the surface flow around the object. In our study, we install the fabricated micro flow sensors on micro aerial vehicles (MAVs) to detect the surface flow variation around the aircraft wing and deduce the aerodynamic parameters of the MAVs in flight. Wind tunnel experiments using the sensors integrated with the MAVs are also conducted.
关键词: micro flow sensor flexible sensor surface flow sensing aerodynamic parameter micro aerial vehicle (MAV)
Gas marbles: ultra-long-lasting and ultra-robust bubbles formed by particle stabilization
《化学科学与工程前沿(英文)》 页码 1681-1687 doi: 10.1007/s11705-022-2180-0
关键词: bubble particles interfaces armored bubble liquid marble gas marble Pickering emulsion
Properties of cement grout modified with ultra-fine slag
Sowmini GOPINATHAN, K B ANAND
《结构与土木工程前沿(英文)》 2018年 第12卷 第1期 页码 58-66 doi: 10.1007/s11709-017-0383-0
关键词: cement grout ultra-fine slag flowability bleeding viscosity
Dependence of error sensitivity of frequency on bias voltage in force-balanced micro accelerometer
Lili CHEN, Wu ZHOU
《机械工程前沿(英文)》 2013年 第8卷 第2期 页码 146-149 doi: 10.1007/s11465-013-0260-z
To predict more precisely the frequency of force-balanced micro accelerometer with different bias voltages, the effects of bias voltages on error sensitivity of frequency is studied. The resonance frequency of accelerometer under closed loop control is derived according to its operation principle, and its error sensitivity is derived and analyzed under over etching structure according to the characteristics of Deep Reaction Ion Etching (DRIE). Based on the theoretical results, micro accelerometer is fabricated and tested to study the influences of AC bias voltage and DC bias voltage on sensitivity, respectively. Experimental results indicate that the relative errors between test data and theory data are less than 7%, and the fluctuating value of error sensitivity under the range of voltage adjustment is less than 0.01 μm . It is concluded that the error sensitivity with designed parameters of structure, circuit and process error can be used to predict the frequency of accelerometer with no need to consider the influence of bias voltage.
关键词: Micro-Electro-Mechanical Systems (MEMS) micro accelerometer force-balanced micro accelerometer frequency error sensitivity
Numerical simulation of micro scale flowing and boiling
Wen WANG, Rui ZHUAN,
《能源前沿(英文)》 2009年 第3卷 第4期 页码 396-401 doi: 10.1007/s11708-009-0049-2
关键词: volume-of-fluid (VOF) micro channel nucleate boiling bubble dynamics simulation
Special issue: Ultra-precision machining
Zhuangde JIANG,Dongming GUO
《机械工程前沿(英文)》 2017年 第12卷 第1期 页码 1-2 doi: 10.1007/s11465-017-0445-y
《结构与土木工程前沿(英文)》 2021年 第15卷 第6期 页码 1426-1440 doi: 10.1007/s11709-021-0783-z
关键词: beam external prestressing ultra-high-performance concrete fiber-reinforced polymers shear behavior design equation
Dynamical research on spherical micro actuator with piezoelectric ceramic stacks drivers
ZHANG Ruihua, CHEN Haichu
《机械工程前沿(英文)》 2007年 第2卷 第4期 页码 433-438 doi: 10.1007/s11465-007-0074-y
关键词: spherical micro-gripper friction coefficient dynamic frequency
1000 MW ultra-supercritical turbine steam parameter optimization
FENG Weizhong
《能源前沿(英文)》 2008年 第2卷 第2期 页码 187-193 doi: 10.1007/s11708-008-0030-5
《结构与土木工程前沿(英文)》 2021年 第15卷 第4期 页码 895-904 doi: 10.1007/s11709-021-0759-z
关键词: steel bridge deck pavement ultra-high-performance concrete epoxy resin composite structure bending fatigue performance
Operating characteristic analysis on the ultra-thin low temperature floor-heating system
Hualing ZHANG, Xiaopeng SONG
《结构与土木工程前沿(英文)》 2013年 第7卷 第2期 页码 127-132 doi: 10.1007/s11709-013-0200-3
关键词: ultra-thin floor heating panel the preheating time thermal comfort energy saving
Laboratory assessment of Alaska aggregates using Micro-Deval test
Jenny LIU,Sheng ZHAO,Anthony MULLIN
《结构与土木工程前沿(英文)》 2017年 第11卷 第1期 页码 27-34 doi: 10.1007/s11709-016-0359-5
关键词: aggregate durability Washington degradation test Micro-Deval test
Characterization of micro-mixing in a novel impinging streams reactor
Hui HU, Zhiming CHEN, Zhen JIAO
《化学科学与工程前沿(英文)》 2009年 第3卷 第1期 页码 58-64 doi: 10.1007/s11705-009-0106-8
关键词: micro-mixing impinging streams reactor turbulent mixing mass transfer
标题 作者 时间 类型 操作
Preparation and property characterization of PAA/Fe3O4 nanocomposite
WEI Shanshan, ZHANG Yi, XU Jiarui
期刊论文
Review on the progress of ultra-precision machining technologies
Julong YUAN, Binghai LYU, Wei HANG, Qianfa DENG
期刊论文
Dependence of error sensitivity of frequency on bias voltage in force-balanced micro accelerometer
Lili CHEN, Wu ZHOU
期刊论文
Shear behavior of ultra-high-performance concrete beams prestressed with external carbon fiber-reinforced
期刊论文
Dynamical research on spherical micro actuator with piezoelectric ceramic stacks drivers
ZHANG Ruihua, CHEN Haichu
期刊论文
Performance of steel bridge deck pavement structure with ultra high performance concrete based on resin
期刊论文
Operating characteristic analysis on the ultra-thin low temperature floor-heating system
Hualing ZHANG, Xiaopeng SONG
期刊论文
Laboratory assessment of Alaska aggregates using Micro-Deval test
Jenny LIU,Sheng ZHAO,Anthony MULLIN
期刊论文