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Analysis of frequency characteristics of compliant mechanisms
WANG Wenjing, YU Yueqing
《机械工程前沿(英文)》 2007年 第2卷 第3期 页码 267-271 doi: 10.1007/s11465-007-0046-2
关键词: compliant mechanisms convenient sensitivity work analysis
Dynamic characteristics of a magnetorheological pin joint for civil structures
Yancheng LI,Jianchun LI
《机械工程前沿(英文)》 2014年 第9卷 第1期 页码 15-33 doi: 10.1007/s11465-014-0283-0
Magnetorheological (MR) pin joint is a novel device in which its joint moment resistance can be controlled in real-time by altering the applied magnetic field. The smart pin joint is intended to be used as a controllable connector between the columns and beams of a civil structure to instantaneously shift the structural natural frequencies in order to avoid resonance and therefore to reduce unwanted vibrations and hence prevent structural damage. As an intrinsically nonlinear device, modelling of this MR fluid based device is a challenging task and makes the design of a suitable control algorithm a cumbersome situation. Aimed at its application in civil structure, the main purpose of this paper is to test and characterise the hysteretic behaviour of MR pin joint. A test scheme is designed to obtain the dynamic performance of MR pin joint in the dominant earthquake frequency range. Some unique phenomena different from those of MR damper are observed through the experimental testing. A computationally-efficient model is proposed by introducing a hyperbolic element to accurately reproduce its dynamic behaviour and to further facilitate the design of a suitable control algorithm. Comprehensive investigations on the model accuracy and dependences of the proposed model on loading condition (frequency and amplitude) and input current level are reported in the last section of this paper.
关键词: Magnetorheological pin joint hyperbolic hysteresis model experimental testing frequency dependence
Tae Un PAK; Guk Rae JO; Un Chol HAN
《结构与土木工程前沿(英文)》 2022年 第16卷 第8期 页码 1029-1039 doi: 10.1007/s11709-022-0861-x
关键词: wavelet analysis blast-induced vibration frequency characteristics underground excavation
Comparative study of oscillating flow characteristics of cryocooler regenerator at low temperatures
Yonglin JU , Qingqing SHEN ,
《能源前沿(英文)》 2009年 第3卷 第1期 页码 80-84 doi: 10.1007/s11708-009-0008-y
关键词: friction factor regenerator oscillating flow high frequency
A frequency error estimation for isogeometric analysis of Kirchhoff–Love cylindrical shells
《结构与土木工程前沿(英文)》 doi: 10.1007/s11709-023-0006-x
关键词: isogeometric analysis Kirchhoff–Love cylindrical shell free vibration frequency error convergence
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
Xiaowei LUO, Yannick BENICHOU, Suyuan YU
《能源前沿(英文)》 2013年 第7卷 第4期 页码 506-510 doi: 10.1007/s11708-013-0275-5
关键词: aerosol particles collision frequency function coagulation
Fuel variability effect on flickering frequency of diffusion flames
Jizhao LI, Yang ZHANG
《能源前沿(英文)》 2009年 第3卷 第2期 页码 134-140 doi: 10.1007/s11708-009-0034-9
关键词: fuel variability flickering frequency diffusion flames dynamics of combustion
Capacity limitation of nuclear units in grid based on analysis of frequency regulation
Yiping DAI, Pan JIANG, Lin GAO, Weimin KAN, Xiaoqing XIAO, Ge JIN
《能源前沿(英文)》 2012年 第6卷 第2期 页码 148-154 doi: 10.1007/s11708-012-0174-1
关键词: nuclear units capacity overspeed primary frequency control (PFC) second frequency control (SFC)
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
Xuzhan ZHOU,Shanshan LIU,Mingkun WANG,Yiping DAI,Yaohua TANG
《能源前沿(英文)》 2014年 第8卷 第3期 页码 386-393 doi: 10.1007/s11708-014-0323-9
关键词: high voltage (HV) grid frequency stability parameter identification primary frequency regulation (PFR)
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
《医学前沿(英文)》 2023年 第17卷 第3期 页码 493-502 doi: 10.1007/s11684-022-0946-x
关键词: ALK fusion next-generation sequencing fluorescence in situ hybridization immunohistochemistry variant allele frequency intratumoral heterogeneity targeted therapy
Remote calibration system for frequency based on in-place benchmark
Xiaobin HONG, Guixiong LIU, Zhuokui WU, Xipeng DU,
《机械工程前沿(英文)》 2010年 第5卷 第3期 页码 316-321 doi: 10.1007/s11465-010-0021-1
关键词: remote calibration in-place benchmark frequency comparison global position system (GPS)
Research progress in pathogenic genes of hereditary non-syndromic mid-frequency deafness
null
《医学前沿(英文)》 2016年 第10卷 第2期 页码 137-142 doi: 10.1007/s11684-016-0449-8
Hearing impairment is considered as the most prevalent impairment worldwide. Almost 600 million people in the world suffer from mild or moderate hearing impairment, an estimated 10% of the human population. Genetic factors play an important role in the pathogenesis of this disorder. Hereditary hearing loss is divided into syndromic hearing loss (associated with other anomalies) and non-syndromic hearing loss (not associated with other anomalies). Approximately 80% of genetic deafness is non-syndromic. On the basis of the frequency of hearing loss, hereditary non-syndromic hearing loss can be divided into high-, mid-, low-, and total-frequency hearing loss. An audiometric finding of mid-frequency sensorineural hearing loss, or a “bowl-shaped” audiogram, is uncommon. Up to now, merely 7 loci have been linked to mid-frequency hearing loss. Only four genetic mid-frequency deafness genes, namely, DFNA10 (EYA4), DFNA8/12 (TECTA), DFNA13 (COL11A2), DFNA44 (CCDC50), have been reported to date. This review summarizes the research progress of the four genes to draw attention to mid-frequency deafness genes.
关键词: hereditary non-syndromic hearing loss mid-frequency hearing loss deafness genes
标题 作者 时间 类型 操作
Dynamic characteristics of a magnetorheological pin joint for civil structures
Yancheng LI,Jianchun LI
期刊论文
Prediction of characteristic blast-induced vibration frequency during underground excavation by using
Tae Un PAK; Guk Rae JO; Un Chol HAN
期刊论文
Comparative study of oscillating flow characteristics of cryocooler regenerator at low temperatures
Yonglin JU , Qingqing SHEN ,
期刊论文
Calculation of collision frequency function for aerosol particles in free molecule regime in presence
Xiaowei LUO, Yannick BENICHOU, Suyuan YU
期刊论文
Capacity limitation of nuclear units in grid based on analysis of frequency regulation
Yiping DAI, Pan JIANG, Lin GAO, Weimin KAN, Xiaoqing XIAO, Ge JIN
期刊论文
Parameter identification of interconnected power system frequency after trip-out of high voltage transmission
Xuzhan ZHOU,Shanshan LIU,Mingkun WANG,Yiping DAI,Yaohua TANG
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
Potential unreliability of ALK variant allele frequency in the efficacy prediction of targeted therapy
期刊论文
Remote calibration system for frequency based on in-place benchmark
Xiaobin HONG, Guixiong LIU, Zhuokui WU, Xipeng DU,
期刊论文