Resource Type

Journal Article 181

Year

2023 11

2022 8

2021 11

2020 7

2019 5

2018 14

2017 16

2016 6

2015 7

2014 10

2013 12

2012 7

2011 4

2010 3

2009 10

2008 13

2007 12

2006 8

2005 2

2004 3

open ︾

Keywords

frequency 9

natural frequency 3

Algebraic Method (AGM) 2

Compressed sensing 2

Deep learning 2

Direction of arrival 2

dynamics 2

finite element method 2

frequency response 2

ALK fusion 1

FAK6/7 1

H∞ control 1

AC excited 1

AF (atrial fibrillation) 1

Acoustic localization 1

Active surface wave 1

Agent simulation 1

Aluminum electrolysis 1

Amplitude-frequency 1

open ︾

Search scope:

排序： Display mode:

Structural total least squares algorithm for locating multiple disjoint sources based on AOA/TOA/FOA None

Xin CHEN, Ding WANG, Rui-rui LIU, Jie-xin YIN, Ying WU

Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 7,   Pages 917-936 doi: 10.1631/FITEE.1700735

Abstract: According to the available measurements including the angle-of-arrival (AOA), time-of-arrival (TOA),and frequency-of-arrival (FOA), the corresponding pseudo linear equations are deduced.

Keywords： Single-station     Structural total least squares     Inverse iteration     Angle-of-arrival (AOA)     Time-of-arrival(TOA)     Frequency-of-arrival (FOA)     Disjoint sources    

HTML PDF Collect

Passive source localization using importance sampling based on TOA and FOA measurements Article

Rui-rui LIU, Yun-long WANG, Jie-xin YIN, Ding WANG, Ying WU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 8,   Pages 1167-1179 doi: 10.1631/FITEE.1601657

Abstract: can achieve a high accuracy but involves high calculation burdens, especially when based on time-of-arrivaland frequency-of-arrival measurements for its internal nonlinearity and nonconvex nature.

Keywords： Passive source localization     Time of arrival (TOA)     Frequency of arrival (FOA)     Monte Carlo importance    

HTML PDF Collect

Acoustic localization with multi-layer isogradient sound speed profile using TDOA and FDOA Research Article

Dongzhou ZHAN, Sitian WANG, Shougui CAI, Huarong ZHENG, Wen XU,wxu@zju.edu.cn

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 1,   Pages 164-175 doi: 10.1631/FITEE.2100398

Abstract: In the underwater medium, the speed of sound varies with water depth, temperature, and salinity. The inhomogeneity of water leads to bending of sound rays, making the existing localization algorithms based on straight-line propagation less precise. To realize high-precision node positioning in s (UASNs), a multi-layer isogradient (SSP) model is developed using the linear segmentation approximation approach. Then, the sound ray tracking problem is converted into a polynomial root-searching problem. Based on the derived gradient of the signal's Doppler shift at the sensor node, a novel underwater node localization algorithm is proposed using both the and . Simulations are implemented to illustrate the effectiveness of the proposed algorithm. Compared with the traditional straight-line propagation method, the proposed algorithm can effectively handle the sound ray bending phenomenon. Estimation accuracy with different SSP modeling errors is also investigated. Overall, accurate and reliable node localization can be achieved.

Keywords： Underwater acoustic sensor network     Acoustic localization     Sound speed profile     Time difference of arrival(TDOA)     Frequency difference of arrival (FDOA)    

HTML PDF Collect

The Regularity of Time of Arrival in 90° Bend Tunnel for Shock Wave due to Explosions From High Explosive

Shen Jun,Li Yongchi,Pang Weibin

Strategic Study of CAE 2006, Volume 8, Issue 3,   Pages 53-57

Abstract: Through collecting data gained from 4 experiments, a formula was proposed which can compute time of arrival

Keywords： internal explosion     shock wave     time of arrival    

HTML PDF Collect

A two-echelon （S-1，S） inventory model for repairable items based on markovian arrival process

Chen Tong,Li Fang and Di Peng

Strategic Study of CAE 2015, Volume 17, Issue 5,   Pages 113-119

Abstract: repairable items and single repair facility， and assumes that the item demand occur according to a markovian arrival

Keywords： （S-1，S） policy；two-echelon inventory；repairable item；markovian arrival process    

HTML PDF Collect

A frequency error estimation for isogeometric analysis of Kirchhoff–Love cylindrical shells

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0006-x

Abstract: A frequency error estimation is presented for the isogeometric free vibration analysis of Kirchhoff–LoveBy analyzing the discrete isogeometric equations with the aid of harmonic wave assumption, the frequencyIn particular, the governing relationship of the continuum frequency for Kirchhoff–Love cylindrical shellsis naturally embedded into the frequency error measures without the need of explicit frequency expressionsNumerical results not only thoroughly verify the theoretical convergence rates of frequency solutions

Keywords： isogeometric analysis     Kirchhoff–Love cylindrical shell     free vibration     frequency error     convergence    

HTML PDF Collect

Calculation of collision frequency function for aerosol particles in free molecule regime in presence

Xiaowei LUO, Yannick BENICHOU, Suyuan YU

Frontiers in Energy 2013, Volume 7, Issue 4,   Pages 506-510 doi: 10.1007/s11708-013-0275-5

Abstract: The collision frequency function for aerosol particles has already been calculated for the free moleculeforce, electric force and molecular forces, created by particles themselves, recalculated the collision frequencyAttractive forces increase naturally the collision frequency, while repulsive forces decrease it.

Keywords： aerosol particles     collision frequency function     coagulation    

HTML PDF Collect

Fuel variability effect on flickering frequency of diffusion flames

Jizhao LI, Yang ZHANG

Frontiers in Energy 2009, Volume 3, Issue 2,   Pages 134-140 doi: 10.1007/s11708-009-0034-9

Abstract: The intent of this study is to investigate the fuel variability on the flickering frequency of diffusionIt was found that the low frequency oscillation of flow and flame structures depended only weakly onWhen a mixture of methane/propane at a ratio of 1:1 was used the peak flickering frequency was aroundMechanisms thought to produce changes in the dynamic response and frequency harmonics were discussed.

Keywords： fuel variability     flickering frequency     diffusion flames     dynamics of combustion    

HTML PDF Collect

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

Frontiers in Energy 2012, Volume 6, Issue 2,   Pages 148-154 doi: 10.1007/s11708-012-0174-1

Abstract: Based on the analysis of frequency regulation, mathematic models for nuclear units in the grid are establishedThe relationship between different styles of frequency regulation and the allowable capacity of the nuclear

Keywords： nuclear units capacity     overspeed     primary frequency control (PFC)     second frequency control (SFC)    

HTML PDF Collect

Oscillation frequency of simplified arterial tubes

Hui AN, Fan HE, Lingxia XING, Xiaoyang LI

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 300-304 doi: 10.1007/s11465-009-0038-5

Abstract: To construct the spatial kinetic equation of an arterial tube and obtain its radial natural frequencyThe results show that the first-order frequency is 15.8 Hz and the obtained exact analytical solutions

Keywords： spatial kinematics     natural frequency     finite element method    

HTML PDF Collect

Land use/cover change effects on floods with different return periods: a case study of Beijing, China

Yueling WANG, Xiaoliu YANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 5,   Pages 769-776 doi: 10.1007/s11783-013-0542-z

Abstract: statistical methods was applied to quantify the effect of LUCC on floods in terms of inundation extent, flood arrivalof analysis Beijing experienced unprecedented LUCC; 2) LUCC can affect inundation extent and flood arrival

Keywords： inundation extent     flood arrival time     maximum water depth     shallow flow model    

HTML PDF Collect

Parameter identification of interconnected power system frequency after trip-out of high voltage transmission

Xuzhan ZHOU,Shanshan LIU,Mingkun WANG,Yiping DAI,Yaohua TANG

Frontiers in Energy 2014, Volume 8, Issue 3,   Pages 386-393 doi: 10.1007/s11708-014-0323-9

Abstract: Accurate modeling and parameters of high voltage (HV) grid are critical for stability research of system frequencyIn this paper, simulation modeling of the system frequency was conducted of an interconnected power system

Keywords： high voltage (HV) grid     frequency stability parameter identification     primary frequency regulation (PFR    

HTML PDF Collect

Dependence of error sensitivity of frequency on bias voltage in force-balanced micro accelerometer

Lili CHEN, Wu ZHOU

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 2,   Pages 146-149 doi: 10.1007/s11465-013-0260-z

Abstract:

To predict more precisely the frequency of force-balanced micro accelerometer with different biasvoltages, 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 operationsensitivity with designed parameters of structure, circuit and process error can be used to predict the frequency

Keywords： Micro-Electro-Mechanical Systems (MEMS)     micro accelerometer     force-balanced micro accelerometer     frequency    

HTML PDF Collect

Potential unreliability of ALK variant allele frequency in the efficacy prediction of targeted therapy

Frontiers of Medicine 2023, Volume 17, Issue 3,   Pages 493-502 doi: 10.1007/s11684-022-0946-x

Abstract: Anaplastic lymphoma kinase (ALK) is the most common fusion gene involved in non-small cell lung cancer (NSCLC), and remarkable response has been achieved with the use of ALK tyrosine kinase inhibitors (ALK-TKIs). However, the clinical efficacy is highly variable. Pre-existing intratumoral heterogeneity (ITH) has been proven to contribute to the poor treatment response and the resistance to targeted therapies. In this work, we investigated whether the variant allele frequencies (VAFs) of ALK fusions can help assess ITH and predict targeted therapy efficacy. Through the application of next-generation sequencing (NGS), 7.2% (326/4548) of patients were detected to be ALK positive. On the basis of the adjusted VAF (adjVAF, VAF normalization for tumor purity) of four different threshold values (adjVAF < 50%, 40%, 30%, or 20%), the association of ALK subclonality with crizotinib efficacy was assessed. Nonetheless, no statistical association was observed between median progression-free survival (PFS) and ALK subclonality assessed by adjVAF, and a poor correlation of adjVAF with PFS was found among the 85 patients who received first-line crizotinib. Results suggest that the ALK VAF determined by hybrid capture-based NGS is probably unreliable for ITH assessment and targeted therapy efficacy prediction in NSCLC.

Keywords： next-generation sequencing     fluorescence in situ hybridization     immunohistochemistry     variant allele frequency    

HTML PDF Collect

Remote calibration system for frequency based on in-place benchmark

Xiaobin HONG, Guixiong LIU, Zhuokui WU, Xipeng DU,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3,   Pages 316-321 doi: 10.1007/s11465-010-0021-1

Abstract: calibration mode based on material object reference, a new model of a remote calibration system for frequencysome key problems for the remote calibration system is particularly discussed, including the time and frequencybenchmark receiving module based on global positioning system (GPS), frequency comparison based on aphase method, frequency division based on dual high-frequency phase locked loop (PLL), and remote calibration

Keywords： remote calibration     in-place benchmark     frequency comparison     global position system (GPS)    

HTML PDF Collect

Title Author Date Type Operation

Structural total least squares algorithm for locating multiple disjoint sources based on AOA/TOA/FOA

Xin CHEN, Ding WANG, Rui-rui LIU, Jie-xin YIN, Ying WU

Journal Article

Passive source localization using importance sampling based on TOA and FOA measurements

Rui-rui LIU, Yun-long WANG, Jie-xin YIN, Ding WANG, Ying WU

Journal Article

Acoustic localization with multi-layer isogradient sound speed profile using TDOA and FDOA

Dongzhou ZHAN, Sitian WANG, Shougui CAI, Huarong ZHENG, Wen XU,wxu@zju.edu.cn

Journal Article

The Regularity of Time of Arrival in 90° Bend Tunnel for Shock Wave due to Explosions From High Explosive

Shen Jun,Li Yongchi,Pang Weibin

Journal Article

A two-echelon （S-1，S） inventory model for repairable items based on markovian arrival process

Chen Tong,Li Fang and Di Peng

Journal Article

A frequency error estimation for isogeometric analysis of Kirchhoff–Love cylindrical shells

Journal Article

Calculation of collision frequency function for aerosol particles in free molecule regime in presence

Xiaowei LUO, Yannick BENICHOU, Suyuan YU

Journal Article

Fuel variability effect on flickering frequency of diffusion flames

Jizhao LI, Yang ZHANG

Journal Article

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

Journal Article

Oscillation frequency of simplified arterial tubes

Hui AN, Fan HE, Lingxia XING, Xiaoyang LI

Journal Article

Land use/cover change effects on floods with different return periods: a case study of Beijing, China

Yueling WANG, Xiaoliu YANG

Journal Article

Parameter identification of interconnected power system frequency after trip-out of high voltage transmission

Xuzhan ZHOU,Shanshan LIU,Mingkun WANG,Yiping DAI,Yaohua TANG

Journal Article

Dependence of error sensitivity of frequency on bias voltage in force-balanced micro accelerometer

Lili CHEN, Wu ZHOU

Journal Article

Potential unreliability of ALK variant allele frequency in the efficacy prediction of targeted therapy

Journal Article

Remote calibration system for frequency based on in-place benchmark

Xiaobin HONG, Guixiong LIU, Zhuokui WU, Xipeng DU,

Journal Article